CN112443969A

CN112443969A - Air supply device

Info

Publication number: CN112443969A
Application number: CN201910817065.8A
Authority: CN
Inventors: 陈炜杰; 赵仁壮; 张继勇; 罗伟锦
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: 2019-08-30
Filing date: 2019-08-30
Publication date: 2021-03-05

Abstract

The invention belongs to the field of household appliances, and particularly relates to an air supply device, which comprises: a support body defining an airflow channel through which an airflow passes; the cross-flow wind wheel is rotatably arranged in the airflow channel; a heat generating member including a heat generating portion capable of generating heat, the heat generating member being mounted to the support body and the heat generating portion being disposed inside the cross flow wind wheel; and the driving device is in driving connection with the cross-flow wind wheel so as to drive the cross-flow wind wheel to rotate relative to the support body. According to the air supply equipment provided by the embodiment of the invention, the cross-flow wind wheel sucks external air into the cross-flow wind wheel when rotating, the air is heated by the heating part and then blown out of the cross-flow wind wheel, and the heat emitted by the heating part can be transferred to the cross-flow wind wheel in the modes of heat radiation, heat convection and the like, so that the cross-flow wind wheel also becomes a secondary heat source, the air is heated when entering and blowing out of the cross-flow wind wheel, and the heat efficiency can be obviously improved.

Description

Air supply device

Technical Field

The invention belongs to the field of household appliances, and particularly relates to air supply equipment.

Background

The existing air supply equipment generally realizes air supply through a wind wheel arranged inside a shell, specifically, the continuous rotation of the wind wheel can drive the air inside the shell to form an air flow to be blown out from an air outlet, and meanwhile, the air outside the shell enters from an air inlet to form a supplement air flow. The air supply equipment can be used for cooling or heating, for example, the indoor environment can be cooled when normal-temperature air is blown out, and the indoor environment can be heated when hot air is blown out. To the air supply equipment who possesses the heating function, except that the wind wheel outside still be equipped with heating element (for example heating tube, heater etc.) in the casing inside, some settings of heating element are in air outlet department, and some settings are in air inlet department, no matter set up in air outlet or air intake all can lead to the windage increase to influence the amount of wind and the air supply distance of air-out, and then influence air supply equipment's cooling efficiency or thermal efficiency.

Disclosure of Invention

The invention aims to at least solve the problem of low temperature reduction efficiency or low heat efficiency caused by the influence of a heating component on an air supply device. The purpose is realized by the following technical scheme:

an embodiment of the present invention provides an air supply apparatus, including: a support body defining an airflow channel through which an airflow passes; the cross-flow wind wheel is rotatably arranged in the airflow channel; a heat generating member including a heat generating portion capable of generating heat, the heat generating member being mounted to the support body and the heat generating portion being disposed inside the cross-flow wind wheel; and the driving device is in driving connection with the cross-flow wind wheel so as to drive the cross-flow wind wheel to rotate relative to the support body.

The air supply device comprises a support body, a cross-flow wind wheel and a heating component, wherein the support body defines an airflow channel for airflow to flow through, the cross-flow wind wheel is arranged in the airflow channel, the heating part of the heating component is arranged inside the cross-flow wind wheel, the cross-flow wind wheel of the air supply device can drive air to move in the airflow channel when rotating, specifically, the cross-flow wind wheel sucks the air into the interior, heats the air by the heating part and then blows the air out of the cross-flow wind wheel, because the heat emitted by the heating part can be transferred to the cross-flow wind wheel through heat radiation, heat convection and other modes, the cross-flow wind wheel also becomes a secondary heat source, therefore, air is heated when entering and blowing out of the cross-flow wind wheel, and the air is heated for three times in the process of entering and exiting the cross-flow wind wheel, so that the heat efficiency can be obviously improved. On the other hand, the heating part is arranged inside the cross-flow wind wheel, so that the heating component can avoid an air inlet and an air outlet of the air supply equipment, the wind resistance is obviously reduced, the air supply quantity and the air supply distance of the air supply equipment can be increased, and the heat efficiency (when the meat heating component works) and the cooling efficiency (when the heating component does not work) can be improved to some extent.

