WO2018100862A1

WO2018100862A1 - Vehicular air conditioning device

Info

Publication number: WO2018100862A1
Application number: PCT/JP2017/035227
Authority: WO
Inventors: 加藤　慎也; 康裕関戸; 神谷　洋平; 小林　亮; 安恵米津
Original assignee: 株式会社デンソー
Priority date: 2016-11-29
Filing date: 2017-09-28
Publication date: 2018-06-07
Also published as: JP6645589B2; JPWO2018100862A1

Abstract

A vehicular air conditioning device (1) is provided with an air blower (12), an air conditioning case (11), and a speaker (30). The air blower (12) sends air. The air conditioning case (11) includes a ventilation passage (15) through which the air sent from the air blower (12) flows, and includes a plurality of outflow openings (21, 22, 23) connected to the ventilation passage (15). The speaker (30) is provided so as to emit audible sound to the ventilation passage (15) included in the air conditioning case (11).

Description

Air conditioner for vehicles

Cross-reference to related applications

This application is based on Japanese Patent Application No. 2016-231622 filed on November 29, 2016, the contents of which are incorporated herein by reference.

This disclosure relates to a vehicle air conditioner.

Conventionally, a vehicle air conditioner that is mounted on a vehicle and performs air conditioning in the passenger compartment is known. The vehicle air conditioner described in Patent Document 1 converts the air-conditioning sound generated from the blower into an electric signal, separates it into electric signals of a plurality of frequency bands corresponding to the air-conditioning mode, and then converts those electric signals. An electric signal having an inverted phase is supplied to the speaker. Thereby, since the sound in the opposite phase to the air-conditioning sound generated from the blower is emitted from the speaker, the sound pressure of the air-conditioning sound generated from the blower can be reduced.

JP-A-1-186419

However, the vehicle air conditioner described in Patent Document 1 can reduce the air-conditioning sound having a relatively low frequency. A processing circuit is required. Therefore, there is a concern that the manufacturing cost will increase. In addition, if the vehicle air conditioner reduces only the air conditioning sound having a relatively low frequency and does not reduce the air conditioning sound having a relatively high frequency, the air conditioning sound may become a noise that is uncomfortable for the passenger. is there.

This disclosure aims to provide a vehicle air conditioner that can reduce the annoyance of air conditioning noise.

According to one aspect of the present disclosure, a vehicle air conditioner mounted on a vehicle,
A blower for blowing air;
A ventilation path through which air blown by the blower flows, and an air conditioning case having a plurality of outlet openings communicating with the ventilation path;
And a speaker provided to emit an audible sound in the ventilation path of the air conditioning case.

According to this, the audible sound (hereinafter referred to as “speaker sound”) and the air-conditioning sound emitted from the speaker are released from the ventilation path into the vehicle interior via the same outlet opening. Therefore, it is possible to simultaneously deliver a sound in which the speaker sound is added to the air-conditioning sound to the passenger from the same direction. Here, when the sound with speaker sound added to the air-conditioning sound is delivered to the occupant, the occupant superimposes the image obtained from the speaker sound and the air-conditioning sound, so that the sound flowing in the image is reproduced. So you can feel the air conditioning sound. Therefore, this vehicle air conditioner can reduce the annoyance that passengers feel with respect to the air-conditioning sound. On the other hand, when a speaker is installed outside the air conditioner as in a conventional general vehicle, the air conditioning sound and the speaker sound are delivered to the occupant from different places. In that case, the occupant cannot obtain a sense of unity with respect to the air-conditioning sound and speaker sound that can be heard separately from different directions, and the air-conditioning sound like the sound flowing in the image obtained from the speaker sound. It is difficult to feel. Therefore, in the vehicle air conditioner according to one aspect of the present disclosure, the speaker sound and the air conditioning sound can be delivered to the occupant from the common outlet opening.

Also, by installing a speaker in the ventilation path, which is the region where air-conditioning sound is generated, it is possible to form a synthesized sound that has the desired harmony with the air-conditioning sound and speaker sound. Then, the air-conditioning sound and speaker sound that form the synthesized sound are emitted from the common blow-off opening, thereby preventing a phase shift between the speaker sound and the air-conditioning sound from the blow-off opening to the passenger. Can be removed. Therefore, this vehicle air conditioner can be delivered to the occupant while maintaining the harmony of the aim of the synthesized sound of the speaker sound and the air conditioning sound.

On the other hand, when a speaker is installed outside the air conditioner like a conventional general vehicle, especially when a plurality of passengers are in the passenger compartment, the speaker sound reaches the plurality of passengers. The distance and the reach distance of the air conditioning sound are different for each seat. For this reason, the phase shift between the speaker sound and the air-conditioning sound changes for each seat, resulting in a difference in the effect obtained for each occupant seated in each seat. Therefore, in the vehicle air conditioner according to one aspect of the present disclosure, a speaker is installed in the ventilation path of the air conditioner. As a result, this vehicle air conditioner has the same effect for a plurality of passengers seated in each seat without causing a phase shift between the speaker sound and the air conditioning sound in any seat in the passenger compartment. It is assumed that it is configured.

Moreover, this vehicle air conditioner can emit speaker sound from any of the plurality of outlet openings by providing a speaker in the ventilation path of the air conditioning case. Temporarily, when it is set as the structure which provides a speaker in the several duct each connected to the several blowing opening part, the number of speakers will increase according to the number of ducts. On the other hand, this vehicle air conditioner can reduce the number of speakers.

