Patent Application
20250146678
The present application claims priority under 35 U.S.C. 119 and 35 U.S.C. 365 to Korean Patent Application No. 10-2023-0150716, filed on Nov. 3, 2023, which is hereby incorporated by reference in its entirety.
The present invention relates to a ceiling air conditioner.
An air conditioner is an apparatus for maintaining air of a predetermined space in the most suitable state according to usage or purposes thereof. In general, the air conditioner includes a compressor, a condenser, an expansion device and an evaporator. A freezing cycle for performing compression, condensation, expansion and evaporation of refrigerant may be performed to cool or heat the predetermined space.
The predetermined space may be variously proposed according to where the air conditioner is used. For example, when the air conditioner is positioned in home or office, the predetermined space may be an indoor space of a house or building.
When the air conditioner performs cooling operation, an outdoor heat exchanger provided in an outdoor unit performs a condensation function and an indoor heat exchanger provided in an indoor unit performs an evaporation function. In contrast, when the air conditioner performs heating operation, the outdoor heat exchanger performs a condensation function and the indoor heat exchanger performs an evaporation function.
Depending on the installation location, air conditioners may be classified into upright, wall-mounted, or ceiling types. The upright air conditioner is a type of air conditioner installed to stand in an indoor space, and the wall-mounted air conditioner is understood as a type of air conditioner installed to be attached to a wall. In addition, the ceiling air conditioner is understood as a type of air conditioner installed on a ceiling.
A ceiling air conditioner is a type of air conditioner made for the purpose of air conditioning in an indoor space, and is a product installed on the ceiling of an indoor space. The ceiling air conditioner performs the function of controlling the temperature, humidity, and air quality of the indoor space where it is installed, and includes a heat exchanger with a pipe through which refrigerant flows, a cross-flow fan and a motor that supplies power to rotate it, and a filter for collecting dust, etc.
Like general air conditioners, ceiling air conditioners also have a suction part that suctions air into the product and a discharge port that sends air out of the product. In particular, they are classified into types depending on the number of discharge ports. As an example, there is a ceiling air conditioner (1 Way cassette) equipped with one suction port and one discharge port.
One side of the ceiling air conditioner is exposed to a room, and the other side is buried inside the ceiling. At this time, a part that constitutes a surface of the ceiling air conditioner, which is exposed to the room, is called a front panel.
The ceiling air conditioner has a suction part and a discharge port located in the front panel, which respectively play the role of suctioning or discharging air from the indoor space into the air conditioner. The outside of the suction part of the front panel functions as an exterior design, and a grill is located to protect the internal parts. Inside the grill, a filter that filters out contaminant particles using physical size or electrostatic force.
When the air in the indoor space is suctioned into the product through the suction part, the air passes through the heat exchanger. At this time, the air is heated or cooled through the phase change of the refrigerant flowing inside the heat exchanger. In particular, when cooling occurs, the air is cooled below a dew point, and moisture in the air is condensed in the heat exchanger to form condensate water. To prevent this condensate water from clumping and dripping into the suction part, a drain pan and subdrain that serve as a water catcher are located within the air conditioner.
The air that has been conditioned after passing through the heat exchanger is suctioned into a cross-flow fan, passes between a rear guide and stabilizer, and is finally re-introduced into the indoor space through the discharge part. The ceiling air conditioner provides comfort to users living indoors through the above process.
The present applicant has filed and published an application (hereinafter referred to as prior art) related to a ceiling air conditioner. Information on prior art is as follows.
According to the above prior art, the following problems exist.
First, in the case of a conventional ceiling air conditioner, air suctioned through a suction part of a front panel flows toward a heat exchanger by driving a cross-flow fan. However, since there was no guide member to guide the flow of air flowing toward the heat exchanger, there was a problem in which air flow in an air suction flow path was not smooth.
Second, the air that has passed through the heat exchanger is suctioned into the cross-flow fan and discharged in the radial direction of the cross-flow fan, and the discharged air is discharged to a discharge part of the front panel under the guidance of the rear guide. However, the air discharged from the cross-flow fan was not properly guided by the rear guide, so there was a problem that static pressure loss occurred in the process of flowing to the discharge part. When static pressure loss occurs, the flow rate of the air decreases, which causes a large amount of abnormal noise.
