JP2006123874A - Seat heating/cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To materialize a seat heating/cooling device capable of improving the comfortability of seat air-conditioning by selecting and controlling applied voltage applied on a blower and a Peltier element according to environmental conditions in a vehicular cabin. <P>SOLUTION: The seat heating/cooling device comprises a seat 3 formed with an air blow-off hole 3a, the blower 51 leading air in the vehicular cabin into a seat 3 and blowing off that to the air blow-off hole 3a, a Peltier element 52 heating/cooling the led air in the vehicular cabin, and a seat air-conditioning control device 37b controlling the blower 51 and the Peltier element 52. The seat heating/cooling device is provided with an air-conditioning unit 21, and an air-conditioning control device 37a controlling the air-conditioning unit 21 on the basis of operation information set by an occupant and temperature information detected by various sensors. The seat air-conditioning control device 37b controls at least either one of the air volume of the blower 51 or the applied voltage of the Peltier element 52 according to an air-conditioning load obtained on the basis of the set information and the detected information. Thus, comfortability is improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heating / cooling device for a sheet that blows out air-conditioned air heated and cooled toward an air blowing hole formed in a vehicle seat, and more particularly, relates to capacity control of a heating / cooling device that heats and cools.

  Conventionally, as this type of sheet heating / cooling device, for example, as shown in Patent Document 1, a sheet having air blowing holes formed on the surface, and a communication path communicating with the air blowing holes formed in the sheet, And a heating / cooling device including a Peltier element disposed in the communication path, and a blower for blowing air toward the air blowing hole.

  The seat heating / cooling device mounted on the vehicle provided with the air conditioner includes control means for correcting the operating state of the seat heating / cooling device based on the operating state or setting information of the air conditioning device. As a result, the operating state of the heating / cooling device for the seat can be corrected based on the operating state or setting information of the air-conditioning device (for example, the detection temperature of the set temperature or various sensors). The device can be linked.

Therefore, the occupant can change the operation state of the seat heating / cooling device by setting or resetting the operation state of the air conditioning device, and the vehicle interior space can be shortened in a short time by the seat heating / cooling device and the air conditioning device. A comfortable vehicle interior space can be created with a simple operation at a desired temperature. Furthermore, the operating state of the heating / cooling device for seats can be corrected using the set temperature of the air-conditioning device as the setting temperature of the heating / cooling device for sheets, so that the air-conditioning device and the heating / cooling device for seats are operated at the same set temperature. (For example, refer to Patent Document 1).
JP-A-10-297243

  However, according to Patent Document 1, the air conditioner is provided with an auto switch for switching the operation state between automatic / manual on the air conditioner operation panel, so that the air conditioner controller can respond to the air conditioning heat load in the passenger compartment. Control is performed so as to adjust the temperature of the conditioned air blown into the passenger compartment, the amount of air blown, and the like.

  On the other hand, in the seat heating / cooling device, the seat operation panel is provided with operation switches for performing operations such as switching between cold air / warm air, switching between seat air-conditioning operation / stop and adjusting the set temperature. It is not configured so that the switching of the air flow rate and the capability switching of the Peltier element can be switched with an operation switch.

  In other words, the seat air conditioning control device applies a constant applied voltage to the Peltier element and the blower, and outputs the rated heating / cooling capacity to perform the ON / OFF operation based on the seat temperature to adjust the temperature. ing. Moreover, since the rated heating / cooling capacity is the capacity that satisfies the maximum air conditioning heat load in the passenger compartment, for example, if the air conditioning heat load decreases due to the operation of the air conditioner, the differential in temperature control increases and the air conditioning There is a problem that the comfort is lower than that of the device.

  Further, in the case of a Peltier element, generally, when the applied voltage is increased to increase the heating / cooling capacity, the coefficient of performance (COP) decreases, so the applied voltage is kept constant as described above. There is a problem that the performance efficiency (COP) cannot be improved.

  Accordingly, an object of the present invention is to take the above-mentioned points into consideration, and by selecting and controlling the applied voltage applied to the blower and the Peltier element according to the environmental conditions in the passenger compartment, An object of the present invention is to provide a heating / cooling device for a seat that can improve comfort.

In order to achieve the above object, the technical means described in claims 1 to 4 are employed. That is, in the first aspect of the invention, the seat (3) having the air blowing hole (3a) formed on the surface thereof, and the vehicle interior air are guided into the seat (3) and directed toward the air blowing hole (3a). A blower (51) for blowing air, a Peltier element (52) for heating and cooling vehicle interior air guided by the blower (51), and a seat air-conditioning control means for controlling the blower (51) and the Peltier element (52) 37b), a heating / cooling device for a sheet,
The seat air-conditioning control means (37b) applies the air volume of the blower (51) and the application of the Peltier element (52) according to the air-conditioning heat load determined based on the setting information set by the passenger and the detection information detected by each sensor. It is characterized by controlling at least one of the voltages.

