OUTDOOR UNIT OF AIR CONDITIONER AND HVAC DEVICE

Abstract

The present application provides an outdoor unit of an air conditioner, and a HVAC device. The outdoor unit of the air conditioner includes: a casing, a fan, and a heat exchanger; the casing is provided with an air outlet; the fan is arranged facing the air outlet; the fan is provided with a rotating central axis, and the heat exchanger is arranged around the rotating central axis; a distance between the heat exchanger and the fan in an axial direction of the rotating central axis is d, a diameter of the fan is D, and d/D≥0.05. In the outdoor unit of the air conditioner provided in the present application, the distance between the heat exchanger and the fan in the axial direction of the rotating central axis, is d, and the diameter of the fan is D. By arranging d/D to be greater than or equal to 0.05.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS

The present application claims priority from Chinese patent application No. 202311250347.7, filed on Sep. 25, 2023, the entire content of which is incorporated herein by reference.

FIELD

The present application relates to the field of air conditioners, and more specifically to an outdoor unit of an air conditioner, and a HVAC (Heating Ventilation and Air Conditioning) device.

BACKGROUND

In outdoor units of the air conditioner, especially those with four sided air intake, since the heat exchanger is located on the airflow channel, which will cause certain disturbances to the airflow, the position relationship between the heat exchanger and the fan blade can affect the aerodynamic performance of the fan blade. Especially when there is interference between the projection of the heat exchanger on the horizontal plane and the projection of the outer edge of the fan blade on the horizontal plane, the interference part will generate turbulence, which will affect the airflow adjacent to the blades. Therefore, it is necessary to arrange the position of the heat exchanger in the airflow channel reasonably to reduce interference with the blades of the fan blade.

SUMMARY

Embodiments of the present application aim to provide an outdoor unit of an air conditioner, and an air conditioner, to solve the problem that the heat exchanger is easily affected the airflow adjacent to the fan in the art.

Embodiments of the present application is that an outdoor unit of an air conditioner is provided, which includes: a casing, a fan, and a heat exchanger; the casing is provided with an air outlet; the fan is arranged facing the air outlet; the fan is provided with a rotating central axis, and the heat exchanger is arranged around the rotating central axis; a distance between the heat exchanger and the fan in an axial direction of the rotating central axis is d, a diameter of the fan is D, and d/D≥0.05.

In one embodiment, the distance d between the heat exchanger and the fan in the axial direction of the rotating central axis is greater than or equal to 20 mm and less than or equal to 60 mm. That is, the distance d between the heat exchanger and the fan in a vertical direction is greater than or equal to 20 mm and less than or equal to 60 mm. In case that the distance d between the heat exchanger and the fan is too small, such as less than or equal to 20 mm, which will cause the distance between the blades of the fan and the heat exchanger to be too close. As long as the projection of the fan on the horizontal plane interferes with the projection of the heat exchanger on the horizontal plane, no matter how the diameter of the fan is changed, the heat exchanger will produce certain near-field airflow interference on the fan. In case that the distance d between the heat exchanger and the fan is too large, such as greater than or equal to 60 mm. Although such distance can reduce the airflow interference of the heat exchanger on the fan, it will cause the overall volume of the outdoor unit of the air conditioner to increase, which is not conducive to the transportation and mounting of the outdoor unit of the air conditioner.

In one embodiment, the diameter D of the fan is greater than or equal to 600 mm and less than or equal to 700 mm. In order to balance the smaller volume of the outdoor unit of the air conditioner and the higher air outlet efficiency of the fan, while ensuring that the heat exchanger has less near-field interference onto the fan, thus the diameter D of the fan is arranged to be greater than or equal to 600 mm and less than or equal to 700 mm.

In one embodiment, the distance d between the heat exchanger and the fan in the axial direction of the rotating central axis is greater than or equal to 35 mm and less than or equal to 45 mm, and the diameter D of the fan is 650 mm. The larger the diameter of the fan, the larger the volume of the outdoor unit of the air conditioner, the higher the air outlet efficiency of the fan, and the greater the near-field interference of the heat exchanger on the fan; the smaller the diameter of the fan, the smaller the volume of the outdoor unit of the air conditioner, the lower the air outlet efficiency of the fan, and the smaller the near-field interference of the heat exchanger on the fan. In order to balance the smaller volume of the outdoor unit of the air conditioner and the higher air outlet efficiency of the fan, while ensuring that the heat exchanger has less near-field interference onto the fan, thus the diameter D of the fan is arranged to be greater than or equal to 600 mm and less than or equal to 700 mm.

In one embodiment, the fan includes blades arranged circumferentially along the rotating central axis, each of the blades is arranged to provide with a curved surface, and each of the blades is provided with a blade tip arranged away from the air outlet. The fan further includes a central block, and a root of each of the blades is connected to the central block. A drive component such as a motor drives the central block to rotate, to cause each of the blades to rotate.

In one embodiment, a distance between the blade tip and the heat exchanger in the axial direction of the rotating central axis is the d. Therefore, in the axial direction of the rotating central axis, the distance d between the heat exchanger and the fan is the distance d between the blade tip and the heat exchanger.

In one embodiment, a periphery of each of the blades includes a trailing edge, an outer edge, and a leading edge sequentially connected; an end of the trailing edge away from the outer edge and an end of the leading edge away from the outer edge are both arranged adjacent to a root of the blade, and a joint between the outer edge and the leading edge is the blade tip, the outer edge is arranged gradually away from the air outlet in a direction from an end of the outer edge connected to the trailing edge to an end the outer edge connected to the leading edge, and the leading edge is arranged gradually away from the air outlet in a direction from the root of the blade to an end of the leading edge connected to the outer edge.

In one embodiment, the heat exchanger is provided with four heat exchange side surfaces sequentially connected, enabling the heat exchanger to intake air from the four heat exchange side surfaces. The blade has a change trend from the root to the blade tip that gradually moves away from the air outlet, and when the blade rotates, more airflow can be disturbed in the axial direction of the rotation central shaft, thus the air outlet efficiency is higher.

In one embodiment, the four heat exchange side surfaces are arranged surrounding the rotating central axis and form a mounting notch, and an electric control unit is provided at the mounting notch. The electric control unit is located inside the casing, and the heat exchanger, the fan, and other electrical driven mechanisms are electrically connected to the electric control unit. The turning on/off of the fan, the heat exchanger, and other structures can be controlled through the electric control unit.

In one embodiment, the outdoor unit is configured to include a fan unit and a heat exchanger unit, the casing includes a first housing and a second housing detachably connected with the first housing; the fan unit includes the first housing and the fan arranged in the first housing, the heat exchanger unit includes the second housing and the heat exchanger arranged in the second housing. The detachable connection of the casing facilitates the assembly and disassembly of the fan unit and the heat exchanger unit, as well as subsequent maintenance of the fan unit and the heat exchanger unit.

In one embodiment, the first housing includes a first sidewall portion arranged surrounding the rotating central axis, and the first sidewall portion is configured to be a cylindrical configuration provided with an upper opening and a lower opening along the rotating central axis, the upper opening of the first sidewall portion is configured to be the air outlet, and the lower opening of the first sidewall portion is configured to receive an air after heat exchanging by the heat exchanger.

