JPS61265392A - Thermal pump - Google Patents

Abstract

PURPOSE:To increase the heat transport quantity by installing a driving means which connects and disconnects freely at least one among a heat absorbing part and a cooling part to an accumulator through a heat pipe, thus permitting the compulsory cooling for the accumulator. CONSTITUTION:When a heat pipe 7 is switched clockwise by the operation of a driving means 23, and the heat pipe 7 is connected to an accumulator 5 and a condenser 1 as shown by the figure, one edge of the heat pipe 7 is cooled by the cooling action on the condenser 1 side. Therefore, the heat is transmitted to the condenser 1 side through the evaporation of coolant in the accumulator 5, and cooling is performed, and the accumulator 5 is compulsorily cooled. Through the cooling, the pressure of steam in the accumulator 5 sharply lowers, and the fluid as the liquid in a fluid loop flows-in from a suction port 13, passing through a pipe 15 and a cooling side check valve 9 from a liquid container 25 on the condenser 1 side. Thus, the compulsory cooling of the accumulator 5 is permitted, and the heat transport quantity can be increased, and the thermal loss can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a thermal pump used in a heat radiation system of a space station, etc. 1 [Technical background of the invention and its problems] Heat generated by electronic equipment used in large-scale artificial sanitation facilities or the space station needs to be exhausted into space by a radiator in the space station itself. Therefore, an important technical element for heat dissipation systems such as space stations is how to efficiently transport heat from heat generating equipment to radiators.

By the way, as a heat transport method for space stations, etc.,
Liquid loops are promising because of their natural heat transport capabilities. However, in a single-phase liquid loop, as the heat transport M increases, it is necessary to increase the size of the pump, piping, etc., and it is less practical in terms of weight and the like. Therefore, a two-phase liquid loop that transports heat using latent heat due to a phase change of the working fluid is considered advantageous. In other words, since the two-phase liquid loop utilizes latent heat, the circulation of the working fluid is reduced, and therefore piping, pumps,
This method has the advantage of being compact and easy to manage, such as circulating driving force, and is a highly practical method. In this two-phase liquid loop, the circulating fluid is sent in a liquid phase to a heat generating part such as an electronic device, where it absorbs heat and changes into a vapor phase. This vapor phase is sent to the heat radiating section, where it radiates heat and returns to the liquid phase. In order to circulate a fluid close to a two-phase equilibrium state, the biggest technical challenge in a two-phase liquid loop lies in the pump that provides the driving force for liquid circulation. Conventional mechanical pumps have problems with cavitation of the working fluid, lubrication of the motor, and reliability. Capillary pumps, thermal pumps, etc. are seen as promising alternatives to these mechanical pumps, and their development is becoming more active. There is.

As a conventional heat dissipation system using a thermal pump, there is one shown in FIG. 4, for example.

That is, this system uses the condenser 10 as a heat dissipation section.
1. Evaporator 103 as a heat absorption section. It is composed of two accumulators 105A, 105B, a heat radiation side check valve 107, a heat absorption side check valve 109, etc.

The accumulators 105A and 105B are provided with auxiliary heaters 111A and 111B, respectively, and are configured to alternately repeat 0N10FF at a constant cycle.

Therefore, the vapor evaporated by absorbing heat from the electronic equipment or the like in the evaporator 103 as a heat absorbing section is transported along the diameter of the pipe to the condenser 101 as a heat radiating section, where it releases heat and is condensed. The condensed liquid passes through the heat radiation side check valve 107 and passes through the accumulator on the side not heated by the auxiliary heater.
For example, it flows into the accumulator 105A. The liquid in the other accumulator 105B is transferred to the auxiliary heater 11
1B, the vapor pressure increases, and as a result, a driving force for liquid circulation from the accumulator 105B to the evaporator 103 is generated, and the liquid passes through the endothermic side check valve 109 and is refluxed.

Therefore, by alternately heating the accumulators 105A, 105B by the auxiliary heaters 111A, 111B, liquid reflux from the accumulators 105A, 105B is alternately performed, and steady heat transport is performed.

By the way, in a heat dissipation system using such a thermal pump, the accumulator 105A on the side that is not heated,
Since 105B naturally radiates heat, there is a limit to the increase in heat transport amount.

