KR20210036425A - Heating and Cooling Supply System for Vehicle Sheets - Google Patents

Abstract

A cooling and heating supply system for a vehicle seat, capable of executing temperature deviation control automatically applying heat to a reaction surface of a thermoelement if an outside temperature and the temperature of the reaction surface of the thermoelement depart from a preset temperature range in a heating mode, comprises: an air supply part (120) providing a preset air supply route into a vehicle seat (110); a thermoelectric module part (130) combined with an injection port (122) of the air supply part (120), and forcibly suctioning air from the outside and heating or cooling the air in accordance with an operation by a user to supply the air to the air supply part (120); an electric heating body (140) automatically applying heat to a reaction side if temperatures of an action side and the reaction side depart from a preset temperature range; a temperature sensing part (150) including at least one temperature sensing sensor (151,153,155); an operation part (160) installed in the vehicle to enable the user to regulate the intensity of each of the heating and cooling modes; and a control part (170) heating or cooling the air having passed through the thermoelectric module part (130) by controlling a direction of a DC current applied to the thermoelectric module part (130) in accordance with an operation of the operation part (160), and executing temperature deviation control by heating the electric heating body (140) installed on the reaction side of the thermoelectric module part (130) if an outside temperature and the temperature of the reaction side of the thermoelectric module part (130) depart from a preset temperature range in the heating mode.

Description

Heating and Cooling Supply System for Vehicle Sheets

The present invention relates to a cooling/heating supply system for vehicle seats, and more particularly, to a cooling/heating supply system for vehicle seats capable of implementing high-efficiency heating performance in a short time even at poor sub-zero temperatures.

In general, a vehicle nowadays is provided with an air conditioner including an air conditioner and a heater to control the indoor temperature, but an air conditioner including an air conditioner and a heater cannot control the temperature of a vehicle seat.

Accordingly, even if an air conditioner or heater is operated while the occupant is seated on the seat during the summer or winter season, the seat is relatively slower than the indoors or remains cold for a long time. For this reason, the occupant seated on the seat may sweat, feel cold or cold on the buttocks and back.

Accordingly, in recent years, in order to improve the driving comfort, there is an increasing tendency to install a cooling/heating device on the seat of a vehicle.In the initial heating method, heating by applying electricity while a heating wire or a planar heating element is attached to the seat of the vehicle. However, due to the problem that it is difficult to find the cause of the failure in the event of electromagnetic wave generation and failure, recently, thermoelectric elements are mounted around a high-spec vehicle seat to control the temperature of the vehicle seat.

Such a thermoelectric element is an element used for cooling and heating supply. In general, a plurality of pairs of p-type thermoelectric semiconductors and n-type thermoelectric semiconductors are connected in series. When a DC voltage is applied to the thermoelectric element, one side of the thermoelectric element is Endothermic occurs, resulting in low temperature, and the other side generates heat, resulting in high temperature. In addition, airflow is generated on each of the low-temperature and high-temperature surfaces of the thermoelectric element using heat-radiating fins, blowers, fans, pumps, etc., to obtain a cooling effect from the airflow passing through the heat-transfer fin medium on the low-temperature surface of the thermal element. It is a structure that obtains a heating effect from the airflow passing through the cotton heat transfer fin medium.

For example, Korean Laid-Open Patent Publication No. 10-2008-0018459 (February 28, 2008) describes a temperature control system for controlling the temperature of the car seat by supplying temperature-controlled air to the car seat.

In addition, Korean Laid-Open Patent Publication No. 10-2010-0000550 (January 6, 2010) states that only the blowing fan is driven, that is, the thermoelectric element is not driven, and the blowing fan is always driven but the thermoelectric element is intermittently driven. A temperature control device of a seat air conditioner of a vehicle, and a method thereof, capable of reducing power consumption compared to the temperature control method of a seat air conditioner in which a blower fan and a thermoelectric element are always driven by including a mode are disclosed.

In addition, Republic of Korea Patent Publication No. 10-1524089 (May 22, 2015) provides cooling and heating wind to the seat of the vehicle, and effectively generates cooling and heating air by using a thermoelectric element, A cooling/heating unit of a vehicle seat is disclosed that enables effective removal of generated condensate.

