JP2012140060A - Cooling system - Google Patents

Abstract

An electric device is cooled without deteriorating the mounting property on a vehicle.
A cooling device includes a compressor for circulating a refrigerant, a first condenser for condensing the refrigerant, a second condenser provided on the downstream side of the first condenser, and a second condenser. 42, an evaporator 80 for cooling the interior of the vehicle using the refrigerant from the vehicle 42, and a refrigerant path that circulates from the first capacitor 40 to the second capacitor 42. And a cooling unit 120 for cooling the electrical equipment.
[Selection] Figure 1

Description

  The present invention relates to a cooling device for an electric device mounted on a vehicle using a rotating electrical machine as a drive source, and more particularly to a cooling device that cools the electric device using an air conditioning refrigeration cycle system.

  In recent years, attention has been focused on hybrid vehicles, fuel cell vehicles, electric vehicles, and the like that travel with the driving force of a motor as one of countermeasures for environmental problems.

  In such a vehicle, electric devices such as a motor, a generator, an inverter, a converter, and a battery generate heat when power is transmitted and received, and it is necessary to cool these electric devices. In this case, it is conceivable to provide a cooling system that circulates cooling water between the electrical equipment and the radiator as in a normal vehicle that uses only the engine. Since it is necessary to provide a dedicated radiator, vehicle mountability may be lowered.

  In view of such a problem, Japanese Patent Application Laid-Open No. 2006-290254 (Patent Document 1) discloses a cooling system for a hybrid vehicle that can improve assemblability, reduce costs, and reduce size by sharing components. . This cooling system includes a compressor capable of sucking and compressing gas refrigerant, a main condenser capable of cooling with ambient air for condensing high-pressure gas refrigerant, and an evaporator capable of cooling a refrigerant by evaporating a low-temperature liquid refrigerant. And a pressure reducing means, wherein a heat exchanger capable of absorbing heat from the motor and a second pressure reducing means are connected in parallel to the pressure reducing means and the evaporator.

  According to the cooling system disclosed in the above publication, the manufacturing cost can be reduced by improving the assemblability by sharing the components. Moreover, size reduction can be achieved.

JP 2006-290254 A

  However, when two evaporators and a heat exchanger capable of absorbing heat from a motor are connected in parallel as in the cooling system described in Patent Document 1 described above, refrigerant is supplied to each of the evaporator and the heat exchanger. However, it is necessary to reduce the pressure to a complete gas. Therefore, there is a problem that the power performance required for the compressor used for cooling is increased. In addition, there is a problem that if the compressor is enlarged, the fuel consumption is deteriorated, and if the capacitor is enlarged for improving the compressor power, the mountability is deteriorated.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a cooling device that cools an electric device without deteriorating required compressor power and mountability on a vehicle. is there.

  A cooling device according to an aspect of the present invention is a cooling device for cooling an electric device mounted on a vehicle. The cooling device includes a compressor for circulating the refrigerant, a first condenser for condensing the refrigerant, a second condenser provided on the downstream side of the first condenser, and a refrigerant from the second condenser. An evaporator for cooling the room, and a cooling unit provided on the path of the refrigerant that circulates from the first capacitor to the second capacitor, and for cooling the electrical equipment using the refrigerant from the first capacitor Including.

  Preferably, the cooling device includes a first passage for introducing the refrigerant from the first condenser to the cooling part, and a second passage for introducing the refrigerant from the cooling part to the second condenser. The path of the refrigerant that circulates from the first capacitor toward the second capacitor is a path that passes through the first passage, the cooling unit, and the second passage.

More preferably, the first capacitor and the second capacitor are integrally disposed.
More preferably, the first capacitor and the second capacitor are arranged separately.

  More preferably, the first condenser condenses the refrigerant so as to be in one of a first state in which the refrigerant from the compressor is liquefied and a second state in which the vaporized refrigerant and the liquefied refrigerant are mixed. . The second capacitor reduces the temperature of the liquefied refrigerant.

  More preferably, a 1st capacitor | condenser condenses a refrigerant | coolant so that the temperature of a refrigerant | coolant may be in the state below the temperature required in order to cool an electric equipment. The second condenser condenses the refrigerant so as to be in one of a first state in which the refrigerant from the cooling unit is liquefied and a second state in which the vaporized refrigerant and the liquefied refrigerant are mixed.

  More preferably, a valve is provided between the second condenser and the evaporator for supplying mist refrigerant to the evaporator when cooling is performed.

