JP2016215670A - Vehicle seat cooling/warming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat cooling/warming device capable of cooling/warming a seat and cooling a battery using a blower in an energy-efficient manner.SOLUTION: A vehicle seat cooling/warming device 10 includes: a secondary battery 11 under a rear seat 2; a blower 12; a pipeline 20 for connecting the blower 12, the rear seat 2 and the secondary battery 11 so as to allow air from the blower 12 to circulate; and selector valves 13 and 14. The pipeline 20 includes pipeline sections 21 and 25 passing through the secondary battery 11 and pipeline sections 22, 23, and 24 detouring the secondary battery 11. The pipeline sections 22 and 24 are communicated with the pipeline sections 21 and 25, respectively, and are communicated with the rear seat 2. The selector valve 13 is disposed in a communication section 15 of the pipeline sections 21 and 22 so as to switch the communication state between the blower 12, the secondary battery 11, and the pipeline section 22. The selector valve 14 is disposed in a communication section 16 of the pipeline sections 24 and 25 so as to switch the communication state between the pipeline section 25 on a downstream of the communication section 16, the secondary battery 11, and the pipeline section 24.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle seat cooling / heating device mounted on a vehicle.

  For example, in Patent Document 1, in a hybrid vehicle, a blower for sending wind for cooling a secondary battery and a blower for sending wind for cooling a front seat of the vehicle are shared by one blower. Is described. In the above configuration, the secondary battery is disposed in the center console between the two front seats. A blower type blower is disposed under each front seat. Each blower is connected to the front seat via one communication path and is connected to the battery case of the secondary battery via another communication path. In the blower, a valve mechanism is provided that can control the supply of air to the secondary battery and the supply of air to the front seat. The valve mechanism includes, in the blower, a valve disposed at an air outlet to the secondary battery and a valve disposed at an air outlet to the front seat. By operating the two valves, the supply of air to each of the secondary battery and the front seat is controlled.

JP 2008-44424 A

  The configuration described in Patent Document 1 can cool the front seat, but cannot heat it. Furthermore, the heated air after the secondary battery is cooled is discarded, so that the thermal energy acquired from the secondary battery by the air is discarded.

  The present invention has been made to solve the above-described problems, and provides a vehicle seat cooling / heating device that enables energy efficient cooling and heating of a seat using a blower and cooling of a battery. For the purpose.

  In order to solve the above problems, a vehicle seat cooling / heating device according to the present invention connects a battery, a blower device, a blower device, a seat, and a battery, which are disposed under the vehicle seat, to provide a blower device. A communication passage through which air supplied from the air flows, and a first switching valve and a second switching valve disposed in the communication passage, and the communication passage communicates with the blower device and passes through the battery. A battery bypass passage portion that communicates with the blower device and bypasses the battery. The battery bypass passage portion communicates with the battery passage passage portion upstream and downstream of the battery with respect to the blower device, and communicates with the seat. The switching valve is disposed in the upstream communication portion that is a communication portion between the battery bypass passage portion and the battery passage passage portion upstream of the battery, and switches the communication state between the blower, the battery, and the battery bypass passage portion, The second switching valve bypasses the battery downstream of the battery A portion of the communication path that is disposed downstream of the downstream communication portion with respect to the battery bypass passage portion and the battery passage passage portion, and the battery, disposed in the downstream communication portion that is a communication portion between the road portion and the battery passage passage portion The communication state with the battery bypass passage is switched.

The vehicle seat cooling / heating device further includes a control unit that controls operations of the first switching valve and the second switching valve, and the control unit sends the air blown from the blower to the battery without being sent to the battery bypass passage unit, and the battery. The air after passing through the battery is not sent to the battery bypass passage, and the air from the blower is sent to the battery without being sent to the battery bypass passage, and the air after passing through the battery is sent to the sheet via the battery bypass passage. A state of sending, a state of sending the air from the blower to the sheet via the battery bypass passage without sending the air to the battery, and a state of sending the air from the blower to the battery and sending to the sheet via the battery bypass passage The first switching valve and the second switching valve may be operated so that the state of the communication path selected from the above is established.
The vehicle seat cooling / heating device further includes a battery temperature detection unit that detects a temperature of the battery and a seat temperature detection unit that detects a temperature around the seat, and the control unit detects the battery temperature detection unit and the seat temperature detection unit. Based on the result, the state of the communication path may be selected.

