JP2008049796A - Cooling device for on-vehicle electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device cooling, for example, on-vehicle electronic equipment or the like in cooperation with a vehicle air conditioner without deteriorating quick effect of cooling of the vehicle air conditioner. <P>SOLUTION: The cooling device is the one for cooling the on-vehicle electronic equipment 100 in cooperation with the vehicle air conditioner 10 having a refrigeration cycle for compressing a first heat transfer medium and expanding it, and is provided with a second liquid-state heat transfer medium; a conduit 60 circulated and rotated with the second heat transfer medium; a heat absorving part 30 for performing heat-transfer from the electronic equipment 100 to the second heat transfer medium; a heat release part 40 for performing heat-transfer from the second heat transfer medium to an evaporator 15; and a pump 50 for circulating the second heat transfer medium. The heat release part 40 is coupled to a tank part 15c of the evaporator 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cooling device for cooling a cooling object such as an electronic device mounted on a vehicle in cooperation with a vehicle air conditioner, and more particularly to a cooling device using brine as a heat medium.

  The evaporator of the vehicle air conditioner performs heat exchange between the refrigerant flowing in the evaporator and the air in the passenger compartment. A cooling device that cools a cooling object mounted on the vehicle using this evaporator is, for example, It is known from Patent Document 1. Patent Document 1 describes a cold storage type air conditioner having a cold storage cycle for cooling a cold storage material so that cold air can be supplied even when the vehicle engine is idling. This cold storage cycle uses brine as a heat medium, and the evaporator tube is integrally formed with a double pipe, the refrigerant flows through the inner pipe of the double pipe, the brine flows through the outer pipe, and the brine is It is the structure by which the cool storage material which is a cooling target object is cooled by being cooled.

JP 2001-1753 A

  However, while the brine in the above-described cold storage cycle cools the cold storage material well, the brine flowing through the outer pipe of the double pipe becomes a thermal resistance for heat exchange between the refrigerant and the air in the passenger compartment. As a result, there is a concern that the immediate effectiveness of cooling of the air conditioner may be deteriorated. In addition, the integral molding of the double pipe is complicated in processing, and an evaporator including such a double pipe is special and expensive.

  The present invention has been made in view of the above-described problems of the prior art, and in cooperation with the vehicle air conditioner without deteriorating the cooling effectiveness of the vehicle air conditioner, for example, a cooling object such as an in-vehicle electronic device. It aims at providing the cooling device which cools.

  In order to achieve the above object, the present invention employs the following technical means.

  The invention described in claim 1 cools the cooling object (100) mounted on the vehicle in cooperation with the vehicle air conditioner (10) having a refrigeration cycle for compressing and expanding the first heat medium. The evaporator (15) included in the air conditioner (10) is a cooling device that includes a plurality of tubes arranged in parallel through which the first heat medium circulates, and distribution and collection of the first heat medium to the plurality of tubes. A tank unit (15c) connected to the ends of a plurality of tubes to perform the heat exchange between the air blown by the blower (16) of the air conditioner (10) and the first heat medium The cooling device includes a liquid second heat medium, a pipe line (60) through which the second heat medium flows and circulates, and the transfer from the object to be cooled (100) to the second heat medium. The endothermic part (30) where heat is generated and the second heat medium evaporate And a pump (50) that circulates the second heat medium, and the heat radiating section (40) is a tank section ( 15c).

  Since the heat radiating part of the cooling device is coupled to the tank part of the evaporator of the air conditioner, the heat radiating part is not an obstacle to heat exchange between the first heat medium (refrigerant) and the air in the tubes and fins of the evaporator. In addition, there is no deterioration in the immediate cooling effectiveness of the air conditioner. Even when the air conditioner is stopped and the refrigerant is not circulating in the evaporator, the evaporator, which is usually made of aluminum and has a large surface area, is used as a radiator to dissipate heat from the radiator. Can be made.