In one embodiment, the fan unit includes a grille, the grille is mounted in upper opening of the first sidewall portion, a back side of the grille is arranged toward an internal space of the first sidewall portion, and the fan is mounted at a lower side of the grille. The grille being arranged in the upper opening of the first sidewall portion can adaptively adjust the direction of the air outlet.

In one embodiment, the first sidewall portion includes support portions, the support portions are arranged at the upper opening of the first sidewall portion, and the support portions are configured to jointly support the grille; and the support portions are located in a first plane, the first plane is perpendicular to the rotating central axis, the first plane is arranged lower than an internal concave space formed at an upper edge of the first sidewall portion; and the grille is received in the internal concave space and is fixed on the support portions. Herein, the thickness of the grille may be slightly less than or equal to the height of the internal concave space, and when the grille is received in the internal concave space, and the top surface of the grille is generally flush with the top surface of the first housing.

In one embodiment, the fan unit includes an air deflector, an inner wall of the air deflector surrounds to form an air guide channel provided with an upper opening and a lower opening, and an edge of the upper opening of the air guide channel is formed with upper mounting portions; the first sidewall portion includes support portions, the support portions are arranged at the upper opening of the first sidewall portion, lower sides of the support portions are respectively fixed on the upper mounting portions; and the upper sides of the support portions are configured to jointly support the grille; and the fan is fixed to the lower sides of the support portions, and the blades of the fan are located in the air guide channel and the diameter D of the fan is less than a diameter Dn of the air guide channel.

In one embodiment, the second housing includes a second sidewall portion arranged surrounding the rotating central axis, and the second sidewall portion is configured to be a cylindrical configuration provided with an upper opening and a lower opening, the lower opening of the second sidewall portion is mounted with a bottom wall supporting the heat exchanger, and the upper opening of the second sidewall portion is arranged corresponding to the lower opening of the first sidewall portion.

In one embodiment, the second sidewall portion is provided with a ventilation sidewall, the ventilation sidewall is arranged surrounding an outer side of the heat exchanger, the ventilation sidewall is provided with ventilation holes corresponding to the heat exchanger, the fan unit drives an outside air passing through the ventilation holes and the heat exchanger to exchange heat, the air after heat exchanging from the heat exchanger unit enters into the fan unit, and exits from the air outlet.

In one embodiment, the heat exchanger unit further includes an electronic control unit, the electronic control unit includes a bottom plate, a circuit board mounted on the bottom plate, and a cover portion connected with the bottom plate and covering the circuit board; and the ventilation sidewall is in a rectangular shape and is provided with an opening formed at a joint of adjacent sides of the ventilation sidewall, the bottom plate covers the opening of the ventilation sidewall, and the cover portion and the ventilation sidewall are constructed into a complete rectangle. Herein the design of the electronic control unit facilitates the mounting and protection of the electronic control unit, and does not affect the integrity of the second housing.

In one embodiment, a housing wall of the first housing is recessed towards the internal space to form groove portions, each of the groove portions is provided with a groove bottom wall along a recessed direction of the groove portion, a first groove wall connected to a lower side of the groove bottom wall, and a second groove wall connected to an upper side of the groove bottom wall; and the first housing is mounted on the second housing from top to bottom, an upper end of the second housing is inserted into the lower opening of the first housing, and the upper end of the second housing is configured to provide with a bearing surface to bear the first groove wall of each of the groove portions. Based on this, a quick fastening mounting can be achieved between the first housing and the second housing.

In one embodiment, a lower edge of the first housing is provided with first fixing holes, the upper end of the second housing is provided with second fixing holes, and the first fixing holes correspond to the second fixing holes.

In one embodiment, the fan unit includes an air deflector, an inner wall of the air deflector surrounds to form an air guide channel provided with an upper opening and a lower opening, an outer side of the air deflector is provided with side mounting portions, the groove bottom wall of each of the groove portions is provided with at least one mounting hole, and the side mounting portions are respectively fixed in the mounting holes in an one-to-one correspondence.

The present application further provides a HVAC device, which includes the outdoor unit of the air conditioner mentioned above and an indoor unit, the indoor unit and the outdoor unit are in communication with each other through a gas pipe and a liquid pipe to form a refrigerant circulation system.

In one embodiment, the outdoor unit includes a compressor, a heat source side heat exchanger and a gas liquid separator, the heat source side heat exchanger is the heat exchanger mentioned above, an end of the heat source side heat exchanger is connected to an exhaust port of the compressor, an other end of the heat source side heat exchanger is connected to the liquid pipe, an end of the gas liquid separator is connected to an air return port of the compressor, an other end of the gas liquid separator is connected to the gas pipe.

The beneficial effect of the outdoor unit of the air conditioner and the air conditioner provided by the present application is that, compared with the prior art, the outdoor unit of the air conditioner provided by the present application includes a fan, a heat exchanger, and a casing. The fan provides with a rotating central axis, and the heat exchanger is arranged around the rotating central axis. The distance between the heat exchanger and the fan in the axial direction of the rotating central axis is d, and the diameter of the fan is D. By arranging d/D to be greater than or equal to 0.05, there is sufficient distance between the heat exchanger and the fan, and the position design of the heat exchanger relative to the fan does not affect the near-field airflow of the fan, therefore the aerodynamic noise is reduced and the operating efficiency of the fan is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the embodiments of the present application more clearly, a brief introduction regarding the accompanying drawings that need to be used for describing the embodiments of the present application is given below; the accompanying drawings described as follows are only some embodiments of the present application, other drawings can also be obtained according to the current drawings.

FIG. 1 is a first structural schematic view of an outdoor unit of an air conditioner provided in an embodiment of the present application;

FIG. 2 is a second structural schematic view of an outdoor unit of an air conditioner provided in an embodiment of the present application;

FIG. 3 is a sectional view of an outdoor unit of an air conditioner provided in an embodiment of the present application;

FIG. 4 is a structural schematic view of a fan provided in an embodiment of the present application;

FIG. 5 is a side view of a fan provided in an embodiment of the present application;

FIG. 6 is a structural schematic view of a fan and an air deflector provided in an embodiment of the present application;

FIG. 7 is a first explosive view of a casing provided in an embodiment of the present application;

FIG. 8 is a second explosive view of a casing provided in an embodiment of the present application;

FIG. 9 is a sectional view of a casing being exploded provided in an embodiment of the present application;

FIG. 10 is an enlarged view of a sectional view of a casing provided in an embodiment of the present application;

FIG. 11 is a third explosive view of a casing provided in an embodiment of the present application;

FIG. 12 is a fourth explosive view of a casing provided in an embodiment of the present application;

FIG. 13 is a schematic diagram of an air flow path of a casing provided in an embodiment of the present application;

FIG. 14 is a schematic diagram of a HVAC device provided in an embodiment of the present application.