  According to the present invention, by providing a cooling unit for cooling the electric device on the path of the refrigerant that circulates from the first capacitor to the second capacitor, the electric device is made using the liquid-phase refrigerant that circulates from the first capacitor. Can be cooled. For this reason, it is not necessary to reduce the pressure of the refrigerant to the complete gas in the cooling unit as in the case of the evaporator. Therefore, it is not necessary to increase the power performance of the compressor as compared with the case of reducing the pressure of the refrigerant supplied to the cooling unit to the complete gas. As a result, it is possible to avoid increasing the size of the compressor and providing a dedicated pump for cooling the electrical equipment. Therefore, it is possible to provide a cooling device that cools the electric device without deteriorating the compressor power requirement and the mountability to the vehicle.

It is a figure which shows the whole structure of the cooling device which concerns on this Embodiment. It is a figure which shows an example of the internal structure of the 1st capacitor | condenser and 2nd capacitor | condenser in this Embodiment. It is a figure for demonstrating operation | movement of the cooling device which concerns on this Embodiment. It is a figure which shows the whole structure of the cooling device which concerns on the modification of this Embodiment. It is a figure which shows an example of the internal structure of the 1st capacitor | condenser and the 2nd capacitor | condenser in the modification of this Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  A cooling device 10 according to the present embodiment shown in FIG. 1 cools an electric device mounted on a vehicle using a rotating electrical machine as a drive source. Examples of the vehicle using the rotating electric machine as a drive source include an electric vehicle, a fuel cell vehicle, and a hybrid vehicle.

  In the present embodiment, “electric equipment” will be described using, for example, an inverter 122 for converting DC power into AC power and a motor generator 124 that is a rotating electrical machine. In the following description, these electric devices may be simply referred to as “electric devices”.

  The battery is a secondary battery such as a lithium ion battery or a nickel metal hydride battery. A capacitor may be used instead of the battery.

  In addition, when there are a plurality of electrical devices to be cooled, it is desirable that the plurality of electrical devices have a common temperature range to be cooled. The target temperature range for cooling is a temperature range suitable as a temperature environment for operating the electrical equipment.

  The cooling device 10 according to the present embodiment includes a compressor 20, a first capacitor 40, a second capacitor 42, an evaporator 80, an expansion valve 150, a cooling unit 120, and an ECU (Electronic Control Unit) 400. Including.

  The cooling unit 120 is provided on the path of the refrigerant that circulates from the first capacitor 40 to the second capacitor 42, and cools the electrical device using the refrigerant that circulates from the first capacitor 40.

  Specifically, one end of the first connection passage 302 is connected to the outlet 46 of the first capacitor 40. The other end of the first connection passage 302 is connected to the cooling unit 120. The refrigerant in the first capacitor 40 flows to the cooling unit 120 via the first connection passage 302.

  One end of the second connection passage 304 is connected to the cooling unit 120. The other end of the second connection passage 304 is connected to the inlet 48 of the second capacitor 42. The refrigerant in the cooling unit 120 flows to the second capacitor 42 via the second connection passage 304.

  That is, the refrigerant path flowing from the first capacitor 40 to the second capacitor 42 is a path that passes through the first connection passage 302, the cooling unit 120, and the second connection passage 304.

  The evaporator 80 and the compressor 20 are connected by a third connection passage 306. The compressor 20 and the first capacitor 40 are connected by a fourth connection passage 308. Further, the second capacitor 42 and the evaporator 80 are connected by a fifth connection passage 310.

  The compressor 20 operates using a motor mounted on the vehicle as a power source, sucks and compresses the gaseous refrigerant flowing from the evaporator 80 via the third connection passage 306 during operation, and discharges it to the fourth connection passage 308. The compressor 20 operates based on a control signal C1 from the ECU 400. In addition, the compressor 20 may use an engine as a power source.

  Cooling of the interior of the vehicle using the evaporator 80 is performed, for example, when a switch for performing cooling is turned on. Alternatively, the cooling of the interior of the vehicle using the evaporator 80 is performed when the automatic control mode for automatically adjusting the temperature of the interior of the vehicle to the set temperature is selected, and the temperature in the interior of the vehicle is Is performed when the temperature is higher than the set temperature.