  According to the first aspect of the present invention, for example, when the air conditioning heat load in the vicinity of the seat (3) is large and small, at least the air flow rate of the blower (51) and the applied voltage of the Peltier element (52) By controlling one of them, it is possible to output the heating / cooling capacity corresponding to the air conditioning heat load obtained from the setting information and the detection information. Therefore, when the air-conditioning heat load is small, the coefficient of performance is improved by reducing the applied voltage of the Peltier element (52) to a value greater than that, and the differential in the temperature control can be reduced, so that the comfort can be improved.

In the invention according to claim 2, the seat (3) having the air blowing hole (3a) formed on the surface, and the vehicle interior air are guided into the seat (3) and blown toward the air blowing hole (3a). A blower (51), a Peltier element (52) for heating and cooling the passenger compartment air guided by the blower (51), and a seat air conditioning control means (37b) for controlling the blower (51) and the Peltier element (52) In the sheet heating and cooling device comprising:
An air conditioning unit (21) for blowing the temperature-conditioned air into the passenger compartment, air conditioning control means (37a) for controlling the air conditioning unit (21) based on operation information set by the passenger and detection information detected by each sensor; And the seat air conditioning control means (37b) controls at least one of the air flow rate of the blower (51) and the applied voltage of the Peltier element (52) according to the air conditioning heat load determined by the air conditioning control means (37a). It is characterized by doing.

  According to the second aspect of the present invention, for example, when the air-conditioning heat load in the vicinity of the seat (3) is large and small, at least the air flow rate of the blower (51) and the applied voltage of the Peltier element (52) By controlling one of them, it is possible to output the heating / cooling capacity corresponding to the air conditioning heat load obtained from the setting information and the detection information. Therefore, when the air-conditioning heat load is small, the coefficient of performance is improved by reducing the applied voltage of the Peltier element (52) to a value greater than that, and the differential in the temperature control can be reduced, so that the comfort can be improved. In addition, the air conditioning heat load can be easily obtained from the existing air conditioner.

  In the invention according to claim 3, the seat air conditioning control means (37b) is configured such that when the calculated air conditioning thermal load increases to a predetermined value or more, the air flow rate of the blower (51) and the applied voltage of the Peltier element (52). Capacity-priority operation mode for controlling to increase at least one of the air flow rate, and when the air-conditioning heat load is reduced below a predetermined value, reduce at least one of the air flow rate of the blower (51) and the applied voltage of the Peltier element (52) And an efficiency priority operation mode for controlling the performance efficiency to increase.

  According to the invention described in claim 3, this type of Peltier element (52) has a high performance efficiency although the heating / cooling capacity is small when the blowing quantity is small, from the relationship between the heating / cooling ability and the blowing quantity. When the air flow rate is large, the heating / cooling capacity is large, but the performance efficiency is low.

  Therefore, in the present invention, when the air-conditioning heat load is equal to or less than a predetermined value, the performance efficiency of the Peltier element (52) can be increased by performing control to reduce the heating / cooling capacity of the Peltier element (52), and the temperature The differential in control can be reduced. On the other hand, when the air-conditioning heat load is equal to or greater than a predetermined value, the temperature can be controlled to a desired set temperature in a short time by performing control to increase the heating and cooling capacity of the Peltier element (52).

  In the invention according to claim 4, the air conditioning thermal load is based on the target blowing temperature (TAO) obtained based on the operation information set by the occupant and the detection information detected by each sensor, and the target blowing temperature (TAO). Any of the air flow for air conditioning required, the temperature blown out from the air conditioning unit (21), the temperature in the passenger compartment, the temperature blown out from the Peltier element (52), and the temperature of the intake air blown into the Peltier element (52) It is characterized by using one or more.

  According to the fourth aspect of the present invention, as the air conditioning heat load, in addition to the general target blowout temperature (TAO), specifically, the airflow for air conditioning, the blowout temperature blown from the air conditioner, the vehicle interior temperature By using the blowing temperature blown out from the Peltier element (52) and the intake air temperature blown into the Peltier element (52), highly accurate temperature control can be performed. Thereby, the comfort can be improved.

  In the invention according to claim 5, when the seat air conditioning control means (37b) wants to change the capacity by reducing the air flow rate of the blower (51) and the applied voltage of the Peltier element (52) from the present level, the Peltier After decreasing the applied voltage of the element (52), the air flow rate of the blower (51) is controlled to be sequentially reduced, and the air flow rate of the blower (51) and the applied voltage of the Peltier element (52) are increased from the current level. Then, when it is desired to change the capacity, the control is performed such that the applied voltage of the Peltier element (52) is increased after the air flow rate of the blower (51) is sequentially increased.

