WO2023275106A1

WO2023275106A1 - Fan motor mounting, in particular in a heating, ventilating and air-conditioning device

Info

Publication number: WO2023275106A1
Application number: PCT/EP2022/067820
Authority: WO
Inventors: Raghu Tejaswi BELLUR; Christian Jonhatan SOTO; Jan Liska; Juraj LEPOT
Original assignee: Valeo Klimasysteme Gmbh
Priority date: 2021-06-30
Filing date: 2022-06-29
Publication date: 2023-01-05
Also published as: DE102021116920A1

Abstract

A fan motor mounting comprising an inner fan motor receptacle, which accommodates a fan motor having a drive axis, and an external structure which supports the inner fan motor receptacle. The drive axis of the fan motor forms a cylindrical coordinate axis of a system of cylindrical coordinates, wherein, in order to limit a relative movement between the inner fan motor receptacle and the external structure, a spaced-apart pair of surface components is in each case formed at a different radial distance at at least two different ordinate distances.

Description

WO 2023/275106 PCT/EP2022/067820 1

description

Title: Blower motor storage especially in a heating, ventilation and

air conditioner

field of invention

The present invention relates generally to an air conditioning system for a vehicle, and more particularly to a fan motor mount in such a system

State of the art

Rotating masses of a fan system of heating, ventilation and air-conditioning devices can be a significant source of vibration and noise related to static and dynamic imbalances of the rotating masses. Therefore, a decoupling system with soft material decoupling elements is typically used to reduce vibration transmission between the rotating masses and the static structures surrounding the rotating masses. Additionally, during operation of the fan system, random external forces are induced caused by the interaction between the vehicle and the environment. The dynamic reaction of the fan system, which is decoupled by low-rigidity isolating elements, can lead to increased vibrations of the fan system. In extreme cases, the decoupling elements can be damaged and cause the blower system to fail.

A known, manufactured by the applicant fan system of heating, ventilation and air conditioning equipment, equipped with an engine vibration limiter is shown in FIG. The blower system includes a blower motor 40 with a fan wheel 60. The blower motor 40 is accommodated in an inner blower motor mount 20. The inner fan motor mount 20 is mounted to an outer structure 30 via decoupling members 23 . A cover 50 is attached to the outer structure 30 . Oscillations of the fan motor 40 can be absorbed by the decoupling elements 23 to a certain extent, whereby the transmission of vibrations and the formation of noise can be reduced. WO 2023/275106 PCT/EP2022/067820 2

The inner fan motor mount 20 includes a plurality of stoppers 10. The stoppers 10 are provided in a plurality of recesses 55 corresponding to the number of stoppers 10 of the cover 50. As shown in FIG. The stoppers 10 are made of a hard material and additionally help to reduce vibrations by forming an amplitude limit for vibrations.

During the operation of the vehicle, accidental external forces on the Ge blower system can cause the vibration amplitudes that occur to cause the known engine vibration limiter to fail in terms of noise generation and operational failure.

Brief description of the invention

The present document discloses, according to a first aspect of the invention, a fan motor mount comprising an inner fan motor mount accommodating a fan motor having a drive axle and an outer structure supporting the inner fan motor mount. The drive axis of the blower motor forms a cylindrical coordinate axis of a cylindrical coordinate system, wherein a spaced pair of surface pieces is formed at least two different ordinate distances at different radial distances to limit relative movement between the inner blower motor mount and the outer structure.

The fan motor mount according to the first aspect makes it possible to limit vibration amplitudes of the fan motor and thus limit damage to the fan motor mount due to vibration.

According to a further aspect, the spaced-apart pair of surfaces comprises at least one of an initial pair of surfaces comprising an initial abutment surface and an initial mating surface, a first pair of surfaces comprising a first abutment surface and a first mating surface, a second pair of surfaces comprising a second abutment surface and a second counter surface and a variable surface piece pair comprising a variable stop surface and a variable counter surface. The at least one spaced-apart pair of flat pieces accordingly forms a movement limitation of a stop surface of the inner blower motor mount in relation to a mating surface of the outer structure. WO 2023/275106 PCT/EP2022/067820

-3-

The fan motor mount of the foregoing aspect provides a motion limiter in at least one of a plurality of locations to limit amplitudes of vibration of the fan motor.

