JP2004338673A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle capable of preventing a battery from being exhausted without impairing comfortableness when a user gets in. <P>SOLUTION: The air conditioner for a vehicle has an air conditioner control unit 7 which selects and drives one mode from either an air conditioning mode or a ventilation mode in parking, corresponding to a thermal load state detected by a solar radiation sensor 73 and an inner temperature sensor 71, and has a battery charging quantity sensor S for detecting a battery B charging quantity. The air conditioning unit 7 selects one mode from either the air conditioning mode or the ventilation mode, corresponding to the detected thermal load state and the battery B charging quantity. Selection of one mode is executed from either the air conditioning mode or the ventilation mode in view of the battery B charging quantity as well as the thermal load state in a cabin, thereby suppressing power consumption by selecting the ventilation mode in case of a small battery B charging quantity. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle air conditioner that selects and operates an air conditioning mode or a ventilation mode when a vehicle is parked.
[0002]
[Prior art]
When the vehicle is parked in the hot summer weather, the air temperature in the passenger compartment rises due to the influence of the outside air and solar radiation and cannot be maintained at an appropriate temperature. Even if the temperature is adjusted, it takes a long time until the air temperature in the passenger compartment becomes appropriate.
[0003]
Therefore, when the user gets into the vehicle interior, in order to keep the air temperature in the vehicle interior at an appropriate temperature, both an internal air temperature sensor that detects the vehicle interior temperature and an external air temperature sensor that detects the outside air temperature are used. 2. Description of the Related Art A vehicle air conditioner that ventilates vehicle interior air or cools vehicle interior air according to a sensor output has been proposed (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-6-48167
[0005]
[Problems to be solved by the invention]
However, in the above-described vehicle air conditioner, when an electric compressor operated by being supplied with power from a vehicle-mounted battery is used to cool the vehicle interior air, the charged capacity (remaining capacity) of the vehicle-mounted battery is insufficient. Regardless, if the electric compressor is operated while the vehicle is parked, there is a possibility that the battery runs down due to power consumption of the electric compressor.
[0006]
In view of the above, it is an object of the present invention to provide an air conditioner for a vehicle in which the running out of the battery is suppressed without impairing the comfort when the user gets on the vehicle.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, electric power is supplied from an on-vehicle battery (B), and the electric compressor (41) compresses refrigerant and is blown into a vehicle compartment. In accordance with a cooling heat exchanger (45) for cooling the blast air with a refrigerant, heat load sensors (71, 73) for detecting a heat load state in the vehicle cabin, and a heat load state detected by the heat load sensor, A control means (7) for selecting and operating one of the air conditioning mode for adjusting the air temperature in the vehicle compartment by the blown air to be cooled and the ventilation mode for ventilating the vehicle interior air when the vehicle is parked; An air conditioner for a vehicle, comprising a remaining capacity detecting means (S) for detecting a remaining capacity of a vehicle-mounted battery, wherein a control means controls a heat load state detected by a heat load sensor and a remaining capacity detected by the remaining capacity detecting means. According to the sky And selects one mode of the mode and ventilation mode.
[0008]
This selects one of the air conditioning mode and the ventilation mode in consideration of not only the thermal load state in the vehicle compartment but also the remaining capacity of the on-board battery, so when the remaining capacity of the on-board battery is small, select the ventilation mode. It becomes possible to do. In this ventilation mode, there is no need to operate the electric compressor, and power consumption can be suppressed as compared with the operation in the air conditioning mode. Therefore, it is possible to prevent the battery from running down without impairing the comfort when the user gets on the vehicle.
[0009]
According to the second aspect of the invention, when the control unit determines that the remaining capacity detected by the remaining capacity detection unit is less than the predetermined value during the operation in the air conditioning mode, the control unit switches from the air conditioning mode to the ventilation mode and operates. It is characterized by the following.
[0010]
Thus, when the remaining capacity of the vehicle-mounted battery decreases during the operation in the air-conditioning mode, the mode is switched to the ventilation mode, the power consumption can be reduced, and the running out of the battery can be suppressed.
