JP5941679B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner.

  Conventionally, for example, when performing a cold storage mode in which the amount of condensed water stored in the evaporator is increased during operation of the vehicle engine, and when the vehicle engine is stopped, the cooling mode in which the air is cooled by cooling the amount of stored water in the evaporator condensed water An air conditioner that switches the temperature measurement responsiveness of the temperature sensor by switching the time constant of the temperature sensor that detects the outlet temperature of the evaporator is known (for example, see Patent Document 1).

In this air conditioner, since the variation in the outlet temperature of the evaporator is larger in the cooling mode than in the cool storage mode, the outlet temperature of the evaporator is reduced in the cooling mode by reducing the time constant of the temperature sensor. It responds quickly to rapid changes in the temperature and suppresses the control delay of the indoor outlet temperature.
On the other hand, in the cool storage mode where the fluctuation of the outlet temperature of the evaporator is small, the response to changes in the actual outlet temperature of the evaporator is delayed by increasing the time constant of the temperature sensor, thereby increasing the number of intermittent compressors. It suppresses and improves the durability of electromagnetic clutches.

JP 2008-81121 A

By the way, in the air conditioner according to the above prior art, the opening degree of the damper capable of changing the air volume introduced into the heater core is calculated based on the blowing air temperature of the evaporator, the hot water temperature of the heater core, and the target blowing air temperature. Has been.
In addition, although the time constant of the temperature sensor that is switched between when the vehicle engine is operating and when the vehicle engine is stopped is reflected in the blown air temperature of the evaporator, the hot water temperature of the heater core is only detected by an appropriate sensor.

For this reason, for example, in a vehicle equipped with a sensor for detecting the warm water temperature of the heater core not on the heater core side but on the internal combustion engine side, when the internal combustion engine is operated, the sensor detection result can be regarded as being equal to the actual hot water temperature of the heater core. Even at the time of idling stop, the sensor detection result and the actual hot water temperature of the heater core may be greatly different.
In this case, if the detection result of the sensor that is greatly different from the actual hot water temperature of the heater core is used, there arises a problem that the temperature of blowing air from the air conditioner to the vehicle interior cannot be controlled appropriately.
In contrast to the occurrence of such a problem, for example, when a new sensor for directly detecting the hot water temperature of the heater core (that is, in the vicinity of the heater core) is newly provided, there is a problem that the cost required for the device configuration increases. Arise.

  The present invention has been made in view of the above circumstances, and provides a vehicle air conditioner capable of appropriately controlling the temperature of blowing air into the vehicle compartment while preventing an increase in the cost required for the device configuration. It is an object.

In order to solve the above problems and achieve the object, a vehicle air conditioner according to claim 1 of the present invention (for example, the vehicle air conditioner 10 in the embodiment) is an evaporator (for example, in the embodiment). An evaporator 14), a heater core (for example, the heater core 16 in the embodiment) and an air conditioner main body (for example, the air conditioner main body 10a in the embodiment), and an internal combustion engine (for example, the embodiment) mounted on a vehicle. the cooling water warmed by the engine 11) and water to the heater core in the by warming the heater core by the cooling water, a said cooling water in air conditioning system as a heat source of the air conditioner, the An evaporator sensor that detects the temperature of air that has passed through the evaporator (for example, the evaporator sensor 19 in the embodiment) and the inside of the internal combustion engine. The engine water temperature sensor (for example, the engine water temperature sensor 20 in the embodiment) that detects the temperature of the cooling water to be used and the air volume acquisition means (for example, the control device 18 in the embodiment) that acquires the air volume that passes through the heater core serve as the same. ), A damper capable of changing the air volume introduced into the heater core after passing through the evaporator (for example, the damper 15 in the embodiment), the outlet air temperature of the evaporator, and the outlet air temperature of the heater core. And a control means (for example, the control device 18 in the embodiment) for controlling the opening degree of the damper so that the temperature of the air blown from the air conditioner body matches the target air temperature. The means compares the time constant for the detection result output from the evaporator sensor with a time constant compared to the time constant during operation of the internal combustion engine. The time constant at the time of idling stop is changed so as to be smaller, and the outlet air temperature of the evaporator is obtained at the time of operation of the internal combustion engine and at the time of idling stop, respectively. The outlet air temperature of the heater core is obtained based on the detection result of the water temperature sensor, the obtained outlet air temperature of the evaporator, and the air volume acquired by the air volume acquisition means.

