JP2008149998A - Vehicular air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air-conditioner capable of enhancing the air-conditioning efficiency thereof and the comfortableness of an occupant seated in a rear seat by a simple constitution. <P>SOLUTION: The vehicular air-conditioner comprises a face duct 40 which is provided in an instrument panel 10 arranged in a forward part in a cabin to constitute an air supply passage with air-conditioned air supplied in the cabin passing through, and branched into a vent outlet side duct 42 and an upper vent outlet side duct 41 toward the downstream side of the flow of the air-conditioned air, vent outlets 11, 12 formed at the instrument panel 10 to supply the air-conditioned air passing through the vent outlet side duct 42 toward a front seat in the cabin, upper vent outlets 13, 14 provided in the instrument panel 10 to supply the air-conditioned air passing through the upper vent outlet side duct 41 toward the rear seat side in the cabin, a rear seat occupant detection means for detecting the on-board state of the occupant seated in the rear seat, and an air volume adjusting means for adjusting the supply of the air-conditioned air supplied from the upper vent outlets 13, 14 according to an increase/decrease in the number of the occupants in the rear seat. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner that controls air conditioning of a passenger compartment.

  2. Description of the Related Art A vehicle air conditioner is known in which air conditioning air is blown from a front air conditioner to a rear seat so that rear passenger air conditioning comfort is improved without mounting a rear air conditioner (for example, Patent Document 1). 2).

In the vehicle air conditioner described in Patent Document 1, the air volume adjustment of the conditioned air blown from the front air conditioner to the rear seat is controlled by the room temperature of the front and rear seats. Further, in the vehicle air conditioner described in Patent Document 2, the air volume adjustment of the conditioned air blown from the front air conditioner to the rear seat is performed by a grill provided at the outlet (upper vent outlet) from which the conditioned air blows to the rear seat. Is configured to be manually opened and closed.
JP-A-6-247137 JP 2006-240539 A

  However, in the vehicle air conditioner described in Patent Document 1, air conditioning adjustment of the conditioned air blown toward the rear seat occupant is performed based on the vehicle interior temperature, etc., so even if there is no passenger in the rear seat, However, there is a problem that air conditioning efficiency is deteriorated.

  Further, in the vehicle air conditioner described in Patent Document 2, adjustment of the air volume of the conditioned air blown from the front air conditioner to the rear seats requires manually opening and closing the grill provided at the upper vent outlet. There is a problem in that the air from the upper vent outlet is not adjusted unless the hand or other passengers directly operate the grill operation or the like.

  The present invention has been made in view of the above points, and an object of the present invention is to improve the air conditioning efficiency of a vehicle air conditioner and the comfort of a rear seat occupant with a simple configuration.

  In order to achieve the above object, the present invention provides an air flow path that is provided inside an instrument panel (10) disposed in front of the passenger compartment and through which conditioned air supplied to the passenger compartment passes, and the flow of conditioned air The face duct (40) branched into the vent outlet side duct (42) and the upper vent outlet side duct (41) and the instrument panel (10) toward the downstream side of the vent outlet side Vent outlets (11, 12) that blow out the conditioned air passing through the duct (42) toward the front seat side of the passenger compartment and the instrument panel (10), and pass through the upper vent outlet side duct (41). Upper vent outlets (13, 14) for blowing conditioned air toward the rear seat side of the passenger compartment, rear seat occupant detection means for detecting the riding state of the rear seat occupants, and outlets from the upper vent outlet (13, 14) The amount of air conditioned air blown Airflow adjustment means for adjusting the airflow, and the airflow adjustment means blows out the conditioned air blown from the upper vent outlet (13, 14) when the rear seat occupant detection means detects an increase in the number of rear seat occupants. When the rear seat occupant detection means detects a decrease in the number of rear seat occupants, the amount of conditioned air blown out from the upper vent outlet (13, 14) is decreased.

  Thereby, the air volume of the air-conditioning air blown from the upper vent outlet (13, 14) can be automatically adjusted according to the passenger riding state of the rear seat without the passenger adjusting the air-conditioning air volume. The air conditioning efficiency of the device and the comfort of the rear seat occupant can be improved.