Note that the audible sound emitted by the speaker includes sound that is not in reverse phase with respect to the air-conditioning sound, and is a sound that can be heard simultaneously by the occupant.

According to another aspect of the present disclosure, a vehicle air conditioner mounted on a vehicle,
A blower for blowing air;
A ventilation path through which air blown by the blower flows, and an air conditioning case having a plurality of outlet openings communicating with the ventilation path;
A plurality of mode switching doors for adjusting the opening area of each of the plurality of outlet openings;
A plurality of ducts that are respectively connected to a plurality of outlet openings of the air conditioning case, and blown conditioned air from the ventilation path into the vehicle interior;
A plurality of duct speakers that are respectively provided in a plurality of ducts and emit audible sounds to the plurality of ducts;
A detection unit for detecting the air conditioning mode;
A speaker control unit that controls the duct speaker provided in the duct connected to the blowout opening opened by the mode switching door that operates according to the air-conditioning mode detected by the detection unit to emit audible sound.

According to this, the speaker sound and the air-conditioning sound emitted by the duct speaker are emitted from the same outlet through the duct into the vehicle interior. Therefore, it is possible to simultaneously deliver a sound in which the speaker sound is added to the air-conditioning sound to the passenger from the same direction. Therefore, this vehicle air conditioner can reduce the annoyance that passengers feel with respect to the air-conditioning sound.

It is a schematic diagram which shows the cross-sectional structure of the vehicle air conditioner which concerns on 1st Embodiment. It is a schematic diagram which shows the cross-sectional structure of the air conditioning unit which concerns on 1st Embodiment. It is a schematic diagram of the vehicle air conditioner which concerns on 1st Embodiment. It is a schematic diagram of the vehicle air conditioner which concerns on 2nd Embodiment. It is a schematic diagram of the vehicle air conditioner which concerns on 3rd Embodiment. It is a graph for demonstrating the effect of the vehicle air conditioner which concerns on 4th Embodiment. It is a schematic diagram of the vehicle interior which mounts the vehicle air conditioner which concerns on 4th Embodiment. It is a schematic diagram of the vehicle interior of the conventional general vehicle. It is a graph for demonstrating the effect by the conventional speaker. It is a graph for demonstrating the effect by the conventional speaker. It is a graph for demonstrating the effect by the conventional speaker. It is a graph for demonstrating the effect by the conventional speaker. It is sectional drawing which shows an example of the speaker with which the vehicle air conditioner which concerns on 5th Embodiment is provided.

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 to each other will be described with the same reference numerals.

(First embodiment)
A first embodiment will be described with reference to the drawings. As shown in FIG. 1, a vehicle air conditioner 1 according to this embodiment is mounted on a vehicle, and is disposed inside an instrument panel 2 at the foremost part of a vehicle interior. The vehicle air conditioner 1 sucks one or both of the inside air that is the air inside the vehicle interior and the outside air that is the air outside the vehicle interior, adjusts the temperature and humidity of the sucked air, and blows the air into the vehicle interior. The air conditioning is performed. The vehicle air conditioner 1 includes an air conditioning unit 10, a speaker 30, and a plurality of

ducts

41, 42, 43, and the like. In FIG. 1, a part of the configuration of the air conditioning unit 10 is omitted.

First, a general configuration of the vehicle air conditioner 1 will be described.

FIG. 2 is a schematic diagram of the air conditioning unit 10 provided in the vehicle air conditioner 1. The air conditioning unit 10 includes an air conditioning case 11, a blower 12, a mode switching door 13, a temperature adjustment door 14, and the like.

The air conditioning case 11 is formed of a resin having a certain degree of elasticity and excellent in strength. Examples of the resin forming the air conditioning case 11 include polypropylene. The air conditioning case 11 has an air passage 15 through which air flows. In addition, the air conditioning case 11 introduces outside air into the ventilation path 15 from outside the vehicle, and an inside air introduction port 16 for introducing inside air from a predetermined location in the vehicle interior to the ventilation path 15 upstream of the ventilation path 15 in the air flow direction. The outside air inlet 17 is provided. Note that a duct (not shown) configured as a separate member from the air conditioning case 11 may be connected to the inside air introduction port 16 or the outside air introduction port 17. In that case, air is introduced into the ventilation path 15 from the inside air introduction port 16 or the outside air introduction port 17 through these ducts.

Inside the air conditioning case 11, an inside / outside air switching door 18, a blower 12, an evaporator 19, a heater core 20, a temperature adjustment door 14, a mode switching door 13, a speaker 30, and the like are provided.

The inside / outside air switching door 18 continuously adjusts the opening area of the inside air introduction port 16 and the opening area of the outside air introduction port 17. The inside / outside air switching door 18 is driven by an actuator such as a servo motor (not shown). The inside / outside air switching door 18 rotates so as to close one of the inside air introduction port 16 and the outside air introduction port 17 as the other opening portion is opened. Thereby, the inside / outside air switching door 18 can adjust the ratio between the air volume of the inside air introduced into the ventilation path 15 and the air volume of the outside air.

The blower 12 includes a centrifugal fan 121 and a motor 122 that rotationally drives the centrifugal fan 121. When the centrifugal fan 121 is rotationally driven together with the motor 122 of the blower 12, air is blown into the ventilation path 15. Thereby, the inside air or the outside air is introduced from the inside air introduction port 16 or the outside air introduction port 17 into the ventilation path 15. The air that is blown by the blower 12 and flows through the ventilation path 15 is adjusted in temperature and humidity by the evaporator 19 and the heater core 20, and passes through one of the plurality of

blowout openings

21, 22, and 23 that communicate with the ventilation path 15. It is blown out into the passenger compartment.

