CN114688054B

CN114688054B - Air supply device

Info

Publication number: CN114688054B
Application number: CN202011623859.XA
Authority: CN
Inventors: 张玮玮
Original assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Environment Appliances Manufacturing Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2023-10-03
Anticipated expiration: 2040-12-31
Also published as: CN114688054A

Abstract

The application discloses an air supply device, which comprises: the volute is provided with an air inlet and an air outlet; the air supply assembly is arranged in the volute; the driving device is arranged to drive the volute to rotate around a set axis, and the set axis penetrates through the air outlet so that the air outlet can circumferentially rotate around the set axis. Therefore, through the cooperation work of the spiral case, the air supply assembly and the driving device, when the spiral case rotates around a set axis, the air supply device can blow out soft surrounding air, the air sense comfortableness of blowing out can be improved, when the spiral case does not rotate, the air supply device can blow out low-noise strong direct air, the temperature can be quickly reduced, the switching of the air blown out by the air supply device between the low-noise strong direct air and the soft surrounding air can be realized, a user can randomly select the air outlet mode of the air supply device according to the use requirement, the problem that the noise of an axial flow fan is higher can be solved, and the problem that the user headache is caused by the air blown out by the centrifugal fan can be also solved.

Description

Air supply device

Technical Field

The application relates to the field of household appliances, in particular to an air supply device.

Background

Most of the existing fans are divided into axial fans and centrifugal fans, when the ambient temperature is high, high wind speed is required for rapid cooling, and when the ambient temperature is low, soft wind is required for enjoying cooling.

In the related art, an axial flow fan controls the air outlet speed of the fan through a high-low gear, noise is high when the axial flow fan works in a high-gear mode, user complains can be caused, and the air outlet area of the axial flow fan is increased through left and right shaking. The centrifugal fan is used for exhausting strong and straight air basically, so that the temperature can be effectively and quickly reduced, and headache of a user is easy to cause after long-time use. It is known that axial fans and centrifugal fans each have drawbacks, and improvements in fans are needed.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present application is to propose a blower device that combines the advantages of both centrifugal and axial fans, so that the volute can achieve a surrounding wind when driven to rotate, and a strong wind when not rotated.

The air supply device according to the present application includes: the volute is provided with an air inlet and an air outlet; the air supply assembly is arranged in the volute; and the driving device is arranged to drive the volute to rotate around a set axis, and the set axis penetrates through the air outlet so that the air outlet can circumferentially rotate around the set axis.

According to the air supply device, when the volute rotates around the set axis, soft surrounding air can be blown out by the air supply device, the comfort of blown air sense can be improved, when the volute does not rotate, low-noise strong straight air can be blown out by the air supply device, and the temperature can be quickly reduced, so that the air blown out by the air supply device can be switched between the low-noise strong straight air and the soft surrounding air, a user can randomly select the air outlet mode of the air supply device according to the use requirement, the problem that the noise of an axial flow fan is higher can be solved, and the problem that the user is headache due to the air blown out by the centrifugal fan can be solved.

In some examples of the present application, the air supply device further includes: the volute is at least partially fixedly arranged in the first shell, a first shell notch is formed in the first shell, and the air outlet is formed in the first shell notch.

In some examples of the present application, the air supply device further includes: the first shell is at least partially arranged in the second shell, the first shell can rotate relative to the second shell, and the first shell notch is exposed from the second shell.

In some examples of the application, the shape of the first housing matches the shape of the second housing.

In some examples of the application, the first housing is configured as a first spherical housing and the second housing is configured as a second spherical housing having a larger diameter than the first spherical housing and having a notch from which a portion of the first housing protrudes outward.

In some examples of the application, the first spherical shell and the second spherical shell are concentrically arranged, and a uniform slit is formed between the first spherical shell and the second spherical shell.

In some examples of the application, a support structure is disposed between the first housing and the second housing.

In some examples of the application, the support structure is configured as a support disc having a concave spherical surface slidingly mated with the outer spherical surface of the first housing.

In some examples of the application, the support structures are disposed at a top and bottom of the first housing, respectively.

