JP2012236575A - Vehicle air-conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle air-conditioning device that controls air conditioning of a specific seat, with a simple configuration.SOLUTION: In the vehicle air-conditioning device 100, an inside air temperature sensor 71 detects air temperature around a driver's seat. Accordingly, a variety of air conditioning are controlled based on the air temperature detected by the inside air temperature sensor 71 while a sense of discomfort of the driver is suppressed. In particular, when a driver's-seat air-conditioning command is given, front passenger-seat-side doors 34 to 36 and a blower 4 are controlled by an air-conditioning ECU 10 to be in a driver's seat mode where the passenger-seat-side doors 34 to 36 are in a shut-off state and blast volume of the blower 4 is reduced. In addition, the air conditioning capacity is controlled by the air conditioning ECU 10 so as to be enhanced in the driver's seat mode further than in a normal mode.

Description

  The present invention relates to a vehicle air conditioner that blows conditioned air toward a plurality of spaces in a vehicle interior.

  Conventional vehicle air conditioners have air conditioning control that blows conditioned air only to the driver's seat. For example, when an occupant is not seated in a seat other than the driver's seat, the duct internal passage leading to another air outlet provided for the seat is closed, and the air blowing from the air outlet is stopped. As a result, energy saving of the vehicle air conditioner in the case of only the driver is achieved.

  In such control in which the air outlets other than the air outlet for the driver's seat are closed, there is a difference in the ambient temperature between the driver's seat and the other seats depending on the presence or absence of the conditioned air. As a result, the difference between the detected temperature of the inside air sensor and the driver's ambient temperature increases, and as a result, there is a problem that the air conditioning control has a sense of incongruity for the driver.

  A technique for solving this problem is disclosed in Patent Document 1. In Patent Document 1, in order to correct the influence caused by closing the air outlets other than the driver's seat, a surface temperature detecting means for detecting the surface temperature of the driver is provided separately from the inside air sensor. And control which correct | amends internal temperature is carried out using a driver | operator's surface temperature. For example, when the outside air temperature is high (for example, in the summer), the inside air temperature that increases due to the effect of closing the air outlets other than the driver's seat is corrected so as to prevent the air from being overcooled.

JP 2005-138793 A

  In the technique described in Patent Document 1 described above, surface temperature detection means, which is a sensor different from the inside air sensor, is provided in order to correct the inside air temperature. Therefore, since another sensor is required to correct the internal temperature, there is a problem that the number of parts increases and the configuration becomes complicated.

  Therefore, the present invention has been made in view of the above-described problems, and an object thereof is to provide a vehicle air conditioner capable of performing air conditioning control of a specific seat with a simple configuration.

  The present invention employs the following technical means in order to achieve the aforementioned object.

The invention according to claim 1 is an air conditioning case (2) in which an air intake (6, 7) is formed on one side and a plurality of air outlets through which air toward the passenger compartment passes is formed on the other side. The plurality of air outlets (20 to 23, 30 to 33, 91 to 93) are opened corresponding to a plurality of seats including at least a specific seat including a driver's seat and other seats, and an air intake port and an air outlet An air conditioning case (2) having a ventilation path through which the blown air passes,
An air conditioner blower (13) for blowing air to the ventilation path of the air conditioning case;
An air conditioner (41, 42) that heats or cools the air blown from the air conditioner blower to produce conditioned air and sends it to a plurality of outlets;
Opening / closing means (34 to 36) that switches between a permission state that allows passage of conditioned air blown from an air outlet that has an air conditioning range other than a specific seat among a plurality of air outlets, and a blocked state that blocks passage of air. )When,
Inside air temperature detecting means (71) for detecting the air temperature around the driver's seat as the inside air temperature;
Control means (10) for controlling the air conditioner blower and the air conditioning unit using the air temperature detected by the inside air temperature detecting means, and performing air conditioning of the vehicle interior,
When a specific seat air conditioning command for air conditioning a specific seat is given, the control means controls the open / close means to a shut-off state as a control for the specific seat state, and from the normal state where the specific seat and other seats are air-conditioned. The air conditioner for vehicles is characterized in that the air conditioning unit is controlled so as to reduce the amount of air blown from the air conditioning blower and to increase the air conditioning capability from the normal state.

  According to the first aspect of the present invention, the inside air temperature detecting means detects the air temperature around the driver's seat as the inside air temperature. Therefore, the control means can perform various types of air-conditioning control according to the inside air temperature while suppressing a sense of incongruity for the driver. Specifically, in the present invention, when a specific seat air conditioning command is given, the open / close means and the air conditioning unit are controlled so that the open / close unit is controlled to be in a shut-off state and the specific seat state is set to reduce the air flow of the air conditioning blower. The blower is controlled by the control means. Since the specific seat includes at least the driver's seat, for example, only the driver's seat, and the driver's seat and the passenger seat are included.

  When the opening / closing means is in the shut-off state, if the air flow rate of the air-conditioning blower remains in the normal state, the number of open air outlets decreases, so from the air outlet with the specific seat in the air-conditioning range than the normal state It is blown out with a large air flow. In such a case, since the air flow rate is different from that in the normal state, the passenger sitting in the specific seat (hereinafter, also referred to as “specific passenger”) may be uncomfortable. Therefore, in the present invention, as described above, the uncomfortable feeling can be suppressed by reducing the air volume of the air-conditioning blower from the normal state.

  Further, the control means controls the air conditioning unit so that the air conditioning capability is increased in the specific seat state than in the normal state. Therefore, for example, when the air conditioning unit is in the cooling operation, the air conditioning unit is controlled to cool the air to a lower temperature side than in the normal state, and in the heating operation, the air is heated to a higher temperature side than in the normal state. Control the air conditioning unit. When the shut-off state is set, the total air volume of the vehicle that is blown into the passenger compartment is reduced, so that the air conditioning performance is lowered. Further, as described above, since the air volume of the air conditioning fan is reduced, the air conditioning performance is further deteriorated. Therefore, by controlling so as to compensate for the lack of air conditioning capability as described above, it is possible to suppress a sense of incongruity with respect to the air conditioning feeling to the specific occupant due to the shut-off state and the decrease in the air flow rate.

  Therefore, air conditioning in the specific seat state can be performed with less discomfort from the normal state for the occupant seated in the specific seat without providing surface temperature detection means or the like as in the prior art. As a result, air conditioning control of a specific seat can be performed with a simple configuration.

