WO2015159483A1 - Vehicle air conditioning system - Google Patents

Abstract

A vehicle air conditioning system is provided with an acquisition section (S30) and an air-conditioning controller (S40 to S90). The acquisition section acquires: an inner air temperature that is the temperature of a vehicle cabin; an outer air temperature that is the temperature outside the vehicle; and the intensity of solar radiation to the vehicle. The air-conditioning controller calculates a heat load index (TAO) on the basis of the inner air temperature, the outer air temperature, and the intensity of solar radiation as acquired by the acquisition section, and performs air-conditioning control of the vehicle cabin on the basis of the calculated index. The acquisition section acquires the inner air temperature by using an in-vehicle inner air temperature sensor (39) and acquires, from an external server (2) outside the vehicle, the outer air temperature and/or the intensity of solar radiation. The above configuration is used to implement automatic air-conditioning control on the basis of the heat load of the vehicle, thereby decreasing the number of sensors installed in the vehicle for the purpose of achieving the automatic air-conditioning control.

Description

Air conditioner for vehicles Cross-reference of related applications

This application is based on Japanese Patent Application No. 2014-083838 filed on April 15, 2014, the disclosure of which is incorporated herein by reference.

This disclosure relates to a vehicle air conditioner.

Conventionally, a vehicle air conditioner that performs automatic air conditioning control based on the heat load of the vehicle is known. Many of such vehicle air conditioners detect an inside air temperature sensor that detects the temperature inside the vehicle, an outside air temperature sensor that detects the temperature outside the vehicle, and the solar radiation that is applied to the vehicle in calculating the heat load index. A solar radiation sensor is generally used (for example, refer to Patent Document 1).

JP-A-8-332831

However, according to studies by the inventors of the present disclosure, in the vehicle air conditioner as described above, it is essential to attach an inside air temperature sensor, an outside air temperature sensor, and a solar radiation sensor to the vehicle. The number of sensors that should be mounted on the PC increases.

The present disclosure is intended to provide a vehicle air conditioner that performs automatic air conditioning control based on the thermal load of the vehicle and can reduce the number of sensors mounted on the vehicle for automatic air conditioning control.

The vehicle air conditioner according to the present disclosure is specified by an acquisition unit that acquires an inside air temperature that is a temperature inside the vehicle interior of the vehicle, an outside air temperature that is a temperature outside the vehicle, and an amount of solar radiation irradiated to the vehicle, and the acquisition unit. An air conditioning control device that calculates a heat load index based on the inside air temperature, the outside air temperature, and the amount of solar radiation, and performs air conditioning control based on the calculated index. The obtaining unit obtains an inside air temperature using an inside air temperature sensor mounted on the vehicle, and obtains at least one of the outside air temperature and the amount of solar radiation from an outside server located outside the vehicle.

The effects of the inside air temperature, the outside air temperature, and the solar radiation temperature (converted value of solar radiation amount) on the air conditioning control are mainly the influence of the inside air temperature, and the weight of the outside air temperature and the solar radiation temperature is relatively small.

In the vehicle air conditioner of the present disclosure, the inside air temperature is obtained using an inside air temperature sensor mounted on the vehicle, and at least one of the outside air temperature and the amount of solar radiation is obtained from the outside server.

This eliminates the need to install an outside temperature sensor or solar radiation sensor in the vehicle for automatic air conditioning control. In addition, even if the acquired external information is inaccurate compared to the case where it is acquired from an in-vehicle sensor, the outside air temperature and the amount of solar radiation are less important in air conditioning control than the inside air temperature. Absent.

It is a figure which shows the whole system configuration | structure of the vehicle air conditioner in 1st Embodiment. It is a figure which shows arrangement | positioning of the inside temperature sensor and air conditioning unit of this indication. It is a flowchart of the main process of this indication. It is a flowchart of the signal input process in 1st Embodiment. It is a flowchart of the inside air temperature input process in 2nd Embodiment. It is a block diagram of the air conditioning unit in 3rd Embodiment. It is a flowchart of the signal input process in 3rd Embodiment. It is a flowchart of the inside / outside air control process in 3rd Embodiment. It is a flowchart of the additional force process in 3rd Embodiment. It is a timing diagram which shows the suction port mode in 3rd Embodiment, the outside temperature, and the change of inside temperature. It is a timing diagram which shows the suction port mode in 3rd Embodiment, the outside temperature, and the change of inside temperature. It is a figure which shows the relationship between the blower voltage and time in 3rd Embodiment. It is a figure which illustrates the display content of the external communication terminal in 4th Embodiment. It is a figure which shows the air-conditioning operation part installed in the vehicle in 4th Embodiment.

(First embodiment)
The first embodiment will be described below. As shown in FIG. 1, a vehicle air conditioner 1 according to the present embodiment is installed in a vehicle and air-conditions a vehicle interior using a communication system. The communication system includes an out-of-vehicle server 2 and an external communication terminal 3. The external communication terminal 3 acquires the outside air temperature Tam and the solar radiation amount Ts at the current position of the vehicle from the outside server 2 and transmits them to the vehicle air conditioner 1.

The vehicle air conditioner 1 includes an air conditioner unit 10 that constitutes an indoor unit of the vehicle air conditioner 1, a control circuit 31 that controls the air conditioner unit 10, and an operation switch 33 that can be operated by a passenger in the vehicle interior. Yes. In addition, the air conditioning unit 10 forms a ventilation path through which air blown into the passenger compartment is passed.

In the most upstream part of the air conditioning unit 10 in the air flow direction, an inside / outside air switching box 11 having an outside air introduction port 11a and an inside air introduction port 11b is arranged. An inside / outside air switching door 12 is rotatably installed in the inside / outside air switching box 11.

The inside / outside air switching door 12 is arranged at a branch point between the outside air introduction port 11a and the inside air introduction port 11b. The inside / outside air switching door 12 is driven by the actuator 12a to switch the air to be introduced into the ventilation path in the air conditioning unit 10 between the inside air and the outside air, or to adjust the mixing ratio of the inside air and the outside air.

The blower 13 sucks air into the inside / outside air switching box 11 and blows it to the downstream side in the air flow direction of the air conditioning unit 10, and has a blower motor 14 and a centrifugal blower fan 15 connected to the rotating shaft thereof. ing. An evaporator 16 and a heater core 17 are provided downstream of the blower fan 15 in the air flow direction.

The evaporator 16 is a heat exchanger for cooling. The evaporator 16 is combined with a compressor or the like driven by a vehicle engine (not shown) to constitute a refrigeration cycle. The low-pressure refrigerant in the evaporator 16 absorbs heat from the air and evaporates to cool the air. The heater core 17 is a heating heat exchanger. In the heater core 17, cooling water (hot water) of a vehicle engine (not shown) circulates inside, and heats the air using the engine cooling water as a heat source.

An air mix door 18 as an air temperature adjusting unit is rotatably provided upstream of the heater core 17 in the air flow direction, and the opening degree of the air mix door 18 is adjusted by being driven by an actuator 18a. Thereby, the ratio of the air passing through the heater core 17 and the air bypassing the heater core 17 is adjusted, and the temperature of the air blown into the vehicle interior is adjusted.