  In the invention described in claim 2, the liquid second heat medium is a brine having a freezing point of less than 0 ° C. Therefore, freezing of the second heat medium can be prevented even in a cold region.

  In the invention according to claim 3, the heat radiating section (40) is a separate body from the evaporator (15), and is attached to and coupled to the tank section (15c) of the evaporator. By configuring in this way, it is possible to realize an evaporator that can be applied to the cooling device of the present invention without a slight design change or design change of an existing evaporator.

  In the invention according to claim 4, the cooling device includes a plurality of heat radiation portions (40), and the evaporator (15) includes a plurality of tank portions (15b, 15c) connected to both ends of the tube, A plurality of heat radiation portions (40) are coupled to the plurality of tank portions (15b, 15c). Thereby, the temperature distribution of the core part of an evaporator is eased and the cooling capacity of a cooling device increases.

  In the invention according to claim 5, the cooling device includes a temperature sensor (70) for detecting the temperature (Tb) of the second heat medium, and the temperature (Tb) detected by the temperature sensor (70) is a predetermined temperature ( And a control device (80) for operating the blower (16) of the air conditioner (10) when T1) is reached.

  By configuring in this way, even when the air conditioner is inactive and the refrigerant in the evaporator is not circulating, the heat transmitted from the heat radiating part of the cooling device to the evaporator is blown to the evaporator by blowing the blower air to the evaporator. It can be diffused efficiently.

  In the invention described in claim 6, the air conditioner (10) includes a blower unit case (17) that houses the evaporator (15) and the blower (16) and has an exhaust heat outlet (25) that can be opened and closed. The control device (80) is characterized in that it controls to open the exhaust heat outlet (25) when operating the blower (16). Accordingly, the blower can be operated for the cooling device even when the air conditioner is inactive and the cold air outlet provided in the blower unit case is closed.

  In the invention according to claim 7, when the temperature (Tb) detected by the temperature sensor (70) becomes equal to or lower than the predetermined temperature (T3), the control device (80) has a flow rate of the liquid second heat medium. It is characterized by controlling the pump (50) so as to reduce the pressure. Thereby, it is also possible to prevent harmful effects such as condensation due to excessive cooling of the electronic device.

  The invention according to claim 8 is characterized in that the cooling device further includes a flow rate adjusting valve, and the control device (80) controls the flow rate adjusting valve instead of the pump (50). This also makes it possible to prevent adverse effects such as condensation due to excessive cooling of the electronic device.

  In a ninth aspect of the present invention, the cooling device further includes a second temperature sensor (72) for detecting the temperature (Tk) of the heat absorbing portion (30), and the tube through which the liquid second heat medium circulates. The path (60) includes a bypass pipe (61) that bypasses the heat absorption part (30), and a switching valve (62) provided at a branch part of the bypass pipe (61), and a temperature sensor (70). When the temperature (Tb) detected in (2) becomes equal to or lower than the predetermined temperature (T3), the liquid second heat medium bypasses the heat absorption part (30) and flows through the bypass pipe (61). When the temperature (Tk) detected by the second temperature sensor (72) becomes equal to or higher than another predetermined temperature (T5), the control device (80) is switched so that the second heat medium flows to the heat absorption part (30). It is characterized by switching the valve (62). This also makes it possible to prevent adverse effects such as condensation due to excessive cooling of the electronic device.

  In the invention according to claim 10, the cooling device includes a temperature sensor (70) for detecting the temperature (Tb) of the second heat medium, and the temperature (Tb) detected by the temperature sensor (70) is a predetermined temperature ( And a control device (80) for operating the blower (16) of the air conditioner (10) when reaching T1), and storing the evaporator (15) and the blower (16) and opening and closing exhaust heat. The air conditioner (10) includes a blower unit case (17) having an air outlet (25), and the blower unit case (17) includes an outside air inlet (19), an inside air inlet (18), and an outside air inlet. (19) and an inside / outside air switching door (20) that opens and closes the inside air introduction port (18), and a temperature (Tb) detected by the temperature sensor (70) while the vehicle is traveling at a predetermined speed or higher is a predetermined temperature (T1). ) (80) is characterized by controlling to switch the outside air switching door (20) from the outside air inlet port (19) to open the waste heat vent (25) while introducing air. Thereby, the evaporator can be cooled with the traveling wind without operating the blower, and the heat from the heat radiating portion of the cooling device can be dissipated.