In addition, the air supply device according to the embodiment of the invention may further have the following additional technical features:

in some embodiments of the invention, a distance not less than D/70 is left between the heat generating part and the inner wall of the cross-flow wind wheel, wherein D is the diameter of the inner wall of the cross-flow wind wheel.

In some embodiments of the present invention, the heat generating portion is located at a position offset from a central axis of the cross-flow wind wheel.

In some embodiments of the invention, the distance between the heating part and the inner wall of the cross flow wind wheel is greater than or equal to D/5, and the distance between the heating part and the central axis of the cross flow wind wheel is greater than or equal to D/5.

In some embodiments of the present invention, the support body includes two fixing portions, and a first flow guide portion and a second flow guide portion disposed between the two fixing portions, the first flow guide portion and the second flow guide portion define the airflow channel, and an inner side surface of the first flow guide portion is an arc-shaped flow guide surface.

In some embodiments of the present invention, the second guide portion has a first guide surface, a second guide surface and a third guide surface, the first guide surface and the second guide surface form an obtuse angle therebetween, and the second guide surface and the third guide surface form an acute angle therebetween.

In some embodiments of the invention, the obtuse angle ranges from 135 ° or more to 170 ° or less, and the acute angle ranges from 60 ° or more to 90 ° or less.

In some embodiments of the invention, the heat generating portion is a plurality of heat generating portions, and the plurality of heat generating portions are spaced around the central axis.

In some embodiments of the invention, the plurality of heat generating portions are provided on different circumferences formed around the central axis.

In some embodiments of the present invention, the cross-flow wind wheel includes two end plates and a plurality of blades arranged in a circumferential manner between the two end plates, one of the two end plates is a circular plate, the other of the two end plates is an annular plate, and the heat generating portion penetrates into the cross-flow wind wheel from an end where the annular plate is located.

In some embodiments of the invention, the cross-flow wind wheel further includes a rotating shaft, the rotating shaft is fixedly connected and coaxially disposed with the circular plate, and the driving device is in driving connection with the rotating shaft so as to drive the cross-flow wind wheel to rotate relative to the support body through the rotating shaft.

In some embodiments of the present invention, the heat generating member further includes a connection portion through which the heat generating portion is mounted to the support body, and a bearing is provided between the annular plate and the connection portion or a bearing is provided between the annular plate and the support body.

In some embodiments of the present invention, the air supply device further includes a housing, the cross-flow wind wheel is fixed inside the housing through the support, and an air inlet and an air outlet are formed on the housing.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings.

In the drawings:

FIG. 1 is a partially exploded schematic view of an air supply apparatus of an embodiment of the present invention;

FIG. 2 is a schematic structural view of an air supply apparatus according to an embodiment of the present invention (with the housing and the driving device omitted);

FIG. 3 is a front view of an air supply apparatus of an embodiment of the present invention (with the housing and drive means omitted);

fig. 4 is a sectional view taken along a-a in fig. 3 (in the drawing, curved arrows indicate the rotational direction of the cross-flow wind wheel, and hollow arrows indicate the moving direction of the airflow).

The reference symbols in the drawings denote the following:

100: an air supply device;

10: support body, 11: fixing part, 12: first flow guide portion, 13: second flow guide portion, 131: first flow guide surface, 132: second flow guide surface, 133: a third flow guide surface;

20: cross flow wind wheel, 21: end plate, 22: blade, 23: a rotating shaft;

30: heat generating member, 31: heat generation portion, 32: a connecting portion;

40: a drive device;

50: housing, 51: front shell, 52: rear shell, 501: an air outlet;

60: an air flow channel.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 4, an embodiment of the present invention provides an air supply apparatus 100 including a support body 10, a cross-flow wind wheel 20, a heat generating member 30, and a driving device 40. Specifically, the support body 10 defines an airflow passage 60 for passing an airflow, the cross-flow wind wheel 20 is rotatably disposed in the airflow passage 60, the heat generating member 30 includes a heat generating portion 31 capable of generating heat, the heat generating member 30 is mounted on the support body 10 and the heat generating portion 31 is disposed inside the cross-flow wind wheel 20, and the driving device 40 is in driving connection with the cross-flow wind wheel 20 to drive the cross-flow wind wheel 20 to rotate relative to the support body 10.

