JP2827809B2 - Heat transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

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

That is, the gas-liquid separator 1 is disposed above the refrigerant heater 2 and is connected to the refrigerant heater 2 by an inlet pipe 3 of the refrigerant heater 2 and an outlet pipe 4 of the refrigerant heater 2. It forms an annular path. Further, the liquid receiver 5 is disposed above the gas-liquid separator 1, connected to the gas-liquid separator 1 below by a drop pipe 7 having a first check valve 6, and furthermore, a pressure equalizing pipe having an on-off valve 8. 9 is connected to the gas-liquid separator 1 via the outlet pipe 4. Gas-liquid separator 1 and radiator 10 arranged indoors as a use side
Are connected by a gas refrigerant outgoing pipe 11, and the radiator 10 and the liquid receiver 5 are connected by a liquid refrigerant return pipe 13 having a second check valve 12. 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 that is sequentially connected to the pipe.

[0004] Reference numeral 14 denotes a temperature detector provided in the outlet pipe 4 of the refrigerant heater 2, and reference numeral 15 denotes a control device for controlling the opening / closing time of the on-off valve 8 based on the temperature detected by the temperature detector 14. Reference numeral 16 denotes a burner provided in the refrigerant heater 2, and the refrigerant is heated by the burner 16. 17 is a blower provided in the radiator 10. The first check valve 6 opens and closes by a flow generated by a pressure difference generally used in the refrigerant circuit, and opens when the receiver 5 is at a lower pressure than the gas-liquid separator 1 and closes when the receiver is at a high pressure. I do.

The operation of the above configuration will be described below. In the refrigerant heater 2, the refrigerant heated by the combustion heat of the burner 16 passes through the outlet pipe 4 in the two-phase state of gas and liquid, flows into the gas-liquid separator 1, and the liquid refrigerant heats again from the inlet pipe 3. Into the vessel 2. On the other hand, the gas-liquid separator 1
Of the two-phase refrigerant flowing into the gas refrigerant, the gas refrigerant enters the radiator 10 through the gas refrigerant outflow pipe 11, exchanges heat with the room air sent by the blower 17, radiates and condenses, and turns into supercooled liquid.

When the on-off valve 8 is closed, the supercooled liquid refrigerant condensed and liquefied by the radiator 10 is supplied to the liquid refrigerant return pipe 13.
Then, the gas refrigerant flows into the liquid receiver 5 through the second check valve 12 by condensing the gas refrigerant. At this time, since the pressure in the liquid receiver 5 is lower than the pressure in the gas-liquid separator 1, the first check valve 6 is closed. In this state, when the on-off valve 8 is opened, the liquid receiver 5 and the gas-liquid separator 1 communicate with each other by the pressure equalizing pipe 9 to be in an equal pressure state, and the liquid refrigerant in the liquid receiver 5 is subjected to the first check by gravity. The gas flows into the gas-liquid separator 1 through the valve 6.

Next, when the on-off valve 8 is closed again, the gas refrigerant in the receiver 8 is condensed, so that the pressure in the receiver 8 is lower than that of the gas-liquid separator 1 and the first check valve 6 is closed. State. Then, the liquid refrigerant condensed and supercooled by the radiator 10 is sucked into the receiver 5 by the rapid decompression in the receiver 5, and
Is repeated with the liquid refrigerant. As described above, a natural circulation cycle is performed between the gas-liquid separator 1 and the refrigerant heater 2 by the evaporated refrigerant pressure, and the supply of the liquid refrigerant from the receiver 5 to the gas-liquid separator 1 and the refrigerant heater 2 is performed by the on-off valve 8. Is an intermittent operation cycle based on the opening / closing cycle.

[0008]

In the above-mentioned conventional structure, the opening and closing operation cycle of the on-off valve 8 for carrying out heat transfer by heating the refrigerant is performed as shown in FIG. The liquid receiver drops into the gas-liquid separator 1 from the liquid receiver 5 which is full when the shut- _off time T _{OFF of the on-off} valve 8 is completed when the inside of the liquid receiver 5 which has become empty is filled with the liquid refrigerant and the decompression is completed. sum closing period of the opening time T _ON of the on-off valve 8 to T _S (T _S = T _ON
+ T _OFF ).