At the most downstream side of the air flow direction of the air conditioning unit 10, there are a defroster door 20 that opens and closes a defroster (DEF) outlet 19, a face door 22 that opens and closes a face (FACE) outlet 21, and a foot (FOOT) outlet 23. A foot door 24 that opens and closes is provided.

These doors 20, 22, 24 constitute a blow mode switching unit, and are driven by an actuator 25 to open and close the blow outlets 19, 21, 23. Thereby, various blowing modes such as the face mode, the bi-level mode, the foot mode, the foot-def mode, and the defroster mode are set. Then, the temperature-adjusted air is blown out into the passenger compartment from the blow-out opening that opens in accordance with each blowing mode.

The control circuit 31 controls the blower voltage by adjusting the blower voltage applied to the blower motor 14 to adjust the motor rotation speed. The other actuators 12a, 18a, and 25 are also controlled based on the output signal from the control circuit 31.

The control circuit 31 has a central processing unit (CPU), a ROM, a RAM, a standby RAM, an I / O port, an A / D converter, etc. (not shown).

The standby RAM is a RAM that stores data even when the main power of the vehicle is off, and power is directly supplied from the in-vehicle battery without passing through the IG even when the main power of the vehicle is off. Note that the time when the main power supply of the vehicle is off corresponds to, for example, when the vehicle is driven by the power of the internal combustion engine, when the IG is off, or when the vehicle is driven only by the power of the electric motor, when the main switch is off.

The control circuit 31 receives an operation signal from an air conditioning operation unit 33 installed on a dashboard in the vehicle interior. The air conditioning operation unit 33 includes an AUTO switch 34, an inside / outside air changeover switch 35, a blow-out mode changeover switch 36, and an air flow rate changeover switch 37. The AUTO switch 34 switches between automatic air conditioning control and manual air conditioning control. The inside / outside air switching switch 35 is manually operated to switch the inside / outside air suction mode. The blowing mode changeover switch 36 is manually operated to switch the blowing mode. The blower amount changeover switch 37 is manually operated to switch the blower amount of the fan 15.

The air conditioning operation unit 33 further includes a temperature setting switch 38 for setting the passenger's preferred passenger compartment temperature, that is, a set temperature. Specifically, the temperature setting switch 38 includes a set temperature up switch 38a and a set temperature down switch 38b. The set temperature up switch 38a outputs a signal for raising the set temperature by 0.5 ° C. every time the occupant is pressed once. The set temperature down switch 38b outputs a signal for lowering the set temperature by 0.5 ° C. each time the occupant presses the set temperature down switch 38b.

Further, the control circuit 31 receives a signal from a sensor that detects an environmental condition that affects the air conditioning state in the passenger compartment. Specifically, each signal from the inside air temperature sensor 39 or the like for detecting the air temperature (that is, the inside air temperature) Tr in the passenger compartment is input to the control circuit 31, and these signals are A / D converted and read by the control circuit 31. It is. A signal from the temperature setting switch 38 is also input to the control circuit 31, and is A / D converted and read by the control circuit 31.

In the present embodiment, neither an outside air temperature sensor that detects an air temperature (that is, an outside air temperature) Tam outside the vehicle compartment and in the vicinity of the vehicle nor a solar radiation sensor that detects the amount of solar radiation Ts incident on the vehicle interior is mounted on the vehicle. . Therefore, the number of parts of the vehicle air conditioner 1 is reduced accordingly.

In addition, the vehicle air conditioner 1 has an in-vehicle communication interface 40. The in-vehicle communication interface 40 enables communication between the control circuit 31 and the external communication terminal 3 by connecting to the external communication terminal 3 by wire or wirelessly.

The external communication terminal 3 may be a portable communication device (for example, a tablet PC or a smart phone) carried by a vehicle occupant and brought into the passenger compartment, or an in-vehicle communication device attached to the vehicle. . The external communication terminal 3 communicates with the control circuit 31 via the above-described in-vehicle communication interface 40 and also communicates with the external server 2 installed outside the vehicle. The external communication terminal 3 has an air temperature sensor 3x that detects the air temperature around the device itself.

The server 2 outside the vehicle is a device that collects and distributes the current solar radiation amount and the current outside air temperature (external information) at a plurality of points. The server 2 outside the vehicle may be a center server (PC, workstation, etc.) installed in one place. Alternatively, the vehicle exterior server 2 may be an aggregate of a plurality of beacons provided one by one at each of the plurality of points (more specifically, a plurality of points along the road). When the server 2 outside the vehicle is an aggregate of a plurality of beacons, each of the beacons transmits only the solar radiation amount and the outside air temperature at its own position to a predetermined range (for example, surrounding 100 m) around the own aircraft.

The external communication terminal 3 communicates with the outside server 2 in the vehicle interior of the vehicle, and repeats the current solar radiation amount and the current outside air temperature (external information) at the current position of the vehicle from the outside server 2 (for example, periodically 1 minute). Receive at intervals). Whenever the external information is received, the external information is transmitted to the control circuit 31 via the in-vehicle communication interface 40 immediately after the reception.

There are various methods for receiving external information at the current position of the vehicle by the external communication terminal 3. For example, when the out-of-vehicle server 2 is a center server installed in one place, the external communication terminal 3 specifies and specifies the current position of the own device using, for example, a GPS receiver built in the own device. The current position is transmitted to the server 2 outside the vehicle. As a result, the out-of-vehicle server 2 selectively transmits the current external information at the point closest to the transmitted current position to the external communication terminal 3. Further, for example, when the vehicle outside server 2 is an aggregate of the plurality of beacons, even if the current position is not transmitted from the external communication terminal 3, the current solar radiation amount and the current outside air temperature that are simply transmitted from nearby beacons are simply transmitted. Can be the current amount of solar radiation at the current position of the vehicle and the current outside air temperature (external information).

As shown in FIG. 2, the air conditioning unit 10 is disposed in the center of the dashboard in the left-right direction with respect to the traveling direction of the vehicle, and the inside air temperature sensor 39 is disposed on the driver seat side of the dashboard. ing.

FIG. 3 shows a main process of the automatic air conditioning control executed by the control circuit 31. When the AUTO switch 34 is turned on while the operation switch of the vehicle air conditioner 1 is turned on, the control circuit 31 starts the main process of FIG. In addition, the control circuit 31 is activated when the AUTO switch 34 is released, the blow mode switch 36 is operated, the air flow switch 37 is operated, etc. during the execution of the main process of FIG. The process of 3 is finished and well-known manual air-conditioning control is performed.

When the control circuit 31 starts the process of FIG. 3, first, in S20, initial values such as various variables and flags are set. Subsequently, in S30, a signal input process is executed. FIG. 4 shows details of the signal input process. In the signal input process, the control circuit 31 first inputs a set temperature Tset and the like in S32. Specifically, the state of the temperature setting switch 38 of the air conditioning operation unit 33 is input. Subsequently, in step S33, the inside air temperature Tr is input using the inside air temperature sensor 39. Specifically, the inside air temperature Tr is acquired based on the sensor signal from the inside air temperature sensor 39.

Subsequently, in S34, it is determined whether or not external information can be received. The external information includes at least one of the current amount of solar radiation and the current outside air temperature at the current position of the vehicle transmitted from the outside server 2.