In addition, Korean Laid-Open Patent Publication No. 10-2015-0010441 (January 28, 2015) additionally configures a pipe for improving air flow to the thermoelectric device module mounted on the sheet on the outer circumferential surface of the body of the thermoelectric device module, A sheet capable of removing condensation from the heat dissipation fins because water droplets generated on the heat dissipation fins acting as a cooling part among the heat dissipation fins formed on both sides of the thermoelectric element during sheet heating are discharged from the pipe by the air delivered to the outlet. A thermoelectric device module of a heating/cooling system is described.

However, the air conditioner system using such a conventional thermoelectric element does not have a relatively big problem during cooling, but there is a fatal problem that condensation in the cooling fin occurs during heating, so it is solved by blowing condensation into the indoor air or absorbing it by the heat sink. In some cases, eupjae is used or a separate pipe is additionally configured on the outer circumference of the body of the thermoelectric device module, but the overall configuration of the device is increased, and the heating time and heating efficiency of the vehicle are significantly lowered in areas with severe cold.

Republic of Korea Patent Publication No. 10-2008-0018459 (February 28, 2008) Republic of Korea Patent Publication No. 10-2010-0000550 (January 6, 2010) Republic of Korea Patent Publication No. 10-1524089 (May 22, 2015) Republic of Korea Patent Publication No. 10-2015-0010441 (January 28, 2015)

The present invention was conceived to solve the disadvantages of the prior art described above, and an object of the present invention is the reaction surface of the thermoelectric element when the temperature of the reaction surface of the thermoelectric element and the external temperature in the heating mode are out of the preset temperature range. It is to provide a cooling/heating supply system for a vehicle seat capable of performing temperature deviation control that automatically applies heat to a vehicle.

A vehicle seat cooling and heating supply system according to the present invention for achieving such an object includes a vehicle seat 110 installed inside a vehicle for a user to be seated; An air supply unit 120 formed integrally or separately installed inside the vehicle seat 110 to provide a preset air supply path in the vehicle seat 110; A thermoelectric module unit 130 coupled to the inlet 122 of the air supply unit 120 and forcibly inhaling air from the outside according to a user's manipulation, heating or cooling, and supplying it to the air supply unit 120; An electric heating element 140 that is installed on the reaction side of the thermoelectric module unit 130 and automatically applies heat to the reaction side when temperatures of the reaction side and the reaction side are outside a preset temperature range; A temperature sensing unit provided on the vehicle seat 110 and/or the thermoelectric module unit 130 and including at least one temperature sensing sensor 151, 153, 155 for measuring the temperature of air supplied to the air supply unit 120 (150) and; An operation unit 160 installed inside the vehicle and configured to adjust the intensity of the heating mode or the cooling mode and each mode by the user; By controlling the direction of the direct current applied to the thermoelectric module unit 130 according to the operation of the operation unit 160, the air passing through the thermoelectric module unit 130 is heated or cooled, and in the heating mode, the external temperature and the When the temperature on the reaction side of the thermoelectric module unit 130 is out of a preset temperature range, a control unit that heats the electric heating element 140 installed on the reaction side of the thermoelectric module unit 130 to perform temperature deviation control ( 170).

According to the cooling/heating supply system of the vehicle seat according to the present invention as described above, when the temperature of the reaction surface of the thermoelectric element and the external temperature in the heating mode are out of a preset temperature range, heat is automatically applied to the reaction surface of the thermoelectric element. Temperature deviation control can be executed, providing the effect of realizing high-efficiency heating performance in a short time even at poor sub-zero temperatures.

In addition, electromagnetic waves are not exposed when operating in the cooling/heating mode, vibration and noise can be reduced, and since the electronic cooling or heating method is used, the temperature response (immediate cooling or heating) is good. It has a relatively better effect than the product.

In addition, since components such as a motor and heater coil, which are fatigue-damaged mechanical parts, are not used, it can have the longest life reliability as a cooling means, which can further improve product competitiveness.

1 is a perspective view of a cooling/heating supply system for a vehicle seat according to a preferred embodiment of the present invention;
2 is an exploded perspective view of a thermoelectric module part of a cooling/heating supply system of a vehicle seat according to a preferred embodiment of the present invention;
3 is a block diagram illustrating a circuit connection relationship of a cooling/heating supply system of a vehicle seat according to a preferred embodiment of the present invention;
4 is a block diagram of a control unit of a cooling/heating supply system for a vehicle seat according to a preferred embodiment of the present invention;
5 is a perspective view of a thermoelectric element of a cooling/heating supply system for a vehicle seat according to a preferred embodiment of the present invention.