  The air volume adjusting means includes an air conditioning wind adjusting door (43) that adjusts the opening area of the vent outlet (11, 12), and the opening area of the vent outlet (11, 12) by the air conditioning wind adjusting door (43). The amount of conditioned air blown from the upper vent outlet (13, 14) is increased by reducing the size of the upper vent, and the opening area of the vent outlet (11, 12) is increased to increase the upper vent outlet (13, 14). In order to reduce the amount of air conditioned air blown from the air outlet, the air conditioned air blown from the upper vent air outlet (13, 14) is simply configured by providing an air conditioning air adjusting door (43) in the vent air outlet side duct (42). Can be adjusted.

  Further, even when no rear seat occupant is on board, the conditioned air is blown out from the upper vent outlets (13, 14), but the conditioned air adjustment door (43) is open, so the mainstream of the conditioned air is It blows off from a vent blower outlet (11, 12). Therefore, the air volume and speed of the conditioned air blown from the upper vent air outlets (13, 14) are reduced and can be blown out toward the upper body of the front seat occupant without being blown to the rear seat. The air conditioning efficiency of the apparatus can be improved.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view of an essential part of a vehicle having a vehicle air conditioner of the present invention.

  Three rows of seats (front seat 2, second seat 3, and third seat 4) are arranged in the vehicle interior and rear direction. Seats 5 are provided on the seats of the second seat 3 and the third seat 4. The front seat 2 corresponds to the front seat of the present invention, and the second seat 3 and the third seat 4 correspond to the rear seat of the present invention.

  An instrument panel 10 (instrument panel) is disposed in the entire vehicle left-right direction in front of the front seat 2, and an indoor air conditioning unit 1 of the vehicle air conditioner is disposed inside the instrument panel 10. The seating sensor 5 will be described in detail later.

  Next, FIG. 2 shows a perspective view of the instrument panel 10 of the vehicle. As shown in FIG. 2, the instrument panel 10 has vent outlets 11 and 12 for blowing conditioned air toward the front seat side of the vehicle interior and an upper vent outlet 13 for blowing conditioned air toward the rear seat side of the vehicle interior, 14 is provided.

  The vent outlets 11 and 12 face the front seat and are composed of a pair of left and right center vent outlets 11 and side vent outlets 12. The upper vent air outlets 13 and 14 face the upper space of the front seat and are composed of an upper center vent air outlet 13 and an upper side vent air outlet 14.

  A defroster outlet 15 that is opened horizontally is provided at the forefront of the instrument panel 10. Although not shown, a foot outlet is provided below the instrument panel 10 so as to face the feet of the front seat.

  FIG. 3 is a schematic cross-sectional view of the indoor air conditioning unit 1 of the vehicle air conditioner of the present invention.

  First, the indoor air conditioning unit 1 is disposed inside the instrument panel 10 at the foremost part of the vehicle interior and has an air conditioning case 20 that constitutes an outer shell. An air passage through which air flows toward the vehicle interior is formed inside the air conditioning case 20, and an inside / outside air switching box 21 is disposed at the most upstream part of the air flow.

  The inside / outside air switching box 21 has an inside air introduction port 22, an outside air introduction port 23, and an inside / outside air switching door 24. The inside air introduction port 22 is an introduction port for introducing inside air (vehicle compartment air) into the air conditioning case 20, and the outside air introduction port 23 is an introduction port for introducing outside air (vehicle compartment outside air) into the air conditioning case 20.

  The inside / outside air switching door 24 is rotatably arranged inside the inside / outside air switching box 21 and is inside / outside air switching means driven by a servo motor (not shown). 3 shows a state in which the inside air is introduced from the inside air introduction port 22, and the inside air is introduced into the air conditioning case 20 as indicated by an arrow A.

  On the downstream side of the air flow of the inside / outside air switching box 21, an electric blower 25 that blows air toward the vehicle interior is disposed. The blower 25 rotates the well-known centrifugal multiblade fan 25a by an electric motor 25b to blow air in the arrow B direction. An evaporator 26, which is a cooling heat exchanger that cools the blown air, is disposed on the downstream side of the air flow of the blower 25.

  The evaporator 26 is one of the elements constituting a refrigeration cycle (not shown), and as is well known, absorbs heat from the blown air blown by the blower 25 when the low-pressure refrigerant flowing into the evaporator 26 evaporates. To cool the blown air. A heater core 27 that heats the air (cold air) that has passed through the evaporator 26 is disposed on the downstream side of the evaporator 26.

