Patent Publication Number: US-2023150340-A1

Title: Vehicle power management system

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to Japanese Patent Application No. 2021-184466 filed on Nov. 12, 2021, incorporated herein by reference in its entirety. 
     BACKGROUND 
     1. Technical Field 
     The present specification discloses a vehicle power management system capable of managing a state of charge (SOC) of an on-board battery through control of an air conditioner during external power supply. 
     2. Description of Related Art 
     The air conditioner mounted on a vehicle is provided with a compressor for compressing a refrigerant. In a conventional on-board air conditioning system, the compressor is driven by an internal combustion engine. On the other hand, in a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a battery electric vehicle (BEV), and a fuel cell electric vehicle (FCEV), each of which has a rotating electric machine as a driving source, a large-capacity battery is mounted as a power source. Therefore, in each of these vehicles, an electric compressor driven by the power of the on-board battery may be used. 
     By using the electric compressor, for example, as in the conventional vehicle, it is not necessary to drive the internal combustion engine when an air conditioning function is used. Therefore, for example, even in an ignition-off state, which is a state in which a vehicle cannot travel, the air conditioning function can be used. 
     Further, the plug-in hybrid electric vehicle or the battery electric vehicle enables, in the above ignition-off state, external power supply in which the power of the on-board battery is supplied to an external electric device. The external power supply allows, for example, use of the electric device (for example, cooking appliances) at a campsite, an evacuation site, and the like. 
     When the external power supply and the air conditioning function are used at the same time, there is a possibility that the state of charge (SOC) indicating a charge state of the battery suddenly decreases. Therefore, for example, in Japanese Unexamined Patent Application Publication No. 2016-107910 (JP 2016-107910 A), an operation is controlled during the external power supply such that the air conditioner operates in a power saving mode. 
     SUMMARY 
     By the way, there is a possibility that comfort of an occupant deteriorates when an operation of an air conditioning function is uniformly restricted during external power supply. Therefore, the present specification discloses a vehicle power management system capable of improving the comfort of the occupant as compared with the conventional technique, regarding the air conditioning function during the external power supply. 
     A vehicle power management system disclosed in the present specification includes a battery installed in a vehicle, an air conditioner for a vehicle cabin, the air conditioner being driven by power of the battery, an external power supply device that enables external power supply in which the power of the battery is supplied to an external electric device, and a determination unit that determines whether an operation restriction of the air conditioner is executed during the external power supply. The determination unit determines that the operation restriction is executed when all of following four conditions are satisfied, regarding a cooling operation state of the air conditioner, as determination of whether the operation restriction is executed: (A-1) a target blowout temperature is less than a predetermined blowout threshold temperature during cooling; (A-2) an outside air temperature exceeds a predetermined outside air threshold temperature during cooling; (A-3) a refrigerant temperature after heat is exchanged with an air blown into the vehicle cabin exceeds a predetermined refrigerant threshold temperature during cooling; and (A-4) a blower air volume of the air conditioner exceeds a predetermined threshold air volume. 
     According to the above configuration, the operation restriction of the air conditioner is executed only in a so-called strong cooling state, which is when any of the conditions (A-1) to (A-4) of the target blowout temperature, the outside air temperature, the refrigerant temperature after the heat is exchanged with the air, and the blower air volume is satisfied. 
     A vehicle power management system disclosed in the present specification also includes a battery installed in a vehicle, an air conditioner for a vehicle cabin, the air conditioner being driven by power of the battery, an external power supply device that enables external power supply in which the power of the battery is supplied to an external electric device, and a determination unit that determines whether an operation restriction of the air conditioner is executed during the external power supply. The determination unit determines that the operation restriction is executed when all of following four conditions are satisfied, regarding a heating operation state of the air conditioner, as determination of whether the operation restriction is executed: (B-1) a target blowout temperature exceeds a predetermined blowout threshold temperature during heating; (B-2) an outside air temperature is less than a predetermined outside air threshold temperature during heating; (B-3) a refrigerant temperature after heat is exchanged with an air blown into the vehicle cabin is less than a predetermined refrigerant threshold temperature during heating; and (B-4) a blower air volume of the air conditioner exceeds a predetermined threshold air volume. 
     According to the above configuration, the operation restriction of the air conditioner is executed only in a so-called strong heating state, which is when any of the conditions (B-1) to (B-4) of the target blowout temperature, the outside air temperature, the refrigerant temperature after the heat is exchanged with the air, and the blower air volume is satisfied. 
     In the above configuration, the determination unit may determine whether the operation restriction is executed when a state of charge of the battery is less than a predetermined battery determination threshold. 
     According to the above configuration, it is possible to suppress an excessive decrease in the state of charge of the battery by execution of the operation restriction. 
     Further, in the above configuration, when the determination unit outputs determination for executing the operation restriction, the air conditioner may close an outside air introduction port for an entire period in which the operation restriction is executed. 
     According to the above configuration, an air conditioning operation is performed by inside air circulation for the entire period in which the operation restriction is executed. Circulating the heated or cooled inside air by the air conditioner compensates for reduced air conditioning capacity due to the operation restriction. 
     Further, in the above configuration, when the determination unit outputs determination for executing the operation restriction, the air conditioner may invalidate an outside air introduction command by an input operation from an air conditioning operation panel inside the vehicle for an entire period in which the operation restriction is executed. 
     According to the above configuration, when the outside air introduction command by an occupant inside the vehicle is invalidated, it is possible to maintain circulation of the inside air for the entire period in which the operation restriction is executed. 
     With the vehicle power management system according to the present specification, regarding the air conditioning function during the external power supply, it is possible to improve the comfort of the occupant as compared with the conventional technique. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Features, advantages, and technical and industrial significance of exemplary embodiments of the disclosure will be described below with reference to the accompanying drawings, in which like signs denote like elements, and wherein: 
         FIG.  1    is a diagram illustrating a configuration of a vehicle in which the vehicle power management system according to the present embodiment is mounted; 
         FIG.  2    is a diagram for explaining an external charging/power supply mechanism; 
         FIG.  3    is a diagram for explaining an air conditioner; 
         FIG.  4    is a diagram illustrating an air conditioning operation panel for operating the air conditioner; 
         FIG.  5    is a diagram illustrating a hardware configuration of an HV-ECU; 
         FIG.  6    is a diagram illustrating an execution availability determination flow for the operation restriction of the air conditioner; 
         FIG.  7    is a diagram illustrating a strong cooling determination flow (1/2) is a sub-process in the execution availability determination flow; 
         FIG.  8    is a diagram illustrating a strong cooling determination flow (2/2) is a sub-process in the execution availability determination flow; 
         FIG.  9    is a diagram illustrating a target blowout temperature map during cooling; 
         FIG.  10    is a diagram illustrating an outside air temperature map during cooling; 
         FIG.  11    is a diagram illustrating an evaporator outlet water temperature map during cooling; 
         FIG.  12    is a diagram illustrating a blower air volume map; 
         FIG.  13    is a diagram illustrating a strong heating determination flow (1/2) is a sub-process in the execution availability determination flow; 
         FIG.  14    is a diagram illustrating a strong heating determination flow (2/2) is a sub-process in the execution availability determination flow; 
         FIG.  15    is a diagram illustrating a target blowout temperature map at the time of heating; 
         FIG.  16    is a diagram illustrating an outside air temperature map during heating; 
         FIG.  17    is a diagram illustrating a condenser outlet water temperature map during heating; 
         FIG.  18    is a diagram illustrating a rotational speed limit map of the compressor and the blower as an example of the operation restriction control of the air conditioning apparatus; 
         FIG.  19    is a diagram illustrating an evaporator outlet water temperature limit map as an example of the operation restriction control of the air conditioning apparatus; 
         FIG.  20    is a diagram illustrating a condenser outlet water temperature limit map as an example of the operation restriction control of the air conditioning apparatus; 
         FIG.  21    is a diagram showing another example of an air conditioner in which a heater is used as a heating function; 
         FIG.  22    is a diagram illustrating a strong heating determination flow (1/2) in another example of an air conditioner; 
         FIG.  23    is a diagram illustrating a strong heating determination flow (2/2) in another example of an air conditioner; 
         FIG.  24    is a diagram illustrating a heater outlet water temperature map in another example of an air conditioner; 
         FIG.  25    is a diagram illustrating a heater outlet water temperature limit map in another example of an air conditioner. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
       FIG.  1    illustrates an overall configuration of a vehicle  100  including a vehicle power management system according to the present embodiment. The vehicle  100  includes, for example, an internal combustion engine  16  and a rotary electric machine MG 1 , MG 2  as a driving source. The vehicle  100  may be a plug-in hybrid electric vehicle (PHEV) capable of external charging and external power supply. The vehicle  100  includes an elevation and depression unit  12 , and an inverter  13 , and a power distribution mechanism  14 . 