In the invention according to claim 2, the control means includes
Using the inside air temperature detected by the inside air temperature detecting means, the target blowing temperature of the air blown into the passenger compartment is determined,
In the normal state, the air conditioning blower and the air conditioning unit are controlled so that the determined target blowing temperature is reached,
When the target air temperature is lower than the inside air temperature, the target air temperature is lower than the threshold value, or the outside air temperature is higher than the threshold value in the specific seat state, the low temperature target air temperature lower than the target air temperature in the normal state Control the air-conditioning unit to reach the temperature,
When the target air temperature is higher than the inside air temperature, the target air temperature is higher than the threshold value, or the outside air temperature is lower than the threshold value in the specific seat state, the target air temperature is higher than the target air temperature in the normal state. The air-conditioning unit is controlled so as to reach a temperature.

  According to the second aspect of the present invention, in the specific seat state, when the target blowing temperature is lower than the inside air temperature, when the target blowing temperature is lower than the threshold, or when the outside air temperature is higher than the threshold, the low temperature target When the air-conditioning unit is controlled by the control means so as to be the blowout temperature and the target blowout temperature is higher than the inside air temperature, the target blowout temperature is higher than the threshold, or the outside air temperature is lower than the threshold, the high temperature target blowout temperature The air conditioning unit is controlled by the control means so that Since the target air temperature determined by the target air temperature determining means is used for the air conditioning control in the normal state, if the target air temperature is used as it is in the specific seat state, the air conditioning capacity becomes insufficient as described above. Therefore, air-conditioning capability is controlled by air-conditioning control using the low-temperature target blowout temperature on the low temperature side during cooling operation such as when the inside air temperature is high, and the high-temperature target blowout temperature on high temperature side during heating operation such as when the inside air temperature is low. We can make up for the shortage. Therefore, it is possible to realize specific seat control that suppresses a sense of incongruity for a specific occupant.

Furthermore, in the invention according to claim 3, the air conditioning unit is
A cooler (41) provided in the air conditioning case for cooling the blown air;
A heater (42) provided in the air conditioning case for heating the blown air;
Air mix means (15) for adjusting the air volume ratio between the air passing through the cooler and the air passing through the heater,
The control means
Determine the air volume ratio using the determined target outlet temperature in the normal state,
In the normal state, the air mixing means is controlled so that the determined air volume ratio is obtained,
When the target blowing temperature is lower than the inside air temperature, the target blowing temperature is lower than the threshold value, or the outside air temperature is higher than the threshold value in the specific seat state, the air that passes through the cooler than the normal air volume ratio The air mix means is controlled so that the ratio of low air volume ratio is high,
When the target blowing temperature is higher than the inside air temperature, the target blowing temperature is higher than the threshold value, or the outside air temperature is lower than the threshold value in the specific seat state, the amount of air passing through the heater is higher than the normal air volume ratio. The air mixing means is controlled so that the ratio becomes a high-temperature air volume ratio with a high ratio.

  According to the third aspect of the present invention, in the specific seat state, when the target blowing temperature is lower than the inside air temperature, when the target blowing temperature is lower than the threshold, or when the outside air temperature is higher than the threshold, If the air mixing means is controlled by the control means so as to be a ratio and the target blowing temperature is higher than the inside air temperature, the target blowing temperature is higher than the threshold value, or the outside air temperature is lower than the threshold value, Thus, the air mix means is controlled by the control means. Since the air volume ratio determined by the air volume ratio determining means is used for air conditioning control in the normal state, if the air volume ratio is used as it is in the specific seat state, the air conditioning capacity becomes insufficient as described above. Therefore, air conditioning control can be compensated for by performing air conditioning control using a low-temperature air volume ratio with a large amount of cooled air during cooling operation and a high-temperature air volume ratio with a large amount of heated air during heating operation. Therefore, it is possible to realize specific seat control that suppresses a sense of incongruity for a specific occupant.

Furthermore, the invention according to claim 4 further includes occupant detection means (77) for detecting the presence or absence of an occupant in each seat,
When it is determined that there is an occupant only in the specific seat based on the detection result of the occupant detection unit, the control unit performs control in the specific seat state.

  According to the fourth aspect of the present invention, when it is determined that there is an occupant only in the specific seat based on the detection result of the occupant detection means, the specific seat can be automatically concentrated and air-conditioned. This eliminates the need for occupant operations, thereby improving convenience in operation. In addition, the code | symbol in the bracket | parenthesis of each above-mentioned means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

1 is a schematic diagram illustrating an overall configuration of a vehicle air conditioner 100 according to a first embodiment. It is a perspective view of the instrument panel 50 vicinity. It is a flowchart in the normal mode of air conditioner ECU10. It is a flowchart in the driver's seat mode of air-conditioner ECU10. It is a graph which shows an example of the relationship between outside temperature and the constant C for correction | amendment. It is a flowchart in the driver's seat mode of 2nd Embodiment. It is a graph which shows an example of an air mix opening degree.

  Hereinafter, a plurality of embodiments for carrying out the present invention will be described with reference to the drawings. In some embodiments, portions corresponding to the matters described in the preceding embodiments are denoted by the same reference numerals, and redundant descriptions may be omitted. In addition, when a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those of the embodiment described in advance. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination does not hinder the combination.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram illustrating an overall configuration of a vehicle air conditioner 100 according to the first embodiment. FIG. 2 is a perspective view showing the interior of the vehicle in which the vehicle air conditioner 100 is provided. The vehicle air conditioner 100 is a so-called auto air conditioner system that is configured to control an air conditioner unit 1 that air-conditions a vehicle interior by an air conditioner ECU 10 in a vehicle such as an automobile equipped with a water-cooled engine for traveling.

  The air-conditioning unit 1 is an air-conditioning unit that can independently adjust the temperature of the driver-side air-conditioned space in the passenger compartment and the passenger-side air-conditioned space, change the air outlet mode, and the like. The driver seat side air-conditioned space is a space including a driver seat and a rear seat behind the driver seat. The passenger seat side air-conditioned space is a space including a passenger seat and a rear seat behind the passenger seat.

  The air conditioning unit 1 includes an air conditioning case 2 that is disposed in front of the vehicle interior of the vehicle and through which the blown air passes. The air conditioning case 2 is formed with an air inlet on one side and a plurality of air outlets through which air toward the vehicle interior passes on the other side. The air conditioning case has a ventilation path through which the blown air passes between the air intake and the air outlet. A blower unit 13 is provided on the upstream side (one side) of the air conditioning case 2. The blower unit (air blower for air conditioning) 13 includes an inside / outside air switching door 3 and a blower 4. The inside / outside air switching door 3 is a suction port switching means that is driven by an actuator such as a servo motor 5 and changes the opening between the inside air suction port 6 and the outside air suction port 7 that are air intake ports.