  According to the vehicle seat cooling / heating device of the present invention, the cooling and heating of the seat using the blower and the cooling of the battery can be performed in an energy efficient manner.

1 is a schematic cross-sectional side view showing a vehicle equipped with a vehicle seat cooling / heating device according to an embodiment of the present invention. It is a typical perspective view which shows the vehicle seat cooling / heating apparatus of FIG. 1 arrange | positioned at the rear seat. It is a schematic diagram which shows the structure of the vehicle seat cooling / heating apparatus of FIG. 2 in battery cooling mode. It is a schematic diagram which shows the vehicle seat cooling / heating apparatus of FIG. 2 in a battery cooling sheet heating mode. It is a schematic diagram which shows another form of the vehicle seat cooling / heating apparatus of FIG. 2 in a battery cooling sheet heating mode. It is a schematic diagram which shows the vehicle seat cooling / heating apparatus of FIG. 2 in a seat cooling mode. It is a schematic diagram which shows the vehicle seat cooling / heating apparatus of FIG. 2 in a battery cooling sheet cooling mode.

Hereinafter, a vehicle seat cooling / heating device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the configuration of the vehicle seat cooling / heating device 10 according to the embodiment will be described.
Referring to FIGS. 1 and 2 together, the vehicle seat cooling / heating device 10 is disposed below the rear seat 2 of the hybrid vehicle 1.
The rear seat 2 includes a seat cushion 2a that constitutes a seating surface 2aa, and a seat back 2b that constitutes a backrest. The seat cushion 2a is formed with a plurality of air holes 2c that penetrate the seat cushion 2a in the vertical direction from the back surface 2ab of the seat cushion 2a to the seating surface 2aa. The plurality of vent holes 2c are arranged in the seat cushion 2a so as to be divided into two groups in the left-right direction of the vehicle 1 and form two vent hole groups 2ca and 2cb.
The vehicle seat cooling / heating device 10 is disposed directly below the seat cushion 2 a and is configured to cool and warm the rear seat 2.

  The hybrid vehicle 1 includes an engine and a motor (not shown) as power sources. A battery case 11a including a secondary battery 11 for storing generated power or storing power used by a motor or the like is disposed directly under the seat cushion 2a.

  1 to 3, the vehicle seat cooling / heating device 10 communicates the secondary battery 11, the blower 12, and the blower 12 to the secondary battery 11 and the vent holes 2 ca and 2 cb of the seat cushion 2 a. And two switching valves 13 and 14 disposed in the pipeline 20 and an electronic control unit (hereinafter referred to as ECU) 30. Here, the pipe line 20 constitutes a communication path, and the ECU 30 constitutes a control unit.

  The air blower 12 is disposed directly under the seat cushion 2a. In the present embodiment, the blower 12 is a blower blower, but any blower can be used. The air blower 12 operates to inhale air in the passenger compartment of the vehicle 1 and discharge it from the discharge port 12a. The air blower 12 is configured to receive operation control by the ECU 30.

A first conduit portion 21 of the conduit 20 is connected to the discharge port 12 a of the blower 12. Both end portions of the first conduit portion 21 are connected to the discharge port 12a and the battery case 11a.
In the pipeline 20, the 2nd pipeline part 22 branched from the middle of the 1st pipeline part 21 is extended to the seat cushion 2a. An end portion of the second pipe line portion 22 on the distal side from the first pipe line portion 21 is attached to the seat cushion 2a so as to communicate with the one vent hole group 2ca.
The 1st duct part 21 can connect the air blower 12 to the secondary battery 11 and the 2nd duct part 22 in the battery case 11a. Here, the 1st pipe line part 21 comprises the battery passage passage part.

