Motor unit for centrifugal fan, fan assembly and air treatment equipment

Abstract

The utility model provides a motor unit for a centrifugal fan, a fan assembly and air processing equipment, which can suppress or avoid vibration and abnormal noise caused by motor operation with a simple structure. The motor unit for the centrifugal fan comprises a motor, wherein a rotating shaft is provided with an output end located on one side of a motor body; the motor bracket comprises a storage part which is provided with a first opening and is used for storing the motor main body, and the bottom of the storage part is provided with a step structure; the cover cap is arranged above the first opening in a covering manner and is provided with a fixing part and an opening part; a first part of the first rubber ring is arranged between one axial side end of the motor main body and the fixing part, and a second part of the first rubber ring is clamped with the opening part; the third part of the second rubber ring is arranged between the other axial side end of the motor body and the step structure, the second rubber ring abuts against the step structure and is connected with the motor support through the fixing part so that the motor body can be fixed to the containing part, and at least one of the first part of the first rubber ring and the third part of the second rubber ring is compressed.

Description

Technical Field

[0001] The utility model relates to a motor unit for a centrifugal fan, a fan assembly and an air treatment device. Background Art

[0002] A known fan device is provided. To avoid direct collision between the outer wall of the motor and the fixed structure, which may cause a large noise during operation, an anti-vibration ring and a positioning ring structure are sleeved on the upper and lower sides of the motor to clamp the motor. The lower end of the outer side wall of the motor is fixedly connected to the positioning ring, and screw holes are formed in the side wall of the anti-vibration ring to screw anti-vibration screws with a telescopic structure. This not only has a complex structure and poor assembly performance, but also it is difficult to ensure the strength. Summary of the Utility Model

[0003] The present utility model is completed in view of the above problems, and aims to provide a motor unit for a centrifugal fan, a fan assembly and an air treatment device, which can suppress or avoid vibration and abnormal noise caused by the operation of the motor with a simple structure.

[0004] To achieve the above object, a first aspect of the present utility model provides a motor unit for a centrifugal fan, including: a motor having a motor body and a rotating shaft, the rotating shaft extending axially and having an output end located on one side of the motor body and connected to an impeller of the centrifugal fan; a motor bracket including a receiving portion having a first opening and receiving the motor body, and a step structure provided at the bottom of the receiving portion; a cover covering above the first opening and provided with a fixing portion and an opening portion; a first rubber ring having a first part and a second part, the first part being disposed between an axial one-side end of the motor body and the fixing portion, and the second part being clamped with the opening portion; and a second rubber ring having a third part and a fourth part, the third part being disposed between an axial other-side end of the motor body and the step structure, the second rubber ring at the axial other-side end of the motor body abutting against the step structure, the motor body being fixed to the receiving portion by connecting the fixing portion to the motor bracket, and at least one of the first part of the first rubber ring and the third part of the second rubber ring being compressed.

[0005] According to the motor unit for a centrifugal fan of the present utility model, it includes a first rubber ring, which has a first part disposed between the axial one end of the motor main body and the fixing part and a second part clamped with the opening part; and a second rubber ring, which has a third part disposed between the axial other end of the motor main body and the step structure and a fourth part. The second rubber ring at the axial other end of the motor main body abuts against the step structure. The motor main body is fixed to the accommodating part by connecting the fixing part with the motor bracket. And at least one of the first part of the first rubber ring and the third part of the second rubber ring is compressed, squeezing the motor towards the direction of the motor main body axially, which can limit the displacement of the motor in the height direction due to vibration, and can suppress or avoid the vibration and abnormal noise brought by the operation of the motor with a simple structure.

[0006] In addition, in the above-mentioned motor unit for a centrifugal fan, it can also be that the hardness of at least one of the first rubber ring and the second rubber ring is 30° to 33°. Thus, the rubber has low elasticity and is more likely to deform, so that it can be clamped more tightly with the motor bracket.

[0007] In addition, in the above-mentioned motor unit for a centrifugal fan, it can also be that there is a gap between the motor main body and the inner surface of the side wall of the accommodating part. Thus, it is beneficial to dissipate heat from the motor, and at the same time, it can also prevent the motor from contacting the side wall of the accommodating part, playing a role in noise reduction.

[0008] In addition, in the above-mentioned motor unit for a centrifugal fan, it can also be that the first part of the first rubber ring is located on the axial other side of the second part, the outer diameter of the first part is larger than the outer diameter of the second part, the inner diameter of the opening part is smaller than the outer diameter of the first part, and a first flanging part in contact with the second part is provided on the periphery of the opening part. The height of the first flanging part in the axial direction is smaller than the height of the second part in the axial direction. Thus, it is beneficial to reduce the contact area between the first flanging part and the first rubber ring, so as to reduce the noise brought by vibration.

[0009] In addition, in the above-mentioned motor unit for a centrifugal fan, it can also be that the third part of the second rubber ring is located on the axial one side of the fourth part, the outer diameter of the third part is larger than the outer diameter of the fourth part, the step structure includes a retaining strip contacting the third part from the radial outside, and the height of the retaining strip in the axial direction is smaller than the height of the third part in the axial direction. Therefore, the contact area between the fourth part and the retaining strip can be reduced, and the noise can be reduced.

[0010] In addition, in the above-mentioned motor unit for a centrifugal fan, it can also be that convex ribs are provided on the surface of the step structure, and the convex ribs abut against the second rubber ring. Thus, the contact area between the second rubber ring and the step structure can be reduced, and the noise can be reduced.

[0011] For example, the cover is connected to the motor bracket by bolts, and this structure has the advantage of simple assembly.

[0012] In addition, in the above-mentioned motor unit for a centrifugal fan, it is also possible that at least a part of the periphery of the cover is provided with a second flanging portion, thereby enhancing the strength of the cover.

[0013] In addition, in the above-mentioned motor unit for a centrifugal fan, it is also possible that reinforcing ribs are provided on the motor bracket on the back of the motor mounting position to enhance the strength of the motor bracket.

[0014] In addition, in the above-mentioned motor unit for a centrifugal fan, it is also possible that an opening is provided at the bottom of the receiving portion, thereby facilitating the improvement of the heat dissipation effect of the motor.

[0015] In addition, in the above-mentioned motor unit for a centrifugal fan, it is also possible that fixing feet are provided on the cover, and this structure has the advantage of simple assembly.

[0016] In addition, in the above-mentioned motor unit for a centrifugal fan, it is also possible that the number of the fixing feet is at least three. Thus, the cover and the motor bracket can be firmly fixed, suppressing or avoiding vibration.

