HANGING NECK FAN

Abstract

The present disclosure provides a hanging neck fan including a housing capable of being worn on a neck; at least two accommodation chambers distributed along an extension direction of the housing and spaced within the housing at interval, each accommodation chamber is provided with a fan assembly, a surface of the housing is provided with an air inlet with a same number as the accommodation chamber. The air inlet is provided on an inner shell or an outer shell of the housing, one side of each accommodation chamber is provided with an air outlet, the air inlet and the air outlet are connected to a corresponding accommodation chamber, the air outlet faces to an impeller on the fan assembly, and at least one end of the air outlet extends within a diameter range of the impeller. The impeller and the accommodation chamber are non-coaxial.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a U.S. patent application which claims the priority and benefit of Chinese Patent Application Number 202322402850.1, filed on Sep. 4, 2023, the disclosure of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of fan technologies, and in particular, to a hanging neck fan.

BACKGROUND

Hanging neck fan is a blowing device that can be worn on a user's neck, which can move with the user and release his hands. By blowing air towards face and neck of the user, it achieves a goal of cooling and dissipating heat.

The hanging neck fan generally includes a housing that can be worn on the neck, and the housing is provided with an accommodation chamber, an air passage, and a fan assembly. The fan assembly is provided in the accommodation chamber, and an outside of the housing is provided with an air inlet and an air outlet. Due to a long distance between the air inlet and the air outlet, the air flow time is long, the resistance is high, the wind force is small, the noise is high, and the blowing effect is poor.

SUMMARY

The present disclosure aims to address the shortcomings of existing technology and provides a neck hanging fan, which adopts a short distance between an air inlet and an air outlet, resulting in a short air flow time, a low resistance, a high wind force, a low noise, and a better blowing effect.

To achieve the above objectives, the present disclosure adopts the following technical solution:

• • a hanging neck fan, including a housing capable of being worn on a neck; at least two accommodation chambers distributed along an extension direction of the housing and spaced within the housing at interval; each accommodation chamber is provided with a fan assembly;
  • a surface of the housing is provided with an air inlet with a same number as the accommodation chamber, the air inlet faces to the accommodation chamber, the air inlet is provided on an inner shell or an outer shell of the housing; one side of each accommodation chamber is provided with an air outlet; the air inlet and air outlet are both connected to a corresponding accommodation chamber, and external air is sucked by the fan assembly into the accommodation chamber from the air inlet and blew out from the air outlet.
  • by providing at least two accommodation chambers at intervals within the housing, there is an air inlet on the surface of the housing that is the same in number as the accommodation chamber. The air inlet faces to the accommodation chamber, and one side of the accommodation chamber is provided with the air outlet. The air inlets and air outlets are connected to the corresponding accommodation chamber, thereby reducing a distance between the air inlet and the air outlet. The fan assembly sucks the external air from the air inlet into the accommodation chamber and blows it out from the air outlet, thereby, a short air flow time, a low resistance, a high wind force, a low noise, and a better blowing effect are achieved. Multiple accommodation chambers are distributed along the extension direction of the housing, allowing multiple positions of the hanging neck fan to simultaneously vent and blow evenly; the air inlet is provided on the inner shell or outer shell of the housing, air blowing at one side, which can reduce noise and improve the use effect while meeting the air volume requirements.

In an embodiment of the present disclosure, the housing includes an arc-shape first housing and an arc-shape second housing; one end of the first housing is provided with a shaft sleeve, and a polygonal shaft hole is provided within the shaft sleeve; one end of the second housing is provided with a circular rotation shaft, and a circumferential outer side wall of the circular rotation shaft is interference-fit with a circumferential inner side wall of the polygonal shaft hole, so that the first housing remains at a certain position when rotating relative to the second housing.

In an embodiment of the present disclosure, both ends of the first housing are provided with the air inlet, the air inlet at one end of the first housing far from the second housing is provided on an inner side wall of the first housing, and the air inlet at one end of the first housing close to the second housing is provided on an outer side wall of the first housing.

In an embodiment of the present disclosure, the air inlet includes multiple air inlet holes that are connected to the accommodation chamber.

In an embodiment of the present disclosure, the fan assembly includes an impeller and a motor driving the impeller to rotate; a central axis of the impeller and a central axis of the accommodation chamber are non-coaxial, and a distance between an outer edge of the impeller and an inner side wall of the accommodation chamber gradually increases along a rotation direction of the impeller.