As described above, the external communication terminal 3 repeatedly receives external information from the out-of-vehicle server 2 (for example, periodically at an interval of 1 minute), and whenever it is received, immediately after receiving the control circuit via the in-vehicle communication interface 40 31 transmits the information. Accordingly, the control circuit 31 repeatedly (for example, periodically at intervals of 1 minute) receives the latest external information at that time. However, the control circuit 31 may fail to receive external information from the external communication terminal 3.

Failed cases include, for example, a case where the external communication terminal 3 is a portable terminal held by a passenger, or a case where the external communication terminal 3 is not brought into the vehicle. Alternatively, the external communication terminal 3 or the in-vehicle communication interface 40 may break down. Alternatively, communication between the out-of-vehicle server 2 and the external communication terminal 3 may be temporarily impossible according to the movement of the vehicle.

In such cases, the control circuit 31 determines that the external information has not been received in S34 when the previous reception in the repeated reception of the external information has failed, and receives the previous reception. If successful, it is determined that external information has been received.

If it is determined that the external information can be received in S34, the current outside air temperature at the current position of the vehicle is acquired from the external information received immediately before in S35a. The control circuit 31 sets the acquired outside air temperature as an outside air temperature Tam (set value) for calculating a target blowing temperature TAO that is a target temperature of the air blown into the vehicle interior. As is well known, the target outlet temperature TAO is an index of the heat load of the vehicle air conditioner 1.

Subsequently, in S36a, the current amount of solar radiation at the current position of the vehicle is acquired from the external information received immediately before, and the acquired amount of solar radiation is set as the amount of solar radiation Ts (set value) for calculating the target blowing temperature TAO. . The solar radiation amount Ts corresponds to the solar radiation temperature obtained by converting the solar radiation amount expressed in kilowatts into a temperature. In S36a, the signal input process ends S30 and proceeds to S40.

If it is determined in S34 that external information has not been received, an estimated value is set as the outside air temperature Tam for calculating the target blowing temperature TAO in S35b. As the estimated value, for example, the outside air temperature in the external information last acquired from the outside server 2 via the external communication terminal 3 (that is, the previous value of the outside air temperature) may be employed. Since the outside air temperature rarely changes rapidly, the accuracy of the estimated value is maintained to some extent by adopting the previous value. Here, the external information acquired last from the out-of-vehicle server 2 is the external information of the last successful reception among the previous times more than the previous time in the repeated reception.

Alternatively, the estimated value may be a predetermined fixed value (for example, 15 ° C.). However, this fixed value may be determined in advance so as to differ depending on the destination region (North America, South America, Southeast Asia, Europe, etc.) of the vehicle on which the vehicle air conditioner 1 is mounted. In that case, the fixed value may be set to be, for example, the average temperature in the destination area.

Alternatively, after the vehicle air conditioner 1 is activated (or after the main power of the vehicle is turned on), while the external information has not been received once, the estimated value is the inside air when the main power of the previous vehicle is turned on. It may be a value that increases as the inside air temperature detected by the temperature sensor 39 increases. Note that the time when the main power of the vehicle is on, for example, corresponds to the time when the IG is turned on in the case of a vehicle that is driven by the power of the internal combustion engine, and the time when the main switch is turned on in the case of the vehicle that is driven only by the power of the electric motor To do. Since the internal temperature when the vehicle's main power is turned on is often close to the outside temperature, it is possible to determine the rough season based on the internal temperature when the vehicle's main power is turned on and reflect it in the external temperature as described above. it can.

Subsequently, in S36b, an estimated value is set to the solar radiation amount Ts for calculating the target blowing temperature TAO. As the estimated value, for example, the amount of solar radiation in the external information last acquired from the outside server 2 via the external communication terminal 3 (that is, the previous value of the amount of solar radiation) may be employed. By adopting the previous value, the accuracy of the estimated value is maintained to some extent. Alternatively, the estimated value may be a predetermined fixed value. In S36b, the signal input process ends S30 and proceeds to S40.

In S40, the target blowing temperature (index) TAO is calculated by the following formula using the set temperature Tset, the inside air temperature Tr, the outside air temperature Tam, and the solar radiation amount Ts acquired and set in S30.

TAO = Kset × Tset-Kr × Tr-Kam × Tam-Ks × Ts-C
Here, Kset, Kr, Kam, Ks are respective weighting factors. Kset is set to be larger than Kr, and Kr is set to be larger than Kam and Ks. Kam and Ks may be such that Kam is equal to or greater than Ks (Kam ≧ Ks), and Ks is equal to or greater than Kam (Ks ≧ Kam). For example, Kset may be set to 7, Tset may be set to 3, Kam may be set to 1, and Ks may be set to 1 or less. That is, in the control of automatic air conditioning, the influence of the set temperature Tset and the inside air temperature Tr is larger than the influence of the outside air temperature Tam and the solar radiation amount Ts.

Thus, in order to calculate the blowout temperature TAO, the control circuit 31 obtains the inside air temperature using the inside air temperature sensor mounted on the vehicle, and obtains the outside air temperature and the amount of solar radiation from the outside server 2.

As described above, out of the inside air temperature Tr, the outside air temperature Tam, and the solar radiation amount Ts, the inside air temperature Tr mainly influences the calculation of the target blowing temperature TAO and consequently the air conditioning control. That is, the outside air temperature Tam and the solar radiation amount Ts are parameters for additional correction.

For example, in an area where the difference in daily temperature or the difference in temperature throughout the year is small, the influence (correction effect) of the outside air temperature on the automatic air conditioning control is not so great. Therefore, there is a possibility that air conditioning expected by the user can be provided even with automatic air conditioning control using only the inside air temperature sensor 39.

Therefore, by acquiring the outside air temperature and the amount of solar radiation from the outside server 2 as described above, it is not necessary to mount the outside air temperature sensor or the solar radiation amount sensor on the vehicle for the automatic air conditioning control. That is, simple automatic air conditioning can be performed. Further, as a result of acquiring the outside air temperature Tam and the solar radiation amount Ts from the outside server 2, the outside air temperature and the solar radiation amount are compared with the inside air temperature even if the acquired external information becomes inaccurate as compared with the case where it is acquired from the vehicle-mounted sensor. Therefore, the impact on air conditioning control is small compared to the inside air temperature.

Moreover, since the outside air temperature Tam and the solar radiation amount Ts are acquired from the vehicle outside server 2, the outdoor air temperature Tam and the solar radiation amount are compared with the case where the outside air temperature and the solar radiation amount are estimated without using the outside air temperature sensor and the solar radiation amount sensor only in the vehicle. The estimated value of the quantity Ts becomes more accurate. Accordingly, relatively fine automatic air conditioning control can be performed.

Subsequent to the processing of S40, in S50, the opening degree of the air mix door 18 with respect to the target blowing temperature TAO is determined with reference to a control map stored in the control circuit 31 in advance. Then, the actuator 18a is controlled to drive the air mix door 18 so that the opening degree of the air mix door 18 becomes the determined opening degree, and the air blown out from the air outlets 19, 21, 23 into the vehicle interior Adjust the temperature.