In the drawings, the reference signs are listed as follows:

• • 1—casing; 11—first housing; 12—second housing; 101—air inlet; 102—air outlet; 2—heat exchanger; 3—fan; 31—blade; 311—tailing edge; 312—outer edge; 313—leading edge; 314—mounting edge; 315—blade tip; 32—central block; 4—air deflector; 41—first flaring portion; 42—second flaring portion; 43—straight barrel section; 44—reinforcing rib; 5—compressor; 6—electric control unit; 61—bottom plate, 62—circuit board; 63—cover portion; 70—outdoor unit; 71—expansion valve; 72—filter; 74—heat source side heat exchanger; 75—air return port; 76 four-way pipe; 5—compressor; 78—gas liquid separator
  • 10—fan unit 10; 103—grille; 104—third mounting hole; 105—air guide channel; 106—upper mounting portion; 107—second mounting hole; 108—side mounting portion; 109—internal concave space;
  • 20—heat exchanger unit;
  • 111—first sidewall portion; 112—support portion; 113—groove portion; 114—groove bottom wall; 115—first groove wall; 116—second groove wall; 117—first fixing hole; 118—first plane; 119—first mounting hole; 120—fourth mounting hole; and
  • 121—second sidewall portion; 122—ventilation sidewall; 123—bottom wall; 124—ventilation hole; 125—bearing surface; 126—second fixing hole.

DETAILED DESCRIPTION OF THE DISCLOSURE

The embodiments of the present application be clearer and more understandable, the present application will be further described in detail below with reference to accompanying figures and embodiments. It should be understood that the embodiments described herein are merely intended to illustrate but not to limit the present application.

It is noted that when a component is referred to as being “fixed to” or “disposed on” another component, it can be directly or indirectly on another component. When a component is referred to as being “connected to” another component, it can be directly or indirectly connected to another component.

In the description of the present application, it needs to be understood that, directions or location relationships indicated by terms such as “length”, “width”, “up”, “down”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, and so on are the directions or location relationships shown in the accompanying figures, which are only intended to describe the present application conveniently and simplify the description, but not to indicate or imply that an indicated device or component must have specific locations or be constructed and manipulated according to specific locations; therefore, these terms shouldn't be considered as any limitation to the present application.

In addition, terms “the first” and “the second” are only used in describe purposes, and should not be considered as indicating or implying any relative importance, or impliedly indicating the number of indicated features. As such, feature(s) restricted by “the first” or “the second” can explicitly or impliedly include one or more such feature(s). In the description of the present application, “a plurality of” means two or more, unless there is additional explicit and specific limitation.

An air conditioner is a type of refrigeration device that cools the air in a room. The air conditioner includes a compressors, a heat exchanger (condenser), a capillary tube, and an evaporator. The outdoor unit of the air conditioner includes a compressor, a heat exchanger and a capillary tube; and the indoor unit of the air conditioner includes a evaporator. The compressor compresses the gaseous refrigerant into a high temperature and high pressure gas, and then transmits the high temperature and high pressure gas to the heat exchanger. The high temperature and high pressure refrigerant is condensed by the heat exchanger and dissipates heat into a low temperature and high pressure refrigerant liquid. At this time, the heat emitted by the refrigerant will be discharged through the outlet of the outdoor unit through the fan. The refrigerant that has become a liquid enters the capillary tube through the pipeline, and is then transported to the evaporator through the throttling of the capillary tube. In the process of throttling to the evaporator, the refrigerant will rapidly absorb heat, the indoor temperature will gradually decrease, and the refrigerant will return to the compressor after heating up, so the cycle works.

The outdoor unit of the air conditioner needs to quickly dissipate the heat of the refrigerant through the fan, therefore, it is necessary to ensure the working efficiency of the fan, and the hot air can be quickly discharged from the outdoor unit of the air conditioner, and then improve the cooling efficiency of the air conditioner. When the outdoor unit of the air conditioner exhausts, the fan works, and the outdoor air enters the outdoor unit of the air conditioner through the heat exchanger; the heat exchanger exchanges heat with the air passing through the heat exchanger. Then, the air that absorbs heat from the heat exchanger is discharged to the outside of the outdoor unit of the air conditioner through the fan. In other words, the internal airflow direction of the outdoor unit of the air conditioner is flowed from the heat exchanger to the fan, and then discharged to the outside of the outdoor unit of the air conditioner. Therefore, the relative position of the heat exchanger and the fan has a great impact on the operating efficiency of the fan.

Especially for a top-outlet type outdoor unit of the air conditioner, the heat exchanger is arranged under the fan, the heat exchanger and the fan are projected on the horizontal surface, the edge of the heat exchanger and is partially overlapped the edge of the fan, when the fan rotates, the heat exchanger will produce a certain near-field airflow interference to the fan, and the fan air efficiency is reduced, the heat cannot be quickly discharged.

The outdoor unit of the air conditioner provided by the embodiment of the present application is described.

As shown in FIGS. 1 to 3, the outdoor unit of the air conditioner includes a casing 1, a heat exchanger 2, and a fan 3.

The casing 1 is the overall support structure of the outdoor unit of the air conditioner. The fan 3 and the heat exchanger 2 are fixed in the interior of the casing 1. The casing 1 is provided with an air inlet 101 and an air outlet 102. When the fan 3 works, the airflow enters the interior of the casing 1 from the air inlet 101 and discharges from the air outlet 102 after passing through the fan 3. The fan 3 is arranged facing the air outlet 102, and a large amount of airflow can pass through the fan 3 and quickly discharges from the air outlet 102.

The fan 3 is provided with a rotating central axis, the fan 3 is rotated around the rotating central axis, and the fan 3 can promote air to flow in the outdoor unit of the air conditioner when it rotates.

The heat exchanger 2 is configured to exchanging heat, the heat exchanger 2 has a refrigerant, when the air flow through the heat exchanger 2, the heat of the refrigerant in the heat exchanger 2 can be taken away by the air flow, and the heat of the refrigerant in the heat exchanger 2 is quickly dispersed. The heat exchanger 2 is arranged around the rotating central axis and the heat exchanger 2 has a large ventilation area and the heat in the heat exchanger 2 can be dissipated more quickly.

In the axial direction of the rotating central axis, the heat exchanger 2 and the fan 3 are spaced apart from each other, and the distance between the heat exchanger 2 and the fan 3 is d, the diameter of the fan 3 is D, and d/D≥0.05, and there is sufficient distance between the heat exchanger 2 and the fan 3, to reduce the influence of the near-field airflow of the heat exchanger 2 onto the fan 3. On the contrary, if the distance between the heat exchanger 2 and the fan 3 is too small, the airflow in the near field of the fan 3 will be affected by the heat exchanger 2, which may increase the aerodynamic noise and affect the air output efficiency. The distance between the heat exchanger 2 and the fan 3 refers to the minimum distance between the heat exchanger 2 and the fan 3, that is, d is the distance between the side of the fan 3 facing the heat exchanger 2 and the side of the heat exchanger 2 facing the fan 3.

The outdoor unit of the air conditioner in above embodiment includes the fan 3, the heat exchanger 2, and the casing 1. The fan 3 provides with the rotating central axis, and the heat exchanger 2 is arranged around the rotating central axis. The distance between the heat exchanger 2 and the fan 3 in the axial direction of the rotating central axis is d, and the diameter of the fan 3 is D. By arranging d/D to be greater than or equal to 0.05, there is sufficient distance between the heat exchanger 2 and the fan 3, and the position design of the heat exchanger 2 relative to the fan 3 does not affect the near-field airflow of the fan 3, therefore the aerodynamic noise is reduced and the operating efficiency of the fan 3 is improved.