     However, the vehicle  100  is not limited to a plug-in hybrid electric vehicle. In short, when the vehicle is not in operation (at the time of the ignition-off state), the vehicle  100 , both the air conditioning function and the external power supply may be a vehicle available. For example, the vehicle  100  includes a rotary electric machine as a driving source. The vehicle  100  may also be a hybrid electric vehicle (HEV), and a battery electric vehicle (BEV), comprising a battery  10  as a power source. The vehicle  100  also includes a current sensor  10 A, a voltage sensor  10 B, and a temperature sensor  10 C. 
     The battery  10  mounted on the vehicle  100  is composed of, for example, a nickel-metal hydride battery, a lithium-ion battery, and an all-solid-state battery. For example, the capacity of the battery  10  may be 5 kWh or more and 100 kWh or less. 
     As will be described in more detail below, the vehicular power management system according to the present embodiment is configured to include a battery  10 , an air conditioner  25 , an external charging/power supply device  15 , an HV-ECU  40 , and an air conditioning ECU  43 . 
     In the operation restriction executability determination flow shown in  FIG.  6   , which will be described later, HV-ECU  40  and the air-conditioning ECU  43  share and process the respective steps of the determination flow. Therefore, in the executability determination flow, both HV-ECU  40  and the air-conditioning ECU  43  collectively function as a determination unit. 
     &lt;External Charging/Power Supply&gt; 
     Referring to  FIGS.  1  and  2   , the external charging/power supply device  15  is configured to include an inlet  17 , a charger/discharger  20 , a power connector  70 , and a plug-in charge ECU  41 . 
     The vehicle  100  is capable of so-called plug-in charging, in which the battery  10  can be charged from a power supply outside the vehicle via an external charging/power supply device  15 . Referring to  FIG.  2   , the inlet  17  provided on the side surface of the vehicle  100  (may be front), by inserting the plug of the external power supply (not shown), it is possible to charge the battery  10 . Specifically, the AC power of the external power source is converted into DC power inverter built in the charger/discharger  20 , the battery  10  is charged. 
     Furthermore, the external charging/power supply device  15  supplies power of the battery  10  to the electric device  72  outside the vehicle, it is possible to external power supply. The plug of the power connector  70  is plugged into the inlet  17  upon external power supply. By inserting the power connector  70  into the inlet  17 , the plug-in charge ECU  41  recognizes that the latter of the external charging/external power supply has been selected. 
     The power connector  70 , an inlet (not shown) is provided, the plug  71  of the electric device  72  is inserted into the inlet. 
     When the electric device  72  is connected to the charger/discharger  20  via the power connector  70 , the charger/discharger  20  drives the built-in inverter to convert the DC power of the battery  10  into AC power. As a result, external power can be supplied while the battery  10  is converted into, for example, a 60 Hz AC100 V power source, which consumes up to 1500 W. 
     Aspects of power utilization of the battery  10  include the so-called EV power supply mode and the HV power supply mode. In the HV-fed mode, when the SOC of the battery  10  decreases, the internal combustion engine  16  (see  FIG.  1   ) is started and the rotating electric MG 2  is driven as a generator to charge the battery  10 . 
     On the other hand, in the EV power supply mode, the internal combustion engine  16  is not driven, power is supplied only by the power stored in the battery  10 . Further, when the SOC of the battery  10  decreases, the power supply is stopped to suppress deterioration of the battery  10  due to overdischarge. 
     For example, the EV feed mode is selected in areas with nighttime campsites or idling stop ordinances, and where the fuel of the vehicle  100  is less than or equal to a predetermined threshold amount. In addition, in a battery electric vehicle (BEV) in which an internal combustion engine is not mounted on the vehicle  100 , exclusively, the EV power supply mode is set. 
     &lt;Air Conditioner&gt; 
     Referring to  FIGS.  1  and  3   , the air conditioner  25  includes, as an electric device, a step-down DC/DC converter  18 , an inverter  19 , a compressor  33 , a blower motor  34 A, and an actuator  68 . Further, with reference to  FIG.  3   , the air conditioner  25 , as equipment provided on the flow path of the refrigerant in addition to the compressor  33 , the outdoor condenser  30 , the evaporator  31 , the indoor condenser  32 , the expansion valve  35  and  36 , the accumulator  37 , the solenoid valve  38 , and a check valve  39 . In addition, the air conditioner  25  includes, as a control system equipment, an air conditioning ECU  43  and the air conditioning operation panel  50 . 
     Referring to  FIG.  3   , the air conditioner  25  for the vehicle cabin is an air conditioner of the so-called heat pump type. Equipment of the air conditioner  25 , including a compressor  33 , a blower  34 , and an actuator  68  (see  FIG.  1   ), is driven by receiving power from the battery  10 . 
     As illustrated in  FIG.  3   , the blower  34  includes a blower motor  34 A and a blower fan  34 B. The blower motor  34 A may be, for example, a dc motor. The rotational speed of the blower motor  34 A increases as the applied voltage rises. The blower motor  34 A is powered from the battery  10  via step-down DC/DC converters  18 . Drive signal defining the on/off of the switching element of the step-down DC/DC converter  18  (e.g., PWM signal) is generated by the device control unit  43 A of the air conditioning ECU  43 . The step-down rate is determined based on the duty ratio in the drive signal to the step-down DC/DC converter  18 , the rotational speed of the blower motor  34 A and the blower fan  34 B is determined accordingly. 
     The compressor  33  is, for example, an electric type with a built-in motor, and power is supplied from the battery  10  via an inverter  19 , as illustrated in  FIG.  1   . Drive signal defining the on/off of the switching element of the inverter  19  (e.g., PWM signal) is generated by the device control unit  43 A of the air conditioning ECU  43 . The rotational speed of the compressor  33  is determined based on the duty ratio of the drive signal. 
     Conventionally, by the compressor  33  which has been driven by an internal combustion engine becomes an electric type such as a motor-driven type, a large power for obtaining the driving torque of the compressor  33  is required. For example, as an electric device high power is required in the vehicle  100 , a rotary electric machine MG 1 , MG 2  is a driving source, the compressor  33  consumes power of the second order. For example, while the power consumption of an audio or navigation system, etc. is in watts [W], the power consumption of the compressor  33  is in kilowatts [kW]. 
     The air conditioner  25 , the duct  60  for controlling the air flow (see  FIG.  3   ) is provided. The upstream end of the duct  60 , the inside air introduction port  61  and the outside air introduction port  62  is provided. The inside air introduction port  61  is disposed in the vehicle cabin. Outside air introduction port  62  is exposed to the outside of the vehicle. Mixing ratio of the inside air and outside air taken into the duct  60  is determined according to the set angle of the inside and outside air switching door  67 A. 
     Air taken in from at least one of the inside air introduction port  61  and the outside air introduction port  62  is sucked by the blower fan  34 B, and passes through the evaporator  31  via the air cleaner  66 . Furthermore, when the air mix door  67 B is blocking the indoor condenser  32  (during cooling), air is sent by bypassing this. Further, air is blown out into the vehicle cabin from at least one of the front defroster duct  63 , the face register  64 , and the foot register  65 . The blowout quantity from the front defroster duct  63 , the face register  64 , and the foot register  65  is determined according to the opening of the defroster door  67 C, the face door  67 D, and the foot door  67 E. 
     The inside and outside air switching door  67 A, the air mix door  67 B, the defroster door  67 C, the face door  67 D, and the foot door  67 E (illustrated as door  67  in  FIG.  1   ) are adjusted opening by an actuator  68  illustrated in  FIG.  1   . As will be described later, the device control unit  43 A of the air conditioning ECU  43  drives the actuator  68  to close the outside air introduction port  62  over the entire duration the operation restriction of the air conditioner  25  is executed. Thus, the air conditioning operation by the internal air circulation over the entire period of the operation restriction of the air conditioner  25  is performed. 