[0017] The second aspect of the present invention provides a fan assembly, including: any one of the above-mentioned motor units for a centrifugal fan; and a centrifugal fan, which is arranged on one axial side of the receiving portion, the centrifugal fan has an impeller and a volute, the impeller is driven by the motor, the volute surrounds the impeller, and is fixedly connected to the motor bracket.

[0018] The third aspect of the present invention provides an air handling device, including the above-mentioned fan assembly.

[0019] For example, the air handling device is a total heat exchanger, and the total heat exchanger has: a housing, in which a supply air path and an exhaust air path are formed; and a total heat exchange core, which is arranged in the housing and is communicated with the supply air path and the exhaust air path, and fan assemblies are respectively provided on the supply air path and the exhaust air path, and at least one of the fan assemblies adopts the above-mentioned fan assembly, and the fan assembly is fixed on the top plate or the bottom plate of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a perspective view schematically showing an air handling device according to an embodiment of the present invention.

[0021] Figure 2 It is a bottom view schematically showing an air handling device according to an embodiment of the present invention, in which the bottom plate of the housing is omitted.

[0022] Figure 3It is a perspective view schematically showing a fan assembly included in an air handling device according to an embodiment of the present utility model.

[0023] Figure 4 It is a cross-sectional view schematically showing a fan assembly included in an air handling device according to an embodiment of the present utility model.

[0024] Figure 5 It is a perspective view schematically showing a motor unit for a centrifugal fan included in an air handling device according to an embodiment of the present utility model.

[0025] Figure 6 It is a cross-sectional view schematically showing a motor unit for a centrifugal fan included in an air handling device according to an embodiment of the present utility model.

[0026] Figure 7 It is a perspective view showing a cover of a motor unit for a centrifugal fan included in an air handling device according to an embodiment of the present utility model.

[0027] Figure 8 It is a perspective view showing a first rubber ring of a motor unit for a centrifugal fan included in an air handling device according to an embodiment of the present utility model.

[0028] Figure 9 It is a partial cross-sectional view near the first rubber ring.

[0029] Figure 10 It is a perspective view showing a motor bracket of a motor unit for a centrifugal fan included in an air handling device according to an embodiment of the present utility model.

[0030] Figure 11 It is a partial perspective cross-sectional view near a stepped structure.

[0031] Figure 12 It is a perspective view showing a second rubber ring of a motor unit for a centrifugal fan included in an air handling device according to an embodiment of the present utility model.

[0032] Figure 13 It is a partial cross-sectional view near the second rubber ring.

[0033] Figure 14 It is a bottom view showing a motor bracket of a motor unit for a centrifugal fan included in an air handling device according to an embodiment of the present utility model.

[0034] (Symbol description)

[0035] 1 Air handling device

[0036] 10 Fan assembly

[0037] 11 Motor unit for centrifugal fan

[0038] 12 Centrifugal fan

[0039] 111 Motor

[0040] 111a Motor main body

[0041] 112 Motor bracket

[0042] 113 Cover

[0043] 113a Fixed part

[0044] 121 Impeller

[0045] 122 Volute

[0046] 1111 Rotating shaft

[0047] FB1 First flanging part

[0048] FB2 Second flanging part

[0049] H2 Opening part

[0050] JQ Reinforcing rib

[0051] R1 First rubber ring

[0052] R2 Second rubber ring

[0053] R11 First part

[0054] R12 Second part

[0055] R21 Third part

[0056] R22 Fourth part

[0057] SN Storage part

[0058] SN1 Side wall of the storage part

[0059] SN2 Bottom of the storage part

[0060] SN3 First opening

[0061] TJ Step structure

[0062] TJ3 Convex rib

[0063] TJ4 Stop bar Specific embodiments

[0064] Hereinafter, with reference to the drawings, the technical solutions of the embodiments and modification examples of the present invention will be described. In addition, the scope of the present invention is not limited to the following embodiments and modification examples, and can be arbitrarily changed within the scope of the technical idea of the present invention. In addition, in the following drawings, in order to facilitate the understanding of each structure, sometimes the actual structure is different from the scale, quantity, etc. in each structure.

[0065] In the following description, the direction parallel to the rotation axis L of the rotating shaft 1111 is referred to as the "axial direction". In addition, in the following description, the radial direction centered on the rotation axis L is simply referred to as the "radial direction", and the circumferential direction centered on the rotation axis is simply referred to as the "circumferential direction".

[0066] Here, for convenience of description, three mutually orthogonal directions are set as the X direction, the Y direction, and the Z direction, and the Z direction is parallel to the rotation axis L of the rotating shaft 1111. One side of the X direction is set as X1, the other side of the X direction is set as X2, one side of the Y direction is set as Y1, the other side of the Y direction is set as Y2, one side of the Z direction is set as Z1, and the other side of the Z direction is set as Z2.

[0067] For convenience, sometimes the Z1 direction is defined as the upward direction, and the Z2 direction is described as the downward direction. However, the above definition of the up and down directions does not limit the actual orientation and positional relationship of the respective structural elements of the air handling device 1.

[0068] <Embodiment 1>

[0069] (Overall Structure of Air Handling Device)

[0070] Figure 1 FIG. is a perspective view schematically showing the air handling device 1 of the present embodiment. Figure 2 FIG. is a bottom view schematically showing the air handling device 1 of the present embodiment, with the bottom plate of the housing omitted.

[0071] As Figure 1 and Figure 2 shown, the air handling device 1 is used as, for example, a total heat exchanger (but not limited thereto, and may also be other devices such as a humidifying device), and includes a fan assembly 10, a total heat exchange core HX, another fan assembly 20, and a housing KT. The fan assembly 10, the total heat exchange core HX, and another fan assembly 20 are housed inside the housing KT.

[0072] The housing KT has a top plate, a bottom plate KT1 spaced apart from the top plate, and side walls extending from the periphery of the top plate to the periphery of the bottom plate KT1 (the top plate and the bottom plate can be formed separately from the side walls or integrally with the side walls). The fan assembly 10 and another fan assembly 20 are fixed to the top plate or the bottom plate of the housing KT. Fresh air inlets JF, air supply outlets SF, air return inlets HF, and air exhaust outlets PF are respectively formed in two opposite side walls of the housing KT. An air supply path, for example, from the fresh air inlet JF to the air supply outlet SF, and an air exhaust path from the air return inlet HF to the air exhaust outlet PF can be formed inside the housing KT. That is, an air supply path and an air exhaust path are formed inside the housing KT. The fresh air inlet JF and the air exhaust outlet PF lead to the outside, and the air supply outlet SF and the air return inlet HF lead to the inside. The fresh air inlet JF and the air supply outlet SF can be located at two corner portions of the housing KT that are opposite to each other along one diagonal, and the air return inlet HF and the air exhaust outlet PF are located at two corner portions of the housing KT that are opposite to each other along the other diagonal.