ｎ：任意の自然数
Ｔｈ（ｎ）：ヒータコアの出口空気温度の今回値
Ｔｃｗ：コア内部温度
Ｔｈ（ｎ−１）：ヒータコアの出口空気温度の前回値
δ： 係数
Ｔｅ：エバポレータの出口空気温度
Ｆ×ＳＷ／１００：ヒータコアを通過する風量 Furthermore, in the vehicle air conditioner according to claim 2 of the present invention, the outlet air temperature of the heater core during the idling stop is obtained by the following equation (4).

n: Any natural number
Th (n): Current value of the heater core outlet air temperature
Tcw: Core internal temperature
Th (n-1): Previous value of the outlet air temperature of the heater core
δ: coefficient
Te: Evaporator outlet air temperature
F x SW / 100: Air volume passing through the heater core

Furthermore, in the vehicular air conditioning apparatus according to claim 3 of the present invention, the control means, the detection result to the correction value corresponding outlet air temperature of the evaporator output from the evaporator sensor (e.g., in the embodiment The first correction amount C1 and the second correction amount C2) correct the detection result of the outlet air temperature of the evaporator .

Furthermore, the vehicle air conditioner according to claim 4 of the present invention includes a blower that blows air toward the evaporator and the heater core (for example, the blower 13 in the embodiment), and more than the heater core in the blowing direction of the blower. A damper (e.g., damper 15 in the embodiment) provided on the upstream side and capable of changing the amount of air introduced into the heater core out of the amount of air blown by the airflow, for example, the damper 15 in the embodiment; Based on the driving voltage (for example, fan voltage V in the embodiment) and the opening degree of the damper, the amount of air passing through the heater core is acquired.

According to the vehicle air conditioner of the first aspect of the present invention, the time constant for the parameter related to the blowing temperature of the air blown from the air conditioner main body to the vehicle interior is changed at the time of idling stop and the operation of the internal combustion engine. For this reason, for example, even when the change in the blowing temperature of the air blown into the passenger compartment increases during idle stop, the change in the blowing temperature can be appropriately controlled with high accuracy.
As a result, for example, even during idling stop, it is possible to execute various types of control to suppress the change in the blowing temperature by matching the blowing temperature with an appropriate target temperature. Desired comfort can be easily ensured.

  Moreover, for example, it is possible to accurately and appropriately control the change in the temperature of blowing air into the passenger compartment with the existing device configuration without the need to add a new temperature sensor, etc., and the cost required for the device configuration increases. Can be prevented.

Further, according to the vehicle air conditioner of the first aspect of the present invention, for example, during the operation of the internal combustion engine, various controls are executed at an excessive frequency with respect to the temperature of blowing air into the vehicle interior. This can be prevented.
In addition, for example, when idling is stopped, it is possible to appropriately and accurately control the change in the blowing temperature of the air blown into the passenger compartment, and execute various controls at appropriate timings to suppress the change in the blowing temperature. Therefore, desired comfort in the passenger compartment can be easily ensured.

Furthermore, according to the vehicle air conditioner of claim 3 of the present invention, according to a correction value corresponding to the detection result of the outlet air temperature of the evaporator, for example, the amount of change in the outlet air temperature or the outlet air temperature per unit time. By correcting the detection result of the temperature sensor with the correction value, the outlet air temperature of the evaporator can be detected with high accuracy.
As a result, it is possible to accurately and appropriately control the change in the blowing temperature of the air blown into the vehicle interior, and it is possible to execute various controls that suppress the change in the blowing temperature at appropriate timing. The desired comfort in the room can be easily ensured.

Furthermore, according to the vehicle air conditioner of claim 4 of the present invention, the air volume accuracy is improved by acquiring the air volume passing through the heater core based on the drive voltage of the blower and the opening degree of the damper. Can do.