The closing time T _OFF is determined by the internal volume of the receiver 5 and the flow path resistance from the radiator 10 to the receiver 5, and the opening time T _ON is the internal volume of the receiver 5 and the pressure equalizing pipe 9. It is determined by the flow path resistance of the drop pipe 7 and the first check valve.

[0010] the sum of the closing period T _S is open time T _ON and the closing time T _OFF of the thus-off valve _{8 (T S = T O N} + T OFF), due to the relatively large this open time T _ON , Opening and closing cycle T
There was a situation where _S had to be set longer, and there was a restriction on increasing the heat transfer amount (heating capacity in the case of heating).

The present invention has been made to solve the above-mentioned problem, and comprises a partition plate for partitioning a container into an upper liquid receiving portion and a lower liquid reservoir portion. This partition plate has an on-off valve to eliminate the pressure equalizing pipe. The opening / closing cycle can be shortened by eliminating the dropping pipe and reducing the flow path resistance and shortening the dropping time, increasing the heat transfer capacity, increasing the liquid receiving part, gas-liquid separator part, and liquid reservoir part. It is an object of the present invention to improve reliability and reduce costs by reducing the number of parts and reducing the number of brazing points because the check valve can be constituted by one container and the check valve can be eliminated.

[0012]

In order to achieve the above object, the present invention provides a refrigerant heater, a container disposed above the refrigerant heater, and an upper liquid receiving part and a lower gas receiver in the container. A partition plate for partitioning the liquid separator into a liquid reservoir, an inlet pipe and an outlet pipe that communicate the refrigerant heater with the gas-liquid separator liquid reservoir, a heat transfer unit having an on-off valve in the partition plate, and the gas-liquid separator liquid reservoir. And a control unit that opens and closes the on-off valve.

A heat insulating material is provided above and below the partition plate, or the shape of the partition plate is made convex downward. Further, a plate having an opening is provided between a connection portion between the gas-liquid separator liquid storage portion of the outlet pipe and the communication portion, and a connection portion between the gas-liquid separator liquid storage portion of the circulation path.

[0014]

According to the present invention, the above-mentioned construction comprises a partition plate for partitioning the container into an upper liquid receiving portion and a lower gas-liquid separator liquid reservoir portion. The diameter of the on-off valve is increased so that is replaced. The downpipe becomes the shortest by attaching the on-off valve directly to the partition plate, and when the diameter of the on-off valve is increased, the flow path resistance corresponding to the pressure equalizing pipe and the flow path resistance of the dropping pipe become small, and the on-off valve At the same time as the opening, the liquid refrigerant in the liquid receiving section that has become full is dropped in a large amount into the gas-liquid separator liquid storage section in a short time.

By reducing the flow path resistance in this way, the opening time of the on-off valve is greatly reduced, the opening / closing cycle is reduced, and the number of suction / drops of the liquid receiver per unit time is increased to increase the refrigerant flow. The circulation amount can be increased, and the refrigerant heating amount is increased. Further, the on-off valve and the first check valve can be constituted by one on-off valve.

Further, by forming the partition plate in a downwardly convex shape, the time for the liquid refrigerant to fall from the liquid receiving portion is reduced. Further, as a configuration in which a heat insulating material is provided above or below the partition plate, the liquid receiving part and the gas-liquid separator liquid storing part are insulated to prevent a rise in the temperature of the liquid receiving part.

By providing a plate having an opening between the communicating portion and the connecting portion, the liquid refrigerant of the gas-liquid mixed refrigerant is stored in the lower liquid storage portion, and the gas refrigerant flows to the circulation path.

Further, the heat insulating material is formed in a downward convex shape,
By providing a check valve on the partition plate corresponding to the lowermost end of the heat insulating material, the time during which the liquid refrigerant falls from the liquid receiving portion is shortened, the open time T _{ON of the} on-off valve can be shortened, and the refrigerant circulation capacity increases. .

[0019]

FIG. 1 shows an embodiment of the present invention. 1, the same reference numerals as those in FIG. 3 denote the same members, and have the same functions. Therefore, detailed description will be omitted, and different points will be mainly described.

