JP2009274679A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle can prevent the comfortableness of air conditioning from being impaired and also prevent power generating efficiency on the vehicle side from being impaired. <P>SOLUTION: This air conditioner for a vehicle includes a high-tension battery 38 charged by a generator 37, a heat core 2 for heat-exchanging hot water and air blown into a cabin, an electric heater 22 for heating the hot water, a pump 31 for circulating the hot water to the heater core 2 and the electric heater 22, an air conditioning controller 40 for controlling the electric heater 22, and a vehicle side controller 50 for controlling the generator 37. The air conditioning controller 40 obtains the power WO of the electric heater 22 required for the hot water to reach the target water temperature TWO, and obtains a necessary voltage VO from the required power WO. When the required voltage VO is smaller than the power voltage of the high-tension battery 38, the air conditioning controller requests the vehicle side controller 50 of power generation with the necessary voltage VO. Consequently, the comfortableness of air conditioning is not impaired, and the power generating efficiency on the vehicle side is not impaired. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner mounted on a vehicle having a vehicle battery charged by a generator, and more particularly to control of power supplied to a heating means.

  Conventionally, what is shown to patent document 1 is known as this kind of vehicle air conditioner, for example. That is, in this apparatus, hot water heat exchange means for exchanging heat between hot water as a heat medium and air blown into the passenger compartment, a hot water generator for heating hot water supplied to the hot water heat exchange means, and hot water A hot water heat exchanging means and a hot water circulating means for circulating to the hot water generating device are provided.

The hot water generator is configured to heat water by a heating means such as an electric heater made of a resistance heating element that generates heat by the power supply voltage of the vehicle battery. The hot water type heat exchanging means is a heater core, and is a heat exchanger that heats the air blown into the room with the hot water generated by the hot water generator.
JP 2004-106634 A

  However, for example, in a heating means such as a resistance type electric heater made of a nichrome wire or the like, the relationship between the output W of the electric heater and the power supply voltage V has the characteristic shown in FIG. Due to this characteristic, since the output W is proportional to the square of the power supply voltage V, the output W of the electric heater depends on the power supply voltage V of the vehicle battery. In other words, the output W of the electric heater, that is, the heating capacity W increases as the power supply voltage V increases.

  In other words, in the case where a large amount of heating capacity W is required in the winter season, if the power supply voltage V of the vehicle battery decreases, the heating capacity W cannot be output sufficiently, so that the heating capacity of the heater core falls short. There is.

  In addition, for example, in an electric vehicle vehicle having a generator for charging a vehicle battery of high voltage (about 50 V to 300 V), power is efficiently generated by intermittent control so as not to generate unnecessary power, The power supply voltage V of the vehicle battery fluctuates relatively greatly. Therefore, there is a problem that the heating capacity W of the electric heater depends on the power supply voltage V.

  Therefore, an object of the present invention is to provide a vehicle air conditioner that does not impair the power generation efficiency on the vehicle side without impairing the comfort of air conditioning.

In order to achieve the above object, the following technical means are adopted. That is, in the first aspect of the invention, the hot water type heat exchanging means for exchanging heat between the vehicle battery (38) charged by the generator (37) and the hot water as the heat medium and the air blown into the passenger compartment. (2), heating means (22) for heating the hot water supplied from the vehicle battery (38) and supplied to the hot water heat exchange means (2), and hot water for the hot water heat exchange means (2) A hot water circulation means (31) for circulation to the heating means (22), an air conditioning control means (40) for controlling the heating means (22) based on a target water temperature (TWO) of the hot water, and a vehicle battery (38). In a vehicle air conditioner comprising vehicle-side control means (50) for controlling a generator (37) based on a power supply voltage,
The air-conditioning control means (40) and the vehicle-side control means (50) are electrically connected via the communication line (55), and the air-conditioning control means (40) lacks the power supply voltage of the heating means (22). In this case, a power generation request is made to the vehicle side control means (50).

  According to the present invention, the generator (37) is driven to generate power, and the power supply voltage of the vehicle battery (38) can be increased. As a result, the heating capability of the heating means (22) can be increased. As a result, the comfort of the air conditioning is not impaired, and the power generation efficiency on the vehicle side is not impaired.