In some embodiments of the present application, as shown in FIGS. 1 to 3, the outdoor unit of the air conditioner is a top-outlet type outdoor unit, that is, the air outlet 102 of the casing 1 is arranged on the top thereof, the fan 3 is arranged adjacent to the air outlet 102, and the heat exchanger 2 is arranged below the fan 3 and is arranged around the rotating central axis. After passing through the heat exchanger 2, the air flow passes through the fan 3 and is discharged by the fan 3. That is to say, in the interior of casing 1, the air flow from the bottom to the up. The rotating central axis of the fan 3 is in a vertical direction, and the plane perpendicular to the rotating central axis of the fan 3 is a horizontal plane. The projection of the heat exchanger 2 on the horizontal plane is a closed ring or a ring with a notch, and the projection of the fan 3 on the horizontal plane is located in the heat exchanger 2. If the outer edge of the projection of the fan 3 overlaps with the inner edge of the projection of the heat exchanger 2, then the heat exchanger 2 will produce a certain near-field interference onto the fan 3 on the airflow channel of the indoor unit of the air conditioner, and the larger the overlapping area, the more the heat exchanger 2 will interfere with the fan 3. The stronger the air field interference. Even if the outer edge of the projection of the fan 3 and the inner edge of the projection of the heat exchanger 2 are spaced from each other, and when the distance is small, the heat exchanger 2 will still produce a certain near-field interference onto the fan 3, and the interference degree is relatively smaller.

In some embodiments of the present application, the d/D is arranged to be greater than or equal to 0.05 and less than or equal to 0.1. The smaller the ratio of the d/D, the smaller the distance between the heat exchanger 2 and the fan 3, and the greater the influence of the heat exchanger 2 on the near-field airflow of the fan 3. The greater the ratio of the d/D, the greater the distance between the heat exchanger 2 and the fan 3, but the overall volume of the outdoor unit of the air conditioner will increase, and the packaging cost and transportation cost will be further increased. Therefore, the d/D is arranged to be greater than or equal to 0.05 and less than or equal to 0.1.

In one embodiment, 0.06≤d/D≤0.08, in this way, the heat exchanger 2 can have less impact on the near-field airflow of the fan 3. while the distance between the heat exchanger 2 and the fan 3 will not be too large, resulting in excessive volume of the outdoor unit of the air conditioner. For example, the d/D can be 0.06, 0.067, 0.07, 0.08, and so on.

It should be noted that the larger the diameter D of the fan 3, the greater the range of near-field airflow, the distance d between the heat exchanger 2 and the fan 3 should also be arranged larger, the distance d between the heat exchanger 2 and the fan 3 and the diameter of the fan 3 should be proportional to ensure that the heat exchanger 2 interferes with the near-field air flow of the fan 3. Therefore, by limiting the ratio of the d/D, the airflow influence of the heat exchanger 2 on the fan 3 can be more effectively reduced.

In some embodiments of the present application, as shown in FIG. 3, the distance d of the heat exchanger 2 and the fan 3 in the axial direction of the rotating central axis is greater than or equal to 20 mm and less than or equal to 60 mm. That is to say, the distance d between the heat exchanger 2 and the fan 3 in the vertical direction is greater than or equal to 20 mm, and less than or equal to 60 mm. If the distance d between the heat exchanger 2 and the fan 3 is too small, such as less than or equal to 20 mm, which will lead to the distance between the blades 31 of the fan 3 and the heat exchanger 2 is too close, as long as the projection of the fan 3 on the horizontal plane interferes with the projection of the heat exchanger 2 on the horizontal plane, no matter how to change the diameter of the fan 3, the heat exchanger 2 will produce a certain near-field airflow interference to the fan 3. The distance d between the heat exchanger 2 and the fan 3 is too large, such as greater than or equal to 60 mm, although it can reduce the airflow interference of the heat exchanger 2 to the fan 3, it will cause the overall volume of the outdoor unit of the air conditioner to increase, which is not conducive to the transportation and mounting of the outdoor unit of the air conditioner. Especially when the outdoor unit of the air conditioner is the top air outlet type outdoor unit, the height of the outdoor unit of the air conditioner is generally greater than or equal to the sum of the height of the heat exchanger 2 and d. If d is too large, the height of the outdoor unit of the air conditioner will be correspondingly too large, which is not conducive to the stability of the structure of the outdoor unit of the air conditioner.

In one embodiment, the distance d between the heat exchanger 2 and the fan 3 in the axial direction of the rotating central axis is greater than or equal to 30 mm and less than or equal to 50 mm. In this way, the heat exchanger 2 can have less influence on the near-field airflow of the fan 3, and at the same time, the distance between the heat exchanger 2 and the fan 3 will not be too large, resulting in the volume of the outdoor unit of the air conditioner. For example, the d can be 35 mm, 40 mm, 45 mm, and so on.

In some embodiments of the present application, as shown in FIG. 3, the diameter D of the fan 3 is greater than or equal to 600 mm and less than or equal to 700 mm. The diameter of the fan 3 directly affects the volume of the outdoor unit and the air output efficiency of the fan 3. In some embodiments, the larger the diameter of the fan 3, the larger the volume of the outdoor unit of the air conditioner, the higher the air output efficiency of the fan 3, and the greater the near-field interference of the heat exchanger 2 onto the fan 3. The smaller the diameter of the fan 3, the smaller the volume of the outdoor unit of the air conditioner, the lower the air output efficiency of the fan 3, and the smaller the near-field interference of the heat exchanger 2 onto the fan 3. In order to take into account the small volume of the outdoor unit of the air conditioner, the high air output efficiency of the fan 3 and the small near-field interference of the heat exchanger 2 onto fan 3, the diameter D of the fan 3 is arranged to be greater than or equal to 600 mm and less than or equal to 700 mm.

In one embodiment, the diameter D of the fan 3 is greater than or equal to 630 mm and less than or equal to 670 mm. In this way, the volume of the outdoor unit of the air conditioner can be relatively smaller, the air output efficiency of the fan 3 is relatively higher, and the near-field interference of the heat exchanger 2 onto the fan 3 is smaller. For example, the diameter D of the fan 3 is 640 mm, 650 mm, 660 mm, and so on.

In some embodiments of the present application, as shown in FIG. 3, the heat exchanger 2 and the fan 3 have an axial distance d of 40 mm±5 mm on the rotating central axis, and the diameter D of the fan 3 is 650 mm. The 650 mm is the commonly used diameter D of the fan 3, the size of the fan 3 used in more types of the outdoor units of the air conditioner has a higher air efficiency, the corresponding volume of the outdoor unit of the air conditioner is not too large. In order to make the d/D≥0.05 and further reduce the near-field airflow interference of the heat exchanger 2 on the fan 3, the axial distance d of the heat exchanger 2 and fan 3 on the rotating central axis is arranged to 40 mm±5 mm, such as 38 mm, 39 mm, 40 mm, 42 mm, and so on.

In some embodiments of the present application, as shown in FIGS. 4 and 5, the fan 3 includes blades 31 arranged circumferentially along the rotating central axis. The fan 3 further includes a central block 32, and a root of each of the blades 31 is connected to the central block 32, a drive component such as a motor drives the central block to rotate, to cause each of the blades 31 to rotate. The diameter D of the fan 3 is the diameter of the outer circle of the fan 3, that is, the maximum outer diameter of the fan 3.

In one embodiment, the number of blades 31 is three, four, etc., which are uniformly arranged circumferentially around the central block 32.