  Although not specifically shown, the air-conditioning unit 1 is of a type referred to as a complete center placement, and is mounted at a central position in the left-right direction of the vehicle, in the lower part of the instrument panel in front of the passenger compartment. The blower unit 13 is disposed on the vehicle front side of the air conditioning unit 1. The inside air suction port 6 of the blower unit 13 is opened downward on the driver's seat side, and sucks vehicle interior air from the driver's seat side.

  The blower 4 is a centrifugal blower that is rotationally driven by a blower motor 9 controlled by a blower drive circuit 8 and generates an air flow toward the vehicle interior in the air conditioning case 2. The blower 4 blows out the conditioned air blown out from the respective air outlets 20 to 23 and 30 to 33 on the driver seat side and the passenger seat side, which will be described later, toward the driver seat side air conditioned space and the passenger seat side air conditioned space in the passenger compartment. It also has a function to change the air volume.

  The air conditioning case 2 is provided with an evaporator 41 and a heater core 42 as an air conditioning unit that heats or cools the air blown from the blower unit 13 to produce conditioned air and sends it to a plurality of outlets. Specifically, the air conditioning case 2 is provided with an evaporator 41 as a cooler that cools air passing through the air conditioning case 2. Further, on the air downstream side of the evaporator 41, there is provided a heater core 42 as a heater that heats the air passing through the first air passage 11 and the second air passage 12 by exchanging heat with the cooling water of the engine. Yes.

  Each air passage 11, 12 is partitioned by a partition plate 14. For example, in the vehicle air conditioner 100 used for a vehicle that travels using electric power, the evaporator 41 and the heater core 42 may be replaced with a Peltier element. On the air upstream side of the heater core 42, the driver seat side air mix door 15 and the passenger seat side air mix for adjusting the temperature of the driver seat side air conditioned space and the passenger seat side air conditioned space in the passenger compartment independently of each other. A door 16 is provided.

  The air mix doors 15 and 16 are driven by actuators such as servo motors 17 and 18 and are directed from the air outlets 20 to 23 and 30 to 33 on the driver's seat side and the passenger seat side to the air-conditioned spaces in the passenger compartment. Then, the temperature of the conditioned air blown out is changed. In other words, the air mix doors 15 and 16 function as air mix means for adjusting the air volume ratio between the air passing through the evaporator 41 and the air passing through the heater core 42.

  The evaporator 41 is a component of a refrigeration cycle (not shown). The refrigeration cycle is driven by a belt drive or an electric motor driven by an output shaft of a vehicle running engine mounted in an engine room of the vehicle, and compresses and discharges refrigerant, and refrigerant discharged from the compressor. A condenser for condensing and liquefying, a receiver for gas-liquid separation of the liquid refrigerant flowing from the capacitor, an expansion valve for adiabatically expanding the liquid refrigerant flowing from the receiver, and a gas-liquid two-phase refrigerant flowing from the expansion valve And an evaporator 41 for evaporating and vaporizing.

  In the compressor in the refrigeration cycle, the compression capacity is varied by a control current output from the air conditioner ECU 10. In the present embodiment, an electromagnetic type that performs variable capacity control based on a control signal output in accordance with a comparison result between the post-evaporation temperature (TE) detected by the post-evaporation temperature sensor 74 and the target post-evaporation temperature (TEO). A variable capacity compressor having a variable capacity control valve is used.

  As shown in FIG. 1, on the other side of the air conditioning case 2, that is, on the air downstream side of the first air passage 11, a driver seat side defroster outlet 20, a driver seat side center face outlet 21, and a driver seat side face face outlet are provided. The outlet 22 and the driver's seat side foot outlet 23 communicate with each other through each outlet duct. As shown in FIG. 1, on the downstream side of the second air passage 12, as shown in FIG. 1, a passenger seat side defroster outlet 30, a passenger seat side center face outlet 31, a passenger seat side face outlet 32, and a passenger seat The side foot outlet 33 communicates with each other through each outlet duct.

  The driver's seat side and passenger's seat side defroster air outlets 20 and 30 constitute air outlets for blowing conditioned air to the front window glass of the vehicle. The driver-seat-side and passenger-seat-side face outlets 21, 22, 31, and 32 constitute an outlet for blowing air-conditioned air to the head and chest of the driver and passenger seat passengers. The driver's seat side and passenger's seat side foot outlets 23 and 33 constitute outlets for blowing air-conditioned air to the feet of the driver and passenger seat passengers.

  Although not shown in FIG. 1, as shown in FIG. 2, the rear seat side center face outlet 91, the rear seat side face outlet 92, and the rear seat side foot outlet 93 are provided as outlets to the rear seat. Are formed on the downstream side of the first air passage 11 and the second air passage 12, respectively.

  In the first and second air passages 11 and 12, as the driver seat side and passenger seat side outlet switching doors for setting the blowing mode on the driver seat side and the passenger seat side in the passenger compartment independently of each other, A driver seat side defroster door 24 and a passenger seat side defroster door 34, a driver seat side face door 25 and a passenger seat side face door 35, a driver seat side foot door 26 and a passenger seat side foot door 36 are provided.

  The driver seat side and passenger seat side air outlet switching doors 24 to 26, 34 to 36 are driven by actuators such as servo motors 28, 29, 38, and 39, and switch the blow mode between the driver seat side and the passenger seat side, respectively. The passenger seat side air outlet switching doors 34 to 36 are air outlets 30 to 36 having a remaining seat excluding the driver's seat (driver's seat) of the vehicle among the plurality of air outlets 20 to 23 and 30 to 33. Opening / closing means that switches between a permission state that allows passage of the conditioned air blown from 33 and a blocking state that blocks passage. The air conditioning range refers to a range in which the conditioned air blown from each of the outlets 20 to 23 and 30 to 33 mainly circulates, such as a seat in the outlet direction and the outlet direction of each of the outlets 20 to 23 and 30 to 33. Determined by the obstacles. The driver side and passenger side outlet modes include, for example, a face mode, a bi-level (B / L) mode, a foot mode, a foot / defroster mode, and a defroster mode.