  In the invention according to claim 2, the air conditioning control means (40) obtains the required power (WO) of the heating means (22) at which the hot water becomes the target water temperature (TWO), and the required voltage from the required power (WO). (VO) is obtained, and when the required voltage (VO) is smaller than the power supply voltage of the vehicle battery (38), a power generation request is made to the vehicle side control means (50) by the request flag. According to this invention, when the power supply voltage of the heating means (22) is insufficient, the power generator (37) is driven to generate power, and the power supply voltage of the vehicle battery (38) can be increased. Thereby, the heating capability of a warm water type heat exchange means (2) is securable.

  In the invention according to claim 3, the air conditioning control means (40) obtains the required power (WO) of the heating means (22) at which the hot water becomes the target water temperature (TWO), and the required voltage from the required power (WO). (VO) is obtained, and when the necessary voltage (VO) is smaller than the power supply voltage of the vehicle battery (38), a power generation request is made to the vehicle-side control means (50) by the necessary voltage (VO). It is said. According to the present invention, the generator (37) can be driven to increase the power supply voltage of the vehicle battery (38) to the required voltage (VO). Thereby, the heating capability of a warm water type heat exchange means (2) is securable.

In the invention according to claim 4, the vehicle battery (38) charged by the generator (37) and the heating means for heating the air blown into the vehicle interior supplied with power from the vehicle battery (38). (27), air conditioning control means (40) for controlling the heating means (27) based on the target blown air temperature (TAO) with the air blown into the passenger compartment, and the power supply voltage of the vehicle battery (38). A vehicle air conditioner comprising vehicle side control means (50) for controlling the generator (37),
The air-conditioning control means (40) and the vehicle-side control means (50) are electrically connected via the communication line (55), and the air-conditioning control means (40) lacks the power supply voltage of the heating means (27). In this case, a power generation request is made to the vehicle side control means (50).

  According to the present invention, in the heating means (27) for heating air, as in the first aspect, the generator (37) is driven to generate power, and the power supply voltage of the vehicle battery (38) is reduced. Can be raised. As a result, the heating capability of the heating means (22) can be increased. As a result, the comfort of the air conditioning is not impaired, and the power generation efficiency on the vehicle side is not impaired.

  In the invention according to claim 5, the air conditioning control means (40) obtains the required power (WO) of the heating means (27) at which the air blown into the vehicle interior becomes the target blown air temperature (TAO), and the necessity The required voltage (VO) is obtained from the electric power (WO), and when the required voltage (VO) is smaller than the power supply voltage of the vehicle battery (38), a power generation request is made to the vehicle-side control means (50) by the request flag. It is characterized by that. According to the present invention, when the power supply voltage of the heating means (27) is insufficient, the generator (37) is driven to generate power, and the power supply voltage of the vehicle battery (38) can be increased. Thereby, the heating capability of a heating means (27) is securable.

  In the invention described in claim 6, the air conditioning control means (40) obtains the required power (WO) of the heating means (27) at which the air blown into the vehicle interior becomes the target blown air temperature (TAO), and the necessity The required voltage (VO) is obtained from the electric power (WO), and when the required voltage (VO) is smaller than the power supply voltage of the vehicle battery (38), the vehicle-side control means (50) is generated by the required voltage (VO). It is characterized by making a request. According to the present invention, the generator (37) can be driven to increase the power supply voltage of the vehicle battery (38) to the required voltage (VO). Thereby, the heating capability of a heating means (27) is securable.

  In the invention according to claim 7, when the vehicle side control means (50) receives the power generation request from the air conditioning control means (40), the vehicle side control means (50) controls the generator (37) according to the power generation request. It is a feature. According to the present invention, it is possible to ensure the necessary heating capacity of hot water when necessary according to the heating heat load. Thereby, the heating capability of a warm water type heat exchange means (2) or a heating means (27) can be ensured reliably.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.

(First embodiment)
Hereinafter, the vehicle air conditioner in 1st Embodiment of this invention is demonstrated based on FIG. 1 thru | or FIG. FIG. 1 is a schematic diagram showing an overall configuration of a vehicle air conditioner. FIG. 2 is a flowchart showing control of a power generation request in the air conditioning control device. FIG. 3 is a flowchart showing control of the electric heater in the air conditioning control device.

  The vehicle air conditioner of the present embodiment is applied to a vehicle having a generator that charges a high-voltage (about 50 V to 300 V) vehicle battery, such as an electric vehicle. As shown in FIG. 1, the vehicle air conditioner circulates the air conditioning unit 1 that houses the heater core 2, which is a hot water heat exchanger, the hot water generator 20 that heats the hot water, and the hot water to the heater core 2 and the hot water generator 20. The circuit includes a circulation circuit 30, a power supply device 35 that supplies power to the hot water generator 20, an air conditioning control device (ECU) 40 that is air conditioning control means, and a vehicle side control device 50 that is vehicle control means.