  The heater core 27 is a heating heat exchanger that reheats the air (cold air) that has passed through the evaporator 26 using the engine coolant as a heat source (the engine coolant circuit is not shown). In addition, a bypass passage 28 through which air (cold air) after passing through the evaporator 26 bypasses the heater core 27 and is passed to the side of the heater core 27 inside the air conditioning case 20 is formed.

  An air mix door 29 is disposed between the evaporator 26 and the heater core 27. The air mix door 29 is rotatably disposed in the air conditioning case 20 and is driven by a servo motor (not shown) so that its rotational position (opening) can be continuously adjusted.

  Accordingly, the air volume ratio between the amount of air passing through the heater core 27 (the amount of hot air indicated by arrow C) and the amount of air passing through the bypass passage 28 (the amount of cold air indicated by arrow D) is adjusted by the opening of the air mix door 29. The Since the warm air (arrow C) and the cool air (arrow D) are mixed in the heater core 27 side passage and the downstream side of the bypass passage 28 and blown into the vehicle interior, the air flow rate in the vehicle interior is adjusted by adjusting the air volume ratio. Adjusted.

  In the most downstream part of the air passage of the air conditioning case 20, a defroster opening 30 for blowing the conditioned air toward the front window glass of the vehicle, for blowing the conditioned air toward the upper body of the front seat occupant and the rear seat occupant A total of three types of openings are provided: a face opening 31 and a foot opening 32 for blowing conditioned air toward the feet of the passenger.

  A defroster door 33, a face door 34, and a foot door 35 are rotatably arranged at upstream portions of the openings 30 to 32, respectively, and these doors 33 to 35 are connected to a common servo via a link mechanism (not shown). Opening and closing operation is performed by a motor (not shown). FIG. 2 shows a face mode state in which the face door 34 is opened.

  The defroster opening 30 is connected to the defroster outlet 15 on the upper surface of the vehicle instrument panel 10 via a defroster duct (not shown). The foot opening 32 is connected to a foot outlet (not shown) disposed in the vicinity of the occupant's foot through a foot duct (not shown). The face opening 31 is connected to the vent outlets 11 and 12 and the upper vent outlets 13 and 14 shown in FIGS. 4 (a) and 4 (b) via the face duct 40. The configuration near the face opening 31 will be described in detail later.

  Returning to FIG. 1, the vehicle air conditioner is provided with a control unit 100 (ECU) as control means for performing various controls. The control unit 100 is configured by a known microcomputer including a CPU, a ROM, a RAM, an I / O, and the like, and executes processing such as various calculations according to a program stored in the ROM.

  Next, the seating sensor 5 used in this embodiment will be described in detail. As shown in FIG. 1, the seating sensor 5 provided on the rear seat (second seat 3 and third seat 4) is connected to the control unit 100. The seating sensor 5 is a well-known sensor for individually determining whether or not an occupant is seated in the rear seat. The seating sensor 5 corresponds to a rear seat occupant detection means for detecting the boarding state of the rear seat occupant of the present invention.

  For example, as the seating sensor 5, a normally open switch that is embedded in a seat cushion (sitting portion) constituting the passenger seat and closes (ie, turns on) when a load is applied to the seat cushion from above is used. . The seat cushion is a member that supports the waist when an occupant is seated.

  Next, the configuration near the face opening 31 in the air conditioning case 20 used in the present embodiment will be described in detail with reference to FIG. FIG. 4 is an enlarged view of the portion X in FIG. 3 and shows the face duct 40 arranged on the downstream side of the conditioned air flow in the face opening 31. FIG. 4A shows a case where a rear seat occupant is not on board, and FIG. 4B shows a case where a rear seat occupant is on board.

  As shown in FIGS. 4A and 4B, the face opening 40 is connected to the face opening 31. The face duct 40 branches into a vent outlet side duct 42 and an upper vent outlet side duct 41 on the downstream side. The vent outlet side duct 42 is connected to the vent outlets 11 and 12 disposed in front of the occupant in the instrument panel 10 of the vehicle, and the upper vent outlet side duct 41 is connected to the vent outlet 11 and the vent panel 11 in the instrument panel 10. 12 are connected to upper vent outlets 13 and 14 disposed above 12.

  The vent outlets 11 and 12 are configured to blow conditioned air passing through the vent outlet side duct 42 toward the upper body side of the passenger in the front seat of the vehicle interior, and the upper vent outlets 13 and 14 The conditioned air that passes through the air outlet side duct 41 is blown out from above the front seat toward the upper rear seat of the vehicle interior.