[0011]
Incidentally, reference numerals in parentheses of the above-mentioned units are examples showing the correspondence with specific units described in the embodiments described later.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
(1st Embodiment)
1 and 2 show an embodiment in which the air conditioner of the present invention is applied to a hybrid vehicle.
[0013]
First, a hybrid vehicle includes a driving engine (internal combustion engine) using gasoline as a fuel, a motor generator (M / G) having a driving motor function and a generator function, and a motor generator (M / G) and an air conditioner. A battery B that supplies power to various electronic devices such as devices is provided.
[0014]
Here, the motor generator (M / G) functions as a motor that generates power when supplied with power from the battery B, and functions as a generator that generates power when driven by an engine or the like. is there.
[0015]
Next, the air conditioner will be described. As shown in FIGS. 1 and 2, the air conditioner includes an air conditioner unit 6 for air-conditioning the vehicle interior, and an air conditioner control device 7 (FIG. 2) for controlling devices constituting the air conditioner unit 6. In this example, the air conditioner is an automatic air conditioner that automatically controls the temperature in the passenger compartment to an arbitrarily set temperature.
[0016]
The air-conditioning unit 6 is arranged on the front side in the vehicle interior and forms an air passage for guiding conditioned air into the vehicle interior, a centrifugal blower 30 for sending air in the air-conditioning duct 10, and an air-conditioning duct 10. And a cooling water circuit 50 for heating the air flowing in the air-conditioning duct 10.
[0017]
The inside / outside air switching box provided on the most upstream side of the airflow of the air conditioning duct 10 has an inside air suction port 11 and an outside air suction port 12, and these suction ports 11, 12 are opened and closed by an inside / outside air switching damper 13. The inside / outside air switching damper 13 is driven by an actuator 14 such as a servomotor (see FIG. 2).
[0018]
A defroster opening, a face opening, and a foot opening are formed at the most downstream side of the airflow of the air conditioning duct 10. A defroster duct 15 is connected to the defroster opening, and a defroster outlet 18 for blowing conditioned air toward the inner surface of the windshield of the vehicle is opened at the most downstream end of the defroster duct 15.
[0019]
A face duct 16 is connected to the face opening, and a face outlet 19 for blowing conditioned air toward the upper body of the occupant is opened at the most downstream end of the face duct 16. Further, a foot duct 17 is connected to the foot opening, and a foot outlet 20 for blowing conditioned air toward the feet of the occupant is opened at the most downstream end of the foot duct 17.
[0020]
Two outlet switching dampers 21 are rotatably mounted inside each outlet. These air outlet switching dampers 21 are driven by actuators 22 (see FIG. 2) such as servo motors, respectively, to set the air outlet mode to any one of a face mode, a bi-level mode, a foot mode, a foot differential mode, and a defroster mode. Switch to crab.
[0021]
The electric blower 30 includes a centrifugal fan 31 rotatably housed in a scroll case integrally formed with the air conditioning duct 10, and a blower motor 32 for rotating the centrifugal fan 31. The rotation speed (the rotation speed of the centrifugal fan 31) of the blower motor 32 is controlled based on the blower terminal voltage applied via the blower drive circuit.
[0022]
The refrigerating cycle 40 includes an electric compressor 41 including a compression mechanism for compressing the refrigerant and a motor for driving the compression mechanism by receiving electric power from the battery B. The refrigerant is condensed and liquefied by exchanging heat between the compressed refrigerant and the outside air. A condenser 42, a gas-liquid separator 43 that separates the condensed and liquefied refrigerant into gas and liquid and flows only the liquid refrigerant downstream, an expansion valve 44 that decompresses and expands the liquid refrigerant, and exchanges heat between the decompressed and expanded refrigerant and the conditioned air. It comprises an evaporator 45 for cooling the conditioned air, a cooling fan 46 for blowing outside air to the condenser 42, and a refrigerant pipe for connecting these. The rotation of the motor of the electric compressor 41 is controlled based on a control signal input via a drive circuit.
[0023]
In the cooling water circuit 50, a heater core 51 is disposed in a circuit for circulating cooling water (warm water) of the engine 1 by a water pump (not shown). The heater core 51 exchanges heat between engine cooling water and conditioned air to supply conditioned air. Heat.
