JP5039360B2 - Seat cooling system for vehicle seat - Google Patents

Description

  The present invention relates to a seat surface cooling device that cools a seat surface on a front surface side of a vehicle seat including a seat cushion and a seat back.

As a conventional device for cooling a vehicle seat, heat generated by a heat source having a cooling or heating function is transferred to a temperature-adjusted portion serving as a seat surface through a heat conduction portion, and is blown from a blower. It has been known that a sheet surface is cooled by blowing cold / warm air from a large number of blowing holes formed on the entire surface of the temperature controlled portion through a convection portion (for example, Patent Document 1).
JP 2003-42590 A

  However, in such a conventional sheet surface cooling device, since the heat of one heat source is transferred to the temperature controlled part via the heat conduction part, the temperature of the heat conduction part is close to the heat source. Since the degree of cooling is lower at a portion that is further cooled and far from the heat source, there is a problem that temperature unevenness occurs in the temperature-adjusted portion, that is, the sheet surface.

  In addition, even when the cool air of the blower is blown out from the blowout holes of the temperature controlled portion to cool and heat the seat surface, the amount of air blown from the blowout holes is changed by the blowout holes depending on the direction of the wind blown from the blower. Therefore, there is still a problem that temperature unevenness occurs on the sheet surface.

  Accordingly, an object of the present invention is to provide a seat surface cooling device for a vehicle seat that can suppress the occurrence of temperature unevenness on the seat surface to be cooled and can more efficiently cool the seat surface.

In the invention according to claim 1, the interior of the seat embedded in the seat surface (2a, 3a) on the surface side of the vehicle seat (1) comprising the seat cushion (2) and the seat back (3). A heat exchanger (11), an out-of-seat heat exchanger (12) disposed on the back side of the vehicle seat (1), the in-seat heat exchanger (11), and the out-of-seat heat exchanger (12 ) Medium circulation means (13) for circulating the heat exchange medium between them, initial operation means (20) for starting the operation of the medium circulation means (13), and the medium in the in-seat heat exchanger (11) An operation stop control means (23) for controlling the stop timing of the medium circulation means (13) based on at least one of the following temperature change and the temperature change of the medium in the outside-seat heat exchanger (12). the provided, the operation stop control The step (23) is based on at least one of the temperature change of the medium in the heat exchanger (11) in the sheet and the temperature change of the medium in the heat exchanger (12) outside the sheet. A stop signal is output to the medium circulation means (13) when it is determined that the heat exchange medium of the inner heat exchanger (11) is substantially replaced with the heat exchange medium of the outer heat exchanger (12). And

In the invention according to claim 2, the interior of the seat embedded in the seat surface (2a, 3a) on the surface side of the vehicle seat (1) comprising the seat cushion (2) and the seat back (3). A heat exchanger (11), an out-of-seat heat exchanger (12) disposed on the back side of the vehicle seat (1), the in-seat heat exchanger (11), and the out-of-seat heat exchanger (12 ) Medium circulation means (13) for circulating the heat exchange medium between them, initial operation means (20) for starting the operation of the medium circulation means (13), and the medium in the in-seat heat exchanger (11) An operation stop control means (23) for controlling the stop timing of the medium circulation means (13) based on at least one of the following temperature change and the temperature change of the medium in the outside-seat heat exchanger (12). the provided, the operation stop control The step (23) is based on at least one of the temperature change of the medium in the heat exchanger (11) in the sheet and the temperature change of the medium in the heat exchanger (12) outside the sheet. When it is determined that the replacement of the heat exchange medium of the inner heat exchanger (11) and the heat exchange medium of the outer sheet heat exchanger (12) has started, and when it is determined that the temperature change has passed the peak temperature. A stop signal is output to the medium circulating means (13).

In the invention according to claim 3 , in the seat embedded in the seat surface (2a, 3a) on the surface side of the vehicle seat (1) comprising the seat cushion (2) and the seat back (3). A heat exchanger (11), an out-of-seat heat exchanger (12) disposed on the back side of the vehicle seat (1), the in-seat heat exchanger (11), and the out-of-seat heat exchanger (12 ) Medium circulation means (13) for circulating the heat exchange medium between them, initial operation means (20) for starting the operation of the medium circulation means (13), and the medium in the in-seat heat exchanger (11) An operation stop control means (23) for controlling the stop timing of the medium circulation means (13) based on at least one of the following temperature change and the temperature change of the medium in the outside-seat heat exchanger (12). the provided, the operation stop control The stage (23) is based on both the temperature change of the medium in the in-seat heat exchanger (11) and the temperature change of the medium in the out-of-seat heat exchanger (12). A stop signal is output to the medium circulation means (13) when it is determined that the heat exchange medium of (11) is substantially replaced with the heat exchange medium of the out-of-seat heat exchanger (12).

In the invention concerning Claim 4 , in the seat embed | buried inside the seat surface (2a, 3a) used as the surface side of the vehicle seat (1) which consists of a seat cushion (2) and a seat back (3) A heat exchanger (11), an out-of-seat heat exchanger (12) disposed on the back side of the vehicle seat (1), the in-seat heat exchanger (11), and the out-of-seat heat exchanger (12 ) Medium circulation means (13) for circulating the heat exchange medium between them, initial operation means (20) for starting the operation of the medium circulation means (13), and the medium in the in-seat heat exchanger (11) An operation stop control means (23) for controlling the stop timing of the medium circulation means (13) based on at least one of the following temperature change and the temperature change of the medium in the outside-seat heat exchanger (12). the provided, the operation stop control The stage (23) is based on both the temperature change of the medium in the in-seat heat exchanger (11) and the temperature change of the medium in the out-of-seat heat exchanger (12). 11) After determining that the replacement of the heat exchange medium of the heat exchanger medium of the outside heat exchanger (12) with the heat exchanger medium of the sheet outer heat exchanger (12) has been started, the medium circulation means ( 13), a stop signal is output.

In the invention according to claim 5 , the outside-sheet heat exchanger side sensor (21) that detects the medium temperature in the outside-sheet heat exchanger (12) at an appropriate portion of the outside-sheet heat exchanger (12). ), And the outside sheet heat exchanger side sensor (21) is arranged at a medium outlet portion of the outside sheet heat exchanger (12).

In the invention according to claim 6 , the in-seat heat exchanger side sensor (22) for detecting the medium temperature in the in-seat heat exchanger (11) at an appropriate part of the in-seat heat exchanger (11). ), And the in-seat heat exchanger side sensor (22) is arranged at a medium outlet portion of the in-seat heat exchanger (11).

In the invention according to claim 7 , the outside-seat heat exchanger side sensor (21) for detecting the medium temperature in the outside-sheet heat exchanger (12) at an appropriate part of the outside-sheet heat exchanger (12). ), And the outside-seat heat exchanger side sensor (21) is arranged at a medium inlet portion of the outside-seat heat exchanger (12).

In the invention according to claim 8 , the in-seat heat exchanger side sensor (22) for detecting the medium temperature in the in-seat heat exchanger (11) at an appropriate part of the in-seat heat exchanger (11). ), And the in-seat heat exchanger side sensor (22) is arranged at a medium inlet portion of the in-seat heat exchanger (11).

