JP2015202816A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the number of sensors mounted on a vehicle for automatic air conditioning control, in an air conditioner for a vehicle which performs automatic air conditioning control based on thermal load of a vehicle.SOLUTION: In an air conditioner for a vehicle 1, based on inside air temperature, outside air temperature, and insolation, a target blow-out temperature TAO of thermal load is calculated, and based on the calculated target blow-out temperature TAO, air conditioning control is made. An inside air temperature is acquired by using an inside air temperature sensor 39 mounted on a vehicle, and the outside air temperature and the insolation are acquired from an outside-car server 2 external to the vehicle.

Description

  The present invention relates to a vehicle air conditioner.

  2. Description of the Related Art Conventionally, vehicle air conditioners that perform automatic air conditioning control based on the heat load of the vehicle are 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, in the vehicle air conditioner as described above, it is indispensable to attach an inside air temperature sensor, an outside air temperature sensor, and a solar radiation sensor to the vehicle, and as a result, the number of sensors to be mounted on the vehicle increases. There is a problem of end.

  In view of the above problems, an object of the present invention is to reduce the number of sensors mounted on a vehicle for automatic air conditioning control in a vehicle air conditioner that performs automatic air conditioning control based on the thermal load of the vehicle.

  In order to achieve the above object, an invention according to claim 1 acquires an inside air temperature that is a temperature inside a vehicle interior of a vehicle, an outside air temperature that is a temperature outside the vehicle, and an amount of solar radiation irradiated to the vehicle. A heat load index (TAO) is calculated based on the acquisition means (S30), the inside air temperature, the outside air temperature, and the amount of solar radiation specified by the acquisition means, and air conditioning control is performed based on the calculated index. Air conditioning control means (S40 to S90), wherein the acquisition means acquires the inside air temperature using an inside air temperature sensor (39) mounted on the vehicle, and at least of the outside air temperature and the solar radiation amount One quantity is obtained from the vehicle outside server (2) outside the vehicle.

  According to the study of the present inventor, 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. Are often small.

  Thus, as described above, the inventor of the present application conceived that the inside air temperature is obtained using the 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. did.

  By doing in this way, it becomes unnecessary to mount an outside temperature sensor or a solar radiation amount sensor in vehicles for automatic air-conditioning control. Moreover, even if the acquired information becomes inaccurate as compared to the case where the acquired information is acquired from the in-vehicle sensor as a result of acquiring at least one of the outside air temperature and the amount of solar radiation from the outside server, the outside air temperature and the amount of solar radiation are Since the degree of importance is low, the adverse effect on the air conditioning control is limited.

  In addition, the code | symbol in the bracket | parenthesis in the said and the claim shows the correspondence of the term described in the claim, and the concrete thing etc. which illustrate the said term described in embodiment mentioned later. .

It is a figure which shows the whole system configuration | structure of 1st Embodiment of this invention. It is a figure which shows arrangement | positioning of the internal temperature sensor 39 and the air conditioning unit 10. FIG. It is a flowchart of a main process. 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 10 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 T3 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 of the present invention will be described below. As shown in FIG. 1, the communication system according to the present embodiment includes a vehicle air conditioner 1 installed in a vehicle and a server 2 outside the vehicle. The communication system further includes an external communication terminal 3 that acquires the outside air temperature TAM at the current position of the vehicle 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 group 33 that can be operated by a passenger in the vehicle interior. ing. The air-conditioning unit 10 forms a ventilation path through which air is blown into the vehicle interior of the vehicle. The air-conditioning unit 10 has an outside-air introduction port 11a and an inside-air introduction port 11b on the most upstream side of the air flow. 11, 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, and is driven by the actuator 12a to switch the air introduced into the ventilation path in the air conditioning unit 10 between the inside air and the outside air, Or the mixing ratio of inside air and outside air is adjusted.

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

  The evaporator 16 is a heat exchanger for cooling, and 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 interior absorbs heat from the air and evaporates to cool the air. To do. The heater core 17 is a heat exchanger for heating, and coolant (hot water) of a vehicle engine (not shown) circulates inside, and heats the air using the engine coolant as a heat source.

  On the upstream side of the heater core 17, an air mix door 18 as a blown air temperature adjusting means is rotatably provided, 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 out into the vehicle interior is adjusted.

