WO2020040437A1

WO2020040437A1 - Vehicle air conditioner

Info

Publication number: WO2020040437A1
Application number: PCT/KR2019/009317
Authority: WO
Inventors: 김정선; 김태완; 서정훈; 홍선주; 이종곤; 이태건
Original assignee: 한온시스템 주식회사
Priority date: 2018-08-21
Filing date: 2019-07-26
Publication date: 2020-02-27
Also published as: KR20200021813A

Abstract

The present invention relates to a vehicle air conditioner, and the objective of the present invention is to improve a microphone mounting structure of a noise reduction device such that a microphone can acquire the air-conditioning noise of an air-conditioning case without direct contact with the air of an inner path of the air-conditioning case, thereby preventing contamination of and damage to the microphone, caused by direct contact between the air of the inner path of the air-conditioning case and the microphone, and the generation of unnecessary blowing noise. In order to accomplish the objective, the present invention relates to the vehicle air conditioner including the noise reduction device capable of reducing the air-conditioning noise, wherein the noise reduction device comprises: the microphone capable of acquiring the air-conditioning noise of the inner path of the air-conditioning case; and a speaker outputting a noise-damping sound wave to the inner path of the air-conditioning case on the basis of the air-conditioning noise acquired by the microphone, so as to reduce the air-conditioning noise, and has a microphone mounting part for mounting the microphone at one side surface portion of the air-conditioning case so as to enable acquisition of the internal air-conditioning noise of the air-conditioning case on the outside of the air-conditioning case.

Description

Car air conditioner

The present invention relates to a vehicle air conditioner, and more particularly, by improving the microphone mounting structure of the noise reduction device, the microphone can obtain air conditioning noise of the air conditioning case without direct contact with the air in the internal flow path of the air conditioning case. And, through this, it relates to a vehicle air conditioning apparatus that can prevent the contamination and damage of the microphone due to the direct contact of the microphone and the internal air side of the air conditioning case, and the occurrence of unnecessary blowing noise.

Noise is the biggest cause of the deterioration of the vehicle's riding comfort. There are various kinds of vehicle noises, and among them, there are noises of air conditioners.

Noise of the air conditioner (hereinafter, referred to as “air conditioning noise”) includes vibration and noise generated from an air conditioner compressor, vibration and noise generated from a high-pressure refrigerant pipe, and vibration and noise generated from a blower of the air conditioning case.

This air conditioning noise significantly lowers the ride comfort of the vehicle when it is transmitted into the vehicle interior. In particular, the air conditioning noise introduced into the interior of the vehicle not only lowers the ride comfort of the vehicle but also gives the driver fatigue and impedes a lot of safety driving.

Therefore, the air conditioning noise must be reduced to improve the riding comfort and the driver's safe driving.

As a method of reducing air conditioning noise, there is an ANC (Active Noise Control) device that outputs sound waves in reverse phase opposite to the air conditioning noise and cancels the air conditioning noise.

As shown in FIG. 1, the microphone 3 and the speaker 5 are installed in the internal flow path 1a of the air conditioning case 1, and the air conditioning noise is obtained through the microphone 3. In addition, the noise reduction sound wave in the reverse phase opposite to the obtained air conditioning noise is output to the speaker 5. Therefore, the air conditioning noise is canceled to reduce the air conditioning noise.

Usually, the microphone 3 is provided on the internal flow path 1a of the air conditioning case 1. In particular, the microphone 3, which is fixedly installed on the inner wall surface of the inner channel 1a, obtains the inner side air conditioning noise of the air conditioning case 1.

However, the conventional ANC device has a structure in which the microphone 3 for acquiring air conditioning noise is installed in the internal flow path 1a of the air conditioning case 1, and thus the air blown along the internal flow path 1a and the microphone. There is a disadvantage that (3) is in direct contact, due to this disadvantage there is a problem that the microphone (3) interferes with the flow of blowing air, rather causing blowing noise.

In addition, the microphone 3, which is in direct contact with the blowing air of the internal flow path 1a, is directly exposed to moisture, foreign matter, and the like contained in the blowing air, and due to the exposure of the foreign matter, the microphone 3 malfunctions, is damaged, and is contaminated. There is a disadvantage in that, due to this disadvantage there is a problem that the performance of the microphone 3 is reduced and the life is shortened.