In the battery case 11a, a fifth pipeline portion 25 of the pipeline 20 extends from a portion opposite to the first pipeline portion 21. The fifth duct portion 25 extends into the luggage room 3 of the vehicle 1 that is outside the vehicle seat cooling / heating device 10.
In the pipeline 20, the 4th pipeline part 24 branched from the middle of the 5th pipeline part 25 is extended to the seat cushion 2a. The end of the fourth pipe section 24 on the distal side from the fifth pipe section 25 is attached to the seat cushion 2a so as to communicate with the other vent hole group 2cb.
The fifth duct section 25 can communicate the secondary battery 11 in the battery case 11 a with the fourth duct section 24 and the luggage room 3. Here, the fifth duct portion 25 constitutes a battery passage passage portion.
Further, in the pipe line 20, a third pipe part 23 branched from the middle of the second pipe part 22 is connected to the fourth pipe part 24 at a position in the middle of the fourth pipe part 24. Here, the 2nd pipeline part 22, the 3rd pipeline part 23, and the 4th pipeline part 24 comprise the battery detour passage part.

The first switching valve 13 is disposed in the upstream communication portion 15 which is a connection portion between the first pipeline portion 21 and the second pipeline portion 22. That is, the first switching valve 13 is disposed in the upstream communication portion 15 on the upstream side of the secondary battery 11 with respect to the blower 12.
The first switching valve 13 is configured to operate by an actuator (not shown) and to be controlled by the ECU 30. The first switching valve 13 includes a state in which the air blower 12 is communicated only with the secondary battery 11, a state in which the air blower 12 is communicated only with the second duct portion 22, and the air blower 12 in the secondary battery 11 and second The state of the pipe line 20 can be switched by selecting any one of three states including a state communicating with both of the pipe line parts 22.

The second switching valve 14 is disposed in the downstream communication portion 16 that is a connection portion between the fourth pipeline portion 24 and the fifth pipeline portion 25. That is, the second switching valve 14 is disposed in the downstream communication portion 16 on the downstream side of the secondary battery 11 with respect to the blower device 12.
The second switching valve 14 is configured to operate by an actuator (not shown) and to be controlled by the ECU 30. The second switching valve 14 includes a state in which the secondary battery 11 communicates only with the luggage room 3, a state in which the secondary battery 11 communicates only with the fourth conduit 24, and the secondary battery 11 in the luggage room 3 and the second The state of the pipe line 20 can be switched by selecting any one of three states including a state communicating with both of the four pipe line parts 24.

The vehicle seat cooling / heating device 10 further includes a battery temperature sensor 17 provided in the battery case 11a. The battery temperature sensor 17 is configured to detect the temperature of the secondary battery 11 in the battery case 11 a and send the detection result to the ECU 30. Here, the battery temperature sensor 17 constitutes a battery temperature detection unit.
Furthermore, the vehicle seat cooling / heating device 10 includes a seat temperature sensor 18 provided on the seat surface 2aa of the seat cushion 2a. The seat temperature sensor 18 is configured to detect the temperature in the vicinity of the seating surface 2aa and send the detection result to the ECU 30. Here, the seat temperature sensor 18 constitutes a seat temperature detector.

Next, the operation of the vehicle seat cooling / heating device 10 according to the embodiment of the present invention will be described.
FIG. 3 shows the vehicle seat cooling / heating device 10 in the battery cooling mode.
Referring to FIGS. 1 and 3 together, the ECU 30 determines from the temperature detected by the seat temperature sensor 18 that the seat cushion 2a of the rear seat 2 does not need to be cooled or heated, and from the temperature detected by the battery temperature sensor 17. It is determined that the secondary battery 11 needs to be cooled.
At this time, the ECU 30 operates the first switching valve 13 so that the air blower 12 is in communication with the secondary battery 11 without being in communication with the second conduit 22, and the secondary battery 11 is The 2nd switching valve 14 is operated so that it may be set as the state connected to the luggage room 3 without connecting with the four pipe line part 24. FIG. Thereafter, the ECU 30 operates the blower 12.
Thereby, the air blower 12 inhales the air in a vehicle interior, discharges it to the 1st duct part 21, and all the discharged air is sent to the secondary battery 11 in the battery case 11a. The air is discharged into the luggage room 3 through the fifth pipe section 25 after cooling the secondary battery 11.

  3 to 7, the flow of cool air discharged from the blower 12 is indicated by a double arrow, and the flow of heated air after cooling the secondary battery 11 is indicated by a single arrow. Has been.

4 and 5 show the vehicle seat cooling / heating device 10 in the battery cooling seat heating mode.
1 and 4 together, the ECU 30 determines that the seat cushion 2a needs to be heated from the temperature detected by the seat temperature sensor 18, and cools the secondary battery 11 from the temperature detected by the battery temperature sensor 17. Is determined to be necessary.