In an embodiment of the present disclosure, the air outlet faces to the impeller on the fan assembly, and at least one end of the air outlet extends within a diameter range of the impeller.

In an embodiment of the present disclosure, one side of the accommodation chamber close to the air outlet is provided with an inclined air guide plate; one end of the air guide plate extends to an inner side wall of the accommodation chamber, the other end of the air guide plate extends to an end of the air outlet far from a center of the accommodation chamber, and a lower end of the air guide plate is lower than a uppermost end of the impeller.

In an embodiment of the present disclosure, the fan assembly is provided on the inner shell.

A hanging neck fan includes a housing capable of being worn on a neck; at least two accommodation chambers distributed along an extension direction of the housing and spaced within the housing at interval, each accommodation chamber is provided with a fan assembly;

the housing includes a first housing and a second housing, one end of the first housing is provided with a shaft sleeve, a polygonal shaft hole is provided within the shaft sleeve; one end of the second housing is provided with a circular rotation shaft;

a circumferential outer side wall of the circular rotation shaft is interference-fit with a circumferential inner side wall of the polygonal shaft hole, so that the first housing maintains at a certain position when rotating relative to the second housing.

In an embodiment of the present disclosure, an outer side wall of the shaft sleeve is provided with a first connection member, the first connection member is detachably connected to the first housing; an outer side wall of the circular rotation shaft is provided with a second connection member, the second connection member is detachably connected to the second housing.

In an embodiment of the present disclosure, the polygonal shaft hole is a hexagonal shaft hole.

A hanging neck fan includes a housing capable of being worn on a neck; at least two accommodation chambers distributed along an extension direction of the housing and spaced within the housing at interval, each accommodation chamber is provided with a fan assembly;

• • the fan assembly includes an impeller and a motor driving the impeller to rotate, a central axis of the impeller and a central axis of the accommodation chamber are non-coaxial; and a distance between an outer edge of the impeller and an inner side wall of the accommodation chamber gradually increases along a rotation direction of the impeller.

In an embodiment of the present disclosure, a maximum distance between the outer edge of the impeller and the inner side wall of the accommodation chamber is A, a minimum distance between the outer edge of the impeller and the inner side wall of the accommodation chamber is B, and A≥1.5B.

A hanging neck fan includes a housing capable of being worn on a neck; at least two accommodation chambers distributed along an extension direction of the housing and spaced within the housing at interval; each accommodation chamber is provided with a fan assembly, an air outlet faces to an impeller on the fan assembly, and at least one end of the air outlet extends to a diameter range of the impeller.

In an embodiment of the present disclosure, the air outlet is a single air outlet, or an area where air comes out and that is composed by multiple air outlets; one end of the air outlet is within a diameter range of the impeller, and the other end of the air outlet extends out the diameter range of the impeller.

A hanging neck fan includes a housing capably of being worn on a neck and a cover plate surrounding an outer side of the housing; at least two accommodation chambers distributed along an extension direction of the housing and spaced within the housing at interval; each accommodation chamber is provided with a fan assembly; and each accommodation chamber is connected with an air inlet; the air inlet is provide on an outer side wall of the housing; a width C of the cover plate is not less than a diameter D of the air inlet; and an air inlet gap is formed between an inner side wall of the cover plate and the outer side wall of the housing, and the air inlet gap is connected to the air inlet.

In an embodiment of the present disclosure, the cover plate covers at least two air intakes.

In an embodiment of the present disclosure, the cover plate is a single cover plate, which covers the outer side wall of the housing and all air intakes.

In an embodiment of the present disclosure, the cover plate is connected to the housing by a connection member.

The present disclosure has obvious advantages and beneficial effects compared to the prior art. Specifically, by providing at least two accommodation chambers at intervals within the housing, and a surface of the housing is provided with an air inlet with a same number as the accommodation chamber; the air inlet faces to the accommodation chamber, and an air outlet is provided on one side of each accommodation chamber. The air outlet and the air outlet are connected to the corresponding accommodation chamber, thereby reducing a distance between the air inlet and the air outlet, during a process of sucking external air into the accommodation chamber from the inlet and blowing it out from the air outlet, the fan assembly shortens air flow time, reduces resistance, increases wind power, reduces noise, and achieves better blowing effect. Multiple accommodation chambers are distributed along the extension direction of the housing, allowing multiple positions of the hanging neck fan to simultaneously vent and blow evenly; the air inlet is provided on the inner shell or outer shell of the housing, air entering from one side, which can reduce noise and improve the use effect while meeting the air volume requirements.