The evaporator 19 is a heat exchanger for cooling the air flowing through the ventilation path 15. The evaporator 19 constitutes a well-known refrigeration cycle together with a compressor, a condenser, an expansion valve, and the like (not shown). In the refrigeration cycle, the evaporator 19 is disposed downstream of the expansion valve and upstream of the compressor. The refrigerant that has been decompressed by the expansion valve and is in a gas-liquid two-layer state flows through a tube (not shown) of the evaporator 19. The evaporator 19 cools the air flowing through the ventilation path 15 by heat exchange between the refrigerant flowing inside the tube and the air flowing through the ventilation path 15.

The heater core 20 is a heat exchanger for heating the air flowing through the ventilation path 15. Hot water flows inside a tube (not shown) of the heater core 20. The heater core 20 heats the air flowing through the ventilation path 15 by heat exchange between the hot water flowing inside the tube and the air flowing through the ventilation path 15.

A temperature adjustment door 14 is provided between the evaporator 19 and the heater core 20. The temperature adjustment door 14 adjusts the ratio between the amount of air that flows around the heater core 20 after passing through the evaporator 19 and the amount of air that passes through the heater core 20 after passing through the evaporator 19.

The air conditioning case 11 has a plurality of

outlet openings

21, 22, 23 for blowing air from the ventilation path 15 into the vehicle compartment on the downstream side of the ventilation path 15 in the air flow direction. The plurality of blowing openings are constituted by a face blowing opening 21, a foot blowing opening 22, and a defroster blowing opening 23. The face blowing opening 21 blows air conditioned air toward the upper body of the occupant seated in the front seat or around it. The foot blowing opening 22 blows out the conditioned air toward the feet of the passenger. The defroster blowing opening 23 blows conditioned air toward the windshield 3 (see FIG. 1) of the vehicle.

The face blowing opening 21, the foot blowing opening 22, and the defroster blowing opening 23 are provided with mode switching doors 13 for adjusting the respective opening areas. The mode switching door 13 includes a face door 131, a foot door 132, and a defroster door 133. The face door 131, the foot door 132, and the defroster door 133 are each driven by an actuator such as a servo motor (not shown). The face door 131 opens and closes the face blowing opening 21. The foot door 132 opens and closes the foot outlet opening 22. The defroster door 133 opens and closes the defroster outlet opening 23.

As shown in FIG. 3, a plurality of

ducts

41, 42, and 43 configured as separate members from the air conditioning case 11 are connected to the plurality of

outlet openings

21, 22, and 23, respectively. The plurality of

ducts

41, 42, and 43 blow conditioned air from the ventilation path 15 of the air conditioning case 11 to the vehicle interior via the plurality of

outlet openings

21, 22, and 23. The plurality of ducts includes a face duct 41, a foot duct 42 and a defroster duct 43. The face duct 41 is connected to the face blowing opening 21. The foot duct 42 is connected to the foot outlet opening 22. The defroster duct 43 is connected to the defroster outlet opening 23.

The air that has flowed out from the face blowout opening 21 passes through the face duct 41 and is blown out from the face blowout opening 44 provided in the instrument panel 2 toward or near the upper body of the occupant seated on the seat. The air that has flowed out of the foot blowout opening 22 passes through the foot duct 42 and is blown out from the foot blowout opening 45 provided on the lower side of the instrument panel 2 toward the feet of the passenger or the vicinity thereof. The air flowing out from the defroster blowout opening 23 passes through the defroster duct 43 and is blown out from the defroster blowout opening 46 provided on the upper surface of the instrument panel 2 toward the windshield 3 of the vehicle.

The air blower 12, the inside / outside air switching door 18, the temperature adjustment door 14, and the mode switching door 13 included in the air conditioning unit 10 described above are driven and controlled by an air conditioning electronic control device 50 (hereinafter referred to as "air conditioning ECU"). The air conditioning ECU 50 drives and controls each component included in the air conditioning unit 10 in accordance with an internal air temperature, an external air temperature, an amount of solar radiation, or an air conditioning mode set by operating a switch provided on the air conditioner panel.

Subsequently, a characteristic configuration and operational effects of the vehicle air conditioner 1 of the present embodiment will be described.

In this embodiment, the speaker 30 is provided in the ventilation path 15 of the air conditioning case 11. The speaker 30 emits an audible sound in the ventilation path 15. The audible sound emitted from the speaker 30 (hereinafter referred to as “speaker sound”) includes sound that is not in reverse phase with respect to the air-conditioning sound, and is a sound that can be heard simultaneously by the occupant. The speaker 30 may be provided in the ventilation path 15, or may be provided on the inner wall or the outer wall of the ventilation path 15.

The speaker 30 is provided in a portion of the ventilation path 15 closer to the blower 12 than the plurality of mode switching doors 13. The speaker 30 is provided in a portion of the ventilation path 15 between the temperature adjustment door 14 and the plurality of mode switching doors 13. By providing the speaker 30 at such a position, the speaker sound is released into the vehicle interior along with the conditioned air blown through at least one of the plurality of

outlet openings

21, 22, and 23. . That is, the speaker 30 is provided at a position where the speaker sound can be emitted into the vehicle interior together with the conditioned air blown through at least one of the plurality of

outlet openings

21, 22, and 23. It can be said.

