vehicle

Abstract

To provide a vehicle that can more easily determine whether or not a part related to the supply of thermal energy from a heater to an electricity storage device has failed. [Solution] The vehicle 10 is equipped with a circuit section 28 that can transfer thermal energy to the air conditioning unit 16 by flowing coolant heated by a water heating heater 18 toward the air conditioning unit 16, a circuit section 38 that can transfer thermal energy to the battery unit 14 by flowing coolant heated by the water heating heater 18 toward the battery unit 14, and a flow control valve 20 that can adjust the flow rate of the coolant flowing through these circuit sections, and a control unit controls the flow control valve 20 and determines the state of the circuit section 38 and the circuit section 40 based on the measurement results of a first thermometer 24 for the coolant flowing through the circuit section 40 to which thermal energy is supplied from the circuit section 38 via a heat exchanger 22.

Description

[Technical Field]

[0001] The present invention relates to a vehicle. [Background technology]

[0002] Patent Document 1 below discloses an invention related to a temperature control system. This temperature control system adjusts the distribution of heat from a heater by controlling the flow rate of at least one of the air-conditioning heat medium and the battery heat medium according to the battery temperature increase request, the room heating request, and the battery temperature. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-118569 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, when the heating is in operation, in order to ensure the thermal energy used for heating, the supply of thermal energy from the heater to the battery (electricity storage device) via the thermal medium may be restricted until the temperature of the heat medium heated by the heater exceeds a predetermined temperature.

[0005] When the heating load is high, such as when the outside temperature is low, the temperature of the heat medium heated by the heater may not exceed a predetermined temperature, and thermal energy from the heater may not be supplied to the battery.

[0006] In such cases, it is difficult to determine whether the reason the battery temperature is not rising is because the supply of thermal energy from the heater is concentrated on the heating side, or because a component related to the supply of thermal energy from the heater to the battery is faulty.

[0007] In consideration of the above, an object of the present invention is to provide a vehicle that can more easily determine whether or not a component related to the supply of thermal energy from a heater to a power storage device has failed. [Means for solving the problem]

[0008] A vehicle according to a first aspect includes a motor that is driven by electric power supplied from a power storage device and functions as a drive source when the vehicle is running, a heater that can supply thermal energy via a heat medium to an air conditioning device that supplies warm air to the interior of the vehicle and to the power storage device, a first circuit unit that can transfer the thermal energy to the air conditioning device by causing the heat medium heated by the heater to flow toward the air conditioning device, a second circuit unit that can transfer the thermal energy to the power storage device by causing the heat medium heated by the heater to flow toward the power storage device, a flow rate adjustment unit that can flow the heat medium flowing out of the heater into the first circuit unit and the second circuit unit and that can adjust a first flow rate of the heat medium flowing into the first circuit unit and a second flow rate of the heat medium flowing into the second circuit unit, and a control unit that controls the flow rate adjustment unit so that the second flow rate is limited to a first predetermined flow rate that is smaller than the first flow rate when the air conditioner is started up at a temperature equal to or lower than a predetermined temperature, determines that the second circuit unit is normal when the first temperature becomes equal to or higher than the first predetermined temperature within a predetermined time from the start of the air conditioner, and controls the flow rate adjustment unit to stop the flow of the heat medium into the second circuit unit, and determines that the second circuit unit is abnormal when the first temperature does not rise to the first predetermined temperature within the predetermined time from the start of the air conditioner, and controls the flow rate adjustment unit to stop the flow of the heat medium into the second circuit unit.

[0009] The vehicle according to the first aspect includes a motor, which is driven by power supplied from a power storage device and functions as a drive source when the vehicle is running. The power storage device is also supplied with thermal energy from a heater via a heat medium, which can stabilize the operation of the power storage device and, ultimately, the motor, when the outside air temperature is low.

[0010] The heater is also capable of supplying heat energy to an air conditioner in the same manner, so that the air conditioner can supply warm air to the interior of the vehicle.

[0011] Incidentally, when an air conditioner supplies warm air, in order to ensure the thermal energy used by the air conditioner, the supply of thermal energy from the heater to the power storage device via the heat medium may be restricted until the temperature of the heat medium heated by the heater exceeds a predetermined temperature.

[0012] When the load on the air conditioner is high, the temperature of the heat medium heated by the heater may not exceed a predetermined temperature, and thermal energy from the heater may not be supplied to the power storage device.