The air supply device 100 according to the embodiment of the invention comprises a support body 10, a cross-flow wind wheel 20 and a heat generating component 30, wherein the support body 10 defines an airflow channel 60 for airflow to flow through, the cross-flow wind wheel 20 is arranged in the airflow channel 60, a heat generating part 31 of the heat generating component 30 is arranged inside the cross-flow wind wheel 20, the cross-flow wind wheel 20 of the air supply device 100 can drive air to move in the airflow channel 60 when rotating, specifically, the cross-flow wind wheel 20 sucks air into the inside, heats the air by the heat generating part 31 and blows the air out of the cross-flow wind wheel 20, as the heat emitted by the heat generating part 31 can be transferred to the cross-flow wind wheel 20 by means of heat radiation and heat convection, the cross-flow wind wheel 20 itself becomes a secondary heat source, so that the air is heated when entering the cross-flow wind wheel 20 and blowing out the cross-flow wind wheel 20, and therefore, the air is heated three times when entering and exiting, the thermal efficiency can be remarkably improved. On the other hand, the heat generating portion 31 is disposed inside the cross flow wind wheel 20, so that the heat generating member 30 can avoid the air inlet and the air outlet of the air supply device 100, thereby significantly reducing the wind resistance, further increasing the air supply amount and the air supply distance of the air supply device 100, and improving the heat efficiency (when the heat generating member 30 operates) and the cooling efficiency (when the heat generating member does not operate).

In addition, the heating part 31 is arranged inside the cross flow wind wheel 20, and the heating part 31 can be far away from the shell of the air supply device 100, so that the temperature of the shell is reduced, the device can be prevented from burning people, and potential safety hazards are eliminated.

Furthermore, the heat generating portion 31 is provided inside the cross flow wind wheel 20, and space can be saved, so that the external shape of the air supply apparatus 100 can be made smaller.

In addition, the heat generating part 31 is disposed inside the cross flow wind wheel 20, the distance from the housing of the air supply device is increased, the temperature of the outside is also reduced, and compared with the case where the heat generating component is disposed at the air outlet or at the air inlet, the thermal deformation degree of the external material can be significantly reduced, which enables the housing to be made of lower-priced plastic, thereby reducing the product cost.

The heat generating member 30 may or may not generate heat continuously, that is, the user may freely select whether to operate or not operate the heat generating member 30 according to actual needs. However, when the heat generating member 30 does not operate, the air blower 100 may be used as a cooling device such as a fan (for example, a tower fan), and in this case, the air volume is large, the wind speed is high, and the air blowing distance is long.

In some embodiments of the present invention, a distance L not less than D/70 is left between the heat generating portion 31 and the inner wall of the cross-flow wind wheel 20, where D is the diameter of the inner wall of the cross-flow wind wheel 20, and the distance L can ensure that the cross-flow wind wheel 20 can be heated without generating an excessive temperature, so as to ensure that the cross-flow wind wheel 20 does not cause thermal damage, thereby improving the service life of the cross-flow wind wheel 20.

In some embodiments of the present invention, as shown in fig. 4, the heat generating portion 31 is located at a position offset from the central axis of the cross flow wind wheel 20. When the cross flow wind wheel 20 rotates, it will drive a part of air to form a rotational motion, and the air forming the rotational motion will generate an acting force on the air entering the interior of the cross flow wind wheel 20, so that the moving direction of the air entering the interior of the cross flow wind wheel 20 is deflected to a certain extent, and further the airflow is more concentrated at the position deviated from the central axis of the cross flow wind wheel 20, therefore, the heating portion 31 is disposed at the position deviated from the central axis of the cross flow wind wheel 20, that is, the heating portion 31 works at the position where the airflow is more concentrated, and thus the air supply device 100 can have higher thermal efficiency.