In particular, since the performance of the microphone 3 is degraded, a drawback is that the air conditioning noise reduction performance of the ANC device is significantly reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to improve the mounting structure of the microphone, so that the microphone makes the air-conditioning noise of the air-conditioning case side without direct contact with the air on the internal flow path of the air-conditioning case. It is to provide a vehicle air conditioner that can be obtained.

Another object of the present invention is to configure the microphone so as to obtain air conditioning noise on the air conditioning case side without direct contact with the air in the internal channel side of the air conditioning case, and thus is unnecessary due to the direct contact of the microphone with the air in the internal channel side of the air conditioning case. An object of the present invention is to provide a vehicle air conditioner capable of preventing "blowing noise".

Still another object of the present invention is to configure the microphone so as to obtain air conditioning noise on the air conditioning case side without directly contacting the air flow side air of the air conditioning case, whereby the microphone has various foreign matters in the air in the internal flow path of the air conditioning case. It is to provide a vehicle air conditioner that is not exposed to.

Still another object of the present invention is to configure the microphone so that it is not exposed to various foreign matters in the air of the internal flow path of the air conditioning case, thereby preventing vehicle malfunction, damage, and contamination caused by various foreign matters in the air of the internal flow path. To provide a device.

In order to achieve the above object, the vehicle air conditioner according to the present invention includes a noise reduction device that can reduce the air conditioning noise, the noise reduction device is a microphone that can obtain the air conditioning side internal noise of the air conditioning case; And a speaker configured to reduce air conditioning noise by outputting noise attenuation sound waves to an internal flow path of the air conditioning case based on the air conditioning noise obtained from the microphone, wherein the inside of the air conditioning case is located outside the air conditioning case. In order to obtain air conditioning noise, it characterized in that it comprises a microphone mounting portion for mounting the microphone on one side portion of the air conditioning case.

Preferably, the microphone mounting portion, the air conditioning noise acquisition hole penetrating toward the inner channel from the outer surface of the air conditioning case; In order to obtain the internal air conditioning noise of the air conditioning case through the air conditioning noise acquisition hole, the microphone is installed on the outer portion of the air conditioning case corresponding to the air conditioning noise acquisition hole and the microphone except for the air conditioning noise acquisition hole It characterized in that it comprises a microphone cover (Mic Cover) for sealing the peripheral portion.

The microphone cover includes: a cover part surrounding a circumference of the microphone while supporting the microphone; And an assembly unit for assembling the end of the cover unit to the air conditioning noise acquisition hole of the air conditioning case so that the microphone faces the air conditioning noise acquisition hole.

And the cover portion comprises: a rear wall portion for supporting the microphone; It is characterized in that it comprises a sound collector extending around the air conditioning noise acquisition hole of the air conditioning case while surrounding the upper, lower, left, right side portions of the microphone from the rear wall.

According to the vehicle air conditioner according to the present invention, by improving the microphone mounting structure of the ANC device, it is possible to efficiently obtain the internal air conditioning noise of the air conditioning case from the outside of the air conditioning case.

In addition, since the structure of acquiring the internal air conditioning noise of the air conditioning case on the outside of the air conditioning case, there is an effect that the microphone can obtain the air conditioning noise on the air conditioning case side without directly contacting the air flow side of the air conditioning case.

In addition, since the microphone can acquire the air conditioning noise of the air conditioning case without directly contacting the air in the air flow case of the air conditioning case, unnecessary “blowing noise” is generated by the direct contact of the microphone with the air in the air flow case of the air conditioning case. There is an effect that can be prevented.

In addition, since the microphone can obtain air conditioning noise on the air conditioning case side without directly contacting the air in the air passage case, there is an effect that the microphone is not exposed to various foreign matters in the air in the air passage case. .

In addition, since the microphone is not exposed to various foreign matters in the air in the internal flow path of the air conditioning case, there is an effect that can reduce the risk of failure and damage and contamination of the microphone due to various foreign matters in the air in the internal flow path.

