Air conditioning system for vehicle

Abstract

To provide an air conditioning system for a vehicle capable of efficiently performing air-conditioning of a cabin and temperature-control of a seat during pre-air conditioning of the cabin.SOLUTION: A control device 3 comprises: a pre-air conditioning determination unit 31 that determines whether or not pre-air conditioning for performing air-conditioning in a cabin before an occupant enters a vehicle has been started; an inside / outside temperature difference acquisition unit 32 that acquires a value of a temperature difference between an air-conditioning target temperature inside the cabin and an outside air temperature; a cabin air-conditioning operation mode selection unit 34 that selects a seat temperature control priority mode in which the air is blown out of, among a plurality of cabin blowout ports in the cabin air-conditioning unit 1, the cabin blowout port closest in a height direction to a seat suction port in communication with a suction side end in a ventilation path of a seat temperature control unit 2 if pre-air conditioning has been started and the value of the temperature difference is equal to or greater than a predetermined value; and a seat temperature control activation instruction unit 35 that activates the seat temperature control unit at least if the seat temperature control priority mode has been selected.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a vehicle air conditioning system mounted on a vehicle.

Background Art

[0002] In vehicles such as automobiles, an air conditioning device called, for example, HVAC (Heating Ventilation and Air-Conditioning) is provided, and air conditioning in the vehicle interior is performed. In HVAC, not only the temperature and humidity of the air blown into the vehicle interior are adjusted, but also the blowing position of the air can be adjusted, so that the vehicle interior can be kept in a comfortable state.

[0003] By the way, in such an air conditioning device provided in a vehicle, there may be a case where a so-called "pre-air conditioning" function for starting the air conditioning in the vehicle interior before the occupant gets into the vehicle is provided. And in the invention described in Patent Document 1, in such pre-air conditioning, the temperature of the seating surface of the seat is adjusted by blowing air-conditioning air from the seat, and the comfort of the occupant is improved.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, for example, when the vehicle is left unused for a long time in high temperature in summer or low temperature in winter, the seat accumulates heat, and this heat accumulation affects the air conditioning in the vehicle interior, not only taking time to reach a comfortable temperature in the vehicle interior, but also taking time for temperature adjustment of the seat itself due to heat accumulation on the seat, and there is a problem that the comfort of the occupant cannot be sufficiently ensured.

[0006] Therefore, the present invention provides a vehicle air conditioning system capable of efficiently conditioning the air in the passenger compartment and the temperature of the seat during pre-conditioning of the passenger compartment.

Means for Solving the Problems

[0007] A vehicle air conditioning system according to an aspect of the present invention includes a passenger compartment air conditioning unit that blows conditioned air toward the passenger compartment of the vehicle and includes a plurality of passenger compartment air outlets provided at least at different positions in the height direction of the passenger compartment from each other, and conditions the air in the passenger compartment, and a seat temperature control unit that includes a ventilation path that sucks air in the passenger compartment from a suction side end communicating with a seat suction port in the passenger compartment and blows it out from a blowout side end communicating with a seat air outlet in the passenger compartment, and controls the temperature of the seat in the passenger compartment, and a control device that controls the passenger compartment air conditioning unit and the seat temperature control unit, wherein the control device includes a pre-conditioning determination unit that determines whether pre-conditioning for conditioning the passenger compartment by the passenger compartment air conditioning unit has been started before a passenger gets on the vehicle, an internal and external temperature difference acquisition unit that acquires a value of a temperature difference between an air conditioning target temperature in the passenger compartment and an outside air temperature, and a passenger compartment air conditioning operation mode selection unit that selects a seat temperature control priority mode in which air is blown out from the passenger compartment air outlet closest to the seat suction port in the height direction among the plurality of passenger compartment air outlets in the passenger compartment air conditioning unit when the pre-conditioning has been started and the value of the temperature difference is equal to or greater than a predetermined value, and a seat temperature control operation instruction unit that operates the seat temperature control unit at least when the seat temperature control priority mode is selected.

[0008] In the seat temperature control unit of the vehicle air conditioning system, the suction side end in the ventilation path may communicate with the seat suction port provided below the seat surface of the seat, and the blowout side end in the ventilation path may communicate with the seat air outlet formed on the surface of the seat.

