WO2020017433A1

WO2020017433A1 - Air conditioning device

Info

Publication number: WO2020017433A1
Application number: PCT/JP2019/027550
Authority: WO
Inventors: 享草田; 哲也百武; 健司手島; 知久江坂; 西川　克巳; 生田　晴樹; 桂三後藤; 英一羽佐田
Original assignee: 株式会社デンソー
Priority date: 2018-07-20
Filing date: 2019-07-11
Publication date: 2020-01-23
Also published as: JP2020011694A

Abstract

A motor holder (40) for a fan (20) includes: a tubular portion (41) in the shape of a tube which is disposed in a hole portion (10a) formed in an air conditioning case and which forms a motor accommodating space (410); a tubular duct portion (42) which communicates with the accommodating space and which extends from the tubular portion in a direction intersecting a rotation center line (20a) of the fan; and a tubular air introduction opening (43) which extends from the duct portion toward a ventilation passage for introducing a portion of air flowing through the ventilation passage into the duct portion. The air conditioning case includes a tubular air passage forming portion (190) which extends from the ventilation passage toward the air introduction opening, and which forms an air passage (18) for guiding said portion of the air flowing through the ventilation passage to the air introduction opening, wherein an inner circumferential surface of the air passage forming portion and an outer circumferential surface of the air introduction opening are in contact with one another and the air introduction opening is fixedly supported in the air passage forming portion, and the outer circumferential surface of the air introduction opening and the inner circumferential surface of the air passage forming portion are inclined in such a way as to move away from a centerline of the air passage with increasing distance in a direction moving away from the ventilation passage.

Description

Air conditioner

Cross-reference to related application

This application is based on Japanese Patent Application No. 2018-137126 filed on July 20, 2018, the disclosure of which is incorporated herein by reference.

The present disclosure relates to an air conditioner including an air conditioning case and a motor holder.

Conventionally, there is a motor holder described in Patent Literature 1 as a motor holder for attaching a motor to an air conditioning case of an air conditioner. This motor holder has an air passage for introducing air outside the holder main body inside the holder main body for holding the motor, and air is introduced into the holder main body through the air passage and the motor is driven. It is designed to be cooled.

JP-A-2002-204547

The inventor assumed an air conditioner 1a including the air conditioning case 10 and the motor holder 40 shown in FIG. The motor holder 40 has a cylindrical tubular portion 41 forming a housing space 410 for housing the motor 30, a cylindrical duct portion 42 communicating with the housing space 410 and extending radially outward of the cylindrical portion 41. ,have. Further, the motor holder has a cylindrical air inlet 43 projecting from the duct portion 42 so as to approach the air conditioning case 10 and introducing a part of the air flowing through the ventilation passage 11 into the duct portion 42. In addition, the air conditioning case 10 has a cylindrical air passage forming portion 190 projecting from the ventilation passage 11 toward the air introduction port 43 and connecting the ventilation passage 11 and the air introduction port 43.

The motor holder 40 is fixed to the air conditioning case 10 by the plurality of screws 71, and the inner peripheral surface of the air passage forming portion 190 and the outer peripheral surface of the air inlet 43 come into contact with each other.

By the way, in recent years, in particular, the noise in the vehicle interior has been reduced, and various noises entering the vehicle interior and the blowing noise of the air conditioner have been reduced. Is coming.

Therefore, the present inventors studied magnetic noise generated by vibration of a motor. As a result, the air conditioner 1a shown in FIG. 18 has a configuration in which the outer peripheral surface of the air inlet 43 and the inner peripheral surface of the air passage forming portion 190 are simply in contact with each other. The frictional force of the contact portion of the portion 190 cannot be sufficiently obtained. For this reason, when the motor vibrates due to the magnetic excitation force of the motor, the air inlet 43 resonates in a cantilever state, and the vibration transmitted to the air conditioning case increases, and a large magnetic sound is radiated from the air conditioning case. I understood that.

The present disclosure aims to reduce noise radiated from an air conditioning case.

According to one aspect of the present disclosure, an air conditioner that performs air conditioning in a vehicle interior includes an air conditioning case that forms a ventilation path through which air blown into the vehicle interior flows, and a motor that rotates a fan that generates an air flow. A motor holder for fixing the motor to the air-conditioning case, the motor holder being disposed in a hole formed in the air-conditioning case, forming a housing space for housing the motor, and a housing space. And a tubular duct extending from the tubular portion in a direction intersecting the rotation center line of the fan, and a portion of the air extending from the duct toward the ventilation passage and flowing through the ventilation passage is introduced into the duct portion. The air-conditioning case has a cylindrical air inlet, and the air-conditioning case extends from the air passage toward the air inlet and forms an air passage that guides a part of the air flowing through the air passage to the air inlet. Air vent An inner surface of the air passage forming portion and an outer peripheral surface of the air inlet are in contact with each other, and the air inlet is supported and fixed to the air passage forming portion. The inner peripheral surface of the forming portion is inclined so as to become farther away from the center line of the air passage as the cross-sectional shape of the cross section including the center line of the air passage advances in the direction away from the ventilation passage in the direction of the center line of the air passage.