[0073] The total heat exchange core HX is located between the fresh air inlet JF and the air supply outlet SF, and between the air return inlet HF and the air exhaust outlet PF. That is, the total heat exchange core HX is provided inside the housing KT and communicates with the air supply path and the air exhaust path. The total heat exchange core HX, for example, has: a first air flow channel that forms a part of the air supply path; and a second air flow channel that forms a part of the air exhaust path, and the air flowing through the first air flow channel can exchange heat and water vapor with the air flowing through the second air flow channel. The total heat exchange core HX, for example, has a plurality of stacked chips to form the first air flow channel and the second air flow channel.

[0074] The fan assemblies 10 and 20 are respectively provided on the air supply path and the air exhaust path. The fan assembly 10 is disposed in the air supply path inside the housing KT. Another fan assembly 20 is disposed in the air exhaust path inside the housing KT. The outdoor air is sucked into the fresh air inlet JF under the action of the fan assembly 10, flows through the total heat exchange core HX, and then enters the room through the air supply outlet SF. The indoor air is sucked into the air return inlet HF under the action of the other fan assembly 20, flows through the total heat exchange core HX, and is then exhausted to the outside through the air exhaust outlet PF. Thus, the outdoor air and the indoor air form a cross-flow in the total heat exchange core HX, and heat exchange and water vapor exchange occur between them.

[0075] In addition, at least one of the bottom plate KT1 and the top plate of the housing KT is provided with an installation and maintenance opening through which the total heat exchange core HX can enter and exit, and an installation and maintenance cover plate KT2 for opening and closing the installation and maintenance opening.

[0076] (Structure of the fan assembly)

[0077] Figure 3 is a perspective view schematically showing the fan assembly 10 included in the air handling device 1 of the present embodiment. Figure 4is a cross-sectional view schematically showing the fan assembly 10, showing a view cut by a plane passing through the rotation axis L.

[0078] As Figure 3 and Figure 4 shown, the fan assembly 10 includes a motor unit 11 for a centrifugal fan and a centrifugal fan 12. The motor unit 11 for a centrifugal fan is applied to the air handling device 1 and is disposed on one side of the centrifugal fan 12. In addition, another fan assembly 20 may have the same structure as the fan assembly 10.

[0079] The centrifugal fan 12 is disposed on the axial one side (Z2 side) of the motor bracket 112 (the following housing portion SN). The centrifugal fan 12 includes an impeller 121, a volute 122, and an air outlet 123 formed in the volute 122. The impeller 121 of the centrifugal fan 12 is driven by the motor 111. That is, the motor 111 serves as a drive source for the centrifugal fan 12 located on the axial one side (Z2 side) of the motor 111. The volute 122 surrounds the impeller 121 and is fixedly connected to the motor bracket 112 of the motor unit 11 for a centrifugal fan. The air outlet 123 is correspondingly provided with the air supply port SF.

[0080] The impeller 121 has a disk-shaped portion 121a and blades that extend axially on both sides of the outer peripheral portion of the disk-shaped portion 121a and are arranged in the circumferential direction. The disk-shaped portion 121a is coaxially connected to the motor 111 (the rotating shaft 1111 thereof) and rotates integrally with the rotating shaft 1111.

[0081] The volute 122 includes: a volute main body portion 122a having a base plate 122a1 provided with one suction port and an extension portion 122a2 extending from the outer peripheral edge of the base plate 122a1 to the Z1 side, and formed to have an opening on the Z1 side (the motor bracket 112 side); and a volute top plate 122b provided with the other suction port, the volute top plate 122b being opposed to the base plate 122a1 and closing the opening of the volute main body portion 122a. For example, at the Z1 side end of the volute main body portion 122a (the extension portion 122a2), a plurality of connection portions 1221 are arranged in the circumferential direction. The volute top plate 122b is fixed to the plurality of connection portions 1221 via fasteners such as bolts.

[0082] The volute top plate 122b is fixedly connected to the motor bracket 112. The volute top plate 122b is provided with a plurality of volute fixing portions 122b1 arranged in the circumferential direction ( Figure 4)。The volute fixing portion 122b1 is, for example, a through hole that axially penetrates the volute top plate 122b. The motor bracket 112 is fixed to the volute 122 by passing a bolt through the through hole 122b1 and threadedly fastening it to the following outer column P2 of the motor bracket 112. That is, the volute 122 is provided with a volute fixing portion 122b1, and the volute 122 is fixedly connected to the motor bracket 112 through the volute fixing portion 122b1 and is installed on the housing KT via the motor bracket 112. In addition, a protruding edge protruding toward the Z1 side can be provided at the Z1 side edge of the through hole that is the volute fixing portion 122b1 to guide the fixing of the outer column P2 of the motor bracket 112 and the volute 122.

[0083] Another air suction port is formed approximately at the center of the volute top plate 122b. The rotating shaft of the motor 111 extends into this another air suction port and is connected to the following disc-shaped portion 121a of the impeller 121. The volute main body portion 122a and the volute top plate 122b cover the impeller 121 from both sides in the axial direction of the impeller 121 and together enclose an air duct. The air outlet 123 is formed in the extension portion 122a2 of the volute main body portion 122a. When the centrifugal fan 12 operates, air flows are sucked into the air duct formed by the volute 122 from the another air suction port of the volute top plate 122b and the one air suction port of the base plate 122a1 of the volute main body portion 122a, and are blown out from the air outlet 123 after being pressurized.

[0084] A part of the Z2 side (the centrifugal fan 12 side) of the centrifugal fan motor unit 11 (the housing portion SN and a part of the motor 111) extends into the radial inner side of the impeller 121, which helps to reduce the size of the fan assembly in the axial direction, is beneficial to the overall miniaturization and thinning of the fan assembly, and thus is beneficial to the overall miniaturization and thinning of the air handling equipment. In addition, a part of the centrifugal fan motor unit 11 is exposed from the volute 122.