The speaker control unit 51 is an electronic control device that controls the volume of sound emitted from the speaker 30. Information related to the air flow rate of the blower 12 is transmitted from the air conditioning ECU 50 to the speaker control unit 51. The speaker control unit 51 performs control so that the volume of the speaker 30 is increased as the amount of air blown from the blower 12 increases. On the other hand, the speaker control unit 51 performs control so that the volume of the speaker 30 is reduced as the amount of air blown from the blower 12 is reduced. Thereby, the speaker control part 51 can adjust the volume of a speaker sound appropriately according to an air-conditioning sound, and can deliver the sound with which the speaker sound was added to the air-conditioning sound to a passenger | crew.

1 and 2 show a state in which the face door 131 opens the face blowing opening 21. In this state, the speaker sound emitted from the speaker 30 passes through the face blowout opening 21 from the ventilation path 15, passes through the face duct 41, and is released into the vehicle interior along with the conditioned air from the face blowout opening 44. In this case, the sound in which the speaker sound is added to the air-conditioning sound is efficiently delivered together with the conditioned air to the passenger seated in the front seat and the passenger seated in the rear seat. Therefore, when the face door 131 opens the face blowing opening 21, the speaker control unit 51 reduces the volume of the speaker 30 compared to when the face door 131 closes the face blowing opening 21. It is possible. Therefore, this vehicle air conditioner 1 can reduce the amount of power consumed to drive the speaker 30.

Here, the speaker sound of this embodiment includes natural sound. The natural sound is, for example, at least one of bird calls, animal calls, insect sounds, leaves swaying in the wind, river flowing sounds, wave sounds, waterfall sounds, rain sounds and water sounds. Is included. When such a natural sound added to the conditioned sound is delivered to the occupant, the occupant superimposes the image obtained from the natural sound and the conditioned sound, and the sound of the natural world flowing in the image. So you can feel the air conditioning sound. For example, when a bird's cry or the like is added as a natural sound to the air-conditioning sound, the occupant can feel the air-conditioning sound like a sound of a waterfall in the forest by imagining a forest scene or the like. Further, for example, when a seagull cry or the like is added as a natural sound to the air-conditioning sound, the occupant can feel the air-conditioning sound such as the sound of a seaside wave by imagining a sea scene or the like. Therefore, the vehicle air conditioner 1 can reduce the annoyance felt by the occupant with respect to the air conditioning sound.

The vehicle air conditioner 1 of the first embodiment described above has the following operational effects.

(1) In the first embodiment, the speaker 30 emits an audible sound to the ventilation path 15 of the air conditioning case 11.

According to this, the speaker sound and the air conditioning sound are emitted from the

same outlet

44, 45, 46 into the vehicle interior via the

outlet openings

21, 22, 23 opened from the ventilation path 15 by the mode switching door. The Therefore, it is possible to simultaneously deliver a sound in which the speaker sound is added to the air-conditioning sound to the passenger from the same direction. Here, when the sound with speaker sound added to the air-conditioning sound is delivered to the occupant, the occupant superimposes the image obtained from the speaker sound and the air-conditioning sound, so that the sound flowing in the image is reproduced. So you can feel the air conditioning sound. Therefore, this vehicle air conditioner 1 can reduce the annoyance felt by the occupant with respect to the air conditioning sound.

In addition, the vehicle air conditioner 1 is provided with a speaker 30 in the ventilation path 15 of the air conditioning case 11, so that any one of the plurality of

outlet openings

21, 22, 23 can be used from any of the

outlet openings

21, 22, 23. Speaker sound can be emitted. Temporarily, when it is set as the structure which provides a speaker with respect to the

several duct

41,42,43 connected to the several

blowing opening parts

21,22,23, respectively, the number of speakers according to the number of

ducts

41,42,43. Will increase. On the other hand, this vehicle air conditioner 1 can reduce the number of speakers 30.

By the way, in recent years, the demand for miniaturization of the instrument panel 2 has increased due to the demand for improved safety and comfort. In that regard, by using the speaker 30 of the present embodiment as an audio speaker, it is possible to reduce the mounting space of the audio speaker that has been conventionally arranged on the instrument panel 2. Therefore, this vehicle air conditioner 1 can contribute to miniaturization of the instrument panel 2.

(2) In the first embodiment, the speaker 30 transmits an audible sound together with the conditioned air blown through at least one of the plurality of

outlet openings

21, 22, 23 through the

outlet openings

21, 22, 23. It is provided at a position where it can be discharged indoors.

According to this, the speaker sound and the air-conditioning sound are released into the vehicle interior along with the air-conditioned wind via the at least one

outlet opening

21, 22, 23. Therefore, this vehicle air conditioner 1 can reduce the annoyance felt by the occupant with respect to the air-conditioning sound by simultaneously delivering the sound with the speaker sound added to the air-conditioning sound to the occupant from the same direction. .

(3) In the first embodiment, the speaker 30 is provided in the ventilation path 15 closer to the blower 12 than the plurality of mode switching doors 13.

According to this, the vehicle air conditioner 1 is conditioned with the conditioned air blown through any of the

air outlets

21, 22, 23 opened by the mode switching door 13 in any air conditioning mode. The sound in which the speaker sound is added to the air-conditioning sound can be released into the vehicle interior.

(4) In the first embodiment, the speaker 30 is provided in the ventilation path 15 between the temperature adjustment door 14 and the plurality of mode switching doors 13.