It is a block diagram of the vehicle air conditioner which concerns on embodiment of this invention. The figure which shows an example of the correspondence of the variation | change_quantity per unit time (Teva (0.5s) variation | change_quantity) of the time weighted average value Teva (0.5s) which concerns on embodiment of this invention, and 1st correction amount C1. It is. It is a figure which shows an example of the correspondence of time weighted average value Teva (0.5 s) and 2nd correction amount C2 which concerns on embodiment of this invention. The relationship between the change of the operation (ON) and the operation stop (OFF) of the compressor according to the embodiment of the present invention, the detection result (detected value) of the evaporator sensor, and the actual outlet air temperature (actual temperature) of the evaporator It is a figure which shows an example. It is a figure which shows an example of the change of the actual vehicle air volume F according to the drive voltage (fan voltage) V of the air blower which concerns on embodiment of this invention. It is a figure which shows an example of the correspondence of the detection result (engine water temperature) output from an engine water temperature sensor and the core internal water temperature Tcw at the time of idling stop and operation of the internal combustion engine according to the embodiment of the present invention. . It is a figure which shows the example of each change of the heater core exit air temperature Th, the evaporator exit air temperature Te, and the blowing temperature in the Example and comparative example which concern on embodiment of this invention at the time of vehicle travel and vehicle stop.

Hereinafter, a vehicle air conditioner according to an embodiment of the present invention will be described with reference to the accompanying drawings.
For example, as shown in FIG. 1, the vehicle air conditioner 10 according to the present embodiment is mounted on a vehicle (not shown) that travels by the driving force output from the internal combustion engine 11, and is upstream of the ventilation duct 12. The air blower 13, the evaporator 14, the damper 15, and the heater core 16 are sequentially provided from the air inlet 12 a provided to the air outlet 12 b provided on the downstream side.
Furthermore, the vehicle air conditioner 10 includes a refrigeration cycle 17 connected to the evaporator 14, a control device 18, an evaporator sensor 19, and an engine water temperature sensor 20.

The air introduction port 12a of the ventilation duct 12 is provided so that inside air (vehicle compartment air) and outside air (vehicle compartment outside air) can be introduced into the air conditioner main body 10a.
The air outlet 12b of the ventilation duct 12 is provided so that air can be blown from the air conditioner body 10a into the vehicle interior.

  The blower 13 is driven in accordance with, for example, a drive voltage (fan voltage) V applied under the control of the control device 18, and air (inside air and outside air) introduced from the air inlet 12 a is downstream from the upstream side of the ventilation duct 12. The air is directed toward the air outlet 12b on the side, that is, toward the evaporator 14 and the heater core 16.

The evaporator 14 is connected to 17 in the refrigeration cycle.
The refrigeration cycle 17 includes a compressor 31, a condenser 32, a condenser fan 33, a receiver 34, and an expansion valve 35 that are mechanically coupled to the internal combustion engine 11 through an electromagnetic clutch (not shown). It is prepared for.

The compressor 31 is driven by the driving force output from the internal combustion engine 11, sucks the refrigerant from the evaporator 14, compresses the refrigerant, and discharges it to the condenser 32.
The condenser 32 cools the refrigerant flowing into the condenser 32 by blowing air from the condenser fan 33.
The receiver 34 separates the gas-liquid refrigerant flowing out of the condenser 32 and flowing into the receiver.
The expansion valve 35 decompresses the liquid refrigerant flowing out from the receiver 34 to a low pressure, forms a low-pressure gas-liquid two-phase state, and discharges the low-pressure refrigerant to the evaporator 14.
The evaporator 14 cools the air in the ventilation duct 12 by heat absorption when the low-pressure refrigerant flowing into the evaporator evaporates.

  The evaporator sensor 19 is disposed at a position downstream of the evaporator 14 in the ventilation duct 12, detects the temperature of the air that has passed through the evaporator 14 (evaporator outlet air temperature Te), and signals the detection result to the control device 18. Output.

  The damper 15 can be rotated by, for example, a motor M that is driven by the control of the control device 18, and the amount of air introduced into the heater core 16 out of the amount of air that has passed through the evaporator 14 by the blower of the blower 13 and the heater core 16. The air volume ratio with the bypass air volume is adjusted by the opening (for example, the opening with respect to the ventilation path toward the heater core 16).

  The heater core 16 uses the cooling water heated by cooling the internal combustion engine 11 as a heat source, and in the ventilation path toward the heater core 16 in the ventilation duct 12 by heat radiation of the cooling water flowing out from the internal combustion engine 11 and flowing into the interior. Heat the air.

  The engine water temperature sensor 20 detects the temperature of the cooling water flowing through the internal combustion engine 11 (engine water temperature Tw), and outputs a signal of this detection result to the control device 18.

  The control device 18 changes the time constant for a parameter related to the temperature of air blown from the air conditioner body 10a into the vehicle compartment when the internal combustion engine 11 is temporarily stopped and when the internal combustion engine 11 is operating. For example, the time constant during idling stop is made smaller than the time constant during operation of the internal combustion engine 11.