In some embodiments of the present invention, a distance L between the heat generating portion 31 and an inner wall of the cross flow wind wheel 20 is greater than or equal to D/5, and a distance L' between the heat generating portion 31 and a central axis of the cross flow wind wheel 20 is greater than or equal to D/5. The distance L 'between the heat generating portion 31 and the central axis of the cross flow wind wheel 20 defines the degree of deviation of the heat generating portion 31 from the center of the cross flow wind wheel 20, the distance L between the heat generating portion 31 and the inner wall of the cross flow wind wheel 20 defines the degree of separation of the heat generating portion 31 from the cross flow wind wheel 20, the distance L and the distance L' jointly define an advantageous arrangement position of the heat generating portion 31, the airflow entering and exiting the cross flow wind wheel 20 is more concentrated at the position, and the heat generating portion 31 is arranged at the position, so that the heat efficiency of the air supply device 100 can be effectively improved.

In some embodiments of the present invention, the support body 10 includes two fixing portions (e.g., fixing plates, fixing blocks, etc.) 11, and a first flow guide portion 12 and a second flow guide portion 13 disposed between the two fixing portions 11, the first flow guide portion 12 and the second flow guide portion 13 defining the airflow channel 60, wherein an inner side surface of the first flow guide portion 12 is an arc-shaped flow guide surface. Wherein, the fixing portion 11 may provide a mounting position for the cross flow wind wheel 20 and the heat generating member 30, and the first flow guide portion 12 and the second flow guide portion 13 may guide the airflow passing through the airflow channel 60. In addition, the inner side surface of the first flow guiding part 12 is an arc-shaped flow guiding surface, and the arc-shaped flow guiding surface can effectively reduce the collision between the air flow and the flow guiding surface while guiding the air flow, so that the energy loss of the air flow is reduced.

In some embodiments of the present invention, the second guide portion 13 has a first guide surface 131, a second guide surface 132 and a third guide surface 133, wherein the first guide surface 131 and the second guide surface 132 form an obtuse angle therebetween, and the second guide surface 132 and the third guide surface 133 form an acute angle therebetween. The second guiding portion 13 has the functions of guiding the flow direction of the airflow and reducing noise, specifically, an obtuse angle between the first guiding surface 131 and the second guiding surface 132 forms a first protruding portion, and an acute angle between the second guiding surface 132 and the third guiding surface 133 forms a second protruding portion, when the airflow in the airflow channel 60 flows, the first protruding portion and the second protruding portion can play a role in resisting air duct resistance and buffering, so that a low-speed area inside the cross-flow wind wheel 20 close to the air suction side is eliminated, and the problem of abnormal sound caused by airflow discontinuity at the air outlet of the airflow channel 60 is eliminated.

Further, the obtuse angle range is equal to or greater than 135 ° and less than 170 °, the acute angle range is equal to or greater than 60 ° and less than 90 °, and the second flow guiding portion 13 can achieve a better noise reduction effect when the angle value range is satisfied.

In some embodiments of the present invention, an acute angle between the first flow guiding surface 131 and the second flow guiding surface 132 and an obtuse angle between the second flow guiding surface 132 and the third flow guiding surface 133 adopt a fillet transition structure, so as to facilitate reducing energy loss of the airflow.

In some embodiments of the present invention, there are a plurality of heat generating portions 31, and the plurality of heat generating portions 31 are distributed at intervals around the central axis of the cross flow wind wheel 20, and the plurality of heat generating portions 31 are provided, which is beneficial to further improve the thermal efficiency of the air supply device 100.

Further, the plurality of heat generating portions 31 may be provided on the same circumference formed around the central axis of the cross flow wind wheel 20, or may be provided on different circumferences formed around the central axis of the cross flow wind wheel 20 (i.e., the distances from the heat generating portions 31 to the central axis of the cross flow wind wheel 20 are not completely equal). When the plurality of heating portions 31 are arranged on different circumferences, on one hand, a heating field with uniform heat distribution is more favorably formed in the tubular wind wheel 20, so that the heating effect of the airflow is improved, and on the other hand, part of the airflow can pass through the heating portions 31 twice, so that the number of times of heating once is increased, and a better heating effect is achieved.