In the invention according to claim 9 , the operation stop control means (23) adds the detection value of the thermal load detection means (24) for detecting the thermal load state of the vehicle body according to room temperature, outside air temperature, solar radiation amount, etc. The stop timing of the medium circulating means (13) is controlled.

In the invention concerning Claim 10 , the said operation stop control means (23) adds the detected value of the operating condition of an air conditioner, and controls the stop timing of the said medium circulation means (13). And

  According to the first aspect of the present invention, when the vehicle seat is parked under the hot summer sun and the direct sunlight is applied to the vehicle seat, the seat surface on the surface side of the vehicle seat is heated. In this case, since the heat exchanger outside the seat disposed on the back side of the vehicle seat is in a state avoiding direct sunlight, the heat exchange medium in the heat exchanger outside the seat is the seat surface, that is, the heat inside the seat. The temperature is lower than that of the exchanger.

  Then, when the medium circulation means is operated by the initial operation means in such a parking state, the heat exchange medium is circulated between the heat exchanger outside the seat and the heat exchanger inside the seat, When the heat exchange medium in a low temperature state is supplied to the in-seat heat exchanger, the in-seat heat exchanger can be cooled, and consequently, the sheet surface can be uniformly cooled by the heat exchange medium.

  Further, after the heat exchange medium is circulated in this manner, based on at least one of the temperature change of the medium in the in-seat heat exchanger and the temperature change of the medium in the out-of-sheet heat exchanger, The stop timing of the medium circulation means is controlled by the operation stop control means.

  Therefore, since the medium circulation means can be stopped when the heat exchange medium in the out-of-seat heat exchanger in the low temperature state is supplied to the in-seat heat exchanger, the time when the in-seat heat exchanger is cooled most Thus, the circulation of the heat exchange medium can be stopped, and as a result, the cooling efficiency of the seat surface can be improved.

Further, based on at least one of the temperature change of the medium in the in-seat heat exchanger and the temperature change of the medium in the out-of-seat heat exchanger, the heat exchange medium and the outside of the sheet in the in-seat heat exchanger Since the replacement of the heat exchanger with the heat exchange medium can be determined, either the sensor outside the seat heat exchanger or the sensor inside the seat heat exchanger may be used. A sheet can be obtained.

According to a second aspect of the present invention, the operation stop control means is at least one of a temperature change of the medium in the in-seat heat exchanger and a temperature change of the medium in the out-of-seat heat exchanger. On the basis of the heat exchange medium of the heat exchanger in the seat and the heat exchange medium of the heat exchanger outside the seat, and then determine the peak temperature at which the temperature change changes, and pass the peak temperature. Since the medium circulation means can be stopped at that time, the replacement of the heat exchange medium of the in-seat heat exchanger and the heat exchange medium of the out-of-seat heat exchanger can be determined more accurately, so that the cooling effect of the seat surface can be reduced. Can be increased.

According to the invention of claim 3 , based on both the temperature change of the medium in the heat exchanger in the sheet and the temperature change of the medium in the heat exchanger outside the sheet, the heat exchange medium of the heat exchanger in the seat It is possible to determine the replacement of the heat exchange medium between the heat exchanger outside the seat and the heat exchange medium of the heat exchanger outside the seat and more accurately determine the replacement between the heat exchange medium of the heat exchanger inside the seat and the heat exchange medium of the heat exchanger outside the seat. The cooling effect of the sheet surface can be further enhanced.

According to the invention of claim 4 , based on both the temperature change of the medium in the in-seat heat exchanger and the temperature change of the medium in the out-of-sheet heat exchanger, the heat exchange medium of the in-sheet heat exchanger And the heat exchange medium of the heat exchanger outside the seat is determined to be replaced, and then the peak temperature at which the temperature change changes is determined, and the medium circulating means is stopped when the peak temperature is passed. Since the replacement of the heat exchange medium of the in-seat heat exchanger and the heat exchange medium of the outside sheet heat exchanger can be more accurately determined by two temperature changes, the cooling effect on the seat surface can be further enhanced.

According to the fifth aspect of the present invention, since the outside seat heat exchanger side sensor is arranged at the medium outlet portion of the outside seat heat exchanger, when the outside seat heat exchanger side sensor is used, the inside seat heat It is possible to more accurately determine the replacement of the heat exchange medium of the exchanger and the heat exchange medium of the out-of-seat heat exchanger.

According to the sixth aspect of the invention, since the in-seat heat exchanger side sensor is disposed at the medium outlet portion of the in-seat heat exchanger, when the in-seat heat exchanger side sensor is used, the in-seat heat It is possible to more accurately determine the replacement of the heat exchange medium of the exchanger and the heat exchange medium of the out-of-seat heat exchanger.

According to the seventh aspect of the invention, since the outside seat heat exchanger side sensor is arranged at the medium inlet portion of the outside seat heat exchanger, when the stop timing of the medium circulating means is judged from the peak temperature of the temperature change. The replacement of the heat exchange medium of the in-seat heat exchanger and the heat exchange medium of the outside-sheet heat exchanger can be determined more accurately.

According to the eighth aspect of the present invention, since the in-seat heat exchanger side sensor is disposed at the medium inlet portion of the in-seat heat exchanger, when the stop timing of the medium circulating means is determined from the peak temperature of the temperature change. The replacement of the heat exchange medium of the in-seat heat exchanger and the heat exchange medium of the outside-sheet heat exchanger can be determined more accurately.

According to the invention of claim 9 , since the operation stop control means adds the detection value of the thermal load detection means to control the stop timing of the medium circulation means, the room temperature, the outside air temperature, the amount of solar radiation, etc. The stop timing of the medium circulating means can be controlled more finely according to the above.

According to the invention of claim 10 , since the operation stop control means adds the detected value of the operating status of the air conditioner to control the stop timing of the medium circulation means, the control state of the air conditioner Accordingly, the stop timing of the medium circulating means can be controlled more finely.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a seat surface cooling and heating apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

  (First Embodiment) FIG. 1 is a side sectional view of a vehicle seat equipped with a seat surface cooling device according to this embodiment, FIG. 2 is a schematic configuration diagram showing the seat surface cooling device in an expanded state, and FIG. FIG. 4 is a control block diagram of the seat surface cooling device, and FIG. 4 is an explanatory diagram showing a flowchart for controlling the seat surface cooling device.

  As shown in FIG. 1, a vehicle seat 1 to which a seat surface cooling device 10 according to the present embodiment is applied includes a seat cushion 2, a seat back 3, and a headrest 4, and the seat cushion 2 is a support leg. (For example, a slide device) 5 is installed on the vehicle body floor 6.

  Further, in the vehicle seat 1, the upper surface that is the front surface side of the seat cushion 2 and the front surface that is the front surface side of the seat back 3 are the seat surfaces 2 a and 3 a.