     Incidentally, the front defroster duct  63 , the face register  64 , and the temperature of the air conditioning air blown out from the foot register  65  is referred to as the blowout temperature. The target blowout temperature T AO , which will be described later, is a target value of this blowing temperature. 
     The details of operation of the heat pump type air conditioner  25  shall be known. For this reason, it will be briefly described here. When using the heating function of the air conditioner  25 , the air mix door  67 B is fully opened with respect to the indoor condenser  32 . At this time, the refrigerant flows through the circulation path between the compressor  33 , the indoor condenser  32 , the expansion valve  35 , the outdoor condenser  30 , the solenoid valve  38 , the accumulator  37 , and the compressor  33  in this order. 
     While the refrigerant flows through such a circulation path, air is sent from the blower  34  to the indoor condenser  32 . Air passing through the indoor condenser  32  (i.e. heat exchanged) becomes hot air, the front defroster duct  63 , the face register  64 , and air from at least one of the foot register  65  is blown into the vehicle cabin. 
     When using the cooling function of the air conditioner  25 , the air mix door  67 B is fully closed with respect to the indoor condenser  32 . At this time, the refrigerant flows through the circulation path between the compressor  33 , the indoor condenser  32 , the expansion valve  35 , the outdoor condenser  30 , the expansion valve  36 , the evaporator  31 , the accumulator  37 , and the compressor  33  in this order. 
     While the refrigerant flows through such a circulation path, air is sent from the blower  34  to the evaporator  31 . Air passing through the evaporator  31  (i.e., heat exchanged) becomes cold air, air is blown into the vehicle cabin from at least one of the front defroster duct  63 , the face register  64 , and the foot register  65 . 
     &lt;Air Conditioning Operation Panel&gt; 
     Referring to  FIG.  4   , the operating state of the air conditioner  25  is operated by the air conditioning operation panel  50 . For example, the air conditioning operation panel  50  is provided on the driver&#39;s side of the instrument panel. 
     The air conditioning operation panel  50  may be, for example, a touch panel in which an input unit and a display unit overlap with each other. The air conditioning operation panel  50 , the air volume operation button  51 A,  51 B, the temperature setting button  52 A,  52 B, the auto switch  53 , and the blower switch  54  is provided. Furthermore, the air conditioning operation panel  50 , the air conditioner switch  55 , the inside and outside air switching switch  56 , the display unit  57 , the defroster switch  58 A, the rear defogger switch  58 B, and the air outlet selection switch  59  is provided. The functions of these buttons and switches are known. Therefore, the description is omitted here as appropriate. 
     Signals by operating the various switches and buttons of the air conditioning operation panel  50  are transmitted to the air conditioning ECU  43  (air conditioning control unit, see  FIG.  1   ). Device control unit  43 A of the air conditioning ECU  43 , in accordance with the input content to the air conditioning operation panel  50 , to change the control content to the air conditioner  25 . 
     For example, when the inside and outside air switching switch  56  is depressed, the device control unit  43 A of the air conditioning ECU  43  is fully opened the inside air introduction port  61  by driving the actuator  68  (see  FIG.  3   ) (outside air introduction port  62  is fully closed). Further, when the inside and outside air switching switch  56  is depressed again, the device control unit  43 A of the air conditioning ECU  43 , the outside air introduction port  62  is fully opened by driving the actuator  68  (the inside air introduction port  61  is fully closed). 
     Incidentally, as described later, over the entire period in which the operation restriction for the air conditioner  25  is executed, the device control unit  43 A of the air conditioning ECU  43  invalidates the outside air introduction command by the input operation of the inside and outside air switching switch  56 . 
     &lt;Air Conditioning Control&gt; 
     Referring to  FIGS.  1 ,  3 , and  4   , the device control unit  43 A of the air conditioning ECU  43  receives the input or the like of the various temperature sensors and the air conditioning operation panel  50 , and controls the air conditioner  25 . The control object of the device control unit  43 A includes a compressor  33 , a blower  34 , and an actuator  68 . 
     For example, the actuator  68 , so that the air outlet selected by the air outlet selection switch  59  and the inside and outside air switching switch  56  of the air conditioning operation panel  50  is opened, the device control unit  43 A drives and controls the actuator  68 . 
     Further, the compressor  33  and the blower  34 , the rotational speed control via the PWM control to the inverter  19  and the step-down DC/DC converter  18  is performed. In setting the rotational speed of the compressor  33  and the blower  34 , the device control unit  43 A, the set temperature T SET  by the operation to the temperature setting button  52 A,  52 B of the air conditioning operation panel  50 , the set air volume Q SET  by the operation to the air volume operation button  51 A,  51 B. Furthermore, the device control unit  43 A refers to the outside air temperature T OUT  detected by the outside air temperature sensor  23  (see  FIG.  1   ), the in-vehicle temperature T IN  detected by the in-vehicle temperature sensor  24 . In addition, the device control unit  43 A refers to the condenser outlet water temperature T CD , which is the refrigerant temperature detected by the condenser outlet water temperature sensor  27  (see  FIG.  3   ), and the evaporator outlet water temperature T EV , which is the refrigerant temperature detected by the evaporator outlet water temperature sensor  26 . 
     Further, functions, for example, are stored in the device control unit  43 A. This function includes the set temperature T SET , the set air volume Q SET , the outside air temperature T OUT , the in-vehicle temperature T IN , the condenser outlet water temperature T CD , and the evaporator outlet water temperature T EV  in the input items. In addition, this function includes the target blowout temperature T AO , the target air volume Q AO  and the compressor speed R COMP  in the output items. 
     Qualitatively, when the set temperature T SET  is lowered during cooling, or when the outside air temperature T OUT , the in-vehicle temperature T IN , and the evaporator outlet water temperature T EV  are raised, the operation setting for strong cooling is set. At this time, the target blowout temperature T AO  is lowered, also the compressor speed R COMP  is increased. 
     On the other hand, when the set temperature T SET  is raised, or when the outside air temperature T OUT , the in-vehicle temperature T IN , and the condenser outlet water temperature T CD  are lowered, the operation setting closer to strong heating is set. At this time, the target blowout temperature T AO  is raised, also the compressor speed R COMP  is raised. 
     Further, the device control unit  43 A sets the blower rotational speed R BL  on the basis of the target blowout temperatures T AO  and the target air volume Q AO  obtained by the above functions. Further, the device control unit  43 A sets the opening of the air mix door  67 B based on the target blowout temperature T AO . 
     ECU 
     As illustrated in  FIG.  1   , the vehicle  100  is provided with a plurality of electronic control units (ECUs). These electronic control units are provided for each function of the vehicle  100 , for example. For example, the vehicle  100  includes a plug-in charge ECU  41  that controls the external charging/power supply device  15 , and a battery ECU  42  that performs SOCs and power management of the battery  10 . 
     In addition, the vehicle  100  includes an air conditioning ECU  43  for controlling the air conditioner  25 , a motor ECU  44  for controlling the rotary electric machine MG 1 , MG 2 , and an engine ECU  45  for controlling the internal combustion engine  16 . Further, the vehicle  100  includes an HV-ECU  40  as a core ECU, also called a central gateway, which integrates these function-specific ECUs. 
     The individual function-specific ECUs can communicate with each other via HV-ECU  40 . The ECUs for each function and HV-ECU  40  are connected by, for example, signal lines conforming to Controller Area Network (CAN) standard. 
       FIG.  5    illustrates a hardware configuration of HV-ECU  40 . The other ECUs of the vehicle  100  have the same configuration as in  FIG.  5   . HV-ECU  40  (and other ECUs) are comprised of, for example, a computer, and include an input/output controller  40 C, CPU  40 D, RAM  40 E, ROM  40 F and a storage  40 G. These devices can communicate with each other via the internal bus  40 H. 
     Input-output controller  40 C receives the signals output from various sensors and other ECUs mounted on the vehicle  100 , and outputs a drive command to the in-vehicle device such as an actuator or a lamp. CPU  40 D executes calculations on the basis of signals received from the input/output controller  40 C, generates a drive command, a protective command for the battery  10 , which will be described later, an operation restriction execution command and a restriction release command for the air conditioner  25 , and transmits them to the input/output controller  40 C. Storage elements such as a RAM  40 E, ROM  40 F and a storage  40 G store control programs, data detected by sensors, and the like. 
     CPU  40 D executes the control programs stored in the storage  40 G or the storage ROM  40 F to configure the power limit determination unit  40 A (see  FIG.  1   ) and the display control unit  40 B as functional blocks in HV-ECU  40 . 