  As shown in FIG. 2, the 1st capacitor | condenser 40 and the 2nd capacitor | condenser 42 are arrange | positioned integrally. The first condenser 40 and the second condenser 42 that are integrally disposed are provided, for example, adjacent to an engine cooling radiator mounted on the vehicle, and are supplied with cooling air and cooling air supplied from a vehicle running air or a cooling fan. Exchange heat with

  The first capacitor 40 radiates the refrigerant compressed in the compressor 20 to mix the first state in which the refrigerant flowing from the compressor 20 is liquefied and the vaporized refrigerant (saturated vapor) and the liquefied refrigerant (saturated liquid). The refrigerant is condensed (liquefied) so as to be in one of the second states.

  The first condenser 40 includes a plurality of tubes 60 that circulate the refrigerant, and a plurality of fins 62 for exchanging heat between the refrigerant in the plurality of tubes 60 and the air around the first condenser 40.

  The plurality of tubes 60 are arranged in parallel between the inlet portion 44 for introducing the refrigerant from the compressor 20 and the outlet portion 46 connected to the cooling portion 120. The refrigerant introduced from the inlet 44 is distributed and distributed in each of the plurality of tubes 60.

  The plurality of fins 62 are disposed between the inlet portion 44 and the outlet portion 46 and adjacent to each other between the plurality of tubes 60. In each of the plurality of tubes 60, the refrigerant is condensed by heat exchange with the air around the first condenser 40 via the fins 62. The refrigerant after being condensed in the first capacitor 40 flows from the outlet 46 to the cooling unit 120.

  The specification of the first capacitor 40 (that is, the size of the tube 60 and the fin 62 or the heat dissipation performance) is that the temperature of the liquid-phase refrigerant after passing through the first capacitor 40 is the temperature required to cool the electric device. It is desirable to be set so as to decrease. It is desirable that the temperature required for cooling the electric device is a temperature lower than the upper limit value of the target temperature range as at least the temperature range of the electric device.

  In addition, the specification of the first capacitor 40 is preferably determined so that the refrigerant in the outlet 46 is in a state where the gas-phase refrigerant and the liquid-phase refrigerant are mixed or in a state of a liquid-phase refrigerant with a small degree of supercooling. desirable.

  The second capacitor 42 further cools the refrigerant flowing through the cooling unit 120 and lowers the temperature of the refrigerant (supercools). The second condenser 42 includes a plurality of tubes 66 through which the refrigerant flows, and fins 68 for exchanging heat between the refrigerant in the plurality of tubes 66 and the air around the second condenser 42.

  The plurality of tubes 66 are arranged in parallel between the inlet portion 48 for introducing the refrigerant from the cooling portion 120 and the outlet portion 50 connected to the evaporator 80. The refrigerant introduced from the inlet 48 is distributed and distributed in each of the plurality of tubes 66.

  The plurality of fins 68 are disposed between the inlet portion 48 and the outlet portion 50 and adjacent to each other between the plurality of tubes 60. In each of the plurality of tubes 66, the refrigerant is cooled by heat exchange with the air around the first condenser 40 via the fins 62. The refrigerant after being cooled in the second condenser 42 flows from the outlet 50 to the evaporator 80.

  The specification of the second capacitor 42 (that is, the size of the tubes 66 and the fins 68 or the heat dissipation performance) is such that the heat dissipation amount of the refrigerant until it passes through the cooling unit 120 at least in an environment at a predetermined outside temperature is a predetermined amount. It is desirable to be determined to be the above.

  Returning to FIG. 1, the expansion valve 150 is expanded by injecting a high-temperature / high-pressure liquid refrigerant flowing through the fifth connection passage 310 from a small hole to change it into a low-temperature / low-pressure mist refrigerant. It is a valve. The expansion valve 150 includes a valve main body 152 provided at a position upstream of the evaporator 80 and a temperature sensitive member 154 provided at a position downstream of the evaporator 80.

  In the expansion valve 150, the flow rate of the refrigerant in the valve main body 152 is determined according to the temperature of the refrigerant in the temperature sensitive member 154. The flow rate of the refrigerant is determined so that all of the refrigerant changed into a mist is completely vaporized in the evaporator 80.

  In the expansion valve 150, for example, the flow rate of the refrigerant by moving the valve body of the valve main body 152 using the change in the pressure of the gas according to the temperature of the refrigerant in the temperature-sensitive member 154 in which the gas is sealed inside the container. Is determined. The relationship between the temperature of the refrigerant and the amount of movement of the valve body is adjusted in advance according to the size of the container or the amount of gas.