Subsequently, in S60, a blower voltage, which is an applied voltage to the blower motor 14, is determined with reference to a control map stored in advance in the control circuit 31 based on the target blowing temperature TAO. The larger the voltage applied to the blower motor 14, the greater the amount of air blown by the blower fan 15, and the larger the amount of air blown into the passenger compartment.

Subsequently, in S70, a suction port mode (outside air introduction mode or inside air circulation mode) that determines the switching state of the inside / outside air switching box 11 is determined, and the actuator 12a is controlled so that the determined suction port mode is executed. The inside / outside air switching door 12 is driven to a predetermined position. This suction port mode is also determined with reference to the control map stored in advance in the control circuit 31 based on the target outlet temperature TAO.

Subsequently, in S80, the air outlet mode is determined, and the actuator 25 is controlled to drive the air outlet mode setting doors 20, 22, 24 to a predetermined position so that the calculated air outlet mode is obtained. This air outlet mode is also determined with reference to a control map stored in advance in the control circuit 31 based on TAO. For example, the outlet mode may be sequentially switched to the foot mode, the bi-level mode, and the face mode as the target outlet temperature TAO increases from the low temperature range to the high temperature range. In this case, the face mode is mainly selected in the summer, the bi-level mode is mainly selected in the spring and autumn, and the foot mode is mainly selected in the winter.

Subsequently, in S90, the rotation speed (rpm) of the compressor is determined, and the compressor is controlled to be driven at the determined rotation speed. The number of rotations of the compressor is also determined with reference to a control map stored in advance in the control circuit 31 based on the target outlet temperature TAO and the like.

The automatic air conditioning control executed by the control circuit 31 returns to S30 after S90. In the loop of S30 to S90, S30 is repeatedly and periodically executed, for example, at a cycle of 250 ms.
(Second Embodiment)
Next, a second embodiment will be described. In the present embodiment, the contents of the inside air temperature input process in S33 of FIG. 4 are changed as shown in FIG. 5 with respect to the first embodiment.

Hereinafter, only the changes to the first embodiment will be described. In the inside air temperature input process of S33, first, in S332, an attempt is made to read the sensor output value of the inside air temperature sensor 39.

Subsequently, in S333, based on the result of reading 332, it is determined whether or not the inside air temperature sensor 39 is normal. For example, if reading of the sensor output value fails, and reading of the sensor output value is successful, but the read sensor output value is out of a predetermined normal range, the inside air temperature sensor 39 is not normal. judge. When the sensor output value has been successfully read and the read sensor output value is within a predetermined normal range, it is determined that the inside air temperature sensor 39 is normal.

When it is determined that the inside air temperature sensor 39 is normal, in S334a, the inside air temperature corresponding to the sensor output value read immediately before is set as the inside air temperature Tr for calculating the target blowing temperature TAO, and S33 is ended. To do.

When it is determined that the inside air temperature sensor 39 is not normal (abnormal), an estimated value is set in the inside air temperature Tr for calculating the target blowing temperature TAO in S334b. As the estimated value, a predetermined fixed value may be used, or the temperature detected by the temperature sensor 3x built in the external communication terminal 3 may be adopted.

When the temperature detected by the temperature sensor 3x is adopted, the control circuit 31 requests the external communication terminal 3 to transmit the temperature detected by the temperature sensor 3x via the in-vehicle communication interface 40, and the external communication terminal 3 Transmits the temperature to the control circuit 31. Thereby, when the sensor output value of the inside air temperature sensor 39 cannot be used using the sensor mounted on the external communication terminal 3 (for example, a smart phone), the inside air temperature Tr is more accurate than the fixed value. An estimate can be obtained.

Further, as the estimated value, for example, a sensor output value within the normal range last obtained from the inside air temperature sensor 39 may be employed.
(Third embodiment)
Next, a third embodiment will be described. This embodiment adds the following changes with respect to 1st, 2nd embodiment.

The configuration of the vehicle air conditioner 1 of the present embodiment is the same as that of the first and second embodiments except for the position of the inside air temperature sensor 39. As shown in FIG. 6, the inside air temperature sensor 39 of the present embodiment is arranged in the air passage in the air conditioning unit 10, downstream of the inside / outside air switching door 12 and the blower fan 15 in the air flow direction, and in the air of the evaporator 16 and the heater core 17. It is arranged upstream in the flow direction. By arranging the inside air temperature sensor 39 at such a position, the inside air temperature sensor 39 can detect the inside air temperature when the suction port mode is the inside air circulation mode, and the suction port mode is set to the outside air introduction mode. If it is, the outside temperature can be detected. That is, the inside air temperature sensor 39 of the present embodiment functions as an inside / outside air sensor.

Further, the contents of the signal input processing in S30 of FIG. 3 are replaced with those of FIG. In the processing of FIG. 4 and the processing of FIG. The process of FIG. 7 is obtained by replacing S33 with S33a and replacing S35b with S35c with respect to the process of FIG.

In S33a following the signal input process, the latest internal air temperature calculated by the additional process of FIG. 9 described later is set as the internal air temperature Tr used in the calculation of the target blowing temperature TAO in S33a. move on.

If the control circuit 31 determines in S34 that external information has not been received, the signal input process proceeds to S35c. In S35c, the latest outside air temperature calculated by the additional process of FIG. 9 described later is set as the outside air temperature Tam used for calculating the target blowing temperature TAO, and the process proceeds to S36b.

Thus, as the inside air temperature Tr used for the calculation of the target outlet temperature TAO, the one calculated by the additional processing is always adopted. Moreover, as the outside temperature Tam used for calculation of the target blowing temperature TAO, the latest external information is adopted when external information can be received, and is calculated by additional processing when external information cannot be received. Adopt things.

Further, in the first and second embodiments, the control circuit 31 determines the suction port mode based on the target outlet temperature TAO in the inside / outside air control process of S70, whereas in the present embodiment, FIG. The process as shown in is executed.

In the process of FIG. 8, the control circuit 31 first determines the suction port mode based on the target outlet temperature TAO in S71 by the same method as in the first and second embodiments. The actuator 12a is controlled to drive the inside / outside air switching door 12 to a predetermined position so that the determined suction port mode is executed.

Subsequently, in S72, it is determined whether or not the duration time of the same suction port mode exceeds the time T1 (for example, 5 minutes). If the duration does not exceed the time T1, the process returns to S71, and if the duration exceeds the time T1, the process proceeds to S73.

In S73, the inlet mode is switched. Specifically, if the current inlet mode is the outside air introduction mode, the inside / outside air switching door 12 is driven to a predetermined position by controlling the actuator 12a so that the inside air circulation mode is executed. If the current suction port mode is the inside air circulation mode, the inside / outside air switching door 12 is driven to a predetermined position by controlling the actuator 12a so that the outside air introduction mode is executed.

Subsequently, in S74, it is determined whether or not the duration of the same suction port mode exceeds time T2 (for example, 15 seconds). If the duration does not exceed the time T2, S74 is executed again, and if the duration exceeds the time T2, the process returns to S71. The time T2 is set to be very short compared to the time T1. For example, the time T2 is set to 1/10 of the time T1.

Thus, when the duration time of the suction port mode based on the target outlet temperature TAO exceeds the time T1 (S72), the mode is forcibly switched regardless of the target outlet temperature TAO (S73). When the time T2 elapses after the mode is switched (S74), the mode returns to the inlet mode based on the target outlet temperature TAO (S71).

