JPWO2018100862A1 - Vehicle air conditioner - Google Patents

Abstract

The vehicle air conditioner (1) includes a blower (12), an air conditioning case (11) and a speaker (30). The blower (12) blows air. The air conditioning case (11) has a ventilation path (15) through which the air blown by the blower (12) flows, and a plurality of blowout openings (21, 22, 23) communicating with the ventilation path (15). The speaker (30) is provided to emit an audible sound to the air passage (15) of the air conditioning case (11).

Description

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.

  The present disclosure relates to a vehicle air conditioner.

  BACKGROUND Conventionally, a vehicle air conditioner mounted on a vehicle and performing air conditioning of a vehicle interior is known. The vehicle air conditioner described in Patent Document 1 converts air conditioning sound generated from a blower into an electric signal, separates it into electric signals of a plurality of frequency bands according to an air conditioning mode, and An electrical signal whose phase is inverted is supplied to the speaker. As a result, since the sound of the opposite phase to the air conditioning sound generated from the fan is emitted from the speaker, it is possible to reduce the sound pressure of the air conditioning sound generated from the fan.

JP-A-1-186419

  However, although the vehicle air conditioner described in Patent Document 1 can reduce air conditioning noise having a relatively low frequency, a signal having a high processing speed is necessary to reduce air conditioning noise having a relatively high frequency. A processing circuit is required. Therefore, there is a concern that the manufacturing cost will be high. Further, if only the air conditioning noise having a relatively low frequency is reduced by the vehicle air conditioner and the air conditioning noise having a relatively high frequency is not reduced, the air conditioning noise may be a noise that is not comfortable to the passenger. is there.

  An object of the present disclosure is to provide a vehicular air-conditioning system capable of reducing the complexity of the air-conditioning noise.

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

  According to this, the audible sound (hereinafter referred to as "speaker sound") emitted by the speaker and the air conditioning sound are emitted from the air passage into the vehicle compartment via the same blowout opening. Therefore, it is possible to simultaneously deliver the sound in which the speaker sound is added to the air conditioning sound to the occupant from the same direction. Here, when the sound in which the speaker sound is added to the air conditioning sound is delivered to the passenger, the passenger superimposes the image obtained from the speaker sound and the air conditioning sound to generate the sound flowing in the image. As you can feel the air conditioning noise. Therefore, the vehicle air conditioner can reduce the annoyance that the occupant feels to the air conditioning noise. 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 can not obtain a sense of unity to the air conditioning sound and the speaker sound 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 blowout opening.

  Moreover, by installing a speaker in the ventilation path which is a generation | occurrence | production area | region of air conditioning sound, it is also possible to form the synthetic | combination sound which has harmony of the aim with the air conditioning sound and a speaker sound. Then, the air conditioning sound and the speaker sound that form the synthetic sound are emitted from the common blow-out opening, thereby preventing the occurrence of a phase shift between the speaker sound and the air-conditioning sound from the blow-out opening to the occupant. It is broken. Therefore, the vehicle air conditioner can be delivered to the occupant while maintaining the harmonization of the target of the synthetic sound of the speaker sound and the air conditioning sound.

  On the other hand, when a speaker is installed outside the air conditioner as in a conventional general vehicle, especially when a plurality of occupants get on the vehicle interior, the speaker sound reaches the plurality of occupants. The distance and the reach of the air conditioning noise will be different for each seat. Therefore, the phase shift between the speaker sound and the air conditioning sound changes for each seat, and a difference appears in the effect obtained for each occupant seated in each seat. Therefore, in a vehicle air conditioner according to one aspect of the present disclosure, a speaker is installed in the air passage of the air conditioner. As a result, this vehicle air conditioner can achieve the same effect on a plurality of occupants seated in each seat without causing a phase shift between the speaker sound and the air conditioning sound in any seat in the vehicle compartment. It is possible to

  Further, by providing the speaker in the air passage of the air conditioning case, the vehicle air conditioner can emit the speaker sound from any of the plurality of blowout openings. Assuming that speakers are provided to a plurality of ducts respectively connected to the plurality of blowout openings, the number of speakers increases according to the number of ducts. On the other hand, this vehicle air conditioner can reduce the number of speakers.

  The audible sound emitted by the speaker includes a sound that is not in reverse phase to the air conditioning sound, and is a sound that can be heard by the occupant at the same time as the air conditioning sound.