[0013] In such cases, it becomes difficult to determine whether the temperature of the storage device is not rising because the supply of thermal energy from the heater is concentrated on the air conditioning unit side, or because a component related to the supply of thermal energy from the heater to the storage device has failed.

[0014] In this embodiment, the system includes a first circuit section that can transfer thermal energy to the air conditioner by flowing the heat medium heated by the heater toward the air conditioner, a second circuit section that can transfer thermal energy to the power storage device by flowing the heat medium heated by the heater toward the power storage device, and a flow rate adjustment section that can adjust the flow rate of the heat medium flowing through these circuit sections.The control section controls the flow rate adjustment section and determines the state of the second circuit section based on the measurement result of the first thermometer for the heat medium flowing through the second circuit section.

[0015] In detail, the flow rate adjusting unit is capable of causing the heat medium flowing out from the heater to flow into the first circuit unit and the second circuit unit, and is configured to adjust the first flow rate of the heat medium flowing into the first circuit unit and the second flow rate of the heat medium flowing into the second circuit unit.

[0016] On the other hand, the first thermometer measures a first temperature of the heat medium immediately before supplying thermal energy to the power storage device in the second circuit portion.

[0017] The control unit controls the flow rate adjusting unit so that the second flow rate is limited to a first predetermined flow rate that is smaller than the first flow rate when the air conditioner is started at a temperature below a predetermined temperature. Therefore, in this aspect, even when the temperature is below the predetermined temperature, thermal energy from the heater is supplied not only to the air conditioner but also to the power storage device.

[0018] In other words, in this embodiment, if there is no abnormality in the second circuit section that transmits thermal energy from the heater to the power storage device, the first temperature measured by the first thermometer will rise, and if there is an abnormality in the second circuit section, the first temperature measured by the first thermometer will not change.

[0019] Then, when the first temperature becomes equal to or higher than the first predetermined temperature within a predetermined time from the start of the air conditioning device, the control unit determines that the second circuit unit is normal, and controls the flow rate adjustment unit to stop the flow of heat medium into the second circuit unit.

[0020] In addition, the control unit determines that the second circuit unit is abnormal when the first temperature does not rise to the first predetermined temperature within a predetermined time from the start of the air conditioning device, and controls the flow rate adjustment unit to stop the flow of heat medium into the second circuit unit.

[0021] In this manner, in this aspect, it is possible to determine whether or not there is an abnormality in the second circuit section within a predetermined time from the start-up of the air conditioner, and after this determination is completed, the thermal energy from the heater can be concentrated in the air conditioner.

[0022] The vehicle according to the second aspect is the vehicle according to the first aspect, further comprising a second thermometer capable of measuring a second temperature of the heat medium immediately after it flows out of the heater, and the control unit controls the flow rate adjustment unit so that the second flow rate becomes a second predetermined flow rate that is greater than the first predetermined flow rate when the second temperature is equal to or greater than a second predetermined temperature that is higher than the first predetermined temperature.

[0023] In the vehicle according to the second aspect, the second temperature of the heat medium immediately after it flows out of the heater can be measured by the second thermometer.

[0024] In this aspect, when the second temperature is equal to or higher than a second predetermined temperature that is higher than the first predetermined temperature, the control unit controls the flow rate adjustment unit so that a second flow rate of the heat medium flowing through the second circuit unit that transfers thermal energy from the heater to the power storage device becomes a second predetermined flow rate that is greater than the first predetermined flow rate.

[0025] Therefore, in this aspect, the second flow rate of the heat medium flowing through the second circuit portion is increased as the second temperature of the heat medium increases immediately after it has flowed out of the heater, thereby accelerating the temperature increase of the electricity storage device. [Effects of the Invention]

[0026] As described above, the vehicle according to the present invention has the excellent effect of being able to more easily determine whether or not a component related to the supply of thermal energy from the heater to the power storage device has failed. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a block diagram showing a hardware configuration of a vehicle according to an embodiment of the present invention; [Figure 2] 2 is a block diagram showing the relationship between a control unit mounted on a vehicle according to the present embodiment and its peripheral devices; FIG. [Figure 3] 4 is a flowchart illustrating an example of processing performed by a control unit mounted on the vehicle according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0028] An example of an embodiment of a vehicle according to the present invention will be described below with reference to Figures 1 to 3. As shown in Figure 1, a "vehicle 10" according to this embodiment includes a "motor 12," a "battery device 14" as an electricity storage device, an "air conditioning device 16," a "water heater 18" as a heater, a "flow rate adjustment valve 20" as a flow rate adjustment unit, a heat exchanger 22, a "first thermometer 24," and a "second thermometer 26."