At this time, the ECU 30 operates the first switching valve 13 so that the blower device 12 is in communication with the secondary battery 11 without communicating with the second pipe section 22, and the secondary battery 11 is loaded into the luggage. The 2nd switching valve 14 is operated so that it may be in the state connected to the 4th pipe line part 24, without making it communicate with the room 3. FIG. Thereafter, the ECU 30 operates the blower 12.
Thereby, all of the air discharged from the blower 12 to the first duct portion 21 is sent to the secondary battery 11 in the battery case 11a. The heated air after cooling the secondary battery 11 sequentially passes through the fifth duct section 25 and the fourth duct section 24, and a part of the air in the fourth duct section 24 enters the vent hole group 2cb. The air flows in as it is, and other air sequentially passes through the third pipe line part 23 and the second pipe line part 22 and flows into the vent hole group 2ca. Therefore, on the seat surface 2aa of the seat cushion 2a, the heated air, that is, warm air, is released from the vent groups 2ca and 2cb.

Alternatively, as shown in FIG. 5, the ECU 30 operates the first switching valve 13 so that the blower device 12 is in communication with the secondary battery 11 without being in communication with the second conduit 22. The second switching valve 14 is operated so that the secondary battery 11 is in communication with both the luggage room 3 and the fourth pipeline section 24.
All of the air discharged from the activated air blower 12 to the first duct portion 21 is sent to the secondary battery 11 in the battery case 11a. A part of the heated air after cooling the secondary battery 11 sequentially passes through the fifth duct section 25 and the fourth duct section 24 and is discharged as warm air from the vent groups 2ca and 2cb in the same manner as described above. The The other part of the heated air is discharged into the luggage room 3 through the fifth pipe part 25. The flow rate of the warm air discharged from the vent holes 2ca and 2cb is smaller than that in the case of the vehicle seat cooling / heating device 10 shown in FIG. For this reason, the heating to the seat cushion 2a is weaker than in the case of the vehicle seat cooling / heating device 10 shown in FIG. Furthermore, by changing the state of the second switching valve 14, the flow rate of the heated air sent to the seat cushion 2a can be changed.

FIG. 6 shows the vehicle seat cooling / heating device 10 in the seat cooling mode.
1 and 6 together, the ECU 30 determines that the seat cushion 2a needs to be cooled from the temperature detected by the seat temperature sensor 18, and the secondary battery 11 is cooled from the temperature detected by the battery temperature sensor 17. It is determined that it is unnecessary.
At this time, the ECU 30 operates the first switching valve 13 so that the blower device 12 is not in communication with the secondary battery 11 but is in communication with the second conduit 22, and the secondary battery 11 is The 2nd switching valve 14 is operated so that it may be set as the state connected to the luggage room 3 without connecting with the four pipe line part 24. FIG. Thereafter, the ECU 30 operates the blower 12.
As a result, all of the air discharged by the blower 12 to the first pipeline portion 21 is sent to the second pipeline portion 22. A part of the air in the second pipe part 22 flows into the vent hole group 2ca as it is, and the other air sequentially passes through the third pipe part 23 and the fourth pipe part 24 to the vent hole group 2cb. Inflow. Therefore, cold air is discharged from the vent groups 2ca and 2cb on the seating surface 2aa of the seat cushion 2a.

FIG. 7 shows the vehicle seat cooling / heating device 10 in the battery cooling seat cooling mode.
1 and 7 together, the ECU 30 determines that the seat cushion 2a needs to be cooled from the temperature detected by the seat temperature sensor 18, and the secondary battery 11 is cooled from the temperature detected by the battery temperature sensor 17. Determine that it is necessary.
At this time, the ECU 30 operates the first switching valve 13 so that the blower device 12 is in communication with both the secondary battery 11 and the second conduit 22, and the secondary battery 11 is connected to the fourth pipe. The 2nd switching valve 14 is operated so that it may be in the state connected to the luggage room 3 without connecting with the road part 24. FIG. Thereafter, the ECU 30 operates the blower 12.
As a result, a part of the air discharged from the blower 12 to the first pipeline portion 21 is sent to the secondary battery 11, and the other portion of the air is sent to the second pipeline portion 22. All of the air after cooling the secondary battery 11 is discharged into the luggage room 3 through the fifth pipe section 25. The air in the second duct portion 22 passes through any one of the second duct portion 22, the third duct portion 23, and the fourth duct portion 24 and flows into the vent hole group 2ca and the vent hole group 2cb. Therefore, cold air is discharged from the vent groups 2ca and 2cb on the seating surface 2aa of the seat cushion 2a. Furthermore, the ratio of the cool air sent to the secondary battery 11 and the seat cushion 2a can also be changed by changing the state of the first switching valve 13.

