JPH07190394A - Heat carrier device - Google Patents

Abstract

PURPOSE:To largely increase a capacity to transfer heat by constituting a heat carrier device which is used for heating by heating refrigerants with a plate material which is connected with a liquid receiver by way of a second refrigerant heater and an on/off valve and eliminating a time lag in starting pressure reduction and shortening an opening/closing cycle. CONSTITUTION:This device forms a vapor-liquid separator 1 which is installed to the upper part of a refrigerant heater 2 and connected with the refrigerant heater 2 by way of an inlet pipe 3 and an outlet pipe 4 and a heat carrier unit 18 which is installed to the upper part of the vapor-liquid separator 1 and connects the inlet pipe 3 with a second refrigerant heater 20, an on/off valve 8, a liquid receiver 5, a first check valve 6 and the liquid-vapor separator 1 and a ring-shaped circulation pipe 19 which connects the vapor-liquid separator 1, a radiator 10, a second check valve 12 and the liquid receiver 5 one after another. This formation introduces superheated gas refrigerants to the liquid receiver 5 and heats up the liquid receiver 5 to a higher temperature and emits a large amount of heat, thereby lowering the temperature of the gas refrigerant quickly. As a result, the refrigerant pressure in the liquid receiver drops dramatically, thereby opening or closing the on/off valve 8 and absorbing the liquid refrigerants into the liquid receiver all at once simultaneously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat transfer device for utilizing heat for heating or the like by utilizing a pressure increase when heating a refrigerant.

[0002]

2. Description of the Related Art A conventional heat transfer device is disclosed, for example, in Japanese Patent Laid-Open No.
As shown in Japanese Patent Publication No. 51631, the structure is as shown in FIG.

That is, the gas-liquid separator 1 is disposed above the refrigerant heater 2 and is connected by an inlet pipe 3 of the refrigerant heater 2 and an outlet pipe 4 of the refrigerant heater 2 and connected by an annular pipe line. Has been done. Further, the liquid receiver 5 is arranged above the gas-liquid separator 1, is connected to the gas-liquid separator 1 by a drop pipe 7 having a first check valve 6, and is further discharged by a pressure equalizing pipe 9 having an opening / closing valve 8. It is connected to the gas-liquid separator 1 via a pipe 4. The gas-liquid separator 1 and the radiator 10 arranged on the indoor side as the use side are connected by a gas refrigerant forward pipe 11, and the radiator 10 and the liquid receiver 5 are liquid refrigerant return pipes having a second check valve 12. Connected at 13. As described above, the gas-liquid separator 1, the radiator 10, the second check valve 12, the liquid receiver 5, and the first check valve 6 form an annular circulation path sequentially connected by piping. Reference numeral 14 is a temperature detector provided in the outlet pipe 4 of the refrigerant heater 2, and 15 is a control device for controlling the opening / closing time of the opening / closing valve 8 according to the temperature detected by the temperature detector 14. Reference numeral 16 is a burner provided in the refrigerant heater 2, and the burner 16 heats the refrigerant. Reference numeral 17 is a blower provided in the radiator 10.

The operation of the above structure will be described below. In the refrigerant heater 2, the refrigerant heated by the combustion heat of the burner 16 flows into the gas-liquid separator 1 through the outlet pipe 4 in a two-phase state of gas and liquid, and the liquid refrigerant is heated again from the inlet pipe 3 by the refrigerant heating. Flows into the vessel 2. On the other hand, gas-liquid separator 1
Of the two-phase refrigerant that has flowed into the gas refrigerant, the gas refrigerant enters the radiator 10 through the gas refrigerant outflow pipe 11 and exchanges heat with the indoor air sent by the blower 17, dissipates heat and condenses into supercooled liquid.

When the on-off valve 8 is closed, the supercooled liquid refrigerant condensed and liquefied in the radiator 10 is returned to the liquid refrigerant return pipe 13.
Through the second check valve 12 to flow into the liquid receiver 5 by condensing the gas refrigerant. At this time, the pressure inside the liquid receiver 5 is lower than the pressure inside the gas-liquid separator 1, so the first check valve 6 is closed. In this state,
When the opening / closing valve 8 is opened, the liquid receiver 5 and the gas-liquid separator 1 communicate with each other through the pressure equalizing pipe 9 to be in a pressure equalizing state, and the liquid refrigerant in the liquid receiver 5 passes through the first check valve 6 by gravity. It flows into the gas-liquid separator 1.