In some examples of the present application, the air inlet is disposed on two sides of the volute in the thickness direction of the volute, the air supply assembly corresponds to the air inlet, a first housing through hole is disposed on the first housing at a position corresponding to the air inlet, and a second housing through hole is disposed on the second housing at a position corresponding to the first housing through hole.

In some examples of the application, the first housing through holes are distributed on left and right sides of the first housing, the second housing through holes are distributed on left and right sides of the second housing, and the first housing gap is located at a front portion of the first housing.

In some examples of the present application, a driving shaft is disposed at a rear portion of the first housing, and the driving device is connected to the driving shaft, and the driving device drives the first housing to rotate by driving the first housing to rotate the volute.

In some examples of the present application, the scroll casing includes a first scroll casing and a second scroll casing, the first scroll casing and the second scroll casing are butted in a thickness direction of the scroll casing, a dimension of the first scroll casing in the thickness direction is larger than a dimension of the second scroll casing in the thickness direction, and the air supply assembly is mounted to the first scroll casing.

In some examples of the application, the set axis passes through a center of the air outlet.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of an air supply device according to an embodiment of the present application;

FIG. 2 is another angular schematic view of an air moving device according to an embodiment of the present application;

FIG. 3 is a front view of an air moving device according to an embodiment of the present application;

FIG. 4 is a top view of an air moving device according to an embodiment of the present application;

FIG. 5 is an exploded view of an air moving device according to an embodiment of the present application;

fig. 6 is a cross-sectional view of an air blowing device according to an embodiment of the present application.

Reference numerals:

an air blowing device 100;

a volute 10; an air inlet 11; an air outlet 12; a first volute 13; a second volute 14;

an air supply assembly 20; an impeller 21; a first power driver 22; a motor cover plate 23; a driver mounting portion 24;

a first housing 30; a first housing gap 31; a first housing through hole 32; an air inlet grille 33;

a second housing 40; a second housing through hole 41; a relief hole 42; a first sub-housing 43; a second sub-housing 44;

a slit 50;

a support structure 60; a support disc 61; a concave spherical surface 62; a connecting column 63;

a drive shaft 70; a base 80.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

Referring to fig. 1 to 6, an air supply device 100 according to an embodiment of the present application is described below, and the air supply device 100 may be a fan.

As shown in fig. 1 to 6, an air supply device 100 according to an embodiment of the present application includes: the volute 10, the air supply assembly 20 and the driving device. The volute 10 has an air inlet 11 and an air outlet 12, and air in the external environment can flow into the volute 10 from the air inlet 11, and air in the volute 10 can be blown into the external environment from the air outlet 12. The air supply assembly 20 is disposed in the volute 10, and the driving device is configured to drive the volute 10 to rotate around a set axis, where the air outlet 12 is penetrated through by the set axis, so that the air outlet 12 can rotate circumferentially around the set axis, and it can also be understood that the air outlet 12 rotates around the set axis. When the air blowing unit 20 is operated, the air in the scroll casing 10 can be blown out from the air outlet 12.

When the driving device drives the volute 10 to rotate around the set axis during the operation of the air supply device 100100, the centrifugal force of the air belt blown out from the air outlet 12 can make the air supply device 100 blow out soft surrounding air, so that the comfort of the blown air feeling can be improved, and the user does not feel headache after the air is blown onto the user for a long time. When the ambient temperature is relatively high, the high wind speed is required to be quickly cooled, the driving device does not drive the volute 10 to rotate, the air supply device 100 can blow low-noise strong direct wind, the environment can be quickly cooled, the problem that the noise is high when the axial flow fan works in a high-grade mode can be solved, and therefore complaints of users can be avoided. The arrangement can realize the switching of the wind blown by the air supply device 100 between low-noise strong straight wind and soft surrounding wind, the advantages of the axial flow fan and the centrifugal fan can be integrated on the air supply device 100, and a user can randomly select the air outlet mode of the air supply device 100 according to the use requirement, so that the problem of higher noise of the axial flow fan can be solved, and the problem of headache of the user caused by the wind blown by the centrifugal fan can also be solved.