[0029] The motor 12 functions as a drive source when the vehicle 10 is running, and also functions as a generator, thereby being capable of generating regenerative braking force.

[0030] The battery device 14 is capable of supplying power to the motor 12 and being charged by regenerative power from the motor 12. The battery device 14 is also capable of supplying power to a water heater 18, as will be described later.

[0031] The air conditioning unit 16 is equipped with a heater core 16A, and as described below, is capable of supplying warm air to the interior (cabin) of the vehicle 10 by heating the air flowing from a blower section (not shown) with thermal energy supplied from a water heater 18.

[0032] The water heater 18 is capable of heating coolant (not shown) as a heat medium that flows through a "circuit section 28" that serves as a first circuit section connecting the heater core 16A, the water heater 18, the flow rate adjustment valve 20, and the heat exchanger 22, using power supplied from the battery device 14. The coolant flowing through the circuit section 28 is pumped by a pump 30 and flows to the flow rate adjustment valve 20 side via the water heater 18.

[0033] In detail, the coolant heated by the water heater 18 is branched by the flow control valve 20 into one flowing to the heater core 16A side and the other flowing to the heat exchanger 22 side, and thermal energy is supplied from the water heater 18 to the heater core 16A and the heat exchanger 22 via the coolant.

[0034] In addition, the flow control valve 20 is also connected to a circuit section 34 through which coolant for cooling the engine 32 flows, and the flow control valve 20 is configured so that coolant heated by the water heater 18 and coolant heated by the engine 32 flow into it.

[0035] In addition, the flow rate control valve 20 is controlled by the "control unit 36" as described below, so that the "first flow rate F1" of the coolant flowing to the heater core 16A side and the "second flow rate F2" of the coolant flowing to the heat exchanger 22 side can be adjusted.

[0036] The heat exchanger 22 is configured to exchange thermal energy between the coolant flowing through the "circuit section 38" that connects the flow control valve 20 with the downstream side of the heater core 16A in the circuit section 28 and the upstream side of the pump 30, and the coolant flowing through the "circuit section 40" that is connected to a heating pipe (not shown) provided in the battery device 14.

[0037] In other words, the thermal energy from the water heater 18 is also supplied to the battery device 14 via the heat exchanger 22, the circuit section 38, and the circuit section 40, and the circuit section 38 and the circuit section 40 function as a second circuit section. The coolant flowing through the circuit section 40 is pumped by a pump 42, and the output of the pump 42 can be controlled by the control section 36.

[0038] The first thermometer 24 is disposed relative to the circuit unit 40 and is capable of measuring a "first temperature T1" of the coolant in the circuit unit 40 immediately before supplying thermal energy to the battery device 14. The measurement data of the first thermometer 24 is transmitted to the control unit 36.

[0039] The second thermometer 26 is disposed relative to the circuit section 28 and is capable of measuring the "second temperature T2" ​​of the coolant immediately after it flows out of the water heater 18. The measurement data of the second thermometer 26 is transmitted to the control section 36.

[0040] Here, the present embodiment is characterized in that the control unit 36 ​​is capable of diagnosing faults in the circuit unit 40, etc., during cold start of the motor 12, etc. The configuration of the control unit 36 ​​will be described in detail below.

[0041] 2, the control unit 36 ​​includes a central processing unit (CPU) 36A, a read-only memory (ROM) 36B, a random access memory (RAM) 36C, a storage 36D, and an input / output interface (I / F) 36E. The CPU 36A, the ROM 36B, the RAM 36C, the storage 36D, and the input / output interface 36E are connected to each other via a bus 36F so as to be able to communicate with each other.

[0042] The CPU 36A is a central processing unit that can control various devices by executing various programs. Specifically, the CPU 36A reads programs from the ROM 36B and executes the programs using the RAM 36C as a work area. The CPU 36A reads and executes the execution programs stored in the ROM 36B, enabling the control unit 36 ​​to perform various functions, as will be described later.