According to another aspect of the present disclosure, there is provided a vehicle air conditioner mounted on a vehicle, comprising:
A blower for blowing air,
An air-conditioning case having a ventilating path through which air blown by the blower flows, and a plurality of blowout openings communicating with the ventilating path;
A plurality of mode switching doors for adjusting the opening area of each of the plurality of blowout openings;
A plurality of ducts which are respectively connected to a plurality of blowout openings of the air conditioning case and which blow the conditioned air from the air passage into the vehicle compartment;
A plurality of duct speakers respectively provided to the plurality of ducts and emitting audible sounds to the plurality of ducts;
A detection unit that detects an air conditioning mode;
And a speaker control unit configured to control a duct speaker provided in a duct connected to a blowout opening opened by the mode switching door operated according to the air conditioning mode detected by the detection unit to emit an audible sound.

  According to this, the speaker sound and the air conditioning sound emitted by the duct speaker are emitted from the same air outlet into the vehicle compartment via the duct. Therefore, it is possible to simultaneously deliver the sound in which the speaker sound is added to the air conditioning sound to the occupant from the same direction. Therefore, the vehicle air conditioner can reduce the annoyance that the occupant feels to the air conditioning noise.

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 equipped with the vehicle air conditioner which concerns on 4th Embodiment. It is a schematic diagram of the vehicle interior of a conventional common 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 equipped.

  Hereinafter, embodiments of the present disclosure will be described based on the drawings. In the following embodiments, parts that are the same as 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, the vehicle air conditioner 1 of the present embodiment is mounted on a vehicle, and is disposed inside the instrument panel 2 at the foremost part of the vehicle interior. The vehicle air conditioner 1 sucks one or both of the inside air that is the air in the vehicle compartment and the outside air that is the air outside the vehicle cabin, adjusts the temperature and humidity of the sucked air, and blows it out into the vehicle compartment. Air conditioning. The vehicle air conditioner 1 includes an air conditioning unit 10, a speaker 30, 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, the general configuration of the vehicle air conditioner 1 will be described.

  FIG. 2 is a schematic view 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 control door 14, and the like.

  The air conditioning case 11 has a certain degree of elasticity and is formed of a resin excellent in strength. As resin which forms air-conditioning case 11, polypropylene is mentioned, for example. The air conditioning case 11 has an air passage 15 through which air flows. Further, the air conditioning case 11 introduces the outside air into the air passage 15 from the outside of the vehicle, the inside air introduction port 16 for introducing the inside air into the air passage 15 from a predetermined location in the vehicle room on the air flow direction upstream side of the air passage 15. It has an open air inlet 17 for the purpose. 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 air passage 15 from the inside air inlet 16 or the outside air inlet 17 via the 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 control door 14, a mode switching door 13, a speaker 30, etc. 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 servomotor (not shown). The inside / outside air switching door 18 rotates so as to close the other opening as the opening of one of the inside air introduction port 16 and the outside air introduction port 17 is opened. As a result, the inside / outside air switching door 18 can adjust the ratio between the air volume of the inside air introduced into the air passage 15 and the air volume of the outside air.

  The blower 12 is composed of a centrifugal fan 121, a motor 122 for rotationally driving the centrifugal fan 121, and the like. When the centrifugal fan 121 is rotationally driven together with the motor 122 of the blower 12, air is blown to the air passage 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 temperature and the humidity of the air blown by the blower 12 and flowing through the ventilation path 15 are adjusted by the evaporator 19 and the heater core 20, and any of the plurality of blowout openings 21, 22, 23 communicating 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 air passage 15. The evaporator 19 constitutes a known refrigeration cycle together with a compressor, a condenser, an expansion valve and the like which are not shown. The evaporator 19 is disposed downstream of the expansion valve and upstream of the compressor in the refrigeration cycle. The refrigerant which has been depressurized by the expansion valve and becomes a gas-liquid two-layer state flows in a tube (not shown) of the evaporator 19. The evaporator 19 cools the air flowing through the air passage 15 by heat exchange between the refrigerant flowing inside the tube and the air flowing through the air passage 15.

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

  A temperature control door 14 is provided between the evaporator 19 and the heater core 20. The temperature control door 14 adjusts the ratio of the air volume flowing around the heater core 20 after passing through the evaporator 19 and the air volume passing through the heater core 20 after passing through the evaporator 19.

  The air conditioning case 11 has, on the downstream side in the air flow direction of the air passage 15, a plurality of blowout openings 21, 22, 23 for blowing air from the air passage 15 into the vehicle compartment. The plurality of blowout openings are constituted by a face blowout opening 21, a foot blowout opening 22, and a defroster blowout opening 23. The face blowout opening 21 blows conditioned air toward the upper body or the periphery of the occupant seated in the front seat. The foot outlet 22 blows conditioned air toward the feet of the occupant. The defroster blowout opening 23 blows the conditioned air toward the windshield 3 (see FIG. 1) of the vehicle.