Next, when the on-off valve 8 is closed again, the first check valve 6 is closed, and the liquid refrigerant condensed and supercooled in the radiator 10 into the liquid receiver 5 is stored in the liquid receiver 5. The cycle in which the liquid is sucked by the sudden pressure reduction and the liquid receiver 5 is filled with the liquid refrigerant is repeated. As described above, the natural circulation cycle between the gas-liquid separator 1 and the refrigerant heater 2 is based on the evaporated refrigerant pressure, and the supply of the liquid refrigerant from the liquid receiver 5 to the gas-liquid separator 1 and the refrigerant heater 2 is performed by the open / close valve 8 It is an intermittent operation cycle according to the open / close cycle of.

[0007]

In the above-mentioned conventional structure, the heat-transferring by the heating of the refrigerant is carried out. Therefore, the opening / closing operation cycle of the opening / closing valve 8 is set as shown in FIG. It was necessary to consider the time T _l . That is, vacuum-off valve 8 is the gas temperature in the delayed receiver 5 is within the receiver 5 to the heat dissipation time T _l from the time t ₁ has Tsu switched to the closed state from the open state is lowered occurs, The liquid receiver 5 is filled with the liquid refrigerant in the depressurization time _Tr , and the depressurization is completed. The depressurization start delay time T _l is mainly due to the heat capacity of the container of the liquid receiver 5. The depressurization time T _r is the time until the liquid refrigerant has finished flowing into the empty receiver 5 and depends on the internal volume of the receiver 5 and the flow path resistance from the radiator 10 to the receiver 5. Determined. Further, the opening time T _ON is the time required for the liquid refrigerant to drop from the liquid receiver 5 which is full to the gas-liquid separator 1, and the internal volume of the liquid receiver 5 and the pressure equalizing pipe 9 and the drop pipe 7 are set.
It is determined by the flow path resistance of.

[0008] closing period T _S of the thus-off valve 8 is the sum of the open time T _ON and the closing time _{T OFF (T S = T O} N + T OFF), further closing time T _OFF is vacuum start delay time T _It is the sum of _l and the depressurization time T _r (T _OFF = T _l + T _r ). Since this depressurization start delay time T _l is relatively large, there is a restriction on the reduction of the closing time T _OFF , and there is no choice but to set the opening / closing cycle T _{S to} be long, and the heat transfer amount (when used for heating is used. There was a constraint on increasing the heating capacity).

The present invention solves the above-mentioned drawbacks by providing a second refrigerant heater communicating with the inlet pipe and the on-off valve, and increasing the temperature of the refrigerant entering from the on-off valve to shorten the required decompression time. The purpose is to shorten the open / close cycle and increase the heat transfer capacity.

[0010]

In order to achieve the above object, the present invention provides a refrigerant heater and a gas which is disposed above the refrigerant heater and which communicates with the refrigerant heater through an inlet pipe and an outlet pipe. A liquid separator, a second refrigerant heater which is disposed above the gas-liquid separator and communicates with the inlet pipe and the opening / closing valve, and a receiver which communicates with the gas-liquid separator via the opening / closing valve and the first check valve. It comprises a heat transfer part having a liquid container, an annular circulation path in which the gas-liquid separator, the radiator, the second check valve and the liquid receiver are sequentially connected.

[0011]

According to the present invention, with the above structure, the superheated gas refrigerant heated to a high temperature by the second refrigerant heater is introduced to the on-off valve,
When the on-off valve is opened, the liquid receiver and the gas-liquid separator become the second
Of the heater and the open / close valve communicate with each other to equalize the pressure, and the liquid refrigerant in the liquid receiver flows into the gas-liquid separator through the first check valve due to gravity, and the liquid receiver has a high temperature superheated refrigerant gas. Is full. Next, when the on-off valve is closed, the receiver is at a higher temperature, so a large amount of heat is dissipated and the gas temperature in the receiver rapidly drops, so that the supercooled liquid refrigerant flows into the receiver promptly. Therefore, the internal gas is condensed by the supercooled refrigerant, the refrigerant pressure inside the receiver rapidly decreases, and the condensation of the gas refrigerant due to the suction of the low-temperature liquid refrigerant from the radiator is accelerated.