  For example, when the internal combustion engine 11 is operating, the control device 18 sets a first time constant τ1 (for example, 30 seconds) for the detection result output from the evaporator sensor 19, and this first time constant τ1. The evaporator outlet air temperature Te (for example, Te = Teva (for example, Te = Teva (for example, 30-second time-weighted average value Teva (30 s)) is output according to the average value of the plurality of detection results sequentially output from the evaporator sensor 19 over a period of time. 30 s) + predetermined constant T etc.).

  For example, the control device 18 sets a second time constant τ2 (for example, 0.5 seconds) for the detection result output from the evaporator sensor 19 when the internal combustion engine 11 is in an idling stop. Depending on the average value of a plurality of detection results sequentially output from the evaporator sensor 19 over the second time constant τ2 (for example, the time-weighted average value Teva (0.5 s) for 0.5 seconds), for example, the following formula The evaporator outlet air temperature Te described as shown in (1) is calculated.

  As shown in the above formula (1), when the internal combustion engine 11 is in an idling stop, the control device 18 corrects a correction value (for example, the first correction amount C1 and the correction value corresponding to the detection result output from the evaporator sensor 19). The detection result output from the evaporator sensor 19 is corrected by the second correction amount C2 or the like.

For example, as shown in the following formula (2) and FIG. 2, the control device 18 changes the amount of change per unit time of the time weighted average value Teva (0.5 s) according to the detection result output from the evaporator sensor 19 ( As Teva (0.5 s change amount) increases, the change tends to increase, and the change amount per unit time of the time-weighted average value Teva (0.5 s) (Teva (0.5 s) change amount) The first correction amount C1 is set to zero when is zero.
The following mathematical formula (2) is described by a predetermined coefficient α.

Further, for example, as shown in the following formula (3) and FIG. 3, the control device 18 has a time weighted average value Teva (0.5 s) corresponding to the detection result output from the evaporator sensor 19 larger than zero. A second correction amount C2 is set that changes in a decreasing trend from the predetermined value C2a toward zero as it increases in a predetermined temperature range (for example, the temperature range of the first temperature T1 to the second temperature T2).
The following mathematical formula (3) is described by predetermined coefficients β and γ.

  The second correction amount C2 is, for example, a predetermined value C2a when the time weighted average value Teva (0.5 s) is not less than zero and not more than the first temperature T1, and the time weighted average value Teva (0.5 s) is the second value. It is zero at temperature T2 or higher.

  That is, since the temperature change of the evaporator 14 becomes larger at the time of idling stop when the internal combustion engine 11 and the compressor 31 are stopped than when the internal combustion engine 11 and the compressor 31 are operated, the control device 18 responds to the detection result of the evaporator sensor 19. By reducing the time constant from the first time constant τ 1 to the second time constant τ 2, the calculation result of the evaporator outlet air temperature Te follows the fast temperature change of the evaporator 14 with good response.

  Furthermore, the control device 18 corrects the amount of change per unit time of the detection result of the evaporator sensor 19 and the detection result of the evaporator sensor 19 so that the operation (ON) of the compressor 31 as shown in FIG. The detection result (detection value) of the evaporator sensor 19 according to the change in the operation stop (OFF), that is, the operation stop (OFF) of the compressor 31 from time t1 to time t2 and the operation (ON) of the compressor 31 after time t2. ) And the actual temperature (actual temperature), the calculation result of the evaporator outlet air temperature Te is made to coincide with the actual temperature with high accuracy.

Note that the control device 18 continues the processing at the idle stop until the predetermined condition is satisfied at the time of switching from the idle stop to the operation of the internal combustion engine 11, for example, using the above formula (1). The calculation of the evaporator outlet air temperature Te may be continued.
This predetermined condition is, for example, that the control of circulating the refrigerant in the refrigeration cycle 17 is started by the start of the operation of the compressor 31, and the average value by the first time constant τ1 (for example, the time weighted average value Teva (30 seconds). 30 s)) is less than the average value by the second time constant τ 2 (for example, the time weighted average value Teva (0.5 s) for 0.5 seconds).