  Next, control of the vehicle air conditioner 100 will be described. The air conditioner ECU 10 is a control means, and when an ignition switch for starting and stopping the engine is turned on, a DC power is supplied from a battery (not shown) which is an in-vehicle power source mounted on the vehicle, and an arithmetic process or The control process is configured to start. The air conditioner ECU 10 is configured such that each switch signal is input from various operation switches on an air conditioner operation panel 90 that is integrally installed on the instrument panel 50.

  Although not shown, the air conditioner operation panel 90 includes, for example, a liquid crystal display, an inside / outside air changeover switch, a front defroster switch, a rear defroster switch, a dual switch, a blowout mode changeover switch, a blower air volume changeover switch, an air conditioner switch, an auto switch, and off. A switch, a temperature setting switch, and a driver's seat air conditioning switch are installed.

  The liquid crystal display includes, for example, a set temperature display unit that visually displays the set temperatures of the driver side and passenger side air conditioning spaces, a blow mode display unit that visually displays the blow mode, and an air volume display unit that visually displays the blower air volume. Is provided. The liquid crystal display may be provided with, for example, an outside air temperature display unit, a suction mode display unit, and a time display unit. Various operation switches on the air conditioner operation panel 90 may be provided on the liquid crystal display.

  The air conditioner operation panel 90 will be described with respect to various switches. The front defroster switch corresponds to an air conditioning switch that commands whether or not to increase the antifogging ability of the front window glass, and is a defroster mode requesting unit that requests to set the blowing mode to the defroster mode. The dual switch is a left / right independent control command means for commanding left / right independent temperature control in which temperature adjustment in the driver's seat side air conditioning space and temperature adjustment in the passenger seat side air conditioning space are performed independently of each other. The mode change switch is a mode request means for requesting to set the blowing mode to any one of the face mode, the bi-level (B / L) mode, the foot mode, and the foot / defroster mode according to the manual operation of the occupant. is there. The air conditioner switch is an air conditioning operation switch that commands the operation or stop of the compressor of the refrigeration cycle. The air conditioner switch is provided in order to improve fuel efficiency by deactivating the compressor and reducing the rotational load of the engine. The temperature setting switch is a driver-seat-side and passenger-seat-side temperature setting means for setting (Tset) the temperatures in the driver-side air-conditioned space and the passenger-side air-conditioned space to desired temperatures, respectively. The driver's seat air conditioning switch is an input unit that requests to set the air conditioning mode to a driver's seat mode, which will be described later, in accordance with the manual operation of the passenger.

  Although not shown, the air conditioner ECU 10 includes functions such as a CPU (central processing unit) that performs arithmetic processing and control processing, a memory such as ROM and RAM, and an I / O port (input / output circuit). The well-known microcomputer comprised by these is provided. Sensor signals from various sensors are A / D converted by an I / O port or an A / D conversion circuit and then input to a microcomputer. The air conditioner ECU 10 includes an inside air temperature sensor 71 as an inside air temperature detecting means for detecting the air temperature (inside air temperature) Tr around the driver's seat, and an outside air temperature sensor as an outside air temperature detecting means for detecting the outside temperature (outside air temperature) of the passenger compartment. 72 and a solar radiation sensor 73 as solar radiation detection means are connected. Further, the air conditioner ECU 10 detects the air temperature immediately after passing through the evaporator 41 (post-evaporation temperature TE), a post-evaporation temperature sensor 74 as a post-evaporation temperature detection means, detects the engine coolant temperature of the vehicle, and heats the blown air. A cooling water temperature sensor 75 as a heating temperature detection means for temperature, a humidity sensor 76 as a humidity detection means for detecting the relative humidity in the passenger compartment, a seating sensor 77 as an occupant detection means for detecting the presence or absence of an occupant in each seat, and the like Is connected.

  For the inside air temperature sensor 71, the outside air temperature sensor 72, the post-evaporation temperature sensor 74, and the cooling water temperature sensor 75, for example, temperature sensitive elements such as thermistors are used. The inside air temperature sensor 71 is set to a site that hardly affects even if the air outlet other than the driver's seat near the driver's seat (for example, inside the instrument panel 50 near the steering) is closed. Further, the solar radiation sensor 73 has a driver seat side solar radiation intensity detecting means for detecting the solar radiation amount (solar radiation intensity) irradiated in the driver seat side air conditioned space, and the solar radiation amount (solar radiation intensity) irradiated in the passenger seat side air conditioned space. For example, a photodiode is used. The humidity sensor 76 is housed in a recess formed in the front surface of the instrument panel 50 in the vicinity of the driver's seat, for example, together with the inside air temperature sensor 71, and it is determined whether or not it is necessary to blow out the defroster to prevent the front window glass from being fogged. Used for

  Next, a control method by the air conditioner ECU 10 will be described with reference to FIG. FIG. 3 is a flowchart showing an example of processing in the normal mode (all seats mode) of the air conditioner ECU 10. First, when the ignition switch is turned on and DC power is supplied to the air conditioner ECU 10, the control program shown in FIG. 3 stored in advance in the memory is executed.

  In step S11, the contents stored in the data processing memory built in the microcomputer in the air conditioner ECU 10 are initialized, and the process proceeds to step S12. In step S12, various data are read into the data processing memory, and the process proceeds to step S13. Therefore, in step S12, switch signals from various operation switches on the air conditioner operation panel 90 and sensor signals from various sensors are input. As the sensor signal, for example, the vehicle interior temperature Tr detected by the internal air temperature sensor 71, the external air temperature Tam detected by the external air temperature sensor 72, the solar radiation amount Ts detected by the solar radiation sensor 73, and the post-evacuation temperature detected by the post-evaporation temperature sensor 74 are detected. Te and the cooling water temperature Tw detected by the cooling water temperature sensor 75.

  In step S13, the input data is substituted into the stored arithmetic expression to calculate the target blowing temperature TAO (Dr) on the driver's seat side and the target blowing temperature TAO (Pa) on the passenger seat side. Then, the target post-evaporator temperature TEO is calculated from the target blowing temperatures TAO (Dr) and TAO (Pa) on the passenger side and the outside air temperature Tam, and the process proceeds to step S14.

  An example of the arithmetic expression used in step S13 is shown in Expression 1.