  In addition, the code | symbol in the parenthesis of each said means is an example which shows a corresponding relationship with the specific means as described in the Example mentioned later.

  Next, a preferred first embodiment of the present invention will be described in detail with reference to the accompanying drawings. The cooling device 1 of the first embodiment is for cooling an on-board electronic device, and is configured to dissipate heat generated by the electronic device to an evaporator of a vehicle air conditioner. FIG. 1 is a circuit diagram of the cooling device 1 of the first embodiment and the air conditioner 10 cooperating with the cooling device 1. Referring to this figure, the air conditioner 10 includes a first heat medium ( (Hereinafter referred to as refrigerant), a compressor 11 that compresses the refrigerant, a condenser 12 that cools the compressed and heated refrigerant by heat exchange with outside air, condenses and liquefies, a liquid tank 13 that gas-liquid separates the refrigerant, and refrigerant An expansion valve 14 that expands the refrigerant and an evaporator 15 that exchanges heat between the expanded and low-temperature refrigerant and air are connected by piping, and the refrigerant flows through the pipeline in the direction indicated by the white arrow. . The evaporator 15 is housed in a blower unit case 17 together with a blower 16 that blows air on the evaporator 15, and an inside air inlet 18 and an outside air inlet 19 are opened and closed on the upstream side of the blower 16 of the blower unit case 17. An inside / outside air switching door 20 is provided. On the downstream side of the evaporator 15, a heater core 21 for heating, an air outlet 22 directed toward the upper body of the vehicle occupant, an air outlet 23 directed toward the feet, a defroster air outlet 24, an exhaust heat outlet 25, and Doors 26, 27, and 28 for opening and closing each outlet and an auto / manual switching door 29 are provided.

  The evaporator 15 in this embodiment is a so-called drone cup type that is used in a vehicle air conditioner, and therefore only the schematic structure is shown in FIG. 2, but fins and tubes extending in the vertical direction in the figure. Are connected to the upper and lower ends of the plurality of tubes in order to distribute the refrigerant to the plurality of tubes and to collect the refrigerant from the plurality of tubes, respectively. The upper tank part 15b and the lower tank part 15c which extend in the horizontal direction, the refrigerant | coolant inflow port 15d, and the outflow port 15e are comprised. In addition, although the evaporator 15 of a present Example is equipped with the tank part up and down, in this invention, the evaporator provided with the tank part in one side, for example, the lower side may be sufficient.

  As shown in FIG. 1, the cooling device 1 according to the first embodiment applies a liquid second heat medium between the high-temperature side vehicle-mounted electronic device 100 and the low-temperature side evaporator 15 in the direction of the black arrow in the figure. It is an apparatus which cools the vehicle-mounted electronic device 100 by carrying out circulation circulation. The liquid second heat medium is a brine having a freezing point of less than 0 ° C. in this embodiment. The cooling device 1 is configured by connecting a heat absorbing portion 30 that transmits heat from the electronic device 100 to the brine, a heat radiating portion 40 that transfers heat from the brine to the evaporator 15, and a pump 50 that circulates the brine through a pipeline 60. Yes.