Each of the blades 31 is arranged to provide with a curved surface, which has a certain guiding effect on the airflow. When blades 31 are rotated, the airflow is guided through the blades 31, and the airflow flows from one side of the fan 3 to the other side of the fan 3 can continuously transport the airflow inside casing 1 to the outside of casing 1.

Each of the blades 31 is provided with a blade tip 315 arranged away from the air outlet 102. In the axial direction of the fan 3 (the axial direction of the rotating central axis), the central block 32 is located in the central position of the fan 3, the blade tip 315 is located at the edge position of the fan 3, and arranged facing the air outlet 102, and the blade tip 315 can be further extended into the internal space of the casing, and the guiding effect on near-field airflow is stronger, and the efficiency of the fan 3 is higher.

In the axial direction of the rotating central axis, the blade tip 315 is arranged closer to the heat exchanger 2. Therefore, the distance d between the heat exchanger 2 and the fan 3 is the distance d between the blade tip 315 and the heat exchanger 2 in the axial direction of the rotating central axis.

In the embodiment, as shown in FIGS. 4 and 5, the periphery of each of the blades includes a trailing edge 311, an outer edge 312, and a leading edge 313 sequentially connected; the outer edge 312 is more closely fitted to the outer circle of the blade 31 than the other peripheral walls of the blade 31. The end of the trailing edge 311 away from the outer edge 312 and the end of the leading edge 313 away from the outer edge 312 are close to the root of the blade 31, that is, the trailing edge 311 and the leading edge 313 are the radial curves of the blade 31 (more closely fitted with the radial of the blade 31). The joint of the outer edge 312 and the leading edge 313 is the blade tip 315. The outer edge 312 is arranged gradually away from the air outlet 102 from the end of the outer edge 312 connected with the trailing edge 311 to the end of the outer edge 312 connected with the leading edge 313, and the leading edge 313 is arranged gradually away from the outlet 102 from the root of the blade 31 to the end connected with the outer edge 312. In other words, the blade 31 has a change trend from the root to the blade tip 315 that gradually moves away from the air outlet 102, and when the blade 31 rotates, more airflow can be disturbed in the axial direction of the rotation central shaft, thus the air outlet efficiency is higher.

In one embodiment, the periphery of each of the blades further includes a mounting edge 314; the trailing edge 311, the outer edge 312, the leading edge 313 and the mounting edge 314 are connected head to tail in sequence; and the mounting edge 314 is arranged towards the central block 32, and the blade 31 near the mounting edge 314 can be fixed with the central block 32 by screws and other connectors.

In one embodiment, the trailing edge 311 is arranged in a serrated shape to increase the strength of the blade 31 and to reduce the wind resistance of the fan 3.

In some embodiments of the present application, as shown in FIG. 6, the outdoor unit of the air conditioner further includes an air deflector 4, which is arranged around the periphery of the fan 3 to guide the circumference of the fan 3. The air deflector 4 can be fixed in the interior of the casing 1, an air guide space can be defined in the air deflector 4, and the fan 3 is arranged in the air guide space. The air deflector 4 includes a first flaring portion 41, a second flaring portion 42 and a straight barrel section 43 successively connected along the radial direction of the air deflector 4. The first flaring portion 41 and the second flaring portion 42 are arranged at both axial ends of the straight barrel section 43 and are respectively connected with the straight barrel section 43. In the flow direction of the airflow, the first flaring portion 41 extends in the direction close to the central shaft of the air deflector 4, and the second flaring portion 42 extends in the direction away from the central shaft of the air deflector 4. The diameter of the straight barrel section 43 is the same as the minimum diameter of the first flaring section 41 and remains unchanged in the flow direction of the airflow.

In one embodiment, the diameter of the fan 3 is D, and the radial clearance s between the air deflector 4 and the fan 3 is about 0.03D. By arranging above, the noise generated by the fan 3 can be reduced while ensuring the air outlet efficiency of the fan 3, and the practical performance of the fan 3 is greatly improved.

In one embodiment, reinforcing ribs 44 are arranged around the periphery of the air deflector 4 to increase the strength of the air deflector 4. The specific distribution of the reinforcing ribs 44 is not limited here. For example, the reinforcing ribs 44 can be arranged in a vertically and horizontally staggered manner.

In some embodiments of the present application, as shown in FIGS. 1 to 3, the heat exchanger 2 is provided with four heat exchange side surfaces connected sequentially, each of which is provided with condensing tubes, all of which are capable of heat exchange with air. Thus the four heat exchange side surfaces of the heat exchanger 2 can enter the air, and the heat exchange area between the heat exchanger 2 and the air is larger, and the heat in the condensing tubes can be quickly dispersed.

In one embodiment, the four heat exchange side surfaces are arranged surrounding the rotating central axis and form a mounting notch, and an electric control unit 6 is provided at the mounting notch. The electric control unit 6 is located inside the casing 1, and the heat exchanger 2, the fan 3, and other electrical driven mechanisms are electrically connected to the electric control unit 6. The turning on/off of the fan 3, the heat exchanger 2, and other structures can be controlled through the electric control unit 6.

In one embodiment, the electric control unit 6 is located in the internal airflow channel of the outdoor unit of the air conditioner, and the position of the electric control unit 6 will also affect the air output efficiency and aerodynamic noise of the fan 3. The distance between the top of electric control unit 6 and fan 3 is Z, and 0.1≤Z/D≤0.2. By rationally arranging the distance between the electric control unit 6 and the fan 3, the adverse impact of the electric control unit 6 on the outdoor unit of the air conditioner is reduced, and the air loss and noise caused by the electric control unit 6 are reduced.

In one embodiment, the electric control unit 6 is arranged as a rectangular structure, and the length direction of the electric control unit 6 is arranged along the length direction of the casing 1, to reduce the influence of the electric control unit 6 on the ventilation inside the casing 1, and the electric control unit 6 blocks the ventilation channel inside the casing 1 along the width direction. This embodiment proposes to minimize the width of the electric control unit 6, to reduce the impact of electric control unit 6 on the air volume and noise of the fan 3.

In some embodiments of the present application, the heat exchanger 2 is arranged around the rotating central axis, and the shape of the heat exchanger 2 is one of C-type structure, U-type structure, G type structure, L-type structure. For example, the C-type heat exchanger 2 is arranged around the three sides of the casing 1, and the airflow channel inside the casing 1 is also distributed around the internal space of the casing 1, the mounting notch of the C-type heat exchanger 2 is used to mount the electric control unit 6, to reduce the influence of the electric control unit 6 on the airflow after the heat transfer is completed, and the electric control unit 6 is arranged at the mounting notch of the C-type heat exchanger 2. It can also reduce the interference phenomenon between the electric control unit 6 and the C-type heat exchanger 2, and facilitate the assembly and maintenance of the electric control unit 6 and the C-type heat exchanger 2. For example, the G-type heat exchanger 2 is arranged around the four sides of the casing 1, and the airflow channel inside the casing 1 is also distributed around the internal space of the casing 1, the mounting notch of the G-type heat exchanger 2 is used to mount the electric control unit 6, to reduce the influence of the electric control unit 6 on the airflow after the heat transfer is completed, and the electric control unit 6 is arranged in the mounting notch of the G-type heat exchanger 2. It can also reduce the interference phenomenon between the electric control unit 6 and the G-type heat exchanger 2, and facilitate the assembly and maintenance of the electric control unit 6 and the G-type heat exchanger 2.