  The evaporator 80 absorbs the heat of the air in the vehicle interior introduced so as to come into contact with the evaporator 80 when the mist refrigerant evaporates. The air whose temperature has decreased due to heat absorption is returned to the vehicle interior to cool the vehicle interior.

  The evaporator 80 includes a tube through which the refrigerant flows, and fins for exchanging heat between the refrigerant flowing through the tube and the air around the evaporator 80. A mist-like refrigerant circulates in the tube. As the refrigerant circulating in the tube evaporates, the heat of the air in the vehicle interior is absorbed through the fins. The vaporized refrigerant flows through the third connection passage 306 to the compressor 20. The structure of the evaporator 80 is basically the same as that of the first capacitor 40 or the second capacitor 42 except for the size or shape, and therefore the detailed description thereof will not be repeated.

  Cooling unit 120 includes an inverter 122, a motor generator 124, and a cooling passage 126. Both ends of the cooling passage 126 are connected to the other end of the first connection passage 302 and one end of the second connection passage 304, respectively.

  Cooling unit 120 is provided so that heat can be exchanged between inverter 122 and motor generator 124 and the refrigerant. In the present embodiment, for example, cooling unit 120 has a structure capable of exchanging heat between the electric device and the refrigerant by cooling passage 126 formed so that the refrigerant contacts the housing of the electric device. As will be described, the cooling unit 120 has a structure in which the heat exchanger and the refrigerant can be brought into contact with each other when the electric device and the heat exchanger are connected via heat transfer means such as a heat pipe. It may be.

  In the present embodiment, cooling unit 120 may form cooling passage 126 so as to cool motor generator 124 after cooling inverter 122, or motor generator 124 after cooling motor generator 124. The cooling passage 126 may be formed so as to cool the inverter, or the cooling passage 126 may be formed so as to cool the inverter 122 and the motor generator 124 in parallel. Preferably, the cooling unit 120 cools the electrical device with the lower upper limit value of the target temperature range among the electrical devices to be cooled, and then the electrical device with the higher upper limit value of the target temperature range. It is desirable to provide cooling.

  Cooling passage 126 has a portion adjacent to each housing of inverter 122 and motor generator 124. Heat exchange can be performed between the refrigerant flowing through the cooling passage 126 and the inverter 122 and the motor generator 124 in this portion.

  ECU 400 generates control signal C1 and transmits it to compressor 20 in order to operate compressor 20 when cooling is performed.

  The operation of the cooling device 10 according to the present embodiment having the above configuration will be described. For example, when the switch for cooling is turned on or when the automatic control mode for automatically adjusting the temperature in the vehicle interior to the set temperature is selected, and the temperature in the vehicle interior Cooling is performed when is higher than the set temperature. At this time, ECU 400 transmits a control signal C1 so that compressor 20 operates. The compressor 20 operates based on a control signal C1 from the ECU 400.

  The refrigerant discharged from the compressor 20 by the operation of the compressor 20 is introduced into the first condenser 40 via the fourth connection passage 308. The refrigerant introduced into the first condenser 40 is condensed by exchanging heat with the outside air via the fins 62 when being distributed and distributed in each of the plurality of tubes 60, and a part or all of the refrigerant is liquefied. . In addition, when the refrigerant | coolant in the 1st capacitor | condenser 40 is the state which part or all of the refrigerant | coolant condensed has liquefied, the temperature of a refrigerant | coolant is maintained at a constant temperature. The refrigerant condensed in the first condenser 40 is supplied to the cooling unit 120 via the first connection passage 302.

  The refrigerant supplied to the cooling unit 120 cools the inverter 122 and the motor generator 124 and then flows to the second capacitor 42 via the second connection passage 304. Among the refrigerants introduced into the second condenser 42, the liquefied refrigerant is cooled by exchanging heat with the outside air via the fins 68 when being distributed and distributed in each of the plurality of tubes 66. Be made. That is, the degree of supercooling is greater than when the refrigerant is a saturated liquid.

  The refrigerant cooled in the second condenser 42 flows to the expansion valve 150 via the fifth connection passage 310. The liquid phase refrigerant is changed into a mist refrigerant by the expansion valve 150 and supplied to the evaporator 80. In the evaporator 80, the mist refrigerant absorbs the heat of the air in the vehicle interior by evaporation. The vapor-phase refrigerant evaporated by evaporation flows through the third connection passage 306 and then flows to the compressor 20. The gas-phase refrigerant compressed in the compressor 20 flows through the first capacitor 40 and is condensed again by being dissipated in the first capacitor 40. In this manner, the refrigerant flows from the compressor 20 in the order of the first condenser 40, the cooling unit 120, the second condenser 42, and the evaporator 80, and then circulates to the compressor 20.