[0009] In the seat temperature control unit of the vehicle air conditioning system, the blowing side end in the ventilation passage communicates with the seat air outlet provided below the seat surface of the seat, and the suction side end in the ventilation passage may communicate with the seat suction port formed on the surface of the seat.

[0010] In the vehicle air conditioning system, the control device further has a seat information acquisition unit that acquires seat identification information for identifying the seat on which the occupant is scheduled to ride among the plurality of seats, and the seat temperature control operation instruction unit may cause the seat air conditioning unit to perform temperature control only on the seat identified by the seat information acquisition unit.

[0011] In the vehicle air conditioning system, the control device further has a seat temperature acquisition unit that acquires the temperature of the seat, and the vehicle compartment air conditioning operation mode selection unit may switch to an operation mode other than the seat temperature control priority mode when the temperature of the seat is below a predetermined temperature control target value during cooling by the vehicle compartment air conditioning unit or when the temperature of the seat is above the predetermined temperature control target value during heating by the vehicle compartment air conditioning unit after selecting the seat temperature control priority mode.

[0012] In the vehicle air conditioning system, the control device may further have a seat temperature control stop instruction unit that stops the operation of the seat temperature control unit when the temperature of the seat is below a predetermined temperature control target value during cooling or when the temperature of the seat is above the predetermined temperature control target value during heating.

[0013] In the vehicle air conditioning system, the control device further has a seat temperature control restart signal detection unit that detects a seat temperature control restart signal for starting the temperature control of the seat, and the vehicle compartment air conditioning operation mode selection unit may reselect the seat temperature control priority mode when the seat temperature control restart signal detection unit detects the seat temperature control restart signal while an operation mode other than the seat temperature control priority mode is selected.

Advantages of the Invention

[0014] According to the vehicle air conditioning system described above, it is possible to efficiently perform air conditioning of the passenger compartment and temperature control of the seat during pre-air conditioning in the passenger compartment.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0016] Hereinafter, the vehicle air conditioning system 100 according to an embodiment of the present invention will be described. As shown in FIG. 1, the vehicle air conditioning system 100 is mounted on a vehicle such as an automobile, and is a device for performing air conditioning in the passenger compartment A and temperature control of the seat SE for the passenger.

[0017] (Overall Configuration) Specifically, the vehicle air conditioning system 100 includes a passenger compartment air conditioning unit 1 that performs air conditioning in the passenger compartment A, a seat temperature control unit 2 that performs temperature control of the seat SE, and a control device (ECU: Electronic Control Unit) 3 that controls the passenger compartment air conditioning unit 1 and the seat temperature control unit 2.

[0018] (Passenger Compartment Air Conditioning Unit) The passenger compartment air conditioning unit 1 cools or heats the interior of the passenger compartment A by blowing conditioned air into the passenger compartment A. Although the description of the specific configuration is omitted, the passenger compartment air conditioning unit 1 is composed of an HVAC (Heating Ventilation and Air-Conditioning) 1x. In the HVAC 1x, the air taken in by a blower (not shown) is cooled by an evaporator and / or heated by a heater core, and then supplied into the passenger compartment A. The passenger compartment air conditioning unit 1 has at least a face air outlet 10a provided at a position corresponding to the upper body of the occupant sitting on the seat SE in front of each of the driver's seat and the front passenger's seat, and a foot air outlet 10b provided at a position corresponding to the feet of the occupant sitting on the seat SE in front of each of the driver's seat and the front passenger's seat. That is, the passenger compartment air conditioning unit 1 has at least a plurality of air outlets 10 for the passenger compartment provided at positions different from each other in the height direction of the passenger compartment A. The flow rates of the air blown out from the face air outlet 10a and the foot air outlet 10b are adjusted by operating a damper (not shown) in the HVAC 1x by a control device 3, which will be described in detail later.

[0019] (Seat temperature control unit) The seat temperature control units 2 are provided one by one on each of the driver's seat, the front passenger's seat, and the rear seats. Each seat temperature control unit 2 has a blower 20 provided inside a support leg B that supports the seat from below, and a ventilation passage 21 disposed inside the support leg B and communicating with the blower 20. The suction side end 21a, which is the end on the air suction side (the upstream side in the air flow direction) in the ventilation passage 21, communicates with a seat suction port Ba that opens in front of the support leg B. Therefore, the seat suction port Ba is provided below the seat surface Fa of the seat SE.