In order to provide a clearer explanation of the structural features, technical means, and specific objectives and functions achieved by the present disclosure, the following will provide a further detailed explanation of the present disclosure in combination with the drawings and specific embodiments.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram of an assembly structure of a first embodiment of the present disclosure.

FIG. 2 is a decomposition schematic diagram of the first embodiment of the present disclosure.

FIG. 3 is a cross-sectional schematic diagram of the first embodiment of the present disclosure.

FIG. 4 is a side schematic diagram of the first embodiment of the present disclosure after removing an outer shell.

FIG. 5 is a structural schematic diagram of the first embodiment of the present disclosure after removing an inner shell.

FIG. 6 is a connection schematic diagram between a shaft sleeve and a circular rotation shaft in the first embodiment of the present disclosure.

FIG. 7 is a decomposition schematic diagram of the shaft sleeve and circular rotation shaft in the first embodiment of the present disclosure.

FIG. 8 is a cross-sectional schematic diagram of a second embodiment of the present disclosure.

FIG. 9 is a schematic diagram of an assembly structure of a third embodiment of the present disclosure.

FIG. 10 is a front view of the third embodiment of the present disclosure.

FIG. 11 is a decomposition schematic diagram of the third embodiment of the present disclosure.

REFERENCE NUMBER

• • 10—Housing; 101—First housing; 102—Second housing; 11—Inner shell; 12—Outer shell; 13—Accommodation chamber; 14—Air inlet; 141—Air inlet hole; 15—Air outlet; 16—Power supply device; 17—Air guide plate; 20—Fan assembly; 21—Impeller; 22—Motor; 30—Shaft sleeve; 31—Circular rotation shaft; 32—Polygonal shaft hole; 33—First connection member; 34—Second connection member; 35—First installation hole; 40—Cover plate; 41—Air inlet gap.

DETAILED DESCRIPTION

In the description of the present disclosure, it should be noted that the terms “center”, “up”, “bottom”, “left”, “right”, “vertical”, “horizontal”, “inside”, “outside”, etc. indicate that an orientation or a position relationship based on the orientation or position relationship shown in the drawings is only for a convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation of the present disclosure.

In the description of the present disclosure, it should be noted that unless otherwise specified and limited, the terms “installation”, “connection to”, and “connection with” should be understood broadly, for example, they can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a directly connection, or an indirectly connection through an intermediate medium, or it can be an internal connection between two components. For ordinary technical personnel in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific situation.

As shown in FIGS. 1-7, the present disclosure discloses a hanging neck fan. In a first embodiment, the hanging neck fan includes a housing 10 than can be worn on a neck, and at least two accommodation chambers 13 distributed along an extension direction of the housing 10 and spaced within the housing 10 at interval. Specifically, the number of accommodation chamber 13 is four, and each accommodation chamber 13 is provided with a fan assembly 20. The housing 10 is further provided with a power supply device 16, the power supply device 16 is electrically connected to the fan assembly 20, and the fan assembly 20 is provided on an inner shell 11.

A surface of the housing 10 is provided with an air inlet 14 with a same number as the accommodation chamber 13. The air inlet 14 directly faces to the accommodation chamber 13, and the air inlet 14 is provided on the inner shell 11 or the outer shell 12 of the housing 10. One side of each accommodation chamber 13 is provide with an air outlet 15, and the air inlet 14 and the air outlet 15 are connected to a corresponding accommodation chamber 13. Specifically, the air inlet 14 includes multiple air inlet holes 141 connected to the accommodation chamber 13, external air is sucked by the fan assembly 20 into the accommodation chamber 13 from the air inlet 14 and then blew out from the air outlet 15.