  A mode switching door 13 for adjusting the opening area of each of the face blowout opening 21, the foot blowout opening 22 and the defroster blowout opening 23 is provided. The mode switching door 13 is configured of 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 servomotor (not shown). The face door 131 opens and closes the face blowout opening 21. The foot door 132 opens and closes the foot outlet 22. The defroster door 133 opens and closes the defroster blowout opening 23.

  As shown in FIG. 3, a plurality of ducts 41, 42, 43 configured as separate members from the air conditioning case 11 are connected to the plurality of blowout openings 21, 22, 23 respectively. The plurality of ducts 41, 42, 43 blow the conditioned air into the vehicle compartment from the air passage 15 of the air conditioning case 11 via the plurality of blowout openings 21, 22, 23. The plurality of ducts are constituted by a face duct 41, a foot duct 42 and a defroster duct 43. The face duct 41 is connected to the face outlet 21. The foot duct 42 is connected to the foot outlet 22. The defroster duct 43 is connected to the defroster blowout opening 23.

  The air flowing out of the face blowout opening 21 passes through the face duct 41 and is blown out from the face blowout port 44 provided in the instrument panel 2 toward the upper body of the occupant seated in the seat or in the vicinity thereof. Air flowing out of the foot outlet 22 passes through the foot duct 42 and is blown out from the foot outlet 45 provided on the lower side of the instrument panel 2 toward the foot of the occupant or in the vicinity thereof. The air flowing out of the defroster outlet 23 passes through the defroster duct 43 and is blown out from the defroster outlet 46 provided on the top 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 control door 14 and the mode switching door 13 provided in the air conditioning unit 10 described above are controlled by the air conditioning electronic control unit 50 (hereinafter referred to as "air conditioning ECU"). The air conditioning ECU 50 drives and controls each component of the air conditioning unit 10 according to the air conditioning mode set by the inside air temperature, the outside air temperature, the amount of solar radiation, the operation of a switch provided on the air conditioner panel, or the like.

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

  In the present embodiment, the speaker 30 is provided in the air passage 15 of the air conditioning case 11. The speaker 30 emits an audible sound to the air passage 15. The audible sound (hereinafter referred to as “speaker sound”) emitted by the speaker 30 includes a sound that is not in reverse phase to the air conditioning sound, and is a sound that can be heard by the occupant at the same time as the air conditioning sound. The speaker 30 may be provided in the air passage 15, or may be provided on the inner wall or the outer wall of the air passage 15.

  The speaker 30 is provided in the ventilation path 15 at a portion closer to the blower 12 than the plurality of mode switching doors 13. Further, the speaker 30 is provided in a part of the air passage 15 between the temperature control door 14 and the plurality of mode switching doors 13. By providing the speaker 30 at such a position, the speaker sound is emitted into the vehicle compartment together with the conditioned air blown through at least one of the plurality of blowout openings 21, 22, 23. . That is, the speaker 30 is provided at a position where the speaker sound can be emitted into the vehicle compartment together with the conditioned air blown through at least one of the plurality of blowout openings 21, 22, 23. It can be said.

  The speaker control unit 51 is an electronic control unit that controls the volume of the sound emitted by the speaker 30 and the like. Information on the air flow rate of the blower 12 is transmitted to the speaker control unit 51 from the air conditioning ECU 50. The speaker control unit 51 performs control to increase the volume of the speaker 30 as the air flow rate of the blower 12 increases. On the other hand, the speaker control unit 51 performs control so as to reduce the volume of the speaker 30 as the air flow rate of the blower 12 decreases. Thereby, the speaker control unit 51 can appropriately adjust the volume of the speaker sound according to the air conditioning sound, and can deliver the sound in which the speaker sound is added to the air conditioning sound to the occupant.

  1 and 2 show a state in which the face door 131 opens the face blowout opening 21. In this state, the speaker sound emitted by the speaker 30 is emitted from the air passage 15 through the face outlet 21 through the face duct 41 and from the face outlet 44 into the vehicle compartment together with the conditioned air. In this case, the sound in which the speaker sound is added to the air conditioning sound is efficiently delivered to the occupant seated in the front seat in the vehicle compartment and the occupant seated in the rear seat, together with the conditioned wind. Therefore, when the face door 131 opens the face outlet 21, the speaker control unit 51 reduces the volume of the speaker 30 as compared to the case where the face door 131 closes the face outlet 21. It is possible. Therefore, the vehicle air conditioner 1 can reduce the amount of power consumed to drive the speaker 30.