  As shown in FIG. 2, the seat surface cooling device 10 includes an in-seat heat exchanger 11 embedded in the seat surface 2 a of the seat cushion 2 and the seat surface 3 a of the seat back 3, and the rear surface of the vehicle seat 1. An outside seat heat exchanger 12 disposed on the lower surface 2b side of the seat cushion 2 and a medium circulation means 13 for circulating a heat exchange medium between the inside seat heat exchanger 11 and the outside seat heat exchanger 12; , And is configured.

  Then, the medium circulating means 13 is operated to supply the low temperature medium of the out-of-seat heat exchanger 12 to the in-seat heat exchanger 11, so that the heat exchange medium in the in-seat heat exchanger 11 is converted to the out-of-seat heat exchanger 12. The sheet surfaces 2a and 3a can be cooled by replacing the low temperature medium.

  Further, as shown in FIG. 1, the in-seat heat exchanger 11 includes a seat cushion side heat exchanger 11 </ b> A provided in the seat cushion 2 and a seat back side heat exchanger 11 </ b> B provided in the seat back 3. The In FIG. 2, the seat cushion side heat exchanger 11 </ b> A and the seat back side heat exchanger 11 </ b> B are collectively shown as one in-seat heat exchanger 11 for convenience.

  The seat cushion side heat exchanger 11 </ b> A and the seat back side heat exchanger 11 </ b> B are formed by high-frequency welding two flexible sheets such as ether urethane while forming medium flow paths 11 </ b> Ap and 11 </ b> Bp therebetween. It is formed by joining.

  The outside seat heat exchanger 12 is provided only on the seat cushion 2 side, and the outside seat heat exchanger 12, the seat cushion side heat exchanger 11A, and the seat back side heat exchanger 11B (that is, the seat). The internal heat exchanger 11) is in communication with a seat cushion side circulation path 15 and a seat back side circulation path 16 for circulating a heat exchange medium such as engine coolant.

  The seat cushion side circulation path 15 includes an outward path 15a and a return path 15b communicating the seat outside heat exchanger 12 and the seat cushion side heat exchanger 11A, and the seat back side circulation path 16 includes the seat outside heat exchanger 12. And a return path 16b communicating with the seat back side heat exchanger 11B. The medium circulation means 13 is disposed in each of the return paths 15b and 16b.

  As shown in FIG. 2, the medium circulation means 13 includes an electric water pump 13a and a reservoir tank 13b arranged in series on the upstream side of the water pump 13a.

  Then, by operating the water pump 13a, the heat exchange medium in the seat cushion side heat exchanger 11A and the seat back side heat exchanger 11B is sucked through the reservoir tank 13b, and then the sucked heat exchange medium Is pumped to the heat exchanger 12 outside the seat. The heat exchange medium pumped to the outside seat heat exchanger 12 flows through the medium flow path 12p arranged in a bellows shape inside the outside seat heat exchanger 12, and then is distributed to the forward paths 15a and 16a to be seat cushion side It flows into the heat exchanger 11A and the seat back side heat exchanger 11B and circulates through the medium flow paths 11Ap and 11Bp arranged in the bellows shape of the seat cushion side heat exchanger 11A and the seat back side heat exchanger 11B. Then, it collects in the reservoir tank 13b.

  Then, by being sucked again from the reservoir tank 13b to the water pump 13a, the heat exchange medium is composed of the outside seat heat exchanger 12, the seat cushion side heat exchanger 11A, and the seat back side heat exchanger 11B. Circulated between.

  Here, in the seat surface cooling apparatus 10 of the present invention, as shown in FIG. 3, an ignition switch (IGN) 20 as an initial operation means for starting the operation of the medium circulation means 13, that is, the water pump 13a, and the heat outside the seat An outside-seat heat exchanger-side sensor 21 that detects a medium temperature in the exchanger 12 at an appropriate part of the outside-seat heat exchanger 12, and a medium temperature in the in-seat heat exchanger 11, the inside-seat heat exchanger In-seat heat exchanger side sensor 22 that is detected at 11 appropriate parts, and an operation stop control that controls the stop timing of the water pump 13a from the temperature change of the outside seat heat exchanger side sensor 21 or the in-seat heat exchanger side sensor 22 And a sheet cooling control circuit 23 as means.

  Then, the seat cooling control circuit 23 causes the heat exchange medium of the in-seat heat exchanger 11 to heat the outside of the seat by the temperature change of any one of the outside-seat heat exchanger side sensor 21 and the in-seat heat exchanger side sensor 22. A stop signal is output to the water pump 13a when it is determined that the heat exchange medium of the exchanger 12 is substantially replaced.

  As shown in FIG. 2, the outside seat heat exchanger side sensor 21 is a seat outside outlet sensor 21 </ b> A arranged at the medium outlet portion of the outside seat heat exchanger 12, and the inside seat heat exchanger side sensor 22 is The sheet inner outlet sensor 22 </ b> A is disposed at the medium outlet portion of the in-sheet heat exchanger 11.

Therefore, the determination that the heat exchange medium of the in-seat heat exchanger 11 is substantially replaced with the heat exchange medium of the out-of-seat heat exchanger 12 using the seat outer outlet sensor 21A or the seat inner outlet sensor 22A is shown in Table 1. It can be known from the temperature change shown.

  That is, in the case where the seat outside outlet sensor 21A is used, the determination of the replacement of the heat exchange medium between the in-seat heat exchanger 11 and the outside seat heat exchanger 12 is performed first as shown in Case 1 of Table 1, The initial temperature (temperature sensor initial value) Tstart of the outlet sensor 21A is measured, and the initial temperature Tstart is compared with the current temperature Tref after the operation of the water pump 13a. When Tstart <Tref is established. The replacement of the heat exchange medium can be determined.

  In addition, as shown in Case 2 in Table 1, the determination of whether to replace the heat exchange medium between the in-seat heat exchanger 11 and the outside-sheet heat exchanger 12 when using the seat inside outlet sensor 22A, The initial temperature (initial value of the temperature sensor) Ttart of the outlet sensor 22A is measured, and the initial temperature Tstart is compared with the current temperature Tref after the operation of the water pump 13a. When Tstart> Tref is satisfied. The replacement of the heat exchange medium can be determined.

  Therefore, the operation / stop control of the water pump 13a by the seat cooling control circuit 23 can be executed according to the flowchart shown in FIG. 4, and first, the ignition switch (IGN) 20 as the initial operation means is turned ON in step S1. After the initial temperature Tstart is read in step S2, the water pump 13a is operated in step S3, and the heat exchange medium is circulated between the in-seat heat exchanger 11 and the out-of-seat heat exchanger 12.

  Next, in step S4, the current temperature Tref is measured, and it is determined whether or not the current temperature Tref meets the conditions shown in Table 1 (case 1 or case 2). If the current temperature Tref is met, a signal for stopping the water pump 13a in step S5. Is output.