The housing 10 includes an arc-shape first housing 101 and an arc-shape second housing 102. One end of the first housing 101 is provided with a shaft sleeve 30, and a polygonal shaft hole 32 is provided within the shaft sleeve 30. Specifically, the polygonal shaft hole 32 is a hexagonal shaft hole. One end of the second housing 102 is provided with a circular rotation shaft 31. A circumferential outer side wall of the circular rotation shaft 31 is interference-fit with a circumferential inner side wall of the polygonal shaft hole 32, so that the first housing 101 maintains at a certain position when rotating relative to the second housing 102. An axis direction of the circular rotation shaft 31 is perpendicular to an extension direction of the first housing 101 and an extension direction of the second housing 102, so that the first housing 101 and the second housing 102 open or close to each other when the first housing 101 and the second housing 102 rotate relative to each other. By providing a shaft sleeve 30 on the first housing 101 and the circular rotation shaft 31 on the second housing 102, a polygonal shaft hole 32 is provided within the shaft sleeve 30, and the circular rotation shaft 31 is interference-fit with the polygonal shaft hole 32, so that the first housing 101 can maintain at a certain position when rotating relative to the second housing 102. And a user can adjust a degree to which the first housing 101 opens or closes relative to the second housing 102 according to needs, and thereby improving a comfort of use.

Both ends of the first housing 101 are provided with the air inlet 14. The air inlet 14 at one end of the first housing 101 that is far away from the second housing 102 is provide on an inner side wall of the first housing 101. The air inlet 14 at one end of the first housing 101 that is close to the second housing 102 is provided on an outer side wall of the first housing 101. Both ends of the second housing 102 are provided with the air inlet 14, the air inlet 14 at one end of the second housing 102 that is far from the first housing 101 is provided on an inner side wall of the second housing 102, and the air inlet 14 at one end of the second housing 102 that is close to the first housing 101 is provided on an outer side wall of the second housing 102.

An outer side wall of the shaft sleeve 30 is provided with a first connection member 33, the first connection member 33 is detachably connected to the first housing 101. An outer side wall of the circular rotation shaft 31 is provided with a second connection member 34, the second connection member 34 is detachably connected to the second housing 102. Specifically, the first connection member 33 is provided with a first installation hole 35, and the first housing 101 is provided with a first connection hole (not shown), a screw is sequentially threaded through the first installation hole 35 and the first connection hole, so that the first connection member 33 can be detachably connected to the first housing 101. An installation mode of the second connection member 34 is the same as that of the first connection member 33, so it will not be repeated. By providing the first connection member 33 and the second connection member 34, the first connection member 33 can be detachably connected to the first housing 101, and the second connection member 34 can be detachably connected to the second housing 102, thereby facilitating the assembly and disassembly of the shaft sleeve 30 and the assembly and disassembly of the circular rotation shaft 31.

The fan assembly 20 includes an impeller 21 and a motor 22 that drives the rotation of the impeller 21. A central axis of the impeller 21 and a central axis of the accommodation chamber 13 are non-coaxial. A distance between an outer edge of impeller 21 and an inner side wall of the accommodation chamber 13 gradually increases along a rotation direction of the impeller 21. A maximum distance between the outer edge of the impeller 21 and the inner side wall of the accommodation chamber 13 is A, a minimum distance between the outer edge of the impeller 21 and the inner side wall of the accommodation chamber 13 is B, and A≥1.5B. By using an eccentric impeller 21, the distance between the outer edge of the impeller 21 and the inner wall of the accommodation chamber 13 gradually increases along the rotation direction of the impeller 21, thereby increasing a space between the outer edge of the impeller 21 and the inner side wall of the accommodation chamber 13. When the impeller 21 rotates, it causes the air to undergo a process of pressurization and acceleration, improving the air gathering effect and air supply effect; it can also prevent the air near the air outlet 15 from flowing back into a narrowest area between the outer edge of the impeller 21 and the inner side wall of the accommodation chamber 13, improving the blowing efficiency; and the best effect is achieved when a minimum distance B is used, A≥1.5B, and distance A refers to a distance between the outer edge of impeller 21 and the inner side wall of the accommodation chamber 13.

The air outlet 15 directly faces to the impeller 21 on the fan assembly 20, and at least one end of the air outlet 15 extends within a diameter range of the impeller 21. Specifically, the air outlet 15 is a single air outlet, or an area where air comes out and that is composed by multiple air outlets; one end of the air outlet 15 is within a diameter range of the impeller 21, and the other end of the air outlet 15 extends out the diameter range of the impeller 21. By providing the air outlet 15 directly facing to the impeller 21 on the fan assembly 20, and at least one end of the air outlet 15 extending to the diameter range of the impeller 21, a distance between the air outlet 15 and the impeller 21 is shortened, resulting in a short path for air to move from the accommodation chamber 13 to the air outlet 15, achieving a direct blowing effect and low energy loss.

