Air supply device and electrical product

Abstract

The embodiment of the present application provides a kind of air supply device and electrical product.The air supply device includes motor, first cover portion, second cover portion and impeller;First cover portion has the wall portion in the radial outer side of motor, wall portion is formed with the first channel communicated in axial;Second cover portion is in contact with first cover portion at one end in axial, and the air inlet is arranged at the other end in axial;Impeller is housed in the space surrounded by first cover portion and second cover portion, and is fixed to the shaft of motor, air supply device further includes the first air duct that the first channel of air inlet, impeller and wall portion are communicated, and the second air duct that is separated from first air duct and is communicated with motor.According to the embodiment of the present application, the heat dissipation performance of air supply device can be enhanced, and good dustproof and waterproof performance is realized, the performance and service life of product are ensured, and market demand is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromechanics, and in particular to an air supply device and an electrical product. BACKGROUND

[0002] Air supply devices are widely used in household appliances, office automation equipment, industrial equipment, etc. An air supply device usually comprises a motor, an impeller, and a housing surrounding the motor and the impeller, the housing being formed with an air inlet, air flowing in from the air inlet flowing through an air duct formed between the impeller and the housing to dissipate heat from the air supply device.

[0003] In some existing structures, the interior of the motor is not in communication with the air duct, and no air flows in the interior of the motor, and the motor dissipates heat only by conduction; in some other existing structures, a through hole is formed in a component surrounding the motor to enable the interior of the motor to be in communication with the air duct, so as to enhance the heat dissipation effect.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical solutions of the present application and for the convenience of understanding by those skilled in the art. The above technical solutions cannot be considered as known to those skilled in the art merely because they are described in the background section of the present application. SUMMARY

[0005] However, the inventors have found that the existing air supply devices have some limitations. For example, for an air supply device dissipating heat only by conduction, the heat dissipation mode is single, and the heat dissipation effect is not ideal, which affects the performance of the motor; and for an air supply device enabling the interior of the motor to be in communication with the air duct, water vapor and dust in the air flowing in from the air inlet are likely to enter the interior of the motor and condense or accumulate in the interior of the motor, which affects the performance and service life of the motor.

[0006] To solve at least one of the above problems or other similar problems, embodiments of the present application provide an air supply device and an electrical product, which enhance the heat dissipation performance of the air supply device, achieve good dustproof and waterproof performance, ensure the performance and service life of the product, and meet market demand.

[0007] According to a first aspect of embodiments of the present application, an air supply device is provided, which comprises:

[0008] a motor having a shaft capable of rotating about a central axis;

[0009] a first cover portion surrounding the motor, the first cover portion having a wall portion located radially outward of the motor, the wall portion being formed with a first passage in communication in the axial direction;

[0010] a second cover portion having an axial one end abutting against the first cover portion and an axial other end provided with an air inlet; and

[0011] a fan wheel accommodated in a space surrounded by the first cover portion and the second cover portion and fixed to the shaft, wherein the air supply device further comprises:

[0012] a first air duct communicating the air inlet, the fan wheel, and the first passage; and

[0013] a second air duct separate from the first air duct and communicating the motor.

[0014] In one or more embodiments, the motor comprises:

[0015] a rotor rotating together with the shaft,

[0016] a stator disposed in radial opposition to the rotor;

[0017] a circuit board electrically connected to coils of the stator; and

[0018] a wiring having one end connected to the circuit board and the other end connected to an external device via the second air duct.

[0019] In one or more embodiments, the wall portion of the first cover portion includes an inner wall and an outer wall spaced apart from the inner wall by a predetermined distance, a space between the inner wall and the outer wall forming the first passage; and the wall portion of the first cover portion is non-curved in an axial direction.

[0020] In one or more embodiments, the wall portion is formed with a second passage communicating an inner side and an outer side of the wall portion and not communicating the first passage, the second passage being used to form the second air duct.

[0021] In one or more embodiments, the second passage is a U-shaped groove recessed in an axial direction from an axial end surface of the wall portion distal from the second cover portion.

[0022] In one or more embodiments, the rotor includes a rotor frame, an outer surface of the rotor frame being provided with a plurality of through-holes.

[0023] In one or more embodiments, a plurality of the through-holes are disposed equidistantly on an end surface of an axial side of the rotor frame.