Hereinafter, a configuration and operation of a cooling/heating supply system for a vehicle seat according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view of a cooling/heating supply system for a vehicle seat according to a preferred embodiment of the present invention; 2 is an exploded perspective view of a thermoelectric module part of a cooling/heating supply system for a vehicle seat according to a preferred embodiment of the present invention.

1 and 2, the cooling and heating supply system of a vehicle seat according to a preferred embodiment of the present invention includes a vehicle seat 110 installed inside a vehicle for a user to sit, an air supply unit 120, and a thermoelectric module. It consists of a unit 130, an electric heating body 140, a temperature sensing unit 150, an operation unit 160, and a control unit 170.

Here, it is preferable that the air supply unit 120 is integrally formed or separately installed inside the vehicle seat 110 to provide a preset air supply path in the vehicle seat 110.

In addition, the thermoelectric module unit 130 is coupled to the inlet 122 of the air supply unit 120 by a user or an operator, and by forcibly inhaling air from the outside according to the user's operation and heating or cooling the air supply unit 120 ).

Here, the thermoelectric module unit 130, as shown in FIG. 2, forms an installation space therein while the upper case 131a and the lower case 131b are vertically coupled to each other, and external air is supplied to one end thereof. An air intake port (131-1) for inhalation is formed, and an injection port of the air supply unit 120 to supply air passing through the working side of the thermoelectric module unit 130 to the air supply unit 120 on the upper side of the other side. A first air outlet (131-2) coupled to 122 is formed, and a second air outlet (131-3) is provided at the other end to discharge air passing through the reaction side of the thermoelectric module unit 130. It is mounted in a case 131 to be formed and an installation space formed inside the case 131, and the action surface S3 is arranged to be located at the upper side and the reaction surface S1 at the lower side. A thermoelectric element 133 in which the working surface S3 performs a heat generating or absorbing operation according to control, an upper heat dissipating plate 135a surrounding the working surface S3 of the thermoelectric element 133, and the thermoelectric element 133 Consisting of a lower heat dissipation plate (135b) surrounding the reaction surface (S1) of, the heat dissipation element 135 for discharging heat generated from the thermoelectric element 133 to the outside, and an installation space formed inside the case 131 A first blower (137a) mounted on the front side of the upper heat sink (135a) or the lower heat sink (135b), forcibly generating wind under the control of the control unit 170 and supplying it to the upper heat sink (135a), and It is preferable that it is composed of a blower 137 having a second blower 137b supplied to the lower heat sink 135b.

Here, the thermoelectric element 133 is also expressed as a Peltier element, a thermoelectric conversion element, a semi-equal element, a Peltier element, a temperature module, and a TEC, and is a semiconductor element that allows cooling, heating, and temperature control freely by direct current. (1) Temperature difference occurs on both sides of the device by passing a direct current to the device, (2) heat absorption occurs on the low-temperature side and heat is generated on the high-temperature side, pushing heat from the low-temperature side to the high-temperature side of the thermoelectric device. That is, it acts as a heat pump, and (3) changing the direction of the heat pumped by simply changing the polarity of the current and also changing the size of the current, it is possible to change the amount of heat to be pumped.

In addition, a motor for driving each of the first or lower blowing fans 137a and 137b may be separately provided in the blowing unit 137, or may be implemented in a module type in each of the blowing fans.

In addition, the electric heating element 140 is inserted between the lower heat sink 135b of the reaction side of the thermoelectric module unit 130 or installed to be in surface contact, so that the reaction side when the temperature of the acting side and the reaction side is outside the preset temperature range It is desirable to operate to automatically apply heat to the side.

Here, the electric heating element 140 may be selected from an electric resistance heating wire, a PCT heating element, a coil heater, an input heater, a cartridge heater, a casting heater, a seed heater, a halogen heater, an infrared heater, a fin heater, a ceramic band heater, a flange heater, etc. It can be used, and all heating elements using electricity are applicable.

In addition, the temperature sensing unit 150 is installed on the vehicle seat 110 and/or the thermoelectric module unit 130 to periodically measure the indoor temperature of the vehicle and the temperature of the air supplied to the air supply unit 120. It is preferable to include at least one temperature sensor (151, 153, 155) each transmitted to the control unit 170.

In addition, the operation unit 160 is installed inside the vehicle, and the user can adjust the heating mode or the cooling mode and the intensity of each mode. Among the rotary switches, button switches, or sliding switches that are actually installed inside the vehicle It is desirable to be selected and mounted.