  According to the fifth aspect of the present invention, this type of Peltier element (52) has a heating / cooling capacity based on the relationship between the heating / cooling capacity with the air flow rate as a parameter and the applied voltage of the Peltier element (52). If you want to increase the flow rate, increase the applied voltage and then control to increase the applied voltage. Conversely, if you want to reduce the heating and cooling capacity, control the flow rate to decrease the applied voltage and then increase the flow rate. If the control is performed to sequentially decrease the coefficient of performance, the coefficient of performance improves. Therefore, in the present invention, the performance efficiency of the Peltier element (52) can be improved by controlling as described above.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.

(First embodiment)
Hereinafter, the heating and cooling apparatus for a sheet according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a schematic diagram showing the overall configuration of a vehicle air conditioner and a seat heating / cooling device when the present invention is applied to a vehicle air conditioner, and FIG. 2 is a diagram showing the mounting of the seat heating / cooling device on a vehicle. It is a schematic diagram which shows a form.

  First, as shown in FIG. 1, the heating / cooling device for seats includes a seat 3 including a backrest portion 3c and a seating portion 3b, and a heating / cooling device 5 disposed in a space 6 formed below the seat 3. And a seat air-conditioning control device 37b, which is a seat air-conditioning control means for controlling the heating and cooling device 5, and a seat air-conditioning operation panel 54.

  The backrest portion 3c has a first duct 3e communicating with the space 6 therein, and a plurality of air blowing holes 3a communicating with the first duct 3e. The seating portion 3b has a second duct 3d communicating with the space 6 therein, and a plurality of air blowing holes 3a communicating with the second duct 3d.

  The heating / cooling device 5 includes a blower 51 and a Peltier element 52, and the blower 51 guides the passenger compartment air into the seat 3 and blows air toward the air outlet 3 a via the Peltier element 52. The Peltier element 52 is a well-known thermoelectric element that converts electric power into heat, and includes a first heat exchange part 52a and a second heat exchange part 52b, and is electrically connected to a DC power source (not shown). The first heat exchanging part 52a and the second heat exchanging part 52b are composed of an electrode part (not shown) connected to a thermoelectric semiconductor inside and a large number of heat radiation and heat absorption fin parts on the outside, and current flows. The vehicle interior air guided by the blower 51 depending on the direction is heated and cooled.

  By the way, an exhaust duct 3f communicating with the outside of the seat 3 is formed in the space 6, and the exhaust duct 3f is partitioned by a partition plate (not shown) between the first duct 3e and the second duct 3d described above. That is, the air-conditioning air heated and cooled by the first heat exchanging part 52a and the exhaust gas heated and cooled by the second heat exchanging part 52b are not mixed. In the present embodiment, the downstream end of the exhaust duct 3f is opened in the vehicle interior. However, the present invention is not limited thereto, and the downstream end of the exhaust duct 3f may be extended to exhaust outside the vehicle interior. .

  Moreover, 53 shown in the figure is a temperature sensor, and this temperature sensor 53 detects the blowing temperature of the conditioned air blown out from the air blowing hole 3a as the seat temperature. And it electrically connects so that the temperature information detected with the temperature sensor 53 may be output to the sheet | seat air-conditioning control apparatus 37b.

  The seat air conditioning control device 37b is mainly composed of a microcomputer, and a built-in ROM (not shown) is provided with a preset seat air conditioning control program. Temperature information from the temperature sensor 53, the seat In addition to the operation information from the air conditioning operation panel 54, electrical connection is made so that control information from the air conditioning control device 37a, which is an air conditioning control means, is input, and the blower 51 is connected to the blower 51 based on temperature information, operation information, and control information. The Peltier element 52 is controlled.

  The seat air-conditioning operation panel 54 includes operation switches for performing operations such as switching between hot air / cold air, starting / stopping the seat air-conditioning operation, and adjusting the set temperature of the blow-out temperature, and the occupant is seated on the seat 3. It is arranged at a position where it can be operated in the state.

  Next, the configuration of the air conditioning unit 21 will be described. On the upstream side of the air duct 22, there are provided outside air suction ports 23a and 23b for sucking air outside the vehicle compartment (outside air) and inside air suction ports 24a and 24b for sucking air inside the vehicle cabin (inside air). The mixing ratio of the inside / outside air sucked from the ports 23a, 23b, 24a, 24b is switched by the inside / outside air doors 25a, 25b.

  A blower 26 is provided in the blower duct 22, and an evaporator 28, an air mix door 29, and a heater core 30 in which engine cooling water circulates on the downstream side of the blower 26 constitute a refrigeration cycle (not shown). Is provided. By adjusting the opening degree of the air mix door 29, the mixing ratio of the air passing through the heater core 30 and the air not passing through is adjusted to adjust the temperature of the conditioned air.