According to this, the vehicle air conditioner 1 is connected to the sound of the air conditioning sound together with the conditioned air blown from the ventilation path 15 via the

blowout openings

21, 22, and 23 regardless of the opening degree of the temperature adjustment door 14. The sound with the added sound can be released into the passenger compartment.

(5) In the first embodiment, the speaker control unit 51 performs control so that the volume of the speaker 30 is increased as the amount of air blown by the blower 12 is increased.

In general, the greater the amount of air blown by the blower 12, the greater the air conditioning noise. The speaker control unit 51 can deliver a sound in which the speaker sound is added to the air-conditioning sound to the occupant by appropriately adjusting the volume of the speaker sound according to the magnitude of the air-conditioning sound. Therefore, the occupant can superimpose the image obtained from the speaker sound and the air-conditioning sound, so that troublesomeness with respect to the air-conditioning sound is reduced.

(6) In the first embodiment, the speaker 30 emits natural sound.

According to this, when a sound with natural sound added to the air-conditioning sound is delivered to the occupant, the occupant superimposes the image obtained from the natural sound and the air-conditioning sound to make the air-conditioning sound close to the sound of the natural world. Can feel as. For example, adding birds and animal calls to the air conditioning sound as natural sounds gives the passengers the feeling of being in the forest, so the air conditioning sound feels like a waterfall sound or a river murmur be able to. Therefore, the vehicle air conditioner 1 can reduce the annoyance felt by the occupant with respect to the air conditioning sound, and can further improve the comfort.

(7) In the first embodiment, the natural sound emitted from the speaker 30 is the sound of birds, animal sounds, insects, leaves swaying in the wind, river flowing sounds, wave sounds, waterfall sounds, rain It includes at least one of sound and water sound.

According to this, various sounds are exemplified as a natural sound that makes an occupant imagine a natural scene such as a forest, a river or the sea.

(Second Embodiment)
A second embodiment will be described. The second embodiment is different from the first embodiment in the arrangement of the speaker 30 and the control method thereof, and the other parts are the same as those in the first embodiment, and therefore different parts from the first embodiment. Only explained.

As shown in FIG. 4, in the second embodiment, a speaker 31 is provided in each of the plurality of

ducts

41, 42, 43. The speaker 31 emits an audible sound to the

ducts

41, 42, and 43 provided with the respective speakers 31. In the following description, the speaker 31 provided in the

ducts

41, 42, and 43 is referred to as a duct speaker 31. The physique and performance of the duct speaker 31 may be the same as or different from those of the speaker 30 described in the first embodiment.

At least one duct speaker 31 is provided for each of the plurality of face ducts 41, the plurality of foot ducts 42, and the defroster duct 43. The duct speaker 31 may be provided in the

ducts

41, 42, and 43, or may be provided on the inner wall or the outer wall of the

ducts

41, 42, and 43.

Here, the air conditioning ECU 50 described in the first embodiment functions as a detection unit that detects an air conditioning mode when the air conditioning unit 10 operates. The air conditioning ECU 50 drives a predetermined mode switching door 13 among the plurality of mode switching doors 13 according to the air conditioning mode, opens predetermined blowing

openings

21, 22, and 23, and drives the other mode switching doors 13. Then, the

other blowout openings

21, 22, and 23 are closed.

The air conditioning ECU 50 transmits the detected air conditioning mode to the speaker control unit 51. The speaker control unit 51 of the second embodiment can individually control the volume of sound emitted from each duct speaker 31. The speaker control unit 51 outputs speaker sound to the duct speaker 31 provided in the

ducts

41, 42, and 43 connected to the

outlet openings

21, 22, and 23 opened by the mode switching door 13 that operates according to the air conditioning mode. The signal is transmitted so as to emit.

Thereby, the speaker sound and the air-conditioning sound emitted from the duct speaker 31 are released into the vehicle interior from the

same outlet

44, 45, 46 through the

predetermined ducts

41, 42, 43 through which the conditioned air flows. Therefore, it is possible to simultaneously deliver a sound in which the speaker sound is added to the air-conditioning sound to the passenger from the same direction. Therefore, also in the configuration of the second embodiment, the same operational effects as those of the first embodiment can be obtained.

(Third embodiment)
A third embodiment will be described. The third embodiment is a combination of the first embodiment and the second embodiment.

As shown in FIG. 5, in the third embodiment, a duct speaker 31 is provided in each of the plurality of

ducts

41, 42, 43. Furthermore, in the third embodiment, a speaker 30 is also provided in the ventilation path 15.

The air conditioning ECU 50 detects the air conditioning mode when the air conditioning unit 10 operates. Then, the air conditioning ECU 50 transmits the detected air conditioning mode to the speaker control unit 51. The speaker control unit 51 outputs speaker sound to the duct speaker 31 provided in the

ducts

41, 42, and 43 connected to the

outlet openings

21, 22, and 23 opened by the mode switching door 13 that operates according to the air conditioning mode. The signal is transmitted so as to emit. Furthermore, the speaker control unit 51 transmits a signal to the speaker 30 provided in the ventilation path 15 so as to emit speaker sound.

Thus, the sound in which the speaker sound is added to the air-conditioning sound is emitted from the

same outlet

44, 45, 46 into the vehicle interior via the

predetermined ducts

41, 42, 43 through which the air-conditioned wind flows. Therefore, the third embodiment can achieve the same effects as the first and second embodiments. Furthermore, in the third embodiment, even when the speaker sound emitted from the speaker 30 provided in the ventilation path 15 is difficult to be released into the vehicle interior from the

air outlets

44, 45, 46 of the predetermined

ducts

41, 42, 43, Speaker sound can be emitted from the duct speaker 31 provided in the

predetermined ducts

41, 42, 43 into the vehicle interior.