  FIG. 3 shows an example of a change in the temperature of the refrigerant flowing through the second capacitor 42. In FIG. 3, the vertical axis represents the refrigerant temperature. The horizontal axis indicates the flow distance from the inlet portion 48 to the outlet portion 50 of the second capacitor 42.

  It is assumed that the temperature of the refrigerant that has flowed to the inlet 48 of the second condenser 42 via the cooling unit 120 is, for example, 60 ° C. and the outside air temperature is 30 ° C.

  As shown by the solid line in FIG. 3, the temperature of the refrigerant flowing through the inlet portion 48 of the second capacitor 42 decreases as it approaches the outlet portion 50 by heat radiation from the plurality of tubes 66 through the plurality of fins 68. In the exit part 50, it falls to 30 degreeC which is the same as external temperature.

  On the other hand, in the case where the refrigerant that has circulated through the first capacitor 40 circulates in the second capacitor 42 without passing through the cooling unit 120, the cooling unit 120 does not absorb heat from the electrical device, and therefore has a temperature lower than 60 ° C. For example, 50 ° C. refrigerant flows through the second capacitor 42.

  As shown by the broken line in FIG. 3, the temperature of the refrigerant flowing through the inlet portion 48 of the second capacitor 42 decreases as it approaches the outlet portion 50 by heat radiation from the plurality of tubes 66 through the plurality of fins 68. In front of the outlet 50, the temperature drops to 30 ° C., the same as the outside temperature.

  The amount of heat release in the second capacitor 42 can be calculated by multiplying the difference between the refrigerant temperature and the outside air temperature by a coefficient. That is, the heat dissipation amount of the second capacitor 42 when passing through the cooling unit 120 is larger than the heat dissipation amount not passing through the cooling unit 120 by an amount corresponding to the region shown by the hatching in FIG.

  As described above, according to the cooling device according to the present embodiment, the cooling unit for cooling the electrical equipment is provided on the path of the refrigerant flowing from the first capacitor 40 to the second capacitor 42, so that the first The electric device can be cooled using the refrigerant flowing from the capacitor 40. Therefore, it is not necessary to depressurize the refrigerant to the complete gas in the cooling unit 120 similarly to the evaporator 80. Therefore, it is necessary to increase the power performance of the compressor as compared with the case where the refrigerant supplied to the cooling unit is depressurized to the complete gas. Disappear. As a result, it is possible to avoid increasing the size of the compressor and providing a dedicated pump for cooling the electrical equipment. Therefore, it is possible to provide a cooling device that cools the electric device without deteriorating the compressor power requirement and the mountability to the vehicle.

  The refrigerant in the first condenser 40 is in a state where a saturated liquid state and a saturated vapor state are mixed. Since the temperature of the refrigerant at this time is kept constant, the difference from the outside air temperature is also kept constant. As a result, the first capacitor 40 can maintain a constant heat radiation amount.

  On the other hand, the temperature of the refrigerant in the second capacitor 42 decreases due to overcooling. At this time, since the difference between the refrigerant temperature and the outside air temperature is reduced, the heat dissipation amount of the second capacitor 42 is reduced as compared with the case where the refrigerant temperature is maintained at a constant temperature.

  Therefore, by increasing the temperature of the refrigerant via the cooling unit 120, the heat radiation amount in the second capacitor 42 can be increased as compared with the case where it does not pass through the cooling unit. That is, the heat received from the cooling unit 120 can be radiated without increasing the size of the second capacitor 42.

  Although the inverter 122 and the motor generator 124 have been described as examples of the “electric device” mounted on the vehicle to be cooled using the cooling device 10 in the present embodiment, the “electric device” particularly includes these. It is not limited, and any electrical device that generates heat by operation may be used. For example, the “electric device” includes an inverter, a motor generator 124, a battery as a power storage device, a converter for boosting the voltage of the battery, and a DC / DC converter for stepping down the voltage of the battery. It may be at least one of them.