Third, in order to function as an air conditioner, smooth suction and discharge of the cross-flow fan is essential. However, if the suction or discharge part is shielded by structures, contaminants, etc. to increase flow resistance, the internal circulating flow develops significantly and through flow becomes difficult to form. If the degree exceeds a threshold value, the flow is not formed from a suction port to a discharge port. Instead, a ‘surging’ phenomenon occurs in which irregular reverse suction occurs from the discharge port to the cross-flow fan. When the surging phenomenon occurs, strong noise is generated due to the reverse suction flow, which may cause discomfort to the user. Recently, since air conditioners are often equipped with high-density filters with high pressure loss to achieve an air purifying effect, the resistance of the products may be high. For this reason, existing design methods are often vulnerable to the surging phenomenon.
An object of the present invention is to provide a ceiling air conditioner in which air flow on a suction side and air flow on a discharge side of the air conditioner can occur smoothly.
Another object of the present invention is to provide a ceiling air conditioner that can minimize static pressure loss occurring in an air discharge flow path, reduce flow rate loss, and reduce abnormal noise due to static pressure loss.
Another object of the present invention is to provide a ceiling air conditioner that can operate stably without surging even in situations where a suction part is blocked at a certain rate without deteriorating blowing performance or a discharge part is closed so that wind does not flow out smoothly.
A ceiling air conditioner according to an embodiment of the present invention comprises a cross-flow fan extending in a first direction, a case defining an internal space in which the cross-flow fan is mounted, a front panel coupled to the case and having a suction part through which indoor air is suctioned and a discharge part through which air is discharged toward a room, a heat exchanger configured to exchange heat with air suctioned into the case and to partition the internal space into a suction flow path and a discharge flow path, a rear guide installed between the discharge part and the heat exchanger and configured to guide air which has passed through the heat exchanger to the discharge part, and protrusions including at least one protrusion surface and formed on both side surfaces or one side surface defining the discharge part or the discharge flow path to change a length of the discharge flow path in a first direction based on a air discharge direction.
The protrusions reduce a length of the discharge flow path in the first direction based on the air discharge direction.
The protrusions reduce the length of the discharge flow path in the first direction stepwise based on the air discharge direction.
The protrusions comprise at least two surfaces formed to be stepped in the first direction.
The protrusions comprise a first protrusion surface and a second protrusion surface protruding a predetermined height further in the first direction than the first protrusion surface.
The first protrusion surface and the second protrusion surface are formed in parallel.
At least portions of the first protrusion surface and the second protrusion surface are formed to be inclined.
The protrusions are formed on both side surfaces defining the discharge part or the discharge flow path to face each other, and a gap between the first protrusion surfaces is greater than a gap between the second protrusion surfaces.
The protrusions are provided as a separate member and are attached to both side surfaces or one side surface defining the discharge part or the discharge flow path.
The protrusions are integrally formed on both side surfaces or one side surface defining the discharge part or the discharge flow path.
The rear guide comprises a first guide part guiding air which has passed through the heat exchanger to a suction side of the cross-flow fan and a second guide part extending roundly from the first guide part to guide air discharged from the cross-flow fan to the discharge part.
The second guide part is formed with a guide protrusion protruding toward the cross-flow fan and extending long in a longitudinal direction of the cross-flow fan.
A guide jaw protruding toward the suction side of the cross-flow fan is provided between the first guide part and the second guide part.
The ceiling air conditioner may further comprise a filter disposed on a suction side of the heat exchanger, a filter mounting part where the filter is mounted and a control box disposed in the suction flow path and having a built-in PCB.
The ceiling air conditioner according to an embodiment of the present invention having the above configuration has the following effects.
First, there is an advantage in that a suction flow path guide that guides the flow of air suctioned from a suction part of a front panel is provided, allowing smooth flow in the air suction flow path.
Second, there is an advantage that vortex generated in the air suction flow path is suppressed by the suction flow path guide, thereby improving noise and increasing a suction flow rate.