[0024] In one or more embodiments, a plurality of guide vanes are disposed in a space between the inner wall and the outer wall of the first cover portion; and an end portion of the inner wall on a side closer to the fan wheel is closer to the fan wheel than an end portion of the guide vanes on a side closer to the fan wheel.

[0025] In one or more embodiments, a ratio of a radial width of the guide vane to a diameter of the first cover portion is a value within a predetermined range.

[0026] In one or more embodiments, the other end of the second cover portion has an arc-shaped wall portion extending in a circumferential direction to surround the air inlet, and an end of the impeller close to the air inlet side has an arc-shaped cover plate, at least a portion of the arc-shaped wall portion and a portion of the arc-shaped cover plate are located on a circumference of a same circle as viewed from a shaft cross section of the air supply device.

[0027] In one or more embodiments, an end of the arc-shaped wall portion close to the impeller overlaps an end of the arc-shaped cover plate close to the air inlet in a radial direction.

[0028] In one or more embodiments, the first cover portion further has a bottom portion extending from an inner circumferential surface of an end of the wall portion close to the second cover portion to a radially inner side, and a radially inner side of the bottom portion is formed with a receiving portion around the shaft, and a sealing member is arranged between the receiving portion and the shaft.

[0029] According to a second aspect of the embodiments of the present application, an electrical product is provided, and the electrical product has the air supply device of the first aspect.

[0030] One of the beneficial effects of the embodiments of the present application is that the air supply device includes the first air duct communicating with the air inlet, the impeller, and the first passage formed in the wall portion of the first cover portion, and the second air duct separated from the first air duct and communicating with the motor. Thus, the heat dissipation performance of the air supply device can be enhanced through the first air duct and the second air duct, and the second air duct communicating with the motor is separated from the first air duct, which can inhibit water vapor and dust from entering the interior of the motor, can achieve good waterproof and dustproof performance, and can ensure the performance and service life of the product, and better meet market demand.

[0031] The embodiments of the present application are disclosed in detail in the following description and accompanying drawings. It should be understood that the embodiments of the present application are not limited in scope by the embodiments described below, which are intended as illustrations of one or more aspects of the application. Any equivalent embodiments are intended to be within the scope of the application. Indeed, various modifications of the embodiments in accordance with the

[0032] Features described and / or illustrated with respect to one implementation can be used in the same or similar manner in one or more other implementations, in combination with features of other implementations, or in place of features of other implementations.

[0033] It should be emphasized that the term "comprises / comprising" when used in this specification is taken to mean the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof. BRIEF DESCRIPTION OF DRAWINGS

[0034] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0035] Figure 1 is a schematic view of a first cover part of the air supply device according to an embodiment of the present application;

[0036] Figure 2 is a schematic view of a first cover part of the air supply device according to an embodiment of the present application;

[0037] Figure 3 is a schematic view of a first cover part of the air supply device according to an embodiment of the present application;

[0038] Figure 4 is a schematic view of a first cover part of the air supply device according to an embodiment of the present application;

[0039] Figure 5 is a schematic view of a first cover part of the air supply device according to an embodiment of the present application;

[0040] Figure 6 is a schematic view of a first cover part of the air supply device according to an embodiment of the present application;

[0041] Figure 7 is a schematic view of a first cover part of the air supply device according to an embodiment of the present application. DETAILED DESCRIPTION

[0042] The foregoing and other features of the present application will become more apparent from the following detailed description considered in conjunction with the accompanying drawings. It is to be understood that the following description is exemplary of the principles of the present application. Various and other embodiments of the present application can be realized and attained by the structure and combination of parts depicted in the enclosed figures, which will become more fully apparent after reading this description.

[0043] In the embodiments of the present application, the term "and / or" includes any one and all combinations of the associated listed terms. The terms "comprise", "include", "contain", "have" and the like mean the presence of stated features, elements, components or assemblies, but do not exclude the presence or addition of one or more other features, elements, components or assemblies.

[0044] In the embodiments of the present application, the singular forms "a," "an," and "the" can include the plural forms, should be construed broadly as "one" or "a type of" rather than the meaning of "one", and the term "the" should be construed as including both the singular and the plural forms unless the context clearly indicates otherwise. In addition, the term "according to" should be construed as "at least partially according to", and the term "based on" should be construed as "at least partially based on" unless the context clearly indicates otherwise.