[0024]
The heater core 51 is disposed downstream of the evaporator 45 in the air conditioning duct 10 so as to partially block an air passage. An air mix damper 52 is rotatably mounted on the upstream side of the heater core 51, and the air mix damper 52 is driven by an actuator 53 such as a servomotor (see FIG. 2) to generate hot air passing through the heater core 51. The temperature of the air blown into the vehicle cabin is adjusted by adjusting the ratio of the cool air passing through the bypass passage 51a of the heater core 51 to the cool air.
[0025]
Next, the configuration of the control system of the air conditioner will be described with reference to FIG. A switch signal from each switch on a control panel provided on the front of the vehicle compartment and a sensor signal from each sensor are input to the air conditioner control device 7. Here, each switch on the control panel includes a suction port changeover switch for switching a suction port mode, a temperature setting lever for setting a temperature in a vehicle cabin to a desired temperature, and a switchover of a blowing amount of the centrifugal fan 31. For switching the parking air-conditioning function for controlling the air-conditioning of the vehicle interior during parking as will be described later, an input switch for inputting the user's boarding time, and the like.
[0026]
As shown in FIG. 2, the sensors are an internal air temperature sensor 71 for detecting the air temperature in the vehicle interior, an external air temperature sensor 72 for detecting the air temperature outside the vehicle interior, and detecting the amount of solar radiation radiated into the vehicle interior. There is a solar radiation sensor 73, an evaporator air temperature sensor 75 for detecting the temperature of air blown from the evaporator 45 (hereinafter referred to as evaporator air temperature), a battery charge sensor S, and the like. Among them, thermistors are used as the inside air temperature sensor 71, the outside air temperature sensor 72, and the evaporator outlet air temperature sensor 75. As the battery charge sensor S, for example, a voltmeter that detects the positive terminal voltage of the battery B to detect the charge of the battery B is used.
[0027]
A microcomputer including a CPU, a ROM, a RAM, and the like (not shown) is provided inside the air conditioner control device 7, and sensor signals from the sensors 71 to 73 and 75 are transmitted to an A / C by an input circuit (not shown) in the air conditioner control device 7. It is configured to be input to the microcomputer after the / D conversion. Further, the air conditioner control device 7 operates by being supplied with DC power directly from the battery B.
[0028]
Next, a control process of the air conditioner control device 7 of the present embodiment will be described with reference to FIGS. 3 and 4 are flowcharts showing basic air conditioning control processing by the air conditioner control device 7.
[0029]
First, when the ignition switch IG is turned off, the air conditioner control device 7 starts executing a computer program stored in the memory in advance according to the flowcharts shown in FIGS.
[0030]
Here, prior to the user getting off the vehicle, the parking air-conditioning function is reserved by each switch on the control panel, and when the user enters the boarding time, the air-conditioning control device 7 responds to the switch signal from each switch. Then, it is determined that the user has requested the driving of the parking air conditioning function, and the boarding time of the user is recognized (steps H001, 100).
[0031]
Next, according to the air temperature in the vehicle cabin detected by the internal air temperature sensor 71 (hereinafter referred to as the internal air temperature TR) and the amount of solar radiation detected by the solar radiation sensor 73 (hereinafter referred to as the solar radiation amount TS), as follows. Next, a mode to be operated (hereinafter, referred to as an operation mode) is provisionally determined.
[0032]
Specifically, based on the inside air temperature TR, the amount of solar radiation TS, and the characteristic map of FIG. 5 previously stored in the memory (this is a characteristic diagram showing the relationship between the inside air temperature TR and the amount of solar radiation TS), FIG. In step 5, it is determined which of the A zone, the B zone, and the C zone the thermal load state in the vehicle compartment corresponds to (steps 200, H002, and H003).
[0033]
In order to perform control in accordance with the thermal sensation of the human body, as the vehicle interior temperatures Ta, Tb, and Tc in FIG. 5, for example, Ta = 60 (° C.), Tb = 40 ° C., Tc = 30 ° C. As α1 and α2, for example, it is preferable to use values of about α1 = 600 kW / m2 and α2 = 300 kW / m2.