     Further, the CPU executes the control programs stored in the storage or ROM of the air conditioning ECU  43 , whereby the CPU configures the device control unit  43 A, the determination result storage unit  43 B, the strong cooling determination unit  43 C, the strong heating determination unit  43 D, and the power consumption calculation unit  43 E as functional blocks in the air conditioning ECU  43 . 
     As will be described later, the power limit determination unit  40 A of HV-ECU  40 , during the external power supply, to determine whether to execute the operation restriction for the air conditioner  25 . Further, the strong cooling determination unit  43 C and the strong heating determination unit  43 D of the air conditioning ECU  43  executes a sub-process (to be described later) included in the execution availability determination flow of the operation restriction by the power limit determination unit  40 A. Therefore, with respect to the execution availability flow of the operation restriction to the air conditioner  25 , the power limit determination unit  40 A of HV-ECU  40  and the strong cooling determination unit  43 C and the strong heating determination unit  43 D of the air conditioning ECU  43  functions as an integral determination unit in cooperation. 
     The strong cooling determination unit  43 C, the target blowout temperature map to be described later ( FIG.  9   ), the outside air temperature map ( FIG.  10   ), the evaporator outlet water temperature map ( FIG.  11   ), and the blower air volume map ( FIG.  12   ) is stored. The strong heating determination unit  43 D, the target blowout temperature map ( FIG.  15   ), the outside air temperature map ( FIG.  16   ), the condenser outlet water temperature map ( FIG.  17   ), and the blower air volume map described above ( FIG.  12   ) is stored. 
     The determination result storage unit  43 B stores flag values derived from various maps by the strong cooling determination unit  43 C and the strong heating determination unit  43 D. This flag value can be either 0 or 1. Further, a rotational speed limit map ( FIG.  18   ), an evaporator outlet water temperature limit map ( FIG.  19   ), and a condenser outlet water temperature limit map ( FIG.  20   ), which will be described later, are stored in the device control unit  43 A. 
     Power consumption calculation unit  43 E calculates the power consumption of the air conditioner  25  is a control target. For example, based on a command signal to the inverter  19  for supplying driving power to the compressor  33  (e.g., PWM signal), the power consumption calculation unit  43 E calculates the power consumption by the compressor  33 . Further, the power consumption calculation unit  43 E calculates the power consumption by the blower motor  34 A based on a command signal (for example, a PWM signal) to the step-down DC/DC converter  18  for supplying the driving power to the blower motor  34 A. These calculated power consumption value is transmitted to the power limit determination unit  40 A of HV-ECU  40 . 
     Referring to  FIG.  1   , the plug-in charge ECU  41  functions as an external power supply device that controls the external power supply. When the CPU executes the control programs stored in the ROM or the storage of the plug-in charge ECU  41 , the CPU configures the device control unit  41 A and the power-consumption calculating unit  41 B in the plug-in charge ECU  41 . 
     The power consumption calculating unit  41 B calculates the external power supply [W] fed from the inlet  17  to the electric device  72  outside the vehicle, and transmits the power value to the power limit determination unit  40 A of HV-ECU  40 . 
     The device control unit  41 A controls the external charging power/external feeding power by the external charging/power supply device  15 . For example, the device control unit  41 A permits the external power supply only in the ignition-off state in which the vehicle  100  is in the non-traveling condition. Further, for example, when there is a possibility that the SOC of the battery  10  is lowered leads to over-discharge, the device control unit  41 A receives a protective command from the power limit determination unit  40 A of HV-ECU  40 . In response to this, the device control unit  41 A switches the external power supply relay (not shown) connecting the inlet  17  and the battery  10  from the connected state to the disconnected state to stop the operation of the external charging/power supply device  15 . 
     The battery ECU  42  monitors and protects the battery  10 . The control programs stored in the ROMs or storages of the battery ECU  42  are executed by the CPUs, whereby the SOC calculation unit  42 A is configured in the battery ECU  42 . The SOC calculation unit  42 A calculates the SOC of the battery  10  and transmits the SOC to HV-ECU  40  power limit determination unit  40 A. 
     In calculating the SOC, the SOC calculation unit  42 A measures the current flowing into and out of the battery  10  based on the current value detected from the current sensor  10 A connected to the battery  10 . Furthermore, the SOC calculation unit  42 A estimates the SOC of the battery  10  based on the integrated value (current integrated value). 
     Further, the battery  10  may occur self-discharge due to chemical reaction or the like therein, SOC is lowered due to this. However, the self-discharge is an internal reaction of the battery and does not involve the inflow or outflow of current to or from the outside. Therefore, even if self-discharge occurs, self-discharge is not reflected in the current accumulated value. As a result, as the self-discharge progresses, the deviation between the estimated value of the SOC based on the integrated current value and the actual SOC increases. Therefore, for example, the SOC calculation unit  42 A estimates the SOC based on the open-end voltage value (OCV) of the battery. Based on this, the SOC calculation unit  42 A corrects the SOC estimation value based on the current integrated value. 
     &lt;Determine whether or not to Execute the Operation Restriction&gt; 
         6 , a flowchart for determining whether to execute the operation restriction of the external power supply and the air conditioner  25  is exemplified. When the vehicle  100  supplies power to an external electric device, this determination flow is repeatedly executed at predetermined time intervals, for example, one minute intervals. 
     The power limit determination unit  40 A of HV-ECU  40  acquires the SOC of the battery  10  from the SOC calculation unit  42 A of the battery ECU  42 . Further, the power limit determination unit  40 A determines whether or not the acquired SOC is less than the predetermined battery protection threshold SOCth 0  (S 10 ). The battery protection threshold SOCth 0  is set to, for example, 20%. 
     If the SOC of the battery  10  is less than the battery protection threshold SOCth 0 , over-discharging may degrade the battery  10 . Therefore, HV-ECU  40  stops the external charging/power supply device  15  and the air conditioner  25 . 
     Here, prior to the stop command for the external charging/power supply device  15  and the air conditioner  25  is outputted, the power limit determination unit  40 A outputs a warning command to the display control unit  40 B. In response to this, the display control unit  40 B, the display unit  57  of the air conditioning operation panel  50  ( FIG.  4   ), the message indicating that the external power supply and the air conditioning function is stopped after a predetermined time (e.g., after 3 minutes) (battery protection message) is displayed (S 12 ). 
     In particular, with respect to the external power supply, the electric device  72  of the power supply destination is a wide variety, there is a possibility that the electric device  72  fails due to a sudden power interruption. Therefore, by notifying the power shutdown to the occupant before the power shutdown, it is possible to prompt the stop operation of the electric device by the occupant. 
     After a predetermined time has elapsed after the battery protection message is displayed, the power limit determination unit  40 A transmits a stop command to stop the operation of the external charging/power supply device  15  to the device control unit  41 A of the plug-in charge ECU  41  (S 14 ). Further, in conjunction with this, the power limit determination unit  40 A, the device control unit  43 A of the air conditioning ECU  43 , and transmits a stop command for stopping the operation of the air conditioner  25 . Thereafter, the flow of  FIG.  6    ends. 
     Returning to step S 10 , when the SOC of the battery  10  is equal to or greater than the battery protection threshold SOCth 0 , the power limit determination unit  40 A determines whether or not the SOC of the battery  10  is less than the predetermined battery determination threshold SOCth 1  (&gt;SOCth 0 ) (S 16 ). The battery determination threshold SOCth 1  may be, for example, 50%. 
     In S 16 , if SOC SOCth 1 , it is determined that the SOC of the battery  10  is adequate. Therefore, the power limit determination unit  40 A transmits a limit release command to the device control unit  43 A of the air conditioning ECU  43 . In response, the device control unit  43 A sets off the air conditioning use power limit (S 28 ). Thus, exclusively based on the various switches and button operations of the air conditioning operation panel  50  (see  FIG.  4   ), the device control unit  43 A performs operation control of the compressor  33  and the blower  34 . 
     On the other hand, when the SOC of the battery  10  is less than the battery determination threshold SOCth 1  in step S 16 , the power limit determination unit  40 A outputs an execution command of the strong cooling determination flow (see  FIGS.  7  and  8   ) to the strong cooling determination unit  43 C of the air conditioning ECU  43  (S 18 ). 