In some embodiments of the present invention, the cross-flow wind wheel 20 includes two end plates 21 and a plurality of blades 22 arranged between the two end plates 21 in a circumferential arrangement, one of the two end plates 21 is a circular plate, the other of the two end plates 21 is an annular plate, and an inner ring of the annular plate can be used as a mounting port, so that the heat generating portion 31 of the heat generating component 30 can enter the cross-flow wind wheel 20 during the mounting process, that is, the heat generating portion 31 penetrates into the cross-flow wind wheel 20 from one end of the annular plate. And one end of the circular plate can be used as the connecting end of the cross flow wind wheel 20 and the driving device 40.

Further, the cross-flow wind wheel 20 further includes a rotating shaft 23, the rotating shaft 23 is fixedly connected and coaxially disposed with the circular plate, and the driving device 40 is drivingly connected with the rotating shaft 23, so that the driving device 40 can drive the cross-flow wind wheel 20 to rotate relative to the support body 10 through the rotating shaft 23.

The driving device 40 is drivingly connected to the rotating shaft 23, and includes a case where the driving device (e.g., a motor) is directly connected to the rotating shaft 23, and a case where the driving device (e.g., a motor) is connected to the rotating shaft 23 through a transmission mechanism (e.g., a gear set, a timing belt, or the like).

In some embodiments of the present invention, the heat generating member 30 further includes a connecting portion 32, the heat generating portion 31 is mounted on the supporting body 10 through the connecting portion 32, the connecting portion 32 may be a mounting seat, and the connection manner between the mounting seat and the supporting body 10 is not limited as long as the heat generating portion 32 can be stably supported.

In some embodiments of the present invention, the connection portion 32 extends into the cross flow wind wheel 20 together with the heat generating portion 31, and in this case, a bearing may be disposed between the annular plate and the support body 10 in order to improve stability of the cross flow wind wheel 20 during rotation.

In other embodiments of the present invention, the connection part 32 is located outside the cross-flow wind wheel 20, and in this case, a bearing may be provided between the annular plate and the connection part 32 in order to improve stability when the cross-flow wind wheel 20 rotates.

Further, the connecting portion 32 may be made of a heat insulating material, so that the heat of the heat generating portion 31 is not transmitted to the supporting body 10, and on the one hand, heat loss is avoided, and on the other hand, the temperature of the case is prevented from being excessively high due to the heat being further transmitted to the case through the supporting body 10.

In some embodiments of the present invention, a bearing is provided between the circular plate and the support body 10, or a bearing is provided between the rotation shaft 23 and the support body 10, so that the cross-flow wind wheel 20 can smoothly and smoothly rotate with respect to the support body 10.

In some embodiments of the present invention, the cross flow wind wheel 20 is made of metal material, so that the cross flow wind wheel 20 has good thermal conductivity, and thus the temperature can be quickly raised when the heat generating portion 31 works, and the heat generating portion becomes a secondary heat source.

In other embodiments of the present invention, the cross-flow wind wheel 20 is made of a high temperature resistant plastic material, so that the cross-flow wind wheel 20 has a light weight, thereby reducing the overall weight of the air supply device. In some embodiments of the present invention, as shown in fig. 1, the air supply device 100 further includes a housing 50, the cross flow wind wheel 20 is fixed inside the housing 50 through a support body 10, an air inlet and an air outlet 501 are formed on the housing 50, and the wind passing through the cross flow wind wheel 20 is finally blown out of the air outlet 501.

Further, the air inlet and the air outlet 501 may be disposed at two opposite sides of the cross flow wind wheel 20, so that the wind enters the inside of the cross flow wind wheel 20 from one side and is blown out from the other side of the cross flow wind wheel 20.

In some embodiments of the present invention, the housing 50 includes a front shell 51 and a rear shell 52, the air inlet is formed in the rear shell 52, the air outlet 501 is formed in the front shell 51, and the front shell 51 and the rear shell 52 are detachably connected, so that the assembly of the air supply device 100 is facilitated, and the housing 50 can be conveniently opened for troubleshooting or maintenance when an internal structure of the air supply device 100 fails. In addition, after the rear shell is disassembled, the wind wheel can be disassembled for cleaning, so that the internal cleaning can be realized, and the secondary pollution is reduced.