Therefore, through the cooperation work of the spiral case 10, the air supply assembly 20 and the driving device, when the spiral case 10 rotates around a set axis, the air supply device 100 can blow out soft surrounding air, the air sense comfortableness of blowing out can be improved, when the spiral case 10 does not rotate around the set axis, the air supply device 100 can blow out low-noise strong direct air, the temperature can be reduced rapidly, thereby the switching of the air blown out by the air supply device 100 between the low-noise strong direct air and the soft surrounding air can be realized, a user can randomly select the air outlet mode of the air supply device 100 according to the use requirement, the problem that the noise of an axial flow fan is higher can be solved, and the problem that the air blown out by the centrifugal fan causes headache of the user can be also solved.

In some embodiments of the present application, as shown in fig. 5 and 6, the air supply device 100 may further include: the first casing 30, the volute 10 is at least partially and fixedly arranged in the first casing 30, preferably, all structures of the volute 10 are fixedly arranged in the first casing 30, a first casing notch 31 is formed in the first casing 30, the air outlet 12 can be arranged in the first casing notch 31, the air outlet 12 can be communicated with the first casing notch 31, when the air supply assembly 20 works, air in the volute 10 flows to the first casing notch 31 through the air outlet 12, the first casing notch 31 extends in the front-rear direction of the air supply device 100, and when the air is blown out from the first casing notch 31, the first casing notch 31 has a guiding effect on the air flow, the air flow is facilitated to be blown to a designated position, and the pneumatic loss of the air flow can be reduced.

In some embodiments of the present application, as shown in fig. 1, 4, 5 and 6, the air supply device 100 may further include: the second housing 40, the first housing 30 is at least partially disposed within the second housing 40, and it should be explained that at least a portion of the structure of the first housing 30 is mounted within the second housing 40. The first casing 30 is rotatable relative to the second casing 40, and when the first casing 30 rotates relative to the second casing 40, the air supply device 100 can blow out soft surrounding air, so that the blown-out air feeling comfort can be improved, and the user experience can be improved. The first housing notch 31 is exposed from the second housing 40, and it is also understood that the first housing notch 31 is exposed from the second housing 40, and thus the provision of the first housing notch 31 ensures the blowing of the gas from the first housing notch 31.

In some embodiments of the present application, as shown in fig. 6, the shape of the first housing 30 matches the shape of the second housing 40, and it is also understood that the shape of the first housing 30 is the same or substantially the same as the shape of the second housing 40, so that the following design of the first housing 30 and the second housing 40 can be achieved, and the first housing 30 can be conveniently rotated in the second housing 40 after being mounted in the second housing 40.

In some embodiments of the present application, the first housing 30 may be configured as a first spherical housing, the second housing 40 may be configured as a second spherical housing having a larger diameter than the first spherical housing and a notch, and a portion of the first housing 30 may protrude outward from the notch, and it should be noted that the outer profiles of the first housing 30 and the second housing 40 may be configured as spherical structures, and thus, during the rotation of the first housing 30, the interference between the first housing 30 and the second housing 40 may be avoided, and smooth rotation of the first housing 30 in the second housing 40 may be ensured, thereby ensuring the operational reliability of the air blower 100.

In some embodiments of the present application, as shown in fig. 3, the first spherical housing and the second spherical housing are concentrically arranged, and it should be noted that the center of the first spherical housing and the center of the second spherical housing are located at the same point, and a uniform slit 50 may be formed between the first spherical housing and the second spherical housing, so that the first spherical housing and the second spherical housing are spaced apart, and the first spherical housing and the second spherical housing are concentrically arranged, so that the first spherical housing does not interfere with the second spherical housing when rotating, thereby further ensuring that the first housing 30 rotates smoothly in the second housing 40, and further ensuring the operational reliability of the air supply device 100.