[0020] In addition, the blowing-side end 21b, which is the end on the air-blowing side (downstream side in the air flow direction) in the ventilation passage 21 of the seat temperature control unit 2, communicates with the inside space SP of the seat SE with respect to the seat air outlets SEa, which are a plurality of through-holes formed at intervals on the seating surface Fa and the back surface Fb that are the surfaces of the seat SE. As a result, the air in the passenger compartment A is taken into the ventilation passage 21 by the blower 20 from the seat suction port Ba and then blown out from the seat air outlets SEa, that is, from the surface of the seat SE.

[0021] (Control device) The control device 3 is composed of a microcomputer including a microprocessor or the like. As shown in FIG. 2, the control device 3 has a pre-air conditioning execution unit 30, a pre-air conditioning determination unit 31, an inside-outside temperature difference acquisition unit 32, a heating and cooling determination unit 33, a passenger compartment air conditioning operation mode selection unit 34, and a seat temperature control operation instruction unit 35.

[0022] The pre-air conditioning execution unit 30 causes the pre-air conditioning to be performed by the passenger compartment air conditioning unit 1. Here, "pre-air conditioning" means the air conditioning in the passenger compartment A that is started before the occupant gets into the vehicle. The pre-air conditioning execution unit 30 operates the blower of the HVAC1x, for example, when receiving a pre-air conditioning request signal transmitted by a remote controller before the occupant gets into the vehicle or when receiving a pre-air conditioning request signal from a timer set in advance by the occupant, and executes the pre-air conditioning.

[0023] The pre-air conditioning determination unit 31 determines whether the pre-air conditioning has been started.

[0024] The inside-outside temperature difference acquisition unit 32 acquires the value of the temperature difference ΔT between the air conditioning target temperature (the set temperature of the air conditioning) in the passenger compartment A and the outside air temperature. That is, the inside-outside temperature difference acquisition unit 32 acquires the value of the temperature difference ΔT by calculating the temperature difference ΔT (absolute value) using the measured value of an outside air temperature sensor (not shown) provided in the vehicle.

[0025] The heating and cooling determination unit 33 determines whether the pre-air conditioning by the vehicle interior air conditioning unit 1 is cooling or heating. Here, the cooling state indicates a condition where "outside air temperature > air conditioning target temperature", and the heating state indicates a condition where "outside air temperature < air conditioning target temperature".

[0026] The vehicle interior air conditioning operation mode selection unit 34 selects the operation mode of the vehicle interior air conditioning unit 1. In the present embodiment, the vehicle interior air conditioning operation mode selection unit 34 switches between the seat temperature control priority mode M1 and other operation modes M2 based on predetermined conditions described later. Here, the "seat temperature control priority mode M1" is an operation mode in which air is blown out only from the foot air outlet 10b closest to the seat suction port Ba communicating with the suction side end 21a of the seat temperature control unit 2, and the "operation mode M2 other than the seat temperature control priority mode M1" is an operation mode in which the air blowing position is not particularly restricted, for example, the automatic air conditioning operation mode (a mode in which the air blowing position is appropriately changed according to the temperature distribution in the vehicle interior A, etc.).

[0027] The seat temperature control operation instruction unit 35 operates the blower 20 of the seat temperature control unit 2 to perform temperature control of the seat SE at least when the seat temperature control priority mode M1 is selected by the vehicle interior air conditioning operation mode selection unit 34.

[0028] (Control Flow) Next, with reference to FIG. 3, the control flow by the control device 3 will be described. First, step S1 of determining whether the pre-air conditioning has started is executed. If the pre-air conditioning has started in step S1, it is determined as "YES" and the process proceeds to step S2. On the other hand, if the pre-air conditioning has not started, it is determined as "NO", the temperature control of the seat SE is not performed, and the air conditioning of the vehicle interior A is not performed either.