[0045] In addition, in the following description of the present application, for the convenience of description, the direction extending along the axis of the motor or the direction parallel thereto is referred to as "axial direction", the radial direction centered on the axial direction is referred to as "radial direction", and the direction around the axial direction is referred to as "circumferential direction". It is to be noted, however, that these are only for the convenience of description and do not limit the orientation of the motor and the air blowing device during manufacture and use.

[0046] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0047] Embodiments of the first aspect

[0048] The embodiments of the first aspect of the present application provide an air blowing device.

[0049] Figure 1 is a schematic view of an air blowing device according to an embodiment of the first aspect of the present application, showing a case where the air blowing device is viewed from one side (O side) in the axial direction; Figure 2 is another schematic view of the air blowing device according to the embodiment of the first aspect of the present application, showing a case where the air blowing device is viewed from the other side (O' side) in the axial direction; Figure 3 is a cross-sectional schematic view of the air blowing device according to the embodiment of the first aspect of the present application.

[0050] As shown in Figures 1 to 3 , the air blowing device 10 includes a motor 101, a first cover portion 102, a second cover portion 103, and an impeller 104. The motor 101 has a shaft 1011 rotatable around a center axis OO'; the first cover portion 102 surrounds the motor 101, the first cover portion 102 having a wall portion 1021 located radially outward of the motor 101, the wall portion 1021 being formed with a first passage 1022 communicating in the axial direction; the second cover portion 103 has an axial one end (O end) abutting against the first cover portion 102, and an axial other end (O' end) provided with an air inlet 1031; and the impeller 104 is housed in a space surrounded by the first cover portion 102 and the second cover portion 103, and is fixed to the shaft 1011.

[0051] As shown in Figure 3As shown, the air supply device 10 further comprises a first air duct W1 and a second air duct W2, the first air duct W1 is in communication with the air inlet 1031, the impeller 104 and the first channel 1022 formed in the wall portion 1021, and the second air duct W2 is separated from the first air duct W1 and in communication with the motor 101.

[0052] As can be seen from the above embodiment, the air supply device 10 comprises the first air duct W1 in communication with the air inlet 1031, the impeller 104 and the first channel 1022, and the second air duct W2 in communication with the motor 101 and separated from the first air duct W1. Thus, the heat dissipation performance of the air supply device 10 can be enhanced through the first air duct W1 and the second air duct W2, and the second air duct W2 in communication with the motor 101 is separated from the first air duct W1, which can inhibit the gas mixed with water vapor and / or dust sucked from the air inlet of the first air duct from invading the interior of the motor 101, and good waterproof and dustproof performance can be achieved, the performance and service life of the product are ensured, and the market demand is better met.

[0053] In one or more embodiments, as Figure 3 As shown, the motor 101 further has a rotor 1012, a stator 1013, a circuit board 1014 and a wiring 1015. The rotor 1012 rotates together with the shaft 1011, the stator 1013 is arranged opposite to the rotor 1012 in the radial direction, the circuit board 1014 is electrically connected with the coil of the stator 1013, one end of the wiring 1015 is connected with the circuit board 1014, and the other end of the wiring 1015 is connected with an external device via the second air duct W2. Thus, the wiring 1015 drawn from the interior of the motor 101 is connected with the external device via the second air duct W2 separated from the first air duct W1, and compared with the structure that the wiring is drawn from the first air duct, the embodiment of the present application is beneficial to realize the dry-wet separation structure of the whole machine.

[0054] In the embodiment of the present application, the motor 101 can further have other components, such as bearings, etc., which can be referred to related technologies. In addition, Figure 3 The motor shown is an external rotor motor, but the present application is not limited thereto, and the motor can also be an internal rotor motor, or other types of motors, which are not limited by the present application.

[0055] In the embodiments of the present application, the air supply device 10 is used in combination with other devices, which are client devices, for example, a vacuum cleaner device. The other devices can be devices other than the air supply device 10 in the vacuum cleaner device, or components assembled with the air supply device 10 in the vacuum cleaner device, which can guide the air discharged from the air supply device 10 to the outside of the device. In addition, the external devices connected with the wiring can be devices other than the air supply device 10 in the vacuum cleaner device, or components assembled with the air supply device 10 in the vacuum cleaner device, such as a control circuit, a power interface, and the like of the vacuum cleaner device. It is worth noting that the above is exemplarily described by taking the vacuum cleaner device as an example, and the present application is not limited thereto, but can be any device assembled with the air supply device 10.