[0043] More specifically, the ROM 36B stores various programs and data relating to the control of the flow rate adjustment valve 20 and the pump 42. On the other hand, the RAM 36C is capable of temporarily storing programs or data as a working area.

[0044] The storage 36D includes a hard disk drive (HDD) or a solid state drive (SSD), and is capable of storing various programs including an operating system and various data.

[0045] The input / output I / F 36E is an interface that enables the control unit 36 ​​to communicate with various devices mounted on the vehicle 10. The control unit 36 ​​is connected to each device described below via the input / output I / F 36E so that they can communicate with each other.

[0046] Specifically, the devices connected to the control unit 36 ​​include the motor 12, the water heater 18, the flow control valve 20, the first thermometer 24, the second thermometer 26, the engine 32, the pump 42, and an outside air thermometer 44 capable of measuring the outside air temperature of the vehicle 10.

[0047] When a passenger operates a power switch (not shown), the control unit 36 ​​starts the motor 12, the battery 14, and the engine 32. At this time, measurement data of the temperature of the battery 14 measured by a battery thermometer (not shown) provided in the battery 14 is transmitted to the control unit 36.

[0048] In this embodiment, when an occupant operates an air conditioning switch (not shown), the air conditioning device 16 starts up, and when it is assumed that the battery device 14 is in an extremely low temperature state, for example, when the outside air temperature measured by the outside air thermometer 44 is -10°C or higher and the temperature of the battery device 14 measured by the battery thermometer 44 is 10°C or lower (or when the outside air temperature measured by the outside air thermometer 44 is 10°C or lower), the control unit 36 ​​transitions to a temperature rise detection mode. The outside air temperature and the set temperature of the battery device 14 when the control unit 36 ​​transitions to the temperature rise detection mode can be changed as appropriate.

[0049] More specifically, in the temperature rise detection mode, the control unit 36 ​​first controls the flow rate adjustment valve 20 so that the second flow rate F2 of the coolant flowing from the flow rate adjustment valve 20 to the circuit unit 38 side is limited to a "first predetermined flow rate F3" that is smaller than the first flow rate F1 of the coolant flowing from the flow rate adjustment valve 20 to the circuit unit 28 side. Specifically, when the coolant flowing from the flow rate adjustment valve 20 to the circuit unit 28 side is limited to the first predetermined flow rate F3, the control unit 36 ​​sets the valve opening degree of the flow rate adjustment valve 20 on the circuit unit 38 side to 10 to 15 degrees and sets the duty ratio of the pump 42 to 35 to 45%.

[0050] At this time, the control unit 36 ​​also acquires measurement data of the first temperature T1 of the coolant flowing through the circuit unit 40 measured by the first thermometer 24 as an initial value T0 of the first temperature T1.

[0051] Next, the control unit 36 ​​compares the measurement data of the first temperature T1 with the initial value T0 after a predetermined time M (for example, 10 minutes) has elapsed since the start-up of the device. If the first temperature T1 has risen by 5°C or more from the initial value T0, that is, if the first temperature T1 is equal to or higher than a "first predetermined temperature T3" that is 5°C higher than the initial value T0, the control unit 36 ​​determines that the circuit units 38 and 40 are normal and transitions to the heating priority mode. At this time, the control unit 36 ​​controls the flow rate adjustment valve 20 to stop the coolant from flowing from the flow rate adjustment valve 20 to the circuit unit 38 side.

[0052] Furthermore, in the heating priority mode, when the second temperature T2 measured by the second thermometer 26 is equal to or higher than a "second predetermined temperature T4 (for example, 60°C)" that is higher than the first predetermined temperature T3, the control unit 36 ​​transitions to the battery heating mode. Specifically, in the battery heating mode, the control unit 36 ​​sets the valve opening on the circuit unit 38 side of the flow rate adjustment valve 20 to the maximum, sets the duty ratio of the pump 42 to the maximum, and controls the flow rate adjustment valve 20 so that the second flow rate F2 becomes a "second predetermined flow rate F4" that is higher than the first predetermined flow rate F3.

