JP2006298037A - Vehicle seat air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide seat air conditioner capable of obtaining air conditioning feeling having no discomfort feeling even in intermediary seasons such as spring or autumn. <P>SOLUTION: The air conditioner calculates a target seat surface temperature index IST based on a target blowout temperature TAO determining an air conditioning control state in a cabin where the seats are disposed. Respective output characteristics of an electric heating element cooling down the seat surface and a seat blower blowing in cooling air are set as PL and FN, respectively, and output characteristics of a seat heater heating the seat surface are set as SH with respect to the IST. In a second area (corresponding to spring and autumn) when the IST is the intermediate value, the operation of a seat cooling means and a seat heating means are stopped to increase a cooling capacity or a heating capacity in accordance with the decrease or increase of the IST compared to the value. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat air conditioner.

  2. Description of the Related Art Conventionally, an air conditioner in a vehicle interior and a seat air conditioner are provided, and a target air outlet temperature in a seat air conditioner is determined in association with a target air temperature that determines an air conditioning control operation of the vehicle interior air conditioner (for example, a patent) Reference 1).

In this prior art, when the calculated target seat blowing temperature is low, cool air is blown out from the seat air conditioner to the seat, and when the target seat blowing temperature is high, hot air is blown out. According to whether the air conditioner is in a transient state or a stable state, the amount of cool air and warm air in the seat air conditioner is changed.
JP 2002-144849 A

  However, in the above-described conventional technology, the seat air conditioner sets the air flow rate so that cold air or hot air is always blown regardless of the target sheet blowing temperature, and the target sheet blowing temperature is particularly in an intermediate temperature range. In some cases, the air flow rate is always set to a relatively high value regardless of whether the air conditioning in the passenger compartment is in a transient state or a stable state.

  For this reason, cold air or hot air corresponding to the target sheet blowing temperature is blown out from the sheet in an intermediate period such as spring or autumn that is sensitive to slight temperature changes. Therefore, for example, in a situation where the vehicle interior is relatively warm and weak cold air is suitable in the intermediate period, there may be a feeling of uncomfortable seat air conditioning in which the hot air is blown from the seat.

  In view of the above points, an object of the present invention is to provide a seat air-conditioning apparatus that can provide an air-conditioning feeling without any discomfort even in an intermediate period such as spring and autumn.

  In order to achieve the above object, according to the first aspect of the present invention, in the first aspect of the present invention, a seat disposed in a vehicle interior that is air-conditioned by a vehicle interior air conditioner (120) that operates under an operating condition corresponding to a target outlet temperature (TAO) 1a) air conditioner (1), which is a sheet cooling means (2, 4a, 4b) for cooling the surface of the sheet, a sheet heating means (7a, 7b) for heating the surface of the sheet, a sheet cooling means, Seat air conditioning control means (8) for controlling the seat heating means according to the target seat surface temperature index (IST), and the target blowing temperature is calculated according to at least a target temperature (Tset) in the vehicle interior. The seat air conditioning control means calculates the target seat surface temperature index as a monotonically increasing function in accordance with the increase in the target outlet temperature, and the value of the first region where the target seat surface temperature index is relatively low. In some cases, the sheet cooling means is activated, and in the case where the target sheet surface temperature index is a value in the third region that is relatively high, the sheet heating means is activated, and the target sheet surface temperature index is higher than the value in the first region, When the value of the second region is lower than the value of the three regions, the operation of the sheet cooling unit and the sheet heating unit is stopped.

  According to this invention, the target seat surface temperature index calculated as a monotonically increasing function with respect to the target blowing temperature that determines the operating state of the vehicle interior air conditioner can be an index reflecting the air conditioning load around the seated person. In the range of the first region where the value of the target sheet surface temperature index is low, the sheet cooling means is operated to cool the sheet surface, and in the range of the third region where the value of the target sheet surface temperature index is larger than the first region. The sheet heating means is operated to heat the sheet surface, and both the sheet cooling means and the sheet heating means are deactivated in the range of the second area where the target sheet surface temperature index value is larger than the first area and smaller than the third area. The seat air conditioner may intervene unnecessarily in the interim period such as spring and fall when the target sheet surface temperature index is in the range of the second region, thereby worsening the air conditioning feeling. Ku, can be carried out without seat air conditioning control of the discomfort.

  According to the second aspect of the present invention, there is provided an air conditioner for a seat (1a) disposed in a vehicle interior that is air-conditioned by a vehicle interior air conditioner (120) that operates under an operating condition corresponding to a target outlet temperature (TAO). (1) a sheet cooling means (2, 4a, 4b) for cooling the surface of the sheet, and a sheet air conditioning control means (8) for controlling the sheet cooling means in accordance with a target sheet surface temperature index (IST). The target air temperature is calculated according to at least the target temperature (Tset) in the passenger compartment, and the seat air-conditioning control means calculates the target seat surface temperature index as a monotonically increasing function according to the increase in the target air temperature. And when the target sheet surface temperature index is a value of the first region that is relatively low, the sheet cooling means is operated, and the value of the second region where the target sheet surface temperature index is higher than the value of the first region. If there is characterized by stopping the operation of the seat cooling means.

  According to this invention, the target seat surface temperature index calculated as a monotonically increasing function with respect to the target blowing temperature that determines the operating state of the vehicle interior air conditioner can be an index reflecting the air conditioning load around the seated person. In the range of the first region where the value of the target sheet surface temperature index is low, the sheet cooling unit is operated to cool the sheet surface, and in the second region, the sheet cooling unit is deactivated. In the intermediate period such as spring and autumn when the index is in the range of the second region, the seat cooling means intervenes unnecessarily, and the air conditioning feeling is not deteriorated, and the seat air conditioning control without any sense of incongruity can be performed.

  According to a third aspect of the present invention, the sheet cooling means can be controlled so that the cooling capacity decreases as the target sheet surface temperature index increases. That is, when the target air temperature of the vehicle interior air conditioner is low, the cooling capacity is decreased according to the target sheet surface temperature index that increases in the first region in accordance with the increase of the target air temperature, in other words, the target seat By increasing the cooling capacity of the seat cooling means as the surface temperature index decreases in the first region, the surface of the seat can be cooled in conformity with the sensation of the occupant.

  In addition, a sheet | seat cooling means is equipped with the electrothermal element (4a, 4b) for cooling, and the sheet | seat blower (2) which ventilates the air cooled by an electrothermal element to the surface of a sheet | seat as described in Claim 4. be able to. In this case, the cooling capacity of the sheet cooling means can be determined by independently adjusting the cooling temperature of the electric heating element and the blowing amount of the sheet blower.