  At the most downstream of the air conditioning unit 10, 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 door 24 that opens and closes a foot (FOOT) outlet 23. Is provided.

  Each of these doors 20, 22 and 24 constitutes an air outlet mode switching means, and is driven by an actuator 25 to open and close the air outlets 19, 21 and 23, thereby opening various air outlet modes (face mode, bi-level mode, Foot mode, foot differential mode, defroster mode, etc.) 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 conversion unit, 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 of the vehicle is turned off corresponds to, for example, when the vehicle is driven by the power of the internal combustion engine, when the IG is turned off, and when the vehicle is driven only by the power of the electric motor, the time when the main switch is turned off.

  An operation signal is input to the control circuit 31 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 for setting whether to execute automatic air conditioning control or manual air conditioning control, an inside / outside air changeover switch 35 for manually setting the inside / outside air suction mode, and a blowing mode. A blow mode switching switch 36 for manually switching and setting, and an air volume switching switch 37 for manually switching and setting the air volume of the fan 15 are included.

  The air conditioning operation unit 33 also includes a temperature setting switch 38 for setting a 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. each time the occupant presses the switch. The set temperature down switch 38b outputs a signal for lowering the set temperature by 0.5 ° C. each time the occupant is pressed once.

  The control circuit 31 also 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 the outside air temperature sensor that detects the air temperature (outside air temperature) Tam outside the vehicle compartment nor in the vicinity of the vehicle nor the solar radiation sensor that detects the amount of solar radiation Ts entering the vehicle interior is mounted on the vehicle. Therefore, the number of parts of the vehicle air conditioner 1 is reduced accordingly.

  The vehicle air conditioner 1 has an in-vehicle communication interface 40. The in-vehicle communication interface 40 is connected to the external communication terminal 3 in a wired or wireless manner, and enables communication between the control circuit 31 and the external communication terminal 3 through the connection.

  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 information on the current amount of solar radiation and the current outside air temperature at a plurality of points. The out-of-vehicle server 2 may be realized as a center server (PC, workstation, etc.) installed at one place. Alternatively, the out-of-vehicle server 2 may be realized as an aggregate of a plurality of beacons provided one at each of the plurality of points (more specifically, a plurality of points along the road). In the latter case, each of these beacons transmits only information on the amount of solar radiation and the outside air temperature at its own position to a predetermined range (for example, around 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 information on the current solar radiation amount and the current outside air temperature at the current position of the vehicle from the outside server 2 (for example, at regular intervals of 1 minute). ) Receive. Each time the information is received, the information is immediately transmitted to the control circuit 31 via the in-vehicle communication interface 40.

  There are various methods for receiving information on the current amount of solar radiation at the current position of the vehicle and the current outside air temperature by the external communication terminal 3. For example, when the out-of-vehicle server 2 is realized as a center server installed at one place, the external communication terminal 3 specifies the current position of the own device using, for example, a GPS receiver built in the own device. The specified current position is transmitted to the server 2 outside the vehicle. As a result, the server 2 outside the vehicle selectively transmits to the external communication terminal 3 information on the current solar radiation amount and the current outside air temperature at the point closest to the transmitted current position. Further, for example, when the out-of-vehicle server 2 is realized as an aggregate of the plurality of beacons, the current solar radiation amount and the current amount transmitted from the nearby beacons are simply transmitted without transmitting the current position from the external communication terminal 3. Can be used as information on the current amount of solar radiation at the current position of the vehicle and the current outside air temperature.

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

  FIG. 3 shows the 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. Further, the control circuit 31 may be configured such that when the AUTO switch 34 is released, the blow mode switch 36 is operated, the air flow rate switch 37 is operated, etc. during the execution of the main process of FIG. The process is terminated and well-known manual air conditioning control is performed.

  When the control circuit 31 starts the process of FIG. 3, first, in step S20, initial values such as various variables and flags are set. Subsequently, in step S30, a signal input process is executed. FIG. 4 shows details of the signal input process. In the signal input process, first, in step S32, the set temperature Tset and the like are input. 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 step S34, it is determined whether or not external information can be received. The external information is information on the current solar radiation amount and the current outside air temperature at the current position of the vehicle, which is 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.

