JP2008012980A - Temperature regulator for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a temperature regulator for a vehicle capable of adequately cooling an interior trim material in a vehicle compartment without lowering the cooling performance of an air conditioner in the vehicle compartment. <P>SOLUTION: This temperature regulator for a vehicle consists of a heat receiving part 5 attached on the back side of an instrument panel 3, a heat radiating part 6 provided in the lower part of a seat 12 in the vehicle compartment 2, the circulation passage 7 of a medium circulating in these heat receiving part 5 and heat radiating part 6, a reservoir tank 8 storing the medium, a pump 9 sending the medium stored in this reservoir tank 8 to the heat receiving part 5, and a control part 10. When the temperature difference between the medium in the heat receiving part 5 and that in the heat radiating part 6 is at a prescribed value and more, the medium is circulated via the circulation passage 7, and the medium that reached a high temperature in the heat receiving part 5 is returned and the heat thereof is radiated in the heat radiating part 6, and then, the medium in a low temperature is sent to the heat receiving part 5 from the reservoir tank 8, thereby cooling the instrument panel 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a temperature control device for a vehicle capable of cooling an interior material in a passenger compartment whose temperature rises due to solar radiation.

  When a vehicle is parked under hot weather, sunlight may enter the vehicle interior through the front window at the front of the vehicle compartment, and interior materials inside the vehicle interior, such as instrument panels, may become as high as 60 to 80 ° C. is there.

Therefore, conventionally, a heat pipe having one end connected to the evaporator of the vehicle interior air conditioner is laid to the vicinity of the instrument panel in the vehicle interior, and the refrigerant is sent from the evaporator into the heat pipe to cool the instrument panel. What was made is proposed (for example, patent document 1).
JP 2004-138366 A

  However, in the technique disclosed in Patent Document 1, since the refrigerant is sent from the evaporator of the vehicle interior air conditioner to the heat pipe to cool the instrument panel, the cooling performance of the air conditioner is deteriorated and the inside of the heat pipe is reduced. There is a problem that the amount of heat exchange when the medium passes is small and the instrument panel cannot be cooled sufficiently.

  Then, an object of this invention is to obtain the temperature control apparatus for vehicles which can cool the interior material of the vehicle interior heated by solar radiation, without reducing the cooling performance of a vehicle interior air conditioner.

  In the invention concerning Claim 1, the heat receiving part (5) provided in the 1st area | region where temperature rises by solar radiation, and the thermal radiation part (2) provided in the 2nd area | region where temperature is lower than the said 1st area | region 6), a circulation path (7) for the medium circulating through the heat receiving section (5) and the heat radiation section (6), and a pump (9) for circulating the medium.

  The invention according to claim 2 is characterized in that the heat dissipating part (6) is provided under the seat (12) of the vehicle (1).

  In the invention concerning Claim 3, the said thermal radiation part (6) was provided in the instrument panel (3) of a vehicle (1), It is characterized by the above-mentioned.

  According to the first aspect of the present invention, since the medium becomes hot at the heat receiving portion provided in the first region where the temperature rises due to solar radiation, the medium that has become hot flows through the circulation path, The interior material in the passenger compartment heated by solar radiation can be cooled by radiating heat from the heat radiating section provided in the second area having a temperature lower than that of the first area, and sending a low-temperature medium to the heat receiving section by the pump. it can. As a result, a relatively large amount of heat exchange can be obtained at the heat receiving portion, so that the interior material in the vehicle compartment can be sufficiently cooled by performing heat exchange at the heat receiving portion. Moreover, since the medium is circulated by the circulation path and the heat radiating unit separate from the vehicle interior air conditioner, the heat is radiated, so that the interior material in the vehicle interior can be cooled without deteriorating the cooling performance of the air conditioner.

  According to the invention of claim 2, since the solar radiation is blocked by the vehicle seat, the solar radiation is not received in the portion under the seat, so that the temperature rise of the heat radiating portion provided under the vehicle seat can be suppressed, and the heat radiation The heat can be radiated more effectively at the part.

  According to the invention of claim 3 of the present invention, since solar radiation is not inserted into the instrument panel, it is possible to suppress the temperature rise of the heat dissipating part provided in the instrument panel, and more effective heat dissipation at the heat dissipating part. can do.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of a vehicle temperature control device according to an embodiment of the present invention, and FIG. 2 is a flowchart showing a processing procedure when an instrument panel in a vehicle compartment is cooled by the vehicle temperature control device of FIG. It is.

  As shown in FIG. 1, an instrument panel 3 is provided in a front portion of a passenger compartment 2 formed in the vehicle 1, and a vehicle air conditioner (not shown) is accommodated in the instrument panel 3.