1 is a view showing an ANC device installed in a conventional vehicle air conditioner,

Figure 2 is a perspective view showing in detail the microphone mounting structure of the ANC device which is the main feature of the vehicle air conditioner according to the present invention;

3 is a plan view showing a microphone mounting structure of the ANC device which is a main feature of the vehicle air conditioner according to the present invention;

4 is a perspective view showing another embodiment of the microphone mounting structure of the ANC device which is the main feature of the vehicle air conditioner according to the present invention;

5 is a plan view showing an ANC device microphone mounting structure according to another embodiment;

Figure 6 is a perspective view showing another embodiment of the microphone mounting structure of the ANC device which is the main feature of the vehicle air conditioner according to the present invention,

Fig. 7 is a plan view showing an ANC device microphone mounting structure according to still another embodiment.

Best Mode for Carrying Out the Invention Preferred embodiments of a vehicle air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

First, before looking at the features of the vehicle air conditioner according to the present invention, with reference to Figures 2 and 3 will briefly look at the ANC device that is a noise reduction device.

The ANC device includes a microphone 3 and a speaker 5. The microphone 3 is provided in the noise source of air conditioning noise, for example, the blower 1b (refer FIG. 1) side and the heat exchanger 1c downstream of the internal flow path 1a of the air conditioning case 1, The microphone 3 thus installed acquires air conditioning noise generated from the noise source.

The speaker 5 is installed toward the internal flow path 1a from the outer surface of the air conditioning case 1, and the speaker 5 thus installed is an anti-phase noise reduction wave opposite to the air conditioning noise obtained by the microphone 3. Is output to the internal flow path (1a) of the air conditioning case (1).

Next, the features of the vehicle air conditioner according to the present invention will be described in detail with reference to FIGS. 2 and 3.

First, the air conditioning apparatus of the present invention includes a microphone mounting portion 10 for attaching the microphone 3 of the ANC device to the outer surface portion of the air conditioning case 1.

The microphone mounting unit 10 includes an air conditioning noise acquisition hole 20 formed at one side of the air conditioning case 1.

The air conditioning noise acquisition hole 20 penetrates from the outer surface of the air conditioning case 1 toward the internal flow path 1a, and the air conditioning noise acquisition hole 20 thus penetrated is air-conditioned at the outer portion of the air conditioning case 1. The internal air conditioning noise of the case 1 can be obtained.

In addition, the microphone mounting unit 10 includes a microphone 3 installed at an outer portion of the air conditioning case 1 corresponding to the air conditioning noise acquisition hole 20, and the microphone 3 except for the air conditioning noise acquisition hole 20. It is provided with a microphone cover (Mic Cover) 30 to seal the peripheral portion.

The microphone cover 30 includes a cover portion 40 surrounding the circumference of the microphone 3 in a state in which the microphone 3 is supported, and an air conditioning noise acquisition hole of the air conditioning case 1. And an assembly part 50 to be assembled to 20).

The cover part 40 has an internal space 40a, and the rear wall part 42 for supporting the microphone 3 and the upper and lower parts of the microphone 3 are supported by the rear wall part 42. , Left and right side is composed of a sound collector 44 extending to surround.

In particular, the sound collector 44 is extended to surround the upper, lower, left, right side portions of the microphone 3, but extends toward the air conditioning noise acquisition hole 20 of the air conditioning case 1, The extended sound collecting unit 44 is configured to collect the internal air conditioning noise of the air conditioning case 1 leaked out through the air conditioning noise acquisition hole 20. Therefore, the microphone 3 supported by the rear wall portion 42 can efficiently obtain the internal air conditioning noise of the air conditioning case 1.

Here, the internal space 40a of the sound collector 44 is configured to have a cross-sectional area that gradually narrows from the air conditioning noise acquisition hole 20 of the air conditioning case 1 to the microphone 3 of the rear wall portion 42. desirable.

This is to increase the sound collecting efficiency of the internal air conditioning noise of the air conditioning case 1 leaked into the air conditioning noise acquisition hole 20 of the air conditioning case 1. In particular, it is to increase the sound collection efficiency of the air conditioning noise toward the microphone 3 of the rear wall portion 42, as a result, the microphone 3 can efficiently obtain the internal air conditioning noise of the air conditioning case (1). .

And it is preferable that the said collection part 44 is comprised by a polyhedron structure. In particular, it is preferable that it consists of tetrahedrons. In some cases, the sound collecting portion 44 may be formed in a hemispherical shape, as shown in FIGS. 4 and 5.