Reference numeral 18 denotes a container arranged above the refrigerant heater 2, and the container 18 is divided into an upper liquid receiving portion 19 and a lower gas-liquid separator liquid reservoir 20 by a partition plate 21. The refrigerant heater 2 and the gas-liquid separator liquid reservoir 20 communicate with each other through an inlet pipe 3 and an outlet pipe 4. 22 is the burner 16
The liquid heater 20 and the gas-liquid separator liquid reservoir 20 are connected to an annular pipe, and the liquid receiver 19 and the gas-liquid separator liquid reservoir 2 are connected to each other.
0 and a heat transfer section connected to the annular pipe provided with the on-off valve 23 and the annular pipe. 24 is a gas-liquid separator liquid reservoir 2
0, a radiator 10, a second check valve 12, and a liquid receiving portion 19 are sequentially connected to the pipe by an annular circulation path. The container 18 is made of a metal such as iron or aluminum, and then brazed, welded, or the like.
1, the on-off valve 23 is joined to the partition plate 21 or is formed as an integral structure. In the present embodiment, a valve seat 27 is formed integrally with the partition plate 21, and a valve body 28 slid in contact with the valve seat 27 is moved by an electromagnetic coil 29, and the on-off valve 23 is opened.
Open and close.

Reference numeral 25 denotes a combustion amount varying device for varying the combustion amount of the burner 16, and 26 denotes a control device electrically connected to the on-off valve 23, the temperature detector 14, and the combustion amount varying device 25.

In the above configuration, heating of heat transfer by refrigerant heating is performed by opening / closing operation of the on-off valve 23, combustion by the burner 16, and operation of the blower 17. Here, the flow of the refrigerant is
When the on-off valve 23 is closed, the gas refrigerant is condensed and liquefied in the radiator 10 and the supercooled liquid refrigerant flows into the liquid receiving portion 19 from the liquid refrigerant return pipe 13 through the second check valve 12, By condensing the gas refrigerant, the pressure in the liquid receiving portion 19 decreases, and the liquid refrigerant rapidly flows into the liquid receiving portion 19.

When the inside of the liquid receiving section 19 is filled with the liquid refrigerant, the flow of the liquid refrigerant stops. Therefore, when the on-off valve 23 is opened, the liquid receiving part 19 and the gas-liquid separator liquid reservoir 20 communicate with each other to be in a pressure equalized state, and the liquid refrigerant in the liquid receiving part 19 passes through the on-off valve 23 due to gravity to be gas-liquid. It flows into the separator liquid reservoir 20. At this time, the gas refrigerant in the gas-liquid separator liquid reservoir 20, which is simultaneously replaced with the liquid refrigerant in the liquid receiver 19,
And flows to the liquid receiving portion 19.

Next, when the liquid refrigerant in the liquid receiving portion 19 has completely flowed, when the on-off valve 23 is closed again, the liquid receiving portion 19 is instantaneously reduced in pressure to a low pressure, and the radiator 10 is placed in the liquid receiving portion 19. The cycle in which the condensed and supercooled liquid refrigerant is sucked and the liquid receiving portion 19 is filled with the liquid refrigerant is repeated.

Here, the pressure equalizing tube 9 in the conventional example is eliminated,
By increasing the diameter of the on-off valve 23 so that the gas refrigerant is replaced at the same time as the liquid refrigerant falls from the on-off valve 23, the length becomes the shortest.
3 is the shortest. Therefore, the flow path resistance between the gas refrigerant and the liquid refrigerant flowing through the on-off valve 23 is reduced, and the liquid refrigerant in the liquid receiving part, which becomes full at the same time as the on-off valve 23 is opened, is replaced with the gas refrigerant and the gas-liquid separator liquid is stored. It is dropped into the unit 20 in large quantities.

Therefore, the flow path resistance can be reduced, and the opening time T _{ON of the} on-off valve 23 can be greatly reduced. For this reason, the refrigerant circulation capacity increases due to an increase in the number of times the liquid refrigerant is sucked and dropped in the liquid receiving section 19, and the amount of combustion in the refrigerant heater 2 increases, and the heat transfer amount (heating capacity in the case of use for heating). Can be increased.

Further, the container 18 is partitioned into an upper liquid receiving part 19 and a lower gas-liquid separator liquid storage part 20 by a partition plate 21, and has a gas-liquid separator liquid storage part having both a gas-liquid separation function and a refrigerant liquid storage function. 20. For this reason, the liquid of the refrigerant gas-liquid separated in the upper part immediately accumulates in the liquid reservoir in the lower part, so that the gas-liquid separation performance is improved, the degree of thirst of the circulation path 24 is high, and the sensible heat ratio is large, so that the heat transfer amount is increased. In addition, since the liquid refrigerant is immediately stored in the gas-liquid separator liquid storage section 20, the operation can be performed with a small amount of the charged refrigerant.