  As shown by reference numeral 40 in FIG. 2, the heat radiating portion includes a heat radiating portion case 41 formed of aluminum in a substantially rectangular parallelepiped box shape, and a brine inflow port provided on the opposite side surface of the heat radiating portion case 41. 42 and an outflow port 43, and the brine formed in the case is filled and circulated. The heat radiating portion 40 is fixed by brazing or caulking so that one side surface of the rectangular parallelepiped having a large area is in close contact with the bottom surface of the lower tank portion 15c of the evaporator. Since the refrigerant accumulated by using the lower tank portion 15c plays the same role as the heat pipe, the cooling capacity can be improved.

  Although a detailed structural diagram of the heat absorbing portion 30 is omitted, the heat absorbing portion 30 is provided on a heat absorbing portion case formed of aluminum in a substantially rectangular parallelepiped box shape and the opposite side surfaces of the case, similarly to the heat radiating portion 40 described above. The brine has an inflow port and an outflow port, and the brine is filled and circulates in a space formed inside the case. A wide side surface of the heat absorbing part case is fixed to the electronic device 100 with a band or the like so as to be in contact with the high heat-generating component of the electronic device 100 and receive heat. For example, the structure may be fixed with screws, and depending on the cooling conditions, the heat absorbing part case may be disposed in the high-temperature air in the electronic device without contacting the heat generating component.

  Next, the operation of the cooling device 1 according to the present embodiment will be described. Heat generated in the electronic device 100 is transferred to the brine by the heat absorbing unit 30, and the brine is sent to the heat radiating unit 40 by the pump 50. Is transferred to the low-temperature refrigerant in the lower tank portion 15c through the one side surface of the heat radiating portion case 41 and the bottom surface of the lower tank portion 15c of the evaporator, and as a result, the electronic device 100 is cooled.

  The above-described heat transfer mode is the case where the compressor 11 of the air conditioner 10 is operated and the low-temperature refrigerant is circulating in the evaporator 15, but the cooling device 1 of the present invention is the compressor of the air conditioner. The electronic device 100 can be cooled even when 11 is not operating. That is, when the compressor 11 is not in operation, the temperature of the evaporator 15 is substantially equal to the ambient air temperature, while the electronic device 100 generates heat and is higher than the ambient air temperature, Since the brine to be transmitted is also higher than the ambient air temperature, the heat held by the brine of the heat radiating unit 40 is conducted to the metal case forming the lower tank portion 15c of the evaporator and the tubes and fins of the evaporator and from there to the ambient air The electronic device 100 is cooled by being diffused. Since the core portion of the evaporator has a large surface area as is well known, the evaporator can be used as a radiator in this way even if there is no refrigerant flowing therethrough. Further, not only the heat transmitted from the brine to the evaporator 15 can be dissipated from the evaporator 15 by natural air cooling, but also the heat can be efficiently dissipated by forced air cooling in which the blower 16 is operated to blow air to the evaporator 15. Furthermore, it is possible to dissipate by forced air cooling in which outside air during vehicle travel is introduced and blown to the evaporator 15 without operating the blower 16.

  The heat dissipating part of the cooling device of the first embodiment is attached to and coupled to the lower tank part of the evaporator. However, in the present invention, the heat dissipating part case and the lower tank part of the evaporator are integrally formed. Also good. In this case, the thermal conductivity can be improved because the contact thermal resistance generated between the separate heat radiation part 40 and the lower tank part of the first embodiment is eliminated.

  Next, the cooling device 2 of the second embodiment will be described below with reference to FIG. FIG. 3 is a schematic view showing a state in which the heat radiating portion 40 is coupled to the evaporator 15, but the cooling device 2 of this embodiment includes two heat radiating portions 40, and not only the lower tank portion 15 c of the evaporator. The heat radiating part 40 is also attached to the upper tank part 15b. Thereby, the temperature distribution of the core part 15a of the evaporator is relaxed and the cooling capacity is enhanced. In addition, in order to make a brine flow from one heat absorption part to the two heat radiation parts 40, the branch part (not shown) is provided in the middle of the pipe line 60. FIG.