  For example, when the external communication terminal 3 is a portable terminal held by an occupant, the external communication terminal 3 may not be brought into the vehicle in the first place. Further, for example, the external communication terminal 3 or the in-vehicle communication interface 40 may break down. In addition, for example, 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, when the previous reception in the repeated reception of external information has failed, the control circuit 31 determines that the external information has not been received in step S34, and received the previous reception. If successful, it is determined that external information has been received.

  If it is determined in step S34 that external information has been received, the process proceeds to step S35a, where the current outside air temperature at the current position of the vehicle is acquired from the external information received immediately before, and this is blown into the vehicle interior. Is set as the outside air temperature Tam for calculating the target blowing temperature TAO which is the target temperature. As is well known, the target outlet temperature TAO is an index of the heat load of the vehicle air conditioner 1.

  Subsequently, in step 36a, the current solar radiation amount at the current position of the vehicle is acquired from the external information received immediately before, and this is set as the solar radiation amount Ts 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. After step S36a, step S30 is ended and the process proceeds to step S40.

  If it is determined in step S34 that external information has not been received, the process proceeds to step S35b, and an estimated value is set to the outside air temperature Tam for calculating the target outlet temperature TAO. 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 area (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 turned on corresponds to, for example, 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 when the vehicle is driven only by the power of the electric motor. 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.

  Then, it progresses to step S36b and 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. After step S36b, step S30 is ended and the process proceeds to step S40.

In step S40, 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 step S30, the target blowing temperature TAO is calculated by the following equation.
TAO = Kset * Tset-Kr * Tr-Kam * Tam-Ks * Ts-C
Here, Kset, Kr, Kam, Ks are respective weighting factors. Kset is set larger than Kr, and Kr is set larger than Ks than Kam. Kam and Ks may be Kam ≧ Ks or 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.

  As described above, 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 vehicle server 2 in order to calculate the blowing temperature TAO.

As described above, the influence of the inside air temperature Tr is mainly the influence of the inside air temperature Tr, the outside air temperature Tam, and the solar radiation temperature Ts on the calculation of the target blowout temperature TAO and thus on the air conditioning control. That is, the outside air temperature and the amount of solar radiation are parameters for additional correction.
For example, in an area where the temperature difference of the day or the temperature difference throughout the year is small, the influence (correction effect) of the outside air temperature on the automatic air conditioning control is not so large. Even with air conditioning control, there is a possibility that the air conditioning expected by the user can be provided.

  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 an outside air temperature sensor or a solar radiation amount sensor on the vehicle for automatic air conditioning control. That is, simple automatic air conditioning is realized. Moreover, even if the acquired information becomes inaccurate as compared with the case where the acquired information is acquired from the vehicle-mounted sensor as a result of acquiring the outdoor air temperature Tam and the solar radiation amount Ts from the vehicle outside server 2, the outdoor air temperature and the solar radiation amount are compared with the internal air temperature. Since the degree of importance is low, the adverse effect on air conditioning control is limited.

  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 realized.

  Subsequent to step S40, the process proceeds to step S50, where 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. And the actuator 18a is controlled so that it may become this determined opening degree, and the temperature of the air which blows off from each blower outlet 19, 21, and 23 into a vehicle interior is adjusted.

  Subsequently, in step 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 outlet 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 step S70, a suction port mode (whether the outside air introduction mode or the 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 realized. Then, 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 step S80, the air outlet mode is determined, and the actuator 25 is controlled to drive the air outlet mode setting doors 20, 22, and 24 to predetermined positions 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 from the foot mode to the bi-level mode to 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 step S90, the rotation speed (rpm) of the compressor is determined, and the compressor is controlled so that the determined rotation speed is realized. 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.

  After step S90, the process returns to step S30. In the loop of steps S30 to S90, step S30 is repeatedly and periodically executed, for example, at a cycle of 250 ms.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the present embodiment, the contents of the inside air temperature input process in step S33 of FIG. 4 are changed as shown in FIG. 5 with respect to the first embodiment.

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

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

  When it determines with it being normal, it progresses to S334a, sets the internal air temperature according to the sensor output value read immediately before as the internal air temperature Tr for calculating the target blowing temperature TAO, and complete | finishes step S33.