[0029] After determining "YES" in step S1, in step S2, it is determined whether the temperature difference ΔT between the air conditioning target temperature in the passenger compartment A and the outside air temperature is equal to or greater than a predetermined value α. If the temperature difference ΔT is equal to or greater than the predetermined value α in step S2, it is determined "YES" and the process proceeds to step S3. On the other hand, if the temperature difference ΔT is less than the predetermined value, it is determined "NO", and while the air conditioning in the passenger compartment A is continued from the pre-air conditioning and the passenger compartment air conditioning unit 1 is operated in the above-described operation mode M2, the temperature control of the seat SE is not performed.

[0030] After determining "YES" in step S2, step S3 is executed. In step S3, it is determined whether the cooling by the passenger compartment air conditioning unit 1 is being performed. If it is in the cooling state, it is determined "YES". In this case, as the operation mode of the passenger compartment air conditioning unit 1, the seat temperature control priority mode M1 is selected. That is, air is blown out from the passenger compartment air outlet 10 closest to the suction side end 21a in the ventilation path 21 of the seat temperature control unit 2 among the plurality of passenger compartment air outlets in the passenger compartment air conditioning unit 1. In the seat temperature control priority mode M1 of the present embodiment, air is blown out only from the foot air outlet 10b, and the blowing of air from the face air outlet 10a is stopped. And at this time, the output of the blower 20 of the seat temperature control unit 2 is maximized, and the blower 20 is operated for a preset predetermined time.

[0031] On the other hand, if it is determined "NO" in step S3, the process proceeds to step S4. In step S4, it is determined whether the heating by the passenger compartment air conditioning unit 1 is being performed. If it is in the heating state, it is determined "YES". In this case, as the operation mode of the passenger compartment air conditioning unit 1, the seat temperature control priority mode M1 is selected, the output of the blower 20 of the seat temperature control unit 2 is maximized, and the blower 20 is operated for a preset predetermined time. If it is determined "NO" in step S4, while the air conditioning in the passenger compartment A is continued from the pre-air conditioning and the passenger compartment air conditioning unit 1 is operated in the operation mode M2, the temperature control of the seat SE is not performed.

[0032] (Function and effect) According to the vehicle air conditioning system 100 of the present embodiment described above, when it is determined that seat temperature control is necessary in a state where pre-air conditioning is being performed, the seat temperature control priority mode M1 is selected, and air from the passenger compartment air conditioning unit 1 can be blown out from a position close to the seat suction port Ba that communicates with the suction side end 21a of the ventilation path 21 of the seat temperature control unit 2. Therefore, the air temperature-controlled by the passenger compartment air conditioning unit 1 can be efficiently sent into the seat temperature control unit 2, and the seat temperature control effect of the seat SE can be enhanced. As a result, even if the vehicle is left unattended for a long time and the seat SE itself has stored heat, it is possible to efficiently perform air conditioning of the passenger compartment A and temperature control of the seat SE during pre-air conditioning in the passenger compartment A. Therefore, it leads to an improvement in the comfort of the occupant when sitting.

[0033] Further, in the seat temperature control unit 2, air in the passenger compartment A is sucked through the seat suction port Ba provided below the seat surface Fa of the seat SE, and the sucked air is blown out through the seat surface Fa and the back surface Fb that form the surface of the seat SE. Therefore, the surface of the seat SE can be efficiently heated or cooled using the air temperature-controlled by the passenger compartment air conditioning unit 1.

[0034] Here, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention. For example, contrary to the above case, the suction side end 21a of the ventilation path 21 of the seat temperature control unit 2 may communicate with a seat suction port formed by a plurality of through holes spaced apart from each other on the surface (for example, the seat surface Fa and the back surface Fb) of the seat SE, and the blowing side end 21b of the ventilation path 21 may communicate with a seat suction port provided below the seat surface Fa of the seat SE.

[0035] Also, the seat suction port Ba and the seat blowing port SEa do not necessarily have to be provided at the above-described positions. For example, the seat blowing port SEa is not limited to the case of blowing air from the surface of the seat SE, and may be arranged to blow air toward the surface of the seat SE.

[0036] Also, as shown in FIG. 4, the control device 3 may further include a seat identification information acquisition unit 36 in addition to the above-described configuration. The seat identification information acquisition unit 36 acquires seat identification information for identifying the seat SE on which the occupant plans to board among the seats SE of the driver's seat, the front passenger seat, and the rear seats. The signal of the seat identification information is transmitted to the seat identification information acquisition unit 36, for example, based on an operation by the occupant using a remote controller.