  An air conditioning wind adjusting door 43 is provided in the vent outlet side duct 42. The conditioned air adjusting door 43 is rotatably disposed in the vent outlet side duct 42 and is driven by a servo motor (not shown) to adjust the rotational position (opening), thereby adjusting the vent outlets 11 and 12. The opening area can be adjusted. Here, the conditioned air adjusting door 43 of the present embodiment is constituted by a plate door as shown in FIG.

  By adjusting the opening degree of the conditioned air adjustment door 43, the air volume ratio between the amount of conditioned air blown out from the upper vent air outlets 13 and 14 and the amount of air conditioned air blown out from the vent air outlets 11 and 12 is obtained. Can be adjusted.

  As described above, the face duct 40 is branched into the vent outlet side duct 42 and the upper vent outlet side duct 41 on the downstream side thereof, and the conditioned air flowing through the face duct 40 is separated from the vent outlet side duct 42. The flow is diverted to the upper vent outlet side duct 41. Therefore, by reducing the opening area of the vent outlets 11 and 12 with the conditioned air adjustment door 43, the amount of conditioned air blown out at the upper vent outlets 13 and 14 increases. By increasing the opening area of the vent outlets 11 and 12, the amount of air-conditioned air blown out from the upper vent outlets 13 and 14 is reduced.

  Here, the conditioned air is mainly blown out from the vent outlets 11 and 12, and the upper vent outlets 13 and 14 are used as auxiliary outlets. Therefore, during normal times when no rear seat passenger is on board, the opening area of the vent outlets 11 and 12 is larger than the opening area of the upper vent outlets 13 and 14. Further, since the conditioned air adjusting door 43 is provided in the vent outlet side duct 42, the upper vent outlets 13 and 14 are always open regardless of the opening degree of the conditioned air adjusting door 43, and the conditioned air is adjusted. Has been blown out.

  The servo motor is controlled by the control unit 100 based on the information of the seating sensor 5 and the rotational position of the conditioned air adjustment door 43 is adjusted. For example, when a rear seat occupant is on board, in order to blow out more conditioned air toward the rear seat side, the conditioned air adjustment door 43 is rotated to a position where the opening area of the vent outlets 11 and 12 is reduced, and the upper The air volume and the air speed of the conditioned air blown from the vent outlets 13 and 14 are increased.

  The main operations of the vehicle air conditioner according to this embodiment will be described.

  When the start switch (A / C switch) of the vehicle air conditioner is turned on, the vehicle air conditioner operates. Here, it is assumed that the vehicle air conditioner is set to a face mode in which conditioned air is blown out from the vent outlets 11 and 12 and the upper vent outlets 13 and 14.

  The control unit 100 detects the boarding state of the backseat occupant with the seating sensor 5 and determines whether or not the backseat occupant is on board. The conditioned air generated by the indoor air conditioning unit 1 is guided from the face opening 31 to the face duct 40 inside the instrument panel 10, and is distributed according to the opening degree of the conditioned air adjustment door 43.

  When it is determined from the detection result by the seating sensor 5 that the rear seat occupant is not on board, the air conditioning wind adjusting door 43 blows more air conditioning air from the vent air outlets 11 and 12, so The opening areas of the exits 11 and 12 are adjusted so as to be larger than the case where there is a rear seat occupant (state of FIG. 4A).

  The conditioned air is blown out from the vent outlets 11 and 12 toward the front passenger. Although the conditioned air is blown out from the upper vent outlets 13 and 14 at the same time, since the conditioned air adjustment door 43 is opened, the main stream of the conditioned air is blown out from the vent outlets 11 and 12 having a large opening area (see FIG. 4 (a) state). Further, the conditioned air blown from the upper vent outlets 13 and 14 is blown toward the vicinity of the head of the front seat occupant because the air volume and the wind speed are reduced.

  Thereby, when the rear seat occupant is not on board, the main stream of the conditioned air is blown out from the vent outlets 11 and 12. In addition, the conditioned air is blown out from the upper vent air outlets 13 and 14, but the air conditioned air blown out from the upper vent air outlets 13 and 14 has a smaller air volume and wind speed than the case where there is a rear seat occupant. The air can be blown toward the vicinity of the head of the front seat occupant without being blown to the rear seat. Therefore, the air conditioning efficiency of the vehicle air conditioner can be improved.