In some embodiments of the present application, as shown in FIGS. 1 to 3, the casing 1 is a rectangular structure, the air outlet 102 at the top of the casing 1 is a rectangular structure or a circular structure, the air deflector 4 can be a circular structure, and the electric control unit 6 can be located at the corner between the air deflector 4 and the casing 1 by arranging the electric control unit 6 inside the casing 1. In this way, the interference of electric control unit 6 to the airflow channel is minimized, and the ventilation performance and noise reduction ability of the fan 3 are improved.

The four sides of the casing 1 are provided with air inlets 101, the number, distribution and shape of the air inlets 101 on each side of the casing 1 are not limited here, and the airflow can enter the interior of the casing 1 quickly and in large quantities. The heat exchanger 2 can be arranged around the inner wall of the four sides of the casing 1.

In some embodiments of the present application, as shown in FIG. 3, the outdoor unit of the air conditioner also includes a compressor 5, which is fixed at the bottom of the casing 1, and compressor 5 is interconnected with heat exchanger 2.

In some embodiments of the present application, as shown in FIG. 7, the outdoor unit is configured to include a fan unit 10 and a heat exchanger unit 20. The casing 1 includes a first housing 11 and a second housing 12 detachably connected with the first housing 11. In one embodiment, the fan unit 10 includes the first housing 11 and the fan 3 arranged in the first housing 11, the heat exchanger unit 20 includes the second housing 12 and the heat exchanger 2 arranged in the second housing 12. In another embodiment, the fan unit 10 may include a second housing 12 and a fan 3 arranged in a second housing 12, and the heat exchanger unit 20 includes a first housing 11 and a heat exchanger 2 arranged in the first housing 11. Of course, in other embodiments, the fan unit 10 may also be separately arranged outside the first housing 11 and the second housing 12, which is not limited in the present application. In the present application, the first housing 11 and the second housing 12 are arranged and the casing 1 exists in the form of components, and the components can be detachably connected to each other, thus facilitating the assembly and disassembly of the fan unit 10 and the heat exchanger unit 20, as well as the subsequent maintenance of the fan unit 10 and the heat exchanger unit 20.

In some embodiments of the present application, as shown in FIGS. 7 and 8, the first housing 11 includes a first sidewall portion 111 arranged surrounding the rotating central axis, Further, in the present embodiment, due to the openings at both ends of the first sidewall portion 111, the upper opening of the first sidewall portion 111 is constructed to be the air outlet 102, and at the same time, the lower opening of the first sidewall portion 111 is constructed to receive the air after heat exchange by the heat exchanger 2. In the embodiment, the fan 3 may be arranged between the upper opening and the lower opening of the first sidewall portion 111, and then the air after heat exchange by the heat exchanger 2 is guided through the fan 3 to the air outlet 102 and blown out. Further, the fan unit 10 includes a grille 103, the grille 103 is mounted in the upper opening of the first sidewall portion 111, the rear side of the grille 103 is facing the internal space of the first sidewall portion 111, and the fan is mounted below the grille 103. Then the air blown by the fan is guided to the outside of the casing 1 through the grille 103, and the grille 103 is usually equipped with a guide component, and then through the guidance of the guide component, the direction of the air can be controlled in a directional way, to better achieve air circulation and heat exchange.

In some embodiments of the present application, as shown in FIG. 12, the first sidewall portion 111 includes support portions 112; the support portions 112 may be arranged at the first sidewall portion 111 and adjacent to the upper opening, and the support portions 112 are constructed to jointly support the grille 103. In the present embodiment, the support portions 112 may be located in the same first plane 118, the first plane 118 is perpendicular to the rotating central axis, the first plane 118 is lower than the upper edge of the first sidewall portion 111 to form an internal concave space 109, and the grille 103 is received in the internal concave space 109 and is fixed on the support portions 112. Based on this, the grille 103 can be received in the space enclosed by the first sidewall portion 111, and the thickness of the grille 103 may be slightly less than or equal to the height of the internal concave space 109, and when the grille 103 is received in the internal concave space 109, the top surface of the grille 103 is generally flush with the top surface of the first housing 11.

In some embodiments of the present application, as shown in FIG. 9 to FIG. 12, the fan unit 10 also includes an air deflector 4, the inner wall of the air deflector 4 encloses an air guide channel 105 with an upper opening and a lower opening, and an edge of the upper opening of the air guide channel 105 is formed with upper mounting portions 106; the first sidewall portion 111 includes the support portions 112, and the support portions 112 are arranged at the upper opening of the first sidewall portion 111, and the lower sides of the support portions 112 are correspondingly fixed to the upper mounting portions 106. In the present embodiment, each upper mounting portion 106 corresponds to one support portion 112, and first mounting holes are provided on the upper mounting portion 106, and second mounting holes corresponding to the first mounting holes are also provided on the support portion 112, and third mounting holes are provided on the grille 103, the grille 103 is fixed on the support portion 112 by fasteners passing through the first mounting holes, the second mounting holes and the third mounting holes; and the air deflector 4 is fixed on the upper end of the first sidewall portion 111. Based on this, the upper sides of the support portions 112 are constructed to jointly support the grille 103.

In the present embodiment, the upper sides of the support portions 112 are constructed to jointly support the grille 103; the fan is fixed on the lower sides of the support portions 112 and the fan blades the fan 3 are located in the air guide channel 105 and the diameter D of the fan 3 is less than the diameter Dn of the air guide channel 105.

In some embodiments of the present application, as shown in FIGS. 7 and 8, the second housing 12 includes a second sidewall portion 121 arranged surrounding the rotating central axis, which is constructed in a cylindrical configuration provided with an upper opening and a lower opening along the rotating central axis, where the cylindrical configuration is not limited herein, according to actual needs, in other embodiments, the second sidewall portion 121 is constructed in a cylindrical configuration. The second sidewall portion 121 may also be constructed in the form of a rectangular column, a polygonal column, or an irregularly shaped cylinder or column. In one embodiment, the shape of the first sidewall portion 111 and the second sidewall portion 121 are compatible. In the present embodiment, the lower opening of the second sidewall portion 121 is mounted with a bottom wall 123, which supports the heat exchanger 2, and the upper opening of the second sidewall portion 121 is arranged facing the lower opening of the first sidewall portion 111.

In the present embodiment, as shown in FIG. 7 and FIG. 9 to FIG. 10, the housing wall of the first housing 11 is recessed towards an internal concave space to form groove portions 113. In the present embodiment, a groove portion 113 is formed on each side of the first housing 11, and the extension direction of the groove portion 113 may be parallel to the upper or lower end face of the first housing 11. Each groove portion 113 has a groove bottom wall 114 along the recessed direction, a first groove wall 115 connected on the lower side of the groove bottom wall 114, and a second groove wall 116 connected on the upper side of the groove bottom wall 114. During mounting process, the first housing 11 is mounted from top to bottom on the second housing 12, and the upper end of the second housing 12 is inserted into the lower opening of the first housing 11 and the upper end of the second housing 12 is constructed to form a bearing surface 125 to bear the first groove walls 115 of the groove portions 113. That is, when the first housing 11 is fastened on the second housing 12, the wall portion of the upper opening of the second sidewall portion 121 of the second housing 12 is constructed to form a bearing surface 125, which is attached to the first groove walls 115 of the groove portions 113. Based on this, an initial rapid positioning and mounting between the first housing 11 and the second housing 12 is completed.