TAO = Kset × Tset−Kr × Tr−Kam × Tam−Ks × Ts + C (1)
Here, Tset is the set temperature set by the temperature setting switch, Tr is the inside air temperature detected by the inside air temperature sensor 71, Tam is the outside air temperature detected by the outside air temperature sensor 72, and Ts is the solar radiation sensor 73. This is the amount of solar radiation detected at. Kset, Kr, Kam, and Ks are gains, and C is a correction constant for the whole. Therefore, the air conditioner ECU 10 has a function as a target air temperature determining unit that determines the target air temperature using the air temperature detected by the internal air temperature sensor 71.

  In step S14, the blower air volume, that is, the blower control voltage VA to be applied to the blower motor 9 is calculated based on the calculated target blow temperature TAO (Dr), TAO (Pa) on the driver's seat and passenger's side, and the process proceeds to step S15. . For the blower control voltage VA, the blower control voltages VA (Dr) and VA (Pa) respectively adapted to the target blowing temperatures TAO (Dr) and TAO (Pa) on the driver's seat side and the passenger seat side are set in a predetermined characteristic pattern. It is obtained by averaging these blower control voltages VA (Dr) and VA (Pa).

  In step S15, the calculated target blowing temperatures TAO (Dr) and TAO (Pa) on the driver's seat side and the passenger's seat side and the input data in step S12 are substituted into the arithmetic expression stored in the memory to drive the vehicle. The air mix opening SW (Dr) (%) of the seat side air mix door 15 and the air mix opening SW (Pa) (%) of the passenger side air mix door 16 are calculated, and the process proceeds to step S16. Therefore, the air conditioner ECU 10 has a function as air volume ratio determining means for determining the air mix opening degree using the target blowing temperature.

  In step S16, based on the target blowing temperature TAO (Dr) and TAO (Pa) on the driver side and passenger side calculated in step S13, the air flow suction mode to be taken into the passenger compartment and the air to be blown into the passenger compartment. The flow blowing mode is determined, and the process proceeds to step S17.

  In step S17, the target outlet temperatures TAO (Dr) and TAO (Pa) calculated in step S13 and the actual post-evaporator temperature Te detected by the post-evaporator temperature sensor 74 coincide with each other. Then, a control current value for setting the compressor to the target discharge amount is determined by feedback control (PI control), and the process proceeds to step S18. Specifically, the solenoid current (control current: In), which is the target value of the control current supplied to the electromagnetic solenoid of the electromagnetic capacity control valve attached to the compressor, is calculated based on the arithmetic expression stored in the memory. To do.

  In step S18, a control signal is output to the blower drive circuit 8 so that the blower control current VA calculated in step S14 is obtained, and the process proceeds to step S19. In step S19, a control signal is output to the servomotors 17 and 18 so that the air mix openings SW (Dr) and SW (Pa) determined in step S15 are obtained, and the process proceeds to step S110.

  In step S110, a control signal is output to the servomotors 28, 29, 38, and 39 so that the suction mode and the blowing mode determined in step S16 are obtained, and the process proceeds to step S111. In step S111, the solenoid current (control current: In) determined in step S17 is output to the electromagnetic solenoid of the electromagnetic capacity control valve attached to the compressor, the process returns to step S12, and the processes from step S12 to step S111 are performed. repeat. By repeating such a series of processes, the passenger compartment temperature set by the passenger can be obtained.

  Next, an example of control related to the driver seat mode by the air conditioner ECU 10 will be described with reference to FIG. The driver seat mode is a control mode in which at least one specific seat out of each seat (all seats) is concentrated and air-conditioned. In the present embodiment, the specific seat is set as a driver seat. FIG. 4 is a flowchart showing an example of a control program of the air conditioner ECU 10 in the driver seat mode. The process shown in FIG. 4 is performed in parallel with the process in FIG.

  When the flow starts, in step S21, it is determined from the signal corresponding to the presence / absence of the occupant in each seat detected by the seating sensor 77, and the process proceeds to step S22. If there are passengers other than the driver, the process moves to step S26, and the normal air conditioning control shown in FIG. 3 is performed in step S26. If the driver is only the driver, the driver's seat air conditioning command is given to air-condition the driver's seat. Is transferred to step S23.

  In step S23, since there is an occupant only in the driver's seat, the input data is substituted into the stored arithmetic expression for the driver's seat mode to calculate the target outlet temperature TAO (Dr) on the driver's seat side, and the target outlet The target post-evaporator temperature TEO is calculated from the temperature TAO (Dr) and the outside air temperature Tam, and the process proceeds to step S24. Thus, the target blowing temperature is used for the operation mode. Specifically, in the cooling mode, the target blowing temperature is determined to be a low temperature target blowing temperature that is lower than the target blowing temperature in the normal mode. Further, in the case of the heating mode, the high temperature target blow temperature is determined to be higher than the target blow temperature in the normal mode.

  In step S24, the blower air volume for the driver's seat mode is calculated (the blower control voltage VA is calculated) based on the calculated target outlet temperature TAO (Dr) for the driver's seat mode so that the calculated blower control current VA is obtained. Then, a control signal is output to the blower drive circuit 8, and the process proceeds to step S25. As a result, in the driver seat mode, the blower air volume for the driver seat mode is determined to be lower than that in the normal mode.

  In step S25, since the occupant is only the driver, the suction blowing mode is changed to the “driver's seat mode” as a mode for adjusting the temperature of the driver's seat space, and this flow is ended. For example, the suction mode is the inside air mode, and the inside / outside air switching door 3 opens the inside air suction port 6 located below the driver's seat side. Also, all the air outlets 30 to 33 opened in the passenger seat side air-conditioned space with no occupant are closed by the corresponding doors 34 to 36 (for example, the air outlet surrounded by the phantom line in FIG. 2 is closed and the air outlet surrounded by the solid line is open). When the air-conditioning mode is the cooling mode (cooling operation), the bi-level blowing mode in which both the face outlets 21 and 22 and the foot outlet 23 are opened at the doors 24 to 26 on the driver's seat side. As a cold air blowout. Further, when the air conditioning mode is the heating mode (heating operation), warm air is blown out as a foot blowing mode in which only the foot outlet 23 is opened at each of the doors 24 to 26 on the driver's seat side. Moreover, the blowing mode during heating may be the same bi-level blowing mode as during cooling. As a result, the conditioned air is blown only to the driver's seat space, so that the driver's seat space can be brought close to the set temperature efficiently.