In some embodiments of the present application, as shown in fig. 5 and 6, a support structure 60 may be disposed between the first housing 30 and the second housing 40, the support structure 60 being configured to support the first housing 30, the first housing 30 being rotatable relative to the support structure 60. At least one supporting structure 60 is disposed between the first housing 30 and the second housing 40, preferably, two supporting structures 60 are disposed between the first housing 30 and the second housing 40, so that the first housing 30 can be reliably supported in the second housing 40, interference between the first housing 30 and the second housing 40 can be further avoided, smooth rotation of the first housing 30 can be further ensured, and further, working performance of the air supply device 100 can be ensured.

In some embodiments of the present application, as shown in fig. 5 and 6, the supporting structure 60 may be configured as a supporting disk 61, and the supporting structure 60 may be disposed on the inner surface of the second housing 40 through a connection post 63, that is, the connection post 63 may be connected between the supporting structure 60 and the inner surface of the second housing 40, and the supporting disk 61 has a concave spherical surface 62 slidably matched with the outer spherical surface of the first housing 30, so that the concave spherical surface 62 of the supporting disk 61 and the outer spherical surface of the first housing 30 are configured to follow each other, and the supporting disk 61 may smoothly support the first housing 30, thereby reducing the rotation resistance of the first housing 30, and further making the disposition of the supporting disk 61 more reasonable.

In some embodiments of the present application, as shown in fig. 5 and 6, the supporting structures 60 may be disposed at the top and bottom of the first housing 30, respectively, wherein the supporting structures 60 may be provided in two, one supporting structure 60 is provided at the top inner surface of the second housing 40, the other supporting structure 60 is provided at the bottom inner surface of the second housing 40, the supporting structure 60 at the top inner surface of the second housing 40 supports the top of the first housing 30, and the supporting structure 60 at the bottom inner surface of the second housing 40 supports the bottom of the first housing 30, so that the first housing 30 can be reliably supported in the height direction of the blower device 100, the center of the first housing 30 can be prevented from being deviated from the center of the second housing 40, and thus it can be ensured that the first housing 30 does not interfere with the second housing 40 when rotating.

In some embodiments of the present application, the air inlet 11 may be disposed on two sides of the scroll casing 10 in the thickness direction of the scroll casing 10, the air supply assembly 20 corresponds to the air inlet 11, it should be noted that, the thickness direction of the scroll casing 10 refers to the left-right direction of the air supply device 100 in fig. 3, the air inlet 11 may be disposed on two sides of the scroll casing 10, the air supply assembly 20 corresponds to the air inlet 11 in the left-right direction of the air supply device 100, the first housing 30 may be disposed with a first housing through hole 32 corresponding to the air inlet 11, and the second housing 40 may be disposed with a second housing through hole 41 corresponding to the first housing through hole 32. When the air supply assembly 20 works, external air can be sequentially sucked into the volute 10 from the second shell through hole 41, the first shell through hole 32 and the air inlet 11 under the driving of the air supply assembly 20, so that the air can flow into the volute 10, the arrangement position of the air supply assembly 20 is more reasonable, the arrangement positions of the second shell through hole 41, the first shell through hole 32 and the air inlet 11 are reasonable, and meanwhile, the air inlet 11 is arranged on two side surfaces of the volute 10, so that the air inlet quantity of the air supply device 100 can be ensured, and the air supply requirements of different modes of the air supply device 100 can be met.

In some embodiments of the present application, the first housing through holes 32 may be distributed on the left and right sides of the first housing 30, and the second housing through holes 41 may be distributed on the left and right sides of the second housing 40, so that the first housing through holes 32 and the second housing through holes 41 may be disposed correspondingly, and after the gas flows into the second housing 40 from the second housing through holes 41, a path of the gas flowing into the first housing through holes 32 may be reduced, thereby effectively preventing the gas from forming a vortex between the first housing 30 and the second housing 40, and further preventing the noise of the operation of the blower 100 from increasing. The notch of the second spherical housing is disposed at the front of the second housing 40, and the first housing notch 31 is located at the front of the first housing 30, so that the first housing notch 31 is ensured to be exposed to the second housing 40, and the second housing 40 is ensured to be unable to shield the first housing notch 31, thereby ensuring that the air can be blown from the first housing notch 31 to the external environment, and further ensuring the air blowing effect of the air blowing device 100.