One side of the accommodation chamber 13 that is close to the air outlet 15 is provided with an air guide plate 17; one end of the air guide plate 17 extends to an inner side wall of the accommodation chamber 13, and the other end of the air guide plate 17 extends to an end of the air outlet 15 that is far from a center of the accommodation chamber 13, and a lower end of the air guide plate 17 is lower than a uppermost end of the impeller 21. By providing with an inclined air guide plate 17, the air guide plate 17 extends to the air outlet 15, and the lower end of the air guide plate 17 is lower than the uppermost end of the impeller 21, so that a part of the air in the accommodation chamber 13 is directly blown out from the air outlet 15, and other part of air is directed to the air outlet 15 through the air guide plate 17, improving effect and efficiency of blowing air.

As shown in FIG. 8, in a second embodiment of the present disclosure, it differs from the first embodiment in that the fan assembly 20 located at two ends of the housing 10 are both installed on the outer shell 12.

As shown in FIGS. 9-11, in a third embodiment of the present disclosure, it differs from the first and second embodiments in that the hanging neck fan further includes a cover plate 40 surrounding an outer side of the housing 10, and all air inlets 14 are provided on the outer side wall of the housing 10. A width C of the cover plate 40 is not less than a diameter D of the air inlet 14, and an air inlet gap 41 is formed between an inner side wall of the cover plate 40 and an outer side wall of the housing 10, the air inlet gap 41 is connected to the air inlet 14, and the fan assembly 20 sequentially sucks external air from the air inlet gap 41 and the air inlet 14 into the accommodation chamber 13, and then blows it out from the air outlet 15. By providing with a cover plate 40 surrounding the outer side of the housing 10 and proving the air inlet 14 on the outer side wall of the housing 10, the width C of the cover plate 40 is not less than the diameter D of the air inlet 14, and the air inlet gap 41 formed between the cover plate 40 and the housing 10 is connected to the air inlet 14, the cover plate 40 can be used to cover the air inlet 14, preventing a foreign object from directly entering the accommodation chamber 13 through the air inlet 14.

The cover plate 40 covers at least two air inlets 14. Specifically, the cover plate 40 is a single cover plate 40, which covers an outer side wall of all housing 10 and all air inlets 14. The cover plate 40 is in an arc-shape, and an extension direction of the cover plate 40 is the same as that of the housing 10. By using a single cover plate 40, a structure of the cover plate 40 is simpler, and it can be processed and formed in one go, and an assembly is more convenient.

The cover plate 40 can be connected to the housing 10 through a connection member (not shown), the connection member is a connecting rib or a screw.

In summary, the present disclosure provides at least two accommodation chambers 13 distributed within the housing 10 at interval, and on the surface of the housing 10, there is an air inlet 14 with the same number as the accommodation chamber 13. The air inlet 14 directly faces to the accommodation chamber 13, one side of each accommodation chamber 13 is provided with an air outlet 15. The air inlet 14 and the air outlet 15 are connected to a corresponding accommodation chamber 13, thereby reducing a distance between the air inlet 14 and the air outlet 15, during a process of sucking external air from the air inlet 14 into the accommodation chamber 13 and then blowing it out from the air outlet 15, the fan assembly 20 shortens the air flow time, reduces resistance, increases wind power, reduces noise, and achieves a better blowing effect. Multiple accommodation chambers 13 are distributed along an extension direction of the housing 10, allowing multiple positions of the hanging neck fan to simultaneously vent and blow evenly; the air inlet 14 is provided on the inner shell 11 or outer shell 12 of the housing 10, and adopts an air inlet on one side, which can reduce noise and improve the use effect while meeting the air volume requirements.

The above is only a preferred embodiment of the present disclosure and is not intended to limit it. Therefore, any modifications, equivalent substitutions, improvements, etc. made to the above embodiments based on the actual technology of the present disclosure still fall within the scope of the technical solution of the present disclosure.

Claims

1. A neck hanging fan, comprising a housing capable of being worn on a neck; at least two accommodation chambers distributed along an extension direction of the housing and spaced within the housing at interval, each accommodation chamber is provided with a fan assembly; a surface of the housing is provided with an air inlet with a same number as the accommodation chamber, the air inlet faces to the accommodation chamber; the air inlet is provided on an inner shell or an outer shell of the housing; one side of each accommodation chamber is provided with an air outlet; the air inlet and the air outlet are connected to a corresponding accommodation chamber; and external air is sucked by the fan assembly into the accommodation chamber from the air inlet and blew out from the air outlet.