Third, since the suction flow path guide can be stably supported on the inside of the front panel and a PCB device, there is an advantage in that the suction flow path guide can be prevented from falling off or being damaged by the suction pressure of air.
Fourth, the structure of the rear guide that guides the flow of air which has passed through the heat exchanger allows smooth flow in the air discharge flow path. In addition, there is an advantage of minimizing the static pressure loss occurring in the air discharge flow path, reducing flow rate loss, and dramatically reducing abnormal noise due to static pressure loss.
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and a person skilled in the art who understands the spirit of the present invention will be able to easily suggest other embodiments within the scope of the same spirit.
Referring to
Inside the case 100, a plurality of parts may be installed. To this end, the case 100 provides a predetermined internal space 101 and one side thereof may be open. For example, the case 100 may be formed in the shape of a rectangular box.
In detail, the plurality of parts includes a heat exchanger 110 that exchanges heat with air suctioned into the case 100. The heat exchanger 110 extends obliquely upward with respect to the front panel 190 and may be placed on the suction side of a cross-flow fan 120 based on air flow.
The plurality of parts further includes a main drain pan 130 that supports a lower part of the heat exchanger 110 and collects condensate water generated in the heat exchanger 110. The main drain pan 130 may be installed and fixed inside the front panel 190.
The plurality of parts further includes a subdrain pan 140 to prevent condensate water from falling directly downward from a middle portion of the heat exchanger 110. The subdrain pan 140 is disposed between the heat exchanger 110 and the main drain pan 130 to perform a function of assisting water collection to the main drain pan 130.
The plurality of parts further includes a filter mounting part 150 for mounting a filter. The filter mounting part 150 may be formed in the shape of a frame or grill to allow the filter to be mounted and detached. The filter mounting part 150 may be supported by the front panel 190 and the main drain pan 130.
Specifically, the filter mounting part 150 may be formed in the shape of a rectangular frame or grill with an empty interior. The filter mounting part 150 may be formed to be long in the longitudinal direction of the front panel 190, so that the filter may be placed inside.
The plurality of parts further includes a cross-flow fan 120 that is driven to suction and discharge indoor air. The cross-flow fan 120 is formed long in the longitudinal direction of the air conditioner 10.
The cross-flow fan 120 is disposed behind the heat exchanger 110. That is, the heat exchanger 110 is disposed on the suction side of the cross-flow fan 120. Therefore, the air suctioned through the suction part 193 of the front panel 190 exchanges heat through the heat exchanger 110, and the heat-exchanged air passes through the cross-flow fan 120 and is discharged to the discharge part of the front panel 190.
Here, based on the heat exchanger 110, the air flow path from the suction part 193 of the front panel 190 to the heat exchanger 110 is defined as a “suction flow path”, and the air flow path from the heat exchanger 110 to the discharge part 195 of the front panel 190 is defined as a “discharge flow path.”
The plurality of parts further includes a filter disposed inside the suction part 193 of the front panel 190 to filter out foreign substances in the air. Based on the air flow, the filter may be placed on the outlet side of the suction part 193. That is, the filter is disposed on the suction flow path. By attaching or detaching the filter to or from the filter mounting part 150, replacement and management of the filter becomes easy.
The plurality of parts further includes a suction flow path guide to guide the flow of indoor air suctioned through the suction part 193. The suction flow path guide is disposed on the suction flow path. The suction flow path guide functions to guide indoor air suctioned through the suction part 193 to flow smoothly toward the heat exchanger 110.
The plurality of parts further includes a rear guide 180 to guide the flow of indoor air that has passed through the heat exchanger 110. The rear guide 180 is disposed on the discharge flow path. The rear guide 180 functions to guide indoor air that has passed through the heat exchanger 110 to flow smoothly to the discharge part 195 of the front panel 190. To this end, the rear guide 180 is in close contact with the inner surface of the case 100 and is disposed long in the horizontal direction.
In addition, the plurality of parts further includes a control box 20 with a built-in PCB that controls the operation of the air conditioner 10. The control box 20 is installed on the inner side of the case 100. Specifically, the control box 20 is placed on the inner edge of the case 100. In addition, the control box 20 may be placed on the suction flow path.