  When it determines with it being normal (it is abnormal), it progresses to S334b and an estimated value is set to the inside temperature Tr for calculating the target blowing temperature TAO. As the estimated value, a predetermined fixed value may be used. For example, the temperature detected by the temperature sensor 3x built in the external communication terminal 3 may be used.

  In the latter case, 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 in response to this request, the external communication terminal 3 The temperature is transmitted to the control circuit 31. In this way, 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 accuracy is higher than the fixed value. The estimated value of the high inside air temperature Tr can be acquired.

  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 of the present invention will be described. This embodiment adds the following changes with respect to 1st, 2nd embodiment.

  First, 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 disposed downstream of the inside / outside air switching door 12 and the blower fan 15 and upstream of the evaporator 16 and the heater core 17 in the ventilation path in the air conditioning unit 10. Yes. 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 step S30 in FIG. 3 are replaced from those in FIG. 4 to those in FIG. The processing contents of the steps with the same step numbers in the processing of FIG. 4 and the processing of FIG. 7 are the same. The process of FIG. 7 is obtained by replacing step S33 with step S33a and replacing step S35b with step S35c with respect to the process of FIG.

  Subsequent to step S32, in step S33a, the latest inside air temperature calculated by the additional processing of FIG. 9 described later is set as the inside air temperature Tr used for calculation of the target blowing temperature TAO, and the process proceeds to step S34.

  If it is determined in step S34 that external information has not been received, the process proceeds to step S35c, and the latest outside air temperature calculated by the additional processing of FIG. 9 described later is used as the outside air temperature Tam used for calculating the target outlet temperature TAO. And proceed to step S36b.

  Thus, as the inside air temperature Tr used for the calculation of the target blowing 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.

  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 in step S70, whereas in the present embodiment, the control circuit 31 The process as shown in FIG.

  In the process of FIG. 8, first, in step S71, the suction port mode is determined based on the target outlet temperature TAO by the same method as in the first and second embodiments, and the determined suction port mode is realized so as to realize the determined suction port mode. 12a is controlled to drive the inside / outside air switching door 12 to a predetermined position.

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

  In step S73, the inlet mode is switched. Specifically, if the current inlet mode is the outside air introduction mode, the actuator 12a is controlled to drive the inside / outside air switching door 12 to a predetermined position so that the inside air circulation mode is realized. If the current inlet 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 realized.

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

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

  As a result, 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 remains in 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. 3. In this additional process, the inside air temperature is determined based on the sensor output of the inside air temperature sensor 39. And the outside air temperature is calculated. As already described, 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 step S33a of FIG. Moreover, the outside temperature calculated by this additional process is employ | adopted as outside temperature Tam for calculating the target blowing temperature TAO by FIG.7 S35c.

  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 the off state. First, in step S110, the main power source is turned off and then turned on. It is determined whether the elapsed time is equal to or longer than a predetermined time T0 (for example, 2 hours). As for the elapsed time from when the main power is turned off to when it is turned on, for example, the current time is recorded in the backup RAM as the off time when the main power is turned off, and the current time and the above time when the main power is turned on thereafter. The difference from the off time is calculated, and this is used as the elapsed time.

  When it is determined that the time is equal to or longer than the predetermined time T0, there is a high possibility that the temperature in the passenger compartment is the same as the temperature outside the vehicle. Therefore, in this case, the control circuit 31 proceeds to step S120, 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 it is not equal to or greater than the predetermined time T0, the temperature in the vehicle interior may not be the same as the temperature outside the vehicle, and neither the inside air temperature nor the outside air temperature may have changed significantly from the value when the vehicle main power is off. Is expensive. Therefore, in this case, the control circuit 31 proceeds to step S130, and 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 that was calculated last in the additional processing before the main power supply was turned off (ie, the previous time) was used as the inside air temperature, and the outside air temperature was calculated in the last additional processing before the main power supply was turned off. Adopt the outside temperature (ie last time). Note 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 steps S120 and S130, in step S140, it is determined whether or not the duration of the same inlet mode is within time T3 (for example, 12 seconds). This time T3 is set as a time shorter than the time T2 used in step S74 of FIG. When it is determined that the time is within the time T3, in step S145, the internal air temperature calculated by the additional process (that is, the previous time) is finally adopted as the internal air temperature. Subsequently, in step S50, the external air temperature is finally applied. The outside air temperature calculated by the additional processing (that is, the previous) is adopted. After step S150, the process returns to step S140.