[0056] In the embodiments of the present application, the air supply device 10 can be assembled with other devices through the mounting portion 105 provided on the wall portion 1021 of the first cover portion 102, as shown in Figures 1 to 3 In addition, the air supply device 10 can be assembled and positioned through the positioning portion 106, as shown in Figure 2 The specific embodiments of the mounting portion 105 and the positioning portion 106 are not limited in the present application, and can be referred to related technologies.

[0057] In one or more embodiments, as shown in Figure 3 and Figure 7 The wall portion 1021 of the first cover portion 102 includes an inner wall 1021I and an outer wall 1021O spaced apart from the inner wall 1021I by a predetermined distance, and a space between the inner wall 1021I and the outer wall 1021O forms the first channel 1022. Thus, the first channel can be formed in a substantially entire circumferential range, and the flow efficiency of the air in the first channel can be improved. However, the present application is not limited thereto, and the first channel 1022 can also have other embodiments, for example, a plurality of holes penetrating in the axial direction can be formed in the wall portion 1021 to form the first channel. In the embodiments of the present application, a plurality of first channels 1022 can be formed between the inner wall 1021I and the outer wall 1021O, for example, three, as shown in Figure 1 However, the present application is not limited thereto, and the number of the first channels 1022 can also be other values, for example, one, two, or more than three, which can be set by a person skilled in the art according to actual conditions.

[0058] In one or more embodiments, as shown in Figures 1 to 3 The wall portion 1021 of the first cover portion 102 is non-curved in the axial direction. Thus, the air flow can flow out very smoothly through the first channel formed in the axial direction in the wall portion with such a non-curved design, the loss of air volume can be reduced, and the air supply efficiency of the air supply device can be improved. However, the present application is not limited thereto, for example, the wall portion 1021 of the first cover portion 102 can also be curved in the axial direction.

[0059] In one or more embodiments, as shown in Figure 1 and Figure 3 The wall portion 1021 is formed with a second passage 1023 that communicates the inner side and the outer side of the wall portion 1021 and does not communicate the first passage 1022, and the second passage 1023 is used to form a second air duct W2. In this way, through the formed second passage, the heat dissipation performance of the air supply device can be enhanced, and good waterproof and dustproof effects can be achieved.

[0060] In one or more embodiments, as shown in Figure 1 and Figure 3 The second passage 1023 is a U-shaped groove recessed in the axial direction from the axial end surface of the wall portion 1021 away from the second cover portion 103. However, the present application is not limited thereto, for example, the second passage can also be a through hole that penetrates the wall portion 1021 and does not communicate the first passage 1022, in which case the diameter of the through hole is greater than or equal to the radial dimension of the wiring, so that the wiring can be led out from the through hole to the outside of the air supply device. In other words, the second passage 1023 can be a groove / through hole, etc. provided at the wall portion 1021 where there is no first passage 1022, which communicates the inner side and the outer side of the wall portion 1021. The second passage will be described below taking the U-shaped groove as an example.

[0061] In the embodiments of the present application, as shown in Figure 1 and Figure 3 A plurality of U-shaped grooves can be formed along the circumference of the wall portion 1021, for example, there can be 3, but not limited thereto, there can also be 1, 2, 4 or more than 4 other values. The plurality of U-shaped grooves can be arranged at equal intervals or unequal intervals in the circumferential direction, which is not limited by the present application. Correspondingly, the same number of first passages as the number of U-shaped grooves can be formed in the circumferential direction of the wall portion 1021, but the present application is not limited thereto, the number of first passages and second passages can be different, which is not limited by the present application.

[0062] In one or more embodiments, as shown in Figure 1 and Figure 3 The U-shaped groove includes a first portion 1026a as a groove bottom and a second portion 1026b and a third portion 1026c as a wall portion of the U-shaped groove, each portion connects the inner wall 1021I and the outer wall 1021O of the wall portion 1021 in the radial direction and separates the U-shaped groove internal space from the first passage W1, the U-shaped groove internal space is the space surrounded by the components of the U-shaped groove when viewed in the radial direction. In this way, each portion of the U-shaped groove also serves as a connecting component that connects the inner wall 1021I and the outer wall 1021O of the wall portion 1021, and the stability of the first cover portion can be enhanced.