In addition, the control unit 170 heats or cools the air passing through the thermoelectric module unit 130 by controlling the direction of the direct current applied to the thermoelectric module unit 130 according to the operation of the operation unit 160, and the heating mode When the temperature outside the city and the temperature on the reaction side of the thermoelectric module unit 130 are out of a preset temperature range, the electric heating element 140 installed on the reaction side of the thermoelectric module unit 130 is heated to control temperature deviation. It is desirable to do it.

On the other hand, the control unit 170, as shown in Figure 4, the A/D converter 171 for converting the temperature value sensed in the form of an analog signal by the first to third temperature sensors 151, 153, 155 into a digital signal. ), a forward/reverse conversion circuit 172 for converting the direction of the DC current applied to the thermoelectric element 133, and the first to third temperature sensors 151, 153, 155 according to the temperature value set by the operation unit 160 A microprocessor that controls the direction of the output current of the forward/reverse conversion circuit 172 according to the detected temperature value, or controls the direction of the output current of the forward/reverse conversion circuit 172 to heat the electric heating element 140 It consists of 173.

Here, the microprocessor 173 of the control unit 170, when the outside air temperature of the vehicle seat 110 is an image, the vehicle seat so that the temperature of the reaction surface (S1) of the thermoelectric element 133 smoothly absorbs heat. It is controlled to be relatively 2~3℃ lower than the outside temperature of (110), and when the outside temperature is below zero, the outside temperature is ignored and condensation or condensation of water vapor on the working surface (S3) of the thermoelectric element 113 It is desirable to control the temperature deviation so that this does not occur.

In addition, the power supply unit (not shown) may use a battery provided in the vehicle or use a separate power supply device.

Hereinafter, with reference to the accompanying drawings will be described the operation of the vehicle seat cooling and heating supply system according to an embodiment of the present invention.

(1) Initial state setting

In order for the user to use the cooling/heating supply system of the vehicle seat according to the present invention, the thermoelectric element 133, the air blower 137, and the temperature detection unit 150 are operated under the control of the controller 170 in the battery installed in the vehicle. It is determined whether it is in a normal state, and if it is determined as a normal state, the normal state is indicated by using a status indicator mounted on the dashboard of the vehicle.

(2) Operation mode setting

When the current state is determined to be a normal state, the user can manipulate the operation unit 160 mounted on the dashboard of the vehicle to select a heating mode or a cooling mode to apply an operation command, and the intensity of each heating mode or cooling mode It can also be adjusted.

At this time, the microprocessor 173 of the control unit 170 determines whether the current mode is a heating mode or a cooling mode according to an operation command applied by the user.

(3) Heating mode

At this time, if it is determined as the heating mode as a result of the determination, the microprocessor 173 of the control unit 170 first drives the upper blowing fan 137a of the air blower 137 to form an air intake port formed at one end of the case 131 ( 131-1) by forcibly inhaling air to generate wind, passing through the upper heat sink 135a mounted on the working surface (S3) of the thermoelectric element 133 of the thermoelectric module unit 130 in the transverse direction, and the case 131 ) To be discharged through the second air outlet (131-3) formed on the upper side of the other end of the thermoelectric element (133) by controlling the forward and reverse switching circuit (172) to control the direction of the current entering the thermoelectric element (133). A direct current in a preset direction (+ or-direction) is applied to the thermoelectric element 133 so that the working surface S3 faces upward. In this case, the controller 170 may adjust the intensity of the preset heating mode by adjusting the intensity of voltage and current applied to the thermoelectric element 133.

Accordingly, the reaction surface (S1) of the thermoelectric element 133 of the thermoelectric module unit 130 emits heat and at the same time, the action surface (S3) of the thermoelectric element 133 absorbs heat, so the action of the thermoelectric element 133 Wind passing through the upper heat dissipation plate 135a of the heat dissipation element 135 installed on the surface S3 in the transverse direction can be heated, so that the second air outlet 131-3 formed on the upper side of the other end of the case 131 The heated air can be discharged through.

At this time, when the inlet 122 of the air supply unit 120 and the second air outlet 131-3 formed on the upper side of the other end of the case 131 are coupled to be connected to each other by a user or an operator, the warm air is the vehicle seat ( 110) can be supplied to the interior of the vehicle seat 110 along the air supply pipe 120 installed inside the vehicle seat 110, or is connected to be fed back to the input terminal of the air blower 137 It is also possible.