  And the temperature control apparatus 4 for vehicles of this embodiment is the heat receiving part 5 provided in the 1st area | region where temperature rises by solar radiation, and the thermal radiation provided in the 2nd area | region where temperature is lower than the said 1st area | region. Unit 6, a medium that circulates through heat receiving unit 5 and heat radiating unit 6, for example, a cooling water circulation path 7, a reservoir tank 8 that stores the medium, and a medium stored in reservoir tank 8 is sent out to heat receiving unit 5. It comprises a pump 9 and a control unit 10 that performs various controls.

  The heat receiving unit 5 is configured by, for example, an LLC pack in which a resin sheet is formed in a bag shape. The heat receiving unit 5 collects a medium when the pump 9 is stopped, and the medium flows in and out when the pump 9 is operated. It has become. Moreover, the heat receiving part 5 is affixed on the interior material with a large temperature rise by solar radiation, for example, the instrument panel 3 back surface.

  The heat dissipating part 6 is composed of a fin-type heat dissipator and is equipped with an electric fan 11. By the way, even if the temperature of the instrument panel 3 surface rises to 60 to 80 ° C. due to solar radiation, the temperature rises because the solar radiation is blocked by the seat 12 in the passenger compartment 2 and does not receive solar radiation under the seat 12. It can be relatively small, for example, it can be accommodated by a rise to 30 ° C.

  The control unit 10 receives the temperature signals from the temperature sensor 13 that detects the temperature of the medium in the heat receiving unit 5 and the other temperature sensor 14 that detects the temperature of the medium in the reservoir tank 8, and the pump 9 and The electric fan 11 is controlled, and the timer 15 also measures time.

  In this embodiment, the instrument panel 3 in the passenger compartment 2 is cooled according to the processing procedure shown in FIG. That is, when the door of the vehicle 1 is locked with an electronic key (not shown), a series of operations are started. First, in step S1, the temperature of the medium in the heat receiving unit 5 is detected by the temperature sensor 13, and the inside of the reservoir tank 8 is also detected. The temperature of the medium is detected by the temperature sensor 14. Then, the control unit 10 compares the temperature of the medium in the heat receiving unit 5 with the temperature of the medium in the reservoir tank 8, and if the temperature difference is equal to or greater than a predetermined value, for example, 20 ° C, step Proceed to S2. In step S 2, a control command is output from the control unit 10, the pump 9 and the electric fan 11 are operated, and time measurement by the timer 15 is started. Next, the medium that has become high temperature in the heat receiving unit 5 is returned through the circulation path 7 and is radiated by the cooling air from the electric fan 11 in the heat radiating unit 6, and then the radiated low temperature medium is stored in the reservoir tank 8. At the same time, a low-temperature medium is sent from the reservoir tank 8 to the heat receiving unit 5 by the pump 9. Next, in step S3, it is determined whether or not the temperature difference between the temperature of the medium in the heat receiving unit 5 and the temperature of the medium in the reservoir tank 8 is 5 ° C. or less, and the temperature difference is 5 °. If it is C or less, the process proceeds to step S4, the pump 9, the electric fan 11, and the timer 15 are stopped, and the process returns to the above step S1.

  On the other hand, if the temperature difference is larger than 5 ° C in step S3, it is determined in step S4 whether or not the time measured by the timer 15 has elapsed for a predetermined time, for example, 10 minutes. In step S4, the pump 9, the electric fan 11, and the timer 15 are stopped, and the process returns to step S1. Further, when the time measured by the timer 15 does not elapse in the step S4, the process returns to the step S3.

  In the embodiment configured as described above, a relatively large heat exchange amount can be obtained by using the heat receiving portion 5 made of the LLC pack. Therefore, by performing heat exchange in the heat receiving portion 5, an instrument panel in the passenger compartment 2 is provided. 3 can be cooled sufficiently. Moreover, the heat radiation capacity can be increased by sending cooling air to the heat radiating section 6 composed of a fin-type heat radiator by the electric fan 11, and at the lower part of the seat 12 of the passenger compartment 2 the temperature rise due to solar radiation is relatively small. Since the heat dissipating part 6 and the reservoir tank 8 are disposed, the heat dissipating in the heat dissipating part 6 and the reservoir tank 8 can be promoted. From this point also, the instrument panel 3 in the passenger compartment 2 is more effectively cooled. it can. Further, since the medium is circulated by using the circulation path 7 and the heat dissipating unit 6 which are separate from the air conditioner in the passenger compartment 2, the cooling is performed without reducing the cooling performance of the air conditioner in the passenger compartment 2. The cooling panel 3 can be cooled.