[0034]
Here, when it is determined that the heat load state is the C zone, it is determined that neither the air conditioning nor the ventilation is required, and the process returns to step 200, and the B heat zone having the heat load state larger than the C zone (this is the B zone larger than the C zone). (Indicating a state in which the inside air temperature TR is high and the amount of solar radiation TS is large), the ventilation mode is temporarily determined as the operation mode (step 302).
[0035]
Accordingly, when the positive electrode terminal voltage of the battery B detected by the battery charge sensor S is equal to or higher than the voltage value V2, it is determined that the charge amount of the battery B is equal to or higher than the charge amount W2. The operation of the provisionally determined ventilation mode is started (step 400). The specific control processing of the ventilation mode will be described later.
[0036]
Thereafter, as long as the state of charge is equal to or higher than the charge amount W2 and the inside air temperature TR is equal to or higher than the temperature Tc, the operation in the ventilation mode is continued until the scheduled boarding time is reached (steps H009, H011, and H013). When the inside air temperature TR becomes lower than the temperature Tc (step 700), the operation in the ventilation mode is temporarily stopped, and the process returns to step 200.
[0037]
In addition, when it is determined in step H003 that the heat load state in the vehicle compartment corresponds to the zone A having a higher heat load than the zone B, the air conditioning mode is provisionally determined as the operation mode (step 301). Accordingly, in step H004, if the positive terminal voltage of the battery B detected by the battery charge sensor S is less than the voltage value V2, it is determined that the charge amount of the battery B is less than the charge amount W2. The air conditioning control process is forcibly terminated.
[0038]
On the other hand, when the positive electrode terminal voltage of the battery B is equal to or higher than the voltage value V2, when the charge amount of the battery B is equal to or higher than the charge amount W2, the process further proceeds to step H006. It is determined whether the charge amount of B is a charge amount capable of reaching the air conditioning mode or a charge amount capable of reaching the ventilation mode (see FIG. 6).
[0039]
For example, when the positive terminal voltage of the battery B is lower than the voltage V1, it is determined that the charge amount of the battery B is lower than the charge amount W1, and the process proceeds to step 400. The voltage V1 is a voltage value larger than the voltage V2, and the charge amount W1 is a charge amount larger than the charge amount W2.
[0040]
On the other hand, when the positive terminal voltage of the battery B is equal to or higher than the voltage V1, it is determined that the charge amount of the battery B is equal to or higher than the charge amount W1, and the operation in the air-conditioning mode temporarily determined as described above is started ( Step 500). The specific control processing of the air conditioning mode will be described later.
[0041]
Thereafter, as long as the state of charge is equal to or more than the charge amount W1 and the inside air temperature TR is equal to or higher than the temperature Tc, the operation in the air-conditioning mode is continued until the scheduled riding time is reached (steps H007, H010, and H012).
[0042]
When it is determined in step H010 that the inside air temperature TR is lower than the temperature Tc, the operation in the air conditioning mode is temporarily stopped (step 600), and the process returns to step 200. Also, when it is determined in step H007 that the step charge amount is less than the charge amount W1, and in step H008 it is determined that the remaining time until the scheduled boarding time is shorter than X minutes (constant time), Move to step 400.
[0043]
Next, specific control processing of the ventilation mode and the air conditioning mode will be described.
[0044]
(Ventilation mode)
In this case, the air conditioner control device 7 closes the inside air suction port 11 and opens the outside air suction port 12 by driving the actuator 14 to rotate the damper 13. In addition, the actuator 22 in the face opening is driven to rotate the outlet switching damper 21 to open the face outlet 19.
[0045]
Thereafter, when a predetermined value that is predetermined as a blower terminal voltage is output to the blower driving circuit, the blower driving circuit rotates the blower motor 32 at a constant rotation speed. 31 is rotated.
[0046]
Along with this, by the rotation of the centrifugal fan 31, air is sucked in from the outside of the vehicle through the outside air suction port 12 and blown air is blown out toward the evaporator 45. Thereafter, the blown air passes through the evaporator 45 and the bypass passage 51a and is blown out of the face outlet 19 into the vehicle interior. Accordingly, the air in the vehicle compartment is blown out of the vehicle from the gap between the vehicles, so that the air in the vehicle compartment is ventilated. In the ventilation mode, all the blast air that passes through the evaporator 45 by the air mix damper 52 passes through the bypass passage 51a.