  Further, according to a fifth aspect of the present invention, the sheet cooling means has the maximum capacity of the electric heating element and the sheet blower when the target sheet surface temperature index is the first value (a, a1) on the minimum value side in the first region. Drive and the ability to reduce the electrothermal element from the maximum capacity while maintaining the maximum capacity of the sheet blower at the second value (b, b1) where the target sheet surface temperature index is greater than the first value. Can be driven.

  As a result, when the target sheet surface temperature index increases from the first value to the second value in the first region, the cooling capacity of the electric heating element is decreased while the sheet blower is set to the maximum capacity, that is, the air flow rate is set to the maximum value. By doing so, it is possible to perform seat air conditioning adapted to the sensation of the occupant and reduce energy consumption for driving the seat cooling means.

  According to a sixth aspect of the present invention, the sheet cooling means maintains the driving of the sheet blower when the target sheet surface temperature index is the third value (c, c1) on the maximum value side in the first region. When the driving of the heating element is stopped and the target sheet surface temperature index is in the range of the fourth value (d, d1) larger than the third value than the third value, the driving stop of the heating element is maintained. The driving of the sheet blower is maintained, and when it is in the range exceeding the fourth value, the operation of the electric heating element and the sheet blower can be stopped.

  Accordingly, excessive sheet cooling is not required in the range where the target sheet surface temperature index is from the third value on the maximum value side of the first region to the fourth value which is larger than that, that is, in the intermediate period (spring and autumn). When it feels like this, the driving of the heating element is stopped, only the seat blower is operated, and the air that is not cooled by the heating element can be blown as it is, and a comfortable seat air conditioning feeling that fits the sensation of the seated person Obtainable.

  Then, in the second region where the target seat surface temperature index exceeds the fourth value, the operation of the seat blower is stopped, and the seat surface is neither cooled nor heated, so that the seating sensation is warm. A comfortable and comfortable seat air conditioning feeling can be obtained.

  According to the seventh aspect of the present invention, there is provided an air conditioner (1) for a seat (1a) disposed in a vehicle interior that is air-conditioned by a vehicle interior air conditioner (120) that operates under an operating condition corresponding to a target outlet temperature (TAO). And sheet heating means (7a, 7b) for heating the surface of the sheet, and sheet air conditioning control means (8) for controlling the sheet heating means in accordance with the target sheet surface temperature index (IST), The target blowing temperature is calculated according to at least the target temperature (Tset) in the passenger compartment, and the seat air conditioning control means calculates the target seat surface temperature index as a monotonically increasing function according to the increase in the target blowing temperature. When the target sheet surface temperature index is a value of the third region that is relatively high, the sheet heating means is operated, and the target sheet surface temperature index is a value of the second region that is lower than the value of the third region. It is characterized by stopping the operation of the seat heating means.

  According to this invention, the target seat surface temperature index calculated as a monotonically increasing function with respect to the target blowing temperature that determines the operating state of the vehicle interior air conditioner can be an index reflecting the air conditioning load around the seated person. In the range of the third region where the target sheet surface temperature index value is relatively large, the sheet heating means is operated to heat the sheet surface, and the target sheet surface temperature index value is smaller than the third region. Since the sheet heating means is deactivated in the range, the sheet heating means does not unnecessarily intervene in the middle period such as spring and fall when the target sheet surface temperature index is in the range of the second region, and the air conditioning feeling is not deteriorated. Therefore, it is possible to perform seat air conditioning control without any sense of incongruity.

  In addition, as described in claim 8, the sheet heating means can be controlled to increase the heating capacity in accordance with the increase in the target sheet surface temperature index. That is, when the target blowout temperature of the vehicle interior air conditioner is high, the heating capacity is increased according to the target sheet surface temperature index that increases in the third region in accordance with the increase in the target blowout temperature. Heat can be adapted to the warmth of the seated person.

  According to a ninth aspect of the present invention, the sheet heating means has a region (corresponding to the second region) in which the target sheet surface temperature index is smaller than the fifth value (e, e1) on the minimum value side in the third region. By setting the operation stop state when the value becomes the value, it is possible to obtain a comfortable seat air-conditioning feeling adapted to the sensation of the seated person when it is felt that heating of the seat is unnecessary in the intermediate period (spring and autumn).

  According to a tenth aspect of the present invention, the sheet heating means includes a heat generating portion (7a, 7b), the sheet air conditioning control means sets a target temperature (Toh) according to the sheet surface temperature index, and the heat generating portion The temperature can be adjusted to a target temperature that increases as the heating capacity increases.

  In the seat air conditioning control means, when the target sheet surface temperature index is within a range from a fifth value to a sixth value (f, f1, f2) greater than the fifth value, as recited in claim 11. By setting the target temperature of the heat generating portion to be the lower limit temperature, the range of the target seat surface temperature index from the fifth value to the sixth value in the intermediate period in which the sensation of the seat is sensitive Thus, it is possible to maintain the lower limit temperature (Tmin), which is the lowest temperature at which the user feels a sense of warmth, and to obtain a comfortable seat air conditioning feeling that matches the warmth of the seated person. Note that the lower temperature limit is a temperature close to a normal body temperature (for example, 35 ° C.), and the occupant feels coldness or coldness for an object surface temperature lower than this temperature.

  Further, as described in claim 12, when the target sheet surface temperature index is in a range exceeding an eighth value (h, h1, h3) greater than the sixth value, the seat air conditioning control means By setting the target temperature to be maintained at the upper limit temperature (Tmax), it is possible to maintain the upper limit temperature (for example, 42 ° C.), which is the upper limit temperature that does not cause abnormal warm feeling (overheated feeling). It is possible to obtain a comfortable feeling of heating of the seat air conditioning adapted to the feeling of warmth of the seated person.

  Furthermore, as described in claim 13, the seat air conditioning control means increases the target temperature increase rate of the heat generating portion as the target seat surface temperature index increases in the range from the sixth value to the eighth value. Can be set to be small. That is, as the target seat surface temperature index approaches the eighth value, the target temperature of the heat generating portion is raised earlier, so that the seat can be heated hot when the passenger compartment is cold.

  In addition, when the target sheet surface temperature index is a relatively low value close to the sixth value, the increase rate of the target temperature of the heat generating portion is increased, in other words, the target sheet surface temperature index approaches the sixth value. When the temperature decreases, the rate of decrease in the target temperature of the heat generating portion is increased. As a result, as the surface temperature of the heated seat approaches the temperature at which it feels comfortable for the occupant, the target temperature of the heat generating part is set lower, and the temperature adjustment is lower in the surface temperature range where the temperature sensation becomes sensitive. can do.

  Further, as described in claim 14, an outside air temperature sensor (21 b) that detects an air temperature outside the passenger compartment is provided, and the seat air-conditioning control unit is configured to detect the temperature of the heat generating portion according to the detected decrease in the outside air temperature (Tam). It can be set to raise the target temperature. As a result, the lower the outside air temperature, the higher the surface temperature of the seat, and the seat air conditioning feeling can be improved so as to match the sensation of the seated person.