  Next, the cooling device 3 of the third embodiment will be described below with reference to FIG. In FIG. 4, the compressor, the condenser, and the like constituting the refrigeration cycle of the air conditioner are not shown. The cooling device 3 of this embodiment has a configuration in which a temperature sensor 70 and a control unit 80 are added to the configuration of the cooling device 1 of the first embodiment, and further includes three heat absorption units 30. The temperature sensor 70 is provided in the middle of the pipe line 60 from the heat radiating unit 40 to the heat absorbing unit 30 in order to detect the temperature of the brine, and the control unit 80 can receive a signal from the temperature sensor 70. Further, each of the three heat absorbing portions 30 is attached to three electronic devices 100.

  The control unit 80 operates the blower 16 in the blower unit case 17 according to the temperature detected by the temperature sensor 70 when the compressor is not operating. Specifically, the brine temperature Tb is a predetermined temperature T1. In such a case, the blower 16 is operated to forcibly air-cool the evaporator 15, and when the detected temperature Tb is lower than the predetermined temperature T2 lower than the predetermined temperature T1, the blower 16 is stopped. Further, when the blower 16 is operated, the control unit 80 operates an electric motor (not shown) that drives the door 28 so as to open the door 28 provided at the exhaust heat outlet 25. In order to reduce the failure rate of the blower motor 16a, the blower 16 may be controlled not to start / stop as described above but to increase or decrease the rotational speed of the blower 16. The temperature measurement location of the brine may be the temperature of the brine inside the heat absorbing portion 30 or the heat radiating portion 40 or the temperature of the case of the heat absorbing portion or the case of the heat radiating portion other than those described above. The temperature may be measured with a temperature sensor.

  Next, the cooling device 4 of the fourth embodiment will be described below with reference to FIG. When the air conditioner is operated to cool the interior of the vehicle, that is, when both the compressor and the blower 16 are operating, the cooling capacity of the cooling device 4 is maximized, but there is a problem caused by excessive cooling. For example, the surface temperature of the electronic device 100 may be lower than the ambient air temperature and condensation may occur in the electronic device 100. For this reason, in the cooling device 4 of the fourth embodiment, the control unit 80 further has a function of adjusting the circulating flow rate of brine by adjusting the output of the pump 50. Thereby, the excessive low temperature of the electronic device 100 is prevented and dew condensation is prevented. When the brine temperature Tb detected by the temperature sensor 70 is equal to or lower than a predetermined temperature T3, the control unit 80 decreases the pump output to reduce the circulating flow rate of the brine, and the temperature Tb is equal to or higher than the predetermined temperature T4. If this happens, the pump output is increased to increase the flow rate. The predetermined temperature T3 is a temperature determined by comparing the inside air temperature Ta detected by the inside air temperature sensor 71 normally held by the air conditioner with the brine temperature Tb, and therefore changes according to the change in the inside air temperature Ta. Temperature.

  FIG. 6 shows a flowchart of control of the cooling device of the fourth embodiment. As shown in FIG. 6, when the compressor and blower of the air conditioner are inactive, the control unit 80 controls ON / OFF of the blower for the cooling device and opening / closing of the exhaust heat outlet, and the air conditioner The brine flow rate is controlled when the compressors and blowers are operating.

  In the cooling device 4 according to the fourth embodiment, the circulation flow rate of the brine is controlled by controlling the output of the pump 50. However, the flow rate adjustment valve is disposed in the brine circulation path, and the control unit 80 adjusts the flow rate. The flow rate may be controlled by adjusting the opening of the valve.