  In the present embodiment, the first capacitor 40 and the second capacitor 42 have been described as two capacitors being integrally disposed. However, the first capacitor 40 and the second capacitor 42 are not particularly limited to being integrally disposed. For example, as shown in FIG. 4, the first capacitor 40 and the second capacitor 42 may be arranged separately.

  In the present embodiment, the case where the electric device is cooled by the cooling unit 120 when cooling is described as an example. For example, the temperature of the electric device or the temperature of the refrigerant flowing through the cooling unit 120 is determined in advance. The ECU 400 may operate the compressor 20 when the temperature is higher than the given temperature.

  In the present embodiment, the first capacitor 40 and the second capacitor 42 have been described as having a structure in which a plurality of tubes are arranged in parallel. However, the present invention is not particularly limited to such a structure. For example, as shown in FIG. 5, the first capacitor 40 may have a structure in which a continuous path through which the refrigerant flows is formed by a single tube 70 from the inlet portion 44 to the outlet portion 46. The second capacitor may have a structure in which a continuous path through which the refrigerant flows is formed by a single tube 72 from the inlet 48 to the outlet 50.

  Further, the specification of the first condenser 40 may be determined so that the vaporized refrigerant flowing from the compressor 20 can be completely liquefied in the first condenser 40.

  Further, in the present embodiment, the first condenser 40 condenses the vaporized refrigerant flowing from the compressor 20 so that the vaporized refrigerant is liquefied in the first condenser 40 or the vaporized refrigerant and the liquefied refrigerant are mixed. After that, it has been described that the refrigerant liquefied in the second capacitor 42 is supercooled, but the present invention is not particularly limited to this. For example, the first capacitor 40 condenses the refrigerant so that the temperature of the refrigerant is equal to or lower than the temperature required for cooling the electrical equipment, and the second capacitor 42 liquefies the refrigerant from the cooling unit 120. Alternatively, the refrigerant may be condensed so that the vaporized refrigerant and the liquefied refrigerant are mixed.

  Further, the expansion valve 150 may include a sensor that detects the temperature of the refrigerant and an electromagnetic valve. In this case, ECU 400 may adjust the flow rate of the refrigerant in the solenoid valve according to the temperature of the refrigerant detected by the sensor.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 10 Cooling device, 20 Compressor, 40, 42 Condenser, 44, 48 Inlet part, 46, 50 Outlet part, 60, 66, 70, 72 Tube, 62, 68 Fin, 80 Evaporator, 120 Cooling part, 122 Inverter, 124 Motor Generator, 126 Cooling passage, 150 Expansion valve, 152 Valve body, 154 Temperature sensitive member, 302, 304, 306, 308, 310 Connection passage.

Claims (7)

A cooling device for cooling electrical equipment mounted on a vehicle,
A compressor for circulating the refrigerant;
A first condenser for condensing the refrigerant;
A second capacitor provided downstream of the first capacitor;
An evaporator for cooling the interior of the vehicle using the refrigerant from the second capacitor;
A cooling device provided on a path of the refrigerant flowing from the first capacitor toward the second capacitor and configured to cool the electrical device using the refrigerant from the first capacitor. . The cooling device is
A first passage for introducing the refrigerant from the first capacitor to the cooling unit;
A second passage for introducing the refrigerant from the cooling section to the second condenser,
2. The cooling device according to claim 1, wherein a path of the refrigerant flowing from the first capacitor toward the second capacitor is a path that passes through the first passage, the cooling unit, and the second passage.   The cooling device according to claim 1 or 2, wherein the first capacitor and the second capacitor are integrally disposed.   The cooling device according to claim 1 or 2, wherein the first capacitor and the second capacitor are arranged separately. The first condenser is configured to cause the refrigerant to be in one of a first state in which the refrigerant from the compressor is liquefied and a second state in which the vaporized refrigerant and the liquefied refrigerant are mixed. Condensed,
The cooling device according to claim 1, wherein the second capacitor reduces the temperature of the liquefied refrigerant. The first condenser condenses the refrigerant so that the temperature of the refrigerant is equal to or lower than a temperature required for cooling the electric device;
The second capacitor is configured to be in one of a first state in which the refrigerant from the cooling unit is liquefied and a second state in which the vaporized refrigerant and the liquefied refrigerant are mixed. The cooling device according to claim 1, wherein the cooling device is condensed.   The cooling according to any one of claims 1 to 6, wherein a valve is provided between the second condenser and the evaporator for supplying the mist-like refrigerant to the evaporator when the cooling is performed. apparatus.

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