[0053] On the other hand, if the first temperature T1 has not risen by 5°C or more from the initial value T0, that is, if the first temperature T1 has not reached the first predetermined temperature T3, the control unit 36 ​​determines that at least one of the circuit units 38 and 40 is abnormal, and sends an alarm to a monitor, terminal, or the like (not shown). At this time, the control unit 36 ​​controls the flow rate adjustment valve 20 to stop the coolant from flowing from the flow rate adjustment valve 20 to the circuit unit 38 side.

[0054] (Actions and Effects of This Embodiment) Next, the operation and effects of this embodiment will be described.

[0055] 1, the present embodiment includes a motor 12, which is driven by power supplied from a battery device 14 and functions as a drive source when the vehicle 10 is running. In addition, the battery device 14 is supplied with thermal energy from a water heater 18 via coolant, which can stabilize the operation of the battery device 14 and, ultimately, the motor 12, when the outside air temperature is low, for example.

[0056] The water heater 18 is also capable of supplying heat energy to the air conditioner 16 in the same manner, so that the air conditioner 16 can supply warm air to the interior of the vehicle 10 .

[0057] However, when the air conditioning unit 16 supplies warm air, in order to ensure the thermal energy used by the air conditioning unit 16, the supply of thermal energy from the water heating heater 18 to the battery unit 14 via the coolant may be restricted until the temperature of the coolant heated by the water heating heater 18 exceeds a predetermined temperature.

[0058] When the load on the air conditioning device 16 is high, the temperature of the coolant heated by the water heater 18 may not exceed a predetermined temperature, and thermal energy from the water heater 18 may not be supplied to the battery device 14.

[0059] In such a case, it becomes difficult to determine whether the temperature of the battery device 14 does not rise because the supply of thermal energy from the water heating heater 18 is concentrated on the air conditioning device 16 side, or because a component related to the supply of thermal energy from the water heating heater 18 to the battery device 14 has failed.

[0060] Here, in this embodiment, the system is equipped with a circuit section 28 that can transfer thermal energy to the air conditioning device 16 by flowing the coolant heated by the water heating heater 18 to the air conditioning device 16 side, a circuit section 38 that can transfer thermal energy to the battery device 14 by flowing the coolant heated by the water heating heater 18 to the battery device 14 side, and a flow control valve 20 that can adjust the flow rate of the coolant flowing through these circuit sections.

[0061] The control unit 36 ​​controls the flow control valve 20 and determines the state of the circuit unit 38 and the circuit unit 40 based on the measurement results of the first thermometer 24 for the coolant flowing through the circuit unit 40 to which thermal energy is supplied from the circuit unit 38 via the heat exchanger 22.

[0062] 3, a control flow relating to the fault diagnosis of the circuit units 38 and 40 by a program executed by the CPU 36A will be described. This control flow starts when the CPU 36A receives an input from an occupant operating an air conditioning switch.

[0063] When this control flow starts, in step S100, the CPU 36A determines whether the battery 14 is in an extremely low temperature state, that is, whether the outside air temperature is −10° C. or higher and the temperature of the battery 14 is 10° C. or lower (or whether the outside air temperature measured by the outside air thermometer 44 is 10° C. or lower), based on the measurement data of the outside air thermometer 44 and the battery thermometer. If the CPU 36A determines that the battery 14 is in an extremely low temperature state (step S100: YES), the CPU 36A proceeds to step S101, and if the CPU 36A determines that the battery 14 is not in an extremely low temperature state (step S100: NO), the CPU 36A ends the control flow.

[0064] In step S101, the CPU 36A transitions to a temperature rise detection mode. Specifically, the CPU 36A controls the flow rate adjustment valve 20 so that the second flow rate F2 of the coolant flowing from the flow rate adjustment valve 20 to the circuit unit 38 side is limited to a first predetermined flow rate F3 that is smaller than the first flow rate F1 of the coolant flowing from the flow rate adjustment valve 20 to the circuit unit 38 side, and then proceeds to step S102.

[0065] In step S102, CPU 36A acquires measurement data of first temperature T1 of the coolant measured by first thermometer 24 immediately before supplying thermal energy to battery device 14 in circuit unit 40 as initial value T0 of first temperature T1, and proceeds to step S103.

[0066] In step S103, the CPU 36A compares the measurement data of the first temperature T1 with the initial value T0 after a predetermined time M has elapsed since the air conditioning switch was operated, and determines whether the first temperature T1 has risen by 5° C. or more from the initial value T0. If the first temperature T1 has risen by 5° C. or more from the initial value T0 (step S103: YES), the CPU 36A determines that the circuit units 38 and 40 are normal, and proceeds to step S104.