The front panel 190 is mounted at the lower end of the case 100 and may be formed in a substantially rectangular shape when viewed from below. In addition, the front panel 190 may be formed to protrude further outward than the lower end of the case 100 so that its peripheral portion is in contact with the lower surface of the ceiling.
In detail, the front panel 190 includes a panel body 191 forming the suction part 193 and the discharge part 195, and a suction grill 192 detachably coupled to the suction part 193.
The suction part 193 may be formed long in the horizontal direction on the front part of the front panel 190, and the discharge part 195 may be formed long in the horizontal direction on the rear part of the front panel 190.
The air conditioner 10 further includes a discharge vane 196 that is movably provided on one side of the discharge part 195 to adjust the amount or wind direction of air discharged through the discharge part 195. For example, the discharge vane 196 may be provided to rotate forward and backward about a hinge axis provided at both ends of the discharge vane 196.
Meanwhile, the air conditioner 10 according to the embodiment of the present invention is provided with a rear guide 180 that guides the indoor air that has passed through the heat exchanger 110 to flow smoothly.
In the case of conventional ceiling air conditioners, there was a problem in that indoor air that has passed through the heat exchanger hit the rear guide, generating large abnormal noise. The reason why this abnormal noise occurs is because the conventional rear guide fails to properly guide the flow of air flowing through the discharge side of the cross-flow fan, and as a result, the air flow rate at the end of the rear guide drops, resulting in vortex generation inside the rear guide.
Therefore, the present invention is characterized in that the rear guide that guides indoor air that has passed through the heat exchanger of the air conditioner to flow smoothly toward the discharge part is provided, thereby reducing abnormal noise.
Hereinafter, the rear guide 180 will be described in detail with reference to the drawings. In addition, in the following description, a first direction may mean a direction in which the rotation axis of the cross-flow fan 120 extends.
Referring to
Specifically, the rear guide 180 includes a first guide part 181 that guides air that has passed through the heat exchanger 110 to the suction side of the cross-flow fan 120, and a second guide part 183 that extends roundly from the first guide part 181 and guides the air discharged from the cross-flow fan 120 to the discharge part 195.
The first guide part 181 is formed in the shape of a plate that is formed long in the horizontal direction, and the second guide part 183 may be rounded in an arc shape at an end of the first guide part 181. In addition, the cross-flow fan 120 is located in the inner space formed by the second guide part 183.
Here, the first guide part 181 forms a first discharge flow path through which indoor air that has passed through the heat exchanger 110 flows to the suction side of the cross-flow fan 120, and the second guide part 183 forms a second discharge flow path through which the indoor air discharged from the cross-flow fan 120 flows to the discharge part 195.
That is, the air discharge flow path of the air conditioner 10 includes a first discharge flow path guided by the first guide part 181 and a second discharge flow path guided by the second guide part 183.
A guide jaw 182 is formed on the first guide part 181 to smoothly guide indoor air that has passed through the heat exchanger 110 to the suction side of the cross-flow fan 120. The guide jaw 182 may be formed at a point dividing the first discharge flow path and the second discharge flow path. That is, the guide jaw 182 is provided between the first guide part 181 and the second guide part 183.
Specifically, the guide jaw 182 is formed so that a portion of the inner surface of the first guide part 181 protrudes inward. In addition, the guide jaw 182 protrudes toward the suction side of the cross-flow fan 120 between the first guide part 181 and the second guide part 183. That is, the guide jaw 182 is disposed close to the suction side of the cross-flow fan 120. At this time, the guide jaw 182 forms an inclined surface having a predetermined length.
Therefore, at least some of the indoor air that has passed through the heat exchanger 110 flows along the inner surface of the first guide part 181 and is guided to the suction side of the cross-flow fan 120 by the inclined surface of the guide jaw 182.
In addition, a plurality of guide protrusions 184 are formed on the second guide part 183 to smoothly guide indoor air that has passed through the cross-flow fan 120 toward the discharge part 195.
Specifically, the guide protrusion 184 may be formed to protrude from the second guide part 183. The guide protrusion 184 may extend along the curved surface of the second guide part 183.
The guide protrusions 184 may be provided in plural, spaced apart from each other, and arranged in a direction in which the rear guide 180 extends.