  Thereby, the air conditioner ECU 10 can set the driver's seat mode to adjust the temperature of the driver's seat space when it is determined from the detection result of the seating sensor 77 that only the driver is the driver. Specifically, among the plurality of outlets 20 to 23 and 30 to 33, the outlets 30 to 33 that are opened outside the driver's seat space are all shut off at the corresponding doors 34 to 36, and the blower is sent. The air volume is reduced and the target blowing temperature is set for the driver's seat mode. As a result, the conditioned air is blown out only to the driver's seat space, and the driver's seat space can be brought close to the set temperature efficiently. Moreover, since only the driver's seat space is air-conditioned, the power required for air-conditioning can be reduced.

  In the processing shown in FIG. 4, for example, when a driver's seat air conditioning switch that is one of various operation switches on the air conditioner operation panel 90 is operated by a passenger, a driver's seat air conditioning command (specific seat air conditioning command) is given. As such, control may be performed so as to execute the processing from step S23. As a result, the air conditioner ECU 10 can be in a mode for rapidly adjusting the temperature of the driver's seat space when a driver's seat air conditioning switch, which is an input means for inputting a driver's seat air conditioning command, is operated. Therefore, the same effect as the air conditioning effect of the driver's seat space described with reference to FIG. 4 can be achieved.

  Next, calculation of the target blowing temperature in the driver seat mode in step S23 of FIG. 4 will be described. FIG. 5 is a graph showing an example of the relationship between the outside air temperature and the correction constant C. As shown in FIG. 5, the correction constant C in Equation 1 described above is a constant value as indicated by a virtual line in FIG. 5 in the normal mode. On the other hand, in the driver's seat mode, the correction constant C is changed according to the outside air temperature. Thus, when the outside air temperature is high (for example, in summer), the constant C is made smaller than that in the normal mode, and when the outside air temperature is low (for example, in winter), the constant C is made larger than in the normal mode. As a result, the target blowing temperature in the driver's seat mode is the low-temperature target blowing temperature lower than the target blowing temperature in the normal mode in the cooling mode (that is, when the internal air temperature is higher than the target blowing temperature) as described above. To be determined. In the case of the heating mode (that is, when the internal air temperature is lower than the target blowing temperature), the high temperature target blowing temperature that is higher than the target blowing temperature in the normal mode is determined.

  As described above, in the vehicle air conditioner 100 of the present embodiment, the inside air temperature sensor 71 detects the air temperature around the driver's seat. Specifically, the inside air temperature sensor 71 is installed at a position where the detection value of the inside air temperature sensor 71 is hardly affected even when the air outlet other than the air outlet for the driver seat near the driver seat is closed. Therefore, various air-conditioning controls can be performed with the air temperature detected by the internal air temperature sensor 71 while suppressing discomfort to the driver without providing a surface temperature detecting means or the like as in the prior art. Specifically, when a driver's seat air conditioning command is given in the normal mode, the passenger's seat side doors 34 to 36 are controlled to be in a shut-off state, and the passenger seat is set so as to be in the driver's seat mode in which the blower 4 blows air. The side doors 34 to 36 and the blower 4 are controlled by the air conditioner ECU 10.

  When the passenger seat side doors 34 to 36 are in the shut-off state, if the blower 4 remains in the normal mode, the number of open air outlets is reduced. The air is blown out with a larger air volume than in the normal mode. In such a case, since the air flow rate is different from that in the normal mode, an uncomfortable feeling is given to the passenger sitting in the driver's seat. Therefore, in the present embodiment, as described above, the uncomfortable feeling can be suppressed by reducing the amount of air blown from the blower 4 than in the normal mode (see step S34 in FIG. 4).

  In the driver's seat mode, the air conditioner ECU 10 controls to increase the air conditioning capability. For example, in the cooling mode, the air conditioner ECU 10 controls the air conditioning unit 1 to cool the air to a lower temperature side than the normal mode. In that case, the air conditioning unit 1 is controlled so as to heat the air to a higher temperature side than in the normal mode (see step S33 in FIG. 4). When the shut-off state is set, the total air volume of the vehicle that is blown into the passenger compartment is reduced, so that the air conditioning performance is lowered. Further, as described above, since the air flow rate of the blower 4 is reduced, the air conditioning performance is further deteriorated. Therefore, by controlling so as to compensate for the shortage of air conditioning capability as described above, it is possible to suppress a sense of discomfort with respect to the air conditioning feeling to the driver's seat occupant due to the shut-off state and the reduction of the air flow.

  Therefore, air conditioning in the driver's seat mode can be performed with less discomfort with the normal mode for passengers seated in the driver's seat without providing surface temperature detection means or the like as in the prior art. Thus, air conditioning control of the driver's seat can be performed with a simple configuration.

  Further, in the present embodiment, the air conditioning ECU 1 is controlled by the air conditioner ECU 10 so that the low-temperature target blowing temperature is set in the cooling mode in the driver seat mode, and the high target blowing temperature is set in the heating mode in the driver seat mode. Thus, the air conditioning unit 1 is controlled by the air conditioner ECU 10. Since the target blowing temperature determined by the air conditioner ECU 10 is used for air conditioning control in the normal mode, if the target blowing temperature is used as it is in the driver's seat mode, the air conditioning capability becomes insufficient as described above. Therefore, the air conditioning capability deficiency can be compensated by performing air conditioning control using the low temperature target blow temperature on the low temperature side in the cooling mode and the high temperature target blow temperature on the high temperature side in the heating mode. Accordingly, it is possible to realize driver seat control that suppresses a sense of discomfort for the driver seat occupant.

  Furthermore, in this embodiment, when it is determined that there is an occupant only in the driver's seat based on the detection result of the seating sensor 77, so to speak, the driver's seat can be automatically concentrated and air-conditioned (see step S32 in FIG. 4). ). This eliminates the need for occupant operations, thereby improving convenience in operation.

  In other words, the operation and effect of the vehicle air conditioner 100 according to the present embodiment is reduced in the fuel-saving mode such as the driver's seat mode in which the power required for air conditioning is reduced without using another sensor as in the prior art. It can be implemented as a mode that prevents the above. Therefore, it can be achieved without a new correction sensor that the air conditioning feeling of the driver's seat deteriorates due to the effect of closing the air outlets other than the driver's seat in the fuel saving mode.

  Further, in the blowout temperature control (wind temperature) shown in FIG. 4, there is means for changing the necessary blowout temperature depending on the mode such as the normal mode and the fuel saving mode, and the changing means corrects the correction constant C in Equation 1, Control is performed in such a manner that the blowing temperature decreases in summer and the blowing temperature increases in winter. The purpose is to solve the problem that the driver's seat gets hot in the summer and gets cold in the winter because closing the outlets other than the driver's seat in the fuel saving mode lowers the total air volume of the vehicle and lowers the air conditioning performance. Is. In the fuel saving mode, since the output of the blower 4 is also reduced so as not to change the wind speed feeling of the driver's seat, the above-described deterioration in the air conditioning performance becomes more remarkable.