[0063] In one or more embodiments, as shown in Figure 3As shown, the first portion 1026a, as the bottom of the U-shaped groove, can itself be a groove shape protruding towards one end in the axial direction on both sides in the radial direction, thereby facilitating injection molding. However, the present application is not limited thereto, and the first portion 1026a can have other shapes, such as the same axial height at different positions in the radial direction.

[0064] In one or more embodiments, as shown in Figure 3 The rotor 1012 includes a rotor frame 1012a, and the surface of the rotor frame 1012a is provided with a plurality of through holes h. In this way, in the case of heat generation inside the motor, due to the existence of the pressure difference between the inside and outside of the motor, the heat inside the motor can be discharged through the through holes h, thereby improving the heat dissipation effect and improving the working efficiency of the air supply device.

[0065] In one or more embodiments, as shown in Figure 3 A plurality of through holes h are arranged at equal intervals on the end surface (or top surface) of the axial side (O side) of the rotor frame 1012a. In this way, it is beneficial to uniformly discharge heat and reduce noise.

[0066] It is worth noting that Figure 3 The specific arrangement of the through holes h is only exemplary, and in the embodiments of the present application, the arrangement of the through holes on the rotor frame is not limited. For example, Figure 3 The rotor frame is shown as a cylinder with a top surface and a wall, and the through holes are arranged on the top surface of the rotor frame, but this is not limited thereto. The through holes can also be arranged on the wall of the rotor frame, or the through holes can be formed on both the top surface and the wall of the rotor frame.

[0067] In addition, the rotor frame can also have other shapes other than a cylinder, and the present application does not limit this. In addition, Figure 3 The case of an external rotor motor is shown, but the present application is not limited thereto. When the motor is an internal rotor motor, through holes can also be arranged on the corresponding parts of the motor to communicate the inside and outside of the motor. That is, the present application does not limit the arrangement of the through holes, as long as the through holes formed can communicate the inside and outside of the motor.

[0068] Figure 4 is a schematic diagram of a shaft section of the air supply device of the first aspect of the present application.

[0069] In one or more embodiments, as shown in Figure 3 and Figure 4As shown, the first cover 102 also has a bottom 1024, which extends radially inward from the inner circumferential surface of the wall 1021 near the end (O' end) of the second cover 103. A receiving portion 1024a is formed on the radially inward side of the bottom 1024 around the shaft 1011, and a sealing member 105 is disposed between the receiving portion 1024a and the shaft 1011. Thus, the sealing performance of the motor is improved by the sealing member 105, preventing gas drawn in from the air inlet 1031 of the second cover 103 from entering the motor.

[0070] like Figure 4 As shown, in one or more embodiments, the axial end (O' end) of the second cover 103 has an arcuate wall 1032 extending circumferentially and surrounding the air inlet 1031, and the end (O' end) of the impeller 104 near the air inlet 1031 has an arcuate cover plate 1041. This is observed from the axial section of the air supply device 10, that is, from a perspective perpendicular to the plane of the paper. Figure 4 At least a portion of the arc-shaped wall portion 1032 and a portion of the arc-shaped cover plate 1041 are located on the same circumference of circle Q. This improves the flow efficiency of the gas drawn in from the air inlet 1031.

[0071] In this embodiment of the application, at least a portion of the arc-shaped wall portion 1032 and a portion of the arc-shaped cover plate 1041 are located on the same circumference of circle Q, which means that a portion or all of the arc-shaped wall portion 1032 and a portion of the arc-shaped cover plate 1041 are located on the same circumference of circle Q. The portion of the arc-shaped wall portion 1032 may be the portion close to the arc-shaped cover plate 1041, and the portion of the arc-shaped cover plate 1041 may be the portion close to the air inlet 1031.

[0072] In one or more embodiments, such as Figure 4 As shown, the end P1 of the arc-shaped wall portion 1032 on the side near the impeller 104 overlaps radially with the end P2 of the arc-shaped cover plate 1041 on the side near the air inlet 1031. This further improves the flow efficiency of the gas drawn in from the air inlet 1031. In this embodiment, the radial overlap size of ends P1 and P2 is not limited; furthermore, end P1 may be located radially inside end P2.