The guide protrusion 184 may be formed on the entire second guide part 183 or only on a portion of the second guide part 183.
In addition, a side cover 170 may be coupled to one or both sides of the rear guide 180.
The side cover 170 may be coupled to the cross-flow fan 120 and a motor 160 that provides rotational power to the cross-flow fan 120.
As an example, in the side cover 170, at least one shaft coupling holes 171 and 172 disposed on both sides of the rear guide 180 and coupled with the rotation axes of the motor 160 and the cross-flow fan 120 may be formed.
In addition, the motor 160 may be disposed outside the side cover 170, and a motor cover 173 coupled to the side cover 170 while covering the motor 160 may be further provided.
In addition, a bearing connected to the rotation axis of the cross-flow fan 120 is disposed on the outside of the side cover 170, and a bearing cover 174 that covers the bearing and is coupled to the side cover 170 may be further provided.
Meanwhile, the air conditioner 10 according to the embodiment of the present invention may form protrusions 200 that protrude inward on both sides defining the discharge part 195.
Here, the discharge part 195 is a component that discharges air that has sequentially passed through the heat exchanger and the discharge flow path to the room, and may mean a discharge port.
The protrusions 200 are provided as a separate member and may be coupled to both sides defining the discharge part 195.
The protrusions 200 have a block shape and may be attached to both sides defining the discharge part 195.
The protrusions 200 may be formed integrally on both sides defining the discharge part 195.
The protrusions 200 may be formed anywhere in the discharge flow path through which air discharged from the cross-flow fan 120 flows.
The discharge flow path may refer to a flow path that guides the air discharged from the cross-flow fan 120 to the discharge part 195.
As an example, the protrusions 200 are integrated with at least one of the rear guide 180, the side cover 170, the main drain pan 130, the front panel 190, or the stabilizer 135, or are provided as separate parts.
For reference, the stabilizer 135 functions to guide the air discharged from the cross-flow fan 120.
The stabilizer 135 functions to prevent the air discharged from the cross-flow fan 120 from being suctioned back into the suction side of the cross-flow fan 120.
The discharge flow path may be partitioned by the stabilizer 135 and the rear guide 180 located opposite the stabilizer 135. The rear guide 180 may be provided to face the stabilizer 135 on the inside of the case 100.
In the following description, the case where the protrusions 200 are provided as separate members will be described as an example, but it should be noted that the scope of the present invention is not limited thereto.
The protrusions 200 are coupled to both sides defining the discharge part 195 to change the area of the discharge flow path.
First, the width of the discharge flow path 195 (left-and-right length based on
In addition, the length of the discharge flow path 195 in the first direction when the protrusion 200 are formed may be shorter than the length of the discharge flow path 195 in the first direction when the protrusions 200 are not formed.
The protrusions 200 may also be understood as a structure that shields both sides of the discharge flow path 195 where a dead zone is formed.
The protrusions 200 may include at least two surfaces formed in a stepped manner.
The protrusions 200 may include three or more surfaces formed in a stepped manner.
The protrusions 200 may include a first protrusion surface 210 and a second protrusion surface 220 that protrudes a predetermined height further than the first protrusion surface 210.
The first protrusion surface 210 and the second protrusion surface 220 may be formed in parallel.
At least one of the first protrusion surface 210 or the second protrusion surface 220 may be formed to be inclined.
At least a portion of the first protrusion surface 210 or the second protrusion surface 220 may be formed to be inclined.
At least one of the first protrusion surface 210 or the second protrusion surface 220 may be formed to be rounded in a curved surface.
At least a portion of the first protrusion surface 210 or the second protrusion surface 220 may be formed to be rounded in a curved surface.
In addition, the protrusions 200 may further include a third protrusion surface that protrudes further than the second protrusion surface, a fourth protrusion surface that protrudes further than the third protrusion surface, and more.
In addition, with the protrusions 200 disposed on both sides, a gap between the first protrusion surfaces 210 (gap in the first direction) may be greater than a gap between the second protrusion surfaces 220 (gap in the first direction).