  As an example, the applicant parks the vehicle 1 for 60 minutes under the conditions of an outside air temperature of 40 ° C., a humidity of 50%, and a solar radiation of 1045 W / mh, and the instrument in the passenger compartment 2 by the vehicle temperature control device 4. As a result of the cooling experiment of the panel 3, the surface temperature (three-point average value) of the instrument panel 3 is 43 ° C. On the other hand, when the cooling is not performed, the surface temperature of the instrument panel 3 (3 The point average value) was 98 ° C. Therefore, since the surface temperature of the instrument panel 3 is reduced by 55 ° C. and the radiation temperature from the instrument panel 3 is reduced by 15 ° C. due to the cooling according to the present embodiment, the instrument panel 3 can be sufficiently cooled. It was confirmed that the sensation felt by the occupant can be suppressed by the radiant heat from the ment panel 3. Incidentally, it is known from conventional literature and test results that if the surface temperature of the instrument panel 3 is reduced by 10 ° C., the radiation to the human body is reduced by about 3 ° C.

  Furthermore, after the instrument panel 3 is cooled as described above, when the vehicle 1 travels at 40 km for 10 minutes, the temperature in the passenger compartment 2 (8-point average value) is 33.2 ° C. The vent outlet temperature (average of four points) into the chamber 2 was 11.5 ° C, and the suction temperature before the air conditioner evaporator was 39.6 ° C. On the other hand, when the vehicle 1 is run at 40 km for 10 minutes without cooling the instrument panel 3, the temperature in the passenger compartment 2 (average value of 8 points) is 36 ° C. The vent blowing temperature (average value of 4 points) was 14.5 ° C, and the suction temperature before the air conditioner evaporator was 43.3 ° C. Therefore, the temperature in the passenger compartment 2 decreases by 2.8 ° C. due to the cooling of the instrument panel 3, the vent blowing temperature into the passenger compartment 2 decreases by 3 ° C., and the suction temperature before the air conditioner evaporator is 3 Since the temperature decreased by 0.7 ° C, it was confirmed that the cool-down (cooling) performance in the passenger compartment 2 was improved by the decrease in the inside air intake temperature of the air conditioner.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, in the said embodiment, although illustrated about the case where the heat receiving part 5 was provided in the back surface of the instrument panel 3 to which temperature rises by solar radiation, the other interior materials with a large temperature rise by solar radiation, for example, the ceiling of the compartment 2 The heat receiving portion 5 may be provided at 16. Moreover, although the case where the thermal radiation part 6 was provided in the lower part of the sheet | seat 12 of the compartment 2 with comparatively low temperature was illustrated instead of the lower part of the sheet | seat 12 of the compartment 2, the other location with comparatively low temperature, For example, the heat radiating section 6 may be provided in the instrument panel 3.

  In the above embodiment, the temperature of the medium in the heat receiving unit 5 is compared with the temperature of the medium in the reservoir tank 8 in step S1 of FIG. 2, and the temperature difference is equal to or greater than a predetermined value. Although the pump 9 and the electric fan 11 are operated, the pump 9 and the electric fan 11 may be operated when the temperature of the medium in the heat receiving unit 5 is equal to or higher than a predetermined value. .

It is a block diagram which shows the temperature control apparatus for vehicles concerning one Embodiment of this invention. It is a flowchart which shows the process sequence at the time of cooling the instrument panel in a vehicle interior by the vehicle temperature control apparatus of FIG.

Explanation of symbols

1 vehicle 2 vehicle compartment 3 instrument panel (interior material)
DESCRIPTION OF SYMBOLS 4 Vehicle temperature control apparatus 5 Heat receiving part 6 Heat radiation part 7 Circulation path 8 Reservoir tank 9 Pump 10 Control part 11 Electric fan 12 Sheet | seat 13,14 Temperature sensor 15 Timer 16 Ceiling (interior material)

Claims (3)

  A heat receiving portion (5) provided in the first region where the temperature rises due to solar radiation, a heat radiating portion (6) provided in the second region where the temperature is lower than the first region, and these heat receiving portions (5) And a temperature control device for a vehicle, comprising: a circulation path (7) of a medium that circulates through the heat radiating section (6); and a pump (9) that circulates the medium.   The temperature control device for a vehicle according to claim 1, wherein the heat dissipating part (6) is provided under a seat (12) of the vehicle (1).   The temperature control device for a vehicle according to claim 1, wherein the heat dissipating part (6) is provided in an instrument panel (3) of the vehicle (1).

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