  According to the fifteenth aspect of the present invention, the seat air-conditioning control means provides an upper limit value (Tmax) for increasing the target temperature of the heat generating portion, thereby setting the upper limit of the surface temperature of the seat by the seat heating means. The maximum temperature that matches the feeling can be kept below.

  Furthermore, as described in claim 16, the seat air-conditioning control means reduces the target temperature of the heat generating portion in accordance with the detected decrease in the outside air temperature, and provides a lower limit (Tmin) for the decrease in the target temperature. Thus, the lower limit of the surface temperature of the sheet by the sheet heating means can be set to be equal to or higher than the minimum temperature suitable for the sensation of the seated person.

  In addition, as described in claim 17, the heat generating portion can be configured by a sheet heater (7a, 7b) embedded in the vicinity of the surface of the sheet.

  The invention according to claim 18 includes a seat temperature setting unit (111) for setting a temperature correction value (Δts) desired by a seat occupant, and the seat air-conditioning control means determines the target seat surface according to the temperature correction value. The temperature index is corrected so as to increase or decrease.

  According to the present invention, when the seat occupant sets his / her desired temperature correction value, the target seat surface temperature index is corrected to increase or decrease in accordance with the temperature correction value. The operating points of the seat cooling means and the seat heating means in the three regions can be changed according to the set temperature correction value, and the air-conditioning feeling can be given to the occupant more comfortably.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a seat air conditioner 1 according to the first embodiment, and shows a partial cross section of a vehicle seat 100. The seat air conditioner 1 can be provided, for example, in each of the four seats 100 of the vehicle. Hereinafter, the seat 100 for one driver seat (or the passenger seat) will be described.

  The seat 100 includes a seat cushion portion 101a that supports the buttocks of the seat occupant and a seat back portion 101b that supports the back of the seat occupant.

  The seat air conditioner 1 of the first embodiment is provided in a seat 100 and includes a seat blower 2, ducts 3a and 3b, electric heating element portions 4a and 4b, and seat heaters 7a and 7b.

  The seat blower 2 is provided in the seat cushion portion 101 a of the seat 100, and sucks in the passenger compartment air (inside air) that is ambient air from a suction port (not shown), and is provided on the blowing side of the seat blower 2. The air is sent to the ducts 3a and 3b.

  The duct 3a connects the seat blower 2 and the electric heating element portion 4a in the seat cushion portion 101a. The duct 3b connects the seat blower 2 and the electric heating element portion 4b in the seat back portion 101b.

  Each of the electrothermal element parts 4a and 4b includes a Peltier element. As is well known, the Peltier element includes a Peltier element that exhibits a cooling action and a heating action according to the polarity of the drive voltage, and a cooling / heating ability having a magnitude according to the drive power. In the first embodiment, the air around the element is cooled using the cooling action of the Peltier element.

  Ventilation paths 5a and 5b are provided between the electric heating element portions 4a and 4b and the sheet skins 6a and 6b. The seat skins 6a and 6b are provided with a large number of small air holes, and the air holes 5a and 5b communicate with the air holes 5a and 5b.

  Therefore, the air blown from the sheet blower 2 passes through the ducts 3a and 3b to reach the electric heating element portions 4a and 4b, and is cooled by the electric heating element portions 4a and 4b according to the driving power. Is blown out of the sheet 100 from the sheet skins 6a and 6b through the ventilation paths 5a and 5b.

  Each Peltier element of the electric heating element parts 4a and 4b and the sheet blower 2 are independently duty-driven. That is, the cooling capacity of the Peltier element (that is, the cooling temperature) and the air blowing amount of the sheet blower 2 can be controlled independently. In the first embodiment, the electric heating element portions 4a and 4b and the sheet blower 2 correspond to the sheet cooling means, and changing the cooling capacity of the sheet cooling means is the cooling generated by each Peltier element driven by duty. It means that the temperature is changed by changing the duty ratio and / or the amount of air blown by the seat blower 2 that is duty-driven is changed by changing the duty ratio.

  The seat heaters 7a and 7b as heat generating portions of the seat heating means are planar electric heaters embedded directly under the seat skins 6a and 6b in the seat cushions 101a and 101b, respectively, and FIG. Has been. The seat heaters 7a and 7b are controlled such that the driving voltage is turned on and off by a seat air conditioning ECU 8 described later, and the detected temperature of the seat heater becomes the set target temperature Toh. The seat heaters 7a and 7b are provided with a number of holes for communicating the sheet skins 6a and 6b and the ventilation paths 5a and 5b so that the cool air from the sheet cooling means can be blown out of the seat 100. It has become.

  FIG. 2 is a diagram illustrating an overall configuration of the electric machine control unit of the vehicle interior air conditioner 120 and the seat air conditioner 1 according to the first embodiment.

  The vehicle interior air conditioner 120 will be described. From the air conditioning unit 12 housed in an instrument panel (not shown) in front of the vehicle, the conditioned air with controlled air volume and air temperature from the face air outlet 19a and the foot air outlet 19b. However, it is blown out toward the seated person in the passenger compartment.

  The air conditioning unit 12 is a well-known unit having a duct 12a through which conditioned air passes, and will be briefly described below. An inside / outside air switching door 13 is provided at the most upstream part of the duct 12a. The inside / outside air switching door 13 is driven by a servo motor 13a to switch between outside air (air outside the vehicle) and inside air (air inside the vehicle interior), or introduces both into the duct 12a.

  The introduced inside / outside air is blown by the blower 14 to the downstream side of the duct 12a. The blower 14 is driven by a blower motor 14a, and the amount of air generated by the blower 14 by the blower voltage applied to the blower motor 14a, that is, the amount of air blown out from the air outlets 19a and 19b is determined.

  On the downstream side of the blower 14, an evaporator 15 is disposed as a cooling heat exchanger in which the refrigerant of the refrigeration cycle circulates, and on the downstream side of the evaporator 15 as a heating heat exchanger in which engine cooling water circulates. A heater core 16 is disposed.

  An air mix door 17 is provided between the evaporator 15 and the heater core 16. The opening degree of the air mix door 17 is controlled by the air mix motor 17a, and the cooling air from the evaporator 15 passes through the heater core 16 according to the opening degree and does not pass through the heater core 16 (bypassed). ) Adjust the ratio with the air volume. Thereby, the temperature of the air-fuel mixture of the cooling air and the heating air on the downstream side of the heater core 16, that is, the temperature of the air blown into the passenger compartment is adjusted.

  An outlet switching door 18 is provided on the downstream side of the heater core 16. The air outlet switching door 18 is driven by a servo motor 18a and has a face air outlet 19a that blows out toward the upper body of the seated person and a foot air outlet 19b that blows out toward the lower body and the feet of the seated person depending on the opening degree of the door. Adjust the amount of blown air. The air conditioning unit 12 is also provided with a defroster outlet for removing fog on the windshield of the vehicle.