  And on the downstream side of the air duct 22, a defroster opening 31 connected via a duct to a defroster outlet (not shown) that blows conditioned air toward the front glass of the vehicle, and toward the upper body of the occupant A face opening 32 connected via a duct to a face outlet (not shown) that blows conditioned air and a foot outlet (not shown) that blows conditioned air toward the feet of the occupant are connected via a duct. Foot openings 33 are provided, and control doors 34, 35, and 36 are provided upstream of the openings 31, 32, and 33, respectively.

  As shown in FIG. 2, the air conditioning unit 21 is disposed in an instrument panel (not shown) in front of the passenger compartment, and the heating / cooling device 5 is disposed in each seat 3 of the passenger seat. 37a and the seat air conditioning control device 37b are configured to be electrically connected. As will be described later, reference numeral 38 shown in the figure is an inside air temperature sensor for detecting the inside air temperature of the passenger compartment air.

  Next, the air conditioning unit 21 configured as described above is controlled by the air conditioning control device 37a. The air-conditioning control device 37a is mainly composed of a microcomputer, and a built-in ROM (not shown) is provided with a preset air-conditioning control program for detecting the air-conditioning heat load in the passenger compartment. Detection signals Tr, Tam, and Ts detected from the inside air temperature sensor 38, the outside air temperature sensor 39, and the solar radiation sensor 40 that detects the amount of solar radiation are input, and the operation from the air conditioner operation panel 44 disposed in the instrument panel. A signal is input. Then, by executing the air conditioning control program, the operation mode, the air outlet mode, the air outlet temperature, the air flow rate, and the like of the air conditioning air blown from the air conditioning unit 21 into the vehicle interior are controlled.

  Although not shown, the air conditioner operation panel 44 has an A / C switch for turning on / off the air-conditioning operation, an auto switch for switching the operation mode to automatic / manual, and switching of the outlets to the face, bi-level, foot, 5 blowout mode changeover switches for manually switching between the foot defroster and the defroster, an intake mode changeover switch for manually changing the intake mode to outside air intake / internal air circulation, a blower changeover switch for manually changing the air flow, and air conditioning control There is provided a temperature setting switch for manually setting a set temperature that is a target value.

  Incidentally, the auto switch is an operation switch for automatically controlling the switching of the operation mode of the blowing mode switching switch, the intake mode switching switch, and the air blowing switching switch. When this operation signal is input to the air conditioning control device 37a, the occupant Based on the set temperature and the target blowout temperature TAO calculated based on the inside air temperature Tr detected by the inside air temperature sensor 38, the outside air temperature sensor 39, and the solar radiation sensor 40, the outside air temperature Tam, and the solar radiation amount Ts, an air conditioning unit. The control amount such as the operation mode of the conditioned air blown out from the vehicle 21 into the passenger compartment, the blowout temperature, and the amount of blown air is obtained and output to the air conditioning unit 21 as control information, and the air conditioning control by the air conditioning unit 21 is performed.

  On the other hand, the seat air conditioning control device 37b of the present embodiment is configured to input at least the target blowing temperature TAO in the control information from the air conditioning control device 37a. Then, the seat heating / cooling device is controlled by the seat air conditioning control device 37b. In addition to the target blowout temperature TAO, an airflow for air conditioning, an inside air temperature Tr in the passenger compartment, and the like may be input.

  Next, the operation of the sheet heating / cooling device will be described. Specifically, the outputs of the blower 51 and the Peltier element 52 are controlled based on the flowchart of the seat air conditioning control program shown in FIG. First, the control process is started by operating an operation switch (not shown) and a cold air / hot air selection switch. In step 210, the target blowing temperature TAO is read from at least the air conditioning control device 37b. In addition to the target blowing temperature TAO, the above-described blowing temperature, air flow rate, or the inside air temperature Tr detected by the inside air temperature sensor 38 may be read.

  In step 220, the seat temperature Ta detected by the temperature sensor 53, the set temperature from the seat air conditioning operation panel 54, and the cold air operation mode are read. Next, in step 230, it is determined whether or not the sheet temperature Ta is equal to or lower than a predetermined temperature (for example, about 30 ° C.). Here, the seat temperature Ta read in step 220 is used to determine whether or not the air conditioning heat load in the passenger compartment near the seat 3 is smaller than a predetermined value.

  That is, if the seat temperature Ta is equal to or lower than a predetermined temperature (for example, about 30 ° C.), it is determined that the air-conditioning heat load is smaller than the predetermined value, and the operation of the heating / cooling device 5 is changed to the efficiency-priority operation mode in step 240. Control to be. On the other hand, in step 220, if the seat temperature Ta is equal to or higher than a predetermined temperature (for example, about 30 ° C.), it is determined that the air-conditioning heat load is larger than the predetermined value, and in step 270, the heating / cooling device 5 is operated. The control is performed so that the priority operation mode is obtained.