  Here, the speaker sound of the present embodiment includes natural sound. The natural sound is, for example, at least one of a bird cries, an animal cries, an insect sound, a sound of swaying leaves, a sound of a river, a sound of waves, a sound of waterfalls, a sound of rain, and a sound of water. Is included. When such a natural sound is added to the air conditioning sound and delivered to the occupant, the occupant superimposes the image obtained from the natural sound and the air conditioning sound, and the natural sound flowing in the image is As you can feel the air conditioning noise. For example, when wild bird's call etc. is added to the air conditioning sound as natural sound, the occupant can feel the air conditioning sound like the sound of a waterfall in the wood by imaging the scene of the forest etc. Further, for example, when a gull scream or the like as a natural sound is added to the air conditioning sound, the occupant can feel the air conditioning sound like the sound of a beach wave by imagining a scene etc. of the sea. Therefore, the vehicle air conditioner 1 can reduce the annoyance felt by the occupant with respect to the air conditioning noise.

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

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

  According to this, the speaker sound and the air conditioning sound are discharged from the same air outlets 44, 45, 46 into the vehicle compartment via the air outlet openings 21, 22, 23 opened from the air passage 15 by the mode switching door. Ru. Therefore, it is possible to simultaneously deliver the sound in which the speaker sound is added to the air conditioning sound to the occupant from the same direction. Here, when the sound in which the speaker sound is added to the air conditioning sound is delivered to the passenger, the passenger superimposes the image obtained from the speaker sound and the air conditioning sound to generate the sound flowing in the image. As you can feel the air conditioning noise. Therefore, the vehicle air conditioner 1 can reduce the annoyance felt by the occupant with respect to the air conditioning noise.

  Further, the vehicle air conditioner 1 is provided with the speaker 30 in the air passage 15 of the air conditioning case 11 so that the air outlet 21, 22, 23 out of the plurality of air outlets 21, 22, 23 can be used. It is possible to emit a loudspeaker sound. Assuming that speakers are provided to the plurality of ducts 41, 42, 43 connected to the plurality of blowout openings 21, 22, 23, respectively, the number of speakers according to the number of the ducts 41, 42, 43 Will increase. On the other hand, the vehicle air conditioner 1 can reduce the number of speakers 30.

  By the way, in recent years, the demand for downsizing of the instrument panel 2 has been increased due to the demand for the improvement of the safety and the habitability. In that respect, 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 conventionally disposed in the instrument panel 2. Therefore, the vehicle air conditioner 1 can contribute to the downsizing of the instrument panel 2.

  (2) In the first embodiment, the speaker 30 transmits an audible sound together with conditioned air blown through at least one of the plurality of blowout openings 21, 22, 23 through the blowout openings 21, 22, 23. It is provided at a position where it can be released indoors.

  According to this, the speaker sound and the air conditioning sound are emitted into the vehicle cabin together with the air conditioning wind via the at least one blowout opening 21, 22, 23. Therefore, the vehicle air conditioner 1 can reduce the annoyance felt by the occupant with respect to the air conditioning sound by simultaneously delivering the sound in which the speaker sound is 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 conditioning system 1 is capable of blowing the air conditioning air blown through any of the blowout openings 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 emitted into the vehicle compartment.

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

  According to this, regardless of the degree of opening of the temperature control door 14, the vehicle air conditioner 1 receives the air conditioning noise as well as the air conditioning air blown from the air passage 15 via the blowout openings 21, 22, 23. The sound to which the sound is added can be emitted into the vehicle cabin.

  (5) In the first embodiment, the speaker control unit 51 performs control to increase the volume of the speaker 30 as the air flow rate of the blower 12 increases.

  Generally, the larger the air flow rate of the blower 12, the larger the air conditioning noise. The speaker control unit 51 can deliver the 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, since the occupant can superimpose the image obtained from the speaker sound and the air conditioning sound, the annoyance to the air conditioning sound is reduced.

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

  According to this, when the sound in which the natural sound is 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, and the air conditioning sound is close to the natural sound You can feel it. For example, adding bird's or animal's cry as natural sound to the air conditioning sound gives the occupants a feeling of being in the forest, so they feel the air conditioning sound like a waterfall's sound or a river sorrow be able to. Therefore, the vehicle air conditioner 1 can reduce the annoyance felt by the occupant with respect to the air conditioning noise, and can further improve the sense of comfort.