[0085] (Structure of the centrifugal fan motor unit)

[0086] Figure 5 It is a perspective view schematically showing the centrifugal fan motor unit 11. Figure 6 It is a cross-sectional view schematically showing the centrifugal fan motor unit 11, showing a view cut by a plane passing through the rotation axis L. Figure 7 It is a perspective view showing the cover 113. Figure 8 It is a perspective view showing the first rubber ring. Figure 9 It is a partial cross-sectional view near the first rubber ring, showing a view cut by a plane passing through the rotation axis L. Figure 10 It is a perspective view showing the motor bracket 112. Figure 11 It is a partial cross-sectional perspective view near the step structure. Figure 12 It is a perspective view showing the second rubber ring. Figure 13is a partial cross-sectional view near the second rubber ring, showing a view cut by a plane passing through the rotation axis L. Figure 14 is a bottom view showing the motor bracket 112.

[0087] The motor unit 11 for a centrifugal fan includes a motor 111, a motor bracket 112, a cover 113, a first rubber ring R1, and a second rubber ring R2. The motor 111 has a motor body 111a and a rotating shaft 1111. The rotating shaft 1111 extends in the axial direction and has an output end, which is located on the axial side (Z2 side) of the motor body 111a and is connected to the impeller 121 of the centrifugal fan 12. The motor body 111a is, for example, a DC motor, and has a stator, a rotor that rotates relative to the stator, and a motor housing that houses the stator and the rotor. The rotating shaft 1111 is inserted into the rotor and rotates integrally with the rotor. The front end portion of the rotating shaft 1111 as the output end protrudes to a position on the axial side (Z2 side) closer than the motor body 111a (there is no shaft outside the other axial side of the motor body). The rotating shaft 1111 is connected to the impeller 121 at the front end portion.

[0088] The motor bracket 112 supports the motor 111. For example, the motor bracket 112 is an integrally formed resin part, which can achieve weight reduction, reduce the number of components, and simplify assembly. In this embodiment, the motor bracket 112 is fixedly installed on the top plate of the housing KT. The motor bracket 112 is fixedly connected to the volute 122.

[0089] The motor bracket 112 includes a receiving portion SN. The receiving portion SN has a first opening SN3 at the axial side (Z2 side) end and houses the motor body 111a. For example, the motor body 111a is received in the receiving portion SN from the Z2 side through the first opening SN3.

[0090] The motor bracket 112 further includes an annular base portion DZ. The receiving portion SN is provided on the base portion DZ and forms a receiving space SP for housing the motor body 111a. When observed in the axial direction, the receiving space SP is circular. The receiving portion SN is in the shape of a bottomed cylinder and has a side wall SN1 and a bottom SN2. The side wall SN1 and the bottom SN2 are each formed to have a certain thickness.

[0091] In this embodiment, the side wall SN1 is integrally in the shape of a cylinder extending in the axial direction and coaxial with the base portion DZ. A receiving space SP is formed inside the side wall SN1, and the motor body 111a is received in the receiving space SP in a coaxial manner with the side wall SN1. There is a gap between the motor body 111a and the inner surface (the inner wall surface of the receiving portion SN) of the side wall SN1 of the receiving portion SN, which is beneficial for dissipating heat of the motor 111. At the same time, it can also prevent the motor 111 (the motor body 111a) from contacting the side wall SN1 of the receiving portion SN, playing a role in noise reduction.

[0092] AsFigure 5 As shown, a heat dissipation hole H1 is provided on the side wall SN1. Providing a heat dissipation hole on the side wall SN1 is beneficial to improving the heat dissipation effect of the motor 111. In this embodiment, the heat dissipation hole H1 is formed by cutting off a portion of the side wall SN1 in the circumferential direction to form a notch, and the notch extends from the Z2 side end of the storage portion SN toward the Z1 side end of the storage portion SN. In a preferred embodiment, the heat dissipation hole H1 is arranged on the side of the air outlet facing the full heat exchange core HX. In this way, the heat dissipation hole H1 is arranged on the windward side of the motor bracket 112, so that the first heat dissipation hole can be arranged at a position with a large flow rate, further improving the heat dissipation effect of the motor 111.

[0093] like Figure 5 As shown, the side wall SN1 of the storage portion SN is provided with a plurality of (three in this embodiment) inner pillars P1 arranged at equal intervals in the circumferential direction on the outer peripheral surface. Each inner pillar P1 is provided with an internal threaded hole at the Z2 side end, for example, for the cover 113 to be screwed and fastened.

[0094] The bottom SN2 is provided at the Z1 side end of the storage portion SN, extends radially inward from the inner circumference of the side wall SN1, and has a bottom through hole H3 formed in the center. For example, the hole wall of the bottom through hole H3 is formed to protrude from the bottom SN2 to the other axial side (Z1 side).

[0095] The storage portion SN is disposed on the base portion DZ. The base portion DZ is in the shape of a truncated cone extending radially outward from the portion of the side wall SN1 of the storage portion SN on the other axial side (Z1 side) (including the end on the Z1 direction side, i.e., the end on the side facing away from the centrifugal fan 12), and the outer diameter of the base portion DZ gradually decreases from the Z1 side toward the Z2 side. The outer periphery of the base portion DZ can extend in the axial direction to a position substantially the same as the bottom SN2 of the storage portion SN (the bottom through hole H3 thereof).

[0096] The base portion DZ of the motor bracket 112 also includes a plurality of outer columns P2 arranged in a circumferential direction. The plurality of outer columns P2 extend from the outer periphery of the base portion DZ toward one side in the axial direction and are arranged at equal intervals in the circumferential direction. The motor bracket 112 is fixed to the volute 122 through the volute fixing portion 122b1 of the volute 122 and the outer columns P2. For example, the outer column P2 is provided with an internal threaded hole at one end of the axial side (Z2 side), so that a bolt passes through the through hole of the volute 122 as the volute fixing portion 122b1 and is threadedly fastened with the internal threaded hole.

[0097] In the axial direction of the base portion DZ, a part of the accommodation space SP overlaps with the base portion DZ (that is, the accommodation space SP is formed to a position that overlaps with the base portion DZ in the axial direction). In the present embodiment, the base portion DZ extends outward in the radial direction from a position in the middle of the side wall SN1 of the accommodation portion SN and closer to the other axial side (Z1 side). By making the base portion DZ extend outward in the radial direction from the middle of the side wall SN1 of the accommodation portion SN, the axial dimension of the motor bracket 112 can be reduced, which is beneficial to the overall miniaturization and thinning of the fan assembly, and thus beneficial to the overall miniaturization and thinning of the air handling device. In addition, in a preferred solution, the outer peripheral surface of the base portion DZ is smoothly connected to the outer peripheral surface of the side wall SN1 of the accommodation portion SN, so that the air flow can smoothly pass through the surface of the motor bracket 112.