In some embodiments of the present application, a driving shaft 70 may be provided at the rear of the first housing 30, and a driving device may be connected to the driving shaft 70, and the driving device may rotate the first housing 30 by driving the first housing 30 to rotate the scroll casing 10. Wherein, drive arrangement can set up to the second power drive spare, and the second power drive spare can set up to the motor, and drive arrangement during operation, drive arrangement drive shaft 70 drive first casing 30 rotates around setting for the axis, and air supply device 100 blows out soft surrounding wind this moment, and drive arrangement during non-operation, first casing 30 does not rotate, and air supply device 100 blows out low noise strong straight wind this moment to realize the work effect that automatic switch-over air supply device 100 blows out is low noise strong straight wind and soft surrounding wind. Further, the rotation angle and speed of the first housing 30 may be determined according to the actual wind receiving surface and the wind speed and sense of the wind outlet.

In some embodiments of the present application, as shown in fig. 2 and 5, the second housing 40 may be provided with a relief hole 42, and the driving shaft 70 may be penetrated rearward from the relief hole 42, wherein the relief hole 42 may be disposed at a rear side of the second housing 40, and the driving shaft 70 may extend rearward of the blower device 100 from the relief hole 42, so that the driving device may be conveniently connected to the driving shaft 70, assembly difficulty of the driving device and the driving shaft 70 may be reduced, and interference between the driving shaft 70 and the second housing 40 may be avoided. As other alternative embodiments, the inner wall surface of the second housing 40 may be provided with a driving device, i.e. the driving device is hidden inside the second housing 40, for example, the driving device is located at the rear of the spherical first housing 30 and is shielded by the first housing 30, and the driving device may drive the first housing 30 to rotate through a driving shaft at the rear of the first housing 30.

In some embodiments of the present application, as shown in fig. 5, the volute 10 may include: the first scroll casing 13 and the second scroll casing 14 are abutted in the thickness direction of the scroll casing 10, the size of the first scroll casing 13 in the thickness direction of the scroll casing 10 is larger than the size of the second scroll casing 14 in the thickness direction of the scroll casing 10, and the air supply assembly 20 can be installed in the first scroll casing 13. Wherein, the first spiral case 13 can define the installation space, and the air supply subassembly 20 can set up in the installation space to, first spiral case 13 and second spiral case 14 are split type structure, so set up can be convenient for install air supply subassembly 20 in spiral case 10, can promote air supply arrangement 100's assembly efficiency, and also can be convenient for spiral case 10's production.

In some embodiments of the present application, the set axis may pass through the center of the air outlet 12, that is, the set axis is collinear with the center of the air outlet 12, so that the scroll casing 10 can rotate on a predetermined track, which further prevents the first casing 30 from interfering with the second casing 40, thereby ensuring the air supply effect of the air supply device 100.

In some embodiments of the present application, as shown in FIG. 5, the air supply assembly 20 may include: impeller 21 and first power driver 22, first power driver 22 may be configured as a motor, and blower assembly 20 may further include: the motor cover plate 23, the impeller 21 and the motor are assembled together, the motor cover plate 23, the impeller 21 and the first power driving piece 22 are all arranged in the volute 10, the first power driving piece 22 is used for driving the impeller 21 to rotate, wherein when the motor works, the motor drives the impeller 21 to rotate, and when the impeller 21 rotates, wind can be blown out from the air outlet 12.

In some embodiments of the present application, as shown in fig. 5, a driver mounting portion 24 may be disposed within the volute 10, and the first power driver 22 may be disposed at the driver mounting portion 24. Wherein, the driving piece mounting portion 24 may be disposed on the first volute 13 or the second volute 14, preferably, the driving piece mounting portion 24 is disposed on the first volute 13, the first power driving piece 22 may be mounted on the driving piece mounting portion 24 by a bolt, so that the first power driving piece 22 may be reliably mounted on the driving piece mounting portion 24, separation of the first power driving piece 22 from the volute 10 may be avoided, and vibration of the first power driving piece 22 may be reduced, and vibration of the air blower 100 may be reduced. However, the present application is not limited thereto, and the first power driving member 22 may be engaged with the first volute 13.