Thereby, the inside air temperature sensor 39 can periodically detect the outside air temperature even if the suction port mode based on the target outlet temperature TAO continues to be the inside air circulation mode for a long time. Moreover, even if the suction inlet mode based on the target blowing temperature TAO continues to be the outside air introduction mode for a long time, the inside air temperature can be detected periodically.

Further, the control circuit 31 executes an additional process shown in FIG. 9 in parallel with the main process of FIG. In this additional processing, the inside air temperature and the outside air temperature are calculated based on the sensor output of the inside air temperature sensor 39. As already explained, the inside air temperature calculated by this additional processing is adopted as the inside air temperature Tr for calculating the target blowing temperature TAO in S33a of FIG. Further, the outside air temperature calculated by this additional processing is adopted as the outside air temperature Tam for calculating the target outlet temperature TAO in S35c of FIG.

The control circuit 31 starts the additional process of FIG. 9 when the main power source (for example, IG) of the vehicle is turned on from off. First, in S110, the control circuit 31 determines whether or not an elapsed time from when the main power source is turned off until it is turned on is equal to or longer than a predetermined time T0 (for example, 2 hours). For example, when the main power is turned off, the time at that time is recorded in the backup RAM as an off time, and the difference between the time when the main power is turned on and the off time is calculated, and this difference is used as the elapsed time.

If it is determined that the elapsed time is equal to or longer than the predetermined time T0, the temperature inside the vehicle is likely to be the same as the temperature outside the vehicle. Therefore, in S120, the control circuit 31 calculates the inside air temperature according to the sensor value of the inside air temperature sensor 39 and calculates the outside air temperature according to the sensor value of the inside air temperature sensor 39. That is, the inside air temperature and the outside air temperature are calculated to the same value.

If it is determined that the elapsed time is not equal to or greater than the predetermined time T0, the temperature inside the vehicle interior is not the same as the temperature outside the vehicle, and both the inside air temperature and the outside air temperature are greatly changed from the values when the vehicle main power is turned off. Most likely not. Therefore, in S130, the control circuit 31 calculates the inside air temperature and the outside air temperature regardless of the sensor value of the inside air temperature sensor 39. Specifically, the inside air temperature and the outside air temperature that are finally calculated by the additional processing (ie, the previous time) before turning off the main power are respectively employed as the inside air temperature and the outside air temperature. It should be noted that the inside air temperature and the outside air temperature calculated by the additional processing last before the main power supply is turned off are recorded in the backup RAM when the main power supply is turned off, and are retained even after the main power supply is turned off.

Subsequent to the processing of S120 and S130, in S140, it is determined whether or not the duration of the same suction port mode is within time T3 (for example, 12 seconds). This time T3 is set to be shorter than the time T2 used in S74 of FIG. If it is determined that the duration is within the time T3, the inside air temperature finally calculated in the additional process is adopted as the inside air temperature in S145. continue. In S50, the outside temperature finally calculated by the additional process is adopted as the outside temperature. The additional process shown in FIG. 9 returns to S140 after S150.

As described above, when the duration time of the air inlet mode is within the time T3, the previous values of the inside air temperature and the outside air temperature are adopted regardless of the air inlet mode because the temperature of the ventilation path in the air conditioning unit 10 immediately after switching is used. This is because there is a high possibility that is not the same as the inside air temperature or the outside air temperature.

If it is determined in S140 that the duration exceeds the time T3, it is determined in S155 whether or not the current suction port mode is the inside air circulation mode. The additional process proceeds to S160 if the current inlet mode is the inside air circulation mode, and proceeds to S170 if the outside air introduction mode.

In S160, the temperature corresponding to the sensor output of the inside air temperature sensor 39 is set as the inside air temperature. In subsequent S165, the outside temperature finally calculated by the additional process is adopted as the outside temperature. The addition process returns to S140 after S165.

In S170, the inside air temperature finally calculated by the additional process (that is, the previous time) is adopted as the inside air temperature. In subsequent S175, a temperature corresponding to the sensor output of the inside air temperature sensor 39 is set as the outside air temperature. The addition process returns to S140 after S175.

As described above, in the present embodiment, the control circuit 31 executes the main process of FIG. 3 and the additional process of FIG. 9 simultaneously in parallel, executes the process of FIG. 7 in S30 of the main process, In S70, the process of FIG. 8 is executed. An operation example of the vehicle air conditioner 1 as described above will be described.

In each of the following cases, the control circuit 31 sets the latest inside air temperature adopted by the additional process as the inside air temperature Tr for calculating the target blowing temperature TAO in S33a of FIG. If the external information has not been received, the control circuit 31 sets the latest outside temperature adopted by the additional process as the outside temperature Tam for calculating the target blowing temperature TAO in S35c of FIG. However, when the external information can be received, the outside air temperature Tam for calculating the target blowing temperature TAO is set based on the external information in S35a as in the first and second embodiments.

As example 1, the case where the inside air circulation mode is the basis will be described. Specifically, in Case 1, the inlet mode determined based on the target outlet temperature TAO changes from the outside air introduction mode to the inside air circulation mode, and then the inside air circulation mode continues. FIG. 10 is a time chart showing the time course of the inlet mode and the inside / outside air temperature in Case 1. Note that the inside air temperature and the outside air temperature in FIG. 10 are the inside air temperature and the outside air temperature adopted by the additional processing.

First, in the period immediately before time t11, the control circuit 31 executes the inlet mode (outside air introduction mode) based on the target outlet temperature TAO in S71 in the inside / outside air control of FIG. 8, and the duration time T1 in S72. The process of determining that it is within the range and returning to S71 is repeated. Therefore, the actual suction port mode is the outside air introduction mode.

Further, the control circuit 31 repeats the following process in the additional process of FIG. 9 in the period immediately before the time point t11. First, the control circuit 31 determines that the duration has exceeded T3 in S140, and determines that it is in the outside air introduction mode in subsequent S155. Subsequently, the control circuit 31 adopts the previous value as the inside air temperature in S170, adopts the sensor value as the outside air temperature in S175, and returns to S140. The sensor value is a temperature corresponding to the sensor output of the inside air temperature sensor 39.

Then, at time t11, the suction port mode (suction port mode based on the target outlet temperature TAO) determined by the control circuit 31 in S71 of FIG. 8 changes from the outside air introduction mode to the inside air circulation mode, and thereafter after time t16. Until the inside air circulation mode is maintained.

In that case, between time t11 and time T1, the control circuit 31 executes the suction port mode (inside air circulation mode) based on the target outlet temperature TAO in S71, and determines in S72 that the duration is within the time T1. The process returning to S71 is repeated. Therefore, the actual suction port mode is the inside air circulation mode from time t11 to time T1.

In addition, during the period from time t11 to time T3, the control circuit 31 repeats the following processing in the additional processing. First, the control circuit 31 determines in S140 that the duration is within T3, adopts the previous value as the inside air temperature in S145, adopts the previous value as the outside air temperature in S150, and returns to S140.