Therefore, the area of the flow path through which air is discharged based on the air flow direction may be reduced firstly by the first protrusion surface 210 and reduced secondarily by the second protrusion surface 220.
The protrusions 200 may include three or more protrusion surfaces that are formed in a stepped manner.
If the protrusions are disposed on both sides of the discharge part as described above, there is an advantage that a surging phenomenon in which discharged air is re-absorbed at both ends of the discharge part does not occur.
In detail,
Referring to
Hereinafter, the shape of the protrusion 200 will be described in detail.
The thickness of the protrusion 200 may increase based on the direction in which the air is discharged.
For example, the thickness of the protrusion 200 in the left-and-right direction (first direction) may increase based on the direction in which the air is discharged.
Here, the left-and-right direction may mean a direction in which the rotation axis of the cross-flow fan 120 extends.
That is, based on the flow direction of the discharged air, the protrusion 200 has a thickness in the left-and-right direction of a second point (rear end), through which the discharged air passes later, thicker than a thickness in the left-and-right direction of a first point (front end), through which the discharged air passes first.
At this time, the thickness of the protrusion 200 in the left-and-right direction may gradually increase or may increase in steps.
As another example, the thickness of the protrusion 200 in a direction crossing the direction in which the air is discharged may be increased.
As another example, the thickness of the protrusion 200 in the upper-and-lower direction may increase based on the direction in which the air is discharged.
Here, the upper-and-lower direction may mean a direction crossing the rotation axis of the cross-flow fan 120.
That is, based on the flow direction of the discharged air, the protrusion 200 has a thickness of a second point (rear end), through which the discharged air passes later, in the upper-and-lower direction, which is thicker than the thickness of a first point (front end), through which the discharged air passes first, in the upper-and-lower direction.
At this time, the thickness of the protrusion 200 in the upper-and-lower direction may gradually increase or may increase in steps.
In addition, the protrusion 200 includes a first protrusion surface 210 and a second protrusion surface 220 that protrudes a predetermined height further than the first protrusion surface 210, and the exposed area of the first protrusion surface 210 may be less than that of the second protrusion surface 220.
In addition, the protrusion 200 includes a first protrusion surface 210 and a second protrusion surface 220 that protrudes a predetermined height further than the first protrusion surface 210, and at least a portion of the second side surface 240 between the first protrusion surface 210 and the second protrusion surface 220 may be formed to be rounded.
In addition, as shown in
Accordingly, the discharged air may flow smoothly from the first protrusion surface 210 to the second protrusion surface 220.
In addition, as shown in
At this time, the curved surfaces of the first side surface 230 and the second side surface 240 may form a central axis parallel to the rotation axis of the cross-flow fan 120.
In addition, as shown in
In addition, as shown in
In addition, the first side surface 230 of the first protrusion surface 210, the second side surface 240 of the second protrusion surface 220, and the third side surface 260 of the third protrusion surface 250 may be formed to be inclined.
The first protrusion surface 210, the second protrusion surface 220, and the third protrusion surface 250 may each have a stepped shape.
In addition, the protrusion 200 forms a fourth side surface 270 at an end where air is discharged.
The fourth side surface 270 may shield both ends of the discharge part 195.
The fourth side surface 270 does not protrude to the outside of the discharge part 195, but is located inside the discharge part 195.
The length of the fourth side surface 270 in the second direction crossing the first direction may be equal to that of the discharge part 195 in the second direction crossing the first direction.
In addition, the length of the fourth side surface 270 in the first direction may be smaller than the length of the discharge part 195 in the first direction.
In addition, the length of the fourth side surface 270 in the first direction may be smaller than half the length of the discharge part 195 in the first direction.
In addition, the length of the fourth side surface 270 in the first direction may be smaller than half the length of the discharge part 195 in the first direction.
In addition, the length of the fourth side surface 270 in the first direction may be formed by the length of a section where surging occurs on both sides of the discharge part 195 or may be less than the length of the section where surging occurs.
In addition, the protrusion 200 may further include a fifth side surface 280 that contacts the inner surface of the flow path guide 180.
The fifth side surface 280 is formed to correspond to the shape of the inner surface of the flow guide 180.