Further, as shown in fig. 5, an air inlet grille 33 may be disposed at the first housing through hole 32, where the air inlet grille 33 can guide the air during the air flowing into the volute 10 from the first housing through hole 32, so that the air can flow into the volute 10 orderly, thereby avoiding the air from forming a vortex at the first housing through hole 32, and reducing the flow noise of the air at the first housing through hole 32.

In some embodiments of the present application, as shown in fig. 5, the second housing 40 may include: the first sub-housing 43 may define a first sub-mounting cavity, and the second sub-housing 44 may define a second sub-mounting cavity, the first sub-mounting cavity and the second sub-mounting cavity together defining a mounting cavity within which the first housing 30 is disposed. Wherein, first sub-shell 43 and second sub-shell 44 are split type structure, and first sub-shell 43 and second sub-shell 44 can be in the same place through the bolt assembly, and after first sub-shell 43 and second sub-shell 44 are in the same place, first sub-installation chamber and second sub-installation chamber jointly prescribe a limit to the installation chamber, so the setting can be convenient for install first casing 30 in second casing 40, can promote air supply arrangement 100's assembly efficiency to, also can be convenient for the production of second casing 40.

In some embodiments of the present application, a base 80 is provided under the second housing 40, and the base 80 is used to support the second housing 40, so that the air supply device 100 can be stably placed on the ground or a table.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An air blowing device, comprising:

the volute is provided with an air inlet and an air outlet;

the air supply assembly is arranged in the volute; and

the driving device is used for driving the volute to rotate around a set axis, and the set axis penetrates through the air outlet so that the air outlet can circumferentially rotate around the set axis;

the volute is at least partially fixedly arranged in the first shell, a first shell notch is formed in the first shell, and the air outlet is formed in the first shell notch;

a second housing, the first housing being at least partially disposed within the second housing, the first housing being rotatable relative to the second housing, and the first housing gap being exposed from the second housing;

the first housing is configured as a first spherical housing and the second housing is configured as a second spherical housing having a larger diameter than the first spherical housing and having a notch from which a portion of the first housing extends outwardly.

2. The air supply device of claim 1, wherein the shape of the first housing matches the shape of the second housing.

3. The air blowing device of claim 1, wherein the first and second spherical housings are concentrically arranged with uniform slits formed therebetween.

4. The air supply device of claim 1, wherein a support structure is disposed between the first housing and the second housing.

5. The air moving device of claim 4 wherein the support structure is configured as a support tray having a concave spherical surface slidingly mated with the outer spherical surface of the first housing.

6. The air moving device as claimed in claim 4, wherein said supporting structures are disposed at the top and bottom of said first housing, respectively.

7. The air supply device according to claim 1, wherein the air inlet is formed in two side surfaces of the volute in the thickness direction of the volute, the air supply assembly corresponds to the air inlet, a first housing through hole is formed in the first housing at a position corresponding to the air inlet, and a second housing through hole is formed in the second housing at a position corresponding to the first housing through hole.

8. The air supply device of claim 7, wherein the first housing through holes are distributed on left and right sides of the first housing, the second housing through holes are distributed on left and right sides of the second housing, and the first housing gap is located at a front portion of the first housing.

9. The air supply device according to claim 1, wherein a driving shaft is arranged at the rear part of the first housing, the driving device is connected with the driving shaft, and the driving device drives the first housing to rotate by driving the first housing to enable the first housing to drive the volute to rotate.

10. The air supply device according to claim 1, wherein the scroll includes a first scroll and a second scroll, the first scroll and the second scroll are butted in a thickness direction of the scroll, a dimension of the first scroll in the thickness direction is larger than a dimension of the second scroll in the thickness direction, and the air supply assembly is mounted to the first scroll.

11. The air supply device of claim 1, wherein the set axis passes through a center of the air outlet.