On the other hand, the microprocessor 173 of the control unit 170, when the current mode is the heating mode, the temperature detection value of the second temperature sensing sensor 153 installed on the upper heat sink 135 of the heat dissipation element 135 and the vehicle seat ( 110) When the temperature sensing values of the third temperature sensing sensors 155 installed in the surroundings are periodically received and the difference between the two temperature values does not exceed a preset temperature range, the lower heat sink 135b of the heat dissipating element 135 The heat absorbing function of the heat absorbing function is determined to be a normal state and the electric heating element 140 is not operated, but when the difference between the two temperature values exceeds a preset temperature range, the heat dissipation element 135 It is determined that the heat absorption function of the lower heat sink 135b of) is not normal, and the electric heating element 140 is controlled to be operated.

That is, when the outside air temperature is an image, the control unit 170 adjusts the temperature of the lower heat sink 135b of the heat dissipation element 135 on the working surface S3 of the thermoelectric element 133 to smoothly absorb heat. The lower heat sink 135b of the heat dissipation element 135 of the working surface S3 of the thermoelectric element 133 is controlled to be relatively lower than the ambient outdoor temperature by about 2~3℃, and when the outside temperature is below zero, the outside temperature is ignored. ), it is desirable to operate to control the temperature so that condensation or condensation of water vapor does not occur.

(3) Cooling mode

On the other hand, if the current mode is determined to be the cooling mode, the microprocessor 173 of the control unit 170 first drives the upper blowing fan 137a of the air blower 137 to form an air intake port formed at one end of the case 131 ( 131-1) by forcibly inhaling air to generate wind, passing through the upper heat sink 135a mounted on the working surface (S3) of the thermoelectric element 133 of the thermoelectric module unit 130 in the transverse direction, and the case 131 ) To be discharged through the second air outlet (131-3) formed on the upper side of the other end of the thermoelectric element (133) by controlling the forward and reverse switching circuit (172) to control the direction of the current entering the thermoelectric element (133). A direct current in a preset direction (+ or-direction) is applied to the thermoelectric element 133 so that the reaction surface S1 faces upward. In this case, the controller 170 may adjust the intensity of the preset heating mode by adjusting the intensity of voltage and current applied to the thermoelectric element 133.

Accordingly, since the working surface S3 of the thermoelectric element 133 of the thermoelectric module unit 130 absorbs heat and the reaction surface S3 of the thermoelectric element 133 dissipates heat, the reaction of the thermoelectric element 133 The wind passing through the upper heat sink 135a of the heat dissipation element 135 installed on the surface S3 in the transverse direction can be cooled, so that the second air outlet 131-3 formed on the upper side of the other end of the case 131 The heated cold air may be discharged through the.

At this time, when the inlet 122 of the air supply unit 120 and the second air outlet 131-3 formed on the upper side of the other side end of the case 131 are coupled to be connected to each other by a user or an operator, the cold air is applied to the vehicle seat ( It may be supplied to the interior of the vehicle seat 110 along the air supply pipe 120 installed in the interior of 110).

Table 1 below shows a fan in a heating mode, a thermoelectric module, an electric heater, and a hot side of the thermoelectric element using the cooling/heating supply system of the vehicle seat according to the present invention. ) And the reaction surface (Cold side), each voltage and current. In case the temperature difference between the hot side and the cold side of the thermoelectric element is severe, the heating temperature is raised by operating the electric heating element. It shows what can be done.

In addition, as shown in Tables 2 and 3 below, as a result of controlling the heating mode by using the cooling/heating supply system of the vehicle seat according to the present invention, the hot side of the thermoelectric element and the electric heater It can be seen that the temperature difference of side) can be maintained at about 4℃ higher than room temperature.

The embodiments of the present invention disclosed in the specification and drawings described above are merely specific examples to aid understanding, and are not intended to limit the scope of the present invention. In addition to the embodiments disclosed herein, it is apparent to those of ordinary skill in the art that other modifications based on the technical idea of the present invention may be implemented.