  Further, the control device 18 changes the internal combustion engine 11 to the heater core 16 based on detection results output from the engine water temperature sensor 20 when the internal combustion engine 11 is temporarily stopped and when the internal combustion engine 11 is operating. The calculation of the water temperature of the sent cooling water, that is, the water temperature of the cooling water inside the heater core 16 (core internal water temperature) Tcw is switched.

For example, when the internal combustion engine 11 is in operation, the control device 18 sets the detection result output from the engine water temperature sensor 20 to be equal to the core internal water temperature Tcw (Tw = Tcw).
The core internal water temperature Tcw is approximately equal to the temperature of the air that has passed through the heater core 16 (heater core outlet air temperature Th) (Th≈Tcw).

Further, for example, when the internal combustion engine 11 is in an idling stop, the control device 18 is based on the amount of air passing through the heater core 16 (= F × SW / 100) and the detection result of the evaporator sensor 19, for example, the above formula (1) For example, the core internal water temperature Tcw described as shown in the following mathematical formula (4) is calculated based on the evaporator outlet air temperature Te described as follows.
In the following mathematical formula (4), the control device 18 sets the core internal water temperature Tcw to be approximately equal to the temperature of the air that has passed through the heater core 16 (heater core outlet air temperature Th) (Th≈Tcw).
Further, in the following formula (4), the heater core outlet air temperature Th (n), which is the current value by an arbitrary natural number n, is described by the previous value Th (n-1) and a predetermined coefficient δ, and n = Th (0) at 1 is assumed to be equal to the core internal water temperature Tcw at the start of idling stop.

  Further, the control device 18 uses the air volume (= F × SW / 100) in the above formula (4) as the actual vehicle air volume (that is, the blower) according to the drive voltage (fan voltage) V of the blower 13 as shown in FIG. 13 is calculated on the basis of the air volume (F) of air introduced from the air inlet 12a by F 13 and the opening degree of the damper 15 according to the mixing ratio SW.

  For example, in FIG. 5, the actual vehicle air volume F is set so as to change in an increasing trend as the drive voltage (fan voltage) V of the blower 13 increases.

Further, the mixing ratio SW in the above formula (4) is, for example, as shown in the following formula (5), the target exhalation temperature Tao that is a target value for the blowing temperature of air blown from the air conditioner body 10a to the vehicle interior, and the previous value The heater core outlet air temperature Th (n-1) and the evaporator outlet air temperature Te are described as shown in the following formula (5), for example.
The target exhalation temperature Tao is set in accordance with, for example, an input operation by a vehicle occupant.

  That is, for example, as shown in FIG. 6, the control device 18 detects the detection result output from the engine water temperature sensor 20 and the core internal water temperature Tcw when the internal combustion engine 11 is stopped at an idle stop as compared to when the internal combustion engine 11 is operated. Therefore, the calculation result of the evaporator outlet air temperature Te in which the time constant has been changed and corrected for the detection result of the evaporator sensor 19, and the amount of air passing through the heater core 16 (= F × SW / 100) Based on this, the calculation accuracy is improved by calculating the core internal water temperature Tcw.

  Then, the control device 18 adjusts the opening degree of the damper 15 so as to make the blowing temperature coincide with the target discharge temperature Tao based on the evaporator outlet air temperature Te and the heater core outlet air temperature Th, thereby changing the blowing temperature. Control to suppress.

  For example, as shown in FIG. 7 (A), when the engine is idled, the processing is switched from the time when the internal combustion engine 11 is operated, and in the embodiment using the above formulas (1) and (4), for example, FIG. As shown in FIG. 2, even when the internal combustion engine 11 is stopped at an idle stop, compared to the comparative example in which the same processing as that at the time of the operation of the internal combustion engine 11 is performed, the idle stop (stop period) and the internal combustion engine 11 are operated. It can be seen that the change in the blowing temperature is suppressed.

As described above, according to the vehicle air conditioner 10 according to the present embodiment, the parameter (related to the blowing temperature of the air blown from the air conditioner main body 10a into the vehicle compartment when the engine is stopped idle and the internal combustion engine 11 is operating ( That is, since the time constant for the evaporator outlet air temperature Te and the core internal water temperature Tcw and the heater core outlet air temperature Th calculated based on the evaporator outlet air temperature Te is changed, for example, when the engine is idled, Even when the change in the blowing temperature increases, the change in the blowing temperature can be appropriately controlled with high accuracy.
As a result, for example, even during idling stop, it is possible to execute various kinds of control to suppress the change in the blowing temperature by matching the blowing temperature with the target exhalation temperature Tao. Desired comfort can be easily ensured.