  Next, the cooling device 5 of the fifth embodiment will be described below with reference to FIG. 7 which is a circuit diagram thereof and FIG. 8 which is a flowchart thereof. FIG. 7 does not show the blower unit case, the blower, and the like together with the compressor, the condenser, and the like that constitute the refrigeration cycle of the air conditioner. The cooling device 5 is capable of controlling the blower ON / OFF similarly to the cooling device of the fourth embodiment and controlling the flow rate of brine in order to prevent excessive cooling. In the cooling device 5, a bypass pipeline 61 that bypasses the heat absorption unit 30 is provided in a brine pipeline 60, and a three-way valve 62 is provided in a branch portion of the bypass pipeline 61. Furthermore, in addition to the first temperature sensor 70 that detects the brine temperature, the cooling device 5 of the present embodiment includes the temperature of the case of the heat absorbing unit 30 coupled to the electronic device 100 having the lowest allowable temperature among the three heat absorbing units 30. A second temperature sensor 72 for detecting Tk is provided. When the brine temperature Tb becomes equal to or lower than the predetermined temperature T3, the control unit 80 switches the three-way valve 62 so that the brine flows through the bypass pipe 61, and the temperature of the heat absorption unit 30 detected by the second temperature sensor 72 is detected. When Tk becomes equal to or higher than another predetermined temperature T5, the three-way valve 62 is switched to allow brine to flow through the heat absorbing unit 30.

  Next, the cooling device 6 of the sixth embodiment will be described below with reference to FIG. The cooling device 6 of this embodiment includes a brine pipe 60, a heat absorbing portion 30, a heat radiating portion 40, a pump 50, a temperature sensor 70, and a control portion in the same manner as the cooling device of the third embodiment. This is different from the cooling device of the third embodiment in that the evaporator 15 is configured to be cooled by using the above. In the cooling device 6 of the sixth embodiment, when the brine temperature Tb becomes equal to or higher than the predetermined temperature T1 when the compressor and the blower 16 are not operated and the vehicle is traveling at a predetermined speed or higher, the control unit 80 , The inside / outside air switching door 20 of the blower unit case 17 is switched to introduce outside air. Further, the control unit 80 operates an electric motor (not shown) that drives the door 28 so that the door 28 provided at the exhaust heat outlet 25 is opened at the same time when the inside / outside air switching door 20 is switched to outside air introduction. Operate. As a result, the evaporator 15 is forcibly cooled by the traveling wind and the brine is cooled.

It is a circuit diagram which shows the cooling device of the 1st Example of this invention, the cooling circuit of the air conditioner which cooperates with this cooling device, etc. It is a schematic diagram which shows the state by which the thermal radiation part of the said cooling device was couple | bonded with the evaporator of an air conditioner. It is a schematic diagram which shows the state by which the thermal radiation part of the cooling device of the 2nd Example of this invention was couple | bonded with the evaporator of an air conditioner. It is a circuit diagram which shows the cooling circuit of the cooling device of 3rd Example of this invention, the ventilation unit case, blower, etc. of an air conditioner. It is a circuit diagram which shows the cooling circuit of the cooling device of 4th Example of this invention, the ventilation unit case, blower, etc. of an air conditioner. It is a flowchart of control of the cooling device of a 4th Example. It is a circuit diagram which shows the cooling circuit of the cooling device of the 5th Example of this invention. It is a flowchart of control of the cooling device of a 5th Example. It is a circuit diagram which shows the cooling circuit of the cooling device of 6th Example of this invention, the ventilation unit case, blower, etc. of an air conditioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cooling device 10 Air conditioner 15 Evaporator 16 Blower 30 Heat absorption part 40 Heat radiation part 50 Pump 100 Car-mounted electronic device

Claims (11)