  As described above, when the duration of the suction port mode is within the time T3, the previous values of the inside air temperature and the outside air temperature are adopted regardless of the suction port mode because the temperature of the ventilation path in the air conditioning unit 10 is immediately after switching. 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 step S140 that the time T3 has been exceeded, the process proceeds to step S155, where it is determined whether or not the current suction port mode is the inside air circulation mode. If the mode is selected, the process proceeds to step S170.

  In step S160, which proceeds when the inside air circulation mode is set, a temperature corresponding to the sensor output of the inside air temperature sensor 39 is set as the inside air temperature. In the subsequent step 165, the outside air temperature finally calculated by the additional processing (that is, the previous outside air temperature) is adopted as the outside air temperature. After step S165, the process returns to step S140.

  In step S170 that proceeds when the mode is the outside air introduction mode, the inside air temperature that is finally calculated by the additional processing (that is, the previous time) is adopted as the inside air temperature. In subsequent step S175, a temperature corresponding to the sensor output of the inside air temperature sensor 39 is set as the outside air temperature. After step S175, the process returns to step S140.

  As described above, in the present embodiment, the control circuit 31 executes the main process in FIG. 3 and the additional process in FIG. 9 simultaneously in parallel, and executes the process in FIG. 7 in step S30 of the main process. In step 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 step S33a of FIG. If the external information has not been received, the control circuit 31 sets the latest outside air temperature adopted by the additional process as the outside air temperature Tam for calculating the target blowing temperature TAO in step 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 first external information in step S35a as in the first and second embodiments.

[Case 1] When the inside air circulation mode is basic First, as the case 1, the suction port 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. The case that continues is explained. 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 realizes the suction port mode (outside air introduction mode) based on the target blowing temperature TAO in step S71 in the process of FIG. 8, and the duration is within T1 in step S72. The process of determining that it is and returning to step 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 time t11. First, in step S140, it is determined that the duration exceeds T3, and in subsequent step 155, it is determined that the outside air introduction mode is set. Then, in the following step S170, the previous value is adopted as the inside air temperature, and in the succeeding step S175, the sensor value (the temperature corresponding to the sensor output of the inside air temperature sensor 39; the same applies hereinafter) is adopted as the outside air temperature, and the process returns to step S140.

  At time t11, the suction port mode (suction port mode based on the target blowing temperature TAO) determined by the control circuit 31 in step S71 in FIG. 8 changes from the outside air introduction mode to the inside air circulation mode, and thereafter, at time t16. It is assumed that the inside air circulation mode is maintained until then.

  In that case, between time t11 and time T1, the control circuit 31 implement | achieves the suction inlet mode (inside air circulation mode) based on the target blowing temperature TAO by step S71, and determines with continuing time being less than T1 by step S72. Then, the process of returning to step 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, in step S140, it is determined that the duration is within T3. In the following step 145, the previous value is adopted as the inside air temperature. In the following step S150, the previous value is adopted as the outside air temperature, and the process returns to step S140.

  Therefore, between the time t11 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. 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 exceeds T3 in step S140 of the additional processing, and proceeds to step S155. Since the actual suction port mode is also the inside air circulation mode after time t12, the process proceeds from step S155 to step S160, the sensor value is adopted as the inside air temperature, the previous value is adopted as the outside air temperature in the subsequent step S165, and the process proceeds to step S140. Return.

  The repetition of steps 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 is 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. Therefore, a sensor value is adopted as the inside air temperature.