  Specifically, in the efficiency-priority operation mode, the Peltier ventilation amount Gp and the applied voltage Vp applied to the Peltier element 52 are obtained in steps 240 and 250. First, it is a characteristic indicating the relationship between the Peltier air blowing amount Gp and the target air blowing amount Va shown in step 240. The target air flow rate Va is the air flow rate obtained by calculating the target seat temperature based on the target air temperature TAO, the seat temperature Ta, and the set temperature read in Steps 210 and 220 and obtaining the air conditioning capacity characteristics described later. Based on the target blowing temperature TAO, the Peltier blowing amount Gp is obtained from the target blowing amount Va.

  Then, the applied voltage Vp applied to the Peltier element 52 is obtained from the characteristic indicating the relationship between the Peltier air blowing amount Gp and the applied voltage Vp shown in step 250. In step 260, the obtained Peltier air blowing amount Gp and the applied voltage Vp are determined and output to the blower 51 and the Peltier element 52. In addition, the Peltier ventilation amount Gp output to the blower 51 is converted into a voltage and output.

  On the other hand, in the capacity-priority operation mode, specifically, in steps 270 and 280, the Peltier air blowing amount Gp and the applied voltage Vp applied to the Peltier element 52 are obtained. And it is the characteristic which shows the relationship between the Peltier ventilation volume Gp shown in step 270, and the target ventilation volume Va. The characteristic at this time is set so that the Peltier air blowing amount Gp increases from step 240 because the air conditioning heat load is large. Therefore, here, the Peltier air blowing amount Gp is obtained from the target air blowing amount Va based on the target blowing temperature TAO.

  Then, the applied voltage Vp applied to the Peltier element 52 is obtained from the characteristic indicating the relationship between the Peltier air blowing amount Gp and the applied voltage Vp shown in step 280. Here again, the characteristic indicating the relationship between the Peltier air blowing amount Gp and the applied voltage Vp is set so that the applied voltage Vp increases more than in Step 250. In step 260, the obtained Peltier air blowing amount Gp and the applied voltage Vp are determined and output to the blower 51 and the Peltier element 52.

  Here, the relationship between the Peltier air blowing amount Gp of the Peltier element 52, the heat absorption amount, and the coefficient of performance COP will be described with reference to FIG. FIG. 4 is a seat air conditioning capability characteristic in the cold air operation of the Peltier element 52. That is, as shown in FIG. 4, the endothermic amount shows a characteristic that the endothermic amount increases sequentially by increasing the Peltier air blowing amount Gp, exhibits the maximum capacity at the point B, and then decreases sequentially.

  And the coefficient of performance COP shows the characteristic which declines one by one by making the Peltier ventilation amount Gp increase from the A point shown in the figure. That is, when the Peltier air blowing amount Gp is small, the endothermic amount is small, but the coefficient of performance COP is high. Further, when the Peltier air blowing amount Gp is large, the heat absorption amount is large, but the coefficient of performance COP is low.

  By the way, in the present invention, in the efficiency priority operation mode, control is performed so as to output the endothermic amount at point A at which the efficiency shown in the figure is maximum, and in the capacity priority operation mode, the endothermic amount shown in the figure is maximum. Control is performed to output the endothermic amount at point B.

  As a result, when the air conditioning heat load is large, an applied voltage with the maximum capacity is applied to the Peltier element 52, and when the air conditioning heat load is smaller than a predetermined value, an applied voltage that maximizes the coefficient of performance COP is applied to the Peltier element 52. . However, at this time, although the amount of heat absorption is reduced, since the fluctuation of the air-conditioning heat load by the air-conditioning unit 21 is in a stable state, the differential in the temperature control of the seat air-conditioning becomes small, so that comfort can be improved.

  In addition, when the air conditioning heat load is large, the desired temperature of the seat can be set in a short time by operating the Peltier element 52 together with the air conditioning unit 12 with the maximum capacity. In the present embodiment, the seat temperature Ta is used in step 230 for determining the magnitude of the air conditioning heat load. In addition to this, the target blowing temperature TAO and the air conditioning airflow blown from the air conditioning unit 21 are used. One or more of the blowing temperature, the inside air temperature Tr detected by the inside air temperature sensor 38, and the intake air temperature blown to the Peltier element 52 may be used.

  By the way, when the operation information from the seat air-conditioning operation panel 54 is in the cold air mode, the Peltier element 52 cools the cabin air guided by the blower 51 by the first heat exchange unit 52a and heats it by the second heat exchange unit 52b. Is done. The cold air cooled by the first heat exchange part 52a is blown out from the blowout hole 3a through the first duct 3e and the second duct 3d. The warm air heated by the second heat exchange part 52b is discharged out of the passenger compartment through the exhaust duct 3f.