According to such a configuration, the outer peripheral surface of the air inlet and the inner peripheral surface of the air passage forming portion have a cross-sectional shape including a center line of the air passage that is away from the ventilation passage in the center line direction of the air passage. When the air inlet is fixedly supported by the air passage forming part, the outer peripheral surface of the air inlet and the inner peripheral surface of the air passage forming part contact each other when the air inlet is fixedly supported by the air passage forming part. The frictional force of the part increases. Therefore, the vibration in the cantilever state of the air inlet due to the vibration of the magnetic excitation force of the motor is reduced, so that the propagation from the motor holder to the air conditioning case is suppressed, and the noise radiated from the air conditioning case can be reduced. it can.

Note that the reference numerals in parentheses attached to the respective components and the like indicate an example of the correspondence between the components and the like and the specific components and the like described in the embodiments described later.

It is sectional drawing of the air conditioning case of the air conditioner which concerns on 1st Embodiment. FIG. 2 is a plan view of the motor holder as viewed from a direction II in FIG. 1. It is a schematic diagram of the air conditioner according to the first embodiment. FIG. 2 is an enlarged view of a portion V in FIG. 1, showing a state before an air inlet and an air passage forming portion are fitted. FIG. 2 is an enlarged view of a portion V in FIG. 1, showing a state after an air inlet and an air passage forming portion are fitted. It is an enlarged view of V part of the air conditioner of a 2nd embodiment. It is an enlarged view of V part of the air conditioner of a 3rd embodiment. It is an enlarged drawing of V part of the air conditioner of a 4th embodiment. It is an enlarged view of V part of the air conditioner of a 5th embodiment. It is an enlarged drawing of the V section of the air conditioner of a 6th embodiment. It is the figure which showed the state before fitting the air inlet and the air passage formation part of the air conditioner of 7th Embodiment. It is the figure which showed the state after fitting the air inlet and the air passage formation part of the air conditioner of 7th Embodiment. It is an enlarged drawing of V part of an air conditioner of an 8th embodiment. It is an enlarged drawing of the V section of the air conditioner of a ninth embodiment. It is an enlarged view of V part of the air conditioner of a 10th embodiment. It is an enlarged view of the V section of the air conditioner of the eleventh embodiment. It is an enlarged view of V part of the air conditioner of a 12th embodiment. It is sectional drawing of the air conditioning case of an air conditioner, and is a figure for demonstrating a subject.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent are denoted by the same reference numerals in the drawings.

(1st Embodiment)
An air conditioner according to a first embodiment will be described with reference to FIGS. The air conditioner 1 according to the present embodiment is mounted on a vehicle, sucks one or both of inside air, which is air inside the vehicle, and outside air, which is air outside the vehicle, adjusts the temperature and humidity of the air that has been sucked, and adjusts the temperature and humidity of the air. By blowing air into the vehicle, air conditioning in the cabin is performed.

空調 As shown in FIG. 3, the air conditioner 1 includes an air conditioning case 10, a fan 20, a motor 30, a motor holder 40, and the like.

The air-conditioning case 10 is formed of a resin having a certain degree of elasticity and excellent strength. As a resin forming the air-conditioning case 10, for example, polypropylene is used. The air-conditioning case 10 forms a ventilation path 11 through which air blown into the vehicle compartment flows.

The air-conditioning case 10 introduces an inside air inlet 12 for introducing inside air into the ventilation passage 11 from a predetermined location in the vehicle cabin at a location on the upstream side of the ventilation passage 11 in the air flow direction, and introduces outside air from outside the vehicle to the ventilation passage 11. Has an outside air inlet 13. Note that a duct (not shown) formed as a member separate from the air conditioning case 10 may be connected to the inside air inlet 12 or the outside air inlet 13. In that case, air is introduced into the ventilation passage 11 from the inside air inlet 12 or the outside air inlet 13 via those ducts.

The air-conditioning case 10 has a plurality of

outlets

14, 15, 16 for blowing air from the ventilation passage 11 into the vehicle compartment on the downstream side of the ventilation passage 11 in the air flow direction. The air flowing through the ventilation passage 11 of the air conditioning case 10 is blown into the passenger compartment from the plurality of

outlets

14, 15, 16. The plurality of

blowout openings

14, 15, 16 are constituted by a face blowout opening 14, a foot blowout opening 15, and a defroster blowout opening 16. The face blowout opening 14 blows out conditioned air toward the upper body of the occupant seated in the front seat or around the upper body. The foot outlet 15 blows out conditioned air toward the feet of the occupant. The defroster blowing opening 16 blows out conditioned air toward the windshield of the vehicle.

Note that a duct (not shown) configured as a separate member from the air conditioning case 10 may be connected to each of the plurality of

blowout openings

14, 15, 16. In that case, air is blown into the vehicle cabin from the plurality of

blowout openings

14, 15, 16 via those ducts.

内 Inside and outside of the air conditioning case 10, the inside / outside air switching door 17, the fan 20, the evaporator 50, the heater core 51, the temperature adjustment door 52, the

mode switching doors

53, 54, 55 and the like are provided.

The inside / outside air switching door 17 is for continuously adjusting the opening area of the inside air introduction port 12 and the opening area of the outside air introduction port 13. The inside / outside air switching door 17 rotates so as to open one of the inside air inlet 12 and the outside air inlet 13 so as to close the other. Thus, the inside / outside air switching door 17 can adjust the ratio of the amount of air between the inside air and the outside air introduced into the ventilation passage 11.