  Moreover, for example, it is possible to accurately and appropriately control the change in the temperature of blowing air into the passenger compartment with the existing device configuration without the need to add a new temperature sensor, etc., and the cost required for the device configuration increases. Can be prevented.

Furthermore, for example, when the internal combustion engine 11 is operating, the time constant becomes larger than when idling is stopped, so that various controls are executed at an excessive frequency with respect to the temperature of blowing air into the passenger compartment. Can be prevented.
In addition, for example, when idling is stopped, it is possible to appropriately and accurately control the change in the blowing temperature of the air blown into the passenger compartment, and execute various controls at appropriate timings to suppress the change in the blowing temperature. Therefore, desired comfort in the passenger compartment can be easily ensured.

Further, the evaporator 14 uses the correction value according to the detection result of the outlet air temperature of the evaporator 14, for example, the first correction amount C1 and the second correction amount C2 according to the change amount of the outlet air temperature or the outlet air temperature per unit time. By correcting the detection result of the sensor 19, the evaporator outlet air temperature Te can be accurately detected.
As a result, it is possible to accurately and appropriately control the change in the blowing temperature of the air blown into the vehicle interior, and it is possible to execute various controls that suppress the change in the blowing temperature at appropriate timing. The desired comfort in the room can be easily ensured.

  Further, the coolant temperature (core internal water temperature Tcw) sent to the heater core 16 is calculated based on the calculation result of the evaporator outlet air temperature Te and the air volume passing through the heater core 16 (= F × SW / 100). As a result, the calculation accuracy can be improved.

  Furthermore, by acquiring the air volume (= F × SW / 100) passing through the heater core 16 based on the drive voltage of the blower 13 and the opening degree of the damper 15, the accuracy of the air volume can be improved.

DESCRIPTION OF SYMBOLS 10 Vehicle air conditioner 10a Air conditioner main body 11 Internal combustion engine 13 Blower 14 Evaporator 15 Damper 16 Heater core 18 Control apparatus (control means, air volume acquisition means)
19 Evaporator sensor (temperature sensor)
20 Engine water temperature sensor

Claims (4)

An evaporator, a heater core, and an air conditioner main body are provided. Cooling water heated by an internal combustion engine mounted on a vehicle is sent to the heater core, and the heater core is heated by the cooling water, whereby the cooling water is used as a heat source for the air conditioner. A vehicle air conditioner,
An evaporator sensor that detects the temperature of the air that has passed through the evaporator;
An engine water temperature sensor for detecting a temperature of cooling water flowing through the internal combustion engine;
An air volume acquisition means for acquiring an air volume passing through the heater core;
A damper capable of changing the amount of air introduced into the heater core after passing through the evaporator, depending on the opening;
Control means for controlling the opening degree of the damper based on the outlet air temperature of the evaporator and the outlet air temperature of the heater core so that the temperature of the air blown from the air conditioner body matches the target air temperature,
The control means includes
The time constant for the detection result output from the evaporator sensor is changed so that the time constant at the time of idling stop is smaller than the time constant at the time of operation of the internal combustion engine. And the evaporator outlet air temperature at the time of idling stop,
At the time of idling stop, the outlet air temperature of the heater core is calculated based on the detection result of the engine water temperature sensor at the start of the idle stop, the calculated outlet air temperature of the evaporator, and the air volume acquired by the air volume acquiring means. air conditioning system and obtaining. 2. The vehicle air conditioner according to claim 1, wherein an outlet air temperature of the heater core during the idling stop is obtained by the following formula (4).

n: Any natural number
Th (n): Current value of the heater core outlet air temperature
Tcw: Core internal temperature
Th (n-1): Previous value of the outlet air temperature of the heater core
δ: coefficient
Te: Evaporator outlet air temperature
F x SW / 100: Air volume passing through the heater core The control means according to claim 1 or 2, characterized in that to correct the detection result of the outlet air temperature of the evaporator by a correction value corresponding to the outlet air temperature detection results of the evaporator output from the evaporator sensor The vehicle air conditioner described in 1. A blower for blowing air toward the evaporator and the heater core;
The said air volume acquisition means acquires the air volume which passes the said heater core based on the drive voltage of the said air blower, and the said opening degree of the said damper, The any one of Claims 1-3 characterized by the above-mentioned. Vehicle air conditioner.

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