  The vehicle interior air conditioner 120 includes an air conditioner ECU 20 as an air conditioning control device. The air conditioner ECU 20 is a known one that includes a microcomputer and peripheral circuits.

  An air temperature sensor 21a, an outside air temperature sensor 21b, a solar radiation sensor 21c, a water temperature sensor 21d, and an evaporator temperature sensor 21e are connected to the input side of the air conditioner ECU 20.

  The inside air temperature sensor 21a is disposed in front of the passenger compartment, detects the air temperature in the passenger compartment, and outputs an inside air temperature signal Tr corresponding to the detected temperature to the air conditioner ECU 20. The outside air temperature sensor 21b detects the outside temperature of the passenger compartment and outputs an outside air temperature signal Tam corresponding to the detected temperature to the air conditioner ECU 20.

  The solar radiation sensor 21c is disposed inside a front window (not shown), detects the amount of solar radiation into the passenger compartment, and outputs a solar radiation amount signal Ts corresponding to the amount of solar radiation to the air conditioner ECU 20. The water temperature sensor 21d detects the temperature of cooling water (that is, hot water flowing through the heater core 10) of an engine (not shown), and outputs a water temperature signal Tw corresponding to the detected temperature to the air conditioner ECU 20. The evaporator temperature sensor 21e detects the blown air temperature of the evaporator 9 and outputs an evaporator blown temperature signal Te corresponding to the detection signal to the air conditioner ECU 20.

  In addition, an air conditioner operation panel 22 in which a desired set temperature Tset is set by a seated person is connected to the input side of the air conditioner ECU 20. The air conditioner operation panel 22 is provided with other operation switches of the automatic air conditioner, but details thereof are omitted.

  Here, since the air conditioning control operation in the vehicle interior air conditioner 120 is a known content, it will be briefly described. The air conditioner ECU 20 reads each sensor information and an input signal such as a setting signal, and calculates a target blowing temperature TAO that determines the operating characteristics of the air conditioning unit 12 based on the formula 1.

TAO = Kset * Tset-Kr * Tr-Kam * Tam-Ks * Ts + C
... (Formula 1)
Tset is a set temperature set on the air conditioner operation panel 22, Tr is an internal air temperature signal detected by the internal air temperature sensor 21a, Tam is an external air temperature signal detected by the external air temperature sensor 21b, and Ta is a solar radiation sensor 21c. Is a solar radiation amount signal detected by Kset, Kr, Kam, and Ks are gains of each signal, and C is a constant.

  This target blowing temperature TAO is a temperature necessary for maintaining the vehicle interior at the set temperature Tset regardless of changes in vehicle environmental conditions.

  Then, based on the calculated target outlet temperature TAO and a control map stored in the air conditioner ECU 20, the air volume of the blower 14, the air mix door opening θ and the outlet mode are controlled.

  An applied voltage (blower voltage) to the blower motor 14a corresponding to the blown air volume is determined based on the control map of FIG. That is, the target blowout temperature TAO has a large air volume (blower voltage: Hi) on the low temperature side (cooling side) and the high temperature side (heating side), and a small air volume (blower voltage: Lo) in the intermediate temperature range (intermediate region) between them. The blower voltage is controlled so that

  Moreover, a blower outlet mode is determined based on the control map of FIG. That is, when the TAO is at a low temperature side, the foot air outlet 19b is fully closed and the conditioned air is blown out only from the face air outlet 19a. The FOOT mode for blowing out is selected. Further, in the TAO in the region between the two, the bi-level (B / L) mode is selected in which the face air outlet 19a and the foot air outlet 19b are simultaneously opened, and the conditioned air is blown out from both the air outlets 19a and 19b.

  The servo motor 18a is controlled in accordance with the selected outlet mode, and the opening degree of the outlet switching door 18 is set.

  Further, the opening θ of the air mix door 17 is calculated based on the mathematical formula 2.

θ = (TAO−Te) / (Tw−Te) × 100 (%) (Formula 2)
Te is an evaporator outlet temperature signal detected by the evaporator temperature sensor 21e, and Tw is a water temperature signal detected by the water temperature sensor 21d.

  The air mix door opening θ = 0 (%) is the maximum cooling position, and the entire amount of the cool air after passing through the evaporator 15 does not pass through the heater core 16, that is, bypasses the heater core 16 and flows downstream as cool air. . θ = 100 (%) is the maximum heating position, and the entire amount of cold air after passing through the evaporator 15 flows into the heater core 16 and is heated by the heater core 16.

  The air mix motor 17a is driven in accordance with the air mix door opening θ, and the actual opening of the air mix door 17 is set.

  By the vehicle interior air conditioning control as described above, the operating conditions such as the amount of blown air, the air outlet, and the temperature of the blown air when the conditioned air is blown from the air outlets 19a, 19b toward the seated person according to the target air temperature TAO. Is set. As a result, air-conditioning control is performed so that the temperature in the passenger compartment becomes the set temperature Tset.

  Next, an electric control unit of the seat air conditioner 1 according to the first embodiment will be described. The electric control unit of the seat air conditioner 1 includes a seat air conditioning operation panel 10 and a seat air conditioning ECU 8.

  As shown in FIG. 5, the seat air conditioning operation panel 10 includes a seat air conditioning operation switch 11. The seat air conditioning operation switch 11 includes a changeover switch 110 and a setting change dial 111.

  The change-over switch 110 is a push button switch, and is a mode switch that switches the operation state of the seat air conditioner 1 from automatic operation on (AUTO) → manual operation on (MANUAL) → off (AUTO) → AUTO each time it is pressed once. Output a signal. Note that the changeover switch 110 is provided with an auto display LED 110a, and, for example, a green lighting display is performed in the AUTO mode.

  The setting change dial 111 as the seat temperature setting unit is a switch for setting the temperature correction value Δts of the seat air conditioner 1 in the MANUAL mode, and is rotated according to the rotation position by rotating the outer periphery of the changeover switch 110. A temperature correction value signal Δts is output.

  The setting change dial 111 is provided with a setting position display LED 111a. The setting position display LED 111a lights up in, for example, orange to indicate the rotation position of the setting change dial 111 and to indicate the operation in the MANUAL mode.

  When the setting by the change-over switch 110 is AUTO, if the setting operation by turning the setting change dial 111 is performed, the mode can be automatically switched to the MANUAL mode.

  In the first embodiment, the temperature correction value Δts sets the seat air conditioner 1 to “warm” according to the amount of rotation in the right direction with respect to the correction value Δts = 0 at the neutral position of the setting change dial 111. Set, Δts = + 1, +2, +3. Similarly, according to the amount of rotation in the left direction, the setting for making the seat air conditioner 1 “cool”, Δts = −1, −2, −3 is performed. The temperature correction value Δts = −3 to +3 is a relative value.