Further, in the present embodiment, first fixing holes 117 are provided at the lower edge of the first housing 11, and second fixing holes 126 are provided at the upper end of the second housing 12; the first fixing holes 117 and the second fixing holes 126 are in an one-to-one correspondence, and then the fastener passes through the corresponding first fixing hole 117 and the second fixing hole 126, to realize the fixing of the first housing 11 and the second housing 12.

In some embodiments of the present application, as shown in FIG. 10 to FIG. 12, the fan unit 10 also includes an air deflector 4, the inner wall of the air deflector 4 enclosed an air guide channel 105 provided with an upper opening and a lower opening, and the edge of the upper opening of the air deflector 4 is formed with upper mounting portions 106; the first sidewall portion 111 includes support portions 112, and the support portions 112 are arranged at the upper opening of the first sidewall portion 111, and the lower sides of the support portions 112 are correspondingly fixed to the upper mounting portions 106; Each upper mounting portion 106 corresponds to a support portion 112, and first mounting holes 119 may be provided on the upper mounting portion 106, and second mounting holes 107 corresponding to the first mounting holes 119 are also provided on the support portion 112, and the upper part of the air deflector 4 is fixed on the first sidewall portion 111 by fasteners passing through the first mounting holes 119 and the second mounting holes 107.

In the present embodiment, the air deflector 4 is also provided with side mounting portions 108. Side mounting portions 108 may be arranged on the side of the air deflector 4 away from the upper mounting portion 106. At least one fourth mounting hole 120 is arranged on the groove bottom wall 114 of each groove portion 113 on the housing wall of the first housing 11, and the fastener is fixed on the side mounting portion 108 through the fourth mounting hole 120, to realize the fixing of the lower part of the air deflector 4 on the first sidewall portion 111. Combined with the above fixing, the air deflector 4 is fixed on the inner side of the first sidewall portion 111.

In some embodiments of the present application, as shown in FIG. 7 and FIG. 13, the second sidewall portion 121 is provided with a ventilation sidewall 122, which surrounds the outer side of the heat exchanger 3, and the ventilation sidewall 122 is provided with ventilation holes 124, which are arranged corresponding to the heat exchanger 3. As shown in FIG. 13, when the fan unit 10 is working, a motor drives the fan to rotate, and then the air outside the second housing 12 enters the second housing 12 through the ventilation holes 124 on the ventilation sidewall 122. In the process of air entering, the air exchanges heat with the heat exchanger 3, and the air after exchanging heat enters the fan unit 10 from the heat exchanger unit 20. Then the air flows out from the air outlet 102, and the flow direction of the air is shown in FIG. 13.

In some embodiments of the present application, as shown in FIG. 11, the heat exchanger unit 20 further includes an electronic control unit 6, which includes a bottom plate 61, a circuit board 62 mounted on the bottom plate 61, and a cover portion 63 connected to the bottom plate 61 and covering the circuit board 62. The electronic control unit 6 is used to control the operation of the entire outdoor unit of the air conditioner, such as the operation of the fan unit 10, the operation of the heat exchanger, and so on. In the embodiment, the ventilation sidewall 122 is rectangular in shape and forms an opening at the junction of the adjacent sides, the bottom plate 61 covers the opening of the ventilation sidewall 122, and the cover portion 63 is constructed in a complete rectangle with the ventilation sidewall 122. This design facilitates the mounting and protection of the electronic control unit 6 without affecting the integrity of the second housing 12.

The present application further provides a HVAC device, and the HVAC device includes the outdoor unit 70 mentioned above and an indoor unit 80, and the indoor unit 80 and air conditioner outdoor unit 70 are respectively mounted indoors and outdoors. The indoor unit 70 and the outdoor unit 80 are connected through a gas pipe 79 and a liquid pipe 73 to form a refrigerant circulation system.

In some embodiments of the present application, the outdoor unit 70 includes a compressor 5, a heat source side heat exchanger 74 and a gas liquid separator 78; the heat source side heat exchanger 74 is the heat exchanger 2, one end of the heat source side heat exchanger 74 is connected with the exhaust port of the compressor 77, the other end of the heat source side heat exchanger 74 is connected to the liquid pipe 73, one end of the gas liquid separator 78 is connected to the air return port of the compressor 77, and the other end of the gas liquid separator 78 is connected to the gas pipe 79. The indoor unit 80 includes an indoor heat exchanger 81.

In the embodiment, as shown in FIG. 14, the compressor 5 compresses gaseous refrigerant into a high temperature and high pressure gas, and then transports the high temperature and high pressure gas to the heat source side heat exchanger 74. The high temperature and high pressure refrigerant dissipates heat through condensation of the heat source side heat exchanger 74 and becomes refrigerant liquid at low temperature and high pressure; where the heat dissipated by the refrigerant is discharged by the fan 3 through the air outlet 102 of the outdoor unit. The refrigerant that has become a liquid enters the expansion valve 71 through the pipeline, and is then transported to the indoor heat exchanger through the throttling of the expansion valve 71. In the process of throttling to the indoor heat exchanger, the refrigerant will rapidly absorb heat, the indoor temperature will gradually decrease, and the refrigerant will return to the compressor 5 after heating up, so the cycle works. In this process, a filter 72 and a gas-liquid separator 78 can also be arranged between the indoor heat exchanger 81 and the compressor 5. At the same time, a return gas pipe 75 can be arranged in the outlet part of the compressor 5, and the return gas pipe 75 is connected with the four-way pipe 76. In addition, the filter 72 can also be arranged in the outlet direction of the heat exchanger 74; to increase the efficiency of the refrigeration cycle.

The HVAC device provided by the present application adopts the outdoor unit of the air conditioning. The outdoor unit of the air conditioner includes the fan 3, the heat exchanger 2, and the casing 1. The fan 3 provides with the rotating central axis, and the heat exchanger 2 is arranged around the rotating central axis. The distance between the heat exchanger 2 and the fan 3 in the axial direction of the rotating central axis is d, and the diameter of the fan 3 is D. By arranging d/D to be greater than or equal to 0.05, there is sufficient distance between the heat exchanger 2 and the fan 3, and the position design of the heat exchanger 2 relative to the fan 3 does not affect the near-field airflow of the fan 3, therefore the aerodynamic noise is reduced and the operating efficiency of the fan 3 is improved.

The aforementioned embodiments are only embodiments of the present application, and should not be regarded as being limitation to the present application. Any modification, equivalent replacement, improvement, and so on, which are made within the spirit and the principle of the present application, should be included in the protection scope of the present application.

Claims

1. An outdoor unit of an air conditioning, comprising: a casing, provided with an air outlet;a fan, arranged facing the air outlet; anda heat exchanger;wherein the fan is provided with a rotating central axis, and the heat exchanger is arranged around the rotating central axis; a distance d is between the heat exchanger and the fan in an axial direction of the rotating central axis, a diameter D of the fan, and d/D≥0.05.

2. The outdoor unit of the air conditioner according to claim 1, wherein the distance d between the heat exchanger and the fan in the axial direction of the rotating central axis is greater than or equal to 20 mm and less than or equal to 60 mm.

3. The outdoor unit of the air conditioner according to claim 1, wherein the diameter D of the fan is greater than or equal to 600 mm and less than or equal to 700 mm.