     The strong cooling determination flow is a sub process of the executability determination flow of  FIG.  6   . Although the flow of the strong cooling determination will be described in detail later, in the flow, when all of the following four conditions (A-1)-(A-4) are satisfied with respect to the cooling operation state of the air conditioner  25 , the strong cooling determination unit  43 C determines that the air conditioner  25  is executing strong cooling. On the other hand, when at least one of the following four conditions is not satisfied, the strong cooling determination unit  43 C determines that strong cooling is not executed. 
     (A-1) Target blowout temperature Tao is less than the predetermined cooling blowout threshold temperature *T AO-C/D  (the blowout temperature is set low because the vehicle is hot).
 
(A-2) Outside temperature T OUT  exceeds the specified threshold temperature *T OUT-C/D  for cooling (outside is hot)
 
(A-3) Refrigerant temperature after heat exchange with air blown into the vehicle cabin, i.e. evaporator outlet water temperature T EV  exceeds a predetermined refrigerant threshold temperature during cooling *T EV-C/D  (heat exchange quantity is large)
 
(A-4) The target air volume Q AO  of the blower  34  exceeds the predetermined threshold air volume *Q AO  (the air volume of the air conditioner is large).
 
     The power limit determination unit  40 A determines whether or not the determination result by the strong cooling determination unit  43 C is performing strong cooling, confirms (S 20 ). When it is determined that the air conditioner  25  is executing the strong cooling, the power limit determination unit  40 A determines that the operation restriction is to be executed in step S 26 . Details of the operation restriction will be described later. 
     At step S 20 , when the cooling state of the air conditioner  25  is determined by the strong cooling determination unit  43 C is not strong cooling, the power limit determination unit  40 A of HV-ECU  40 , the strong heating determination unit  43 D of the air conditioning ECU  43 , the strong heating determination flow (see  FIGS.  13  and  14   ) to output an execution command (S 22 ). 
     Details of the strong heating determination flow will be described later. In this flowchart, when all of the following four conditions (B-1)-(B-4) are satisfied with respect to the heating operation state of the air conditioner  25 , the strong heating determination unit  43 D determines that the air conditioner  25  is performing strong heating. On the other hand, when at least one of the following four conditions is not satisfied, the strong heating determination unit  43 D determines that strong heating is not executed. 
     (B-1) Target blowout temperature Tao exceeds the specified blowout threshold temperature *T AO-W/U  during heating (blowout temperature is set high because the vehicle is cold).
 
(B-2) Outside temperature T OUT  is less than the specified threshold temperature *T OUT-W/U  for heating (cold outside)
 
(B-3) The refrigerant temperature after heat exchange with the air blown into the vehicle cabin, i.e., the condenser outlet water temperature T CD , is less than the predetermined threshold temperature *T CD-W/U  for heating (heat exchange is large).
 
(B-4) The target air volume Q AO  of the blower  34  exceeds the predetermined threshold air volume *Q AO  (the air volume of the air conditioner is large).
 
     The power limit determination unit  40 A whether the determination by the strong heating determination unit  43 D is performing strong heating confirms (S 24 ). When it is determined that the air conditioner  25  is executing strong heating, the power limit determination unit  40 A determines that the operation restriction is to be executed in step S 26 . Details of the operation restriction will be described later. 
     On the other hand, in the step S 24 , when the air conditioner  25  is determined not to execute the strong heating, so that both the strong cooling and the strong heating is not executed. Therefore, the power limit determination unit  40 A, as the output of the non-execution determination for the drive limit, and transmits a limit release command to the device control unit  43 A of the air conditioning ECU  43 . In response, the device control unit  43 A sets off the air conditioning use power limit (S 28 ). 
     Thus, the operation restriction of the air conditioner  25 , by being effective only when performing strong cooling or strong heating, it is possible to improve the comfort of the occupant than in the prior art. 
     &lt;Strong Cooling Judgment&gt; 
     In  FIGS.  7  and  8   , the strong cooling determination flow executed by the strong cooling determination unit  43 C is exemplified. The strong cooling determination unit  43 C calls the previous strong cooling determination result from the determination result storage unit  43 B. Then, the strong cooling determination unit  43 C whether the flag value of the target blowout temperature determination flag is 1 determines (S 30 ). 
     In  FIG.  9   , the target blowout temperature map during cooling is exemplified. In this map, the target blowout temperatures Tao are taken on the horizontal axis. In addition, the map takes the flag values 0 and 1 on the vertical axis. The maps exemplified in  FIGS.  9  to  12    including this map are stored in, for example, the strong cooling determination unit  43 C. 
     Including this map, in the map used in the strong cooling determination flow and strong heating determination flow ( FIGS.  9  to  12  and  15  to  17   ), hysteresis setting is performed to prevent chattering. That is, the threshold of the lower level and the threshold of the higher level are set as the threshold defining which of the flag value 0, 1 to be taken. 
     For example, in the cooling time target blowout temperature map of  FIG.  9   , as the cooling time outlet threshold temperature *T AO-C/D , the temperature value T 1  and the temperature value T 2  (T 1 &lt;T 2 ) is determined. For example, the temperature value T 1  is set to 20° C., and the temperature value T 2  is set to 23° C. 
     When the flag value 1 is output in the previous strong cooling determination, the flag value 1 is output when the present value of the target blowout temperature T AO  acquired from the device control unit  43 A is less than the temperature value T 2 . On the other hand, when the flag value is 0 in the previous strong cooling determination, the flag value 1 is outputted when the present value of the target blowout temperature T AO  is less than the temperature value T 1 . 
     Strong cooling determination unit  43 C refers to the previous value of the cooling time target blowout temperature map from the determination result storage unit  43 B. In step S 30 , the strong cooling determination unit  43 C determines whether the previous value is 1. When the previous value is 1, the strong cooling determination unit  43 C acquires the present value of the target blowout temperature T AO  from the device control unit  43 A. In step S 32 , the strong cooling determination unit  43 C determines whether the present value is less than the threshold T 2 . When T AO &lt;T 2 , the strong cooling determination unit  43 C sets the value of the target blowout temperature determination flag to 1 (S 36 ). On the other hand, if T AO ≥T 2 , the strong cooling determination unit  43 C sets the value of the target blowout temperature determination flag to 0 (S 38 ). 
     Returning to S 30 , when the previous value is 0, the strong cooling determination unit  43 C determines whether or not the present value of the target blowout temperature T AO  is less than the threshold T 1  (S 34 ). When T AO &lt;T 1 , the strong cooling determination unit  43 C sets the value of the target blowout temperature determination flag to 1 (S 36 ). On the other hand, when T AO ≥T 1 , the strong cooling determination unit  43 C sets the target blowout temperature determination flag to 0 (S 38 ). 
     Next, the strong cooling determination unit  43 C refers to the previous value of the outside air temperature map during cooling (see  FIG.  10   ) from the determination result storage unit  43 B. Then, the strong cooling determination unit  43 C determines whether or not the previous value (i.e., the determination flag value) is 1 (S 40 ). In this map, the outside air threshold temperatures at the time of cooling *T OUT-C/D  are the thresholds T 3  and T 4  (T 3 &lt;T 4 ). For example, the temperature value T 3  is set to 30° C., and the temperature value T 4  is set to 33° C. 
     When the previous value of the outside air temperature map during cooling is 1, the strong cooling determination unit  43 C acquires the present value of the outside air temperature T OUT  from the outside air temperature sensor  23 . In step S 42 , the strong cooling determination unit  43 C determines whether the present value exceeds the threshold T 3 . When T OUT &gt;T 3 , the strong cooling determination unit  43 C sets the target blowout temperature determination flag to 1 (S 46 ). On the other hand, when T OUT ≤T 3 , the strong cooling determination unit  43 C sets the value of the outside air temperature determination flag to 0 (S 48 ). 
     Returning to S 40 , when the previous value of the target blowout temperature determination flag is 0, the strong cooling determination unit  43 C determines whether or not the present value of the outside air temperature Tour exceeds the threshold T 4  (S 44 ). When T OUT &gt;T 4 , the strong cooling determination unit  43 C sets the target blowout temperature determination flag to 1 (S 46 ). On the other hand, when T OUT ≤T 4 , the strong cooling determination unit  43 C sets the target blowout temperature determination flag to 0 (S 48 ). 