[0037] When the seat SE on which the occupant plans to board is identified by the seat identification information acquisition unit 36, only the seat temperature control unit 2 in the identified seat SE is operated to control the temperature of only the identified seat SE. On the other hand, when the seat SE on which the occupant plans to board is not identified, that is, when the seat identification information is not acquired, for example, only the seat temperature control unit 2 of the driver's seat may be operated. In this case, by controlling the temperature of only the identified seat SE, the power consumption of the blower 20 of the seat temperature control unit 2, which is the power for temperature control of all the seat SEs, can be suppressed compared to the case where the temperature of all the seat SEs is controlled. Also, even if the seat SE is not identified, it is possible to suppress the power consumption of the seat temperature control unit 2 by operating only the seat temperature control unit 2 of the driver's seat.

[0038] Further, the control device 3 may further include a seat temperature acquisition unit 37, a seat temperature control stop instruction unit 38, and a seat temperature control restart signal detection unit 39.

[0039] The seat temperature acquisition unit 37 acquires the measured value of the temperature of the seat (for example, the temperature of the seat surface) measured by a seat temperature sensor (not shown). This seat temperature sensor is provided, for example, one by one on each of the seats SE of the driver's seat, the front passenger seat, and the rear seats.

[0040] When the temperature of the seat SE is below a predetermined temperature control target value during cooling by the vehicle cabin air conditioning unit 1, or when the temperature of the seat SE is above a predetermined temperature control target value during heating by the vehicle cabin air conditioning unit 1, the seat temperature control stop instruction unit 38 stops the operation of the blower 20 in the seat temperature control unit 2.

[0041] The seat temperature control restart signal detection unit 39 detects a seat temperature control restart signal for restarting the temperature control of the seat SE by the seat temperature control unit 2. This seat temperature control restart signal is transmitted to the seat temperature control restart signal detection unit 39 based on, for example, an operation by the passenger's remote controller, an operation of the in-vehicle control panel by the passenger, an unlocking operation of the vehicle by the passenger, or the position information of the vehicle key.

[0042] Then, when the temperature of the seat SE is below a predetermined temperature control target value during cooling, or when the temperature of the seat SE is above a predetermined temperature control target value during heating, it switches to an operation mode M2 other than the seat temperature control priority mode M1. After the operation mode of the vehicle cabin air conditioning unit 1 is switched to an operation mode M2 other than the seat temperature control priority mode M1, the temperature control of the seat SE is stopped by stopping the operation of the blower 20 of the operating seat temperature control unit 2. Thereafter, when a seat temperature control restart signal is detected, the operation mode of the vehicle cabin air conditioning unit 1 is switched back from the operation mode M2 to the seat temperature control priority mode M1, and the temperature control of the seat SE is started by starting the operation of the blower 20 of the seat temperature control unit 2.

[0043] By controlling in this way, when the temperature of the seat SE reaches the temperature control target value (for example, a value considered to be comfortable) as a result of temperature control of the seat SE, the seat temperature control priority mode M1 is terminated and switched to another operation mode M2. Therefore, after the heat storage of the seat SE is eliminated and the seat SE reaches a comfortable temperature, it becomes possible to prioritize the improvement of the comfort of the passenger compartment A, and the comfort of the occupant can be further improved. Furthermore, by stopping the seat temperature control unit 2 when switching to the operation mode M2, the power consumption of the seat temperature control unit 2 can be suppressed, and the energy saving of the vehicle air conditioning system 100 becomes possible.

[0044] Also, when a seat temperature control restart signal for starting the temperature control of the seat SE is detected after the temperature control of the seat SE is stopped, the seat temperature control priority mode M1 is selected again. Therefore, for example, even when there is a possibility that the temperature of the seat SE will rise again on a day with a large amount of solar radiation, the comfort of the occupant when sitting can be improved.

Industrial Applicability

[0045] According to the vehicle air conditioning system of the present invention, it is possible to efficiently perform air conditioning of the passenger compartment and temperature control of the seat during pre-air conditioning of the passenger compartment.