  The seat air-conditioning operation panel 10 is connected to the air-conditioner operation panel 22 and the seat air-conditioning ECU 8 through signal lines, relays the target blowing temperature TAO and the outside air temperature signal Tam from the air-conditioner operation panel 22 to the seat air-conditioning ECU 8, and the seat air-conditioning operation switch. 11 outputs a switch signal (mode switching signal and temperature correction value signal) to the seat air conditioning ECU 8.

  A seat air conditioning ECU 8 serving as a seat air conditioning control means includes a well-known microcomputer including a CPU, a ROM, a RAM and the like, peripheral circuits thereof, a blower motor 2, Peltier elements 4a and 4b, seat heaters 7a and 7b, and the like. And a drive circuit for each actuator. The seat air-conditioning ECU 8 stores a control program for seat air-conditioning control in the ROM, performs various calculations and processing based on the control program, and performs drive control of each actuator based on the calculation processing. The seat air conditioning ECU 8 is installed in the seat cushion 101 a for each seat 100.

  The air conditioning operation panel 10 and the signal lines 10a and 10b are connected to the input side of the seat air conditioning ECU 8 through the seat air conditioning operation panel 10, and the target outlet temperature TAO calculated by the air conditioner ECU 20 is connected to the signal lines 10a and 10b. The outside air temperature signal Tam detected by the outside air temperature sensor 21b and the switch signal of the seat air conditioning operation switch 11 are input.

  A seat heater thermistor 9 that detects the temperature of the seat heaters 7a and 7b and outputs a detection signal thereof is connected to the input side of the seat air conditioning ECU 8.

  In addition, the seat air-conditioning operation panel 10 adds a power supply line for supplying driving power to each part of the seat air-conditioning apparatus 1 to the signal lines 10a and 10b connected to the air-conditioning operation panel 22 and the seat air-conditioning operation panel 10. The arrangement of the wire harness of the seat air conditioner 1 can be facilitated.

  Next, the operation of the seat air conditioner 1 according to the first embodiment will be described. When the seat air conditioning ECU 8 is turned on by turning on the changeover switch 110 of the seat air conditioning operation switch 11 (switching to AUTO), the control program stored in the memory starts and follows the routine shown in FIG. The seat air conditioning control process is repeatedly executed at regular intervals.

  After the start, first, in step S100, the set value (switch signal) and the outside air temperature signal Tam in the seat air conditioning operation panel 10 are read. Next, in step S110, the target blowing temperature TAO calculated by Formula 1 in the vehicle interior air conditioner 120 is read.

  Next, in step S120, a target sheet surface temperature index IST is calculated based on the read information. And according to the calculated target sheet surface temperature index IST, based on a control map to be described later, the control amount, that is, the cooling capacity of the electric heating element portions 4a and 4b as the sheet cooling means and the air blowing amount of the sheet blower 2, or The target temperatures of the sheet heaters 7a and 7b, which are sheet heating means, are set, and these control amounts are output to each drive circuit.

  By repeating these processes, the seat cooling means or the sheet heating means of the seat air conditioner 1 cools or heats the surface of the seat 100 in accordance with the target seat surface temperature index IST, so that the occupant adapts to the warm feeling. Seat air conditioning feeling can be given.

  Here, a calculation method of the target sheet surface temperature index IST and each control amount will be described. The target seat surface temperature index IST is determined as a monotonically increasing function of the target outlet temperature TAO based on the target outlet temperature TAO that determines the operating state of the vehicle interior air conditioner 120.

  That is, the value of the target sheet surface temperature index IST is determined so as to increase or become constant as the value of the target blowing temperature TAO increases. For example, the target sheet surface temperature index can be calculated by a linear function of TAO, IST = C1 · TAO + C2, (C1: positive coefficient, C2: constant). Alternatively, the coefficient C1 and the constant C2 may be changed according to the value of TAO. These can be designed according to the air-conditioning environment in the passenger compartment.

  As can be understood from FIGS. 3, 4, and Equation 2, in the region where the target outlet temperature TAO is low (small value), the vehicle interior is maintained in the cooling state, and in the high (large value) region, the vehicle interior is heated. State is maintained. Therefore, the target seat surface temperature index IST determined according to the target blowing temperature TAO can be used as an index corresponding to the air conditioning state in the passenger compartment.

  Next, a method for determining the control amount will be described. First, a control map of basic seat air conditioning control in the AUTO mode shown in FIG. 7 will be described. In FIG. 7, the horizontal axis is the target sheet surface temperature index IST, and is divided into a first region having a low value, a second region having an intermediate value greater than the first region, and a third region having a value greater than the second region. Is shown. In FIG. 7, IST is represented as a numerical value of −30 to 130.

  In FIG. 7, the vertical axis indicates the relative value of the output of the sheet cooling means and the sheet heating means as 0 to 100 (%). In the drawing, the control characteristic of the output of the Peltier elements 4a and 4b in the sheet cooling means is indicated by PL, and the control characteristic of the output of the sheet blower 2 is indicated by FN. Further, the control characteristics of the outputs of the sheet heaters 7a and 7b, which are sheet heating means, are indicated by SH.

  The control characteristic of the sheet cooling means is that when the target sheet surface temperature index IST is equal to or less than the first value a on the minimum value side of the first region, the sheet cooling capacity of the sheet air conditioner 1 needs to be maximized, and the Peltier element 4a 4b and the sheet blower 2 are both set to the maximum output (100%).

  When the target sheet surface temperature index IST exceeds the first value a, the outputs of the Peltier elements 4a and 4b are decreased from the maximum output while keeping the output of the sheet blower 2 at the maximum output (100%). Then, the output of the sheet blower 2 is set to the maximum output in the region where the target sheet surface temperature index increases to the second value b, and the output of the sheet blower 2 is decreased from the maximum output in the region of the second value b or more. .

  That is, when the target sheet surface temperature index is a value in the range between the first value a and the second value b in the first region, it is not necessary to maximize the sheet cooling capacity of the sheet air conditioner 1. First, the output of the Peltier elements 4a and 4b, that is, the electric heating elements, that is, the cooling capacity is lowered (the cooling temperature is raised) to obtain the effect of power saving and energy saving without reducing the output of 2 (maintaining the maximum output). be able to.

  In the range where the target sheet surface temperature index is from the second value b to the third value c that is the value on the maximum value side of the first region, the outputs (cooling capacity) of the Peltier elements 4a and 4b are also the outputs of the sheet blower 2. (Blowing rate) is also reduced. In the range between the second value b and the third value c, the blower 14 of the vehicle interior air conditioner 120 according to the target blowing temperature TAO corresponding to the IST in response to the increase in the target seat surface temperature index IST. Therefore, the blowing level of any of the blowers 14 and 2 is also lowered at the same time. In other words, since any one of the air blowing levels is lowered without protruding, a favorable effect can be obtained in terms of noise countermeasures.