Another embodiment of the present invention shown in FIG.
An on-off valve 23 is mounted outside the container 18, and each of the on-off valves 23 communicates with a liquid receiving part 19 and a gas-liquid separator liquid storage part 20. Also in this configuration, the same operation and effect as those of the above-described embodiment are obtained, the on-off valve 23 is easily mounted, and replacement and repair can be easily performed.

Another embodiment of the present invention shown in FIG.
The partition plate 21 has a check valve 31 that is closed by a spring 30 instead of an open / close valve, and a solenoid valve 33 that moves a pin 32 as means for forcibly opening the check valve 31. The operation is provided with a control unit 26. Then, a replacement communication pipe 34 communicating with the vicinity of the upper end of the liquid receiver 19 is provided in the liquid receiver 19 near the check valve 31. The inside of the liquid receiving portion 19 is filled with the liquid refrigerant, and the check valve 31 is operated by the operation of the solenoid valve 33.
Is opened, the liquid refrigerant in the liquid receiving section 19 flows into the gas-liquid separator liquid storing section 20 through the check valve 31 by gravity.
At this time, the gas refrigerant in the gas-liquid separator liquid reservoir 20 that simultaneously displaces the liquid refrigerant in the liquid receiver 19 flows to the liquid receiver 19 through the check valve 31. At this time, the liquid receiving part 1 near the check valve 31
9 is provided with the replacement communication pipe 34 communicating with the vicinity of the upper end,
The gas refrigerant to be replaced flows through the replacement communication pipe 34 to the upper part of the liquid receiving portion 19, and can be separated from the flow of the liquid refrigerant through the check valve 31. All run down. The check valve 31 opens when the solenoid valve 33 is opened and closed, and when closed, closes only when there is no liquid refrigerant in the liquid receiving portion 19. That is, at the time of the closing operation, if there is liquid refrigerant in the liquid receiving portion 19, the check valve 31 opens by gravity and the liquid refrigerant drops. When the liquid refrigerant in the liquid receiving portion 19 is exhausted, the valve is instantly closed by the force of the spring 30. Therefore, the liquid receiving section 19 is instantaneously decompressed to a low pressure, and the condensed and supercooled liquid refrigerant of the radiator 10 is sucked into the liquid receiving section 19 and the liquid receiving section 19 is sucked.
Is repeated with the liquid refrigerant. As described above, the liquid refrigerant in the liquid receiving portion 19 can be completely replaced in each cycle, so that the amount of the refrigerant transferred in one cycle can be maintained at the same maximum amount as the volume of the liquid receiving portion 19. By increasing the number of suctions and drops of the liquid refrigerant and maintaining the maximum capacity, the circulation capacity of the refrigerant is increased and the capacity can be increased.

The gas-liquid separator liquid reservoir 2 of the outlet pipe 4
In addition, a plate 38 having a plurality of openings 37 is provided between the communication part 35 for connecting the refrigerant heater 2 and the connection part 36 for connecting the gas-liquid separator liquid storage part 20 of the circulation path 24 to the communication part 35. The gas-liquid mixed refrigerant flowing to the liquid refrigerant is partitioned by a plate 38, the liquid refrigerant is stored in a lower liquid storage part, and the gas refrigerant is supplied from the opening 37 to the connection part 3.
6 to the circulation path 24. For this reason,
The gas-liquid separation performance is improved, the heat transfer amount is increased, and the gas-liquid separation performance can be maintained even when the liquid refrigerant in the liquid reservoir is disturbed by the drop of the refrigerant from the check valve 31 or the like.

The partition plate 21 is formed to be convex downward, and an on-off valve 31 is provided at the lowermost end of the partition plate 21 to open the on-off valve 31 to reverse the liquid refrigerant in the liquid receiving portion 19 by gravity. When flowing into the gas-liquid separator liquid reservoir 20 through the stop valve 31, the partition plate 21 forming the bottom of the liquid receiving portion 19 becomes convex downward, and a check valve is provided at the lowermost end of the partition plate 21. Since the liquid refrigerant flows along the convex shape and flows into the gas-liquid separator liquid reservoir 20 from the check valve 31, the liquid refrigerant completely flows from the liquid receiver 19 to the gas-liquid separator liquid. The time for falling into the reservoir 20 is further reduced. Therefore,
The opening time T _ON of the on-off valve 31 can be further reduced, and the number of times the liquid refrigerant is sucked and dropped in the liquid receiving section 19 increases the refrigerant circulation capacity, thereby increasing the capacity.