  The prior art described in Patent Document 1 corrects the inside air sensor temperature to rise and the outside air temperature to fall to the lower side of the inside air sensor in summer by closing the air outlets other than the driver's seat in the fuel saving mode. Although the control is performed in the direction of increasing the blowing temperature, the current control is performed in the direction of decreasing the blowing temperature in order to eliminate the feeling that the driver occupant feels hot by closing the outlets other than the driver's seat. (Control in the reverse direction in winter) This makes it possible to improve fuel efficiency and ensure passenger comfort through centralized control without new sensors or complicated correction processing.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a flowchart showing an example of a control program of the air conditioner ECU 10 in the driver seat mode of the second embodiment. The present embodiment is characterized in that the air mix opening is changed for the driver's seat mode instead of the processing in step S33 of FIG. 4 described above.

  When the flow shown in FIG. 6 is started, in step S31, as in step S21, it is determined whether or not the occupant is only the driver. If there are occupants other than the driver, the process proceeds to step S36. If is only the driver, the process proceeds to step S33.

  In step S33, since there are passengers only in the driver's seat, the target air temperature in the normal mode and the input data in step S12 are substituted into the arithmetic expression for the driver's seat mode stored in the memory, and the driver's seat side air The air mix opening SW (Dr) (%) of the mix door 15 is calculated, a control signal is output to the servo motor 17 so that the calculated air mix opening SW (Dr) is obtained, and the process proceeds to step S34.

  In step S34, the blower air volume is calculated based on the target blow temperature TAO (Dr) for the normal mode, the calculated blower air volume is decreased for the driver's seat mode (for example, less than half), and the blower control of the calculated blower air volume is performed. A control signal is output to the blower drive circuit 8 so as to obtain the current VA, and the process proceeds to step S35. As a result, in the driver seat mode, the blower air volume for the driver seat mode is determined to be lower than that in the normal mode.

  In step S35, since the occupant is only the driver, the suction blowing mode is changed to the “driver's seat mode” as a mode for adjusting the temperature of the driver's seat space, and this flow is ended.

  Thereby, the air conditioner ECU 10 can set the driver's seat mode to adjust the temperature of the driver's seat space when it is determined from the detection result of the seating sensor 77 that only the driver is the driver. Specifically, among the plurality of outlets 20 to 23 and 30 to 33, the outlets 30 to 33 that are opened outside the driver's seat space are all shut off at the corresponding doors 34 to 36, and the blower is sent. The air volume is reduced, and the air mix opening is set for the driver's seat mode. As a result, the conditioned air is blown out only to the driver's seat space, and the driver's seat space can be brought close to the set temperature efficiently. Moreover, since only the driver's seat space is air-conditioned, the power required for air-conditioning can be reduced.

  Next, calculation of the air mix opening degree in the driver seat mode in step S33 of FIG. 6 will be described. FIG. 7 is a graph showing an example of the relationship between the calculated air mix opening (air volume ratio) and the actual air mix opening. As shown in FIG. 7, the air mix opening calculated in the normal mode and the actual air mix opening are equal as shown by the phantom line in FIG. On the other hand, in the driver's seat mode, the calculated air mix opening is corrected and the actual air mix opening is not equal to the calculated air mix opening. As a result, when the outside air temperature is high (for example, in summer), the ratio of the cooled air is larger than that in the normal mode, and when the outside air temperature is low (for example, in winter), the air is heated more than in the normal mode. Increase the proportion of air. As a result, the air mix opening degree in the driver's seat mode has a higher proportion of air passing through the evaporator 41 than the air mix opening degree in the normal mode in the cooling mode (that is, when the outside air temperature is high) as described above. It is determined at the low temperature air mix opening. In the heating mode (that is, when the outside air temperature is low), the high-temperature air mix opening degree is determined such that the ratio of the air passing through the heater core 42 is higher than the air mixing opening degree in the normal mode.

  As described above, in the present embodiment, in the cooling mode in the driver's seat mode, the driver's seat side air mix door 15 is controlled by the air conditioner ECU 10 so as to obtain the low-temperature air volume ratio, and in the heating mode in the driver's seat mode, The driver's seat side air mix door 15 is controlled by the air conditioner ECU 10 so as to obtain a high-temperature air volume ratio. Since the air mix opening determined by the air conditioner ECU 10 is used for air conditioning control in the normal mode, if the air mix opening is used as it is in the driver's seat mode, the air conditioning capacity becomes insufficient as described above. Therefore, it is possible to make up for the lack of air conditioning capability by controlling the air conditioning using the low temperature air mix opening with a lot of cooled air in the cooling mode and the high temperature air mixing opening with a lot of heated air in the heating mode. . Therefore, it is possible to realize a driver seat mode that suppresses a sense of incongruity with respect to the driver's seat passenger.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the first embodiment described above, in the case of the driver's seat mode, the correction constant C is changed and the target outlet temperature is changed for the driver's seat mode. However, the present invention is not limited to such control. You may control to set the target blowing temperature for modes. Therefore, separately from Formula 1 for the normal mode, the target outlet temperature for the normal mode may be calculated using a calculation formula for the driver's seat mode.

  In the first embodiment described above, the specific seat (specific seat state) is the driver seat (driver seat state). However, the specific seat is not limited to the driver seat, and the front seat including the driver seat and the passenger seat is the specific seat. The air conditioning range including the front seat and the normal air conditioning range may be switched. Further, control may be performed so that the three modes of the driver's seat mode, the front seat mode, and the normal mode (normal state) can be switched.

  In the first embodiment described above, the inside air temperature and the target blowing temperature are compared. However, the present invention is not limited to such control. If the target blowing temperature is higher than a preset threshold value, or the outside air temperature is set in advance. When it is lower than the set threshold value, the air conditioning unit 1 may be controlled to cool the air to a lower temperature side than the normal mode. Further, when the target blowing temperature is higher than the threshold value, or when the outside air temperature is lower than the threshold value, the air conditioning unit 1 may be controlled to heat the air to a higher temperature side than the normal mode. Such control can also be controlled to compensate for the lack of air conditioning capability.