(Fourth embodiment)
A fourth embodiment will be described with reference to FIGS. 6 to 10 are schematic diagrams for explaining the embodiments, and the waveform, sound pressure, frequency, and the like described in each drawing do not limit the scope of rights of the present disclosure.

In 4th Embodiment, the speaker sound emitted from the speaker 30 provided in the ventilation path 15 of the air-conditioning case 11 is a sound which can form the synthetic sound which has a target harmony by adding to an air-conditioning sound. . In addition, the speaker sound of 4th Embodiment may be a sound containing the natural sound demonstrated by 1st Embodiment etc., or may be a sound which does not contain a natural sound.

FIG. 6 schematically shows speaker sound, air-conditioning sound, and synthesized sound of speaker sound and air-conditioning sound at a predetermined frequency in the vehicle air conditioner 1 of the fourth embodiment. In each drawing, the symbol α is attached to the speaker sound, the symbol β is attached to the air conditioning sound, and the symbol γ is attached to the synthesized sound of the speaker sound and the air conditioning sound.

In the fourth embodiment, the speaker control unit 51 controls the speaker sound emitted from the speaker 30 so that the synthesized sound of the speaker sound and the air-conditioning sound has a target harmony. By synthesizing the air-conditioning sound and the speaker sound, a synthesized sound having a target harmony is obtained. Note that the synthesized sound having the desired harmony is the frequency, volume, or sound quality by experiment etc. so that the annoyance felt by the passenger's air conditioning sound is reduced or the passenger feels comfortable Is the adjusted sound.

Also in the fourth embodiment, the speaker 30 is installed in the ventilation path 15 which is an area where air-conditioning noise is generated. Therefore, the speaker control unit 51 can adjust the speaker sound so that a synthesized sound having a target harmony is formed at the predetermined outlets 21 to 23. Note that the synthesized sound having the harmony of the aim is not limited to being formed by the predetermined blowout openings 21 to 23, and may be formed, for example, aiming at a predetermined position in the ventilation path 15, or the instrument panel 2 may be formed aiming at the outlets 44 to 46 provided.

As shown in FIG. 7, the synthesized sound of the speaker sound and the air-conditioning sound is blown out from the same outlets 44 to 46 into the vehicle interior. Therefore, even when a plurality of

occupants

5a, 5b, and 5c are in the passenger compartment, there is a phase shift between the speaker sound and the air-conditioning sound between the outlets 44 to 46 and the

occupants

5a, 5b, and 5c. It is prevented. Therefore, the vehicle air conditioner 1 maintains the harmony of the aim of the synthesized sound formed by the speaker sound and the air conditioning sound with respect to the

occupants

5a, 5b, and 5c seated in any seat in the passenger compartment. 5a, 5b, 5c. That is, an equivalent effect can be obtained for a plurality of

occupants

5a, 5b, and 5c seated in each seat in the vehicle interior.

On the other hand, FIG. 8 is a schematic view of the interior of a conventional general vehicle. In this vehicle, a speaker 300 is installed at the door of the vehicle. In this case, particularly when a plurality of

passengers

5a, 5b, and 5c are in each seat in the passenger compartment, the reach distance of the speaker sound and the reach distance of the air-conditioning sound differ for each passenger position.

9 to 11 show speaker sounds, air-conditioning sounds, and speaker sounds at predetermined frequencies delivered to different occupant positions A, B, and C in the vehicle interior in the conventional vehicle as shown in FIG. This figure schematically shows the synthesized sound of the air conditioning sound. As shown in FIGS. 9 to 11, the phase shift amounts a, b, and c between the speaker sound and the air-conditioning sound delivered to different occupant positions A, B, and C in the passenger compartment are different from each other. Therefore, the synthesized sound of the speaker sound and the air-conditioning sound is different at different passenger positions A, B, and C in the passenger compartment.

FIG. 12 shows an example of the frequency characteristics of the synthesized sound at different passenger positions A, B, and C in the passenger compartment. In FIG. 12, the frequency characteristics of the synthesized sound at the occupant positions A, B, and C are different in a predetermined frequency region (for example, 100 Hz). That is, at each of the occupant positions A, B, and C, the sound deviates from the synthesized sound that maintains the target harmony. As described above, when the speaker 300 is installed outside the air conditioner, the synthesized sound maintaining the targeted harmony can be delivered to each of the plurality of

occupants

5a, 5b, and 5c seated in each seat in the vehicle interior. Can not.

Therefore, in the vehicle air conditioner 1 of the fourth embodiment, the speaker 30 is installed in the ventilation path 15 that is the region where the air-conditioning sound is generated, and the air-conditioning sound and the speaker sound are transmitted from the common outlet opening and the common outlet. It is configured to be released into the passenger compartment. Thereby, in any passenger | crew position in a vehicle interior, the phase shift of a speaker sound and an air-conditioning sound does not arise. Therefore, the vehicle air conditioner 1 delivers a plurality of

occupants

5a, 5b seated in each seat in the vehicle interior by delivering to each occupant position in the vehicle interior while maintaining harmony between the aim of the speaker sound and the air conditioning sound. It is possible to obtain an equivalent effect with respect to 5c.