遠心 A centrifugal fan is employed as the fan 20 of the present embodiment. The fan 20 generates a flow of air in the ventilation passage 11. The motor 30 for rotating the fan 20 is housed in a housing space 410 provided in the motor holder 40 fixed to the air conditioning case 10. The fan 20 is fixed to a rotation shaft of the motor 30. The fan 20 and the motor 30 constitute a blower.

(4) When the fan 20 rotates with the driving of the motor 30, an airflow is generated in the ventilation path 11. Thereby, inside air or outside air is introduced into the ventilation path 11 from the inside air inlet 12 or the outside air inlet 13. The air blown by the fan 20 and flowing through the ventilation path 11 is adjusted in temperature and humidity by the evaporator 50 and the heater core 51, and passes through any one of the plurality of

blowout openings

14, 15, 16 communicating with the ventilation path 11. It is blown out into the cabin.

The evaporator 50 is a heat exchanger for cooling the air flowing through the ventilation passage 11. The evaporator 50 constitutes a well-known refrigeration cycle together with a compressor, a condenser, an expansion valve, and the like (not shown). The evaporator 50 is disposed downstream of the expansion valve and upstream of the compressor in the refrigeration cycle. The evaporator 50 exchanges heat between the low-temperature and low-pressure refrigerant flowing inside the tube (not shown) and the air passing through the evaporator 50, and cools the air passing through the evaporator 50 by an endothermic effect of the latent heat of evaporation of the refrigerant. .

The heater core 51 is a heat exchanger for heating the air flowing through the ventilation passage 11. Engine cooling water flows inside a tube (not shown) of the heater core 51. The heater core 51 exchanges heat between the engine cooling water flowing inside the tube and the air passing through the heater core 51 to heat the air passing through the heater core 51.

温度 A temperature adjusting door 52 is provided between the evaporator 50 and the heater core 51. The temperature adjusting door 52 adjusts the ratio between the amount of air flowing around the heater core 51 after passing through the evaporator 50 and the amount of air flowing through the heater core 51 after passing through the evaporator 50.

The

mode switching doors

53, 54, 55 for adjusting the opening areas of the face blowout opening 14, the foot blowout opening 15, and the defroster blowout opening 16 are provided. The

mode switching doors

53, 54, and 55 include a face door 53, a foot door 54, and a defroster door 55. The face door 53 opens and closes the face blowing opening 14. The foot door 54 opens and closes the foot opening 15. The defroster door 55 opens and closes the defroster blowing opening 16.

As shown in FIGS. 1 and 2, the motor holder 40 is for fixing the motor 30 for rotating the fan 20 for generating the air flow to the air conditioning case 10. The motor holder 40 is arranged in a hole 10 a provided in the air conditioning case 10.

A plurality of flanges 47 projecting radially outward are provided on the outer periphery of the bottom side of the motor holder 40. The flange portion 47 is provided with a hole 471 communicating with the thickness direction.

On the other hand, a plurality of support portions 19 extend from the air conditioning case 10 at positions corresponding to the plurality of flange portions 47. The plurality of support portions 19 abut against the corresponding flange portions 47, respectively. A female screw 101 is formed in a portion of the support portion 19 that comes into contact with the flange portion 47.

ねじ A screw 71 is inserted into a hole 471 of the flange portion 47, and the screw 71 is screwed into a female screw 101 provided on the support portion 19, so that the motor holder 40 is fixed to the air conditioning case 10.

凸 Further, the air-conditioning case 10 is formed with a convex portion 90, and the motor holder 40 is formed with a groove portion 80. By fitting the convex portion 90 formed in the air conditioning case 10 and the groove portion 80 formed in the cylindrical portion 41, wind leakage and water leakage between the air conditioning case 10 and the motor holder 40 are suppressed. It has become.

The motor holder 40 has a cylindrical portion 41, a duct portion 42, and an air inlet 43. The tubular portion 41, the duct portion 42, and the air inlet 43 are integrally formed of a resin material that is an elastic member.

The cylindrical portion 41 forms a housing space 410 for housing the motor 30. The tubular portion 41 is formed in a bottomed cylindrical shape so that the motor 30 can be accommodated. The fan 20 is arranged in the ventilation path 11, and the motor 30 is arranged in the accommodation space 410.

The duct portion 42 is for introducing a part of the air flowing through the ventilation passage 11 into the housing space 410, and has a cylindrical shape. The duct part 42 forms an air passage 45 through which air flows. The duct portion 42 communicates with the accommodation space 410 and extends from the tubular portion 41 in a direction intersecting the rotation center line 20 a of the fan 20. Specifically, the duct portion 42 is formed so as to extend from the tubular portion 41 in a radially outward direction of the tubular portion 41.

(4) The duct portion 42 has a protruding portion 421a that protrudes in a direction intersecting with the rotation center line 20a of the fan 20. More specifically, the duct portion 42 is formed with a protruding portion 421a that protrudes radially outward of the cylindrical portion 41.

The air inlet 43 is for introducing a part of the air flowing through the ventilation passage 11 into the duct portion 42, and has a cylindrical shape. The air inlet 43 forms an air passage 46 through which air flows. The air inlet 43 extends from the duct portion 42 toward the ventilation passage 11.