  With the seat surface cooling device according to the present embodiment configured as described above, when the vehicle is parked for a long time under the hot summer sun, the seat cushion 2 that becomes the surface side of the vehicle seat 1 due to the direct sunlight irradiated into the vehicle interior The seat surfaces 2a and 3a of the seat back 3 are heated. At this time, the rear surface side of the vehicle seat 1, that is, the lower surface 2b of the seat cushion 2 and the rear side surface of the seat back 3, in particular, the lower surface 2b of the seat cushion 2 in this embodiment is blocked by direct sunlight, The atmospheric temperature in the passenger compartment is substantially the same.

  For this reason, the seat outside heat exchanger 13 disposed on the lower surface 2b side of the seat cushion 2 is in a low temperature state substantially equal to the vehicle interior atmosphere temperature, while the seat cushion 2 and the seat back 3 on the seat surface 2a, 3a side. The seat cushion side heat exchanger 11 </ b> A and the seat back side heat exchanger 11 </ b> B arranged in the above are in a high temperature state.

  When the ignition switch 20 of the vehicle parked for a long time is turned on in this way, the water pump 13a of the medium circulating means 13 is operated accordingly, and the heat exchanger 12 outside the seat and the heat exchanger 11 inside the seat are connected. The heat exchange medium is circulated between them, and the heat exchange medium in the low temperature state of the out-of-seat heat exchanger 12 is supplied to the in-seat heat exchanger 11, thereby cooling the in-seat heat exchanger 11. The sheet surfaces 2a and 3a can be uniformly cooled by the heat exchange medium.

  In addition, after the heat exchange medium is circulated in this way, the outside sheet heat exchanger side sensor 21 that detects the medium temperature in the out-of-sheet heat exchanger 12 or the sheet temperature that detects the medium temperature in the in-sheet heat exchanger 11. The stop timing of the water pump 13 a is controlled by the seat cooling control circuit 23 from the temperature change of the internal heat exchanger side sensor 22.

  Therefore, since the water pump 13a can be stopped when the heat exchange medium in the outside-seat heat exchanger 12 in a low temperature state is supplied to the in-seat heat exchanger 11, the in-seat heat exchanger 11 is most cooled. At this point, the circulation of the heat exchange medium can be stopped, and as a result, the cooling efficiency of the sheet surfaces 2a and 3a can be improved.

  Further, the seat cooling control circuit 23 causes the heat exchange medium of the in-seat heat exchanger 11 to heat the outside of the seat by the temperature change of any one of the outside-seat heat exchanger side sensor 21 and the in-seat heat exchanger side sensor 22. When it is determined that the heat exchange medium of the exchanger 12 is almost replaced, a stop signal is output to the water pump 13a, so that either one of the outside heat exchanger side sensor 21 or the in-seat heat exchanger side sensor 22 is output. The configuration can be simplified, and an inexpensive vehicle seat can be provided.

  Furthermore, the seat outer heat exchanger side sensor 21 is a seat outer outlet sensor 21A arranged at the medium outlet portion of the seat outer heat exchanger 12, and the seat inner heat exchanger side sensor 22 is a seat inner heat. Since the seat inner outlet sensor 22A is disposed at the medium outlet portion of the exchanger 11, the replacement of the heat exchange medium of the in-seat heat exchanger 11 and the heat exchange medium of the outer seat heat exchanger 12 is more accurately determined. be able to.

  (Second Embodiment) FIG. 5 is an explanatory diagram showing a flowchart for controlling the seat surface cooling apparatus according to this embodiment. The seat surface cooling apparatus according to this embodiment includes the same components as those of the seat surface cooling apparatus according to the first embodiment. Therefore, the same components are denoted by common reference numerals, and redundant description is omitted.

  The seat surface cooling apparatus according to the present embodiment is basically configured in substantially the same manner as the seat surface cooling apparatus 10 of the first embodiment, and the water pump 13a is initially operated by an ignition switch (IGN) 20, and the seat The cooling control circuit 23 controls the stop timing of the water pump 13a.

  However, in the present embodiment, the seat cooling control circuit 23 changes the temperature of either the outside heat exchanger side sensor 21 or the inside seat heat exchanger side sensor 22 to change the heat exchange medium of the in-seat heat exchanger 11. When it is determined that the replacement of the heat exchange medium with the heat exchanger 12 outside the seat has started, a stop signal is output to the water pump 13a when it is determined that the temperature change has passed the peak temperature.

  As shown in FIG. 2, the outside seat heat exchanger side sensor 21 is a seat outside inlet sensor 21 </ b> B disposed at the medium inlet portion of the outside seat heat exchanger 12, and the inside seat heat exchanger side sensor 22 is , A sheet inner side inlet sensor 22 </ b> B disposed in the medium inlet portion of the in-sheet heat exchanger 11.

Therefore, the determination that the heat exchange medium of the in-seat heat exchanger 11 is substantially replaced with the heat exchange medium of the out-of-seat heat exchanger 12 using the seat outer inlet sensor 21B or the seat inner inlet sensor 22B is shown in Table 2. It can be known from the temperature change shown.

  That is, in the case where the seat outside inlet sensor 21B is used, the determination of the replacement of the heat exchange medium between the in-seat heat exchanger 11 and the outside seat heat exchanger 12 is performed first as shown in Case 3 in Table 2. The initial temperature (initial value of the temperature sensor) Tstart of the inlet sensor 21B is measured, and the initial temperature Tstart is compared with the current temperature Tref after the operation of the water pump 13a. When Tstart <Tref is satisfied. It can be determined that the replacement of the heat exchange medium has started.

  In addition, as shown in Case 4 of Table 2, the determination of whether to replace the heat exchange medium between the in-seat heat exchanger 11 and the out-of-seat heat exchanger 12 when using the seat inside inlet sensor 22B is performed first. The initial temperature (initial value of the temperature sensor) Ttart of the inlet sensor 22B is measured, and the initial temperature Tstart is compared with the current temperature Tref after the operation of the water pump 13a. When Tstart> Tref is satisfied. It can be determined that the replacement of the heat exchange medium has started.

Further, the determination that the temperature change of the outside seat heat exchanger side sensor 21 and the inside seat heat exchanger side sensor 22 has passed the peak temperature Tpeak is peaked from the current temperature Tref when the seat outside inlet sensor 21B is used. The temperature Tpeak is obtained, and as shown in case 5 of Table 3, the peak temperature Tpeak is compared with the current temperature Tref, and it can be determined that Tpeak> Tref.

  In addition, the judgment that the temperature change of the outside-seat heat exchanger side sensor 21 and the inside-seat heat exchanger side sensor 22 has passed the peak temperature Tpeak when the seat inside inlet sensor 22B is used is shown in Case 6 of Table 3. As shown, the peak temperature Tpeak obtained from the current temperature Tref is compared with the current temperature Tref, and it can be determined that Tpeak <Tref.

  Therefore, the operation / stop control of the water pump 13a by the seat cooling control circuit 23 can be executed according to the flowchart shown in FIG. 5, and first, the ignition switch (IGN) 20 as the initial operation means is turned on in step S11. After the initial temperature Tstart is read in step S12, the water pump 13a is operated in step S13, and the heat exchange medium is circulated between the in-seat heat exchanger 11 and the out-of-seat heat exchanger 12.