[0047]
(Air conditioning mode)
In this air-conditioning mode, first, a target outlet temperature TAO of air to be blown into the vehicle compartment is calculated based on the following equation (1) stored in a memory in advance.
[0048]
(Equation 1)
TAO = Kset × Tset−KR × TR−KAM × TAM−KS × TS + C
Here, Tset is the set temperature set by the temperature setting lever, TR is the inside air temperature detected by the inside air temperature sensor 71, TAM is the outside air temperature detected by the outside air temperature sensor 72, and TS is the sunshine sensor 73. It is the amount of solar radiation. Kset, KR, KAM, and KS are gains, and C is a correction constant.
[0049]
Subsequently, the suction port mode corresponding to the target outlet temperature TAO is determined from the characteristic diagram stored in the ROM in advance. Specifically, when the target outlet temperature TAO is low, the inside air circulation mode is selected, and when the target outlet temperature TAO is high, the outside air introduction mode is selected.
[0050]
Here, in the outside air introduction mode, the actuator 14 is driven to close the inside air suction port 11 and open the outside air suction port 12. In the inside air circulation mode, the actuator 14 is driven to open the inside air suction port 11 and close the outside air suction port 12. When such an inlet mode is determined, the actuator 14 is driven according to the determined inlet mode.
[0051]
Subsequently, a blower voltage (voltage applied to the blower motor 32) corresponding to the target blowout temperature TAO is determined from a characteristic diagram stored in the ROM in advance. Specifically, the blower voltage is increased as the target blowout temperature TAO is lower or higher (air volume is larger), and the blower voltage is lowered as the target blowout temperature TAO is closer to the set temperature.
[0052]
When the blower voltage is determined in this way, a control signal indicating the blower voltage is output to the blower drive circuit, and the blower drive circuit rotates the blower motor 32 based on the control signal. Along with this, the centrifugal fan 31 blows out the blowing air.
[0053]
Subsequently, the outlet mode corresponding to the target outlet temperature TAO is determined from the characteristic diagram stored in the ROM in advance. Specifically, when the target outlet temperature TAO is low, the face mode is selected, and as the target outlet temperature TAO increases, the bi-level mode and then the foot mode are selected.
[0054]
Here, in the foot mode, only the foot opening is opened by the outlet switching damper 21. In the face mode, only the face opening is opened by the outlet switching damper 21, whereas in the bilevel mode, each of the foot opening and the face opening is opened by each outlet switching damper 21. When the outlet mode is determined in this way, the corresponding actuator 22 is driven according to the determined outlet mode.
[0055]
Subsequently, the number of rotations of the motor of the electric compressor 41 is controlled in accordance with the evaporator air temperature detected by the evaporator air temperature sensor 75. Accordingly, the amount of refrigerant discharged from the compression mechanism of the electric compressor 41 is controlled in accordance with the evaporator air temperature.
[0056]
Thereby, the amount of the refrigerant flowing through the evaporator 45 is controlled such that the temperature of the air blown from the evaporator approaches the target temperature. Along with this, the blast air blown from the centrifugal fan 31 is cooled by the evaporator 45, and the cool blast air passes through the bypass passage 51a and is blown into the vehicle compartment from the corresponding outlet. For this reason, the air temperature in the vehicle cabin is adjusted by the cool air.
[0057]
Hereinafter, the operation and effect of the present embodiment will be described. In the present embodiment, an electric compressor 41 that is supplied with power from the battery B and compresses the refrigerant, an evaporator 45 that cools the blast air blown into the vehicle interior with the refrigerant, and an internal air temperature, According to the solar radiation sensor 73 and the internal temperature sensor 71 for detecting the amount of solar radiation, and the heat load state detected by the solar radiation sensor 73 and the internal temperature sensor 71, one of the air conditioning mode and the ventilation mode is set to the vehicle parking mode. An air conditioner for a vehicle having an air conditioner control device 7 that is selected and operated occasionally, and has a battery charge amount sensor S for detecting a charge amount (remaining capacity) of a battery B. One of the air conditioning mode and the ventilation mode is selected according to the heat load state and the charge amount of the battery B.