On the other hand, the air conditioning case 10 has a cylindrical air passage forming portion that extends from the ventilation passage 11 toward the air introduction port 43 and forms an air passage 18 that guides a part of the air flowing through the ventilation passage 11 to the air introduction port 43. 190. The air passage forming portion 190 is made of a resin that is an elastic member.

Then, the inner peripheral surface of the air passage forming portion 190 and the outer peripheral surface of the air inlet 43 come into contact with each other so that the air inlet 43 is supported and fixed to the air passage forming portion 190.

FIG. 4 is a view showing a state before the air inlet 43 and the air passage forming part 190 are fitted, and FIG. 5 is a view after the air inlet 43 and the air passage forming part 190 are fitted. It is a figure showing a state. 4 and 5, the inner diameter side indicates the radially inner side of the cylindrical portion 41, and the outer diameter side in FIGS. 4 and 5 indicates the radially outer side of the cylindrical portion 41.

As shown in FIG. 4, the outer peripheral surface on the inner diameter side of the air inlet 43 has a cross-sectional shape including a center line 18 a of the air passage 18 in a direction away from the ventilation passage 11 in the center line 18 a direction of the air passage 18. As it proceeds, it is inclined away from the center line 18 a of the air passage 18.

The outer peripheral surface on the outer diameter side of the air inlet 43 has a cross-sectional shape including a center line 18 a of the air passage 18 in parallel with the center line 18 a of the air passage 18.

Then, as shown in FIG. 5, when the air passage forming portion 190 is press-fitted into the air introduction port 43, the air passage forming portion 190 is elastically deformed. The outer peripheral surface on the inner diameter side of the air inlet 43 and the inner peripheral surface on the inner diameter side of the air passage forming portion 190 are inclined in cross section including the center line 18 a of the air passage 18. Specifically, the air passage 18 is inclined away from the center line 18a of the air passage 18 as it advances away from the ventilation passage 11 in the direction of the center line 18a of the air passage 18.

Accordingly, when the air introduction port 43 is fixedly supported by the air passage formation section 190, the air introduction port 43 receives a force from the air passage formation section 190 toward the center of the air introduction port 43. Therefore, a frictional force can be generated between the contact portion between the outer peripheral surface on the inner diameter side of the air inlet 43 and the inner peripheral surface on the inner diameter side of the air passage forming portion 190.

That is, the frictional force at the contact portion between the outer peripheral surface on the inner diameter side of the air inlet 43 and the inner peripheral surface on the inner diameter side of the air passage forming portion 190 increases. Then, since the vibration of the air inlet 43 in the cantilever state due to the vibration of the magnetic excitation force of the motor 30 is reduced, the propagation from the motor holder 40 to the air conditioning case 10 is suppressed, so that the air is radiated from the air conditioning case. Noise is reduced.

In a state where the air passage forming portion 190 is press-fitted into the air introduction port 43, a gap is provided between the tip of the air passage forming portion 190 and the protruding portion 421a. , And not in contact with the protrusion 421a. In addition, a gap is provided between the tip of the air passage forming portion 190 and the outer peripheral surface 421b of the duct portion 42, and the tip of the air passage forming portion 190 is not in contact with the outer peripheral surface 421b of the duct portion 42. .

As described above, the present air conditioner is an air conditioner that performs air conditioning in a vehicle compartment, and includes the air conditioning case 10 that forms a ventilation path 11 through which air blown into the vehicle compartment flows. Further, a motor holder 40 for fixing the motor 30 for rotating the fan 20 for generating the air flow to the air conditioning case 10 is provided.

The motor holder 40 has a cylindrical portion 41 which is arranged in the hole 10 a formed in the air conditioning case 10 and forms a housing space 410 for housing the motor 30. In addition, it has a cylindrical duct portion 42 communicating with the housing space 410 and extending from the cylindrical portion 41 in a direction intersecting the rotation center line 20 a of the fan 20. Further, it has a cylindrical air inlet 43 that extends from the duct portion 42 toward the ventilation passage 11 and introduces a part of the air flowing through the ventilation passage 11 into the duct portion 42.

The air-conditioning case 10 has a cylindrical air passage forming portion that extends from the ventilation passage 11 toward the air introduction port 43 and forms an air passage 18 that guides a part of the air flowing through the ventilation passage 11 to the air introduction port 43. 190. Further, the inner peripheral surface of the air passage forming portion 190 and the outer peripheral surface of the air introduction port 43 are in contact with each other, and the air introduction port 43 is supported and fixed to the air passage forming portion 190.

外周 The outer peripheral surface of the air inlet 43 and the inner peripheral surface of the air passage forming portion 190 are inclined in cross section including the center line 18 a of the air passage 18. Specifically, the air passage 18 is inclined away from the center line 18a of the air passage 18 as it goes away from the ventilation passage 11 in the direction of the center line 18a of the air passage 18.

Thereby, when the air introduction port 43 is fixedly supported by the air passage forming section 190, the frictional force of the contact portion between the outer peripheral surface of the air introduction port 43 and the inner peripheral surface of the air passage forming section 190 increases. Then, the vibration of the air inlet 43 in the cantilever state due to the vibration of the magnetic excitation force of the motor 30 is reduced, whereby the propagation from the motor holder 40 to the air conditioning case 10 is suppressed, and the noise radiated from the air conditioning case 10 is reduced. Can be reduced.