In one aspect, the initial patch pair is established at an initial ordinate spacing passing through an origin of the cylindrical coordinate system. The first patch pair is established at a first ordinate distance between the origin of the cylindrical coordinate system and a first point. The first point is provided at a distance from the origin of the coordinate system. Accordingly, the first ordinate distance extends between the origin of the cylinder coordinate system and the first point on the cylinder coordinate axis. The second patch pair is established at a second ordinate distance between the first point and the second point on the cylindrical coordinate axis. The variable patch pair is set at a variable ordinate distance between the first point and a third point on the cylindrical coordinate axis. Accordingly, the variable ordinate distance extends in a range between the first point on the cylinder coordinate axis and the third point on the cylinder coordinate axis.

The fan motor mounting according to the aforementioned aspect limits the vibration amplitudes of the fan motor in several areas along the cylinder coordinate axis.

In one aspect, a radial distance of the variable abutment surface changes with respect to the drive axis in the variable ordinate distance between the first point and the third point. In contrast, a radial spacing of the variable mating surface with respect to the drive axis in the variable ordinate spacing between the first point and the third point of the outer structure remains essentially constant. Accordingly, a radial distance between the variable stop surface and the variable counter surface changes in the variable ordinate distance.

The fan motor mounting according to the above aspect makes it possible to record under different vibration amplitudes along the drive axis.

In one aspect, the fan motor mount further includes decoupling members disposed between the inner fan motor mount and the outer structure to support the inner fan motor mount. WO 2023/275106 PCT/EP2022/067820

-4-

The fan motor mount according to the above aspect enables simple assembly of the inner fan motor mount comprising the fan motor in the outer structure.

In one aspect, the decoupling elements comprise a flexible material to reduce vibration amplitudes of a blower motor with an impeller. This flexibly supports the inner fan motor mount relative to the outer structure to absorb vibrations or limit noise.

The fan motor mounting according to the aforementioned aspect makes it possible to reduce vibration amplitudes or slight vibrations and the resulting noise.

In one aspect, the inner fan motor mount comprises at least one stop element, which extends in the first ordinate distance from the origin of the cylinder coordinate system to the first point and at least one extension, which extends from the at least one stop element in the variable ordinate distance to the third th point.

The fan motor mount according to the above aspect provides a motor vibration limiter which can absorb an amplitude of vibration without leading to a failure.

In one aspect, the at least one extension includes a cavity, with a protrusion extending within the cavity.

The fan motor mount according to the above aspect provides a structure through the cavity and the projection, which can absorb a higher vibration amplitude and higher forces.

In one aspect, the outer structure on the variable mating surface includes a plurality of first ribs and second ribs in a circumferential direction, the first and second ribs extending along the drive axis.

The fan motor mounting according to the above aspect provides a receiving area ready into which one of the extensions can be inserted. In one aspect, the first ribs and the second ribs each partially cover at least one extension in the radial direction. WO 2023/275106 PCT/EP2022/067820

-5-

The fan motor mount according to the above aspect provides a counter surface to the extension by the first and second ribs to limit an amplitude of vibration in the circumferential direction.

In one aspect, the fan motor mount further includes a cover, where the cover is coupled to the outer structure and has a plurality of recesses.

The fan motor mounting according to the above aspect is protected by the cover against dirt from the outside and prevents an air flow that is generated from being sucked in uncontrolled by the fan wheel.

In one aspect, each recess of the plurality of recesses accommodates a stop member of the plurality of stop members. As a result, one recess can limit a movement in the circumferential direction of one stop element in each case.

The fan motor mounting according to the aforementioned aspect can limit a movement in the circumferential direction of a respective stop element with a recess in each case.

[0030] In one aspect, the respective one stop element of the plurality of stop elements is spaced apart from the respective one recess of the plurality of recesses.

The fan motor mount according to the above aspect provides a motor vibration limiter which can absorb vibration amplitude peaks to prevent failure.

The fan motor mount can be used in a fan system to limit transmission of vibration amplitudes of a fan motor with an impeller.

The fan motor mounting according to the above aspect provides a motor vibration limiter which reduces or limits the occurrence of noise up to and including operational failure of the fan system.

Brief description of the drawings WO 2023/275106 PCT/EP2022/067820 6

A more complete understanding of the invention and many attendant advantages will be readily obtained when considered by reference to the following detailed description in conjunction with the accompanying figures.

1 shows a known fan system for a heating, ventilation and air conditioning device.

shows a sectional view through a fan system with a fan motor mounting as an embodiment of the present invention.

FIG. 3 shows a three-dimensional representation of the blower system shown in FIG.