(Fifth embodiment)
5th Embodiment demonstrates an example of the speaker 30 with which the vehicle air conditioner 1 is provided. As shown in FIG. 13, the speaker 30 is provided outside the air conditioning case 11. The speaker 30 is configured to be able to convert an electric signal transmitted from the speaker control unit 51 via the wiring 52 or the like into a sound wave and emit it to the ventilation path 15. For example, the speaker 30 may be an electromagnetic speaker including a vibration generation source 32 including a coil and a magnet, and a vibration plate 33 that transmits vibration generated by the vibration generation source 32 to the air. Although not shown, for example, the speaker 30 may be a piezo-type speaker including a piezo element that vibrates in response to an electric signal. As described above, the speaker 30 can adopt various configurations as long as the configuration can convert the electric signal into a sound wave and emit it to the ventilation path 15. Moreover, the speaker 30 is not restricted to what is provided in the outer side of the air-conditioning case 11 as shown in FIG. For example, the speaker 30 may be provided inside the air conditioning case 11.

(Other embodiments)
The present disclosure is not limited to the above-described embodiment, and can be modified as appropriate. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like.

For example, in the first and third embodiments described above, one speaker 30 is provided in the ventilation path 15. On the other hand, in another embodiment, a plurality of speakers 30 may be provided in the ventilation path 15.

In the second and third embodiments described above, one duct speaker 31 is provided for each of the plurality of

ducts

41, 42, 43. On the other hand, in another embodiment, a plurality of duct speakers 31 may be provided in each of the plurality of

ducts

41, 42, 43. Further, among the plurality of

ducts

41, 42, 43, there may be

ducts

41, 42, 43 in which the duct speaker 31 is not provided.

In the second and third embodiments described above, the air conditioning ECU 50 and the speaker control unit 51 are described as separate units. On the other hand, in other embodiments, the air conditioning ECU 50 and the speaker control unit 51 may be configured integrally.

(Summary)
According to the 1st viewpoint shown by one part or all part of the above-mentioned embodiment, a vehicle air conditioner is provided with an air blower, an air conditioning case, and a speaker. The blower blows air. The air conditioning case has a ventilation path through which air blown by the blower flows, and a plurality of outlet openings that communicate with the ventilation path. The speaker is provided to emit an audible sound in the ventilation path of the air conditioning case.

According to the second aspect, the speaker is provided at a position where an audible sound can be emitted into the vehicle compartment together with the conditioned air blown through at least one of the plurality of outlet openings.

According to this, the speaker sound and the air-conditioning sound are discharged into the vehicle interior together with the conditioned air from the same outlet through at least one outlet opening. Therefore, this vehicle air conditioner can reduce the annoyance felt by the occupant with respect to the air-conditioning sound by simultaneously delivering the sound with the speaker sound added to the air-conditioning sound to the occupant from the same direction.

According to the third aspect, the vehicle air conditioner further includes a plurality of mode switching doors for adjusting the opening areas of the plurality of outlet openings. The speaker is provided in the ventilation path closer to the blower than the plurality of mode switching doors.

According to this, the vehicle air conditioner, regardless of the air conditioning mode, in any air conditioning mode, along with the conditioned air blown through any blowout opening opened by the mode switching door, A sound in which the speaker sound is added to the air-conditioning sound can be released into the vehicle interior.

According to a fourth aspect, the vehicle air conditioner further includes an evaporator, a heater core, and a temperature adjustment door. The evaporator cools the air flowing through the ventilation path of the air conditioning case. The heater core heats the air flowing through the ventilation path of the air conditioning case. The temperature adjustment door is provided between the evaporator and the heater core, and adjusts the air volume that bypasses the heater core after passing through the evaporator and the air volume that passes through the heater core after passing through the evaporator. The speaker is provided in the ventilation path between the temperature adjustment door and the plurality of mode switching doors.

According to this, the vehicle air conditioner generates a sound in which the speaker sound is added to the air-conditioning sound together with the air-conditioning air blown from the ventilation path via the blowout opening regardless of the opening degree of the temperature adjustment door. Can be released indoors.

According to the fifth aspect, a speaker control unit is further provided for controlling the loudspeaker volume to increase as the blower volume of the blower increases.

In general, the greater the air volume of the blower, the greater the air conditioning noise. The speaker control unit can deliver a sound in which the speaker sound is added to the air-conditioning sound to the occupant by appropriately adjusting the volume of the speaker sound according to the magnitude of the air-conditioning sound. Therefore, the occupant can superimpose the image obtained from the speaker sound and the air-conditioning sound, so that troublesomeness with respect to the air-conditioning sound is reduced.

According to the sixth aspect, the audible sound emitted from the speaker includes natural sound.

According to this, when a sound with natural sound added to the air-conditioning sound is delivered to the occupant, the occupant superimposes the image obtained from the natural sound and the air-conditioning sound to make the air-conditioning sound close to the sound of the natural world. Can feel as. Therefore, the vehicle air conditioner can reduce the annoyance felt by the occupant with respect to the air conditioning sound, and can further improve the comfort.

According to the seventh aspect, the natural sounds emitted by the speakers are: bird calls, animal calls, insect sounds, leaves swaying in the wind, river flowing sounds, wave sounds, waterfall sounds, rain sounds and It contains at least one of the sounds of water.