In the air conditioner of the present embodiment, the air passage forming portion 190 is formed of an elastic member, and the air passage forming portion 190 is elastically deformed and fitted to the air inlet 43.

As described above, since the air passage forming portion 190 is elastically deformed and fitted to the air introduction port 43, the friction between the outer peripheral surface of the air introduction port 43 and the inner peripheral surface of the air passage forming portion 190 is further increased. Power can be increased.

(2nd Embodiment)
An air conditioner according to the second embodiment will be described with reference to FIG. In the air conditioner according to the first embodiment, the outer peripheral surface on the inner diameter side of the air inlet 43 is inclined, and the outer peripheral surface on the outer diameter side of the air inlet 43 is not inclined. On the other hand, in the air conditioner of the present embodiment, both the outer peripheral surface on the inner diameter side and the outer peripheral surface on the outer diameter side of the air introduction port 43 are inclined.

Specifically, the outer peripheral surface on the inner diameter side of the air inlet 43 is such that as the cross-sectional shape of the cross section including the center line 18 a of the air passage 18 advances in the direction away from the ventilation passage 11 in the direction of the center line 18 a of the air passage 18. The air passage 18 is inclined away from the center line 18a.

Further, the outer peripheral surface on the outer diameter side of the air inlet 43 also has a larger air passage as the cross-sectional shape including the center line 18 a of the air passage 18 advances in the direction away from the ventilation passage 11 in the direction of the center line 18 a of the air passage 18. 18 are inclined away from the center line 18a.

と Then, when the air passage forming portion 190 is press-fitted into the air introduction port 43, the air passage forming portion 190 is elastically deformed. The outer peripheral surface on the inner diameter side of the air inlet 43 and the inner peripheral surface on the inner diameter side of the air passage forming portion 190 are each inclined in cross section including the center line 18 a of the air passage 18. Specifically, the air passage 18 is inclined away from the center line 18a of the air passage 18 as it advances away from the ventilation passage 11 in the direction of the center line 18a of the air passage 18. Further, the outer peripheral surface on the outer diameter side of the air inlet 43 and the inner peripheral surface on the outer diameter side of the air passage forming portion 190 are each inclined in cross section including the center line 18 a of the air passage 18. Specifically, the air passage 18 is inclined away from the center line 18a of the air passage 18 as it advances away from the ventilation passage 11 in the direction of the center line 18a of the air passage 18.

Thereby, the frictional force between the contact portion between the outer peripheral surface on the inner diameter side of the air inlet 43 and the inner peripheral surface on the inner diameter side of the air passage forming portion 190 is increased, and the outer peripheral surface on the outer diameter side of the air inlet 43 is The frictional force at the contact portion of the inner peripheral surface on the outer diameter side of the passage forming portion 190 increases. Therefore, the vibration in the cantilever state of the air inlet 43 due to the vibration of the magnetic excitation force of the motor 30 is further reduced, so that the propagation from the motor holder 40 to the air conditioning case 10 is further suppressed, and the air is radiated from the air conditioning case. Noise is further reduced.

では In the present embodiment, the same effects provided by the configuration common to the first embodiment can be obtained in the same manner as in the first embodiment.

(Third embodiment)
An air conditioner according to a third embodiment will be described with reference to FIG. In the air conditioner of the present embodiment, the outer peripheral surface on the outer diameter side of the air inlet 43 is inclined, and the outer peripheral surface on the inner diameter side of the air inlet 43 is not inclined.

Specifically, the outer peripheral surface on the outer diameter side of the air introduction port 43 has a cross-sectional shape including a center line 18 a of the air passage 18 in a direction away from the ventilation passage 11 in a direction of the center line 18 a of the air passage 18. As a result, the air passage 18 is inclined away from the center line 18a.

The outer peripheral surface on the inner diameter side of the air inlet 43 has a cross-sectional shape including a center line 18 a of the air passage 18 in parallel with the center line 18 a of the air passage 18.

Then, when the air passage forming portion 190 is press-fitted into the air introduction port 43, the air passage forming portion 190 is elastically deformed, and the outer peripheral surface of the outer diameter side of the air introduction port 43 and the outer diameter side of the air passage forming portion 190 Each of the inner peripheral surfaces has a slanted cross-sectional shape including the center line 18a of the air passage 18. Specifically, the air passage 18 is inclined away from the center line 18a of the air passage 18 as it advances away from the ventilation passage 11 in the direction of the center line 18a of the air passage 18.

Thereby, the frictional force between the outer peripheral surface on the outer diameter side of the air inlet 43 and the inner peripheral surface on the outer diameter side of the air passage forming portion 190 increases. Therefore, the vibration of the air inlet 43 in the cantilever state due to the vibration of the magnetic excitation force of the motor 30 is reduced, so that the propagation from the motor holder 40 to the air conditioning case 10 is suppressed, and the noise radiated from the air conditioning case is reduced. Reduced.

(Fourth embodiment)
An air conditioner according to a fourth embodiment will be described with reference to FIG. In the air conditioner according to the first embodiment, the distal end of the air passage forming portion 190 does not contact the protruding portion 421a, and the distal end of the air passage forming portion 190 does not contact the outer peripheral surface 421b of the duct portion 42. On the other hand, in the air conditioner of the present embodiment, the tip of the air passage forming portion 190 and the protruding portion 421a are in contact. Further, the tip of the air passage forming portion 190 and the outer peripheral surface 421b of the duct portion 42 are in contact.