FIG. 4 shows a schematic detailed sectional view through the fan motor bearing shown in FIGS. 2 and 3.

5 shows a second detailed sectional view of the fan motor mounting.

6 shows a third detailed sectional view of the fan motor mounting.

Detailed description of the invention

The invention will now be described with reference to the figures. It should be understood that the aspects of the invention described herein are exemplary only and do not in any way limit the scope of the claims. The invention is defined by the claims and their equivalents. It is understood that features of one aspect of the invention may be combined with a feature of another aspect or aspects of the invention, provided they are not mutually exclusive.

2 shows a sectional view through a fan system with a fan motor mount 100 as a motor vibration limiter for a heating, ventilation and air conditioning device. The blower system includes a blower motor 40, having a drive axis Z, with a fan wheel 60.

The fan wheel 60 is shown as a radial fan. The fan wheel 60 is a conventional fan wheel for a fan system of heating, ventilation and air conditioning devices in vehicles. A detailed description of the configuration of the fan wheel 60 is therefore omitted for reasons of brevity.

The fan motor 40 is housed in an internal fan motor mount 20 . The inner blower motor mount 20 is decoupling elements 23 at a WO 2023/275106 PCT/EP2022/067820

-7- outer structure 30 mounted or supported. The decoupling elements 23 to summarize a flexible material. The flexible material is, for example, one of rubber, ..., but this does not limit the invention. The flexible decoupling elements 23 can absorb vibrations and noise from the blower motor 40 with the fan wheel 60 and limit the vibrations and forces that occur from the blower motor 40 to the outer structure 30 and vice versa.

The outer structure 30 is a rigid component and supports the blower motor 40 with the fan wheel 60 via the decoupling elements 23 and the inner blower motor mount 20. The blower system can be mounted in the vehicle via the outer structure 30. A cover 50 is mounted on the outer structure 30 . The cover 50 comprises a multiplicity of recesses 55.

The inner fan motor mount 20 includes the fan motor mount 100.

Blower motor mount 100 includes at least one stop element 110, at least one extension 120, and a cavity 140 in each case.

3 shows a three-dimensional representation of the fan system. The blower motor 40 is secured by a plurality of holding elements 25 in the inner blower motor mount 20 in the axial direction. The at least one stop element 110 each includes a projection 130. The projection 130 extends radially into the cavity 140. The projection 130 also extends axially through the cavity 140. The inner blower motor mount 20 is fitted with the decoupling elements 23 into the outer structure 30 assembled.

4 shows a schematic detailed sectional view through the fan motor mount 100. The drive axis Z of the fan motor 40 forms a cylinder coordinate axis of a cylinder coordinate system ZKS. The cylindrical coordinate system ZKS comprises at least an origin 0, a first point 1, a second point 2 and a third point 3 on the drive axis Z. The first point 1 is defined at a position on the drive axis Z where the stop element 110, starting from ends from the origin 0 in the axial direction. The second point 2 is defined at a position on the drive axis Z where an end face S30 of the outer structure 30 is located. The cover 50 contacts the face S30 when the cover 50 is assembled to the outer structure 30. FIG. The third point 3 is defined at a position on the drive axis Z up to which Rather, the extension 120 extends in the axial direction, starting from the stop element 110.

Starting from the origin 0, an ordinate distance LZ extends in the axial direction. If the distance of the ordinate distance LZ from the origin 0 is equal to zero, this is an initial ordinate distance LZ0. If the distance of the ordinate distance LZ from the origin is 0 in an area between the origin 0 and the first point 1, it is a first ordinate distance LZ1 (0<=LZ<=1). If the distance of the ordinate distance LZ from the origin 0 is equal to the first point 1, this is a maximum first ordinate distance LZlm (LZ=1). If the distance of the ordinate distance LZ from the origin is 0 in an area between the first point 1 and the second point 2, this is a second ordinate distance LZ2 (1<=LZ<=2). The ordinate distance LZ2 between the first point 1 and the second point 2 is also referred to as the second axial difference AD2 (see FIG. 5). If the distance of the ordinate distance LZ from the origin is 0 in an area between the second point 2 and the third point 3, it is a variable ordinate distance LZz (2 <= LZ <= 3). The blower motor mount 100 is therefore divided into three areas along the drive axis Z.