  As described above, the vehicle seat cooling / heating device 10 according to the embodiment of the present invention includes the secondary battery 11, the air blower 12, the air blower 12, and the rear seat disposed below the rear seat 2 of the vehicle 1. 2 and a secondary battery 11 are connected to each other, and a pipeline 20 through which air supplied from the blower 12 flows, and a first switching valve 13 and a second switching valve 14 disposed in the pipeline 20 are provided. The pipe line 20 communicates with the blower device 12 and passes through the secondary battery 11, and the second pipe part 21 and the fifth pipe line part 25 communicate with the blower device 12 and bypasses the secondary battery 11. A path portion 22, a third pipeline portion 23 and a fourth pipeline portion 24 are included. The pipe sections 22, 23, 24 communicate with the pipe sections 21, 25 at the upstream and downstream of the secondary battery 11 with respect to the blower 12 and also communicate with the rear seat 2. The first switching valve 13 is disposed in the upstream communication portion 15 that is a communication portion between the second pipeline portion 22 and the first pipeline portion 21 upstream of the secondary battery 11, and the air blower 12 and the secondary battery 11. And the communication state between the second pipe section 22 and the second pipe section 22 are switched. The second switching valve 14 is disposed in the downstream communication portion 16 that is a communication portion between the fourth pipeline portion 24 and the fifth pipeline portion 25 on the downstream side of the secondary battery 11, and is downstream of the downstream communication portion 16. The communication state is switched between the part of the fifth pipe line part 25 located in the position, the secondary battery 11 and the fourth pipe line part 24.

  In the above-described configuration, the first switching valve 13 allows the air blown from the blower 12 to be sent to the secondary battery 11, the second pipeline portion 22, or both. Further, the air that has been heated after passing through the secondary battery 11 by the second switching valve 14 is sent to the fourth pipe part 24, the part of the fifth pipe part 25 downstream of the downstream communication part 16, or It can be sent to both. Alternatively, the second switching valve 14 can prevent the air in the fourth pipe section 24 from being sent to the fifth pipe section 25.

Therefore, the cool air from the blower 12 can be sent only to the secondary battery 11, only to the rear seat 2, or to both the secondary battery 11 and the rear seat 2. Further, the heated blast after passing through the secondary battery 11 is transferred from the fifth duct section 25 to the luggage room 3, to the rear seat 2 via the fifth duct section 25 and the fourth duct section 24, or It can be sent to both the luggage room 3 and the rear seat 2.
Therefore, the vehicle seat cooling / heating device 10 enables the secondary battery 11 and the rear seat 2 to be cooled, and further enables the rear seat 2 to be heated using the air blown after the secondary battery 11 is cooled. Thereby, the heat energy of the ventilation after cooling the secondary battery 11 is utilized efficiently.

The vehicle seat cooling / heating device 10 includes an ECU 30 that controls operations of the first switching valve 13 and the second switching valve 14. The ECU 30 sends the air from the blower 12 to the secondary battery 11 without sending it to the second conduit 22 and does not send the air after passing through the secondary battery 11 to the fourth conduit 24; A state in which the air sent from the device 12 is sent to the secondary battery 11 without being sent to the second pipe part 22 and the air after passing through the secondary battery 11 is sent to the rear seat 2 via the pipe parts 22, 23, 24. The air sent from the blower 12 is not sent to the secondary battery 11 but sent to the rear seat 2 via the pipe sections 22, 23, and 24, and the air sent from the blower 12 is sent to the secondary battery 11 and the duct The 1st switching valve 13 and the 2nd switching valve 14 are operated so that it may be in the state of the pipe line 20 selected from the state sent to the rear seat 2 via the part 22,23,24.
In the above-described configuration, the ECU 30 can automatically change the state of the pipeline 20 to the selected desired state.