110: vehicle seat 120: air supply pipe
130: thermoelectric module part 131: case
131a: upper case 131b: lower case
133: thermoelectric element 135: heat sink
135a: upper heat sink 135b: lower heat sink
137: blower 137a: upper blower
137b: lower fan 140: electric heating element
150: temperature detection unit 151 to 155: temperature detection sensor
160: control unit 170: control unit
171: A/D converter 172: forward and reverse conversion circuit
173: microprocessor

Claims (4)

A vehicle seat 110 installed inside the vehicle for a user to sit;
An air supply unit 120 formed integrally or separately installed inside the vehicle seat 110 to provide a preset air supply path in the vehicle seat 110;
A thermoelectric module unit 130 coupled to the inlet 122 of the air supply unit 120 and forcibly inhaling air from the outside according to a user's manipulation, heating or cooling, and supplying it to the air supply unit 120;
An electric heating element 140 that is installed on the reaction side of the thermoelectric module unit 130 and automatically applies heat to the reaction side when temperatures of the working side and the reaction side are outside a preset temperature range;
A temperature sensing unit provided on the vehicle seat 110 and/or the thermoelectric module unit 130 and including at least one temperature sensing sensor 151, 153, 155 for measuring the temperature of air supplied to the air supply unit 120 (150) and;
A control unit 160 installed inside the vehicle and configured to adjust the intensity of the heating mode or the cooling mode and each mode by the user;
By controlling the direction of the direct current applied to the thermoelectric module unit 130 according to the operation of the operation unit 160, the air passing through the thermoelectric module unit 130 is heated or cooled, and in the heating mode, the external temperature and the When the temperature on the reaction side of the thermoelectric module unit 130 is out of a preset temperature range, a control unit that heats the electric heating element 140 installed on the reaction side of the thermoelectric module unit 130 to perform temperature deviation control ( 170) cooling and heating supply system of the vehicle seat, characterized in that configured to include.
The method of claim 1,
The thermoelectric module unit 130,
The upper case (131a) and the lower case (131b) are coupled to each other in a vertical direction to form an installation space therein, and an air intake port (131-1) for inhaling external air is formed at one end, and an air intake port (131-1) is formed at one end of the A first air outlet (131-2) coupled to the inlet (122) of the air supply unit (120) to supply air passing through the working side of the thermoelectric module unit (130) to the air supply unit (120) is formed, and , A case 131 having a second air outlet (131-3) formed at the other end to discharge air passing through the reaction side of the thermoelectric module unit 130;
It is mounted in the installation space formed inside the case 131, the action surface (S3) is arranged so that the reaction surface (S1) is located at the lower side, and the action surface (S3) under the control of the control unit 170 ) A thermoelectric element 133 for performing heat generation or heat absorption;
Consisting of an upper heat dissipation plate 135a surrounding the working surface S3 of the thermoelectric element 133 and a lower heat dissipating plate 135b surrounding the reaction surface S1 of the thermoelectric element 133, the thermoelectric element 133 A heat dissipating element 135 for discharging generated heat to the outside;
It is mounted on the front end of the upper heat sink 135a or the lower heat sink 135b mounted in the installation space formed inside the case 131, and forcibly generates wind under the control of the control unit 170 so that the upper heat sink 135a A cooling and heating supply system of a vehicle seat, characterized in that consisting of a blower 137 having a first blower (137a) supplied to the lower heat sink (135b) and a second blower (137b) supplied to the lower heat sink (135b).
The method of claim 1,
The control unit 170,
An A/D converter 171 for converting a temperature value sensed in the form of an analog signal into a digital signal by the first to third temperature sensors (151, 153, 155);
A forward and reverse conversion circuit 172 for converting a direction of a direct current applied to the thermoelectric element 133;
Controls the direction of the output current of the forward/reverse switching circuit 172 according to the temperature values detected by the first to third temperature sensors (151, 153, 155) according to the temperature value set by the operation unit 160, or the electric heating element ( 140. A cold and hot mattress device using a thermoelectric element, characterized in that it comprises a microprocessor (173) for controlling the direction of the output current of the forward/reverse conversion circuit (172) in order to heat the 140).
The microprocessor 173 of the control unit 170,
When the outside air temperature of the vehicle seat 110 is an image, the temperature of the reaction surface S1 of the thermoelectric element 133 is about 2 to 3° C. relative to the outside air temperature of the vehicle seat 110 so that heat absorption is smooth. Thermoelectric, characterized in that the temperature difference is controlled so that condensation or condensation of water vapor does not occur on the working surface (S3) of the thermoelectric element 113, ignoring the outside temperature when the outside temperature is below zero. Cold and hot mattress device using elements.

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