[0050] Between the inner blower motor mount 20 and the outer structure 30, a spaced pair of surface pieces FP is formed at each ordinate distance LZ with a different radial distance. Each spaced patch pair FP includes a stop surface A on the inner fan motor mount 20 and a mating surface G on the outer structure 30. The extent of stop surface A and mating surface G is minimal and converges to zero.

The spaced patch pair FP comprises at least one of an initial patch pair FP0, a first patch pair FP1, a second patch pair FP2, and a variable patch pair FPz.

The initial pair of surface pieces FP0 is located at the initial ordinate distance LZ0 and includes an initial stop surface A0 and an initial mating surface G0. The first pair of surface pieces FP1 is in the first ordinate distance LZ1 and includes a first stop surface Al and a first mating surface Gl. The second pair of surface pieces FP2 is in the second ordinate distance LZ2 and includes a second stop surface A2 and a second mating surface G2. The variable patch pair FPz is located WO 2023/275106 PCT/EP2022/067820

-9- in the variable ordinate distance LZz and includes a variable stop surface A3z and a variable counter surface G3z.

The spaced-apart pair of surface pieces FP can oppose one another in a transverse plane lying transversely to the drive axis Z or in a radial plane lying parallel to the drive axis Z. A plane parallel to and at an axial distance from the transverse plane is also a transverse plane. A plane parallel to and at a radial distance from the radial plane is also a radial plane.

For example, the first patch pair FPf and the variable patch pair FPz are oriented in the radial plane. In contrast, the initial pair of patches FPO and the second pair of patches FP2 are oriented in the transverse plane.

The radial distance, ie the respective distance in the radial direction from the drive axis Z to the stop surface A in the respective ordinate distance LZ, is dependent on the respective ordinate distance LZ. A radial distance Ri of the first stop face Al with respect to the drive axis Z in the first ordinate distance LZ1 between the origin 0 and the first point 1 remains essentially constant, for example. A radial distance Rz of the variable stopper surface A3z variably changes with respect to the drive axis Z in the variable ordinate distance LZz between the first point 1 and the third point 3 along the axial direction. Consequently, a variable radial distance RDz changes between the variable stop surface A3z and the variable counter surface G3z. The variable radial distance RDz increases from the second point 2 to the third point 3.

5 shows a second detailed sectional view of the fan motor mounting. The stop element 110 is spaced from the recess 55 of the cover 50 in the axial direction by a first axial distance AD1 and in the radial direction by a first radial distance RD1. The stop member 110 is spaced from the outer structure 30 by the second axial distance AD2. Extension 120 is spaced from outer structure 30 by variable radial distance RDz. The respective stop surface A and the opposite surface G of each pair of surface pieces FP do not touch each other when the blower system is at a standstill.

In Fig. 6 is a third detailed sectional view of the fan motor mounting through a plane X in Fig. 5 is shown. The outer structure 30 has a plurality of first ribs 32 and second ribs 34 in the circumferential direction on the variable counter surface G3z. WO 2023/275106 PCT/EP2022/067820 10 wherein the first and second ribs 32, 34 extend along the drive axis Z. This provides a receiving area in which one of the extensions 120 can be received.

The first rib 32 and the second rib 34 each partially cover the extension 120 in the radial direction. Between the ribs 32, 34 and the extension 120 there is a first circumferential distance UD1 and a second circumferential distance UD2. The first circumferential distance UD1 and the second circumferential distance UD2 are the same when the fan system is at a standstill. Consequently, the extension 120 and the outer structure 30 do not touch when stationary. The first and second ribs 32, 34 serve as mating surfaces for the extension 120 and limit or reduce the vibration amplitudes in the circumferential direction during operation.

If, during operation of the fan system, dynamic reactions of the fan system such as vibration amplitudes occur due to static and dynamic imbalances of the rotating masses or randomly generated external forces on the fan system due to the interaction between the vehicle and the environment, these vibration amplitudes can exceed the decoupling elements 23 are added. The vibration amplitudes are limited over the axial distances AD1, AD2, the radial distances RD1, RDz and the circumferential distances UD1, UD2.

By limiting or reducing the vibration amplitude by the fan motor mounting 100 described, the decoupling elements 23 are protected from damage and consequently the fan system is protected from failure in several transverse and radial planes that are spaced apart and offset.