[0073] Figure 5 This is a schematic diagram of the first cover of the air supply device according to an embodiment of the first aspect of this application, showing the first cover as viewed from the axial side (O' side); Figure 6 This is another schematic diagram of the first cover of the air supply device according to the first aspect of this application, showing the first cover as viewed from the other side (O side) axially; Figure 7 This is a cross-sectional view of the first shroud of the air supply device according to an embodiment of the first aspect of this application.

[0074] In one or more embodiments, such as Figures 4 to 7 As shown, a plurality of guide vanes 1025 are provided in the space 1022 between the inner wall 1021I and the outer wall 1021O of the first cover 102. This further guides the airflow outwards, improving the air delivery efficiency of the air supply device. Furthermore, the guide vanes 1025 can also serve as connecting components between the inner wall 1021I and the outer wall 1021O, which is beneficial to the stability of the wall.

[0075] In one or more embodiments, such as Figure 4 As shown, the end P3 of the inner wall 1021I of the first shroud 102, on the side of the impeller 104 (O' side), is closer to the impeller 104 than the end P4 of the guide vane 1025, on the side of the impeller 104 (O' side). That is, in the axial direction, end P3 is closer to the O' side than end P4. This reduces the noise of the air supply device.

[0076] In the embodiments of this application, such as Figure 5 As shown, 13 guide vanes are provided in space 1022, but this application is not limited to this. The number of guide vanes 1025 can also be other values, such as 11, 12, 14, 15 or other values, which can be set by those skilled in the art according to data requirements. Furthermore, Figure 5 The illustration shows multiple guide vanes arranged at equal intervals in the circumferential direction, but this application is not limited to this. Multiple guide vanes can also be arranged at unequal intervals in the circumferential direction. For example, they can be adapted and adjusted according to the setting of the second channel 1023. Those skilled in the art can make the selection according to actual needs.

[0077] In the embodiments of this application, such as Figure 5 Figure 5 As shown, the ratio of the radial width d of the guide vane 1025 to the diameter D of the first cover 102 is a value within a predetermined range. This enables the air supply device to have excellent air outlet efficiency. In this embodiment, the value within the predetermined range can be any value between 5% and 10%, such as 5%, 6%, 7%, 8%, 9%, or 10%. However, this application is not limited to this; the ratio of d to D can also be other values. In this embodiment, the radial width d of the guide vane 1025 can be the radial distance between the radial outer circumferential surface of the inner wall 1021I and the radial inner circumferential surface of the outer wall 1021O of the first cover.

[0078] According to the embodiment of the present application, the air supply device comprises a first air duct in communication with the air inlet, the impeller and the first channel, and a second air duct in communication with the motor and separated from the first air duct. In this way, the heat dissipation performance of the air supply device can be enhanced through the first air duct and the second air duct, and the second air duct in communication with the motor is separated from the first air duct, which can prevent the gas mixed with water vapor and / or dust sucked from the air inlet of the first air duct from invading the interior of the motor, and good waterproof and dustproof performance can be achieved, ensuring the performance and service life of the product and better meeting the market demand.

[0079] Embodiments of the second aspect

[0080] The embodiments of the second aspect of the present application provide an electrical product having the air supply device of the embodiments of the first aspect. Since the structure of the air supply device has been described in detail in the embodiments of the first aspect, the content is incorporated herein, and the description is omitted here.

[0081] In the embodiments of the present application, the electrical product can be any electrical equipment provided with the air supply device, such as a hair dryer, a sweeping robot, a dust collector, an oven, etc.

[0082] According to the embodiment of the present application, the air supply device comprises a first air duct in communication with the air inlet, the impeller and the first channel, and a second air duct in communication with the motor and separated from the first air duct. In this way, the heat dissipation performance of the air supply device can be enhanced through the first air duct and the second air duct, and the second air duct in communication with the motor is separated from the first air duct, which can prevent the gas mixed with water vapor and / or dust sucked from the air inlet of the first air duct from invading the interior of the motor, and good waterproof and dustproof performance can be achieved, ensuring the performance and service life of the product and better meeting the market demand.