  (7) In the first embodiment, the natural sound emitted by the speaker 30 is the sound of birds, the sound of animals, the sound of insects, the sound of leaves swaying in the wind, the sound of flowing rivers, the sound of waves, the sound of waterfalls, rain At least one of the sound and the sound of water.

  According to this, various sounds are exemplified as natural sounds that cause the occupant to image a natural scene such as a forest, a river or a sea.

Second Embodiment
The second embodiment will be described. The second embodiment is the same as the first embodiment except that the arrangement of the speakers 30 and the control method thereof are changed from the first embodiment, and the other parts are the same as the first embodiment. Only explain.

  As shown in FIG. 4, in the second embodiment, the speakers 31 are provided in each of the plurality of ducts 41, 42, 43. The speakers 31 emit audible sound to the ducts 41, 42, 43 in which the respective speakers 31 are provided. In the following description, the speakers 31 provided in the ducts 41, 42, 43 will be referred to as a duct speaker 31. The physique and performance of the duct speaker 31 may be the same as or different from 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, 43, or may be provided on the inner wall or the outer wall of the ducts 41, 42, 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 the predetermined mode switching door 13 among the plurality of mode switching doors 13 according to the air conditioning mode to open the predetermined blowout openings 21, 22, 23, and drives the other mode switching door 13. The other blowout openings 21, 22, 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, for example, the volume of the sound emitted by each duct speaker 31. The speaker control unit 51 outputs a speaker sound to the duct speaker 31 provided in the ducts 41, 42, 43 connected to the blowout openings 21, 22, 23 opened by the mode switching door 13 operated according to the air conditioning mode. Transmit the signal to emit.

  Thereby, the speaker sound and the air conditioning sound emitted by the duct speaker 31 are discharged into the vehicle compartment from the same air outlets 44, 45, 46 via the predetermined ducts 41, 42, 43 through which the air conditioning wind flows. Therefore, it is possible to simultaneously deliver the sound in which the speaker sound is added to the air conditioning sound to the occupant from the same direction. Therefore, also in the configuration of the second embodiment, the same 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 to each of the plurality of ducts 41, 42, 43. Furthermore, in the third embodiment, the speaker 30 is also provided in the air passage 15.

  The air conditioning ECU 50 detects an 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 a speaker sound to the duct speaker 31 provided in the ducts 41, 42, 43 connected to the blowout openings 21, 22, 23 opened by the mode switching door 13 operated according to the air conditioning mode. Transmit the signal to emit. Furthermore, the speaker control unit 51 also transmits a signal to the speaker 30 provided in the ventilation path 15 so as to emit a speaker sound.

  As a result, the sound in which the speaker sound is added to the air conditioning sound is discharged into the vehicle compartment from the same air outlet 44, 45, 46 via the predetermined ducts 41, 42, 43 through which the air conditioning air flows. Therefore, the third embodiment can also achieve the same effects as the first and second embodiments. Furthermore, in the third embodiment, even if it is difficult for the loudspeakers 30 provided in the ventilation path 15 to emit the speaker sound from the outlets 44, 45, 46 of the predetermined ducts 41, 42, 43 into the vehicle compartment, Loudspeaker sound can be emitted from the duct speakers 31 provided in the predetermined ducts 41, 42, 43 into the vehicle compartment.

Fourth Embodiment
A fourth embodiment will be described with reference to FIGS. 6 to 10 are schematic diagrams for describing the embodiment, and the waveforms, sound pressure, frequency, and the like described in the respective drawings do not at all limit the scope of the present disclosure.

  In the fourth embodiment, the speaker sound emitted from the speaker 30 provided in the air passage 15 of the air conditioning case 11 is a sound capable of forming a synthetic sound having a target harmony by being added to the air conditioning sound. . The speaker sound of the fourth embodiment may be a sound including the natural sound described in the first embodiment or the like, or may be a sound not including the natural sound.

  FIG. 6 schematically shows the speaker sound, the air conditioning sound, and the synthetic sound of the speaker sound and the air conditioning sound at a predetermined frequency in the vehicle air conditioner 1 of the fourth embodiment. In each of the drawings, the speaker sound has a symbol α, the air conditioning sound has a symbol β, and the synthetic sound of the speaker sound and the air conditioning sound has a symbol γ.

  In the fourth embodiment, the speaker control unit 51 controls the speaker sound emitted from the speaker 30 so that the synthetic sound of the speaker sound and the air conditioning sound has a target harmony. The combination of the air conditioning sound and the speaker sound results in a synthesized sound having a target harmony. In addition, with synthetic sound having harmonious aim, frequency, volume, sound quality, etc. by experiments so that the annoyance to the occupant's air conditioning sound is reduced or the occupant can feel comfortable. Is the adjusted sound.