  When it is determined from the detection result by the seating sensor 5 that the rear-seat occupant is on board, the air-conditioning air adjusting door 43 vents the opening degree in order to blow more air-conditioning air from the upper vent air outlets 13 and 14. The opening areas of the air outlets 11 and 12 are adjusted to be smaller than the case where there is no rear seat occupant (state of FIG. 4B).

  The conditioned air is blown out from the vent air outlets 11 and 12 toward the front seat occupant. However, since the opening area of the vent air outlets 11 and 12 is reduced by the air conditioned air adjusting door 43, the vent air outlet 11 and The air volume of the conditioned air blown from 12 is reduced.

  In addition, although the conditioned air is blown simultaneously from the upper vent outlets 13 and 14, the opening areas of the vent outlets 11 and 12 are reduced. Therefore, the conditioned air blown out from the upper vent air outlets 13 and 14 has a larger air volume and speed than the case where there is no rear seat occupant, and is blown out upward of the front seat (FIG. 4B). State).

  Thus, when the rear seat occupant is on board, the conditioned air is blown out from the upper vent outlets 13 and 14 toward the rear seat occupant with a simple configuration. The comfort of the seat occupant can be improved.

  As described above, the occupant riding state of the rear seat is detected by the seating sensor 5, and the amount of conditioned air blown from the upper vent outlets 13 and 14 is detected based on the detection result, and the conditioned air adjustment provided in the vent outlet side duct 42 is adjusted. Since the opening degree of the door 43 can be adjusted, the air conditioning efficiency of the vehicle air conditioner and the comfort of the rear seat occupant can be improved with a simple configuration.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, only parts different from the first embodiment will be described.

  In the second embodiment, the rear air blow assist fan 50 is provided in the vehicle air conditioner shown in the first embodiment.

  FIG. 5 is a side view of an essential part of a vehicle provided with a rear-seat-side blowing assist fan 50, which is a vehicle air conditioner according to the present embodiment of the present invention. A rear seat opening (not shown) is provided below the indoor air conditioning unit 1. The rear seat opening is connected to a rear duct 51 that allows the conditioned air to pass to the rear seat side of the vehicle. Here, the rear duct 51 constitutes an air passage through which the conditioned air passes.

  The rear duct 51 is connected to the suction port of the rear seat assist assist fan 50 that again increases the air volume attenuated by the pressure loss due to passing through the indoor air conditioning unit 1. The air outlet of the rear seat side blowing assist fan 50 is connected to the second seat side duct 52 and the third seat side duct 53. A second seat side air outlet 54 is provided at the end of the second seat side duct 52, and a third seat side air outlet 55 is provided at the end of the third seat side duct 53.

  In the above configuration, the conditioned air blown from the upper vent outlets 13 and 14 and the vent outlets 11 and 12 is blown toward the front seat passenger and the rear seat passenger as in the first embodiment.

  At the same time, the conditioned air passing through the rear seat opening passes through the rear duct 51 and is sucked into the suction port of the rear seat side blow assist fan 50 provided in the rear duct 51. Thereafter, the conditioned air is blown out from the blowout outlet of the rear seat side blow assist fan 50 from the second seat side blowout opening 54 provided at the end of the second seat side duct 52, and is provided at the end of the third seat side duct 53. It blows out from the sheet side outlet 55.

  Thereby, the conditioned air blown toward the rear seat occupant from the upper vent air outlets 13 and 14, the conditioned air blown toward the rear seat occupant from the second seat side air outlet 54 and the third seat side air outlet 55, More conditioned air can be distributed to the rear seat occupant, and the comfort of the rear seat occupant can be improved.

(Other embodiments)
In each of the above embodiments, the conditioned air adjustment door 43 is provided in the vent outlet side duct 42, and the amount of conditioned air blown from the vent outlets 11 and 12 and the amount of conditioned air blown from the upper vent outlets 13 and 14, However, it is only necessary to be able to adjust the amount of air conditioned air blown from the upper vent air outlets 13 and 14, and the air conditioned air adjusting door 43 can be adjusted to other than the vent air outlet side duct 42. You may provide in a position.

  Moreover, although the air-conditioning air adjustment door 43 which is an air volume adjustment means which adjusts the blowing amount of the air-conditioning air which blows off from the upper vent blower outlets 13 and 14 is comprised by the board door, it is not restricted to this but adjustment of a different kind A door may be used. For example, a rotary door or the like may be used as the air volume adjusting means.