[0098] The cover 113 is provided above the first opening SN3. As Figures 5 to 7 shown, the cover 113 is generally in the shape of a plate. The cover 113 is provided with a fixing portion 113a and an opening H2. The fixing portion 113a is annular. The opening H2 is located in the middle of the fixing portion 113a. In the present embodiment, the fixing portion 113a is formed with an opening H2 in the center for the rotation shaft 1111 of the motor 111 to pass through. When observed in the axial direction, the opening H2 is circular. The fixing portion 113a is substantially annular. The cover 113 is detachably fixed to the motor bracket 112, and a motor mounting position is formed between the motor bracket 112 and the cover 113. For example, the cover 113 and the motor bracket 112 are connected by bolts, and the assembly is simple. In addition, the cover 113 is made of, for example, a metal material, plastic, etc.

[0099] The cover 113 is provided with fixing feet 113b. The fixing feet 113b protrude outward in the radial direction from the outer peripheral edge of the fixing portion 113a, and a plurality of them are circumferentially arranged at intervals corresponding to the inner upright column P1. The number of the fixing feet is at least three, so that the cover 113 can be more firmly fixed to the motor bracket 112 to avoid vibration. In the present embodiment, three fixing feet are provided. For example, the fixing feet 113b are provided with holes for connecting to the Z2 side end of the inner upright column P1 through connecting members such as bolts.

[0100] The first rubber ring R1 is provided at the axial side (Z2 side) end of the motor main body 111a. The first rubber ring R1 (the following first part R11) is provided between the axial side (Z2 side) end of the motor main body 111a and the fixing portion 113a. The motor main body 111a is fixed to the accommodation portion SN by connecting the fixing portion 113a to the motor bracket 112. The axial side end of the motor main body 111a is connected to the motor bracket 112 through the fixing portion 113a, and the cover 113 and the first rubber ring R1 are clamped. As Figure 8 and Figure 9As shown, the first rubber ring R1 has: a first portion R11; and a second portion R12 located on the axial side (Z2 side) of the first portion R11. The outer diameter of the first portion R11 is larger than the outer diameter of the second portion R12. In addition, the inner diameter of the second portion R12 and the inner diameter of the first portion R11 may be the same or substantially the same. The second portion R12 is clamped to the opening H2. The second portion R12 has an outer peripheral surface R12a extending in the axial direction. The first portion R11 has an outer peripheral surface R11a extending in the axial direction and an axially-side surface R11b that bends radially inward from the axially-side end of the outer peripheral surface R11a. The axially-other-side end of the outer peripheral surface R12a of the second portion R12 is in contact with the radially-inner end of the axially-side surface R11b of the first portion R11.

[0101] The second portion R12 is stuck in the opening H2 of the cover 113 and the inner diameter of the opening H2 is smaller than the outer diameter of the first portion R11. In addition, a first flanging portion FB1 that contacts the second portion R12 is provided on the periphery of the opening H2. The first flanging portion FB1 bends from the periphery of the opening H2 (the inner periphery of the fixing portion 113a) to the axial side (Z2 side). In this embodiment, the first flanging portion FB1 is formed over the entire circumferential range. The first rubber ring R1 (the second portion R12 thereof) and the opening H2 are in an interference fit, and the opening H2 (via the first flanging portion FB1) exerts a certain extrusion force on the second portion R12 of the first rubber ring R1. For example, the inner diameter of the opening H2 (the first flanging portion FB1) is slightly smaller than the outer diameter of the second portion R12 of the first rubber ring R1; in the installed state, the portion of the outer surface of the second portion R12 that abuts against the opening H2 (the first flanging portion FB1) is extruded and deformed by the opening H2 (the first flanging portion FB1), thereby achieving a relatively firm fixing method. After the motor is removed, the extruded portion rebounds and the rubber ring returns to its original shape.

[0102] The cover 113 contacts the first rubber ring R1 at the inner peripheral edge of the fixing portion 113a and the first flanging portion FB1. The outer peripheral surface R12a of the second portion R12 of the first rubber ring R1 contacts the first flanging portion FB1 in the radial direction. The first flanging portion FB1 surrounds the second portion R12 from the radial outside. The first rubber ring R1 is limited in the radial direction by the first flanging portion FB1 to prevent displacement of the first rubber ring R1 in the radial direction. The axial one-side surface R11b of the first portion R11 contacts the fixing portion 113a in the axial direction. The first rubber ring R1 is limited in the axial direction by the fixing portion 113a to prevent displacement of the first rubber ring R1 in the axial direction (towards the Z2 side). In a preferred solution, the height of the first flanging portion FB1 in the axial direction is smaller than the height of the second portion R12 in the axial direction (a part on the Z2 side of the second portion R12 protrudes from the first flanging portion FB1). Thus, it is beneficial to reduce the contact area between the first flanging portion FB1 and the first rubber ring R1 (the second portion R12), thereby reducing the noise caused by vibration. Moreover, the contact area between the cover 113 and the first rubber ring R1 only includes the inner surface area of the first flanging portion FB1 and the area corresponding to the vicinity of the inner peripheral edge of the fixing portion 113a in the axial one-side surface R11b of the first portion R11, and the overall contact area is small. In addition, the height of the first flanging portion FB1 in the axial direction may also be the same as or substantially the same as the height of the first portion R11 in the axial direction.

[0103] In addition, a bearing K1 for supporting an intermediate portion in the axial direction of the rotating shaft 1111 is fitted in the center of the first rubber ring R1. The bearing K1 supports the rotating shaft 1111 to be rotatable, and a ball bearing or the like can be used. For example, as Figure 9 shown, the motor main body 111a includes a rigid bearing bracket K11 for installing the bearing K1, which surrounds and supports the bearing K1 from the radial outside and is fixedly connected to the motor housing. The bearing bracket K11 is received in the central hole portion of the first rubber ring R1. The inner diameter of the central hole portion of the first rubber ring R1 is smaller than the outer diameter of the bearing bracket K11. The bearing bracket K11 compresses the central hole portion by extruding it towards the radial outside in a state where it is inserted into the central hole portion of the first rubber ring R1.