  On the other hand, when the operation information is in the warm air mode, the cabin air guided by the blower 51 is heated by the first heat exchange unit 52a and cooled by the second heat exchange unit 52b. The warm air heated by the first heat exchange unit 52a is blown out from the blowout hole 3a through the first duct 3e and the second duct 3d. The cold air cooled by the second heat exchange part 52b is discharged out of the passenger compartment through the exhaust duct 3f.

  In the above embodiment, FIG. 4 shows the seat air conditioning capability characteristics in the cold air operation. However, even in the heating operation, the Peltier air blowing amount Gp is small due to the characteristics indicating the relationship between the Peltier air blowing amount, the heat radiation amount, and the efficiency. In this case, the heat dissipation amount is small, but the coefficient of performance COP is high. Further, when the Peltier air blowing amount Gp is large, it can be said that the heat dissipation amount is large but the coefficient of performance COP is low.

  According to the heating and cooling apparatus for a sheet according to the first embodiment described above, for example, when the air conditioning heat load in the vicinity of the sheet 3 is large and small, the blowing amount Gp of the blower 51 and the applied voltage Vp of the Peltier element 52 are By controlling at least one of them, it is possible to output the heating / cooling capacity corresponding to the air conditioning heat load obtained from the setting information and the detection information.

  Therefore, when the air-conditioning heat load is small, the coefficient of performance COP is improved by reducing the applied voltage of the Peltier element 52 from a large value, and the differential in the temperature control can be reduced, so that the comfort can be improved. In addition, the air conditioning heat load can be easily obtained from the existing air conditioner.

  Specifically, the ability priority operation mode for controlling to increase at least one of the air flow rate of the blower 51 and the applied voltage of the Peltier element 52 and at least one of the air flow rate of the blower 51 and the applied voltage of the Peltier element 52 are reduced. Thus, by having an efficiency priority operation mode for controlling so that the performance efficiency is increased, when the air-conditioning heat load is equal to or less than a predetermined value, the Peltier element 52 is controlled to reduce the heating / cooling capacity of the Peltier element 52. The performance efficiency COP can be increased and the differential in temperature control can be reduced. On the other hand, when the air conditioning heat load is equal to or greater than a predetermined value, the temperature can be controlled to a desired set temperature in a short time by performing control to increase the heating / cooling capacity of the Peltier element 52.

  In addition to the seat temperature Ta blown from the Peltier element 52 as the air conditioning heat load, the target blowout temperature TAO, the air-conditioning airflow blown from the air conditioning unit 21, the blowout temperature, the cabin temperature, the Peltier element High-precision temperature control can be performed by using the intake air temperature blown to 52 or the like. Thereby, the comfort can be improved.

(Second Embodiment)
In the above embodiment, the seat air-conditioning control device 37b is electrically connected to read the target blowing temperature TAO from the air-conditioning control device 37a configured in the vehicle air-conditioning device, and the blower 51 and the Peltier element 52 are controlled. However, the present invention is not limited to this, and may be configured separately without being connected to the air conditioning control device 37a.

  However, in this case, for example, the inside air temperature sensor 38, the outside air temperature sensor 39, and the solar radiation sensor 40, which are sensors for detecting the air-conditioning heat load in the vicinity of the seat 3, are provided separately or provided in the vehicle. Alternatively, the detection information may be directly input to the seat air conditioning control device 37b from these existing sensors.

  Specifically, in the control processing of the seat air conditioning control program, as shown in FIG. 5, the detection signals Tr, Tam, and Ts detected from the inside air temperature sensor 38, the outside air temperature sensor 39, and the solar radiation sensor 40 in step 220a are detected. While being input, the seat temperature Ta detected by the temperature sensor 53, the set temperature from the seat air conditioning operation panel 54, and the cold air operation mode are read.

  Next, in step 220b, a target blowing temperature TAO is calculated based on these detection signals. The target blowing temperature TAO may be substituted with the target seat temperature TAOseat. According to this, the air blower 51 and the Peltier element 52 can be controlled separately from the air conditioner. In the present embodiment, the detection signals from the inside air temperature sensor 38, the outside air temperature sensor 39, and the solar radiation sensor 40 are read in step 220a. However, at least only the inside air temperature Tr detected by the inside air temperature sensor 38 is read. good.

(Third embodiment)
In the above embodiment, in the control processing of the seat air conditioning control program, as means for determining the air conditioning heat load, it is determined in step 230 whether or not the seat temperature Ta is equal to or lower than a predetermined temperature (for example, about 30 ° C.). However, the present invention is not limited to this. If the difference between the sheet temperature Ta and the target sheet temperature TAOseat is equal to or lower than a predetermined temperature (for example, about 5 ° C.), or less than a predetermined temperature (for example, about 5 ° C.), You may comprise so that it may determine whether it is more than predetermined temperature (for example, about 0 degreeC).