Explanation of Signs

[0046] 1... Passenger compartment air conditioning unit 2... Seat temperature control unit 3... Control device 10... Air outlet for passenger compartment 21... Ventilation duct 21a... Suction side end 21b... Blowing side end 30... Pre-air conditioning execution unit 31... Pre-air conditioning determination unit 32... Inside and outside temperature difference acquisition unit 33... Heating and cooling determination unit 34... Passenger compartment air conditioning operation mode selection unit 35... Seat temperature control operation instruction unit 36... Seat specific information acquisition unit 37... Seat temperature acquisition unit 38... Seat temperature control stop instruction unit 39… Seat temperature control restart signal detection unit 100… Vehicle air conditioning system A… Passenger compartment Ba… Suction port for seat Fa… Seat surface Fb… Back surface SE… Seat SEa… Air outlet for seat

Claims

1. A vehicle air conditioning system including a passenger compartment air conditioning unit that blows conditioned air toward the passenger compartment of a vehicle and includes a plurality of passenger compartment air outlets provided at least at different positions in the height direction of the passenger compartment from each other, and that conditions the air in the passenger compartment; a seat temperature control unit that includes an air passage that sucks air in from a suction side end communicating with a seat suction port in the passenger compartment and blows the air out from a blowout side end communicating with a seat air outlet in the passenger compartment, and that temperature-controls the seat in the passenger compartment; a control device that controls the passenger compartment air conditioning unit and the seat temperature control unit; and comprising: wherein the control device: includes a pre-air conditioning determination unit that determines whether pre-air conditioning for conditioning the passenger compartment by the passenger compartment air conditioning unit has been started before a passenger boards the vehicle; an inside-outside temperature difference acquisition unit that acquires a value of a temperature difference between a target air conditioning temperature in the passenger compartment and an outside air temperature; a passenger compartment air conditioning operation mode selection unit that selects a seat temperature control priority mode in which, when the pre-air conditioning has been started and the value of the temperature difference is equal to or greater than a predetermined value, air is blown out from the passenger compartment air outlet among the plurality of passenger compartment air outlets that is closest to the seat suction port in the height direction; and a seat temperature control operation instruction unit that operates the seat temperature control unit at least when the seat temperature control priority mode is selected. A vehicle air conditioning system.

2. In the seat temperature control unit: the suction side end in the air passage communicates with the seat suction port provided below a seat surface of the seat; the vehicle air conditioning system according to claim 1, wherein the blowout side end in the air passage communicates with the seat air outlet formed on the surface of the seat.

3. In the seat temperature control unit: the blowout side end in the air passage communicates with the seat air outlet provided below a seat surface of the seat; the vehicle air conditioning system according to claim 1, wherein the suction side end in the air passage communicates with the seat suction port formed on the surface of the seat.

4. The control device further includes a seat information acquisition unit that acquires seat identification information for identifying the seat on which a passenger is scheduled to board among the plurality of seats; the vehicle air conditioning system according to claim 1, wherein the seat temperature control operation instruction unit causes the seat air conditioning unit to perform temperature control only on the seat identified by the seat information acquisition unit.

5. The control device further includes a seat temperature acquisition unit that acquires the temperature of the seat. The vehicle air conditioning system according to any one of claims 1 to 4, wherein the vehicle cabin air conditioning operation mode selection unit, after selecting the seat temperature control priority mode, switches to an operation mode other than the seat temperature control priority mode when the temperature of the seat is equal to or lower than a predetermined temperature control target value during cooling by the vehicle cabin air conditioning unit, and when the temperature of the seat is equal to or higher than a predetermined temperature control target value during heating by the vehicle cabin air conditioning unit.

6. The vehicle air conditioning system according to claim 5, wherein the control device further includes a seat temperature control stop instruction unit that stops the operation of the seat temperature control unit when the temperature of the seat is equal to or lower than a predetermined temperature control target value during cooling, and when the temperature of the seat is equal to or higher than a predetermined temperature control target value during heating.

7. The control device further includes a seat temperature control restart signal detection unit that detects a seat temperature control restart signal for starting the temperature control of the seat. The vehicle air conditioning system according to claim 5, wherein the vehicle cabin air conditioning operation mode selection unit reselects the seat temperature control priority mode when the seat temperature control restart signal detection unit detects the seat temperature control restart signal while an operation mode other than the seat temperature control priority mode is selected.

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