     Next, the strong cooling determination unit  43 C refers to the previous value of the evaporator outlet water temperature map during cooling (see  FIG.  11   ) from the determination result storage unit  43 B. In step S 50 , the strong cooling determination unit  43 C determines whether the previous value is 1. In this map, the cooling-time coolant threshold temperatures *T EV-C/D  are the thresholds T 5  and T 6  (T 5 &lt;T 6 ). For example, the temperature value T 5  is set to 0° C., and the temperature value T 6  is set to 3° C. 
     When the previous value of the evaporator outlet water temperature map at the time of cooling is 1, the strong cooling determination unit  43 C acquires the present value of the evaporator outlet water temperature T EV  from the evaporator outlet water temperature sensor  26 . In step S 52 , the strong cooling determination unit  43 C determines whether the present value exceeds the threshold T 5 . When T EV &gt;T 5 , the strong cooling determination unit  43 C sets the value of the evaporator outlet water temperature determination flag to 1 (S 56 ). On the other hand, when T EV T 5 , the strong cooling determination unit  43 C sets the value of the evaporator outlet water temperature determination flag to 0 (S 58 ). 
     Returning to S 50 , when the previous value of the evaporator outlet water temperature determination flag is 0, the strong cooling determination unit  43 C determines whether or not the present value of the evaporator outlet water temperature T EV  exceeds the threshold T 6  (S 54 ). When T EV &gt;T 6 , the strong cooling determination unit  43 C sets the value of the evaporator outlet water temperature determination flag to 1 (S 56 ). On the other hand, when T EV ≤T 6 , the strong cooling determination unit  43 C sets the value of the evaporator outlet water temperature determination flag to 0 (S 58 ). 
     Next, the strong cooling determination unit  43 C refers to the previous value of the blower air volume map (see  FIG.  12   ) from the determination result storage unit  43 B. In step S 60 , the strong cooling determination unit  43 C determines whether the previous value is 1. Note that in this map, the threshold air volume *Q AO  becomes the thresholds Q 1  and Q 2  (Q 1 &lt;Q 2 ). For example, the air volume Q 1  is set to a value of 80% of the maximum air volume of the blower  34 . Furthermore, for example, the air volume Q 2  is set to 90% of the maximum air volume of the blower  34 . 
     When the previous value of the blower air volume map is 1, the strong cooling determination unit  43 C acquires the present value of the target air volume Q AO  of the blower  34  from the device control unit  43 A. In step S 62 , the strong cooling determination unit  43 C determines whether the present value exceeds the threshold Q 1 . If Q AO &gt;Q 1 , the strong cooling determination unit  43 C sets the value of the blower air volume determination flag to 1 (S 66 ). On the other hand, if Q AO ≤Q 1 , the strong cooling determination unit  43 C sets the value of the blower air volume determination flag to 0 (S 68 ). 
     Returning to S 60 , when the previous value of the blower air volume determination flag is 0, the strong cooling determination unit  43 C determines whether or not the present value of the target air volume Q AO  of the blower  34  exceeds the threshold Q 2  (S 64 ). If Q AO &gt;Q 2 , the strong cooling determination unit  43 C sets the value of the blower air volume determination flag to 1 (S 66 ). On the other hand, if Q AO ≤Q 2 , the strong cooling determination unit  43 C sets the value of the blower air volume determination flag to 0 (S 68 ). 
     Further, in step S 70 , the strong cooling determination unit  43 C determines whether or not flag values 1 are set in all of the target blowout temperature determination flag, the outside air temperature determination flag, the evaporator outlet water temperature determination flag, and the blower air volume determination flag. When all four flags are flag value 1, the strong cooling determination unit  43 C that the air conditioner  25  is in the strong cooling execution, it is determined (S 72 ). On the other hand, if at least one of the above four flags takes the flag value 0, the air conditioner  25  is strong cooling determination unit  43 C and is not executing the strong cooling, it is determined (S 74 ). 
     &lt;Strong Heating&gt; 
     In  FIGS.  13  and  14   , the strong heating determination flow to be executed by the strong heating determination unit  43 D is exemplified.  FIG.  15    illustrates a heating target blowout temperature map. In this map, the target blowout temperatures T AO  are taken on the horizontal axis. In addition, the map takes the flag values 0,1 on the vertical axis. The maps illustrated in  FIGS.  15  to  17    including this map are stored in, for example, the strong heating determination unit  43 D. Further, the blower air volume map (see  FIG.  12   ) is also stored in the strong heating determination unit  43 D. 
     In the heating time target blowout temperature map illustrated in  FIG.  15   , as the heating time blowout threshold temperature *T AO-W/U , the temperature value T 11  and the temperature value T 12  (T 11 &lt;T 12 ) is determined. For example, the temperature value T 11  is set to 25° C., and the temperature value T 12  is set to 28° C. Strong heating determination unit  43 D refers to the previous value of the heating time target blowout temperature map from the determination result storage unit  43 B. Then, the strong heating determination unit  43 D confirms whether or not the previous value is 1 (S 100 ). 
     When the previous value is 1, the strong heating determination unit  43 D acquires the present value of the target blowout temperature T AO  from the device control unit  43 A. Then, the strong heating determination unit  43 D determines whether or not the present value exceeds the threshold T 11  (S 102 ). If T AO &gt;T 11 , the strong heating determination unit  43 D sets the value of the target blowout temperature determination flag to 1 (S 106 ). On the other hand, if T AO ≤T 11 , the strong heating determination unit  43 D sets the value of the target blowout temperature determination flag to 0 (S 108 ). 
     Returning to step S 100 , when the previous value of the heating target blowout temperature map is 0, the strong heating determination unit  43 D determines whether or not the present value of the target blowout temperature T AO  exceeds the threshold T 12  (S 104 ). If T AO &gt;T 12 , the strong heating determination unit  43 D sets the value of the target blowout temperature determination flag to 1 (S 106 ). On the other hand, if T AO ≤T 12 , the strong heating determination unit  43 D sets the value of the target blowout temperature determination flag to 0 (S 108 ). 
     Next, the strong heating determination unit  43 D refers to previous values of the outside air temperature map at the time of heating shown in  FIG.  16    from the determination result storage unit  43 B. Then, the strong heating determination unit  43 D determines whether or not the previous value (that is, the determination flag value) is 1 (S 110 ). In this map, the outside air threshold temperatures *T OUT-W/U  during heating are the thresholds T 13  and T 14  (T 13 &lt;T 14 ). For example, the temperature value T 13  is set to 3° C., and the temperature value T 14  is set to 6° C. 
     If the previous value of the heating time outside air temperature map is 1, the strong heating determination unit  43 D acquires the present value of the outside air temperature T OUT  from the outside air temperature sensor  23 . Then, the strong heating determination unit  43 D determines whether or not the present value is less than the threshold T 14  (S 112 ). If T OUT &lt;T 14 , the strong heating determination unit  43 D sets the value of the target blowout temperature determination flag to 1 (S 116 ). On the other hand, if T OUT ≥T 14 , the strong heating determination unit  43 D sets the value of the outside air temperature determination flag to 0 (S 118 ). 
     Returning to step S 110 , when the previous value of the target blowout temperature determination flag is 0, the strong heating determination unit  43 D determines whether or not the present value of the outside air temperature T OUT  is less than the threshold T 13  (S 114 ). If T OUT &lt;T 13 , the strong heating determination unit  43 D sets the value of the target blowout temperature determination flag to 1 (S 116 ). On the other hand, if T OUT ≥T 13 , the strong heating determination unit  43 D sets the value of the target blowout temperature determination flag to 0 (S 118 ). 
     Next, the strong heating determination unit  43 D refers to the previous value of the condenser outlet water temperature map during heating (see  FIG.  17   ) from the determination result storage unit  43 B. Then, the strong heating determination unit  43 D confirms whether or not the previous value is 1 (S 120 ). In this map, the heating-time refrigerant threshold temperature *T CD-W/U  is the threshold T 15  and T 16  (T 15 &lt;T 16 ). For example, the temperature value T 15  is set to 40° C. Further, for example, the temperature value T 16  is set to 43° C. 
     When the previous value of the condenser outlet water temperature map during heating is 1, the strong heating determination unit  43 D acquires the present value of the condenser outlet water temperature T CD  from the condenser outlet water temperature sensor  27 . Then, the strong heating determination unit  43 D determines whether or not the present value is less than the threshold T 16  (S 122 ). If T CD &lt;T 16 , the strong heating determination unit  43 D sets the value of the condenser outlet water temperature determination flag to 1 (S 126 ). On the other hand, if T CD ≥T 16 , the strong heating determination unit  43 D sets the value of the condenser outlet water temperature determination flag to 0 (S 128 ). 