  Specifically, as shown in FIGS. 6 and 7, two determination means of step 230 a and step 230 b are replaced instead of step 230. As the determination value, the temperature difference between the sheet temperature Ta and the target sheet temperature TAOseat is determined by comparing with a predetermined temperature.

  More specifically, in Step 230a, it is determined whether or not the temperature difference between the sheet temperature Ta and the target sheet temperature TAOseat is equal to or lower than a predetermined temperature (for example, about 5 ° C.). In Step 230b, the sheet temperature Ta and It is determined whether the temperature difference from the target sheet temperature TAOseat is equal to or higher than a predetermined temperature (for example, about 5 ° C.).

  If YES in step 230a, it is determined again in step 230b. If YES, it is determined that the air-conditioning heat load is smaller than a predetermined value, and in step 240, the operation of the heating / cooling device 5 is performed with priority on efficiency. Control to be in mode. If NO in step 230b, it is determined that the sheet temperature Ta has reached the target sheet temperature TAOseat, and the process proceeds to step 290.

  In step 290, the Peltier air blowing amount Gp is determined to be 0, and the applied voltage Vp applied to the Peltier element 52 is determined to be 0. That is, this is an output value that stops the blower 51 and the Peltier element 52 when the seat temperature Ta reaches the target seat temperature TAOseat. If NO in step 230a, it is determined that the air-conditioning heat load is greater than a predetermined value, and in step 270, the operation of the heating / cooling device 5 is controlled so as to be in the capacity-priority operation mode.

  By the way, in the above embodiment, the Peltier airflow amount Gp for controlling the blower 51 and the applied voltage Vp applied to the Peltier element 52 obtained in any one of Steps 240 and 250 or Steps 270 and 280 are determined in Step 260. The Peltier air blowing amount Gp and the applied voltage Vp are determined and the control is performed so that they are output as they are to the blower 51 and the Peltier element 52. However, the present invention is not limited to this. The blower 51 and the Peltier element 52 may be controlled according to whether Vp is lowered or raised from the current level.

  This will be described based on the characteristic diagram shown in FIG. FIG. 8 is a characteristic diagram showing the relationship between the cooling capacity with the amount of blown air as a parameter, the applied voltage Vp applied to the Peltier element 52, and the performance efficiency COP. That is, the characteristic indicated by the solid line in the figure is the relationship between the cooling capacity and the applied voltage Vp with the air flow rate as a parameter, and the characteristic indicated by the broken line in the figure is the performance efficiency COP and the applied voltage Vp with the air flow rate as a parameter. This is a characteristic showing the relationship.

  Note that the air flow rate is indicated by parameters from the air flow level 1 to the air flow level 5, and the performance efficiency COP changes according to the applied voltage Vp at the same air flow rate. That is, when the applied voltage Vp decreases, the performance efficiency COP of the Peltier element 52 increases.

  Therefore, in this embodiment, a control procedure for the Peltier element 52 and the blower 51 is set based on the characteristics of the Peltier element 52. Specifically, when it is desired to reduce the cooling capacity by reducing each from point A (applied voltage 12V, air volume level 5) to point B (applied voltage 5V, air volume level 2), first decrease the applied voltage Vp ( If point D in the figure) is subsequently controlled (air volume 5 to air volume 2), the performance efficiency COP is controlled to decrease from the higher one.

  By the way, changing the air flow from point A (applied voltage 12V, air volume level 5) (C point in the figure) and changing it to point B (applied voltage 5V, air volume level 2), the performance efficiency COP should be changed on the low side. become. Conversely, to increase the cooling capacity from point B (applied voltage 5V, air volume level 2) to point A (applied voltage 12V, air volume level 5), respectively, first increase the air volume (air volume). 2 to air volume 5) After the control, the applied voltage should be increased.

  Therefore, in the present embodiment, in step 260a, the Peltier air blowing amount Gp and the applied voltage Vp obtained in either step 240, 250 or steps 270, 280 are determined, and the determined Peltier air blowing amount Gp and the applied voltage are determined. When it is desired to reduce Vp from the present level, after the applied voltage Vp is decreased, control is performed by outputting to the Peltier element 52 and the blower 51 so as to sequentially decrease the Peltier air blowing amount Gp.

  Here, when the determined Peltier air blowing amount Gp and the applied voltage Vp are to be increased from the present level, the Peltier air blowing amount Gp is sequentially increased and then the applied voltage Vp is increased.

  According to this, the performance efficiency of the Peltier element 52 is controlled by controlling the Peltier element 52 and the blower 51 as described above from the relationship between the cooling capacity using the air flow rate as a parameter and the applied voltage Vp applied to the Peltier element 52. COP can be increased.

(Other embodiments)
In the above embodiment, the heating / cooling device 5 including the blower 51 and the Peltier element 52 is disposed in the space 6 formed in the lower portion of the sheet 3, but the present invention is not limited thereto, and is formed in the lower portion of the sheet 3. One blower 51 is disposed in the space 6, and Peltier elements 52 are disposed in two portions in the backrest portion 3 c and the seating portion 3 b, respectively, and the blower 51 and the Peltier element 52 are not illustrated. It may be configured by connecting with.