  Also in the fourth embodiment, the speaker 30 is installed in the air passage 15 which is a generation area of the air conditioning sound. Therefore, the speaker control unit 51 can adjust the speaker sound such that the synthetic sound having the aimed harmony is formed at the predetermined blowout openings 21 to 23. In addition, the synthetic sound which has the harmony of the aim is not limited to being formed by the predetermined blowing openings 21-23, for example, may be formed aiming at a predetermined position in the ventilation path 15, or an instrument panel It may be formed aiming at the blowout ports 44 to 46 provided.

  As shown in FIG. 7, the synthetic sound of the speaker sound and the air conditioning sound is blown out into the vehicle compartment from the same air outlets 44 to 46. Therefore, even when a plurality of occupants 5a, 5b, 5c are in the vehicle compartment, a phase shift between the speaker sound and the air conditioning sound occurs between the blowout ports 44 to 46 and the occupants 5a, 5b, 5c. Is prevented. Therefore, the vehicle air conditioner 1 maintains the harmony of the aim of the synthetic sound formed by the speaker sound and the air conditioning sound with respect to the occupants 5a, 5b and 5c seated on any seat in the vehicle compartment. It can be delivered to 5a, 5b, 5c. That is, the same effect can be obtained for the plurality of occupants 5a, 5b, 5c seated in each seat in the vehicle compartment.

  On the other hand, FIG. 8 is a schematic view of a cabin 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 occupants 5a, 5b and 5c are on each seat in the vehicle compartment, the reach of the speaker sound and the reach of the air conditioning sound are different for each occupant position.

  FIGS. 9 to 11 show the speaker sound, the air conditioning sound, and the speaker sound at predetermined frequencies delivered to different occupant positions A, B and C in the vehicle compartment in the conventional vehicle as shown in FIG. It is a schematic representation of the synthetic sound of the air conditioning sound and the air conditioning sound. As shown in FIGS. 9 to 11, phase shift amounts a, b and c of the speaker sound and the air conditioning sound delivered to different occupant positions A, B and C in the vehicle compartment are different from each other. Therefore, the synthetic sound of the speaker sound and the air conditioning sound becomes different sounds at different occupant positions A, B and C in the vehicle interior.

  FIG. 12 shows an example of the frequency characteristics of synthesized sound at different occupant positions A, B and C in the vehicle compartment. In FIG. 12, the frequency characteristics of the synthesized sound at each of the occupant positions A, B, and C are different in a predetermined frequency range (for example, 100 Hz). That is, at each of the occupant positions A, B, and C, the sound deviates from the synthesized sound maintaining the harmony of the aim. As described above, when the speaker 300 is installed outside the air conditioner, it is possible to deliver the synthesized sound maintaining the harmony of the aim to each of the plurality of occupants 5a, 5b, 5c seated in each seat in the vehicle compartment. Can not.

  Therefore, in the vehicle air conditioner 1 of the fourth embodiment, the speaker 30 is installed in the ventilation passage 15 which is the generation area of the air conditioning sound, and the air conditioning sound and the speaker sound are from the common blowing opening and the common air outlet. It is configured to be released into the passenger compartment. As a result, no phase shift occurs between the speaker sound and the air conditioning sound at any occupant position in the vehicle compartment. Therefore, the vehicle air conditioner 1 delivers the plurality of occupants 5a and 5b seated in the respective seats in the vehicle interior by delivering the positions to the respective occupants in the vehicle interior while maintaining the harmonization of the aim of the speaker sound and the air conditioning sound. An equivalent effect can be obtained for 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 capable of converting an electric signal transmitted from the speaker control unit 51 via the wiring 52 or the like into a sound wave and emitting the sound wave to the ventilation path 15. For example, the speaker 30 may be an electromagnetic speaker including a vibration generation source 32 configured of a coil, a magnet, and the like, and a diaphragm 33 that transmits the vibration generated by the vibration generation source 32 to air. Further, although not shown, for example, the speaker 30 may be a piezoelectric speaker provided with a piezoelectric element or the like that vibrates according to an electric signal. As described above, various configurations can be adopted as long as the speaker 30 is configured to be able to convert an electric signal into a sound wave and release it to the air passage 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 embodiments described above, and can be modified as appropriate. Moreover, said each embodiment is not mutually irrelevant and can be combined suitably, unless the combination is clearly impossible. Further, in each of the above-described embodiments, it is needless to say that the elements constituting the embodiment are not necessarily essential except when clearly indicated as being essential and when it is considered to be obviously essential in principle. Yes. Further, in the above embodiments, when numerical values such as the number, numerical value, amount, range, etc. of constituent elements of the embodiment are mentioned, it is clearly indicated that they are particularly essential and clearly limited to a specific number in principle. It is not limited to the specific number except when it is done. Further, in the above embodiments, when referring to the shape, positional relationship, etc. of the component etc., unless otherwise specified or in principle when limited to a specific shape, positional relationship, etc., the shape, etc. It is not limited to the positional relationship and the like.