     Returning to step S 120 , when the previous value of the condenser outlet water temperature determination flag is 0, the strong heating determination unit  43 D determines whether or not the present value of the condenser outlet water temperature T CD  is less than the threshold T 15  (S 124 ). When T CD &lt;T 15 , the strong heating determination unit  43 D sets the value of the condenser outlet water temperature determination flag to 1 (S 126 ). On the other hand, if T CD ≥T 15 , the strong heating determination unit  43 D sets the value of the condenser outlet water temperature determination flag to 0 (S 128 ). 
     Next, the strong heating determination unit  43 D refers to the previous value of the blower air volume map (see  FIG.  12   ) from the determination result storage unit  43 B. Then, the strong heating determination unit  43 D confirms whether or not the previous value is 1 (S 130 ). When the previous value of the blower air volume map is 1, the strong heating determination unit  43 D acquires the present value of the target air volume Q AO  of the blower  34  from the device control unit  43 A. Then, the strong heating determination unit  43 D determines whether or not the present value exceeds the threshold Q 1  (S 132 ). If Q AO &gt;Q 1 , the strong heating determination unit  43 D sets the value of the blower air volume determination flag to 1 (S 136 ). On the other hand, when Q AO &gt;Q 1 , the strong heating determination unit  43 D sets the blower air volume determination flag to 0 (S 138 ). 
     Returning to step S 130 , when the previous value of the blower air volume determination flag is 0, the strong heating determination unit  43 D determines whether or not the present value of the target air volume Q AO  of the blower  34  exceeds the threshold Q 2  (S 134 ). If Q AO &gt;Q 2 , the strong heating determination unit  43 D sets the value of the blower air volume determination flag to 1 (S 136 ). On the other hand, if Q AO ≤Q 2 , the strong heating determination unit  43 D sets the value of the blower air volume determination flag to 0 (S 138 ). 
     Further, the strong heating determination unit  43 D determines whether or not the flag value 1 is set in all of the target blowout temperature determination flag, the outside air temperature determination flag, the condenser outlet water temperature determination flag, and the blower air volume determination flag (S 140 ). When all four flags are flag value 1, the strong heating determination unit  43 D and the air conditioner  25  is in the strong heating execution, it determines (S 142 ). On the other hand, if at least one of the above four flags takes the flag value 0, the air conditioner  25  is strong heating determination unit  43 D and not executing the strong heating, it is determined (S 144 ). 
     As described above, in the strong cooling and strong heating determination flow according to the present embodiment, the execution determination of strong cooling and strong heating is not performed unless all the conditions relating to the target blowout temperature, the outside air temperature, the condenser outlet water temperature, and the blower air volume are satisfied. Thus, by limiting the establishment conditions of the strong cooling and the strong heating, the operation restriction of excessive air conditioning is avoided. In addition, the comfort of the occupant can be improved. 
     &lt;Air Conditioner Operation Restriction&gt; 
     When the limit execution command is received from the power limit determination unit  40 A of HV-ECU  40 , the device control unit  43 A, based on the air conditioning limit map illustrated in  FIGS.  18  to  20   , the operation restriction of the air conditioner  25 . 
     The restriction map of  FIG.  18    shows the SOC of the battery  10  on the horizontal axis. In addition, the restriction map of  FIG.  18    shows the upper rotational speed limit of the compressor  33  and the blower  34  on the vertical axis. On the coordinate plane defined by the horizontal axis and the vertical axis, the limit characteristic line L 1  is set. The limit characteristic line L 1  is set, for example, in a stepwise shape with a right shoulder rising. 
     For example, when the SOC of the battery  10  is equal to or higher than a predetermined battery determination threshold SOCth 1 , the upper limit rotational speed of the compressor  33  and the blower  34  can be set to a maximum rotational speed Rmax. On the other hand, when the SOC of the battery  10  is less than the battery determination threshold SOCth 1 , the upper limit rotational speed of the compressor  33  and the blower  34  is gradually reduced along the characteristic line L 1  as the SOC approaches 0. Further, when the SOC of the battery  10  is less than a predetermined battery protection threshold SOCth 0 , the upper limit rotational speed of the compressor  33  and the blower  34  becomes 0. 
     Additionally, the compressor  33  and blower  34  are shut down when the SOCs of the batteries  10  are less than a predetermined battery protection threshold SOCth 0 . 
     The SOC of the battery  10  is transmitted to the device control unit  43 A together with the limit executing command from the power limit determination unit  40 A. In response, the device control unit  43 A, based on the received SOC and the limit characteristic line L 1 , obtains the upper limit rotational speed of the compressor  33 . 
     After the upper limit rotational speed is determined, the required rotational speed of the compressor  33  with the operation to the temperature setting button  52 A,  52 B of the air conditioning operation panel  50 , when exceeding the upper limit rotational speed, the device control unit  43 A, (contrary to the operation) the set rotational speed of the compressor  33 , the upper limit rotational speed rather than the required rotational speed It is determined. 
     In  FIG.  19   , a limiting map is illustrated with respect to the target temperature of the outlet water temperature of the evaporator  31  (see  FIG.  3   ) used during cooling. In this restriction map, the SOC of the battery  10  is shown on the horizontal axis. In addition, in this restriction map, the target temperature of the evaporator outlet water temperature is indicated on the vertical axis. A limit characteristic line L 2  is set on a coordinate plane defined by the horizontal axis and the vertical axis. The limit characteristic line L 2  is set, for example, in a stepwise shape with a right shoulder decreasing. 
     For example, when the SOC of the battery  10  is equal to or higher than a predetermined battery determination threshold SOCth 1 , the target temperature of the evaporator outlet water temperature is set to the temperature T EV-OBJ  during normal operation. On the other hand, when the SOC of the battery  10  is less than the battery determination threshold SOCth 1 , along the characteristic line L 2 , the target temperature of the evaporator outlet water temperature is raised stepwise as the SOC approaches 0. For example, a value obtained by adding a predetermined temperature (5° C. to 20° C.) to the temperature T EV-OBJ  during normal operation, the determination value of the target temperature value of the evaporator outlet water temperature. 
     In  FIG.  20   , a restriction map is exemplified with respect to the target temperature of the outlet water temperature of the indoor condenser  32  (see  FIG.  3   ) used during heating. In this restriction map, the SOC of the battery  10  is shown on the horizontal axis. In addition, in this restriction map, the target temperature of the condenser outlet water temperature is shown on the vertical axis. On the coordinate plane defined by the horizontal axis and the vertical axis, the limit characteristic line L 3  is set. The limit characteristic line L 3  is set, for example, in a stepwise shape with a right shoulder rising. 
     For example, when the SOC of the battery  10  is equal to or higher than a predetermined battery determination threshold SOCth 1 , the target temperature of the condenser outlet water temperature is set to the temperature T CD-OBJ  during normal operation. 
     On the other hand, when the SOC of the battery  10  is less than the battery determination threshold SOCth 1 , along the characteristic line L 3 , the target temperature of the condenser outlet water temperature is raised stepwise as the SOC approaches 0. For example, a value obtained by subtracting a predetermined temperature (20° C. from 5° C.) to the temperature T CD-OBJ  during normal operation, the determined value of the target temperature value of the condenser outlet water temperature. 
     If the actual value of the evaporator outlet water temperature or the condenser outlet water temperature deviates from the target temperature, feedback control is performed so as to reduce the difference between the actual value and the target value. For example, in the cooling, when the actual value is higher than the target temperature, the rotational speed of the compressor  33  and the blower  34  is raised, also the target blowout temperature is reduced. Furthermore, for example, in the heating, when the actual value is lower than the target temperature, the rotational speed of the compressor  33  and the blower  34  is raised, also the target blowout temperature is increased (when heating). As in  FIGS.  19  and  20   , by the operation restriction is applied so as to reduce the difference between the target temperature and the actual value, the rotational speed increase of the compressor  33  and the blower  34 , reduction of the target blowout temperature (during cooling) or increase (during heating) can be suppressed. 
     Incidentally, over the entire period in which the operation restriction to the air conditioner  25  is executed, the device control unit  43 A controls the inside and outside air switching door  67 A (see  FIG.  3   ). Then, the device control unit  43 A closes the outside air introduction port  62 . That is, the device control unit  43 A by fully opening the inside air introduction port  61  over the entire duration of the operation restriction, the air conditioning control by the inner air circulation is performed. 