  The air conditioning unit 1 is disposed from the substantially central portion in the left-right direction of the vehicle to the passenger seat side below the instrument panel at the front of the interior of the automobile. The ventilation system of the air conditioning unit 1 according to the present embodiment is roughly divided into two parts: a blower 8 and an air conditioning duct 3.

  The blower 8 is arranged on the upstream side of the air flow of the air conditioning duct 3 and includes a blower 8a and a blower motor 8b. The blower 8 is a blowing unit that generates an air flow toward the passenger compartment in the air conditioning duct 3. The blower motor 8 b is controlled by the air conditioning control device 40. On the suction side of the blower 8, there is provided an inside / outside air switching box 9 for switching either air in the vehicle interior (inside air) or outside air (outside air) led to the blower 8.

  The inside / outside air switching box 9 is provided with an inside / outside air switching door 9a, and this inside / outside air switching door 9a is driven by an actuator such as a servo motor to change the opening degree of the inside air introduction port and the outside air introduction port. A suction port switching means.

  The air-conditioning duct 3 is a duct means that constitutes a passage for air that is blown out into the vehicle interior, and an evaporator 4 that cools the air that is blown out into the vehicle interior is disposed upstream of the air flow of the air-conditioning duct 3. . The evaporator 4 is a low-pressure side heat exchanger of a vapor compression refrigerator that moves low-temperature heat to a high-temperature side. The vapor compression refrigerator includes a compressor 5, a radiator 6 that cools the high-temperature and high-pressure refrigerant discharged from the compressor 5, a decompressor 7 that decompresses and expands the high-pressure refrigerant cooled by the radiator 6, and the like. In this embodiment, the compressor 5 is driven by an electric motor.

  A heater core 2 is provided on the downstream side of the air flow of the evaporator 4. The heater core 2 is a heat exchanger for heating that heats the air that has passed through the evaporator 4 by exchanging heat with warm water. In the heater core 2 of the present embodiment, the hot water heated by the hot water generator 20 is circulated.

  An air mix door 10 that adjusts the mixing ratio of the cool air that flows through the heater core 2 and the cool air that flows through the heater core 2 and the warm air that flows through the heater core 2 circulates upstream of the air flow in the heater core 2. It is arranged freely. The air mix door 10 is a blow temperature adjusting means that is driven by an actuator such as a servo motor and adjusts the blow temperature of the conditioned air blown into the vehicle interior.

  Next, the hot water generator 20 will be described. The hot water generator 20 includes an electric heater 22 that is a heating means and a pipe 21 through which hot water flows. Of the pipe 21 through which the hot water flows, an electric heater 22 such as a sheathed heater is placed in contact with the outer wall surface at a portion bent in a substantially U shape so that the upper side is convex. The pipe 21 and the electric heater 22 are integrated in a state of being embedded in a metal having high thermal conductivity such as aluminum.

  The protective casing 23 is a cover that covers the electric heater 22 and protects the electric heater 22 and the pipe 10. On the inner wall side of the protective casing 23, a heat insulating material such as resin or glass wool is provided.

  The circulation circuit 30 is formed so as to extend the pipe 21 and connect the hot water generator 20 and the heater core 2. The circulation circuit 30 is provided with a pump 31 and a reserve tank 32 which are hot water circulation means. The pump 31 is an electric pump that circulates hot water, and circulates hot water flowing in the pipe 21 from the hot water generator 20 to the heater core 2. The reserve tank 32 absorbs fluctuations in the amount of hot water circulating in the circulation circuit 30 and is disposed between the pump 31 and the heater core 2.

  The circulation circuit 30 is provided with a heating protection temperature sensor 24 and a water temperature sensor 25. The heat protection temperature sensor 24 detects the wall surface temperature of the pipe 21 on the side of the hot water outlet 21a of the portion of the pipe 21 that is heated by the electric heater 22, so that the hot water temperature on the hot water outlet 21a side, This constitutes temperature detecting means for detecting a temperature that rises and changes in response to a rise in the heat generation temperature of the electric heater 22.

  The water temperature sensor 25 detects the temperature of the hot water indirectly by detecting the wall surface temperature of the pipe 21 at the hot water inlet 2 a of the heater core 2 in the pipe 21, similarly to the heat protection temperature sensor 24. The water temperature sensor 25 detects the temperature of the hot water on the downstream side of the hot water flow from the heating protection temperature sensor 24.