2. The hanging neck fan according to claim 1, wherein the housing comprises an arc-shape first housing and an arc-shape second housing; one end of the first housing is provided with a shaft sleeve, and a polygonal shaft hole is provided within the shaft sleeve; one end of the second housing is provided with a circular rotation shaft, and a circumferential outer side wall of the circular rotation shaft is interference-fit with a circumferential inner side wall of the polygonal shaft hole, so that the first housing remains at a certain position when rotating relative to the second housing.

3. The hanging neck fan according to claim 2, wherein both ends of the first housing are provided with the air inlet, the air inlet at one end of the first housing far from the second housing is provided on an inner side wall of the first housing, and the air inlet at one end of the first housing close to the second housing is provided on an outer side wall of the first housing.

4. The hanging neck fan according to claim 1, wherein the air inlet comprises multiple air inlet holes that are connected to the accommodation chamber.

5. The hanging neck fan according to claim 1, wherein the fan assembly comprises an impeller and a motor driving the impeller to rotate; a central axis of the impeller and a central axis of the accommodation chamber are non-coaxial, and a distance between an outer edge of the impeller and an inner side wall of the accommodation chamber gradually increases along a rotation direction of the impeller.

6. The hanging neck fan according to claim 1, wherein the air outlet faces to the impeller on the fan assembly, and at least one end of the air outlet extends within a diameter range of the impeller.

7. The hanging neck fan according to claim 1, wherein one side of the accommodation chamber close to the air outlet is provided with an inclined air guide plate; one end of the air guide plate extends to an inner side wall of the accommodation chamber, the other end of the air guide plate extends to an end of the air outlet far from a center of the accommodation chamber, and a lower end of the air guide plate is lower than a uppermost end of the impeller.

8. The hanging neck fan according to claim 1, wherein the fan assembly is provided on the inner shell.

9. A hanging neck fan, comprising a housing capable of being worn on a neck; at least two accommodation chambers distributed along an extension direction of the housing and spaced within the housing at interval, each accommodation chamber is provided with a fan assembly; the housing comprises a first housing and a second housing, one end of the first housing is provided with a shaft sleeve, a polygonal shaft hole is provided within the shaft sleeve; one end of the second housing is provided with a circular rotation shaft;a circumferential outer side wall of the circular rotation shaft is interference-fit with a circumferential inner side wall of the polygonal shaft hole, so that the first housing maintains at a certain position when rotating relative to the second housing.

10. The hanging neck fan according to claim 9, wherein an outer side wall of the shaft sleeve is provided with a first connection member, which is detachably connected to the first housing; an outer side wall of the circular rotation shaft is provided with a second connection member, which is detachably connected to the second housing.

11. The hanging neck fan according to claim 9, wherein the polygonal shaft hole is a hexagonal shaft hole.

12. A hanging neck fan, comprising a housing capable of being worn on a neck; at least two accommodation chambers distributed along an extension direction of the housing and spaced within the housing at interval, each accommodation chamber is provided with a fan assembly; the fan assembly comprises an impeller and a motor driving the impeller to rotate, a central axis of the impeller and a central axis of the accommodation chamber are non-coaxial; and a distance between an outer edge of the impeller and an inner side wall of the accommodation chamber gradually increases along a rotation direction of the impeller.

13. The hanging neck fan according to claim 12, wherein, a maximum distance between the outer edge of the impeller and the inner side wall of the accommodation chamber is A, a minimum distance between the outer edge of the impeller and the inner side wall of the accommodation chamber is B, and A≥1.5B.

14. A hanging neck fan, comprising a housing capable of being worn on a neck; at least two accommodation chambers distributed along an extension direction of the housing and spaced within the housing at interval; each accommodation chamber is provided with a fan assembly; and an air outlet faces to an impeller on the fan assembly, and at least one end of the air outlet extends to a diameter range of the impeller.

15. The hanging neck fan according to claim 14, wherein the air outlet is a single air outlet, or an area where air comes out and that is composed by multiple air outlets, one end of the air outlet is within a diameter range of the impeller, and the other end of the air outlet extends out the diameter range of the impeller.

16-19. (canceled)