This improves the sealing performance between the tip of the air passage forming portion 190 and the protruding portion 421a. Further, the sealing performance between the tip of the air passage forming portion 190 and the outer peripheral surface 421b of the duct portion 42 is improved, and furthermore, the magnetic sound transmitted from the motor holder 40 to the air conditioning case 10 can be suppressed.

(Fifth embodiment)
An air conditioner according to a fifth embodiment will be described with reference to FIG. In the air conditioner of the present embodiment, as compared with the air conditioner of the second embodiment, the tip of the air passage forming portion 190 and the protruding portion 421a abut, and the tip of the air passage forming portion 190 and the The difference is that the outer peripheral surface 421b is in contact with the outer peripheral surface 421b.

(Sixth embodiment)
An air conditioner according to the sixth embodiment will be described with reference to FIG. In the air conditioner of the present embodiment, as compared with the air conditioner of the third embodiment, the tip of the air passage forming portion 190 and the protruding portion 421a are in contact with each other, and the tip of the air passage forming portion 190 and the The difference is that the outer peripheral surface 421b is in contact with the outer peripheral surface 421b.

(Seventh embodiment)
An air conditioner according to a seventh embodiment will be described with reference to FIGS. The air conditioners of the first to sixth embodiments are configured such that when the air passage forming portion 190 is press-fitted into the air introduction port 43, the air passage forming portion 190 is elastically deformed. On the other hand, the air conditioner of the present embodiment is configured such that when the air passage forming portion 190 is press-fitted into the air inlet 43, the air inlet 43 is elastically deformed.

では In a state before the air passage forming portion 190 is press-fitted into the air introduction port 43, the inner peripheral surface on the inner diameter side of the air passage forming portion 190 is inclined as shown in FIG. Specifically, the inner peripheral surface on the inner diameter side of the air passage forming portion 190 has a sectional shape including a center line 18 a of the air passage 18 in a direction away from the ventilation passage 11 in the direction of the center line 18 a of the air passage 18. As it proceeds, it is inclined away from the center line 18 a of the air passage 18.

The inner peripheral surface on the outer diameter side of the air passage forming portion 190 has a cross-sectional shape including a center line 18 a of the air passage 18 as the sectional shape of the center line 18 a of the air passage 18 advances in a direction away from the ventilation passage 11. It is parallel to the center line 18 a of the air passage 18.

Then, when the air passage forming portion 190 is press-fitted into the air inlet 43, the air inlet 43 is elastically deformed as shown in FIG. The cross-sectional shape of the cross section including the center line 18a is inclined. Specifically, the air passage 18 is inclined away from the center line 18a of the air passage 18 as it advances away from the ventilation passage 11 in the direction of the center line 18a of the air passage 18.

The inner circumferential surface on the inner diameter side of the air passage forming portion 190 has a larger cross-sectional shape including a center line 18 a of the air passage 18 as the air passage 18 advances in a direction away from the ventilation passage 11 in the center line 18 a direction of the air passage 18. The passage 18 is inclined away from the center line 18a.

This increases the frictional force between the contact portion between the outer peripheral surface on the inner diameter side of the air inlet 43 and the inner peripheral surface on the inner diameter side of the air passage forming portion 190. Then, the vibration of the air inlet 43 in the cantilever state due to the vibration of the magnetic excitation force of the motor 30 is reduced, whereby the propagation from the motor holder 40 to the air conditioning case 10 is suppressed, and the noise radiated from the air conditioning case is reduced. Reduced.

(Eighth embodiment)
An air conditioner according to the eighth embodiment will be described with reference to FIG. In the air conditioner of the seventh embodiment, before the air passage forming portion 190 is press-fitted into the air introduction port 43, the inner peripheral surface on the inner diameter side of the air passage forming portion 190 is inclined. On the other hand, in the air conditioner of the present embodiment, although not shown, the inner peripheral surface on the outer diameter side of the air passage forming portion 190 is inclined before the air passage forming portion 190 is pressed into the air inlet 43. are doing.

Specifically, the inner peripheral surface on the outer diameter side of the air passage forming portion 190 has a cross-sectional shape including a center line 18 a of the air passage 18 in a direction away from the ventilation passage 11 in a direction of the center line 18 a of the air passage 18. , The air passage 18 is inclined away from the center line 18a.

Then, when the air passage forming portion 190 is press-fitted into the air inlet 43, the air inlet 43 is elastically deformed as shown in FIG. The cross-sectional shape of the cross-section including the center line 18a of 18 is inclined. Specifically, the air passage 18 is inclined away from the center line 18a of the air passage 18 as it advances away from the ventilation passage 11 in the direction of the center line 18a of the air passage 18.

Also, as the inner peripheral surface on the outer diameter side of the air passage forming portion 190 has a cross-sectional shape including a center line 18 a of the air passage 18, as the sectional shape advances in a direction away from the ventilation passage 11 in the direction of the center line 18 a of the air passage 18. The air passage 18 is inclined away from the center line 18a.