  The power supply device 35 includes a power amplifier 36, a generator 37, and a high-voltage battery 38 that is a vehicle battery. The power amplifier 36, the high-voltage battery 38, the high-voltage battery 38, and the generator 37 are each supplied with power. They are electrically connected by a supply line 54. The power amplifier 36 is a voltage amplifier, and is connected so as to supply electric power to the electric heater 22 and is controlled so as to be controlled by the air conditioning control device 40.

  The generator 37 is power generation means for charging the high voltage battery 38 to a high voltage (for example, about 50 V to 300 V), and is controlled by the vehicle side control device 50. The high voltage battery 38 is a storage battery having the above high voltage power supply voltage V for supplying power to various electrical components mounted on the vehicle.

  The power supply device 35 is provided with a voltage sensor 39 for detecting the power supply voltage V of the high voltage battery 38. The voltage information detected by the voltage sensor 39 is electrically connected so as to be input to the vehicle-side control device 50. The vehicle-side control device 50 controls the driving of the generator 37 according to the voltage information detected by the voltage sensor 39.

  The air conditioning control device 40 inputs temperature information detected by the heating protection temperature sensor 24 and the water temperature sensor 25 and controls electrical equipment for air conditioning such as the power amplifier 36 and the pump 31. The air conditioning control device 40 and the vehicle side control device 50 are electrically connected by a communication line 55. For example, the voltage information of the high-voltage battery 38 detected by the voltage sensor 39 is transmitted from the vehicle-side control device 50 to the air-conditioning control device 40 via the communication line 55. Further, the air-conditioning control device 40 further transmits the vehicle-side control device. 50 is instructed to generate power.

  By the way, in the air-conditioning control apparatus 40 of this embodiment, when driving the electric heater 22, the power supply voltage V of the high voltage battery 38 is monitored, and when the power supply voltage V is insufficient, the power supply voltage V is increased. So that it is controlled. Therefore, the power generation request control program shown in FIG. 2 is provided. The characteristic operation of this embodiment will be described based on the flowchart shown in FIG.

  When the start (or heating) switch of the air conditioner is turned on, input processing is performed in step S110. Here, the voltage information of the high voltage battery 38 detected by the voltage sensor 39 is read. Specifically, voltage information of the high voltage battery 38 transmitted from the vehicle control device 50 to the air conditioning control device 40, that is, the power supply voltage V is read.

In step S120, the required power WO of the electric heater 22 is calculated. Specifically, the required power (target heating capacity) WO at which the water temperature detected by the water temperature sensor 25 becomes the target temperature TWO is calculated. In step S130, the required voltage VO of the electric heater 22 is calculated. For example, in a resistance type electric heater 22 such as a nichrome wire, the relationship between the output W of the electric heater 22 and the power supply voltage V is W = V ² / R (see FIG. 6). In this equation, R is the resistance of the nichrome wire.

Therefore, the required voltage VO = √WO × R is calculated from W = V ² / R. In step S140, the power supply voltage V of the high voltage battery 38 read in step S110 is compared with the required voltage VO calculated from the required power WO. Here, if the power supply voltage V is equal to or greater than the required voltage VO, the process bypasses step S150 and returns to step S110.

  Here, if the power supply voltage V is smaller than the required voltage VO, that is, if the power supply voltage V is insufficient, the control process of step S150 is executed. Step S150 is control for requesting the vehicle-side control device 50 to generate power at the required voltage VO. The vehicle-side control device 50 that has received the power generation request drives the generator 37 to generate power so that the power supply voltage V of the high voltage battery 38 becomes the required voltage VO.

  As a result, the power supply voltage V of the high voltage battery 38 rises to the required voltage VO, and as a result, the heating capability of the electric heater 22 can be ensured. That is, priority can be given to ensuring the heating function. Therefore, the power generation efficiency on the vehicle side can be kept intact.

  Here, the characteristic operation of the electric heater 22 will be described based on the flowchart shown in FIG. First, when the start (or heating) switch of the air conditioner is turned on, the control process for the operation of the electric heater 22 is started and the pump 31 is driven. By driving the pump 31, the water in the circulation circuit 30 is circulated between the heater core 2 and the hot water generator 20.

  In step S210, input processing is performed. Here, the temperature TW of the hot water detected by the water temperature sensor 25 is read. In step S220, the target water temperature TWO is calculated. The target water temperature TWO is the temperature of the hot water flowing into the heater core 2 and is calculated based on the required heating capacity of the heater core 2 separately.