By eliminating the depressurization start delay time in this way, the closing time of the on-off valve is greatly shortened, the opening / closing cycle is shortened, and the number of times of sucking and dropping of the liquid receiver per unit time is increased to increase the refrigerant. By increasing the circulation amount and increasing the refrigerant heating amount, the heat transfer amount (heating capacity when used for heating) can be increased.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, the same reference numerals as those in FIG. 3 denote the same members and have the same functions, and therefore detailed description thereof will be omitted and different points will be mainly described.

Reference numeral 18 is a refrigerant heater 2 having a burner 16.
And the gas-liquid separator 1 are connected to the annular pipe line by the inlet pipe 3 and the outlet pipe 4, and the liquid receiver 5 provided above the gas-liquid separator 1 is
A drop pipe 7 having a first check valve 6, a communication passage 21 communicating from the inlet pipe 3 to the refrigerant heater 2 and from the second refrigerant heater 20 to the liquid receiver 5 via the on-off valve 8. On-off valve 8 and first
Liquid receiver 5 communicating with the gas-liquid separator 1 via the check valve 6
And a heat transfer part having a heat transfer part connected to the annular pipe line. Reference numeral 19 is an annular circulation path in which the gas-liquid separator 1, the radiator 10, the second check valve 12, and the liquid receiver 5 are sequentially connected by piping. A circulation path 19 is connected to the liquid receiver 5 via the second check valve 12. Reference numeral 23 is a combustion amount varying device for varying the combustion amount of the burner 16, and 24 is a control device electrically connected to the on-off valve 8, the temperature detector 14, and the combustion amount varying device 23.

In the above-mentioned structure, the heat transfer is performed by heating the refrigerant by the opening / closing operation of the opening / closing valve 8, the combustion in the burner 16 and the operation of the blower 17.

Here, when the on-off valve 8 is closed, the supercooled liquid refrigerant condensed and liquefied in the radiator 10 is returned to the liquid refrigerant return pipe 1.
From 3 through the second check valve 12, the gas refrigerant in the liquid receiver 5 is condensed to flow into the liquid receiver 5. This time,
Since the pressure inside the liquid receiver 5 is lower than the pressure inside the gas-liquid separator 1, the first check valve 6 is closed.
Then, the supercooled liquid refrigerant flows into the liquid receiver 5 from the circulation path 19, and when the liquid receiver 5 is filled with the liquid refrigerant, the on-off valve 8 is opened.
When is opened, the liquid receiver 5 and the gas-liquid separator 1 are communicated by the pressure equalizing pipe 9 so that the pressure is equalized, and the liquid refrigerant in the liquid receiver 5 passes through the first check valve 6 due to gravity. It flows into the liquid separator 1. At this time, in the gas refrigerant of the gas-liquid separator 1 that replaces the liquid refrigerant of the liquid receiver 5, the refrigerant superheated in the second heater 20 flows from the communication passage 21 to the liquid receiver 5 through the on-off valve 8. . When the on-off valve 8 is closed, the inlet pipe 3
The refrigerant that has entered the above is heated in the heater 1 and then accumulated in the second refrigerant heater 20 where it is overheated. Therefore, the refrigerant becomes a saturated state or a superheated state (superheat) from the liquid and becomes a high temperature equal to or higher than the saturation temperature. When the on-off valve 8 is opened, the superheated gas refrigerant heated to a high temperature by the second refrigerant heater 20 becomes
It passes through the communication passage 21 and is guided to the on-off valve 8 and enters the liquid receiver 5. The liquid receiver 5 and the gas-liquid separator 1 communicate with each other through the second heater 20 and the opening / closing valve 8 to be in a pressure equalizing state, and the liquid refrigerant in the liquid receiver 8 passes through the first check valve 6 due to gravity and is vaporized. The liquid separator 1 flows into the liquid separator 1 again, and the liquid receiver 8 is filled with the high-temperature superheated refrigerant gas.

Next, when the on-off valve 8 is closed, the receiver 5 is at a higher temperature, so a large amount of heat is dissipated, and the gas temperature in the receiver 5 is rapidly lowered. Since it flows into the liquid receiver 5, the internal gas is condensed by this supercooled refrigerant, the pressure of the refrigerant inside the liquid receiver 5 sharply drops, and the gas refrigerant generated by sucking the low-temperature liquid refrigerant from the radiator 10 Condensation is accelerated.