[0104] Returning to Figure 7 , at least partially around the cover 113, a second flanging portion FB2 is provided to enhance the strength of the cover 113. In the present embodiment, the second flanging portion FB2 that is bent axially is continuously provided at the fixing portion 113a and the connecting portion between the fixing portion 113a and the fixing leg 113b. In a preferred solution, the second flanging portion FB2 is bent from the cover 113 towards the axial one side (Z2 side), so that when the cover 113 is installed on the motor bracket 112, there is no need to additionally provide an avoidance portion at a part of the second flanging portion FB2.

[0105] In addition, a gap may be provided between the outer peripheral edge of the cover 113 and the inner wall surface (the inner surface of the side wall SN1) of the accommodating portion SN, thereby further improving the heat dissipation effect of the motor 111. When viewed axially, the size of the fixing portion 113a of the cover 113 is smaller than the size of the accommodating portion SN, and the outer peripheral edge of the fixing portion 113a of the cover 113 is radially inward of the inner wall surface of the accommodating portion SN.

[0106] The second rubber ring R2 is provided at the axially opposite side (Z1 side) end of the motor main body 111a. A step structure TJ is provided at the bottom SN2 of the accommodating portion SN. The following third portion R21 of the second rubber ring R2 is provided between the axially opposite side end of the motor main body 111a and the step structure TJ.

[0107] As Figure 11 shown, the step structure TJ has a cylindrical portion TJ1 extending axially and an annular portion TJ2 extending radially outward from the axially one side (Z2 side) end of the cylindrical portion TJ1. The hole wall of the bottom through hole H3 constitutes the cylindrical portion TJ1. The annular portion TJ2 is provided around the axially one side end of the bottom through hole H3.

[0108] As Figure 12 and Figure 13 shown, the second rubber ring R2 has: a third portion R21; and a fourth portion R22 located on the axially opposite side (Z1 side) of the third portion R21. The outer diameter of the third portion R21 is larger than the outer diameter of the fourth portion R22. In addition, the inner diameter of the fourth portion R22 and the inner diameter of the third portion R21 may be the same or substantially the same. The fourth portion R22 is disposed in the cylindrical portion TJ1 (bottom through hole H3), and the cylindrical portion TJ1 (bottom through hole H3) is used to restrict the radial displacement of the fourth portion R22. Axially, the height (height in the Z1 direction) of the fourth portion R22 is smaller than the height of the cylindrical portion TJ1 (bottom through hole H3), so as to prevent the second rubber ring R2 from exceeding the motor bracket 112 and contacting components outside the motor bracket 112 (such as the foam in the housing KT, etc.), generating noise.

[0109] The fourth portion R22 has an outer peripheral surface R22a extending axially. The third portion R21 has an outer peripheral surface R21a extending axially and an axially opposite surface R21b bent radially inward from the axially opposite side end of the outer peripheral surface R21a. The axially one side end of the outer peripheral surface R21a of the fourth portion R22 is in contact with the radially inner end of the axially opposite surface R21b of the third portion R21.

[0110] The second rubber ring R2 at the axially opposite side end of the motor main body 11a abuts against the step structure TJ. The second rubber ring R2 is snap-fitted to the step structure TJ. In the present embodiment, ribs TJ3 are provided on the surface of the step structure TJ ( Figure 11). More specifically, the cylindrical portion TJ1 of the stepped structure TJ and the outer peripheral surface R22a of the fourth part R22 are radially opposed to each other ( Figure 13 ). The annular portion TJ2 and the axially opposite surface R21b of the third part R21 are axially opposed. The rib TJ3 includes: a cylindrical rib TJ31 provided on the cylindrical portion TJ1, and the cylindrical rib TJ31 protrudes radially inward from the cylindrical portion TJ1; and an annular rib TJ32 provided on the annular portion TJ2, and the annular rib TJ32 protrudes axially to one side (Z2 side) from the annular portion TJ2. The cylindrical rib TJ31 and the annular rib TJ32 may be continuously provided or may be offset. The cylindrical rib TJ31 and the annular rib TJ32 may each be provided with a plurality of spaced intervals in the circumferential direction. In this case, the rib TJ3 abuts against the second rubber ring R2, wherein the cylindrical rib TJ31 abuts against the outer peripheral surface R22a of the fourth part R22 in the radial direction, and the annular rib TJ32 abuts against the axially opposite surface R21b of the third part R21 in the axial direction. Thus, the contact area between the outer peripheral surface R22a of the fourth part R22 and the axially opposite surface R21b of the third part R21 and the stepped structure TJ (bottom through hole H3) can be reduced, and the noise can be reduced. And, the displacement of the fourth part R22 in the radial direction is restricted by the cylindrical portion TJ1 (the cylindrical rib TJ31 thereof). The displacement of the third part R21 in the axial direction (toward the Z1 side) is restricted by the annular portion TJ2 (the annular rib TJ32 thereof).

[0111] In a preferred embodiment, at least the axially one side (Z2 side) end of the cylindrical rib TJ31 is formed to be inclined radially outward (projecting radially inward as it faces the axially opposite side (Z1 side)) ( Figure 11 ), whereby it is possible to facilitate the installation of the second rubber ring R2 on the stepped structure TJ. In addition, in another preferred embodiment, the second rubber ring R2 (the fourth part R22 thereof) is extruded radially inward via the rib TJ3. As Figure 13 shown, the inner diameter of the inclined surface of the upper half of the cylindrical rib TJ31 is slightly smaller than the outer diameter of the fourth part R22 of the second rubber ring R2 as a whole; in the installed state, the portion of the outer surface of the fourth part R22 that abuts against the cylindrical rib TJ31 is extruded and deformed by the cylindrical rib TJ31 (an interference fit between the two), thereby achieving a relatively firm fixing method. After the motor is removed, the extruded portion rebounds and the rubber ring returns to its original shape. In addition, the rubber ring can also be received at positions other than the rib. Alternatively, the surface of the stepped structure TJ may not have the rib TJ3. In this case, the cylindrical portion TJ1 is in direct contact with the outer peripheral surface R22a of the fourth part R22 in the radial direction, and the annular portion TJ2 is in direct contact with the axially opposite surface R21b of the third part R21 in the axial direction.