As shown in FIG. 4, a heat insulating material 39 made of resin such as Teflon or nylon is formed on the upper part of the partition plate 21.
Is provided, the liquid receiving part 19 and the gas-liquid separator liquid storing part 20 are insulated. When the on-off valve 31 is in the closed state, the liquid refrigerant condensed and liquefied by the radiator 10 and supercooled flows from the liquid refrigerant return pipe 13 into the liquid receiving portion 19 via the second check valve 12, and the gas refrigerant Is condensed, the liquid receiving part 19 is also cooled. At this time, since the gas-liquid separator liquid reservoir 20 is a high-temperature saturated refrigerant, heat flows from the gas-liquid separator liquid reservoir 20 to the liquid receiver 19. By insulating this with the heat insulating material 39, the temperature rise of the liquid receiving part 19 can be prevented, the time for the gas refrigerant in the liquid receiving part 19 to be condensed by the supercooled refrigerant and the pressure is reduced, and the liquid receiving part 19 is quickly reduced. The flow of the liquid refrigerant into the refrigerant is completed. Therefore, the closing time T _{OFF of the} on- _off valve 31 can be reduced,
The capacity can be further increased by increasing the number of times the liquid refrigerant is sucked and dropped in the liquid receiving section 19.

The drive input does not change, and the only input for heat transfer is the input of the on-off valve 31, so that the economic efficiency does not change. In addition, since the liquid receiving portion 19 and the gas-liquid separator liquid storing portion 20 having both the gas-liquid separating function and the liquid storing function are constituted by one container 18, the number of parts is reduced, and the number of brazing points is reduced, so that reliability is reduced. Performance, compactness and low cost. Further, since the conventional on-off valve 8 and the first check valve 6 can be constituted by one on-off valve 31, the number of parts is reduced, the number of brazing points is reduced, and the liquid receiving part 1 is reduced.
Since the seal portion 9 is one portion of the on-off valve 31, the leak is reduced by half and the reliability is improved.

[0034]

As described above, the heat transfer device of the present invention comprises a refrigerant heater, a container disposed above the refrigerant heater, and an upper liquid receiving portion and a lower gas-liquid separator liquid in the container. A partition plate that partitions into a reservoir, an inlet pipe and an outlet pipe that communicate the refrigerant heater and the gas-liquid separator liquid reservoir, a heat transfer unit having an on-off valve in the partition plate, and the gas-liquid separator liquid reservoir;
The following effects can be obtained because the radiator and the liquid receiving unit are sequentially connected to each other, and the control unit performs opening and closing of the on-off valve.

(1) Eliminating the equalizing pipe, increasing the diameter of the on-off valve so that the gas refrigerant is replaced at the same time as the liquid refrigerant drops from the on-off valve, and the dropping pipe is provided with the on-off valve directly attached to the partition plate. The flow resistance of the pressure equalizing pipe and the dropping pipe can be reduced, and the opening time of the on-off valve can be greatly shortened, thereby increasing the heat transfer capacity.

(2) The container is constituted by a partition plate for partitioning an upper liquid receiving portion and a lower gas-liquid separator liquid reservoir portion. The liquid reservoir of the gas-liquid separator, which has both the gas-liquid separation function and the liquid storage function, can be composed of one container, and the number of parts is reduced, and therefore the number of parts to be brazed is reduced, reliability is improved, and compactness and low cost are achieved. Becomes

(3) Since the on-off valve and the first check valve can be constituted by one on-off valve, the number of parts is reduced and the number of brazing points is reduced, and the sealing portion of the liquid receiving part is provided by one on-off valve. Therefore, reliability due to leakage is also improved.

(4) The drive input does not change, and the input for the heat transfer is only the input of the on-off valve, so that the economic efficiency does not change.