Therefore, the decompression in the liquid receiver 5 occurs due to the condensation of the gas refrigerant by the supercooled liquid refrigerant without delaying the start of the decompression, and the liquid refrigerant enters the liquid receiver 5 at the same time as the opening / closing valve 8 is closed. The cycle in which the liquid is sucked at once and the liquid receiver 5 is filled with the liquid refrigerant is repeated.

In the above heat transfer operation, the open / close valve 8 is closed.
A case where the opening operation is performed from the state will be described with reference to FIG.
In FIG. 2, the open / close valve 8 is switched from the open state to the closed state.
Time t_OAt the same time, the hot gas refrigerant inside the receiver 5 is cooled.
By being rejected and condensed, the decompression inside the receiver instantly opens.
Start, decompression start delay time T_l'Is practically eliminated (T _l'
= 0) is possible. Therefore, the closing time T of the on-off valve 8_OFF'
Is the net decompression time T_rJust good (T_OFF'= T_r), Opening and closing
Cycle T_S'Is significantly shortened (T_S'= T_r+ T_ON)it can. Well
Also, since the gas refrigerant entering the receiver 8 has a high temperature,
Is large and the inflow mass is small. Therefore, in one cycle
The amount of liquid refrigerant from the radiator 10 sucked into the liquid receiver 5 during depressurization is
Increase.

As a result, suction of the liquid refrigerant in the receiver 5
The increase in the number of drops causes the refrigerant circulation capacity to increase, increasing the amount of combustion in the refrigerant heater 2 and increasing the heat transfer amount (heating capacity when used for heating). The drive input is not required, and the input of the on-off valve 8 is the only input of heat transfer, and the economical efficiency is not lost.

FIG. 5 shows another embodiment of the present invention.
The outlet pipe 4 and the second refrigerant heater 20 are communicated with each other, and the second refrigerant heater 20 is communicated with the on-off valve 8 through the communication passage 22. Therefore, the saturated refrigerant that is heated in the heater 1 and has a large amount of gas is accumulated in the second refrigerant heater 20 from the outlet pipe 4 and superheated there, and the superheated vapor refrigerant is passed to the liquid receiver 5 through the communication passage 2
2. From the on-off valve 8. For this reason, since the liquid receiver 5 has a higher temperature, it radiates a larger amount of heat, the pressure of the refrigerant inside the liquid receiver 5 can be more rapidly lowered, and the heat transfer amount can be increased.
Since the saturated refrigerant becomes overheated with a little heating, the responsiveness is fast at the start-up, the transition period such as ON-0FF by the room thermostat, and the refrigerant becomes sufficiently overheated (superheat) and responsive. Since it is faster, the temperature can be set to a higher temperature, and the second heater has a small heating amount, so that a simple structure such as extending the communication pipe to bring it closer to the burner is possible.

FIG. 6 shows another embodiment of the present invention. In FIG. 6, reference numeral 25 denotes a container arranged above the refrigerant heater 2. The container 25 is divided into an upper liquid receiving portion 26 and a lower gas-liquid separate liquid storage portion 27 by a partition plate 28. . Refrigerant heater 2 and gas-liquid separate liquid reservoir 2
7 communicates with an inlet pipe 3 and an outlet pipe 4. Reference numeral 18 denotes a refrigerant heater 2 having a burner 16 and a gas-liquid separate liquid reservoir 2
7 is connected to the annular pipe, and is connected to the pipe provided with an on-off valve 31 between the liquid receiving part 26 and the gas-liquid separate liquid reservoir 27 and the annular pipe, and the inlet pipe 3 is connected to the refrigerant heater 2. It is a heat transfer unit having a communication passage 21 that communicates from the second refrigerant heater 20 to the liquid receiving unit 26 via the second opening / closing valve 29. Reference numeral 19 is a gas-liquid separator liquid reservoir 27, a radiator 10, a second check valve 1
2. An annular circulation path in which the liquid receiving portion 26 is sequentially connected by piping. The container 25 is formed integrally with the partition plate 28 by brazing, welding or the like after molding a metal such as iron aluminum, and the on-off valve 3
The reference numeral 1 is joined to or integrally formed with the partition plate 28 and is opened and closed by the valve shaft 32 of the valve drive unit 33. Reference numeral 23 is a combustion amount varying device for varying the combustion amount of the burner 16, 24 is an on-off valve 31, a second on-off valve 29, a temperature detector 14, a combustion amount varying device 23.
Is a control device electrically connected to.