  Next, in step S14, the current temperature Tref is measured, and it is determined whether or not the current temperature Tref meets the conditions shown in Table 2 (Case 3 or Case 4). If the current temperature Tref is met, the current temperature Tref is converted to the peak temperature Tpeak in step S15. After that, in step S16, it is determined whether or not the conditions in Table 3 (Case 5 or Case 6) are met, and if so, a signal for stopping the water pump 13a is output in step S17.

  Therefore, according to the seat surface cooling apparatus according to the present embodiment, the stop timing of the water pump 13a is controlled by the seat cooling control circuit 23 from the temperature change of the outside seat heat exchanger side sensor 21 or the inside seat heat exchanger side sensor 22. However, in the present embodiment, the heat exchange medium of the in-seat heat exchanger 11 and the outside heat of the seat are changed by the temperature change of any one of the outside seat heat exchanger side sensor 21 or the in-seat heat exchanger side sensor 22. After determining that the replacement of the exchanger 12 with the heat exchange medium has been started, when it is determined that the temperature change has passed the peak temperature Tpeak, a stop signal is output to the water pump 13a.

  Thus, since the stop timing of the water pump 13a can be controlled from the peak temperature Tpeak, it is possible to more accurately determine whether to replace the heat exchange medium of the in-seat heat exchanger 11 and the heat exchange medium of the out-of-seat heat exchanger 12. Even in the present embodiment, any one of the outside-seat heat exchanger side sensor 21 and the in-seat heat exchanger side sensor 22 may be used, and the configuration can be simplified and an inexpensive vehicle seat can be provided. Obtainable.

  Further, as shown in FIG. 2, the outside seat heat exchanger side sensor 21 is a seat outside inlet sensor 21 </ b> B disposed at the medium inlet portion of the outside seat heat exchanger 12, and the inside seat heat exchanger side sensor. 22 is a sheet inner side inlet sensor 22B arranged at the medium inlet portion of the in-seat heat exchanger 11, and therefore, when the stop timing of the water pump 13a is controlled from the peak value Tpeak, the heat of the in-seat heat exchanger 11 The replacement of the exchange medium and the heat exchange medium of the out-of-seat heat exchanger 12 can be determined more accurately.

  (Third Embodiment) FIG. 6 is a control block diagram of a seat surface cooling apparatus according to the present embodiment, and FIG. 7 is an explanatory diagram showing a flowchart for controlling the seat surface cooling apparatus. The seat surface cooling apparatus according to this embodiment includes the same components as those of the seat surface cooling apparatus according to the first embodiment. Therefore, the same components are denoted by common reference numerals, and redundant description is omitted.

  As shown in FIG. 6, the seat surface cooling apparatus 10 </ b> A according to the present embodiment is configured basically in the same manner as the seat surface cooling apparatus 10 of the first embodiment, and a water pump with an ignition switch (IGN) 20. 13a is initially operated, and the stop timing of the water pump 13a is controlled by the seat cooling control circuit 23.

  However, in the present embodiment, the seat cooling control circuit 23 is configured so that the in-seat heat exchanger is changed by two temperature changes of the outside-seat heat exchanger side sensor 21 and the in-seat heat exchanger side sensor 22 as shown in FIG. When the heat exchange medium 11 is substantially replaced with the heat exchange medium of the heat exchanger 12 outside the seat, a stop signal is output to the water pump 13a.

  At this time, the seat outer heat exchanger side sensor 21 is a seat outer outlet sensor 21A arranged at the medium outlet portion of the seat outer heat exchanger 12 as in the first embodiment, and the seat outer heat exchanger side. The sensor 22 is a sheet inner outlet sensor 22A disposed at the medium outlet portion of the in-sheet heat exchanger 11 (see FIG. 2).

Therefore, the determination that the heat exchange medium of the in-seat heat exchanger 11 is substantially replaced with the heat exchange medium of the outside-sheet heat exchanger 12 using the seat outer outlet sensor 21A and the seat inner outlet sensor 22A is shown in Table 4. It can be known from the temperature change shown.

  That is, in order to determine whether to replace the heat exchange medium, first, the initial temperatures (initial values of temperature sensors) Tstart of both the seat outer outlet sensor 21A and the seat inner outlet sensor 22A are measured, and the initial temperature Tstart and the water are then measured. When the detected value of the seat outer outlet sensor 21A becomes Tstart <Tref and the detected value of the seat inner outlet sensor 22A becomes Tstart> Tref by comparing each current temperature Tref after the operation of the pump 13a. The replacement of the heat exchange medium can be determined.

  Therefore, the operation / stop control of the water pump 13a by the seat cooling control circuit 23 can be executed according to the flowchart shown in FIG. 7. First, in step S21, the ignition switch (IGN) 20 as the initial operation means is turned ON. In step S22, the initial temperature Tstart of the two outlet sensors 21A and 22A is read, and in step S23, the water pump 13a is operated to exchange heat between the in-seat heat exchanger 11 and the out-seat heat exchanger 12. Circulate the medium.

  Next, in step S24, the current temperatures Tref of the two outlet sensors 21A and 22A are measured, and it is determined whether or not they meet the conditions shown in Table 4. If so, the water pump 13a is stopped in step S25. Output a signal.

  Therefore, according to the seat surface cooling apparatus according to the present embodiment, the replacement of the heat exchange medium of the in-seat heat exchanger 11 and the heat exchange medium of the out-of-seat heat exchanger 12 is performed by using the outside-heat-seat-side sensor 21 and Since the determination can be made based on the two temperature changes of the in-seat heat exchanger side sensor 22, the replacement of the heat exchange medium of the in-seat heat exchanger 11 and the heat exchange medium of the out-of-seat heat exchanger 12 can be more accurately determined. It is possible to further enhance the cooling effect of the sheet surfaces 2a and 3a.

  Further, even in the present embodiment, as in the first embodiment, the outside-sheet heat exchanger-side sensor 21 is a sheet outside outlet sensor 21A disposed at the medium outlet portion of the outside-sheet heat exchanger 12, Further, since the in-seat heat exchanger side sensor 22 is a seat inside outlet sensor 22A disposed at the medium outlet portion of the in-seat heat exchanger 11, the heat exchange medium and the outside heat exchange of the in-seat heat exchanger 11 are performed. It is possible to more accurately determine the replacement of the vessel 12 with the heat exchange medium.

  (Fourth Embodiment) FIG. 8 is an explanatory diagram showing a flowchart for controlling the seat surface cooling apparatus according to this embodiment. The seat surface cooling apparatus according to the present embodiment includes the same components as those of the seat surface cooling apparatus according to the second embodiment. Therefore, the same components are denoted by common reference numerals, and redundant description is omitted.

  The seat surface cooling apparatus according to the present embodiment is basically configured in substantially the same manner as the seat surface cooling apparatus 10A of the second embodiment, and the water pump 13a is initially operated by an ignition switch (IGN) 20 and the seat. The cooling control circuit 23 controls the stop timing of the water pump 13 a, and the seat cooling control circuit 23 has two temperatures of the seat outside heat exchanger side sensor 21 and the seat inside heat exchanger side sensor 22. The change determines the replacement of the heat exchange medium of the in-seat heat exchanger 11 and the heat exchange medium of the outside-sheet heat exchanger 12.