In addition, after heating with the auxiliary heaters 111A and 111B, heat is radiated to the outside in the heat radiation process, so the auxiliary heaters 111A and 1
The loss of thermal energy provided by 11B is extremely large.

Furthermore, in order to control the accumulators 105A and 105B according to the amount of heat absorbed by the evaporator 103,
The amount of heating by the auxiliary heaters 111A and 111B or the amount of heat radiated during the heat radiation process must be controlled, which complicates the structure.

[Purpose of the invention]

This invention was devised in view of these conventional problems, and enables forced heat dissipation of the accumulator to increase the amount of heat transport, reduce heat loss, and furthermore, The purpose of the present invention is to provide a thermal pump that can control an accumulator according to the amount of heat absorbed by a heat absorption part without requiring a control device.

[Summary of the invention]

In order to achieve the above object, the present invention provides a fluid loop in which a fluid circulates between a heat radiating part and a heat absorbing part, in which a fluid loop is provided in the middle of a pipe line from the heat radiating part to the heat absorbing part, and the fluid flows from the heat absorbing part to the heat radiating part. It is equipped with a plurality of check valves in the flow direction that prevents the flow of water, and an accumulator that is communicated with the pipe between these check valves and sucks the fluid in the pipe. In a thermal pump that sucks fluid, a heat pipe that can freely connect and disconnect between at least one of the heat absorption section and the heat radiation section and the accumulator, and a drive means that connects and disconnects the heat pipe. The configuration includes the following.

〔Effect of the invention〕

According to the configuration of the present invention, at least one of the heat radiating part side and the heat absorbing part side and the accumulator are brought into contact with and separated from each other by the heat pipe, so that the heat radiating action of the heat radiating part is suppressed during the heat radiating process of the accumulator. This makes it possible to create a configuration in which heat is forcibly dissipated. Therefore, the amount of heat transport can be increased by increasing the flow rate. Further, it is possible to perform heating using the heat absorbed by the heat absorbing portion during the heating process of the accumulator. Therefore, it is possible to reduce heat loss without requiring heating using a heater or the like. Furthermore, a configuration is possible in which the accumulator is heated according to the amount of heat absorbed in the heat absorbing section, and control according to the amount of heat absorbed is possible without the need for a special control device.

(Embodiment of the Invention) An embodiment of the invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows a schematic configuration diagram of a heat dissipation system, which is configured as a fluid loop in which fluid circulates,
A condenser 1 as a heat radiator that radiates heat to outer space, and an evaporator 3 as a heat absorber that absorbs heat from electronic equipment and evaporates liquid-phase circulating fluid. Accumulator5. heat pipe 7
, a heat radiation side check valve 9, a heat absorption side check valve 11, etc.

The inlet port 13 of the accumulator 5 is connected to a heat radiation side check valve 9.
, are connected to the condenser 1 via a conduit 15, and the discharge port 17 is connected to the evaporator 3 via an endothermic side check valve 11 and a conduit 19. Therefore, in the fluid loop that circulates between the condenser 1 and the evaporator 3, there are a plurality of flow directions that block the flow of the circulating fluid from the evaporator 3 to the condenser 1 in the middle of the pipe line from the condenser 1 to the evaporator 3. The accumulator 5 is configured to be provided with check valves 9 and 11, and the accumulator 5 is connected to a pipe line between these check valves 9 and 11. Further, the evaporator 3 and the condenser 1 are connected via a pipe line 21.

The heat pipe 7 has a refrigerant such as water, alcohol, or Freon sealed inside, and absorbs heat from one end through evaporation and condensation of the refrigerant, and transports the absorbed heat to the other end to radiate the heat. It is something.

The heat pipe 7 is formed in a single-shape, and a motor, an electromagnetic drive device, etc. as a drive means 23 is provided at the center of the bend, and the connection to the accumulator 5 is condensed by the operation of the drive means 23. It is configured to be switchable between the evaporator 1 side and the evaporator 3 side. That is, the driving means 2
When the heat pipe 7 is switched clockwise in FIG. 1 by the operation of step 3, the heat pipe is connected to the accumulator 5 and the condenser 1, and when it is switched counterclockwise in the same figure, the heat pipe is connected to the accumulator 5. and the evaporator 3. In addition, the code|symbol 25 is the pipe line 15
This is a reservoir container for circulating fluid installed in the middle of the pipe.