[0058]
With this, one of the air conditioning mode and the ventilation mode is selected in consideration of not only the heat load state in the vehicle compartment but also the charge amount of the battery B. Therefore, when the charge amount of the battery B is small, the ventilation mode is set. It becomes possible to choose. In this ventilation mode, there is no need to operate the electric compressor 41, and power consumption can be suppressed as compared with the operation in the air conditioning mode. Therefore, it is possible to prevent the battery from running down without impairing the comfort when the user gets on the vehicle.
[0059]
When it is determined that the charge amount of the battery B is less than the predetermined value during the operation in the air conditioning mode, the operation is switched from the air conditioning mode to the ventilation mode. For this reason, even if the charge amount of the battery B decreases during the operation in the air-conditioning mode, the power consumption can be reduced, and the running out of the battery can be suppressed.
[0060]
(Other embodiments)
In the above-described embodiment, an example has been described in which a hybrid vehicle is applied as a vehicle. Alternatively, an electric vehicle may be applied as a vehicle.
[0061]
In the above-described embodiment, an example in which a voltmeter that detects the voltage of the positive electrode terminal of the battery B is used as the battery charge amount sensor S that detects the charge amount of the battery B has been described. Using a voltmeter that detects the voltage of the positive terminal and an ammeter that detects the current flowing through the positive terminal, the amount of charge may be obtained from the detected voltage and current.
[0062]
In the above-described embodiment, an example in which the air-conditioning control device 7 determines that the user has requested the driving of the parking air-conditioning function when the reservation of the driving of the parking air-conditioning function and the ride time of the user are input. Alternatively, when a request signal (including the user's boarding time) from a mobile wireless terminal such as a mobile phone is received via the base station of the mobile communication carrier, the user operates the parking air conditioning function. May be determined to have been requested.
[0063]
Instead, when the in-vehicle wireless device receives a request signal (including the user's boarding time) transmitted from the mobile terminal using wireless communication of the mobile terminal performing remote operation, the parking air-conditioning function is transmitted from the user. It may be determined that the operation of is required.
[0064]
In the above-described embodiment, an example in which the air conditioner control device 7 selects one of the air conditioning mode and the ventilation mode and operates immediately after determining that the user has requested the operation of the parking air conditioning function has been requested. Although shown, it is also possible to operate one of the air-conditioning mode and the ventilation mode after a certain period of time after determining that the user has requested the operation of the parking air-conditioning function.
[0065]
In the above-described embodiment, an example in which a thermistor is used as the internal temperature sensor 71 has been described. Alternatively, if the indoor temperature can be detected, infrared rays radiated from a temperature detection target in the vehicle cabin can be received. An IR sensor for detecting the room temperature may be used.
[0066]
Instead of this, the evaporator air temperature sensor 75 for detecting the temperature of the evaporator air blown out from the evaporator 45 may be used as the internal air temperature sensor 71.
[0067]
In this case, when the inside air circulation mode is selected and the blower 30 is rotated for a certain period of time to take the air in the passenger compartment into the air conditioner unit 6, the evaporator blow-out air temperature sensor 75 detects the evaporation. The temperature of the air blown from the vessel is used as the inside air temperature.
[0068]
In the above-described embodiment, an example has been described in which the vehicle interior heat load state is specified based on the vehicle interior air temperature detected by the internal air temperature sensor 71 and the solar radiation amount detected by the solar radiation sensor 73. Instead of this, the vehicle interior heat load state may be specified only by the vehicle interior air temperature detected by the internal temperature sensor 71.
[0069]
In order to specify the heat load condition in the vehicle interior, the blower 30 is rotated for a certain period of time in the outside air introduction mode, air outside the vehicle interior is taken into the air conditioner unit 6, and detected by the evaporator air temperature sensor 75. The temperature of the evaporator air blown out may be regarded as the outside air temperature, and the estimated outside air temperature may be used as a substitute for the vehicle interior temperature, and a map may be created with the amount of solar radiation as shown in FIG.