  However, in the present embodiment, the sheet cooling control circuit 23 is configured so that the heat exchange medium and the sheet of the in-sheet heat exchanger 11 are changed by two temperature changes of the outside-sheet heat exchanger side sensor 21 and the in-sheet heat exchanger side sensor 22. After determining that the replacement of the external heat exchanger 12 with the heat exchange medium is started, a stop signal is output to the water pump 13a when it is determined that the temperature change has passed the peak temperature Tpeak.

  At this time, the seat outer heat exchanger side sensor 21 is a seat outer side inlet sensor 21B arranged at the medium inlet portion of the seat outer heat exchanger 12 as in the second embodiment, and the seat inner heat exchanger side. The sensor 22 is a sheet inside inlet sensor 22B disposed in the medium inlet portion of the in-sheet heat exchanger 11 (see FIG. 2).

Therefore, the determination that the heat exchange medium of the in-seat heat exchanger 11 is substantially replaced with the heat exchange medium of the out-of-seat heat exchanger 12 using both the seat outer inlet sensor 21B and the seat inner inlet sensor 22B is as follows. It can be known from the temperature change shown in FIG.

  That is, in order to determine whether to replace the heat exchange medium, first, initial temperatures (initial values of temperature sensors) Tstart of both the seat outer inlet sensor 21B and the seat inner inlet sensor 22B are measured, and the initial temperature Tstart and the water are then measured. Each of the current temperatures Tref after the operation of the pump 13a is compared. As shown in Table 5, the detected value of the seat outer inlet sensor 21B is Tstart <Tref, and the detected value of the seat inner inlet sensor 22B is Tstart>. When Tref is reached, the replacement of the heat exchange medium can be determined.

The determination that the temperature change of the outside seat heat exchanger side sensor 21 and the inside seat heat exchanger side sensor 22 has passed the peak temperature Tpeak is based on the current temperatures of both the seat outside inlet sensor 21B and the seat inside inlet sensor 22B. Each peak temperature Tpeak is obtained from Tref, and as shown in Table 6, the detection value of the seat outer entrance sensor 21B satisfies Tpeak> Tref, and the detection value of the seat inner entrance sensor 22B satisfies Tpeak> Tref. it can.

  Therefore, the operation / stop control of the water pump 13a by the seat cooling control circuit 23 can be executed according to the flowchart shown in FIG. 8. First, in step S31, the ignition switch (IGN) 20 as the initial operation means is turned on. Then, after reading the initial temperatures Tstart of the two inlet sensors 21B and 22B in step S32, the water pump 13a is operated in step S33, and heat is exchanged between the in-seat heat exchanger 11 and the out-of-seat heat exchanger 12. Circulate the medium.

  Next, in step S34, the current temperatures Tref of the two inlet sensors 21B and 22B are measured, and it is determined whether or not the conditions of Table 5 are met. If they are met, the respective current temperatures Tref are determined in step S35. After setting the peak temperature Tpeak, it is determined whether or not the conditions in Table 6 are met in step S36, and if so, a signal for stopping the water pump 13a is output in step S37.

  Therefore, according to the seat surface cooling apparatus according to the present embodiment, the replacement of the heat exchange medium of the in-seat heat exchanger 11 and the heat exchange medium of the out-of-seat heat exchanger 12 is performed by using the outside-heat-seat-side sensor 21 and Since the determination can be made based on the two temperature changes of the in-seat heat exchanger side sensor 22, the replacement of the heat exchange medium of the in-seat heat exchanger 11 and the heat exchange medium of the out-of-seat heat exchanger 12 can be more accurately determined. It is possible to further enhance the cooling effect of the sheet surfaces 2a and 3a.

  Also in the present embodiment, the seat outer heat exchanger side sensor 21 is a seat outer outlet sensor 21A disposed at the medium outlet portion of the seat outer heat exchanger 12 as in the first embodiment. In addition, since the in-seat heat exchanger side sensor 22 is a seat inside outlet sensor 22A disposed at the medium outlet portion of the in-seat heat exchanger 11, the heat exchange medium and the outside heat of the seat in the in-seat heat exchanger 11 are used. It is possible to more accurately determine the replacement of the exchanger 12 with the heat exchange medium.

  (Fifth Embodiment) FIG. 9 is a control block diagram of a seat surface cooling apparatus according to this embodiment. The seat surface cooling apparatus according to this embodiment includes the same components as those of the seat surface cooling apparatus according to the first embodiment. Therefore, the same components are denoted by common reference numerals, and redundant description is omitted.

  The seat surface cooling device 10B according to the present embodiment is basically configured in substantially the same manner as the seat surface cooling device 10 of the first embodiment, and initially operates the water pump 13a with an ignition switch (IGN) 20, The seat cooling control circuit 23 controls the stop timing of the water pump 13a based on the temperature change of the outside seat heat exchanger side sensor 21 and / or the inside seat heat exchanger side sensor 22.

  However, in the present embodiment, as shown in FIG. 9, the ignition switch (IGN) 20, the seat outside heat exchanger side sensor 21, and / or the seat interior is used for the operation / stop control of the water pump 13 a by the seat cooling control circuit 23. In addition to the heat exchanger side sensor 22, the detection value of the thermal load detection means 24 for detecting the thermal load state of the vehicle body based on the room temperature, the outside air temperature, the amount of solar radiation, etc. is added to control the stop timing of the water pump 13a. It is.

  That is, as the thermal load detecting means 24, a room temperature sensor 25, an outside air temperature sensor 26, a solar radiation sensor 27, and the like are used in the present embodiment.

  Therefore, according to the seat surface cooling apparatus of the present embodiment, the seat cooling control circuit 23 adds the detection values of the thermal load detection means 24 such as the room temperature sensor 25, the outside air temperature sensor 26, and the solar radiation sensor 27 to add the water pump 13a. Since the stop timing of the water pump 13a can be controlled more precisely according to the thermal load state of the vehicle body caused by the room temperature, the outside air temperature, the amount of solar radiation, and the like.

  (Sixth Embodiment) FIG. 10 is a control block diagram of a seat surface cooling apparatus according to this embodiment. The seat surface cooling apparatus according to this embodiment includes the same components as those of the seat surface cooling apparatus according to the first embodiment. Therefore, the same components are denoted by common reference numerals, and redundant description is omitted.

  The seat surface cooling device 10C according to the present embodiment is basically configured in substantially the same manner as the seat surface cooling device 10 of the first embodiment, and initially operates the water pump 13a with an ignition switch (IGN) 20, The seat cooling control circuit 23 controls the stop timing of the water pump 13a based on the temperature change of the outside seat heat exchanger side sensor 21 and / or the inside seat heat exchanger side sensor 22.

  Here, in this embodiment, as shown in FIG. 10, the seat cooling control circuit 23 detects the operating status of the air conditioner (not shown) by the air conditioning control circuit 28, and adds the detected value to the water pump 13 a. The stop timing is controlled.