(4) Thereby, the frictional force between the outer peripheral surface of the outer diameter side of the air inlet 43 and the inner peripheral surface of the outer diameter side of the air passage forming portion 190 increases. Then, the vibration of the air inlet 43 in the cantilever state due to the vibration of the magnetic excitation force of the motor 30 is reduced, whereby the propagation from the motor holder 40 to the air conditioning case 10 is suppressed, and the noise radiated from the air conditioning case is reduced. Reduced.

(Ninth embodiment)
An air conditioner according to the ninth embodiment will be described with reference to FIG. Although not shown, the air conditioner of the present embodiment has an inner peripheral surface on the outer diameter side of the air passage forming portion 190 inclined before the air passage forming portion 190 is press-fitted into the air introduction port 43, Further, the inner peripheral surface on the inner diameter side of the air passage forming portion 190 is also inclined.

In the air conditioner of the present embodiment, although not shown, before the air passage forming portion 190 is press-fitted into the air inlet 43, the outer peripheral surface on the inner diameter side of the air inlet 43 is located at the center of the air passage 18. The cross-sectional shape of the cross section including the line 18 a is parallel to the center line 18 a of the air passage 18. Further, in a state before the air passage forming portion 190 is press-fitted into the air introduction port 43, the inner peripheral surface on the outer diameter side of the air introduction port 43 has a cross section including the center line 18a of the air passage 18 in the air. It is parallel to the center line 18 a of the passage 18.

Then, when the air passage forming portion 190 is press-fitted into the air inlet 43, the air inlet 43 is elastically deformed as shown in FIG. The outer peripheral surface on the outer diameter side of the air inlet 43 is formed such that the cross-sectional shape of the cross section including the center line 18 a of the air passage 18 advances in the direction away from the ventilation passage 11 in the direction of the center line 18 a of the air passage 18. 18 incline away from the center line 18a.

(4) Further, when the air passage forming portion 190 is press-fitted into the air inlet 43, the air inlet 43 is elastically deformed. The outer peripheral surface on the inner diameter side of the air inlet 43 is formed such that the cross-sectional shape of the cross section including the center line 18 a of the air passage 18 progresses in the direction away from the ventilation passage 11 in the direction of the center line 18 a of the air passage 18. From the center line 18a.

Thereby, the frictional force between the outer peripheral surface on the outer diameter side of the air inlet 43 and the inner peripheral surface on the outer diameter side of the air passage forming portion 190 is increased, and the outer peripheral surface on the inner diameter side of the air inlet 43 is increased. The frictional force at the contact portion on the inner peripheral surface on the inner diameter side of the air passage forming portion 190 increases. Then, the vibration of the air inlet 43 in the cantilever state due to the vibration of the magnetic excitation force of the motor 30 is reduced, whereby the propagation from the motor holder 40 to the air conditioning case 10 is suppressed, and the noise radiated from the air conditioning case is reduced. Reduced.

(Tenth embodiment)
An air conditioner according to the tenth embodiment will be described with reference to FIG. In the air conditioner according to the seventh embodiment, the tip of the air passage forming portion 190 does not contact the protruding portion 421a, and the tip of the air passage forming portion 190 contacts the outer peripheral surface 421b of the duct portion 42. Not. On the other hand, in the air conditioner of the present embodiment, the tip of the air passage forming portion 190 is in contact with the projection 421a, and the tip of the air passage forming portion 190 is in contact with the outer peripheral surface 421b of the duct portion 42. In contact.

(Eleventh embodiment)
An air conditioner according to the eleventh embodiment will be described with reference to FIG. In the air conditioner according to the eighth embodiment, the tip of the air passage forming portion 190 does not contact the protrusion 421a, and the tip of the air passage forming portion 190 contacts the outer peripheral surface 421b of the duct portion 42. Not. On the other hand, in the air conditioner of the present embodiment, the tip of the air passage forming portion 190 is in contact with the projection 421a, and the tip of the air passage forming portion 190 is in contact with the outer peripheral surface 421b of the duct portion 42. In contact.

(Twelfth embodiment)
An air conditioner according to the twelfth embodiment will be described with reference to FIG. In the air conditioner of the ninth embodiment, the tip of the air passage forming portion 190 does not contact the protrusion 421a, and the tip of the air passage forming portion 190 contacts the outer peripheral surface 421b of the duct portion 42. Not. On the other hand, in the air conditioner of the present embodiment, the tip of the air passage forming portion 190 is in contact with the projection 421a, and the tip of the air passage forming portion 190 is in contact with the outer peripheral surface 421b of the duct portion 42. In contact.

(Other embodiments)
(1) In each of the above embodiments, the protruding portion 421a that protrudes in the direction intersecting with the rotation center line 20a of the fan 20 is formed in the duct portion 42. On the other hand, instead of the protruding portion 421a, a protruding portion that protrudes in a direction intersecting with the rotation center line 20a of the fan 20 may be formed in the air inlet 43.

Note that the present disclosure is not limited to the above-described embodiment, and can be appropriately modified. In addition, the above embodiments are not irrelevant to each other, and can be appropriately combined unless a combination is obviously impossible. In each of the above embodiments, it is needless to say that elements constituting the embodiments are not necessarily essential, unless otherwise clearly indicated as being essential or in principle considered to be clearly essential. No. In each of the above embodiments, when a numerical value such as the number, numerical value, amount, range, or the like of the constituent elements of the exemplary embodiment is mentioned, it is particularly limited to a specific number when it is clearly stated that it is essential and in principle. The number is not limited to the specific number unless otherwise specified. Further, in each of the above embodiments, when referring to the material, shape, positional relationship, and the like of the constituent elements, unless otherwise specified, and in principle, it is limited to a specific material, shape, positional relationship, and the like. The material, shape, positional relationship, etc. are not limited.