[0112] In addition, as Figure 11and Figure 13 As shown, the stepped structure TJ may further include a retaining strip TJ4 that contacts the third portion R21 of the second rubber ring R2 from the radially outer side. The retaining strip TJ4 is located on the radially outer side of the annular portion TJ2. In this way, at least a part of the third portion R21 is received in the stepped structure TJ. The second rubber ring R2 is limited in the radial direction by the retaining strip TJ4 to prevent the second rubber ring R2 from displacing in the radial direction. In this embodiment, the retaining strip TJ4 is formed over the entire circumferential range. In a preferred solution, the height of the retaining strip TJ4 in the axial direction is smaller than the height of the third portion R21 in the axial direction, so as to reduce the contact area between the third portion R21 and the retaining strip and reduce noise. In addition, the height of the retaining strip TJ4 in the axial direction may also be the same as or substantially the same as the height of the third portion R21 in the axial direction.

[0113] In addition, a bearing K2 that supports the Z1-side end side of the rotating shaft 1111 is fitted in the center of the second rubber ring R2. The bearing K2 supports the rotating shaft 1111 so that it can rotate, and a ball bearing or the like can be used. For example, as Figure 13 shown, the motor main body 111a is provided with a rigid bearing bracket K21 for installing the bearing K2, which surrounds and supports the bearing K2 from the radially outer side and is fixedly connected to the motor housing. The bearing bracket K21 is received in the hole portion in the center of the second rubber ring R2. The inner diameter of the central hole portion of the second rubber ring R2 is smaller than the outer diameter of the bearing bracket K21. The bearing bracket K21 presses the central hole portion radially outward to compress it in the state of being inserted into the central hole portion of the second rubber ring R2.

[0114] In a preferred solution, the hardness of at least one of the first rubber ring R1 and the second rubber ring R2 is 30° to 33°. Thus, the rubber elasticity is low, and it is easier to generate deformation, so that it can be clamped more tightly with the motor bracket. Further preferably, the hardness of both the first rubber ring R1 and the second rubber ring R2 is 30° to 33°.

[0115] When the cover is fixedly connected to the motor bracket 112, the first portion R11 of the first rubber ring R1 is disposed between the axial one side (Z2 side) end of the motor main body 111a and the fixing portion 113a, and the third portion R21 of the second rubber ring R2 is disposed between the axial other side (Z1 side) end of the motor main body 111a and the stepped structure TJ. Among them, at least one of the first portion R11 of the first rubber ring R1 and the third portion R21 of the second rubber ring R2 is compressed. In this way, the motor 111 is axially pressed toward the motor main body 111a (see Figure 6The blank arrow) can limit the displacement of the motor 111 in the height direction due to vibration, and can suppress or avoid the vibration and abnormal noise caused by the operation of the motor with a simple structure. In a preferred solution, both the first part R11 of the first rubber ring R1 and the third part R21 of the second rubber ring R2 are compressed.

[0116] In addition, a reinforcing rib JQ can be provided on the motor bracket 112 on the back of the motor mounting position. As described above, the base portion DZ is in the shape of a frustum of a cone that expands radially outward from the portion of the side wall SN1 of the storage portion SN on the other side (Z1 side) in the axial direction, and the outer diameter of the base portion DZ gradually decreases from the Z1 side toward the Z2 side. Thus, a cavity portion is formed on the back surface (radially inner side) of the base portion DZ. The reinforcing rib JQ can be provided on at least one of the back surface of the base portion DZ and the back surface of the storage portion SN to enhance the strength of the motor bracket 112. In Figure 6 and Figure 14 the example of, the reinforcing rib JQ stands upright from the back surface of the base portion DZ and the back surface of the storage portion SN toward the Z1 side. The reinforcing rib JQ includes at least one of the first reinforcing rib JQA and the second reinforcing rib JQB. The first reinforcing rib JQA extends radially outward from the bottom through hole H3 of the bottom SN2 of the storage portion SN (in the illustrated example, a plurality of the first reinforcing ribs JQA are provided at equal angular intervals in the circumferential direction, but it is not limited thereto). The second reinforcing rib JQB is in a ring shape surrounding the center of the base portion DZ at a position radially outside the bottom SN2 of the storage portion SN (the second reinforcing rib JQB can be provided with one in the radial direction or a plurality of them can be provided at a predetermined interval in the radial direction).

[0117] In addition, as Figure 5 shown, the base portion DZ can be provided with a wire groove GX. The wire groove GX extends from the center side of the base portion ZD to the outer peripheral edge of the base portion DZ. The position of the wire groove GX in the circumferential direction is substantially the same as that of the heat dissipation hole H1 of the storage portion SN. The wire groove GX opens toward the axial side (Z2 side). In a preferred solution, the wire groove GX communicates with the heat dissipation hole H1, so that the wiring of wires and the like electrically connected to the motor coil can be easily performed. In addition, in a preferred solution, one or more protruding plates GX1 extending toward the inside of the groove are provided at the opening edge on the axial side (Z2 side) of the wire groove as a wire pressing structure for clamping wires and the like in the wire groove GX.

[0118] In addition, a plurality of bracket mounting portions 112AZ arranged in the circumferential direction are provided on the base portion DZ. The bracket mounting portion 112AZ is fixed to the housing KT of the air handling device 1 by a fastener such as a bolt. In Figure 6In the example, the bracket mounting portion 112A Z is formed as a bottomed hole portion that recesses from a position radially inward of the outer column P2 of the base portion DZ toward the other axial side (Z1 side). A through hole penetrating in the axial direction is formed at the bottom of the bottomed hole portion, and a bolt passes through the through hole and is threadedly fastened to the housing KT. The bracket mounting portion 112A Z protrudes axially to a position closer to the other axial side (Z1 side) than other parts of the motor bracket 112. In a preferred embodiment, as Figure 14 shown, on the back side (Z1 side) of the bracket mounting portion 112A Z, a shock-absorbing pad HC (made of rubber, for example) is provided, so that vibrations generated by the motor can be reduced from being transmitted to the housing KT of the air handling device 1.

[0119] The present utility model has been described exemplarily above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above embodiments.

[0120] For example, in the above embodiment, one or more openings may be further provided at the bottom SN2 of the storage portion SN, thereby improving the heat dissipation effect of the motor 111. The shape of the opening is not particularly limited and may be circular, polygonal, or irregular.

[0121] For example, in the above embodiment, the first flanging portion FB1 is formed over the entire circumferential range. However, it is not limited thereto, and the first flanging portion FB1 may also be formed locally in the circumferential direction.

[0122] For example, in the above embodiment, the retaining strip TJ4 is formed over the entire circumferential range. However, it is not limited thereto, and the retaining strip TJ4 may also be formed locally in the circumferential direction.