4. The outdoor unit of the air conditioner according to claim 1, wherein the distance d between the heat exchanger and the fan in the axial direction of the rotating central axis is greater than or equal to 35 mm and less than or equal to 45 mm, and the diameter D of the fan is 650 mm.

5. The outdoor unit of the air conditioner according to claim 1, wherein the fan comprises a plurality of blades arranged circumferentially along the rotating central axis, each of the plurality of blades is arranged to provide with a curved surface, and each of the plurality of blades is provided with a blade tip arranged away from the air outlet.

6. The outdoor unit of the air conditioner according to claim 5, wherein a distance between the blade tip and the heat exchanger in the axial direction of the rotating central axis is the d.

7. The outdoor unit of the air conditioner according to claim 5, wherein a periphery of each of the plurality of blades comprises a trailing edge, an outer edge, and a leading edge sequentially connected; an end of the trailing edge away from the outer edge and an end of the leading edge away from the outer edge are both arranged adjacent to a root of the blade, and a joint between the outer edge and the leading edge is the blade tip, the outer edge is arranged gradually away from the air outlet in a direction from an end of the outer edge connected to the trailing edge to an end the outer edge connected to the leading edge, and the leading edge is arranged gradually away from the air outlet in a direction from the root of the blade to an end of the leading edge connected to the outer edge.

8. The outdoor unit of the air conditioner according to claim 1, wherein the outdoor unit is configured to comprise a fan unit and a heat exchanger unit, the casing comprises a first housing and a second housing detachably connected with the first housing; the fan unit comprises the first housing and the fan arranged in the first housing, and the heat exchanger unit comprises the second housing and the heat exchanger arranged in the second housing.

9. The outdoor unit of the air conditioner according to claim 8, wherein the first housing comprises a first sidewall portion arranged surrounding the rotating central axis, and the first sidewall portion is configured to be a cylindrical configuration provided with an upper opening and a lower opening along the rotating central axis, the upper opening of the first sidewall portion is configured to be the air outlet, and the lower opening of the first sidewall portion is configured to receive an air after heat exchanging by the heat exchanger.

10. The outdoor unit of the air conditioner according to claim 9, wherein the fan unit comprises a grille, the grille is mounted in the upper opening of the first sidewall portion, a back side of the grille is arranged toward an internal space of the first sidewall portion, and the fan is mounted at a lower side of the grille.

11. The outdoor unit of the air conditioner according to claim 10, wherein the first sidewall portion comprises a plurality of support portions, the plurality of support portions are arranged at the upper opening of the first sidewall portion, and the plurality of support portions are configured to jointly support the grille; and the plurality of the support portions are located in a first plane, the first plane is perpendicular to the rotating central axis, the first plane is arranged lower than an internal concave space formed at an upper edge of the first sidewall portion; and the grille is received in the internal concave space and is fixed on the plurality of the support portions.

12. The outdoor unit of the air conditioner according to claim 10, wherein the fan unit comprises an air deflector, an inner wall of the air deflector surrounds to form an air guide channel provided with an upper opening and a lower opening, and an edge of the upper opening of the air guide channel is formed with a plurality of upper mounting portions; the first sidewall portion comprises a plurality of support portions, the plurality of support portions are arranged at the upper opening of the first sidewall portion, lower sides of the plurality of support portions are respectively fixed on the plurality of the upper mounting portions; and an upper sides of the plurality of support portions are configured to jointly support the grille; andthe fan is fixed to the lower sides of the plurality of support portions, and a plurality of blades of the fan are located in the air guide channel and the diameter D of the fan is less than a diameter Dn of the air guide channel.

13. The outdoor unit of the air conditioner according to claim 10, wherein the second housing comprises a second sidewall portion arranged surrounding the rotating central axis, and the second sidewall portion is configured to be a cylindrical configuration provided with an upper opening and a lower opening, the lower opening of the second sidewall portion is mounted with a bottom wall supporting the heat exchanger, and the upper opening of the second sidewall portion is arranged corresponding to the lower opening of the first sidewall portion.

14. The outdoor unit of the air conditioner according to claim 13, wherein the second sidewall portion is provided with a ventilation sidewall, the ventilation sidewall is arranged surrounding an outer side of the heat exchanger, the ventilation sidewall is provided with a plurality of ventilation holes corresponding to the heat exchanger, the fan unit drives an outside air passing through the plurality of ventilation holes and the heat exchanger to exchange heat, the air after heat exchanging from the heat exchanger unit enters into the fan unit, and exits from the air outlet.

15. The outdoor unit of the air conditioner according to claim 14, wherein the heat exchanger unit further comprises an electronic control unit, the electronic control unit comprises a bottom plate, a circuit board mounted on the bottom plate, and a cover portion connected with the bottom plate and covering the circuit board; and the ventilation sidewall is in a rectangular shape and is provided with an opening formed at a joint of adjacent sides of the ventilation sidewall, the bottom plate covers the opening of the ventilation sidewall, and the cover portion and the ventilation sidewall are constructed into a complete rectangle.

16. The outdoor unit of the air conditioner according to claim 8, wherein a housing wall of the first housing is recessed towards an internal space to form a plurality of groove portions, each of the plurality of groove portions is provided with a groove bottom wall along a recessed direction of the groove portion, a first groove wall connected to a lower side of the groove bottom wall, and a second groove wall connected to an upper side of the groove bottom wall; and the first housing is mounted on the second housing from top to bottom, an upper end of the second housing is inserted into the lower opening of the first housing, and the upper end of the second housing is configured to provide with a bearing surface to bear the first groove wall of each of the plurality of groove portions.

17. The outdoor unit of the air conditioner according to claim 16, wherein a lower edge of the first housing is provided with a plurality of first fixing holes, the upper end of the second housing is provided with a plurality of second fixing holes, and the plurality of first fixing holes correspond to the plurality of the second fixing holes.

18. The outdoor unit of the air conditioner according to claim 17, wherein the fan unit comprises an air deflector, an inner wall of the air deflector surrounds to form an air guide channel provided with an upper opening and a lower opening, an outer side of the air deflector is provided with a plurality of side mounting portions, the groove bottom wall of each of the plurality of groove portions is provided with at least one mounting hole, and the plurality of side mounting portions are respectively fixed in the plurality of mounting holes in an one-to-one correspondence.

19. A HVAC device, comprising: an outdoor unit of an air conditioner and an indoor unit,wherein the outdoor unit comprisesa casing, provided with an air outlet;a fan, arranged facing the air outlet; anda heat exchanger;wherein the fan is provided with a rotating central axis, and the heat exchanger is arranged around the rotating central axis; a distance between the heat exchanger and the fan in an axial direction of the rotating central axis is d, a diameter of the fan is D, and d/D≥0.05; andwherein the indoor unit and the outdoor unit are in communication with each other through a gas pipe and a liquid pipe to form a refrigerant circulation system.

20. The HVAC device according to claim 19, wherein the outdoor unit comprises a compressor, a heat source side heat exchanger and a gas liquid separator, the heat source side heat exchanger is the heat exchanger, an end of the heat source side heat exchanger is connected to an exhaust port of the compressor, an other end of the heat source side heat exchanger is connected to the liquid pipe, an end of the gas liquid separator is connected to an air return port of the compressor, an other end of the gas liquid separator is connected to the gas pipe.