  It should be noted that the characteristic of lowering the cooling capacity of the sheet cooling means in the range of the target sheet surface temperature index may be other than a straight line having a linear function as shown in FIG.

  When the target sheet surface temperature index reaches the third value c, the operation of the Peltier elements 4a and 4b is stopped (output = 0%) while keeping the output of the sheet blower 2 constant. This state is continued until the target sheet surface temperature index reaches the fourth value d that is the maximum value of the first region. When the target sheet surface temperature index is the fourth value d, the operation of the sheet blower 2 is stopped (output = 0%). In the first embodiment, the blower level of the sheet blower 2 is constant in the range between the third value c and the fourth value d.

  In the range where the target seat surface temperature index is between the third value c and the fourth value d, the surface temperature of the seat 100 reaches the comfortable temperature zone (35 to 38 ° C.) only by the air blow by the seat blower 2. Assuming that it can be done, by stopping the operation of the Peltier elements 4a and 4b, it is possible to obtain a seat air conditioning feeling suitable for the thermal sensation of the seated person, and to obtain the effects of power saving and energy saving.

  The above is the control characteristics of the seat air conditioner 1 in the first area where the target sheet surface temperature index IST is a relatively low value, that is, the control characteristics of the Peltier elements 4a and 4b as the sheet cooling means and the sheet blower 2. is there. Note that in the first region, the sheet heating means is in an inoperative state.

  In the range of the second region where the target sheet surface temperature index IST is larger than the fourth value d (between the fourth value d and the fifth value e (> d)), the Peltier elements 4a and 4b and the sheet blower 2 While the operation of the (sheet cooling means) is stopped, the operation of the seat heaters 7a and 7b (sheet heating means) is also maintained in the stopped state.

  That is, in this second region, it is considered that the seat surface temperature can be maintained in a comfortable temperature zone only by the vehicle interior air conditioner 120, and all operations of the seat air conditioner 1 are stopped, so that the seat can be used in an intermediate period such as spring and autumn. The air-conditioning apparatus 1 does not needlessly intervene to deteriorate the air-conditioning feeling, and the seat air-conditioning control without any uncomfortable feeling can be achieved. Moreover, since the seat air conditioner 1 is set to the stop state, an effect of power saving can be obtained.

  In the third region where the target sheet surface temperature index IST is equal to or greater than the fifth value e, the sheet heating unit is operated to heat the sheet surface while the operation of the sheet cooling unit is stopped. That is, first, the sheet heaters 7a and 7b, which are sheet heating means that are in a stopped state with IST <e, are operated at IST = e. At this time, the output of the seat heaters 7a and 7b (target temperature Toh during heating) is set to a lower limit value.

  This lower limit is the lower limit temperature (Tmin≈30 ° C) as the minimum target temperature required to maintain a comfortable temperature zone in the middle period such as spring and autumn when a little cold is sensitive. In the range where the temperature index is between the fifth value e and the sixth value f (e ≦ IST ≦ f), the outputs of the seat heaters 7a and 7b are maintained at the lower limit value (Tmin).

  In the range where the target sheet surface temperature index IST is between the sixth value f and the eighth value h (f <IST <h), the output of the sheet heaters 7a and 7b according to the increase of the target sheet surface temperature index IST. Increase. Note that the rate of increase of the output (target temperature) of the heat generating portion (sheet heaters 7a and 7b) with respect to the increase in the target sheet surface temperature index IST is set to be small. That is, when the target sheet surface temperature index IST is a relatively low value close to the sixth value f, the rate of increase in the output of the heat generating portion is increased. In other words, the target sheet surface temperature index IST approaches the sixth value f. Thus, the reduction rate of the output of the heat generating portion is increased.

  As a result, as the surface temperature of the heated seat approaches the temperature at which it feels comfortable for the occupant, the target temperature of the heat generating part is set lower, and as a lower temperature adjustment in the surface temperature range where the thermal sensation becomes sensitive You can get a comfortable air conditioning feeling.

  In addition, as shown in FIG. 7, as a characteristic of reducing the increase rate of the output of the heat generating portion in accordance with the increase in the target sheet surface temperature index IST in the third region, the sixth value f and the eighth value h In a seventh value g (f <g <h) that is an intermediate value, an inflection point where the increase rate changes can be provided. Alternatively, the interval between the sixth value f and the eighth value h may be set by a function such as a parabola in which the increase rate gradually decreases, as indicated by a broken line SH ′ in FIG.

  In the third region, in the range where the target sheet surface temperature index IST is larger than the eighth value h (IST ≧ h), the output of the heating section (sheet heaters 7a and 7b) of the sheet heating means is set to the maximum output (100%). maintain. In the seat heaters 7a and 7b, the maximum output of the heat generating portion is set so that the target temperature Toh is a temperature upper limit temperature (Tmax≈42 ° C.) that is an upper limit value that does not cause an abnormal temperature feeling (such as a feeling of overheating). it can.

  As described above, according to the first embodiment, a comfortable seat air-conditioning feeling adapted to a sense of warmth in all seasons of summer or winter can be obtained even if a seat occupant does not perform frequent switch operations for setting changes. Obtainable.

(Second Embodiment)
Next, a second embodiment will be described. In the second embodiment, when a setting change dial 111 of the seat air conditioning operation switch 11 is operated by a seated person and a temperature correction value Δts is given, the seat air conditioning control characteristics are corrected according to the temperature correction value Δts. .

  That is, based on the basic sheet air-conditioning control in the first embodiment, the target sheet surface temperature index IST is corrected so as to be increased or decreased by the temperature correction value Δts. Note that the second embodiment is different from the first embodiment only in the correction of the target sheet surface temperature index IST, and the other components are all the same, so the description of the same components will be omitted.

  FIG. 8 shows control characteristics obtained by correcting the target sheet surface temperature index IST. The example of FIG. 8 shows a case where the setting change dial 111 is set to “warming: Δts = + 1”. In the figure, the dotted lines PL, FN, and SH indicate the correction value Δts = 0, that is, the control characteristics in the basic seat air-conditioning control similar to FIG. In FIG. 8, the output of the seat heating means indicates the target temperature Toh of the seat heater, and the maximum temperature (100%) is the temperature upper limit temperature Tmax (= 42 ° C.).

  In the second embodiment, an example in which the target sheet surface temperature index IST is corrected by +16 by the temperature correction value Δts = + 1 is shown, and each corrected control characteristic diagram is shown on the negative side of the target sheet surface temperature index IST ( It can be expressed as 16 parallel translations (left and right in the figure) (respectively diagrams PL1, FN1, and SH1). Note that the first to eighth values a to h are also translated from a 1 to h 1 in FIG.