Therefore, from the time t11 to the time T3, in the additional processing, the previous value is adopted as the inside air temperature, and the previous value is adopted as the outside air temperature. Thus, the previous value is adopted as the inside air temperature even though the actual suction port mode is the inside air circulation mode. This is because it is not likely that the temperature at the position of the inside air temperature sensor 39 in the ventilation path is the same as the inside air temperature since the time has not passed since the suction port mode is switched to the inside air circulation mode.

When time T3 elapses from time t11 and time t12 is reached, the control circuit 31 determines that the duration has exceeded T3 in S140 of the additional processing, and proceeds to S155. Since the actual suction port mode is also the inside air circulation mode after time t12, the process proceeds from S155 to S160 and the sensor value is adopted as the inside air temperature. Subsequently, in S165, the previous value is adopted as the outside air temperature, and the process returns to S140.

The repetition of S140, S155, S160, and S165 continues until time t13 even after time t12. Therefore, from time t12 to time t13, in the additional processing, the sensor value is employed as the inside air temperature, and the previous value is employed as the outside air temperature. Thus, when sufficient time has passed since the actual suction port mode has been switched to the inside air circulation mode, the temperature at the position of the inside air temperature sensor 39 in the ventilation path is likely to be the same as the inside air temperature. A sensor value is adopted as the inside air temperature.

Thereafter, when the time T1 elapses from the time t11 and reaches the time t13, the control circuit 31 determines in S72 of FIG. 8 that the duration is equal to or longer than the time T1. Subsequently, in S73, the suction port mode is switched from the inside air circulation mode to the outside air introduction mode. Thereafter, until the time T2 elapses from the time point t13, it is determined in S74 that the duration time is equal to or shorter than T2. Thereby, until time T2 passes from time t13, although the suction inlet mode based on the target blowing temperature TAO is the inside air circulation mode, the actual suction inlet mode temporarily becomes the outside air introduction mode.

Further, the control circuit 31 repeats the following process in the additional process until the time T3 elapses after the suction port mode is switched to the outside air introduction mode at time t13. The control circuit first determines that the duration is within T3 in S140, adopts the previous value as the inside air temperature in S145, adopts the previous value as the outside air temperature in S150, and returns to S140. Therefore, between the time t13 and the time T3, in the additional processing, the previous value is adopted as the inside air temperature, and the previous value is adopted as the outside air temperature.

When time T3 (shorter than time T2) elapses from time t13 and time t14 is reached, the control circuit 31 determines that the duration has exceeded T3 in S140 of the additional processing, and proceeds to S155. Since the actual suction port mode is also the outside air introduction mode after time t14, the process proceeds from S155 to S170 and the previous value is adopted as the inside air temperature. Subsequently, the sensor value is adopted as the outside air temperature in S165, and the process returns to S140.

The repetition of S140, S155, S170, and S175 is continued after time t14 until time t15 when the actual inlet mode is switched. Therefore, from time t14 to time t15, in the additional processing, the previous value is adopted as the inside air temperature, and the sensor value is adopted as the outside air temperature. As described above, the outside air temperature can be temporarily detected by the inside air temperature sensor 39 after a sufficient time has elapsed since the actual suction port mode is switched to the outside air introduction mode. Therefore, even when the previous value is adopted as the outside air temperature after time t15, the previous value becomes the detected value of the actual outside temperature at a slightly earlier time.

After the time t14, when the time T2 has elapsed from the time t13 and reaches the time t15, the control circuit 31 determines in S74 of FIG. 8 that the duration has become T2 or more, returns to S71, and is based on the target outlet temperature TAO. Run the inlet mode. As a result, at time t15, the actual suction port mode returns to the same inside air circulation mode as the suction port mode based on the target outlet temperature TAO. Then, between time t15 and time T1, the control circuit 31 executes the suction port mode (inside air circulation mode) based on the target outlet temperature TAO in S71, and determines in S72 that the duration is within the time T1. The process of returning to S71 is repeated. Therefore, the actual suction port mode is the inside air circulation mode from time t15 to time T1.

In addition, during the period from time t15 to time T3, the control circuit 31 repeats the following processing in the additional processing. The control circuit 31 first determines in S140 that the duration is within T3, adopts the previous value as the inside air temperature in S145, adopts the previous value as the outside air temperature in S150, and returns to S140. Therefore, between the time t15 and the time T3, in the additional processing, the previous value is adopted as the inside air temperature, and the previous value is adopted as the outside air temperature.

When time T3 elapses from time t15 and time t16 is reached, the control circuit 31 determines that the duration has exceeded T3 in S140 of the additional processing, and proceeds to S155. After the time t16, since the actual suction port mode is the inside air circulation mode, the control circuit 31 proceeds from S155 to S160, adopts the sensor value as the inside air temperature, adopts the previous value as the outside air temperature at S165, and goes to S140. Return. The repetition of S140, S155, S160, and S165 is continued after the time t16 until the actual suction port mode is switched. Therefore, after time t16, in the additional processing, the sensor value is adopted as the inside air temperature, and the previous value is adopted as the outside air temperature.

Next, as Example 2, the case where the outside air introduction mode is the basis will be described. In Case 2, the inlet mode determined based on the target outlet temperature TAO changes from the inside air circulation mode to the outside air introduction mode, and then the outside air introduction mode continues. FIG. 11 is a time chart showing changes over time in the suction port mode and the inside / outside air temperature in Case 2. Note that the inside air temperature and the outside air temperature in FIG. 11 represent the inside air temperature and the outside air temperature adopted by the additional processing.

First, in the period immediately before time t21, the control circuit 31 executes the suction port mode (inside air circulation mode) based on the target outlet temperature TAO in S71 in the process of FIG. 8, and the duration is less than time T1 in S72. The process of determining that there is and returning to S71 is repeated. Therefore, the actual suction port mode is the inside air circulation mode.

Further, the control circuit 31 repeats the following process in the additional process of FIG. 9 in the period immediately before the time point t21. The control circuit 31 first determines in S140 that the duration exceeds T3, and determines in S155 that the internal air circulation mode is set. Then, the control circuit 31 adopts the sensor value as the inside air temperature in S160, adopts the previous value as the outside air temperature in S165, and returns to S140.

At time t21, the suction port mode (suction port mode based on the target blowout temperature TAO) determined by the control circuit 31 in S71 of FIG. 8 changes from the inside air circulation mode to the outside air introduction mode, and thereafter the outside air until time t16 and thereafter. Suppose that it is maintained in the introduction mode.

In that case, from time t21 to time T1, the control circuit 31 executes the suction port mode (outside air introduction mode) based on the target outlet temperature TAO in S71, and determines in S72 that the duration is within the time T1. The process of returning to S71 is repeated. Therefore, the actual suction port mode is the outside air introduction mode from time t21 to time T1.

In addition, during the time T3 from time t21, the control circuit 31 repeats the following processing in the additional processing. The control circuit 31 first determines in S140 that the duration is within T3, adopts the previous value as the inside air temperature in S145, adopts the previous value as the outside air temperature in S150, and returns to S140. Therefore, between the time t21 and the time T3, in the additional processing, the previous value is adopted as the inside air temperature, and the previous value is adopted as the outside air temperature.