2 and 3, the assembling unit 50 includes an assembling groove 52 formed along an outer circumference of the edge of the end of the sound collecting unit 44.

The assembling groove 52 is configured to be fitted into the air conditioning case 1 portion around the air conditioning noise acquisition hole 20, and the assembling groove 52 thus coupled to the air conditioner case 1 covers the cover 40. ) Is assembled to the air conditioning noise acquisition hole (20).

Since the assembling unit 50 has a structure in which the cover unit 40 is assembled to the air conditioning noise acquisition hole 20 of the air conditioning case 1, the microphone 3 installed in the cover unit 40 has an air conditioning noise acquisition hole. The outer portion of the 20 can be fixedly spaced apart. As a result, the microphone 3 can stably acquire the internal air conditioning noise of the air conditioning case 1 at the outer portion of the air conditioning case 1.

2 and 3, the microphone mounting unit 10 prevents the microphone cover 30 from being rotated with respect to the air conditioning noise acquisition hole 20, thereby preventing the microphone 3 of the microphone cover 30 from being rotated. It is further provided with an in-situ fixing part 60 which fixes in-situ.

The position fixing part 60 is assembled with a square microphone cover 30 formed to correspond to the air conditioning noise acquisition hole 20 of the air conditioning case 1 formed in a square shape, and the air conditioning noise acquisition hole 20 of a square shape. A portion 50 is included.

The square air conditioning noise acquisition hole 20 and the assembling unit 50 of the microphone cover 30 restrict the rotation between each other, thereby essentially rotating the microphone cover 30 with respect to the air conditioning noise acquisition hole 20. prevent.

Therefore, the microphone 3 installed in the microphone cover 30 can always maintain a constant posture. As a result, the microphone 3 can effectively acquire the air conditioning noise of the air conditioning noise acquisition hole 20 side in the correct position without changing the posture.

Preferably, the air conditioning noise acquisition hole 20 and the assembling unit 50 of the microphone cover 30 is configured in a square, but may be configured in a square.

2 and 3, the microphone mounting unit 10 further includes a microphone protection member 70 installed at an air conditioning noise acquisition hole 20 side portion of the air conditioning case 1.

The microphone protection member 70 is made of a material, for example, a nonwoven fabric, which passes air conditioning noise and blocks various foreign substances such as moisture and dust.

The microphone protection member 70 passes the air conditioning noise flowing out from the inside of the air conditioning case 1 to the microphone 3 side of the microphone cover 30 through the air conditioning noise acquisition hole 20, and blocks various foreign substances. .

Accordingly, exposure of the microphone 3 to foreign matter on the inner side of the air conditioning case 1 is prevented at the source without degrading the air conditioning noise acquisition performance of the microphone 3.

As a result, contamination, damage and failure of the microphone 3 due to foreign matter inside the air conditioning case 1 can be prevented. As a result, the performance and lifespan of the microphone 3 can be improved.

According to the microphone mounting portion 10 having such a configuration, the air conditioning noise acquisition hole 20 is formed in the air conditioning case 1, the microphone 3 is installed outside the air conditioning noise acquisition hole 20, and then air conditioning noise Since the air conditioning noise leaked into the acquisition hole 20 is obtained by the microphone 3, the internal air conditioning noise of the air conditioning case 1 may be obtained from the outside of the air conditioning case 1.

In addition, since the internal air-conditioning noise of the air conditioning case 1 is obtained outside the air conditioning case 1, the air conditioner case 1 does not have to be directly contacted with the air of the internal flow path side of the air conditioning case 1. The air conditioning noise of the side can be obtained.

In addition, since the microphone 3 can obtain the air conditioning noise on the air conditioning case 1 side without directly contacting the air in the internal flow channel side of the air conditioning case, the air and the microphone on the internal flow path 1a side of the air conditioning case 1 are obtained. Unnecessary “blowing noise” caused by direct contact of (3) can be prevented.

In addition, since the microphone 3 can obtain air conditioning noise on the air-conditioning case 1 side without directly contacting the air in the internal flow path 1a of the air-conditioning case 1, the microphone 3 is the air-conditioning case ( It is not exposed to various foreign substances in the air in the internal flow path 1a of 1).