WO 2023/275106 PCT/EP2022/067820 11

Reference sign

10 stoppers

20 inner blower motor mount

23 decoupling elements

25 holding element

30 outer structure

32 first rib

34 second rib

40 blower motor

50 coverage

55 recess

60 fan wheel

100 blower motor mount

110 stop element

120 extension

130 lead

140 cavity

FP patch pair

A stop surface

G counter surface

LZ ordinate distance

AD axial distance

Rz radial from stand

RD radial distance

UD Circumferential Distance

ZKS cylindrical coordinate system

Z drive axis

Claims

WO 2023/275106 PCT/EP2022/067820 12 claims

A fan motor mount (100) comprising an inner fan motor mount (20) receiving a fan motor (40) having a drive axle (Z) and an outer structure (30) supporting the inner fan motor mount (20), the drive axle (Z) of the fan motor (40) forms a cylinder coordinate axis of a cylinder coordinate system (ZKS), wherein to limit a relative movement between the inner fan motor mount (20) and the outer structure (30) at at least two different ordinate distances (LZ) with different radial distances, a spaced pair of surfaces is used (FP) is formed.

2. Fan motor mounting (100) according to claim 1, wherein the spaced-apart pair of surfaces (FP) comprises at least one of an initial pair of surfaces (FP0) comprising an initial abutment surface (A0) and an initial mating surface (G0), a first pair of surfaces (FP1) , comprising a first stop surface (Al) and a first mating surface (Gl), a second pair of flat pieces (FP2), comprising a second stop surface (A2) and a second mating surface (G2) and a variable pair of flat pieces (FPz), comprising a variable Stop surface (A3z) and a variable counter surface (G3z) includes.

3. Blower motor mounting (100) according to claim 2, in which the initial pair of surface pieces (FP0) is set up in an initial ordinate distance (LZ0) running through an origin (0) of the cylindrical coordinate system (ZKS), the first pair of surface pieces (FP1) in a first ordinate distance (LZ1) between the origin (0) of the cylindrical coordinate system (ZKS) and a first point (1) is set up (0 <= LZ <= 1), the second surface piece pair (FP2) in a second ordinate distance (LZ2) is established between the first point (1) and a second point (2) (1 <= LZ <= 1), and WO 2023/275106 PCT/EP2022/067820

-13- the variable patch pair (FPz) is set up at a variable ordinate distance (LZz) between the first point (1) and a third point (3) (1<=LZ<=3).

4. Blower motor mounting (100) according to claims 1 to 3, in which a radial distance (Rz) of the variable stop surface (A3z) with respect to the drive axis (Z) was in the variable ordinate distance (LZz) between the first point (1) and the third Point (3) changes variably.

5. fan motor mount (100) according to any one of the preceding claims, further comprising

Decoupling elements (23) arranged between the inner fan motor mount (20) and the outer structure (30) to support the inner fan motor mount (20).

6. fan motor mounting (100) according to claim 5, wherein the decoupling elements (23) comprise a flexible material to reduce vibration amplitudes of the fan motor (40) with a fan wheel (60).

7. Blower motor mount (100) according to Claim 1 to 6, in which the inner blower motor mount (20) comprises: at least one stop element (110), located in the first ordinate distance (LZ1) from the origin (0) of the cylinder coordinate system (ZKS) to the first th point (1) extending; and at least one extension (120) extending from the at least one stop element (110) in the variable ordinate distance (LZz) to the third point (3).

The fan motor mount (100) of claim 7, wherein the at least one extension (120) includes a cavity (140) with a projection (130) extending within the cavity. WO 2023/275106 PCT/EP2022/067820

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9. Blower motor mounting (100) according to any one of the preceding claims, in which the outer structure (30) on a / the variable counter surface (G3z) has a plurality of first ribs (32) and second ribs (34) along the drive axis ( Z) extending in the circumferential direction.

10. Blower motor mounting (100) according to claim 9, wherein the first ribs (32) and the second ribs (34) each partially cover at least one extension (120) in the radial direction.

11. Fan motor mount (100) according to any one of the preceding claims, further comprising: a cover (50), the cover (50) being coupled to the outer structure (30) and having a plurality of recesses (55).

12. Fan motor mount (100) according to claim 11, wherein each recess (55) of the plurality of recesses (55) each receive a stop member (110) of a plurality of stop members (110).

13. Blower motor mount (100) according to claim 12, wherein the respective one stop element (110) of the plurality of stop elements (110) is spaced from the respective one recess (55) of the plurality of recesses (55).

14. Use of the fan motor mounting (100) according to any one of the preceding claims in a fan system in order to limit the transmission of vibration amplitudes of a fan motor (40) with a fan wheel (60).