[0070]
In the above-described embodiment, the window and the sunroof are controlled based on the closed state at the time of the ventilation mode / air-conditioning mode operation. However, the present invention is not limited to this. It may be opened and closed by a minute opening. Further, a control may be adopted in which rain is judged by a rain sensor and the window is not opened / closed in rainy weather.
[0071]
In the above-described embodiment, the content of the ventilation / air-conditioning instruction is not limited to the automatic control combining the ventilation mode / air-conditioning mode as described above, and may be selected such as only the ventilation mode or only the air-conditioning mode according to the passenger's preference. It may be possible. Here, even if the control is performed only in the air-conditioning mode, the control may be shifted to the air-conditioning control after the operation of only the instantaneous ventilation. Furthermore, ventilation (blower fan operation time) and air conditioning (electric compressor operation time) may be individually designated.
[0072]
In the embodiment of the present invention, a solar battery integrated with a sunroof or separately mounted on a vehicle may be used as the battery B.
[0073]
In practicing the present invention, a scent may be blown out of the vehicle interior purifying device or the like into the vehicle compartment immediately before the occupant enters the vehicle in order to improve comfort when the user gets into the vehicle. Here, “before boarding” means a certain time before the boarding scheduled time (for example, one minute before).
[0074]
Alternatively, when the approach of an occupant is detected by receiving an e-mail from a mobile terminal or a signal transmitted from a smart key, a mobile terminal with a GPS, or the like, the determination may be made as “immediately before the user gets in”.
[0075]
In the above-described embodiment, an example of the vehicle equipped with the electric compressor 41 has been described. However, as the compressor, a “2 way compressor” that is driven by combining driving from an engine via belt driving and driving from an electric motor is used. It does not matter.
[0076]
In the above-described embodiment, in order to identify the thermal load state in the vehicle interior, the vehicle interior temperatures Ta, Tb, and Tc in the characteristic map of FIG. 5 are, for example, Ta = 60 (° C.), Tb = 40 ° C., and Tc. = 30 ° C., and the solar radiation amounts α1 and α2 use, for example, values of about α1 = 600 kW / m2 and α2 = 300 kW / m2. However, the present invention is not limited to this, and appropriate data may be used. .
[Brief description of the drawings]
FIG. 1 is a schematic view showing one embodiment of a vehicle air conditioner of the present invention.
FIG. 2 is a schematic diagram showing a control system of the vehicle air conditioner of FIG.
FIG. 3 is a flowchart showing a part of a process of the air conditioner control device of FIG. 1;
FIG. 4 is a flowchart showing the rest of the process of the air conditioner control device of FIG. 1;
FIG. 5 is a characteristic diagram for explaining the operation of the air conditioner control device of FIG. 1;
FIG. 6 is a characteristic diagram for explaining the operation of the air conditioner control device of FIG. 1;
[Explanation of symbols]
B: battery B, 73: solar radiation sensor, 71: internal temperature sensor,
7 ... Air conditioner control device, S ... Battery charge amount sensor.

Claims (2)

An electric compressor (41) that is supplied with power from the vehicle-mounted battery (B) and compresses the refrigerant;
A cooling heat exchanger (45) for cooling the blown air blown into the vehicle interior by the refrigerant;
Heat load sensors (71, 73) for detecting a heat load state in the vehicle interior;
According to the heat load state detected by the heat load sensor, the vehicle is parked in one of an air conditioning mode in which the air temperature in the vehicle compartment is adjusted by the cooled blast air and a ventilation mode in which the air in the vehicle compartment is ventilated. A vehicle air conditioner having a control means (7) that is selectively operated at times.
A remaining capacity detecting unit (S) for detecting a remaining capacity of the vehicle-mounted battery;
The vehicle, wherein the control means selects one of the air conditioning mode and the ventilation mode according to a heat load state detected by the heat load sensor and a remaining capacity detected by the remaining capacity detection means. Air conditioner. The control unit switches the operation mode from the air conditioning mode to the ventilation mode when it is determined that the remaining capacity detected by the remaining capacity detection unit is less than a predetermined value during the operation of the air conditioning mode. The vehicle air conditioner according to claim 1.

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