In the above structure, when the on-off valve 31 and the second on-off valve 29 are opened, the liquid receiving portion 26 and the gas-liquid separate liquid storage portion 27 communicate with each other to establish a pressure equalizing state, and the inside of the liquid receiving portion 26 is opened. The liquid refrigerant flows by gravity into the gas-liquid separate liquid reservoir 27 through the on-off valve 31. At this time, the gas refrigerant that replaces the liquid refrigerant in the liquid receiving portion 26 at the same time is the gas-liquid separator liquid storage portion 27.
From the second heater 20 to the liquid receiving portion 26, the communication passage 21 from the second heater 20, and the superheated refrigerant gas from the second opening / closing valve 29. Next, when the on-off valve 31 and the second on-off valve 29 are closed again when all the liquid refrigerant in the liquid receiving section 26 flows, the liquid receiving section 26 causes the over-heated refrigerant gas flowing from the second on-off valve 29. Due to the high temperature, a large amount of heat is dissipated, and the gas temperature in the liquid receiving section 26 is rapidly lowered. Therefore, the liquid receiving portion 26 is instantly depressurized to a low pressure, and the liquid refrigerant condensed and cooled in the radiator 10 is sucked into the liquid receiving portion 26,
Is repeated with the liquid refrigerant. Here, in addition to the pressure equalizing pipe 9 in the conventional example, the gas passage of the shortest length is obtained by increasing the diameter of the on-off valve 31 so that the gas refrigerant is replaced at the same time as the liquid refrigerant drops from the on-off valve 31.
The drop pipe 7 has the shortest length because the opening / closing valve 8 is directly attached to the partition plate 28. Therefore, the flow path resistance of the gas refrigerant and the liquid refrigerant flowing through the open / close valve 8 becomes small, and the open / close valve 31
The liquid refrigerant in the liquid receiving portion 26 which becomes full at the same time as the opening is replaced with the gas refrigerant, and a large amount is dropped into the gas-liquid separate liquid storage portion 27. Therefore, the flow path resistance can be reduced, and the opening time T _ON of the open / close valve 31 can be significantly shortened.

When the open / close valve 31 is open, the second
Since the on-off valve 29 is opened to guide the superheated vapor refrigerant to the liquid receiving section 26 from the communication passage 22, the liquid receiving section 26 radiates a large amount of heat because it has a higher temperature, and the on-off valve 31 and the second on-off valve 26
When the valve is closed, the refrigerant pressure inside the liquid receiving section 26 can be more rapidly lowered, and immediately the supercooled liquid refrigerant flows into the liquid receiving section 26 from the second check valve 12, and the supercooled refrigerant causes the high temperature gas inside The refrigerant is cooled and condensed, and the refrigerant pressure inside the liquid receiving section 26 is drastically reduced, so that the low temperature liquid refrigerant is sucked from the radiator 10. Therefore, due to the condensation of the gas refrigerant by the supercooled liquid refrigerant, decompression in the liquid receiving section 26 occurs without a decompression start delay time, and the liquid refrigerant is sucked into the liquid receiving section 26 at the same time as the opening / closing valve 31 is closed. The cycle in which the liquid receiver 26 is filled with the liquid refrigerant is repeated. For this reason, there is no delay in decompression and the on-off valve 31
The closing time T _OFF of can be greatly shortened.

Therefore, the refrigerant circulation capacity is increased by increasing the number of times the liquid refrigerant is sucked and dropped in the liquid receiving portion 26, and the combustion amount in the refrigerant heater 2 is increased to increase the heat transfer amount (in the case of heating, heating is performed). Ability can be increased.