When time T3 elapses from time t21 and time t22 is reached, the control circuit 31 determines that the duration has exceeded T3 in S140 of the additional processing, and proceeds to S155. After the time t22, since the actual suction port mode is the outside air introduction mode, the process proceeds from S155 to S170, the previous value is adopted as the inside air temperature, the sensor value is adopted as the outside air temperature in the subsequent S175, and the process returns to S140.

The repetition of S140, S155, S170, and S175 is continued until time t23 even after time t22. Therefore, from time t22 to time t23, in the additional processing, the previous value is adopted as the inside air temperature, and the sensor value is adopted as the outside air temperature.

Thereafter, when time T1 elapses from time t21 and time t23 is reached, the control circuit 31 determines in S72 of FIG. 8 that the duration is longer than time T1, and in S73, the suction port mode is changed from the outside air introduction mode to the inside air circulation. Switch to mode. Thereafter, until time T2 has elapsed from time t23, it is determined in S74 that the duration is equal to or shorter than T2. Thereby, until time T2 passes from time t23, although the suction inlet mode based on the target blowing temperature TAO is the outside air introduction mode, the actual suction inlet mode temporarily becomes the inside air circulation mode.

Further, the control circuit 31 repeats the following processing in the additional processing until the time T3 has elapsed after the suction port mode is switched to the inside air circulation mode at time t23. The control circuit 31 first determines in S140 that the duration is within T3, adopts the previous value as the inside air temperature in S145, adopts the previous value as the outside air temperature in S150, and returns to S140. Therefore, between the time t13 and the time T3, in the additional processing, the previous value is adopted as the inside air temperature, and the previous value is adopted as the outside air temperature.

When time T3 (shorter than time T2) elapses from time t23 and time t24 is reached, the control circuit 31 determines that the duration has exceeded T3 in S140 of the additional processing, and proceeds to S155. Since the actual suction port mode is also the inside air circulation mode after time t24, the additional processing proceeds from S155 to S160, and the control circuit 31 adopts the sensor value as the inside air temperature in S160, and adopts the previous value as the outside air temperature in S165. Then, the process returns to S140.

The repetition of S140, S155, S160, and S165 continues after time t24 until time t25 when the actual inlet mode is switched. Therefore, from time t24 to time t25, in the additional processing, the sensor value is employed as the inside air temperature, and the previous value is employed as the outside air temperature. As described above, the inside air temperature sensor 39 can temporarily detect the inside air temperature after a sufficient time has elapsed after the actual suction port mode is switched to the inside air circulation mode. Therefore, even when the previous value is adopted as the room temperature after time t25, the previous value becomes the detected value of the actual room temperature at a slightly earlier time.

After the time t24, when the time T2 has elapsed from the time t23 and reaches the time t25, the control circuit 31 determines in S74 of FIG. 8 that the duration has become T2 or more, returns to S71, and is based on the target outlet temperature TAO. Run the inlet mode. As a result, at the time t25, the actual suction port mode returns to the same outside air introduction mode as the suction port mode based on the target outlet temperature TAO. And between time t25 and time T1, the control circuit 31 performs the inlet mode (outside air introduction mode) based on the target blowing temperature TAO in S71, and determines that the duration is within the time T1 in S72. The process of returning to S71 is repeated. Therefore, the actual suction port mode is the outside air introduction mode from time t25 to time T1.

In addition, during the time T3 from the time point t25, the control circuit 31 repeats the following processing in the additional processing. First, it is determined in S140 that the duration is within T3, the previous value is adopted as the inside air temperature in S145, the previous value is adopted as the outside air temperature in S150, and the process returns to S140. Therefore, between the time t25 and the time T3, in the additional processing, the previous value is adopted as the inside air temperature, and the previous value is adopted as the outside air temperature.

When time T3 has elapsed from time t25 and time t26 has elapsed, the control circuit 31 determines that the duration has exceeded T3 in S140 of the additional processing, and proceeds to S155. After the time t26, the actual suction port mode is the outside air introduction mode, so that the process proceeds from S155 to S170, the previous value is adopted as the inside air temperature, the sensor value is adopted as the outside air temperature in S175, and the process returns to S140. The repetition of S140, S155, S170, and S175 is continued after the time t26 until the actual suction port mode is switched. Therefore, after time t26, in the additional processing, the previous value is adopted as the inside air temperature, and the sensor value is adopted as the outside air temperature.

As described above, by arranging the inside air temperature sensor 39 in the ventilation path downstream of the inside / outside air switching door 12 in the air flow direction and upstream of the heat exchangers 16 and 17 in the air flow direction, It can be used as a dual-purpose sensor that detects both the temperature and the outside air temperature. The inside air temperature sensor 39 is arranged upstream of the heat exchangers 16 and 17 in the air flow direction by the heat exchangers 16 and 17 in which the air introduced into the inside / outside air switching box 11 is arranged in the ventilation path. This is because the value before the temperature change is detected.

In the present embodiment, a relationship of T1> T2> T3 is established between the times T1, T2, and T3. The time T3 from when the suction port mode is switched to when the inside air temperature sensor 39 is used according to the switched suction port mode and the time T2 until the suction port mode is restored may be fixed values. As illustrated in FIG. 12, it may be set so as to decrease as the blower voltage determined in S <b> 60 increases.

In the example of FIG. 12, when the blower voltage is a low voltage lower than the first threshold, the times T3 and T2 are 15 seconds and 12 seconds, respectively. When the blower voltage is a medium voltage that is equal to or higher than the first threshold value and lower than the second threshold value, the times T3 and T2 are 10 seconds and 7 seconds, respectively. When the blower voltage is a high voltage equal to or higher than the second threshold, the times T3 and T2 are 5 seconds and 3 seconds, respectively.

The time T3 is adjusted in this way because the higher the blower voltage, the faster the air in the ventilation path is replaced, so that the temperature at the position of the inside air temperature sensor 39 is switched faster and the air corresponding to the inlet mode after switching It is because it becomes the temperature of. Further, by adjusting the time T2 in this way, the suction port mode based on the target outlet temperature TAO and the actual suction port mode are different from each other by utilizing the fact that the blower voltage is increased and the time T3 is shortened. Can be resolved more quickly.
(Fourth embodiment)
Next, a fourth embodiment will be described. This embodiment is obtained by adding the modifications described below to the first to third embodiments.

In this embodiment, the external communication terminal 3 is a portable terminal carried by the user, and can be used as an operation and display device for the vehicle air conditioner 1. The external communication terminal 3 executes predetermined programs to operate the operation units 3b, 3c, 3d, and the like for operating the vehicle air conditioner 1 on its own display screen 3a as illustrated in FIG. And the information display parts 3e and 3f which display the operating state of the vehicle air conditioner 1 are displayed.

In the example of FIG. 13, various changeover switches for switching a plurality of functions of the vehicle air conditioner 1 are displayed on the external communication terminal 3 as the operation unit. Specifically, as the changeover switch, there are blower amount changeover switches 3b and 3c for manually increasing or decreasing the blower amount of the blower fan 15, and a blowout mode changeover switch 36 for manually setting the blowout mode. It is displayed. The changeover switch to be displayed on the external communication terminal 3 can be arbitrarily changed by the user of the external communication terminal 3 operating the external communication terminal 3.