  The required heating capacity of the heater core 2 is calculated based on the target blown air temperature TAO blown out from the air conditioning duct 3. Further, the target blown air temperature TAO is calculated based on the air conditioning heat load (or heating heat load) of the vehicle.

In steps S230 and S240, a required capacity (target heating capacity) WO at which the temperature TW of the hot water detected by the water temperature sensor 25 becomes the target water temperature TWO is calculated. Then, as described above, the required voltage VO = √WO × R is calculated from W = V ² / R as the output value (VO (n)) of the electric heater 22. More specifically, in step S230, E (n) = TW−TWO is calculated, and in step S240, an output value “VO (n) = VO (n−1) + K ( E (n) −E (n−1) + Θ / T × E (n)) ”is calculated.

  In this calculation formula, VO (n−1) is the output value to the previous electric heater, K is a proportional constant, E (n−1) is the previous E (n) value, T is an integral constant, and Θ is a sampling. It is a period. Thereby, the electric heater 22 can be controlled by feedback control.

  In step S250, the output value (VO (n)) is transmitted to the power amplifier 36. In the power amplifier 36, the output value (VO (n)) is applied to the electric heater 22. By performing such feedback control, the required voltage VO can be applied to the electric heater 22. That is, according to the heating heat load, it is possible to ensure the necessary heating capacity of hot water when necessary. Thereby, the comfort of heating of an air conditioner is not impaired.

(Second Embodiment)
In the first embodiment described above, the control process for making a power generation request to the vehicle side control device 50 at the required voltage VO is executed in step S150. However, the control process for making a power generation request to the vehicle side control device 50 by the request flag is performed. It may be executed. FIG. 4 is a flowchart showing the control of the power generation request of the air conditioning control device in the present embodiment.

  In step S150a of this embodiment, it is control which makes the electric power generation request | requirement to the vehicle side control apparatus 50 with a request flag. The vehicle-side control device 50 that has received the power generation request continues the power generation of the generator 37 while it continues to receive the power generation request. When a sufficient power supply voltage is obtained, the power generation request is canceled and normal power generation is performed.

  As a result, the power supply voltage V of the high voltage battery 38 rises to the required voltage VO, and as a result, the heating capability of the electric heater 22 can be ensured. That is, priority can be given to ensuring the heating function. Therefore, the power generation efficiency on the vehicle side can be kept intact.

(Third embodiment)
In the above embodiment, the configuration is such that the hot water flowing into the heater core 2 is heated using the electric heater 22 that is the heating means, but the air that is blown into the air conditioning duct 3 using the electric heater 27 that is the heating means. You may comprise so that it may heat.

  FIG. 5 is a schematic diagram showing the overall configuration of the vehicle air conditioner in the present embodiment. In the vehicle air conditioner of the present embodiment, as shown in FIG. 5, an electric heater 27 is arranged instead of the heater core 2. Thereby, it is comprised so that the air which passed the electric heater 27 may be heated.

  For example, the electric heater 22 includes an electric heater main body 27a and a heat exchange unit 27b. The electric heater body 27a is composed of a resistance-type heat generating part such as a sheathed heater. And the heat exchange part 27b which consists of a some plate-shaped fin is integrally provided in the outline of the heat generating part. Air that is blown into the air conditioning duct 3 is heated by the heated heat exchanging portion 27b.

  The electric heater 27 is connected to the high voltage battery 38 via the power amplifier 36 as in the above embodiment. Here, the required heating capacity of the electric heater 27 of the present embodiment is calculated based on the target blown air temperature TAO blown out from the air conditioning duct 3. Therefore, the required power VO is obtained from the required heating capacity. That is, required heating capacity = required power VO.

  According to the vehicle air conditioner configured as described above, since the hot water generating device 20 and the circulation circuit 30 are not provided, it is possible to form a heating device that is less expensive to manufacture than the hot water heat exchange means.

(Other embodiments)
In the above embodiment, although it applied to the air conditioning apparatus which has arrange | positioned the evaporator 4 and the heater core 2 in the air conditioning duct 3, you may make it apply to the heating apparatus which arrange | positions only the heater core 2 in the air conditioning duct 3. FIG.

  Moreover, in the above embodiment, although the vehicle air conditioner of this invention was applied to the vehicle which has the generator which charges the battery for vehicles about high voltages (for example, 50V-300V), such as an electric vehicle, Not limited to this, the present invention may be applied to a vehicle equipped with an air-cooled engine.