[0123] For example, in the above embodiment, the heat dissipation hole H1 is formed as a notch extending from the Z2-side end of the side wall SN1 of the storage portion SN toward the Z1-side end. However, it is not limited thereto, and the heat dissipation hole H1 may also be formed in a form with a smaller axial dimension (the heat dissipation hole H1 may not extend to the axial end of the side wall SN1). For example, it may be formed as a through hole penetrating the side wall SN1 of the storage portion SN, and the number thereof is not particularly limited, nor is the shape, which may be circular, polygonal, or irregular.

[0124] In addition, in the above embodiment, the storage portion SN has a side wall SN1 that is circular when viewed axially, but it is not limited thereto, and the side wall SN1 may also be replaced by a prism-shaped portion.

[0125] In addition, in the above embodiment, in the axial direction, a part of the storage space SP overlaps with the base portions DZ and DZA, but it is not limited thereto, and the storage space SP may also be formed such that the whole is closer to the Z2 side than the base portion.

[0126] In addition, in the above-described embodiment, the volute 122 is fixed to the housing KT (e.g., the top plate) via the outer column P2 through the motor brackets 112, 112A. However, it is not limited thereto, and the volute 122 may also be fixed to the housing KT (e.g., the top plate) via sheet metal or the like. An installation foot may also be integrally formed on the volute 122 for installation on the housing KT (e.g., the top plate).

[0127] In addition, in the above-described embodiment, the number and arrangement of the reinforcing ribs JQ can be changed as needed, and the reinforcing ribs JQ may be omitted according to circumstances.

[0128] In addition, in the above-described Embodiment 1, the wire trough GX is provided in the base portion DZ, but it is not limited thereto, and it may also be provided in the storage portion SN, or provided in both the storage portion SN and the base portion DZ at the same time.

[0129] In addition, in the above-described Embodiment 1, a second heat dissipation hole may also be provided in the base portion DZ, and a third heat dissipation hole may be provided in the cover 113 to further improve the heat dissipation effect of the motor 111.

[0130] In addition, in the above-described Embodiment 1, the fan assembly 10 and the centrifugal fan motor unit 11 are applied to the air handling device 1. However, it is not limited thereto, and the fan assembly 10 may also be applied to a device that does not have another fan assembly 20 and a return air port HF. In this case, the total heat exchange core HX may also be omitted. The centrifugal fan motor unit 11 may also be used in other devices that use a motor as a driving source.

[0131] The specific embodiments of the present invention have been specifically described above in conjunction with the accompanying drawings. However, it can be understood that the above description does not limit the present invention in any form, and the technical features in each embodiment can be combined with each other in any way to form a new embodiment. In addition, after understanding the above specific embodiments, those skilled in the art can make various other modifications and changes to the present invention as needed. These do not deviate from the essence of the present invention.

Claims

1. A motor unit for a centrifugal fan, characterized in that, Comprising: A motor, having a motor body and a rotating shaft, the rotating shaft extending axially and having an output end, the output end being located on one side of the motor body and connected to the impeller of the centrifugal fan; A motor bracket, including a receiving portion having a first opening and receiving the motor body, and a stepped structure provided at the bottom of the receiving portion; A cover, covering above the first opening, and provided with a fixing portion and an opening portion; A first rubber ring, having a first portion and a second portion, the first portion being disposed between the axially one-side end of the motor body and the fixing portion, and the second portion being clamped with the opening portion; And A second rubber ring, having a third portion and a fourth portion, the third portion being disposed between the axially the other-side end of the motor body and the stepped structure, The second rubber ring at the axially the other-side end of the motor body abuts against the stepped structure, The motor body is fixed to the receiving portion by connecting the fixing portion to the motor bracket, and at least one of the first portion of the first rubber ring and the third portion of the second rubber ring is compressed.

2. The motor unit for a centrifugal fan according to claim 1, wherein The hardness of at least one of the first rubber ring and the second rubber ring is 30° to 33°.

3. The motor unit for a centrifugal fan according to claim 1, wherein There is a gap between the motor body and the inner surface of the side wall of the receiving portion.

4. The motor unit for a centrifugal fan according to claim 1, wherein The first portion of the first rubber ring is located axially on the other side of the second portion, and the outer diameter of the first portion is larger than the outer diameter of the second portion, The inner diameter of the opening portion is smaller than the outer diameter of the first portion, The peripheral edge of the opening portion is provided with a first flanging portion in contact with the second portion, and the height of the first flanging portion in the axial direction is smaller than the height of the second portion in the axial direction.

5. The motor unit for a centrifugal fan according to claim 1, wherein The third portion of the second rubber ring is located axially on one side of the fourth portion, and the outer diameter of the third portion is larger than the outer diameter of the fourth portion, The stepped structure includes a retaining strip in contact with the third portion from the radially outer side, and the height of the retaining strip in the axial direction is smaller than the height of the third portion in the axial direction.

6. The motor unit for a centrifugal fan according to claim 1, wherein The surface of the stepped structure is provided with a convex rib, and the convex rib abuts against the second rubber ring.

7. The motor unit for a centrifugal fan according to claim 1, wherein The cover is connected to the motor bracket by bolts.

8. The motor unit for a centrifugal fan according to claim 1, wherein At least partially around the cover is provided with a second flanging portion.

9. The motor unit for a centrifugal fan according to claim 1, wherein Reinforcing ribs are provided on the motor bracket on the back of the motor mounting position.

10. The motor unit for a centrifugal fan according to claim 1, wherein The bottom of the receiving portion is provided with an opening.

11. The motor unit for a centrifugal fan according to claim 1, wherein: Fixing feet are provided on the cover.

12. The motor unit for a centrifugal fan according to claim 11, wherein: The number of the fixing feet is at least three.

13. A fan assembly, characterized in that, Comprising: The motor unit for a centrifugal fan according to any one of claims 1 to 12; And A centrifugal fan, which is arranged on the axial side of the accommodating part, The centrifugal fan has an impeller and a volute. The impeller is driven by the motor, and the volute surrounds the impeller and is fixedly connected to the motor bracket.

14. An air treatment device, characterized in that, Comprising the fan assembly according to claim 13.

15. The air handling equipment according to claim 14, wherein: The air handling equipment is a total heat exchanger, The total heat exchanger has: A housing, in which a supply air path and an exhaust air path are formed; and A total heat exchange core, which is arranged in the housing and is communicated with the supply air path and the exhaust air path, Fan assemblies are respectively provided on the supply air path and the exhaust air path, and at least one of the fan assemblies adopts the fan assembly according to claim 13, The fan assembly is fixed on the top plate or the bottom plate of the housing.

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