  Further, the temperature correction value Δts = −3 (cool) can be expressed as 16 × 3 = 48 parallel movement to the positive side (right side in the figure) of the target sheet surface temperature index IST.

  The correction amount of the target sheet surface temperature index IST per temperature correction value Δts = + 1 may be a value other than the above-described +16, and can be set as appropriate for each vehicle.

  From FIG. 8, for example, when the temperature correction value Δts = + 1 (warming) at the fifth value e that is the upper limit value of the second region in which the seat heaters 7a and 7b are not operated before correction (Δts = 0). The seat heater target temperature Toh is set to about 35 ° C., thereby satisfying the requirement of warming the seat.

  Similarly, before the correction (Δts = 0), for example, the temperature correction value Δts = + 1 (warming) at the first value a in the first region where the Peltier elements 4a and 4b are to be set to the maximum output (100%). In this case, the output (cooling capacity) of the Peltier elements 4a and 4b is set to be reduced to about 70% (cooling temperature is increased), thereby satisfying the demand for warming the seat.

  The shape of the control characteristic diagram of the basic seat air-conditioning control does not change even when the seat air-conditioning control correction by the temperature correction value Δts is performed, so that the temperature of the seated person in all seasons from summer to winter is the same as in the first embodiment. The effect of being able to obtain a comfortable air-conditioning feeling adapted to the feeling can be obtained in the same way, and moreover, it can be adapted to the further demands of the seated person or different warmth feelings of different seated persons A seat air conditioning feeling can be obtained.

(Third embodiment)
Next, a third embodiment will be described. In the third embodiment, based on the basic seat air-conditioning control in the first embodiment, the seat heaters 7a and 7b, which are the heat generating portions of the sheet heating means, according to the read outside air temperature signal Tam from the outside air temperature sensor 21b. The target temperature Toh is corrected. The third embodiment is different from the first embodiment only in the correction of the target temperature Toh, and the other components are all the same, so the description of the same components will be omitted.

  FIG. 9 shows seat air conditioning control characteristics in the third embodiment. In FIG. 9, the horizontal axis represents the target sheet surface temperature index IST when there is no correction by the temperature correction value Δts (Δts = 0), as in the first embodiment.

  The vertical axis shows the target temperature Toh for the seat heater diagram SH as in the second embodiment (FIG. 8), but the Peltier element diagram PL and the seat blower diagram FN. Indicates the duty ratio during driving. Accordingly, in the example of FIG. 9, the maximum output (100%) of the Peltier elements 4a and 4b is set to a drive duty ratio of 80%, and the maximum output (100%) of the seat blower 2 is set to a drive duty ratio of 70%. It has been shown.

  In the third embodiment, when the outside air temperature Tam rises by 10 ° C., the seat heater diagram SH is lowered by 1 ° C. (SH2), or when the outside air temperature Tam falls by 10 ° C., the seat heater diagram SH rises by 1 ° C. (SH3) is corrected.

  That is, in the control routine of FIG. 6 described above, the basic seat air conditioning control characteristics SH, PL, and FN are set immediately after the seat air conditioning operation switch 11 is turned on (AUTO mode is started). From this state, every time the outside air temperature Tam decreases (increases) by 1 ° C., the target temperature Toh of the seat heater is corrected to increase (decrease) by 0.1 ° C.

  Thus, the seat heaters 4a and 4b can be used even when the temperature of the seated person changes due to a decrease (or increase) in the outside air temperature Tam, and there is a request to warm the seat air conditioning (or decrease the feeling of heating). The target temperature Toh is corrected to increase (or decrease), so that a comfortable seat air-conditioning feeling adapted to the changing sensation of the occupant can be obtained without requiring the occupant to frequently switch.

  Note that the upper limit of temperature sensation Tmax = 42 ° C. and the lower limit of temperature sensation Tmin = 30 ° C. are unchanged, and therefore, as shown in FIG. At the time of correction of decrease in Toh, Tmin is limited as a lower limit value so as to match the warmth of the seated person.

(Other embodiments)
(1) In each of the above embodiments, the target air temperature TAO in the vehicle interior air conditioner 120 is calculated for the entire vehicle interior, the target seat surface temperature index IST based on the same target air temperature TAO for each seat, and the same seat air conditioner. The example which performs sheet | seat air conditioning of each sheet | seat using the control characteristic was shown. However, the present invention is not limited to this, and different sheet air conditioning control characteristics may be set for each sheet with respect to the same target sheet surface temperature index IST.

  (2) In each of the above embodiments, the target air temperature TAO in the vehicle interior air conditioner 120 is calculated for the entire vehicle interior, and the seat air conditioning is performed using the same target air temperature TAO and the target seat surface temperature index IST for each seat. An example to do. However, the present invention is not limited to this, and the vehicle interior is divided into a plurality of air-conditioning zones, for example, two air-conditioning zones for the front seat and the rear seat, or four air-conditioning zones for the front seat left and right and the rear seat left and right. A vehicle interior air conditioner that calculates a target air temperature for each air conditioning zone and independently controls air conditioning for each air conditioning zone according to the target air temperature TAOi (i: subscript indicating the air conditioning zone) for each air conditioning zone. The seat air conditioner of the present invention can be applied.

  In this case, for each sheet in the identified air conditioning zone, the target sheet surface temperature index ISTi is calculated based on the target blowing temperature TAOi, and the sheet air conditioning control corresponding to the target sheet surface temperature index ISTi that is different for each sheet is performed. By doing so, it is possible to obtain a comfortable seat air conditioning feeling that is more finely adapted to the warmth of the seated person.

  (3) In each of the above embodiments, the sheet cooling means is configured by the Peltier elements 4a, 4b and the sheet blower 2, and the heat generating portion of the sheet heating means is configured by the sheet heater. However, the present invention is not limited thereto. Other cooling devices and heating devices (heating units) may be used. For example, one that cools and heats by a refrigeration cycle, one that uses a PCT heater as a heat generating part, or a heating action by a Peltier element may be used.

It is a figure showing a schematic structure of a sheet air-conditioning device of an embodiment of the present invention. It is a figure which shows the whole structure of the electric control part of embodiment. It is a figure which shows the control characteristic of the blower voltage of a vehicle interior air conditioner. It is a figure which shows the control characteristic of the blower outlet mode of a vehicle interior air conditioner. It is a figure which shows the structure of a seat air conditioning operation switch. It is a flowchart which shows a seat air-conditioning control routine. It is a control map which shows a basic seat air-conditioning control characteristic. It is a control map which shows the sheet air-conditioning control characteristic of a 2nd embodiment. It is a control map which shows the sheet air-conditioning control characteristic of a 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Seat air conditioner, 2 ... Sheet blower, 3a, 3b ... Duct,
4a, 4b ... electric heating elements (Peltier elements), 7a, 7b ... sheet heaters,
8: Seat air conditioning ECU, 11: Seat air conditioning operation switch.