  In addition, the air conditioning air adjusting door 43 is provided in the vent outlet ducts 42 on both the center vent outlet 11 side and the side vent outlet 12 side to adjust the opening areas of the center vent outlet 11 and the side vent outlet 12. However, the conditioned air conditioning door 43 may be provided only in the vent outlet side duct 42 on the center vent outlet 11 side.

  In the first embodiment, the seating sensor 5 is used as the rear seat occupant detection means for detecting the riding state of the rear seat occupant. However, the present invention is not limited to this, and the riding state of the rear seat occupant is detected. Infrared sensor to detect, voice acquisition means to detect the riding state of the rear seat occupant by the voice on the rear seat side, door opening / closing detection means to detect the presence or absence of the rear seat occupant by opening and closing the rear seat passenger door, Video acquisition means for detecting whether or not a rear seat occupant is boarding based on video may be used as the rear seat occupant detection means.

  In the first embodiment, the amount of conditioned air blown out from the upper vent outlets 13 and 14 is adjusted depending on whether or not the rear seat occupant is on board. However, if the number of rear seat occupants increases, When the amount of conditioned air blown from the vent outlets 13 and 14 is increased and the number of passengers on the rear seat is reduced, the amount of conditioned air blown from the upper vent outlets 13 and 14 is reduced. You may adjust the amount of blowing. This is effective when the number of passengers in the rear seats is large and the temperature in the passenger compartment tends to rise due to the body temperature of the passengers.

  Moreover, although the vehicle air conditioner of each said embodiment is applied to the vehicle which has a 3 row seat in the front-back direction, it is applicable also to the vehicle which has a 2 row seat, and the vehicle which has 4 or more row seats.

It is a principal part side view of the vehicle which has the vehicle air conditioner of the said 1st Embodiment. It is a perspective view of the instrument panel of the vehicle of the first embodiment. It is sectional drawing of the indoor air conditioning unit of the vehicle air conditioner of the said 1st Embodiment. It is the X section enlarged view of FIG. It is a principal part side view of the vehicle which has the vehicle air conditioner of the said 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Indoor air-conditioning unit, 2 ... Front seat, 3 ... Second seat, 4 ... Third seat, 5 ... Seating sensor, 10 ... Instrument panel, 11 ... Center vent outlet, 12 ... Side vent outlet, 13 ... Upper center vent Air outlet, 14 ... Upper side vent air outlet, 40 ... Face duct, 41 ... Upper vent air outlet side duct, 42 ... Vent air outlet side duct, 43 ... Air conditioning air adjustment door, 50 ... Rear seat air outlet assist fan, 51 ... rear duct, 100 ... control unit.

Claims (2)

It is provided inside the instrument panel (10) arranged in the front of the passenger compartment, and constitutes an air passage through which the conditioned air supplied to the passenger compartment passes, and the vent outlet side toward the downstream side of the flow of the conditioned air A face duct (40) branched into a duct (42) and an upper vent outlet side duct (41);
Vent outlets (11, 12) that are provided in the instrument panel (10) and blow out the conditioned air passing through the vent outlet side duct (42) toward the front seat side of the vehicle interior;
An upper vent outlet (13, 14) that is provided in the instrument panel (10) and blows out the conditioned air passing through the upper vent outlet side duct (41) toward the rear seat side of the vehicle interior;
A rear seat occupant detection means for detecting the boarding state of the rear seat occupant;
An air volume adjusting means for adjusting the amount of the conditioned air blown from the upper vent outlet (13, 14);
The air volume adjusting means increases the amount of the conditioned air blown from the upper vent outlet (13, 14) when an increase in the number of rear seat passengers is detected by the rear seat occupant detecting means,
When the rear seat occupant detection means detects a decrease in the number of rear seat occupants, the amount of the conditioned air blown from the upper vent outlet (13, 14) is reduced. apparatus. The air volume adjusting means includes an air conditioning air adjusting door (43) for adjusting an opening area of the vent outlet (11, 12),
Increasing the amount of conditioned air blown from the upper vent outlet (13, 14) by reducing the opening area of the vent outlet (11, 12) by the conditioned air adjustment door (43),
2. The vehicle according to claim 1, wherein an amount of the conditioned air blown from the upper vent blowout opening is reduced by increasing an opening area of the vent blowout opening. Air conditioner.

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