  Thereafter, when time T1 elapses from time t11 and time t13 is reached, the control circuit 31 determines in step S72 of FIG. 8 that the duration is T1 or longer, and in step S73, the suction port mode is changed from the internal air circulation mode to the outside air. Switch to introductory mode. Thereafter, until the time T2 has elapsed from the time point t13, it is determined in step S74 that the duration time is equal to or shorter than T2. As a result, until the time T2 elapses from the time point t13, the actual suction port mode is temporarily outside air even though the suction port mode based on the target outlet temperature TAO is the inside air circulation mode. It becomes 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 the time point t13. First, in step S140, it is determined that the duration is within T3. In the following step 145, the previous value is adopted as the inside air temperature. In the following step S150, the previous value is adopted as the outside air temperature, and the process returns to step 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 reaches time t14, the control circuit 31 determines in step S140 of the additional processing that the duration exceeds T3 and proceeds to step S155. Become. After the time t14, since the actual suction port mode is the outside air introduction mode, the process proceeds from step S155 to step S170, the previous value is adopted as the inside air temperature, the sensor value is adopted as the outside air temperature in the subsequent step S165, and the process proceeds to step S140. Return.

  The repetition of steps 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 step S74 of FIG. 8 that the duration has become T2 or more, returns to step S71, and the target blowing temperature TAO Realizes the inlet mode based on 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. And between time t15 and time T1, the control circuit 31 implement | achieves the suction inlet mode (inside air circulation mode) based on the target blowing temperature TAO by step S71, and determines with continuing time being less than T1 by step S72. The process of returning to step S71 is repeated. Therefore, the actual suction port mode is the inside air circulation mode from time t15 to time T1.

  Further, during the period from time t15 to time T3, the control circuit 31 repeats the following processing in the additional processing. First, in step S140, it is determined that the duration is within T3. In the following step 145, the previous value is adopted as the inside air temperature. In the following step S150, the previous value is adopted as the outside air temperature, and the process returns to step 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 step S140 of the additional processing, and proceeds to step S155. After the time t16, since the actual suction port mode is the inside air circulation mode, the process proceeds from step S155 to step S160, the sensor value is adopted as the inside air temperature, the previous value is adopted as the outside air temperature in the subsequent step S165, and the process proceeds to step S140. Return. The repetition of steps S140, S155, S160, and S165 is continued until the actual suction port mode is switched after time t16. 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.

[Case 2] When the outside air introduction mode is the basis Next, as Case 2, the suction port mode determined based on the target outlet temperature TAO is changed from the inside air circulation mode to the outside air introduction mode, and then outside air introduction is performed. A case where the mode continues will be described. 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 realizes the inlet mode (inside air circulation mode) based on the target outlet temperature TAO in step S71 in the process of FIG. 8, and the duration is within T1 in step S72. The process of determining that it is and returning to step 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 time t21. First, in step S140, it is determined that the duration exceeds T3, and in subsequent step 155, it is determined that the internal air circulation mode is set. In the subsequent step S160, the sensor value is adopted as the inside air temperature, and in the subsequent step S165, the previous value is adopted as the outside air temperature, and the process returns to step S140.

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

  In that case, between time t21 and time T1, the control circuit 31 implement | achieves the suction inlet mode (outside air introduction mode) based on the target blowing temperature TAO by step S71, and determines with continuing time being less than T1 by step S72. Then, the process of returning to step S71 is repeated. Therefore, the actual suction port mode is the outside air introduction mode from time t21 to time T1.

  Further, during the period from time t21 to time T3, the control circuit 31 repeats the following processing in the additional processing. First, in step S140, it is determined that the duration is within T3. In the following step 145, the previous value is adopted as the inside air temperature. In the following step S150, the previous value is adopted as the outside air temperature, and the process returns to step 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 step S140 of the additional processing, and proceeds to step S155. After the time t22, since the actual suction port mode is the outside air introduction mode, the process proceeds from step S155 to step S170, the previous value is adopted as the inside air temperature, the sensor value is adopted as the outside air temperature in the subsequent step S175, and the process proceeds to step S140. Return.

  The repetition of steps S140, S155, S170, and S175 continues 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 step S72 of FIG. 8 that the duration is T1 or more, and in step S73, the suction port mode is changed from the outside air introduction mode to the inside air. Switch to circulation mode. Thereafter, until time T2 has elapsed from time t23, it is determined in step S74 that the duration is T2 or less. As a result, until the time T2 elapses from the time point t23, the actual suction port mode is temporarily set to the inside air even though the suction port mode based on the target blowing temperature TAO is the outside air introduction mode. It becomes a circulation 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 inside air circulation mode at the time point t23. First, in step S140, it is determined that the duration is within T3. In the following step 145, the previous value is adopted as the inside air temperature. In the following step S150, the previous value is adopted as the outside air temperature, and the process returns to step 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) has elapsed from time t23 and time t24 has elapsed, the control circuit 31 determines in step S140 of the additional processing that the duration has exceeded T3 and proceeds to step S155. Become. After time t24, since the actual suction port mode is the inside air circulation mode, the process proceeds from step S155 to step S160, where the sensor value is adopted as the inside air temperature, and in the subsequent step S165, the previous value is adopted as the outside air temperature. Return.