(Summary)
According to a first aspect shown in a part or all of the above embodiments, the present air conditioner is an air conditioner that performs air conditioning in a vehicle compartment, and a ventilation path through which air blown into the vehicle compartment flows. And an air-conditioning case that forms Furthermore, a motor holder for fixing a motor for rotating a fan for generating a flow of air to the air conditioning case is provided. Further, the motor holder has a tubular portion that is disposed in a hole formed in the air conditioning case and that forms a housing space for housing the motor. Further, it has a cylindrical duct portion which communicates with the accommodation space and extends from the cylindrical portion in a direction intersecting the rotation center line of the fan. Furthermore, it has a cylindrical air inlet which extends from the duct toward the ventilation path and introduces a part of the air flowing through the ventilation path into the duct. In addition, the air conditioning case has a cylindrical air passage forming portion that extends from the ventilation passage toward the air introduction port and forms an air passage that guides a portion of the air flowing through the ventilation passage to the air introduction port. Further, the inner peripheral surface of the air passage forming portion and the outer peripheral surface of the air inlet are in contact with each other, and the air inlet is supported and fixed to the air passage forming portion. The outer peripheral surface of the air inlet and the inner peripheral surface of the air passage forming portion are formed such that the cross-sectional shape of the cross section including the center line of the air passage advances in the direction away from the ventilation passage in the direction of the center line of the air passage. It is inclined away from the center line.

According to the second aspect, at least one of the air inlet and the duct portion is formed with a protruding portion that protrudes in a direction intersecting with the rotation center line of the fan. It is in contact with the protrusion.

With this, the sealing property between the tip of the air passage forming part and the protruding part is improved, and the sealing property between the tip of the air passage forming part and the outer peripheral surface of the duct part is improved. Magnetic noise that propagates to the air conditioning case can be suppressed.

According to the third aspect, the tip of the air passage forming portion is in contact with the outer peripheral surface of the duct portion.

Thereby, the sealing performance between the tip of the air passage forming portion and the outer peripheral surface of the duct portion is improved, and furthermore, the magnetic sound transmitted from the motor holder to the air conditioning case can be suppressed.

According to the fourth aspect, the air passage forming portion is formed of an elastic member, and the air passage forming portion is elastically deformed and fitted to the air inlet.

As described above, since the air passage forming portion is elastically deformed and fitted to the air inlet, the frictional force of the contact portion between the outer peripheral surface of the air inlet and the inner peripheral surface of the air passage forming portion is further increased. be able to.

According to the fifth aspect, the air inlet is formed of an elastic member, and the air inlet is elastically deformed and fitted to the air passage forming portion.

As described above, since the air inlet is elastically deformed and fitted to the air passage forming portion, the frictional force of the contact portion between the outer peripheral surface of the air inlet and the inner peripheral surface of the air passage forming portion is further increased. be able to.

Claims

An air conditioner that performs air conditioning in the cabin,
An air-conditioning case (10) forming a ventilation path (11) through which air blown into the vehicle compartment flows;
A motor holder (40) for fixing a motor (30) for rotating a fan (20) for generating the air flow to the air conditioning case,
The motor holder,
A tubular portion (41) disposed in a hole (10a) formed in the air conditioning case and forming a housing space (410) for housing the motor;
A cylindrical duct portion (42) communicating with the housing space and extending from the cylindrical portion in a direction intersecting the rotation center line (20a) of the fan;
A cylindrical air inlet (43) extending from the duct toward the ventilation path and introducing a part of the air flowing through the ventilation path into the duct;
The air conditioning case has a cylindrical air passage forming an air passage extending from the ventilation path toward the air introduction port and forming a part of the air flowing through the ventilation path to the air introduction port. Part (190),
The inner peripheral surface of the air passage forming portion is in contact with the outer peripheral surface of the air inlet, and the air inlet is supported and fixed to the air passage forming portion,
The outer peripheral surface of the air introduction port and the inner peripheral surface of the air passage forming portion have a cross-sectional shape including a center line (18a) of the air passage in a direction away from the ventilation passage in a center line direction of the air passage. An air conditioner that is inclined away from the center line of the air passage as it goes to.
A protrusion (421a) is formed on at least one of the air inlet and the duct portion, the protrusion (421a) protruding in a direction intersecting with a rotation center line (20a) of the fan.
The air conditioner according to claim 1, wherein a tip of the air passage forming portion is in contact with the protruding portion.
The air conditioner according to claim 1 or 2, wherein a tip of the air passage forming portion is in contact with an outer peripheral surface (421b) of the duct portion.
The air passage forming portion is configured by an elastic member,
The air conditioner according to any one of claims 1 to 3, wherein the air passage forming portion is elastically deformed and fitted to the air inlet.
The air inlet is formed of an elastic member,
The air conditioner according to any one of claims 1 to 3, wherein the air inlet is elastically deformed and fitted to the air passage forming portion.