[0083] It is worth noting that the above only exemplarily describes the embodiments of the present application, but the embodiments of the present application are not limited thereto, and appropriate modifications can be made on the basis of the above various embodiments. In addition, the above only exemplarily describes various components, but the embodiments of the present application are not limited thereto, and the specific content of each component can also refer to the related art; in addition, components not shown in the figure can be added, or one or more components in the figure can be reduced.

[0084] The embodiments of the present application are described above in combination with specific embodiments, but those skilled in the art should understand that these descriptions are exemplary and are not a limitation on the protection scope of the embodiments of the present application. Those skilled in the art can make various modifications and changes to the embodiments of the present application according to the spirit and principles of the embodiments of the present application, and these modifications and changes are also within the scope of the embodiments of the present application.

[0085] The preferred embodiments of the present application have been described above with the aid of numerous reference to drawings. Many of the features and advantages of the embodiments of the present application can be apparent from the detailed specification, and it is intended to cover all such features and advantages. In addition, since numerous modifications and changes can readily occur to those skilled in the art, it is not desired to limit the embodiments of the present application to the exact construction and operation described herein, and accordingly, all suitable modifications and equivalents can be resorted to, falling within the scope of the present application.

Claims

1. An air supply device, the air supply device comprising: A motor, which has a shaft capable of rotating about a central axis; A first cover portion surrounding the motor, the first cover portion having a wall portion located radially outward of the motor, the wall portion forming a first channel communicating in the axial direction; The second cover has one axial end abutting against the first cover, and the other axial end having an air inlet; and An impeller, which is housed in the space enclosed by the first and second covers, and fixed to the shaft. The air supply device is characterized in that it further includes: A first air duct, the first air duct connecting the air inlet, the impeller, and the first channel; and The second air duct is separated from the first air duct and is connected to the motor. The wall portion has a second channel that connects the inner and outer sides of the wall portion but does not connect to the first channel. The second channel is used to form the second air duct and serve as the air outlet of the second air duct.

2. The air supply device according to claim 1, characterized in that, The motor also has: Rotor, the rotor rotating together with the shaft, A stator, which is radially opposed to the rotor; A circuit board, which is electrically connected to the coils of the stator; as well as The wiring is provided, with one end connected to the circuit board and the other end connected to an external device via the second air duct.

3. The air supply device according to claim 1, characterized in that, The wall portion of the first cover includes an inner wall and an outer wall spaced apart from the inner wall by a predetermined distance, and the space between the inner wall and the outer wall forms the first channel; The wall portion of the first cover is non-curved in the axial direction.

4. The air supply device according to claim 1, characterized in that, The second channel is a U-shaped groove that is axially recessed from the axial end face of the wall portion away from the second cover portion.

5. The air supply device according to claim 2, characterized in that, The rotor includes a rotor frame, and the surface of the rotor frame is provided with a plurality of through holes.

6. The air supply device according to claim 5, characterized in that, A plurality of through holes are equally spaced on one end face of the rotor frame on one axial side.

7. The air supply device according to claim 3, characterized in that, Multiple air guide vanes are provided in the space between the inner wall and the outer wall of the first cover. The end of the inner wall on the side closest to the impeller is closer to the impeller than the end of the guide vane on the side closest to the impeller.

8. The air supply device according to claim 7, characterized in that, The ratio of the radial width of the air guide vane to the diameter of the first cover is within a predetermined range.

9. The air supply device according to claim 1, characterized in that, The other end of the second cover has an arcuate wall that extends circumferentially and surrounds the air inlet. The end of the impeller near the air inlet has an arcuate cover plate. Viewed from the axial section of the air supply device, at least a portion of the arcuate wall and a portion of the arcuate cover plate are located on the same circumference.

10. The air supply device according to claim 9, characterized in that, The end of the arc-shaped wall near the impeller overlaps radially with the end of the arc-shaped cover near the air inlet.

11. The air supply device according to claim 1, characterized in that, The first cover also has a bottom that extends radially inward from an inner circumferential surface of the wall near one end of the second cover, and a receiving portion is formed around the shaft on the radially inward side of the bottom, with a sealing member disposed between the receiving portion and the shaft.

12. An electrical product, characterized in that, The electrical product has an air supply device as described in any one of claims 1 to 11.

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