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

  In the second and third embodiments described above, one duct speaker 31 is provided in 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 for 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.

  Further, in the above-described second and third embodiments, the air conditioning ECU 50 and the speaker control unit 51 have been described as separate units. On the other hand, in another embodiment, the air conditioning ECU 50 and the speaker control unit 51 may be integrally configured.

(Summary)
According to a first aspect, which is shown in part or all of the above-described embodiments, the vehicle air conditioner includes a blower, an air conditioning case, and a speaker. The blower blows air. The air conditioning case has a ventilation path through which the air blown by the blower flows, and a plurality of blowout openings communicating with the ventilation path. The speaker is provided to emit an audible sound to the air passage of the air conditioning case.

  According to the second aspect, the speaker is provided at a position capable of emitting an audible sound into the vehicle interior together with the conditioned air blown through at least one of the plurality of blowout openings.

  According to this, the speaker sound and the air conditioning sound are emitted into the vehicle cabin together with the air conditioning air from the same air outlet through the at least one blowout opening. Therefore, the vehicle air conditioner can simultaneously reduce the annoyance felt by the occupant with respect to the air conditioning sound by simultaneously delivering the sound in which the speaker sound is added to the air conditioning sound to the occupant from the same direction.

  According to the third aspect, the air conditioning system for a vehicle further includes a plurality of mode switching doors that adjust the opening area of each of the plurality of blowout openings. The speaker is provided in the ventilation path on the fan side of the plurality of mode switching doors.

  According to this, the vehicle air conditioner, regardless of the air conditioning mode, with any of the air conditioning modes, together with the air conditioning air blown through any of the blowout openings opened by the mode switching door, A sound in which a speaker sound is added to the air conditioning sound can be emitted into the vehicle cabin.

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

  According to this, regardless of the opening degree of the temperature control door, the vehicle air conditioning system sends the air conditioning noise sent from the air passage through the blowout opening as well as the sound in which the speaker sound is added to the air conditioning sound. It can be released indoors.

  According to the fifth aspect, the electronic control apparatus further includes a speaker control unit configured to increase the volume of the speaker as the air flow rate of the air blower increases.

  In general, the larger the air flow of the blower, the larger the air conditioning noise. The speaker control unit can deliver the 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 size of the air conditioning sound. Therefore, since the occupant can superimpose the image obtained from the speaker sound and the air conditioning sound, the annoyance to the air conditioning sound is reduced.

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

  According to this, when the sound in which the natural sound is 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, and the air conditioning sound is close to the natural sound You can feel it. Therefore, the air conditioning system for a vehicle can reduce the annoyance that the occupant feels to the air conditioning noise, and can further improve the sense of comfort.

  According to the seventh aspect, the natural sound emitted by the speaker is the sound of birds, the sound of animals, the sound of insects, the sound of leaves swaying in the wind, the sound of flowing rivers, the sound of waves, the sound of waterfalls, the sound of rain and It contains at least one of the sounds of water.

  According to this, various sounds are exemplified as natural sounds that cause the occupant to image a natural scene such as a forest, a river or a sea.

  According to the 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 blowout openings. The plurality of ducts are respectively connected to the plurality of blowing openings of the air conditioning case, and blow the conditioned air from the air passage into the vehicle cabin. A plurality of duct speakers are respectively provided to the plurality of ducts and emit audible sounds to 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 blowout opening opened by the mode switching door operated according to the air conditioning mode detected by the detection unit to emit an audible sound.

  According to this, the speaker sound and the air conditioning sound emitted by the duct speaker are emitted from the same air outlet into the vehicle compartment via the duct. Therefore, it is possible to simultaneously deliver the sound in which the speaker sound is added to the air conditioning sound to the occupant from the same direction. Therefore, the vehicle air conditioner can reduce the annoyance that the occupant feels to the air conditioning noise.