It is a schematic diagram which shows the whole structure of the vehicle air conditioner in 1st Embodiment. It is a flowchart which shows control of the electric power generation request | requirement of the air-conditioning control apparatus in 1st Embodiment. It is a flowchart which shows control of the electric heater in 1st Embodiment. It is a flowchart which shows control of the electric power generation request | requirement of the air-conditioning control apparatus in 2nd Embodiment. It is a schematic diagram which shows the whole structure of the vehicle air conditioner in 3rd Embodiment. It is a characteristic view which shows the relationship between the output W of an electric heater, and the power supply voltage V. FIG.

Explanation of symbols

2. Heater core (hot water heat exchange means)
22 ... Electric heater (heating means)
27 ... Electric heater (heating means)
31 ... Pump (warm water circulation means)
37 ... Generator 38 ... High-voltage battery (vehicle battery)
40. Air conditioning control device (air conditioning control means)
50. Vehicle-side control device (vehicle-side control means)
55 ... Communication line TAO ... Target blown air temperature TWO ... Target water temperature VO ... Required voltage WO ... Required power

Claims (7)

A vehicle battery (38) charged by a generator (37);
A hot water type heat exchanging means (2) for exchanging heat between the hot water as the heat medium and the air blown into the passenger compartment;
Heating means (22) for heating hot water supplied with power from the vehicle battery (38) and supplied to the hot water heat exchange means (2);
A hot water circulation means (31) for circulating the warm water to the hot water heat exchange means (2) and the heating means (22);
An air conditioning control means (40) for controlling the heating means (22) based on the target water temperature (TWO) of the hot water;
In a vehicle air conditioner comprising vehicle-side control means (50) for controlling the generator (37) based on a power supply voltage of the vehicle battery (38),
The air conditioning control means (40) and the vehicle side control means (50) are electrically connected via a communication line (55),
The vehicle air conditioner is characterized in that the air conditioning control means (40) makes a power generation request to the vehicle side control means (50) when the power supply voltage of the heating means (22) is insufficient.   The air conditioning control means (40) obtains the necessary power (WO) of the heating means (22) at which the hot water becomes the target water temperature (TWO), and obtains the necessary voltage (VO) from the necessary power (WO), The power generation request is made to the vehicle-side control means (50) by a request flag when the required voltage (VO) is smaller than a power supply voltage of the vehicle battery (38). Vehicle air conditioner.   The air conditioning control means (40) obtains the necessary power (WO) of the heating means (22) at which the hot water becomes the target water temperature (TWO), and obtains the necessary voltage (VO) from the necessary power (WO), When the required voltage (VO) is smaller than a power supply voltage of the vehicle battery (38), a power generation request is made to the vehicle-side control means (50) by the required voltage (VO). Item 2. The vehicle air conditioner according to Item 1. A vehicle battery (38) charged by a generator (37);
A heating means (27) for supplying air from the vehicle battery (38) and heating air blown into the vehicle interior;
Air conditioning control means (40) for controlling the heating means (27) based on the target blown air temperature (TAO) with the air blown into the passenger compartment;
In a vehicle air conditioner comprising vehicle-side control means (50) for controlling the generator (37) based on a power supply voltage of the vehicle battery (38),
The air conditioning control means (40) and the vehicle side control means (50) are electrically connected via a communication line (55),
The vehicle air conditioner is characterized in that the air conditioning control means (40) makes a power generation request to the vehicle side control means (50) when the power supply voltage of the heating means (27) is insufficient.   The air conditioning control means (40) obtains the required power (WO) of the heating means (27) at which the air blown into the vehicle interior reaches the target blown air temperature (TAO), and from the required power (WO) A required voltage (VO) is obtained, and when the required voltage (VO) is smaller than the power supply voltage of the vehicle battery (38), a power generation request is made to the vehicle-side control means (50) by a request flag. The vehicle air conditioner according to claim 4, wherein   The air conditioning control means (40) obtains the required power (WO) of the heating means (27) at which the air blown into the vehicle interior reaches the target blown air temperature (TAO), and from the required power (WO) A required voltage (VO) is obtained, and when the required voltage (VO) is smaller than the power supply voltage of the vehicle battery (38), a power generation request is made to the vehicle-side control means (50) by the required voltage (VO). The vehicle air conditioner according to claim 4, wherein:   The said vehicle side control means (50) controls the said generator (37) according to the electric power generation request | requirement, when the electric power generation request | requirement from the said air-conditioning control means (40) is received. The vehicle air conditioner according to any one of claims 6 to 6.

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