     By internal air circulation is performed, repeatedly air flows into the air conditioner  25 . Therefore, even under the operation restriction of the air conditioner  25 , it is possible to approach the target blowout temperature T AO  in stages. 
     In general, since the humidity in the vehicle cabin increases due to the internal air circulation, there is a possibility that fogging occurs in the window material such as windshield glass. However, as described above, in the ignition-off state in which the vehicle  100  is not allowed to travel, external power supply becomes available. Therefore, a situation in which the window material becomes cloudy and visibility becomes poor, which makes driving difficult, does not occur in the first place. 
     Such, in order to reliably enable the air conditioning control by the inside air circulation, the device control unit  43 A does not accept the operation of the inside and outside air switching switch  56  from the air conditioning operation panel  50  (see  FIG.  4   ). For example, over the entire period in which the operation restriction is executed, the device control unit  43 A invalidates the outside air introduction command by the input-operation from the air conditioning operation panel  50 . 
     Incidentally, when the outdoor air introduction operation is prohibited in this way, by the occupant opens the window, the fogging of the window material is eliminated. In order to enable such an operation, the window regulator (not shown) is set to be operable regardless of whether or not the operation restriction on the air conditioner  25  is executed. 
     &lt;Relationship between Operation Restrictions and Strong Air-Conditioning/Strong Air-Conditioning Judgments&gt; 
     By operation restriction is imposed on the air conditioner  25 , the vehicle cabin temperature is hot (during cooling) or cold (during heating) state is maintained for a while. Therefore, the target blowout temperature T is maintained at a low value (during cooling) or a high value (during heating) at the target blowout temperature T AO . That is, in the strong cooling determination and strong heating determination, the condition in which the target blowout temperature determination flag is set to 1 is maintained. 
     Further, according to the restriction map of  FIGS.  19  and  20   , the evaporator outlet water temperature (during cooling) is maintained at a high temperature. Furthermore, by the restriction map of  FIGS.  19  and  20   , the condenser outlet water temperature (during heating) is maintained at a low temperature. Along with this, the evaporator outlet water temperature determination flag (during cooling) and the condenser outlet water temperature determination flag (during heating) are maintained under the condition of being set to 1. 
     On the other hand, when the outside air temperature decreases (during cooling) or rises (during heating), the outside air temperature determination flag can be set to  0 . Further, when the occupant narrows the blower air volume, the blower air volume determination flag can be set to 0. Such external conditions and the operation of the occupant, the determination of the strong cooling and heating is canceled. 
     &lt;Alternative Example of Air Conditioner&gt; 
     Another example of an air conditioner  25  is shown in  FIG.  21   . The air conditioner  25 , unlike the heat pump type as in  FIG.  3   , the heating mechanism and the cooling mechanism is separated. Specifically, a heater mechanism comprising a radiator  130 , an internal combustion engine  16 , and a heater core  132  is provided in the air conditioner  25 . Furthermore, the refrigerant outlet of the heater core  132 , the heater outlet water temperature sensor  127  for detecting the refrigerant temperature is provided. Further, the compressor  33 , the outdoor condenser  30 , the evaporator  31 , and the cooler mechanism comprising an accumulator  37  is provided in the air conditioner  25 . 
     Also in such an air conditioner  25 , the execution determination flow of the operation restriction illustrated in  FIG.  6    is executed by the power limit determination unit  40 A of HV-ECU  40 . In addition, the strong cooling determination is executed by the strong cooling determination unit  43 C of the air conditioning ECU  43 . Furthermore, strong heating determination is executed by the strong heating determination unit  43 D. 
     In  FIGS.  22  and  23   , strong heating determination flowchart by the strong heating determination unit  43 D is exemplified. This flow, as compared with the strong heating determination flow of  FIGS.  13  and  14   , the step group of the condenser outlet water temperature determination (S 120  to S 128 ) replaces the step group of the heater outlet temperature determination (S 150  to S 158 ). Further, in step S 140  of  FIG.  14   , instead of the value of the condenser outlet water temperature determination flag is confirmed, in step S 160  of  FIG.  23   , the value of the heater outlet water temperature determination flag is confirmed. Since the remaining steps are the same as those in  FIGS.  13  and  14   , the description thereof will be omitted below as appropriate. 
     Further, in the strong heating determination unit  43 D, instead of the condenser outlet water temperature map (see  FIG.  17   ), the heater outlet water temperature map exemplified in  FIG.  24    is stored. In this map, the refrigerant threshold temperature *T HT-W/U  during heating has become the threshold T 17  and the threshold T 18  (T 17 &lt;T 18 ). For example, the temperature value T 17  is set to 40° C., and the temperature value T 18  is set to 43° C. 
     In the strong heating determination flow of  FIGS.  22  and  23   , after the step S 116  or step S 118  is executed, the strong heating determination unit  43 D refers to the previous value of the heater outlet water temperature map from the determination result storage unit  43 B. Then, the strong heating determination unit  43 D confirms whether or not the previous value is 1 (S 150 ). 
     If the previous value of the heater outlet water temperature map is 1, the strong heating determination unit  43 D acquires the present value of the heater outlet water temperature T HT  from the heater outlet water temperature sensor  127 . Then, the strong heating determination unit  43 D determines whether or not the present value is less than the threshold T 18  (S 152 ). If T HT &lt;T 18 , the strong heating determination unit  43 D sets the value of the heater outlet water temperature determination flag to 1 (S 156 ). On the other hand, if T HT ≥T 18 , the strong heating determination unit  43 D sets the value of the heater outlet water temperature determination flag to 0 (S 158 ). 
     Returning to step S 150 , when the previous value of the heater outlet water temperature determination flag is 0, the strong heating determination unit  43 D determines whether or not the present value of the heater outlet water temperature T HT  is less than the threshold T 17  (S 154 ). If T HT &lt;T 17 , the strong heating determination unit  43 D sets the value of the heater outlet water temperature determination flag to 1 (S 156 ). On the other hand, if T HT ≥T 17 , the strong heating determination unit  43 D sets the value of the heater outlet water temperature determination flag to 0 (S 158 ). 
     Then, in  FIG.  23   , after the step S 136  and step S 138  is executed, the target blowout temperature determination flag, the outside air temperature determination flag, the heater outlet water temperature determination flag, and in all of the blower air volume determination flag, the strong heating determination unit  43 D whether the flag value 1 is set is determined (S 160 ). When all four flags are flag value 1, the strong heating determination unit  43 D and the air conditioner  25  is in the strong heating execution, it determines (S 142 ). On the other hand, if at least one of the above four flags takes the flag value 0, the strong heating determination unit  43 D and the air conditioner  25  is not executing the strong heating, it is determined (S 144 ). 
     Further, when the operation restriction execution of the air conditioner  25 , instead of the limit map (see  FIG.  20   ) relating to the target temperature of the outlet water temperature of the indoor condenser  32  (see  FIG.  3   ), the heater core  132  (see  FIG.  21   ) limit map relating to the target temperature of the outlet water temperature (see  FIG.  25   ) is used. 
     In this restriction map, the SOC of the battery  10  is shown on the horizontal axis. Furthermore, in this restriction map, the target temperature of the heater outlet water temperature is indicated on the vertical axis. On the coordinate plane defined by the horizontal axis and the vertical axis, the limit characteristic line L 4  is set. The limit characteristic line L 4  is set, for example, in a stepwise shape with a right shoulder rising. 
     For example, when the SOC of the battery  10  is equal to or higher than a predetermined battery determination threshold SOCth 1 , the target temperature of the heater outlet water temperature is set to the temperature T HT-OBJ  during normal operation. On the other hand, when the SOC of the battery  10  is less than the battery determination threshold SOCth 1 , along the characteristic line L 4 , the target temperature of the condenser outlet water temperature is raised stepwise as the SOC approaches 0. 
     &lt;Another Example of an Execution Determination Flow of an Operation Restriction&gt; 
     In the execution determination flow illustrated in  FIG.  6   , when the SOC of the battery  10  becomes less than the SOC SOCth 1 , it is determined whether or not the operation restriction can be executed. However, the SOC condition may be omitted. That is, in the determination flow of  FIG.  6   , even when the SOC of the battery  10  is high by omitting step S 16 , the air conditioning control may be performed so as to be able to regulate the strong cooling and heating. In this way, it is possible to increase the power charged to the external power supply.