A cooling device for cooling a cooling object (100) mounted on a vehicle in cooperation with a vehicle air conditioner (10) having a refrigeration cycle for compressing and expanding a first heat medium,
The evaporator (15) included in the air conditioner (10) includes a plurality of tubes arranged in parallel through which the first heat medium circulates, and the first heat medium distributed and assembled to the plurality of tubes. A tank part (15c) connected to the ends of the plurality of tubes, and the air blown by the blower (16) of the air conditioner (10) exchanges heat with the first heat medium. The cooling device is
A liquid second heat medium;
A conduit (60) through which the second heat medium circulates and circulates;
An endothermic part (30) in which heat is transferred from the object to be cooled (100) to the second heat medium; and
A heat radiating section (40) in which heat is transferred from the second heat medium to the evaporator (15);
A pump (50) for circulating the second heat medium,
The cooling device, wherein the heat radiating part (40) is coupled to the tank part (15c) of the evaporator (15).   The cooling device according to claim 1, wherein the second liquid heat medium is a brine having a freezing point of less than 0 ° C.   The said heat radiating part (40) is a different body from the said evaporator (15), Comprising: It attaches to the tank part (15c) of the said evaporator, and is couple | bonded, The Claim 1 or 2 characterized by the above-mentioned. Cooling system. It is a cooling device as described in any one of Claims 1-3 which comprises a some thermal radiation part (40),
The evaporator (15) has a plurality of tank portions (15b, 15c) connected to both ends of the tube, and the plurality of heat radiating portions (40) are coupled to the plurality of tank portions (15b, 15c). A cooling device characterized by that.   A temperature sensor (70) for detecting the temperature (Tb) of the second heat medium, and when the temperature (Tb) detected by the temperature sensor (70) reaches a predetermined temperature (T1), the air conditioner ( The cooling device according to any one of claims 1 to 4, further comprising a control device (80) for actuating the blower (16) of 10).   The air conditioner (10) includes a blower unit case (17) that houses the evaporator (15) and the blower (16) and has an exhaust heat outlet (25) that can be opened and closed, and the control device (80 The cooling device according to claim 5, characterized in that it controls to open the exhaust heat outlet (25) when it operates the blower (16).   When the temperature (Tb) detected by the temperature sensor (70) falls below a predetermined temperature (T3), the control device (80) reduces the flow rate of the liquid second heat medium. 7. Cooling device according to claim 5 or 6, characterized in that the pump (50) is controlled.   The cooling device according to claim 7, further comprising a flow rate adjusting valve, wherein the control device (80) controls the flow rate adjusting valve instead of the pump (50).   A second temperature sensor (72) for detecting the temperature (Tk) of the heat absorbing part (30) is further provided, and the pipe line (60) through which the liquid second heat medium circulates includes the heat absorbing part ( 30) and a switching valve (62) provided at a branch portion of the bypass pipe (61), and a temperature (Tb) detected by the temperature sensor (70) is provided. When the temperature becomes equal to or lower than a predetermined temperature (T3), the liquid second heat medium bypasses the heat absorption part (30) and flows through the bypass pipe (61), and the second temperature sensor. When the temperature (Tk) detected in (72) becomes equal to or higher than another predetermined temperature (T5), the control device (80) switches the switching so that the second heat medium flows to the heat absorption part (30). 7. Cooling according to claim 5 or 6, characterized in that the valve (62) is switched. Location. A temperature sensor (70) for detecting the temperature (Tb) of the second heat medium, and when the temperature (Tb) detected by the temperature sensor (70) reaches a predetermined temperature (T1), the air conditioner ( The cooling device according to any one of claims 1 to 4, further comprising a control device (80) for operating the blower (16) of 10).
The air conditioner (10) includes a blower unit case (17) that houses the evaporator (15) and the blower (16) and has an exhaust heat outlet (25) that can be opened and closed,
The blower unit case (17) includes an outside air introduction port (19) and an inside air introduction port (18), and an inside / outside air switching door (20) for opening and closing the outside air introduction port (19) and the inside air introduction port (18). When the temperature (Tb) detected by the temperature sensor (70) reaches the predetermined temperature (T1) while the vehicle is traveling at a predetermined speed or higher, the control device (80) causes the internal / external air switching door (20 ) Is switched so that air is introduced from the outside air inlet (19) and the exhaust heat outlet (25) is controlled to be opened.   The cooling device according to any one of claims 1 to 10, wherein the cooling object (100) is an on-board electronic device (100).

Images