  In this case, the air conditioning control circuit 28 receives detection values of the thermal load detection means 24 such as the room temperature sensor 25, the outside air temperature sensor 26, and the solar radiation sensor 27 shown in the fifth embodiment, and air conditioning is performed based on the detection values. Control is to be performed.

  Therefore, according to the seat surface cooling apparatus according to the present embodiment, the seat cooling control circuit 23 can control the stop timing of the water pump 13a by adding the detection value of the air conditioner (air conditioning control circuit 28). The stop timing of the water pump 13a can be controlled more finely according to the control state.

  (Seventh Embodiment) FIG. 11 is a control block diagram of a seat surface cooling apparatus according to this embodiment. The seat surface cooling apparatus according to the present embodiment includes the same components as the seat surface cooling apparatus according to the sixth embodiment. Therefore, the same components are denoted by common reference numerals, and redundant description is omitted.

  The seat surface cooling apparatus 10D of the present embodiment has a configuration in which the heater 29 for heating the seat surface is added to the seat surface cooling apparatus 10C of the sixth embodiment, and thus, by adding the heater 29 in this way, the seat surface The seat cooling control circuit 23 of the cooling device 10C is a seat cooling / heating control circuit 23A in the seat surface cooling device 10D of the present embodiment, and the detection value of the seat temperature sensor 30 is input to the seat cooling / heating control circuit 23A.

  Therefore, according to the seat surface cooling device 10D according to the present embodiment, the seat surfaces 2a and 3a can be heated, and the seat cooling and heating control circuit 23A can perform heating while coordinating the cooling of the seat surfaces 2a and 3a. Thus, the comfort when seated on the vehicle seat 1 in winter can be increased.

  By the way, in each said embodiment, although the sheet | seat cooling control circuit 23 (seat cooling / heating control circuit 23A) illustrated the case where control of the stop timing of the water pump 13a was controlled, it is not restricted to this, Outside seat heat When the temperature of the exchanger-side sensor 21 becomes higher than the temperature of the in-seat heat exchanger-side sensor 22, the water pump 13a is stopped and the temperature of the outside-seat heat exchanger-side sensor 21 is changed to the in-seat heat exchanger side. When the temperature of the sensor 22 becomes lower, the water pump 13a can be restarted.

  In this case, in each embodiment, as shown in FIG. 2, the seat outer heat exchanger 12 is provided with a seat outer outlet sensor 21 </ b> A or a seat outer inlet sensor 21 </ b> B, and the seat inner heat exchanger 11 has a seat inner outlet. Although the case where the sensor 22A or the seat inner entrance sensor 22B is provided is disclosed, the seat outer intermediate sensor 21C is provided in the middle portion of the seat outer heat exchanger 12 and the middle portion of the seat inner heat exchanger 11 is not limited thereto. The seat inner intermediate sensor 22C is provided, and the detected temperatures of the seat outer intermediate sensor 21C and the seat inner intermediate sensor 22C are input to the seat cooling control circuit 23, and the timing of stopping and restarting the water pump 13a is as follows: Control can also be performed as shown in a) to (d).

  (A) When the seat outer outlet sensor 21A (detection temperature T1out) and the seat inner inlet sensor 22B (detection temperature T2in) are used, the water pump 13a is stopped when T1out> T2in, and the water pump 13a is stopped when T1out <T2in. Reactivate.

  (B) When the seat outer outlet sensor 21A (detection temperature T1out) and the seat inner outlet sensor 22A (detection temperature T2out) are used, the water pump 13a is stopped when T1out> T2out and the water pump 13a is stopped when T1out <T2out. Reactivate.

  (C) When the seat outside inlet sensor 21B (detection temperature T1in) and the seat inside exit sensor 22A (detection temperature T2out) are used, the water pump 13a is stopped when T1in> T2out, and the water pump 13a is stopped when T1in <T2out. Reactivate.

  (D) When the seat outer intermediate sensor 21C (detection temperature T1mid) and the seat inner intermediate sensor 22C (detection temperature T2mid) are used, the water pump 13a is stopped when T1mid> T2mid, and the water pump 13a is stopped when T1mid <T2mid. Reactivate.

  Accordingly, the seat cooling control circuit 23 (seat cooling / heating control circuit 23A) in this way causes the water pump 13a when the temperature of the outside-seat heat exchanger side sensor 21 becomes higher than the temperature of the in-seat heat exchanger side sensor 22. Since the water pump 13a can be restarted when the temperature of the outside seat heat exchanger side sensor 21 becomes lower than the temperature of the inside seat heat exchanger side sensor 22, the outside seat heat exchange is always performed. By replacing the heat exchange medium lowered in temperature with the heat exchanger medium warmed in the in-sheet heat exchanger 11, the cooling effect of the sheet surfaces 2a and 3a can be maintained longer.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and various modifications can be made.

  For example, in each of the above embodiments, the seat cushion side heat exchanger 11A and the seat back side heat exchanger 11B are provided on the seat surface 2a of the seat cushion 2 and the seat surface 3a of the seat back 3, so that the seat cushion 2 and the seat back However, the in-seat heat exchanger 11 may be provided on either the seat surface 2a of the seat cushion 2 or the seat surface 3a of the seat back. An in-seat heat exchanger 11 can also be provided on the front surface of the headrest 4.

  Further, the ignition switch 20 is used as the initial operation means. However, the ignition switch 20 is not limited to this, and means for detecting the seated state or the seated state of the occupant, for example, a switch for detecting the seated state of the occupant, or a door A signal such as a door switch or a door lock switch that detects the opening of the door can also be used.

1 is a side sectional view of a vehicle seat equipped with a seat surface cooling device according to a first embodiment of the present invention. The schematic block diagram which expand | deploys and shows the sheet surface cooling apparatus concerning 1st Embodiment of this invention. The control block diagram of the sheet surface cooling device concerning 1st Embodiment of this invention. Explanatory drawing which shows the flowchart for controlling the seat surface cooling apparatus concerning 1st Embodiment of this invention. Explanatory drawing which shows the flowchart for controlling the seat surface cooling apparatus concerning 2nd Embodiment of this invention. The control block diagram of the sheet surface cooling device concerning 3rd Embodiment of this invention. Explanatory drawing which shows the flowchart for controlling the seat surface cooling apparatus concerning 3rd Embodiment of this invention. Explanatory drawing which shows the flowchart for controlling the seat surface cooling apparatus concerning 4th Embodiment of this invention. The control block diagram of the sheet surface cooling device concerning 5th Embodiment of this invention. The control block diagram of the sheet surface cooling device concerning 6th Embodiment of this invention. The control block diagram of the sheet surface cooling device concerning 7th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 2a Seat cushion seat surface 3 Seat back 3a Seat back seat surface 10, 10A, 10B, 10C, 10D Seat surface cooling device 11 In-seat heat exchanger 11A Seat cushion side heat exchanger (seat Internal heat exchanger)
11B Seat back heat exchanger (in-seat heat exchanger)
12 Heat exchanger outside seat 13 Medium circulation means 13a Water pump 20 Ignition switch (initial operation means)
21 Seat outside heat exchanger side sensor 21A Seat outside outlet sensor 21B Seat outside entrance sensor 21C Seat outside intermediate sensor 22 Seat inside heat exchanger side sensor 22A Seat inside exit sensor 22B Seat inside entrance sensor 22C Seat inside intermediate sensor 23 Seat cooling control Circuit (operation stop control means)
24 Thermal load detection means 28 Air conditioning control circuit (air conditioner)