For example, the fifth side surface 280 may be formed as a curved surface. The curved surface of the fifth side surface 280 may form a central axis parallel to the rotation axis of the cross-flow fan 120.
The protrusions 200 as described above are located on both walls of the discharge part 195 and have a stepped structure.
As described above, when the step-shaped protrusions 200 are provided on both sides of the discharge part 195, the blowing performance of the air conditioner is not reduced, and stable operation is possible without surging even in a case where the suction part is blocked at a certain rate or the discharge part is closed so that the wind does not flow out smoothly.
In detail, in the case of an air conditioner, it is essential to configure the cross-flow fan and flow path to prevent surging by generating stronger pressure even when flow path resistance is high. The flow path of a general cross-flow fan is uniform in the axial direction, so its shape is the same no matter which cross section is compared. However, due to the flow resistance of the wall, the connection structure of the motor and the cross-flow fan, etc., the flow generated by the cross-flow fan is not uniform in the axial direction.
In other words, a region occurs where the flow on the wall side of the discharged air does not have sufficient speed compared to a central region due to resistance. As described above, when the flow resistance increases on the wall of the discharge part, a recirculation region where air is reversely suctioned is likely to be formed around this region, and surging occurs.
The present invention is characterized in that the protrusions 200 are located on the side walls of the air conditioner discharge part 195 and protrude inward, and when viewed from the side of the cross-flow fan 120, the protrusions 200 have a stepped shape.
At this time, the protrusion 200 has a shape in which steps increase in an air discharge direction. The protrusion 200 has a shape in which the flow path width (based on the direction of the rotation axis of the cross-flow fan) is gradually reduced based on the discharge flow generated from the cross-flow fan 120, so that the discharge flow sequentially collides with the stepped first protrusion surface 210 and second protrusion surface 220 to minimize energy loss in the flow due to changes in width, and development of re-suction flow that may occur from the discharge part 195 to the cross-flow fan may be effectively suppressed.
In addition, the protrusion 200 may be formed on only one of the two side surfaces defining the discharge part 195.
In addition, the protrusions 200 may be formed on both side surfaces defining the discharge part 195.
In addition, the protrusion 200 may have a staircase shape by forming a plurality of steps along the air discharge direction.
In addition, the protrusion 200 may be formed to reduce the width or area of the discharge flow path in the air discharge direction.
In addition, the protrusion 200 may be formed to have at least two stepped surfaces when the discharge part 195 is viewed from the center of the cross-flow fan 120.
In addition, at least a portion of the protrusion surface or side surface of the protrusion 200 viewed from the cross-flow fan 120 may be an inclined surface.
In addition, at least a portion of the protrusion surface or side surface of the protrusion 200 viewed from the cross-flow fan 120 may be a curved surface.
This shape further alleviates energy loss due to flow collisions, making it possible to smoother flow pattern changes due to reduction in flow path width.
In addition, the vertical vector of at least one surface of the protrusion 200 viewed from the side of the cross-flow fan 120 and the axial vector of the cross-flow fan 120 may not be perpendicular to each other.
Referring to
In
In addition, the P6 angle in
In addition, in
That is, the airflow discharged from the left side of the discharge part is left airflow, the airflow discharged from the center of the discharge part is central airflow, and the airflow discharged from the right side of the discharge part is right airflow.
Referring to
According to the ceiling air conditioner configured as described above, there is an advantage in that a suction path flow guide that guides the flow of air suctioned from the suction part of the front panel is provided, thereby ensuring a smooth flow in the air suction flow path.
In addition, the suction flow path guide suppresses vortex generated in the air suction flow path, which has the advantage of improving noise and increasing the suction flow rate.
In addition, since the suction flow path guide can be stably supported on the inside of the front panel and the PCB device, there is an advantage in that the suction flow path guide can be prevented from falling off or being damaged due to the suction pressure of air.
In addition, the structure of the rear guide that guides the flow of air which has passed through the heat exchanger allows smooth flow in the air discharge flow path. In addition, there is an advantage of minimizing the static pressure loss occurring in the air discharge flow path, reducing flow rate loss, and dramatically reducing abnormal noise due to static pressure loss.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2023-0150716 | Nov 2023 | KR | national |