[0026]

As described above, according to the heat transfer device of the present invention, the refrigerant heater and the refrigerant heater disposed above the refrigerant heater are provided with the inlet pipe and the outlet pipe. A gas-liquid separator communicating with the gas-liquid separator, a second refrigerant heater disposed above the gas-liquid separator and communicating with the inlet pipe and the on-off valve, and the gas-liquid separator via the on-off valve and the first check valve. The following effects can be obtained because the heat transfer section having a liquid receiver communicating with, the gas-liquid separator, the radiator, the second check valve and the liquid receiver are sequentially connected to form an annular circulation path.

(1) The gas refrigerant overheated by the second refrigerant heater is guided to the liquid receiver, and the liquid receiver is heated to a higher temperature to radiate a large amount of heat, so that the gas temperature in the liquid receiver is rapidly lowered. Therefore, the pressure of the refrigerant inside the receiver rapidly decreases, and the opening / closing cycle is greatly shortened, so that the refrigerant circulation amount increases and the heat transfer amount can be increased.

(2) Further, the input of the heat transfer is only the input of the on-off valve, and the economical efficiency is not lost.

(3) By communicating the outlet pipe with the second refrigerant heater and communicating with the on-off valve through the communication passage, the liquid receiver has a higher temperature, so a larger amount of heat is dissipated, and the inside of the liquid receiver is radiated. The refrigerant pressure can be reduced more rapidly, and the heat transfer amount can be increased. Since the saturated refrigerant becomes overheated with a little heating, the response is quick even during the transition period, and it is possible to set a higher temperature, and the second heater has a small heating amount, so a simple configuration is possible. Becomes

(4) A container provided with a partition plate for partitioning the upper liquid receiving portion and the lower gas-liquid separator liquid reservoir portion and the second heater are connected to the liquid receiving portion via the second opening / closing valve. By providing such a valve, the flow path resistance can be reduced, the opening time T _{ON of the} on-off valve can be greatly shortened, the heat radiation amount of the liquid receiving section can be increased, and the decompression delay can be eliminated. Closing time T
_OFF can be greatly shortened. Therefore, the refrigerant circulation capacity increases due to an increase in the number of times the liquid refrigerant is sucked / dropped in the liquid receiving unit, which increases the combustion amount in the refrigerant heater and further increases the heat transfer amount (heating capacity when used for heating). Greater ability can be achieved.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a heat transfer device according to an embodiment of the present invention.

[Fig. 2] Decompression characteristic diagram of the liquid receiver

FIG. 3 is a system configuration diagram of a conventional heat transfer device.

FIG. 4 is a decompression characteristic diagram of a liquid receiver in a conventional heat transfer device.

FIG. 5 is a system configuration diagram of a heat transfer device according to another embodiment of the present invention.

FIG. 6 is a system configuration diagram of a heat transfer device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas-liquid separator 2 Refrigerant heater 5 Liquid receiver 6 First check valve 8 Open / close valve 10 Radiator 12 Second check valve 18 Heat transfer part 19 Circulation path 20 Second heater 21 Communication path 24 Control device 25 Container 26 liquid receiver 27 gas-liquid separator liquid reservoir 28 partition plate 29 second on-off valve 31 on-off valve

Claims (3)

[Claims] 1. A refrigerant heater, a gas-liquid separator which is arranged above the refrigerant heater and which communicates with the refrigerant heater by an inlet pipe and an outlet pipe, and which is arranged above the gas-liquid separator and which has the inlet. A heat transfer part having a second refrigerant heater communicating with the pipe and the opening / closing valve, and a liquid receiver communicating with the gas / liquid separator via the opening / closing valve and the first check valve, the gas / liquid separator, and heat dissipation. Transfer device including a ring-shaped circulation path in which the container, the second check valve, and the liquid receiver are sequentially connected. 2. The heat transfer device according to claim 1, further comprising a second refrigerant heater communicating with the outlet pipe and the on-off valve. 3. A container provided with a partition plate for partitioning an upper liquid receiving portion arranged above a refrigerant heater and a lower gas liquid separator liquid reservoir portion, the refrigerant heater and the gas liquid separator liquid reservoir portion. An inlet pipe and an outlet pipe that communicate with each other, an opening / closing valve provided in the partition plate, and a heat transfer unit that communicates with the liquid receiving unit from the inlet pipe via a second refrigerant heater and a second opening / closing valve. A heat transfer device comprising: a gas-liquid separator liquid reservoir, a radiator, and an annular circulation path sequentially connecting the liquid receiver.