Claims (10)

An in-seat heat exchanger (11) embedded in the seat surface (2a, 3a) which is the surface side of the vehicle seat (1) comprising the seat cushion (2) and the seat back (3);
An outside seat heat exchanger (12) disposed on the back side of the vehicle seat (1);
A medium circulation means (13) for circulating a heat exchange medium between the in-seat heat exchanger (11) and the out-of-seat heat exchanger (12);
Initial operation means (20) for starting operation of the medium circulation means (13);
Stop of the medium circulation means (13) based on at least one of the temperature change of the medium in the in-seat heat exchanger (11) and the temperature change of the medium in the out-of-sheet heat exchanger (12) An operation stop control means (23) for controlling the timing ,
The operation stop control means (23) is based on at least one of a temperature change of the medium in the in-seat heat exchanger (11) and a temperature change of the medium in the outside-seat heat exchanger (12). When it is determined that the heat exchange medium of the in-seat heat exchanger (11) is substantially replaced with the heat exchange medium of the out-of-seat heat exchanger (12), a stop signal is output to the medium circulation means (13). A seat surface cooling device for a vehicle seat. An in-seat heat exchanger (11) embedded in the seat surface (2a, 3a) which is the surface side of the vehicle seat (1) comprising the seat cushion (2) and the seat back (3);
An outside seat heat exchanger (12) disposed on the back side of the vehicle seat (1);
A medium circulation means (13) for circulating a heat exchange medium between the in-seat heat exchanger (11) and the out-of-seat heat exchanger (12);
Initial operation means (20) for starting operation of the medium circulation means (13);
Stop of the medium circulation means (13) based on at least one of the temperature change of the medium in the in-seat heat exchanger (11) and the temperature change of the medium in the out-of-sheet heat exchanger (12) An operation stop control means (23) for controlling the timing,
The operation stop control means (23) is based on at least one of a temperature change of the medium in the in-seat heat exchanger (11) and a temperature change of the medium in the outside-seat heat exchanger (12). Then, after determining that the replacement of the heat exchange medium of the in-seat heat exchanger (11) and the heat exchange medium of the outside-sheet heat exchanger (12) has started, the temperature change has passed a peak temperature. A seat surface cooling device for a vehicle seat, which outputs a stop signal to the medium circulating means (13) at the time of determination . An in-seat heat exchanger (11) embedded in the seat surface (2a, 3a) which is the surface side of the vehicle seat (1) comprising the seat cushion (2) and the seat back (3);
An outside seat heat exchanger (12) disposed on the back side of the vehicle seat (1);
A medium circulation means (13) for circulating a heat exchange medium between the in-seat heat exchanger (11) and the out-of-seat heat exchanger (12);
Initial operation means (20) for starting operation of the medium circulation means (13);
Stop of the medium circulation means (13) based on at least one of the temperature change of the medium in the in-seat heat exchanger (11) and the temperature change of the medium in the out-of-sheet heat exchanger (12) An operation stop control means (23) for controlling the timing,
The operation stop control means (23) is based on both the temperature change of the medium in the in-seat heat exchanger (11) and the temperature change of the medium in the out-of-sheet heat exchanger (12). A stop signal is output to the medium circulation means (13) when it is determined that the heat exchange medium of the heat exchanger (11) is substantially replaced with the heat exchange medium of the out-of-seat heat exchanger (12). A seat surface cooling device for a vehicle seat. An in-seat heat exchanger (11) embedded in the seat surface (2a, 3a) which is the surface side of the vehicle seat (1) comprising the seat cushion (2) and the seat back (3);
An outside seat heat exchanger (12) disposed on the back side of the vehicle seat (1);
A medium circulation means (13) for circulating a heat exchange medium between the in-seat heat exchanger (11) and the out-of-seat heat exchanger (12);
Initial operation means (20) for starting operation of the medium circulation means (13);
Stop of the medium circulation means (13) based on at least one of the temperature change of the medium in the in-seat heat exchanger (11) and the temperature change of the medium in the out-of-sheet heat exchanger (12) An operation stop control means (23) for controlling the timing,
The operation stop control means (23) is based on both the temperature change of the medium in the in-seat heat exchanger (11) and the temperature change of the medium in the out-of-sheet heat exchanger (12). After determining that the replacement of the heat exchange medium of the heat exchanger (11) and the heat exchange medium of the out-of-seat heat exchanger (12) has started, the time when it is determined that the temperature change has passed the peak temperature A seat surface cooling device for a vehicle seat , wherein a stop signal is output to the medium circulation means (13) . An outside sheet heat exchanger side sensor (21) for detecting a medium temperature in the outside sheet heat exchanger (12) at an appropriate part of the outside sheet heat exchanger (12);
The seat surface cooling device for a vehicle seat according to claim 1 or 3 , wherein the outside seat heat exchanger side sensor (21) is arranged at a medium outlet portion of the outside seat heat exchanger (12). . An in-seat heat exchanger side sensor (22) for detecting a medium temperature in the in-seat heat exchanger (11) at an appropriate part of the in-seat heat exchanger (11);
The seat surface cooling device for a vehicle seat according to claim 1 or 3 , wherein the in-seat heat exchanger side sensor (22) is disposed at a medium outlet portion of the in-seat heat exchanger (11). . An outside sheet heat exchanger side sensor (21) for detecting a medium temperature in the outside sheet heat exchanger (12) at an appropriate part of the outside sheet heat exchanger (12);
The seat surface cooling device for a vehicle seat according to claim 2 or 4 , wherein the outside seat heat exchanger side sensor (21) is disposed at a medium inlet portion of the outside seat heat exchanger (12). . An in-seat heat exchanger side sensor (22) for detecting a medium temperature in the in-seat heat exchanger (11) at an appropriate part of the in-seat heat exchanger (11);
The seat surface cooling device for a vehicle seat according to claim 2 or 4 , wherein the in-seat heat exchanger side sensor (22) is disposed at a medium inlet portion of the in-seat heat exchanger (11). . The operation stop control means (23) adds the detection value of the thermal load detection means (24) for detecting the thermal load state of the vehicle body based on the room temperature, the outside air temperature, the amount of solar radiation, etc., and the medium circulation means (13). The seat surface cooling device for a vehicle seat according to any one of claims 1 to 8 , wherein the stop timing is controlled . The operation stop control means (23) adds the detected value of the operating status of the air conditioner, one of claims 1-9, characterized by controlling the stop timing of the medium circulating means (13) The seat surface cooling apparatus for a vehicle seat according to one.

Images