Claims (18)

An air conditioner (1) for a seat (1a) disposed in a vehicle interior that is air-conditioned by a vehicle interior air conditioner (120) that operates under an operating condition corresponding to a target outlet temperature (TAO),
Sheet cooling means (2, 4a, 4b) for cooling the surface of the sheet;
Sheet heating means (7a, 7b) for heating the surface of the sheet;
Sheet air conditioning control means (8) for controlling the sheet cooling means and the sheet heating means according to a target sheet surface temperature index (IST),
The target blowing temperature is calculated according to at least a target temperature (Tset) in the vehicle interior,
The seat air-conditioning control means calculates the target seat surface temperature index as a monotonically increasing function according to an increase in the target blowing temperature, and the target seat surface temperature index is a value of the first region that is relatively low. Activates the sheet cooling means, and activates the sheet heating means when the target sheet surface temperature index is a relatively high value in the third region, and the target sheet surface temperature index is greater than the value in the first region. The vehicle seat air conditioner characterized in that when the value of the second region is higher than the value of the third region, the operation of the sheet cooling means and the sheet heating means is stopped. An air conditioner (1) for a seat (1a) disposed in a vehicle interior that is air-conditioned by a vehicle interior air conditioner (120) that operates under an operating condition corresponding to a target outlet temperature (TAO),
Sheet cooling means (2, 4a, 4b) for cooling the surface of the sheet;
Sheet air conditioning control means (8) for controlling the sheet cooling means according to a target sheet surface temperature index (IST),
The target blowing temperature is calculated according to at least a target temperature (Tset) in the passenger compartment,
The seat air-conditioning control means calculates the target seat surface temperature index as a monotonically increasing function according to an increase in the target blowing temperature, and the target seat surface temperature index is a value of the first region that is relatively low. Operates the seat cooling means, and stops the operation of the seat cooling means when the target seat surface temperature index is a value of the second region higher than the value of the first region. Air conditioner. The vehicle seat air conditioner according to claim 1 or 2, wherein the seat cooling means is controlled such that the cooling capacity decreases in accordance with an increase in the target seat surface temperature index. The said sheet cooling means is equipped with the electrothermal element (4a, 4b) for cooling, and the sheet | seat blower (2) which ventilates the air cooled by the said electrothermal element to the surface of the said sheet | seat. The vehicle seat air conditioner described in 1. The sheet cooling means drives the electric heating element and the sheet blower with maximum capacity when the target sheet surface temperature index is the first value (a, a1) on the minimum value side in the first region, and the target Driving at a second value (b, b1) in which the sheet surface temperature index is larger than the first value, while maintaining the maximum capacity of the sheet blower, the electric heating element is driven so as to decrease from the maximum capacity. The vehicular seat air-conditioning apparatus according to claim 4. The sheet cooling means stops driving the heating element while maintaining the driving of the sheet blower when the target sheet surface temperature index is the third value (c, c1) on the maximum value side in the first region. When the target sheet surface temperature index is in the range of the fourth value (d, d1) that is larger than the third value than the third value, the driving of the electrothermal element is stopped and the sheet is stopped. 6. The vehicle seat air conditioner according to claim 4, wherein the driving of the air blower is maintained and the electric heating element and the seat air blower are deactivated when in a range exceeding the fourth value. An air conditioner (1) for a seat (1a) disposed in a vehicle interior that is air-conditioned by a vehicle interior air conditioner (120) that operates under an operating condition corresponding to a target outlet temperature (TAO),
Sheet heating means (7a, 7b) for heating the surface of the sheet;
Sheet air conditioning control means (8) for controlling the sheet heating means according to a target sheet surface temperature index (IST),
The target blowing temperature is calculated according to at least a target temperature (Tset) in the passenger compartment,
The seat air-conditioning control means calculates the target seat surface temperature index as a monotonically increasing function according to an increase in the target outlet temperature, and the target seat surface temperature index is a value of a third region that is relatively high Operates the sheet heating means, and stops the operation of the sheet heating means when the target sheet surface temperature index is a value of the second region lower than the value of the third region. Seat air conditioner. The vehicle seat air conditioner according to claim 1 or 7, wherein the seat heating means is controlled such that the heating capacity increases in accordance with an increase in the target seat surface temperature index. The sheet heating means is stopped when the target sheet surface temperature index becomes a value in a region smaller than a fifth value (e, e1) on the minimum value side in the third region. The vehicle seat air conditioner according to claim 8. The sheet heating means includes a heat generating part (7a, 7b),
The seat air-conditioning control means sets a target temperature (Toh) according to the sheet surface temperature index, and the temperature of the heat generating portion is adjusted to be the target temperature that rises as the heating capacity increases. The vehicle seat air conditioner according to claim 9. When the target sheet surface temperature index is within a range from the fifth value to a sixth value (f, f1, f2) greater than the fifth value, the seat air conditioning control means The vehicle seat air conditioner according to claim 10, wherein the target temperature is set to be a temperature sensation lower limit temperature (Tmin). The seat air-conditioning control means sets the target temperature of the heat generating portion to a warmth upper limit when the target sheet surface temperature index is in a range exceeding an eighth value (h, h1, h3) greater than the sixth value. It sets so that it may be maintained at temperature (Tmax), The vehicle seat air conditioner of Claim 11 characterized by the above-mentioned. The seat air conditioning control means is set so that the rate of increase of the target temperature of the heat generating portion decreases as the target sheet surface temperature index increases in the range from the sixth value to the eighth value. The vehicular seat air-conditioning apparatus according to claim 12. An outside air temperature sensor (21b) for detecting an air temperature outside the passenger compartment,
The seat air-conditioning control unit is set to increase the target temperature of the heat generating unit according to a decrease in the detected outside air temperature (Tam). The vehicle seat air-conditioning apparatus described. The vehicle seat air-conditioning apparatus according to claim 14, wherein the seat air-conditioning control means is provided with an upper limit value (Tmax) for an increase in the target temperature of the heat generating portion. The seat air-conditioning control means lowers the target temperature of the heat generating part in accordance with a decrease in the detected outside air temperature, and provides a lower limit (Tmin) for the decrease in the target temperature. The vehicle seat air conditioner according to claim 14 or 15. The vehicular seat air conditioner according to any one of claims 9 to 16, wherein the heat generating portion is configured by a seat heater (7a, 7b) embedded in the vicinity of the surface of the seat. A seat temperature setting unit (111) for setting a temperature correction value (Δts) desired by the seat occupant;
The vehicle seat air-conditioning apparatus according to any one of claims 1 to 17, wherein the seat air-conditioning control unit corrects the target seat surface temperature index to increase or decrease in accordance with the temperature correction value.

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