In addition, since the microphone 3 is not exposed to various foreign matters in the air of the internal flow path 1a of the air conditioning case 1, failure and damage of the microphone 3 due to various foreign matters in the air of the internal flow path 1a and It can reduce the risk of contamination.

On the other hand, the microphone cover 30 of the microphone mounting portion 10 is preferably made of a rubber (Rubber) material.

This is because there is little fear of damage and damage to external contact and impact, and it is easy to handle and easy to assemble to the air conditioning noise acquisition hole 20 of the air conditioning case 1.

In addition, when the assembling unit 50 of the microphone cover 30 is assembled into the air conditioning noise acquisition hole 20 of the air conditioning case 1 by being made of a rubber material, the microphone cover for the air conditioning noise acquisition hole 20 This is because the adhesion ratio of 30 is good, and thus, sealing performance between the air conditioning noise acquisition hole 20 and the microphone cover 30 may be secured.

Next, Figures 6 and 7 are views showing another embodiment of the vehicle air conditioner according to the present invention.

In another embodiment, the air conditioner includes a microphone mounting unit 10, and the air conditioner noise acquisition hole 20 of the air conditioning case 1 constituting the microphone mounting unit 10 is formed in a circle, and a microphone cover (assembled thereto) 30) The side portion is also characterized by being configured in a circular shape.

In addition, the air conditioner of another embodiment is provided with an assembly unit 50 for assembling the microphone cover 30 in the air conditioning noise acquisition hole 20 of the air conditioning case 1, the assembly unit 50, the microphone A fastening flange 80 formed along the edge of the end of the cover 30, and a fastening screw for fastening the fastening flange 80 to the air conditioning case (1) around the air conditioning noise acquisition hole 20 ( 82).

Since the assembly 50 has a structure in which the edge of the end of the microphone cover 30 is fastened to the air conditioning case 1 around the air conditioning noise acquisition hole 20, the microphone cover 30 is air-conditioned case 1. ) Is fixed to the air conditioning noise acquisition hole (20).

On the other hand, since the fastening screw 82 directly fastens the microphone cover 30 to the air conditioning case 1 around the air conditioning noise acquisition hole 20, the microphone cover 30 of the air conditioning noise acquisition hole 20 is formed. Rotation is prevented at the source.

Thereby, the microphone 3 of the microphone cover 30 can always maintain a constant home position without changing posture.

Therefore, as in the above example, the position fixing part 60 of the rectangular structure for preventing the rotation of the microphone cover 30 and fixing the position of the microphone 3 in the fixed position is unnecessary.

That is, the fastening screws 82 of the assembling unit 50 serve as the fixed position fixing part 60 which prevents the rotation of the microphone cover 30 at the same time.

6 and 7, the microphone mounting unit 10 of another embodiment includes the microphone cover 30, but the microphone cover 30 may be made of a hard material.

In this case, the sealing performance between the microphone cover 30 and the air conditioning case 1 portion of the air conditioning noise acquisition hole 20 tends to be degraded.

Accordingly, the microphone mounting unit 10 of another embodiment may include a separate sealer 90 that may hermetically seal a portion between the microphone cover 30 and the air conditioning case 1 at the air conditioning noise acquisition hole 20. Equipped with.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

Claims

And a noise reduction device capable of reducing air conditioning noise, wherein the noise reduction device includes a microphone (3) capable of acquiring air conditioning noise on the inner channel (1a) side of the air conditioning case (1), and the microphone (3). In the vehicle air conditioner comprising a speaker (5) to reduce the air conditioning noise by outputting noise attenuation sound waves to the internal passage (1a) of the air conditioning case (1) based on the obtained air conditioning noise,

In order to obtain the internal air conditioning noise of the air conditioning case (1) from the outside of the air conditioning case (1), the microphone mounting portion 10 for mounting the microphone 3 to one side portion of the air conditioning case (1) Vehicle air conditioning apparatus comprising a.
The method of claim 1,

The microphone mounting portion 10,

An air conditioning noise acquisition hole (20) penetrating from the outer surface of the air conditioning case (1) toward the inner flow passage (1a);