  The repetition of steps S140, S155, S160, and S165 is continued until time t25 after the actual inlet mode is switched after time t24. 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 elapses from the time t23 and reaches the time t25, the control circuit 31 determines in step S74 of FIG. 8 that the duration has become T2 or more, returns to step S71, and the target outlet temperature TAO Realizes the inlet mode based on 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 implement | achieves the suction inlet mode (outside air introduction mode) based on the target blowing temperature TAO by step S71, and determines with continuing time being less than T1 by step S72. The process of returning to step S71 is repeated. Therefore, the actual suction port mode is the outside air introduction mode from time t25 to time T1.

  Further, during the period from time t25 to time T3, the control circuit 31 repeats the following processing in the additional processing. First, in step S140, it is determined that the duration is within T3. In the following step 145, the previous value is adopted as the inside air temperature. In the following step S150, the previous value is adopted as the outside air temperature, and the process returns to step 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 the time T3 elapses from the time t25 and reaches the time t26, the control circuit 31 determines in step S140 of the additional processing that the duration exceeds T3 and proceeds to step S155. After time t26, since the actual suction port mode is the outside air introduction mode, the process proceeds from step S155 to step S170, the previous value is adopted as the inside air temperature, the sensor value is adopted as the outside air temperature in the subsequent step S175, and the process proceeds to step S140. Return. The repetition of steps 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 downstream of the inside / outside air switching door 12 and upstream of the heat exchangers 16 and 17 in the ventilation path, the inside air temperature sensor 39 detects both the inside air temperature and the outside air temperature. It can be used as a dual-purpose sensor. The reason why the inside air temperature sensor 39 is arranged upstream of the heat exchangers 16 and 17 is to detect the value before the air introduced into the inside / outside air switching box 11 changes in temperature by the ventilation path heat exchangers 16 and 17. Because.

  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 step 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 of the present invention will be described. This embodiment adds the change demonstrated below with respect to 1st-3rd embodiment.

  In the present 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. By executing a predetermined program, the external communication terminal 3 has operation units 3b, 3c, and 3d for operating the vehicle air conditioner 1 on its own display screen 3a as illustrated in FIG. While displaying, the information display parts 3e and 3f which alert | report the operating state of the vehicle air conditioner 1 are displayed.

  In the example of FIG. 13, as the operation unit, the air flow rate changeover switches 3 b and 3 c for manually increasing and decreasing the air flow rate of the blower fan 15, and the blow mode switching switch 36 for manually setting the blow mode to be switched. Is displayed. Which of the plurality of functions of the vehicle air conditioner 1 is 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. is there.

  Further, in the example of FIG. 13, as the information display unit, a blower level display unit 3 f that notifies a blower level that indicates the air flow rate of the blower fan 15 and a set temperature display unit 3 e that notifies the set temperature Tset are displayed. . Which of the operating states of the plurality of operating states of the vehicle air conditioner 1 is to be displayed on the external communication terminal 3 is arbitrarily determined by the user of the external communication terminal 3 operating the external communication terminal 3. Can be changed.

  In order to realize such a function, the external communication terminal 3 executes the above-described program, thereby sending an operation signal corresponding to a user operation to the operation units 3b to 3d via the in-vehicle communication interface 40. Send to. And the control circuit 31 changes the control content (the target blowing temperature TAO etc.) of the vehicle air conditioner 1 so that the operation | movement according to the operation signal received from the external communication terminal 3 via the in-vehicle communication interface 40 is implement | achieved. .

  In addition, the control circuit 31 transmits information (setting temperature Tset, inside air temperature Tr, outside air temperature Tam, blower level, blow-out mode, air inlet mode, etc.) indicating the operating state of the vehicle air conditioner 1 via the in-vehicle communication interface 40. To the external communication terminal 3. And the external communication terminal 3 selects required information from the information which shows the operation state received from the control circuit 31 via the in-vehicle communication interface 40, and displays it on the display screen 3a.