According to an eighth aspect, the vehicle air conditioner includes a plurality of mode switching doors, a plurality of ducts, a plurality of duct speakers, a detection unit, and a speaker control unit. The plurality of mode switching doors adjust the opening area of each of the plurality of outlet openings. The plurality of ducts are respectively connected to a plurality of outlet openings provided in the air conditioning case, and blow conditioned air from the ventilation path into the vehicle interior. The plurality of duct speakers are provided in the plurality of ducts, respectively, and emit audible sound in the plurality of ducts. The detection unit detects the air conditioning mode. The speaker control unit controls the duct speaker provided in the duct connected to the blowing opening opened by the mode switching door that operates according to the air-conditioning mode detected by the detection unit to emit an audible sound.

According to a ninth aspect, a vehicle air conditioner mounted on a vehicle includes a blower, an air conditioning case, a plurality of mode switching doors, a plurality of ducts, a plurality of duct speakers, a detection unit, and a speaker control unit. The blower blows air. The air conditioning case has a ventilation path through which air blown by the blower flows, and a plurality of outlet openings that communicate with the ventilation path. The plurality of mode switching doors adjust the opening area of each of the plurality of outlet openings. The plurality of ducts are respectively connected to a plurality of outlet openings provided in the air conditioning case, and blow conditioned air from the ventilation path into the vehicle interior. The plurality of duct speakers are provided in the plurality of ducts, respectively, and emit audible sound in the plurality of ducts. A detection part detects the air-conditioning mode according to operation | movement of several mode switching doors. The speaker control unit controls the duct speaker provided in the duct through which the conditioned air flows according to the air conditioning mode detected by the detection unit so as to emit an audible sound.

According to the tenth aspect, the audible sound emitted from the speaker and the air-conditioning sound generated by driving the blower are emitted from the common blowout opening into the vehicle interior. According to this, it is possible to simultaneously deliver the sound in which the speaker sound is added to the air-conditioning sound to the passenger from the same direction.

Claims

A vehicle air conditioner mounted on a vehicle,
A blower (12) for blowing air;
A ventilation path (15) through which air blown by the blower flows, and an air conditioning case (11) having a plurality of outlet openings (21, 22, 23) communicating with the ventilation path;
A vehicle air conditioner comprising: a speaker (30) provided to emit an audible sound in the ventilation path of the air conditioning case.
The said speaker is provided in the position which can discharge | emit an audible sound into a vehicle interior with the conditioned air ventilated via at least one said blowing opening part among several said blowing opening parts. Vehicle air conditioner.
A plurality of mode switching doors (13, 131, 132, 133) for adjusting an opening area of each of the plurality of outlet openings;
The said speaker is a vehicle air conditioner of Claim 1 or 2 provided in the said ventilation path of the said air blower side rather than the said some mode switching door.
An evaporator (19) for cooling the air flowing through the ventilation path of the air conditioning case;
A heater core (20) for heating air flowing through the ventilation path of the air conditioning case;
A temperature adjusting door (14) provided between the evaporator and the heater core, for adjusting an air volume that bypasses the heater core after passing through the evaporator and an air volume that passes through the heater core after passing through the evaporator; ,
The vehicle air conditioner according to any one of claims 1 to 3, wherein the speaker is provided in the ventilation path between the temperature adjustment door and the plurality of mode switching doors.
The vehicle air conditioner according to any one of claims 1 to 4, further comprising a speaker control unit (51) configured to control the volume of the speaker to be increased as the amount of air blown from the blower is increased.
6. The vehicle air conditioner according to any one of claims 1 to 5, wherein the audible sound emitted from the speaker includes a natural sound.
The natural sound emitted by the speaker is at least one of bird calls, animal calls, insect sounds, leaves swaying in the wind, river flowing sounds, wave sounds, waterfall sounds, rain sounds and water sounds. The vehicle air conditioner according to claim 6, comprising one.
A plurality of mode switching doors for adjusting an opening area of each of the plurality of blowing openings;
A plurality of ducts (41, 42, 43) that are respectively connected to the plurality of outlet openings of the air-conditioning case and blow conditioned air from the ventilation path into the vehicle interior;
A plurality of duct speakers (31) that are respectively provided in the plurality of ducts and emit audible sounds to the plurality of ducts;
A detection unit (50) for detecting an air conditioning mode;
A speaker control unit for controlling the duct speaker provided in the duct connected to the blowout opening opened by the mode switching door that operates according to the air conditioning mode detected by the detection unit to emit an audible sound. 51), The vehicle air conditioner according to any one of claims 1 to 7.
A vehicle air conditioner mounted on a vehicle,
A blower (12) for blowing air;
A ventilation path (15) through which air blown by the blower flows, and an air conditioning case (11) having a plurality of outlet openings (21, 22, 23) communicating with the ventilation path;
A plurality of mode switching doors (13, 131, 132, 133) for adjusting an opening area of each of the plurality of blowing openings;
A plurality of ducts (41, 42, 43) that are respectively connected to the plurality of outlet openings of the air-conditioning case and blow conditioned air from the ventilation path into the vehicle interior;
A plurality of duct speakers (31) that are respectively provided in the plurality of ducts and emit audible sounds to the plurality of ducts;
A detection unit (50) for detecting an air conditioning mode;
A speaker control unit for controlling the duct speaker provided in the duct connected to the blowout opening opened by the mode switching door that operates according to the air conditioning mode detected by the detection unit to emit an audible sound. 51).
The audible sound emitted from the speaker and the air-conditioning sound generated by driving the blower are configured to be released into the vehicle interior from the common blowout opening. The vehicle air conditioner described.