The microphone 3 is provided at an outer portion of the air conditioning case 1 corresponding to the air conditioning noise acquisition hole 20 so as to obtain internal air conditioning noise of the air conditioning case 1 through the air conditioning noise acquisition hole 20. ) And a microphone cover (30) for sealing a peripheral portion of the microphone (3) except for the air conditioning noise acquisition hole (20).
The method of claim 2,

The microphone cover 30,

A cover part 40 surrounding the circumference of the microphone 3 in a state in which the microphone 3 is supported;

Assembling unit 50 for assembling the end portion of the cover portion 40 to the air conditioning noise acquisition hole 20 of the air conditioning case 1 so that the microphone 3 faces the air conditioning noise acquisition hole 20. Vehicle air conditioning apparatus comprising a).
The method of claim 3, wherein

The cover portion 40,

A rear wall portion 42 for supporting the microphone 3;

The sound collector 44 extending from the rear wall portion 42 toward the air conditioning noise acquisition hole 20 of the air conditioning case 1 is wrapped around the upper, lower, left and right side portions of the microphone 3. Vehicle air conditioning apparatus comprising a.
The method of claim 4, wherein

The assembly unit 50,

And an assembly groove 52 formed along an outer circumference of the end edge of the collector 44;

The assembly groove 52 is coupled to the air conditioning case 1 portion around the air conditioning noise acquisition hole 20, and acquires air conditioning noise of the air conditioning case 1 around the edge of the end of the sound collecting unit 44. Vehicle air conditioning apparatus, characterized in that assembled in the hole (20).
The method of claim 5,

It is installed in the air conditioning noise acquisition hole 20 side portion of the air conditioning case 1 so that the air conditioning noise movement from the inside of the air conditioning case 1 to the microphone 3 side can pass and block the movement of foreign matter. Vehicle air conditioning apparatus further comprises a microphone protection member (70).
The method of claim 6,

Further preventing the rotation of the microphone cover 30 with respect to the air conditioning noise acquisition hole 20, and further provided with a fixed position fixing part 60 for always fixing the microphone 3 of the microphone cover 30 in place. Vehicle air conditioner, characterized in that.
The method of claim 7, wherein

The exact position fixing part 60,

The air conditioner noise acquisition hole 20 formed in a square shape, and a microphone cover 30 assembly part 50 formed in correspondence with a rectangular air conditioner noise acquisition hole 20;

The coupling structure of the air conditioner noise acquisition hole 20 and the microphone cover 30 assembly unit 50 of a rectangular shape is characterized in that the rotation of the microphone cover 30 with respect to the air conditioner noise acquisition hole 20 is limited. Vehicle air conditioning system.
The method of claim 8,

The air conditioning noise acquisition hole (20) of the air conditioning case (1) and the assembling unit (50) of the microphone cover (30), the vehicle air conditioning apparatus, characterized in that configured in a rectangular coupling structure.
The method of claim 7, wherein

The exact position fixing part 60,

The assembly part 50 of the microphone cover 30 is fastened to a part of the air conditioning case 1 around the air conditioning noise acquisition hole 20, and the microphone cover 30 for the air conditioning noise acquisition hole 20. At least one fastening screw 82 for limiting the rotation of the vehicle air conditioner, characterized in that.
The method of claim 4, wherein

The internal space 40a of the sound collector 44 is

Vehicle air conditioning apparatus characterized in that it has a cross-sectional area gradually narrowed toward the microphone (3) of the rear wall portion 42 from the air conditioning noise acquisition hole (20) of the air conditioning case (1).
The method of claim 11,

The sound collecting unit 44, a vehicle air conditioning apparatus, characterized in that configured in a polyhedral structure.
The method of claim 12,

The sound collecting unit 44, a vehicle air conditioning apparatus, characterized in that configured in a tetrahedral structure.
The method of claim 11,

The sound collecting unit 44 is a vehicle air conditioning apparatus, characterized in that configured in a hemispherical structure.
The method according to any one of claims 2 to 14,

The microphone cover 30, the vehicle air conditioner, characterized in that composed of a rubber (Rubber) material.
The method according to any one of claims 2 to 14,

And a sealer (90) capable of hermetically sealing a portion between the microphone cover (30) and the air conditioning noise acquisition hole (20) side air conditioning case (1).