(5) By providing the replacement communication pipe communicating with the vicinity of the upper end of the liquid receiving section in the liquid receiving section of the check valve, the gas refrigerant to be replaced with the liquid refrigerant in the liquid receiving section is replaced in the replacement communication pipe. Therefore, all the liquid refrigerant in the liquid receiving section flows down in a shorter time, and the opening time can be greatly shortened, thereby increasing the heat transfer capacity.

(6) Since the partition plate has a check valve and the means for forcibly opening the check valve is provided, the liquid refrigerant in the liquid receiving section can be completely replaced in each cycle. The maximum amount of refrigerant conveyed in the cycle can be maintained, and the refrigerant circulation capacity can be increased and the capacity can be increased by increasing the number of suctions and drops of the liquid refrigerant and maintaining the maximum capacity.

(7) Further, the partition plate is formed in a convex shape downward, and a check valve is provided at the lowermost end of the partition plate, so that the liquid refrigerant flows along the convex shape and receives the liquid refrigerant. The time to drop from the liquid part is shorter. In addition, as a configuration in which a heat insulating material is provided on the upper or lower part of the partition plate, the liquid receiving portion and the gas-liquid separator liquid reservoir are insulated to prevent the temperature of the liquid receiving portion from rising, whereby the gas refrigerant is condensed and the pressure is reduced. As a result, the closing time T _{OFF of the} on- _off valve can be shortened, and the capacity can be further increased.

(8) Then, between the communicating part and the connecting part,
By providing a plate having an opening, the liquid refrigerant of the gas-liquid mixed refrigerant collects in the lower liquid reservoir and the gas refrigerant flows to the circulation path, so that the gas-liquid separation performance is improved and the heat transfer amount is increased,
The gas-liquid separation performance can be maintained even with fluctuations.

(9) By forming the heat insulating material in a downwardly convex shape and providing a check valve on a partition plate corresponding to the lowermost end of the heat insulating material, the time required for the liquid refrigerant to fall from the liquid receiving portion is reduced. As a result, the opening time T _{ON of the} on-off valve can be shortened, the refrigerant circulation capacity can be increased, and the capacity can be increased.

[Brief description of the drawings]

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

FIG. 2 is a system configuration diagram of a conventional heat transfer device.

FIG. 3 is a decompression characteristic diagram of a liquid receiver in a conventional heat transfer device.

FIG. 4 is a system configuration diagram of a heat transfer device according to another embodiment of the present invention.

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

[Explanation of symbols]

 2 Refrigerant heater 3 Inlet pipe 4 Outlet pipe 10 Radiator 12 Second check valve 18 Container 19 Liquid receiving part 20 Gas-liquid separator liquid storage part 21 Partition plate 22 Heat transfer part 23 Open / close valve 24 Circulation path 26 Control part 31 Reverse Stop valve 34 Displacement communication pipe

──────────────────────────────────────────────────続 き Continued on the front page (72) Norio Tao, Inventor 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-60-30991 (JP, A) JP-A-3 -156218 (JP, A) JP-A-5-288427 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24D 7/00 F04C 23/02

Claims (6)

(57) [Claims] A container having therein a refrigerant heater, a partition plate for partitioning an upper liquid receiving portion and a lower gas-liquid separator liquid reservoir portion disposed above the refrigerant heater, and the refrigerant heater; An inlet pipe and an outlet pipe communicating with the gas-liquid separator liquid reservoir, a heat transfer unit having an on-off valve in the partition plate, an annular shape in which the gas-liquid separator liquid reservoir, a radiator and the liquid receiver are sequentially connected. And a control unit for opening and closing the on-off valve. 2. A heat transfer apparatus according to claim 1, further comprising a check valve disposed on the partition plate, means for forcibly opening the check valve, and a control unit for instructing the operation of the check valve. apparatus. 3. The heat transfer device according to claim 1, wherein a replacement communication pipe communicating with the vicinity of the upper end of the liquid receiving portion is provided in the liquid receiving portion of the on-off valve. 4. The heat transfer device according to claim 1, wherein a heat insulating material is provided above or below the partition plate. 5. The heat transfer device according to claim 1, wherein the partition plate is formed to be convex downward, and an on-off valve is provided at a lowermost end of the partition plate. 6. An outlet pipe between a communicating portion with the gas-liquid separator liquid reservoir and a connecting portion of the circulation path with the gas-liquid separator liquid reservoir.
The heat transfer device according to claim 1, further comprising a plate having an opening.