  In the second embodiment described above, the inside air temperature and the target blowing temperature are compared. However, the present invention is not limited to such control. If the target blowing temperature is higher than a preset threshold value, or the outside air temperature is set in advance. When it is lower than the set threshold value, the driver's seat side air mix door 15 may be controlled by the air conditioner ECU 10 so that the low-temperature air volume ratio is obtained. Further, when the target blowing temperature is higher than the threshold value, or when the outside air temperature is lower than the threshold value, the driver's seat side air mix door 15 may be controlled by the air conditioner ECU 10 so as to obtain a high-temperature air volume ratio. Such control can also be controlled to compensate for the lack of air conditioning capability.

  In the first embodiment described above, a seating sensor disposed on the seat is used to detect the presence or absence of an occupant at each seat, but an IR (non-contact infrared temperature) sensor disposed on an instrument panel or the like, You may make it detect the presence or absence of the passenger | crew of each seat. In addition, the presence / absence of an occupant in each seat may be estimated by using a seat belt fitting signal or an opening / closing signal of each seat door, or the presence / absence of an occupant in each seat may be determined by combining these means. You may do.

  In the first embodiment described above, the actuator is realized by a servo motor. However, the actuator is not limited to the servo motor, and the remaining actuators such as bimetal and shape memory alloy may be used.

DESCRIPTION OF SYMBOLS 1 ... Air-conditioning unit 2 ... Air-conditioning case 6 ... Inside air inlet (air intake)
7 ... Outside air inlet (air intake)
10. Air conditioner ECU (control means)
13 ... Blower unit (air conditioning fan)
15 ... Driver side air mix door (air mix means)
20 ... Driver side defroster outlet (air outlet)
21 ... Driver side center face outlet (air outlet)
22 ... Driver seat side face outlet (air outlet)
23 ... Driver's side foot outlet (air outlet)
24 ... Driver's seat side defroster door 25 ... Driver's seat side face door 26 ... Driver's seat side foot door 30 ... Passenger seat side defroster outlet (air outlet)
31 ... Passenger side center face air outlet (air outlet)
32 ... Passenger side air outlet (air outlet)
33 ... Foot outlet on the passenger's seat side (air outlet)
34 ... Defroster door on passenger side (opening / closing means)
35 ... Passenger side door (opening / closing means)
36 ... Passenger side foot door (opening / closing means)
41 ... Evaporator (cooler)
42 ... Heater core (heater)
71 ... Inside air temperature sensor (inside air temperature detecting means)
77. Seating sensor (occupant detection means)
91 ... Rear seat side center face outlet (air outlet)
92 ... Rear seat side face air outlet (air outlet)
93 ... Rear seat side foot outlet (air outlet)
100 ... Vehicle air conditioner

Claims (4)

An air conditioning case (2) in which an air inlet (6, 7) is formed on one side and a plurality of air outlets through which air toward the passenger compartment passes is formed on the other side. -23, 30-33, 91-93) open corresponding to a plurality of seats including at least a specific seat including a driver's seat and other seats, and blown air between the air intake and the outlet. An air conditioning case (2) having a ventilation path through which
An air conditioner blower (13) for blowing air to the ventilation path of the air conditioning case;
An air conditioning unit (41, 42) that heats or cools the air blown from the air conditioning blower to form an air conditioned air and sends the air conditioned air to the plurality of outlets;
Opening / closing means for switching between a permission state that allows passage of conditioned air blown from an outlet having the other seats other than the specific seat as an air-conditioning range among the plurality of outlets, and a blocking state that blocks the passage ( 34-36),
Inside air temperature detecting means (71) for detecting the air temperature around the driver's seat as the inside air temperature;
Control means (10) for controlling the air-conditioning blower and the air-conditioning unit using the air temperature detected by the inside-air temperature detecting means and air-conditioning the vehicle interior,
The control means controls the opening / closing means to the shut-off state and controls the specific seat and the other seats as control of the specific seat state when a specific seat air conditioning command for air conditioning the specific seat is given. An air conditioner for a vehicle, wherein the air conditioning unit is controlled so that the amount of air blown by the air conditioner blower is smaller than that in a normal state and the air conditioning capacity is increased as compared with the normal state. The control means includes
Using the inside air temperature detected by the inside air temperature detecting means, a target blowing temperature of air blown into the vehicle interior is determined,
In the case of the normal state, the air-conditioning blower and the air-conditioning unit are controlled so as to become the determined target blowing temperature,
In the specific seat state, when the target blowing temperature is lower than the inside air temperature, when the target blowing temperature is lower than a threshold value, or when an outside air temperature is higher than a threshold value, the target blowing temperature is higher than the target blowing temperature in the normal state. Controlling the air-conditioning unit so as to be the low temperature target blowing temperature on the low temperature side,
In the specific seat state, when the target blowing temperature is higher than the inside air temperature, when the target blowing temperature is higher than a threshold value, or when the outside air temperature is lower than a threshold value, the target blowing temperature is higher than the target blowing temperature in the normal state. The vehicle air conditioner according to claim 1, wherein the air conditioning unit is controlled so as to be a high temperature target blowing temperature on a high temperature side. The air conditioning unit
A cooler (41) provided in the air conditioning case for cooling the blown air;
A heater (42) provided in the air conditioning case for heating the blown air;
Air mixing means (15) for adjusting the air volume ratio between the air passing through the cooler and the air passing through the heater;
The control means includes
The air volume ratio is determined using the determined target blowing temperature in the normal state,
In the case of the normal state, the air mixing means is controlled so that the determined air volume ratio is obtained.
In the specific seat state, when the target blowing temperature is lower than the inside air temperature, when the target blowing temperature is lower than the threshold value, or when the outside air temperature is higher than the threshold value, the air volume ratio in the normal state is exceeded. Controlling the air mixing means so that the ratio of the air passing through the cooler becomes a high low-temperature air volume ratio,
In the specific seat state, when the target blowing temperature is higher than the inside air temperature, when the target blowing temperature is higher than a threshold, or when an outside air temperature is lower than a threshold, the air volume ratio in the normal state is higher than the air volume ratio. The vehicle air conditioner according to claim 2, wherein the air mix means is controlled so that the ratio of the air passing through the heater becomes a high-temperature air volume ratio. Occupant detection means (77) for detecting the presence or absence of an occupant in each seat,
4. The control device according to claim 1, wherein when the control unit determines that an occupant is present only in the specific seat based on a detection result of the occupant detection unit, the control unit performs control in the specific seat state. The vehicle air conditioner described in 1.