In some embodiments of the present invention, the heat-generating component 30 may be a dry-fire electric heating tube, a PTC (positive temperature coefficient) heater, a halogen tube heater, a carbon fiber tube heater, or the like, or any other component capable of generating heat, which is not listed here.

In addition, the present invention is not limited to the above embodiments, for example, the air supply device may be of a balanced type, that is, the cross flow wind wheel is horizontally disposed, the air inlet is located at the lower side (such as the upper casing) of the casing, the air outlet is located at the upper side (such as the lower casing) of the casing, after the power is turned on, the air is heated by the air supply device and rises from the air outlet, and the external cold air naturally sinks and flows into the air inlet for supplement, so as to enhance the active heat exchange efficiency.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An air supply apparatus, comprising:

a support body defining an airflow channel through which an airflow passes;

the cross-flow wind wheel is rotatably arranged in the airflow channel;

a heat generating member including a heat generating portion capable of generating heat, the heat generating member being mounted to the support body and the heat generating portion being disposed inside the cross-flow wind wheel;

and the driving device is in driving connection with the cross-flow wind wheel so as to drive the cross-flow wind wheel to rotate relative to the support body.

2. The air supply apparatus according to claim 1, wherein a distance of not less than D/70 is left between the heat generating portion and an inner wall of the cross-flow wind wheel, wherein D is a diameter of the inner wall of the cross-flow wind wheel.

3. The air supply apparatus of claim 2, wherein the heat generating portion is located at a position offset from a central axis of the cross-flow wind wheel.

4. The air supply equipment of claim 3, wherein the distance between the heating part and the inner wall of the cross-flow wind wheel is greater than or equal to D/5, and the distance between the heating part and the central axis of the cross-flow wind wheel is greater than or equal to D/5.

5. The air supply apparatus according to any one of claims 1 to 4, wherein the support body includes two fixing portions, a first flow guide portion and a second flow guide portion provided between the two fixing portions, the first flow guide portion and the second flow guide portion define the airflow passage, and an inner side surface of the first flow guide portion is an arc-shaped flow guide surface.

6. The air supply apparatus of claim 5, wherein the second deflector portion has a first deflector surface, a second deflector surface, and a third deflector surface, the first deflector surface and the second deflector surface forming an obtuse angle therebetween, and the second deflector surface and the third deflector surface forming an acute angle therebetween.

7. The air supply apparatus according to claim 6, wherein the obtuse angle ranges from 135 ° to 170 °, and the acute angle ranges from 60 ° to 90 °.

8. An air supply arrangement as recited in claim 3 or 4, characterised in that there are a plurality of said heat generating portions, which are spaced apart around said central axis.

9. The air supply apparatus of claim 8, wherein the plurality of heat generating portions are provided on different circumferences formed around the central axis.

10. The air supply apparatus according to any of claims 1 to 4, wherein the cross-flow wind wheel includes two end plates and a plurality of circumferentially arranged blades disposed between the two end plates, one of the two end plates is a circular plate, the other of the two end plates is an annular plate, and the heat generating portion penetrates into the cross-flow wind wheel from an end where the annular plate is located.

11. The air supply apparatus of claim 10, wherein the cross-flow wind wheel further comprises a rotating shaft, the rotating shaft is fixedly connected and coaxially arranged with the circular plate, and the driving device is in driving connection with the rotating shaft so as to drive the cross-flow wind wheel to rotate relative to the support body through the rotating shaft.

12. The air supply apparatus according to claim 11, wherein the heat generating member further includes a connecting portion through which the heat generating portion is attached to the support body, and a bearing is provided between the annular plate and the connecting portion or a bearing is provided between the annular plate and the support body.

13. The air supply equipment according to any one of claims 1 to 4, further comprising a housing, wherein the cross-flow wind wheel is fixed inside the housing through the support body, and the housing is provided with an air inlet and an air outlet.