  In addition, 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) 33 ′ 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 (in-vehicle panel) 33 'has only three operation switches 33a, 33b, and 33c as buttons that can be operated by the occupant. The AUTO switch 33a is a switch having the same function as the AUTO switch 34 of the first to third embodiments, and is a switch for setting whether to execute automatic air conditioning control or manual air conditioning control. The differential switch 34 is a switch for setting whether the blowing mode is set to the defroster mode or the other mode. When the differential switch 34 is operated, the control circuit 31 responds to the operation by manual air conditioning control. The air conditioning unit 10 is controlled so that the blowing mode is realized. The temperature setting switch 33c is a switch having the same function as the temperature setting switch 38 of the first to third embodiments.

  As described above, the air conditioning operation unit 33 ′ of the present embodiment does not have the inside / outside air switch 35, does not have the blowing mode switch 36 that can arbitrarily switch the blowing mode, and has the air volume switch 37. And no pollen mode switch. Since it is in this way, the structure of the vehicle air conditioner 1 in a 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 to 33c having the same function as that of the air conditioning operation unit 33 '.

  In each of the above embodiments, the control circuit 31 functions as an example of an acquisition unit by executing Step S30, and functions as an example of an air conditioning control unit by executing Steps S40 to S90.

(Other embodiments)
In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. 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.

(Modification 1)
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, this need not always be the case, and the vehicle air conditioner 1 may include any one of an outside air temperature sensor and a solar radiation amount sensor installed in the vehicle.

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

(Modification 2)
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, using the external information other than "external information acquired last", that is, "external information of the last successful reception among previous times more than the previous time in repeated reception", the target blowing temperature is used. TAO is calculated. 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.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Outside vehicle server 3 External communication terminal (mobile communication device)
3x Temperature sensor 12 Inside / outside air switching door 16 Evaporator 17 Heater core 39 Inside temperature sensor 40 In-vehicle communication interface

Claims (5)

An acquisition means (S30) for acquiring an inside air temperature that is a temperature inside a 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;
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. Air conditioning control means (S40 to S90),
The acquisition means acquires the inside air temperature using an inside air temperature sensor (39) mounted on the vehicle, and at least one of the outside air temperature and the amount of solar radiation is an outside server located outside the vehicle. A vehicle air conditioner obtained from (2).   The acquisition means repeatedly acquires external information including the at least one amount from the outside server, sets the at least one amount included in each acquired external information as an amount for calculating the index, and repeatedly When the external information could not be acquired from the outside server in the previous round in the above, the air conditioning control means uses the at least one amount included in the external information acquired in the past from the previous round off the server outside the vehicle. The vehicle air conditioner according to claim 1, wherein the vehicle air conditioner is set as an amount for calculating the index. A communication interface (40) for connecting to a portable communication device (3) capable of communicating with the outside server;
The acquisition unit acquires the at least one quantity from the server outside the vehicle via the portable communication device using the communication interface,
Furthermore, the acquisition means acquires a detection value of a temperature sensor (3x) mounted on the portable communication device based on the occurrence of an abnormality in the inside air temperature sensor, and sets it to the inside air temperature. The vehicle air conditioner according to claim 1 or 2. An air conditioning unit (10) that forms a ventilation path through which air is blown into the passenger compartment of the vehicle;
The inside air temperature sensor is disposed downstream of the inside / outside air switching door (12) for switching between inside air and outside air and upstream of the heat exchanger (16, 17) in the ventilation path.
The acquisition unit acquires the detection value of the internal air temperature sensor as the external air temperature when the internal / external air mode of the vehicle air conditioner is an external air mode. The vehicle air conditioner described. A communication interface (40) for connection with a portable communication device (3) that is carried by a passenger of the vehicle and can communicate with the server outside the vehicle;
The acquisition unit acquires the at least one quantity from the server outside the vehicle via the portable communication device using the communication interface,
The vehicle air conditioner according to any one of claims 1 to 4, wherein the air conditioning control unit changes the control content based on a user operation on the portable communication device.

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