  Moreover, although the air blower 51 was arrange | positioned in the space 6 in the sheet | seat 3, you may provide not only in this but in the vicinity of the sheet | seat 3. FIG.

It is a schematic diagram which shows the whole structure of the vehicle air conditioner and seat heating-cooling apparatus in 1st Embodiment of this invention. It is a schematic diagram which shows the mounting form to the vehicle of the heating-and-cooling apparatus for sheets in 1st Embodiment of this invention. It is a flowchart which shows the control processing of the seat air-conditioning control program in 1st Embodiment of this invention. It is a characteristic view which shows the relationship between the amount of Peltier ventilation, heat absorption amount, and efficiency. It is a flowchart which shows the control processing of the sheet | seat air-conditioning control program in 2nd Embodiment of this invention. It is a flowchart which shows the control processing of the sheet | seat air-conditioning control program in 3rd Embodiment of this invention. It is a flowchart which shows the control processing of the seat air-conditioning control program in the modification of 3rd Embodiment of this invention. It is a characteristic view which shows the relationship between the cooling capability which makes the ventilation volume the parameter in 3rd Embodiment of this invention, the applied voltage Vp applied to the Peltier device 52, and performance efficiency COP.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 ... Sheet 3a ... Air blowing hole 21 ... Air-conditioning unit 37a ... Air-conditioning control apparatus (air-conditioning control means)
37b ... Seat air conditioning control device (seat air conditioning control means)
51 ... Blower 52 ... Peltier element

Claims (5)

A sheet (3) having air blowing holes (3a) formed on the surface;
A blower (51) that guides vehicle interior air into the seat (3) and blows air toward the air blowing hole (3a);
A Peltier element (52) for heating and cooling the passenger compartment air guided by the blower (51);
In the heating / cooling device for a sheet, comprising: the air blower (51) and the sheet air-conditioning control means (37b) for controlling the Peltier element (52).
The seat air-conditioning control means (37b) is configured such that the air flow rate of the blower (51) and the Peltier element (52) according to the air-conditioning heat load determined based on the setting information set by the passenger and the detection information detected by each sensor. The heating / cooling device for a sheet, wherein at least one of the applied voltages is controlled. A sheet (3) having air blowing holes (3a) formed on the surface;
A blower (51) that guides vehicle interior air into the seat (3) and blows air toward the air blowing hole (3a);
A Peltier element (52) for heating and cooling the passenger compartment air guided by the blower (51);
In the heating / cooling device for a sheet, comprising: the air blower (51) and the sheet air-conditioning control means (37b) for controlling the Peltier element (52).
An air conditioning unit (21) that blows temperature-controlled air conditioning air into the passenger compartment, and air conditioning control means (37a) that controls the air conditioning unit (21) based on operation information set by the occupant and detection information detected by each sensor And
The seat air-conditioning control means (37b) controls at least one of the air flow rate of the blower (51) and the applied voltage of the Peltier element (52) according to the air-conditioning heat load obtained by the air-conditioning control means (37a). A sheet heating / cooling device.   The seat air-conditioning control means (37b) increases at least one of the air flow rate of the blower (51) and the applied voltage of the Peltier element (52) when the calculated air-conditioning heat load increases to a predetermined value or more. When the capacity priority operation mode to control and the air-conditioning heat load is reduced below a predetermined value, at least one of the blowing amount of the blower (51) and the applied voltage of the Peltier element (52) is reduced. The sheet heating / cooling device according to claim 1, further comprising an efficiency-priority operation mode that controls the performance efficiency to increase.   The air-conditioning heat load is a target blowing temperature (TAO) obtained based on operation information set by a passenger and detection information detected by each sensor, an air-conditioning airflow obtained based on the target blowing temperature (TAO), Any one or two of the blowing temperature blown out from the air conditioning unit (21), the cabin temperature, the blowing temperature blown out from the Peltier element (52), and the intake air temperature blown into the Peltier element (52) The heating / cooling device for a sheet according to claim 3, wherein two or more are used.   When the seat air conditioning control means (37b) wants to change the capacity by lowering the air flow rate of the blower (51) and the applied voltage of the Peltier element (52) from the current level, the seat air conditioning control means (37b) After reducing the applied voltage, control is made to sequentially reduce the air flow rate of the blower (51), and the air flow rate of the blower (51) and the applied voltage of the Peltier element (52) are increased from the current level. 5. The control according to claim 1, wherein when the capacity is desired to be changed, the applied voltage of the Peltier element (52) is controlled to increase after the amount of air blown from the blower (51) is sequentially increased. The heating and cooling device for a sheet according to any one of the above.

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