  Further, the vehicle seat cooling / heating device 10 includes a battery temperature sensor 17 that detects the temperature of the secondary battery 11 and a seat temperature sensor 18 that detects the temperature around the rear seat 2. The ECU 30 selects the state of the pipe line 20 based on the detection results of the battery temperature sensor 17 and the seat temperature sensor 18. In the above-described configuration, the ECU 30 selects the cooling of the secondary battery 11 and the cooling and heating of the rear seat 2 in accordance with the temperatures of the secondary battery 11 and the rear seat 2, and changes the state of the pipe line 20 to a desired state. It can be changed automatically.

In the vehicle seat cooling / heating device 10 according to the embodiment, the blower device 12 is disposed directly below the rear seat 2, but may be disposed at any location in the vehicle 1.
Although the vehicle seat cooling / heating device 10 according to the embodiment is disposed below the rear seat 2 of the vehicle 1, it may be disposed below the front seat. In a vehicle including three or more rows of seats, the vehicle seat cooling / heating device 10 may be disposed on any row of seats. Furthermore, the vehicle seat cooling / heating device 10 may be mounted on any vehicle having a battery other than an automobile.
Although the vehicle seat cooling / heating apparatus 10 according to the embodiment includes the secondary battery 11 as a battery, the type of the battery is not limited to the secondary battery. The battery only needs to generate heat, and may be a fuel cell.

  DESCRIPTION OF SYMBOLS 1 Vehicle, 2 Rear seats, 10 Vehicle seat cooling / heating device, 11 Secondary battery, 12 Blower, 13 First switching valve, 14 Second switching valve, 15 Upstream communication unit, 16 Downstream communication unit, 17 Battery temperature sensor ( Battery temperature detection unit), 18 sheet temperature sensor (sheet temperature detection unit), 20 pipe line (communication path), 21 first pipe line part (battery passage path part), 22 second pipe line part (battery bypass path part) , 23 3rd pipeline part (battery bypass passage part), 24 4th pipeline part (battery bypass passage part), 25 5th pipeline part (battery passage passage part), 30 ECU (control part).

Claims (3)

A vehicle seat cooling / heating device,
A battery disposed under the seat of the vehicle;
A blower;
Connecting the blower, the seat, and the battery, and a communication path through which air supplied from the blower circulates;
A first switching valve and a second switching valve disposed in the communication path,
The communication passage includes a battery passage passage portion that communicates with the blower and passes through the battery, and a battery bypass passage portion that communicates with the blower and bypasses the battery,
The battery bypass passage portion communicates with the battery passage passage portion upstream and downstream of the battery with respect to the blower device, and communicates with the sheet.
The first switching valve is
It is disposed in an upstream communication portion that is a communication portion between the battery bypass passage portion and the battery passage passage portion upstream of the battery,
Switching the communication state between the blower, the battery, and the battery bypass passage,
The second switching valve is
It is arranged in a downstream communication part that is a communication part between the battery bypass passage part and the battery passage part in the downstream of the battery,
A vehicle seat that switches a communication state between the battery bypass passage portion and the battery bypass passage portion and the battery bypass passage portion and the portion of the communication passage located downstream of the downstream communication portion. Cooling and heating device. A control unit for controlling operations of the first switching valve and the second switching valve;
The controller is
A state in which the air blown from the blower is sent to the battery without being sent to the battery bypass passage part, and the air after passing through the battery is not sent to the battery bypass passage part;
Sending air from the blower to the battery without sending it to the battery bypass passage, and sending the air after passing through the battery to the sheet via the battery bypass passage;
A state in which air from the blower is sent to the sheet via the battery bypass passage without sending the air to the battery;
The first switching valve and the second switching are set so as to be in a state of the communication path selected from a state in which the air blown from the blower is sent to the battery and sent to the seat through the battery bypass passage portion. The vehicle seat cooling / heating device according to claim 1, wherein the valve is operated. A battery temperature detector for detecting the temperature of the battery; and a sheet temperature detector for detecting a temperature around the seat;
The vehicle seat cooling / heating device according to claim 2, wherein the control unit selects a state of the communication path based on detection results of the battery temperature detection unit and the seat temperature detection unit.

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