In the example of FIG. 13, an information display unit indicating a plurality of operating states of the vehicle air conditioner 1 is displayed on the external communication terminal 3. Specifically, as the information display unit, a blower level display unit 3f that displays a blower level that indicates the amount of air blown by the blower fan 15 and a set temperature display unit 3e that displays a set temperature Tset are displayed on the external communication terminal 3. ing. The information display unit displayed on the external communication terminal 3 can be arbitrarily changed by the user of the external communication terminal 3 operating the external communication terminal 3.

The external communication terminal 3 transmits the operation signal according to the user's operation to the operation units 3b to 3d to the control circuit 31 via the in-vehicle communication interface 40 by executing the above program. And the control circuit 31 changes the control content (target blowing temperature TAO etc.) of the vehicle air conditioner 1 so that the air-conditioning control according to the operation signal received from the external communication terminal 3 may be performed.

Further, the control circuit 31 sends information indicating the operation state of the vehicle air conditioner 1 such as the set temperature Tset, the inside air temperature Tr, the outside air temperature Tam, the blower level, the blowout mode, the suction port mode, and the like via the in-vehicle communication interface 40. The external communication terminal 3 is used. And the external communication terminal 3 selects required information from the information which shows the operation state received from the control circuit 31, and displays it on the display screen 3a.

Also, a simple operation and display unit is arranged on the vehicle so that basic air conditioning operation can be performed without the external communication terminal 3. Specifically, an air conditioning operation unit (in-vehicle panel) 330 shown in FIG. 14 is installed on the dashboard in the vehicle interior instead of the air conditioning operation unit 33 installed in the first to third embodiments.

The air-conditioning operation unit 330 has three operation switches, specifically, an AUTO switch 33a, a defroster switch (DEF switch) 33b, and a temperature setting switch 33c as buttons that can be operated by the occupant. The AUTO switch 33a has the same function as the AUTO switch 34 of the first to third embodiments, and sets whether to execute automatic air conditioning control or manual air conditioning control. The DEF switch 33b sets whether the blowing mode is set to the defroster mode or the other mode. When the DEF switch 33b is operated, the control circuit 31 controls the air conditioning unit 10 so that the blowout mode corresponding to the operation is executed by the manual air conditioning control. The temperature setting switch 33c has the same function as the temperature setting switch 38 of the first to third embodiments.

Thus, the air-conditioning operation unit 330 of the present embodiment does not include any of the inside / outside air switching switch 35, the blowing mode switching switch 36 that can arbitrarily switch the blowing mode, the air volume switching switch 37, and the pollen mode switch. Therefore, the configuration of the vehicle air conditioner 1 in the vehicle becomes simpler.

In addition, as a simple display part provided in a vehicle, you may provide the display part which displays only preset temperature, for example. The external communication terminal 3 may display the operation switches 33a, 33b, and 33c having the same function as the air conditioning operation unit 330 in an overlapping manner.

In each of the above embodiments, the control circuit 31 functions as an example of an acquisition unit by executing S30, and functions as an example of an air conditioning control device by executing S40 to S90.
(Other embodiments)
Note that the present disclosure is not limited to the above-described embodiment, and can be appropriately changed within the scope described in the claims. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes.

Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like. For example, the following modifications are allowed. In addition, the following modifications can select application and non-application to the said embodiment each independently. In other words, any combination of the following modifications can be applied to the above-described embodiment.

For example, in each of the above embodiments, the vehicle air conditioner 1 has neither an outside air temperature sensor nor a solar radiation amount sensor. However, the vehicle air conditioner 1 may have an outside air temperature sensor or a solar radiation amount sensor installed in the vehicle.

If the control circuit 31 has the outside temperature sensor, the control circuit 31 sets the outside temperature Tam for calculating the target blowing temperature TAO to a value corresponding to the sensor output of the outside temperature sensor. Moreover, if the control circuit 31 has the said solar radiation amount sensor, it will set the solar radiation amount Ts for calculating the target blowing temperature TAO to the value according to the sensor output of the said solar radiation amount sensor.

In the above embodiment, the control circuit 31 uses the outside air temperature and the amount of solar radiation in the external information last acquired from the vehicle outside server 2 when the reception of the previous time in the repeated reception of the external information fails, and the target blowing temperature. TAO is calculated. However, as the last acquired external information, the target blowout temperature TAO is calculated using external information other than the external information of the last successful reception out of the previous times in the repeated reception. Also good. For example, the target blowing temperature TAO may be calculated by using the average value of the last five external information that has been successfully received out of the previous times in the repeated reception.

Claims (5)

1. An acquisition unit (S30) for acquiring an inside air temperature that is a temperature inside a vehicle interior of the vehicle, an outside air temperature that is an outside temperature of the vehicle, and an amount of solar radiation irradiated to the vehicle;
   A thermal load index (TAO) is calculated based on the inside air temperature, the outside air temperature, and the amount of solar radiation acquired by the acquisition unit, and air conditioning control of the vehicle interior of the vehicle is performed based on the calculated index. An air conditioning control device (S40 to S90),
   The acquisition unit
   The inside air temperature is obtained using an inside air temperature sensor (39) mounted on the vehicle,
   The vehicle air conditioner that obtains at least one of the outside air temperature and the amount of solar radiation from a vehicle outside server (2) outside the vehicle.
2. The acquisition unit
   External information including at least one of the outside air temperature and the amount of solar radiation is repeatedly obtained from the outside server,
   Setting at least one of the outside air temperature and the amount of solar radiation included in the acquired external information as a setting value for calculating the index,
   When the external information cannot be acquired from the outside server, at least one of the outside temperature and the solar radiation amount included in the external information acquired in the past from the outside server is used to calculate the index. The vehicle air conditioner according to claim 1, which is set as a set value.
3. A communication interface (40) for communicating with an external communication terminal (3) capable of communicating with the outside server;
   The acquisition unit acquires at least one of the outside temperature and the amount of solar radiation from the outside server via the external communication terminal and the communication interface,
   The vehicle air conditioning according to claim 1 or 2, wherein the acquisition unit acquires a detected value of a temperature sensor (3x) mounted on the external communication terminal as the internal air temperature when an abnormality occurs in the internal air temperature sensor. apparatus.
4. An air conditioning unit (10) that forms a ventilation path through which air blown into the vehicle compartment flows;
   The inside air temperature sensor is arranged downstream of the air flow direction of the inside / outside air switching door (12) for switching between the inside air and the outside air and upstream of the heat exchanger (16, 17) in the air flow direction in the ventilation path. ,
   The vehicle air conditioning according to any one of claims 1 to 3, wherein when the inside / outside air mode of the vehicle air conditioner is an outside air mode, the obtaining unit obtains a detection value of the inside air temperature sensor as the outside air temperature. apparatus.
5. A communication interface (40) that is carried by a passenger of the vehicle and communicates with a portable communication device (3) capable of communicating with the server outside the vehicle;
   The acquisition unit acquires at least one of the outside air temperature and the amount of solar radiation from the vehicle outside server via the communication interface and the portable communication device,
   The said air-conditioning control apparatus is a vehicle air-conditioning apparatus as described in any one of Claim 1 thru | or 4 which changes control content according to the operation signal which the said portable communication apparatus transmitted based on the said passenger | crew's operation.

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