[0067] On the other hand, if the first temperature T1 has not risen by 5°C or more from the initial value T0 (step S103: NO), the CPU 36A determines that at least one of the circuit unit 38 and the circuit unit 40 is abnormal, and controls the flow control valve 20 to stop the flow of coolant from the flow control valve 20 to the circuit unit 38 side, and proceeds to step S106.

[0068] In step S104, the CPU 36A shifts to the heating priority mode, controls the flow rate adjustment valve 20 to stop the coolant from flowing from the flow rate adjustment valve 20 to the circuit unit 38 side, and concentrates the supply of thermal energy from the water heater 18 to the heater core 16A side. Then, when the second temperature T2 measured by the second thermometer 26 is 60°C or higher, the CPU 36A proceeds to step S105.

[0069] In step S105, the CPU 36A transitions to the battery temperature increase mode, sets the valve opening degree on the circuit section 38 side of the flow control valve 20 to the maximum so that the second flow rate F2 becomes a second predetermined flow rate F4 that is greater than the first predetermined flow rate F3, sets the duty ratio of the pump 42 to the maximum, and ends the above control flow.

[0070] In step S106, the CPU 36A sends an alarm to a monitor, a terminal, or the like, and controls the flow rate adjustment valve 20 to stop the coolant from flowing from the flow rate adjustment valve 20 to the circuit unit 38 side, and then ends the above control flow.

[0071] In this manner, in this embodiment, it is possible to more easily determine whether or not a component related to the supply of thermal energy from the water heater 18 to the battery device 14 has failed.

[0072] In addition, in this embodiment, as the second temperature T2 of the coolant increases immediately after it flows out of the water heating heater 18, the second flow rate F2 of the coolant flowing through the circuit section 38 and the circuit section 40 is increased, thereby accelerating the temperature rise of the battery device 14. [Explanation of symbols]

[0073] 10 vehicles 12 motors 14 Battery device (electricity storage device) 16 Air conditioner 18 Water heater (heater) 20 Flow control valve (flow control part) 24 1st thermometer 26 Second thermometer 28 Circuit section (1st circuit section) 36 Control Unit 38 Circuit section (2nd circuit section) 40 Circuit section (2nd circuit section)

Claims

1. a motor that is driven by electric power supplied from the power storage device and functions as a drive source when the vehicle is running; an air conditioner that supplies warm air to the interior of the vehicle and a heater that can supply thermal energy to the power storage device via a heat medium; a first circuit portion that allows the heat medium heated by the heater to flow toward the air conditioner, thereby transferring the thermal energy to the air conditioner; a second circuit portion configured to cause the heat medium heated by the heater to flow toward the power storage device, thereby transmitting the thermal energy to the power storage device; a flow rate adjusting unit that allows the heat medium flowing out of the heater to flow into the first circuit unit and the second circuit unit, and that adjusts a first flow rate of the heat medium flowing into the first circuit unit and a second flow rate of the heat medium flowing into the second circuit unit; a first thermometer capable of measuring a first temperature of the heat medium in the second circuit portion immediately before the heat energy is supplied to the power storage device; a control unit that controls the flow rate adjustment unit so that the second flow rate is limited to a first predetermined flow rate that is smaller than the first flow rate when the air conditioner is started up at a temperature equal to or lower than a predetermined temperature, determines that the second circuit unit is normal when the first temperature becomes equal to or higher than the first predetermined temperature within a predetermined time from the start of the air conditioner, and controls the flow rate adjustment unit to stop the flow of the heat medium into the second circuit unit, and determines that the second circuit unit is abnormal when the first temperature does not rise to the first predetermined temperature within the predetermined time from the start of the air conditioner, and controls the flow rate adjustment unit to stop the flow of the heat medium into the second circuit unit; A vehicle having:

2. a second thermometer capable of measuring a second temperature of the heat medium immediately after it has flowed out of the heater; the control unit controls the flow rate adjustment unit so that the second flow rate becomes a second predetermined flow rate that is greater than the first predetermined flow rate when the second temperature is equal to or greater than a second predetermined temperature that is higher than the first predetermined temperature. The vehicle of claim 1 .

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