  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 the air blown by the blower flows, and a plurality of blowout openings communicating with the ventilation path. The plurality of mode switching doors adjust the opening area of each of the plurality of blowout openings. The plurality of ducts are respectively connected to the plurality of blowing openings of the air conditioning case, and blow the conditioned air from the air passage into the vehicle cabin. A plurality of duct speakers are respectively provided to the plurality of ducts and emit audible sounds to the plurality of ducts. The detection unit detects an air conditioning mode corresponding to the operation of the plurality of mode switching doors. The speaker control unit controls the duct speaker provided in the duct through which the conditioned air flows to emit an audible sound according to the air conditioning mode detected by the detection unit.

  According to this, the speaker sound and the air conditioning sound emitted by the duct speaker are emitted from the same air outlet into the vehicle compartment via the duct. Therefore, it is possible to simultaneously deliver the sound in which the speaker sound is added to the air conditioning sound to the occupant from the same direction. Therefore, the vehicle air conditioner can reduce the annoyance that the occupant feels to the air conditioning noise.

  According to the tenth aspect, the audible sound emitted from the speaker and the air conditioning sound generated by the drive of the blower are configured to be emitted into the vehicle compartment from the common blowing opening. According to this, it is possible to simultaneously deliver the sound in which the speaker sound is added to the air conditioning sound from the same direction to the occupant.

Claims (10)

A vehicle air conditioner mounted on a vehicle, comprising:
A blower (12) for blowing air;
An air-conditioning case (11) having a ventilation path (15) through which air blown by the blower flows, and a plurality of blowout openings (21, 22, 23) communicating with the ventilation path;
And a speaker (30) provided to emit an audible sound to the air passage of the air conditioning case.   2. The speaker according to claim 1, wherein the speaker is provided at a position capable of emitting an audible sound into the vehicle interior together with the conditioned air blown via the at least one of the plurality of the blowing openings. Vehicle air conditioner. It further comprises a plurality of mode switching doors (13, 131, 132, 133) for adjusting the opening area of each of the plurality of blowout openings,
The vehicle air conditioner according to claim 1 or 2, wherein the speaker is provided in the ventilation path closer to the blower than the plurality of mode switching doors. An evaporator (19) for cooling the air flowing through the air flow path of the air conditioning case;
A heater core (20) for heating the air flowing through the air passage of the air conditioning case;
It further comprises a temperature control door (14) provided between the evaporator and the heater core to adjust the air volume bypassing the heater core after passing through the evaporator and the air volume passing 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 air passage between the temperature control door and the plurality of mode switching doors.   The air conditioner for vehicles according to any one of claims 1 to 4 further provided with a speaker control part (51) which controls so that volume of said speaker may be enlarged, so that air volume of said fan is large.   The vehicle air conditioner according to any one of claims 1 to 5, wherein the audible sound emitted by the speaker includes natural sound.   The natural sound emitted by the speaker is at least one of a bird cries, an animal cries, an insect sound, a leaf swaying sound, a river flowing sound, a wave sound, a waterfall sound, a rain sound and a water sound. The vehicle air conditioner according to claim 6, which includes one. A plurality of mode switching doors for adjusting the opening area of each of the plurality of blowout openings;
A plurality of ducts (41, 42, 43) which are respectively connected to the plurality of outlet openings of the air conditioning case and which blow conditioned air from the air passage into the vehicle compartment;
A plurality of duct speakers (31) respectively provided to the plurality of ducts and emitting audible sounds to the plurality of ducts;
A detection unit (50) 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 an audible sound 51. The vehicle air conditioner according to any one of claims 1 to 7, comprising: 51). A vehicle air conditioner mounted on a vehicle, comprising:
A blower (12) for blowing air;
An air-conditioning case (11) having a ventilation path (15) through which air blown by the blower flows, and a plurality of blowout openings (21, 22, 23) communicating with the ventilation path;
A plurality of mode switching doors (13, 131, 132, 133) for adjusting the opening area of each of the plurality of blowout openings;
A plurality of ducts (41, 42, 43) which are respectively connected to the plurality of outlet openings of the air conditioning case and which blow conditioned air from the air passage into the vehicle compartment;
A plurality of duct speakers (31) respectively provided to the plurality of ducts and emitting audible sounds to the plurality of ducts;
A detection unit (50) 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 an audible sound 51) A vehicle air conditioner comprising:   9. An audio system according to any one of claims 1 to 8, wherein an audible sound emitted from the speaker and an air conditioning sound generated by driving the blower are emitted into the vehicle compartment from the common air outlet. Vehicle air conditioner as described.

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