Next, the operation of the above embodiment will be described.

When the heat pipe 7 is switched clockwise by the operation of the driving means 23 and the heat pipe 7 is connected to the accumulator 5 and the condenser 1 as shown in FIG. 2, one end of the heat pipe 7 is placed on the condenser 1 side. It is cooled by the heat dissipation effect. Therefore, the heat of the accumulator 5 is transmitted to the condenser side through evaporation of the refrigerant in the heat pipe 7 and is radiated, and the heat of the accumulator 5 is forcibly radiated. Due to this heat radiation, the steam pressure in the accumulator 5 rapidly decreases, and the liquid in the fluid loop passes from the liquid flow container 25 on the condenser 1 side through the pipe line 15, the heat radiation side check valve 9, and from the suction port 13 into the accumulator 5. Fluid as a phase enters.

Next, the heat pipe 7 is switched counterclockwise by the operation of the driving means 23, and as shown in FIG.
When the heat pipe 7 is connected to the accumulator 5 and the evaporator 3, the heat of the electronic device or the like which the evaporator 3 absorbs heats the other end of the heat pipe 7. This heat is transmitted to the accumulator 5 side, contrary to the above, and the accumulator 5 is heated by heat radiation.

Due to this heating, the fluid in the accumulator 5 evaporates, the vapor pressure rises, and the liquid phase fluid in the accumulator 5 flows out from the outlet 17 and returns to the evaporator 3 through the endothermic side check valve 11 and the pipe 19. be done.

Then, when the heat pipe 7 is switched clockwise by the operation of the driving means 23 and the accumulator 5 and condenser 1 are connected again, the heat of the accumulator 5 is transmitted to the condenser 1 side via the heat pipe 7, and the accumulator 5 temperature decreases, the fluid in the accumulator 5 condenses, and the circulating fluid is reintroduced from the liquid storage container 25 on the condenser 1 side.

Therefore, the heat pipe 7 is driven by the actuation of the driving means 23.
By alternately switching between the condenser 1 side as a heat radiating part and the evaporator 3 side as a heat absorbing part at a constant cycle, heating and cooling of the accumulator 5 are alternately repeated and liquid reflux is performed.

The circulating fluid as a liquid phase that is returned to the evaporator 3 absorbs heat from the electronic equipment and evaporates, passes through the pipe line 21, reaches the condenser 1, and is heat-radiated and condensed in the condenser 1, so that the liquid phase returns to the evaporator 3. becomes. The circulating fluid that has become a liquid phase flows into the liquid storage container 25 .

As described above, in the heat dissipation process of the accumulator 5, forced heat dissipation can be performed using the condenser 1, and the circulation flow rate of the fluid loop can be increased with a simple structure, and the amount of heat transport can be significantly increased.

In the heating process of the accumulator 5, the evaporator 3 can be heated by using the heat of electronic equipment etc. that absorbs heat, so there is no need to provide thermal energy with a heater etc., and even if the heat radiation process performs external heat radiation, heat loss is reduced. can be significantly reduced.

Furthermore, the heating of the accumulator 5 has a correlation with the amount of heat generated by the electronic equipment, etc., and the accumulator 5 can be controlled according to the heat generated by the electronic equipment, etc., without the need for a control device.

Note that the present invention is not limited to the above embodiment. For example, by providing two sets of accumulators and heat pipes and repeating heating and cooling alternately at regular intervals between the two accumulators, it is also possible to have a configuration in which steady heat transport is performed.

In addition, the heat pipe 7 is connected to the accumulator 5 and the evaporator 3.
It is also possible to connect and separate only between the accumulator 5 and the condenser 1 side, or only between the accumulator 5 and the condenser 1 side. In the latter case, it goes without saying that a heater or the like for heating the accumulator 5 is provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a heat dissipation system to which a thermal pump according to an embodiment of the present invention is applied, FIGS. 2 and 3 are explanatory diagrams of the operation of the heat dissipation system shown in FIG. 1, and FIG. 4 is a conventional example. , is a schematic configuration diagram of a thermal pump system. Explanation of symbols representing main parts of the drawings 1... Heat radiation part (condenser) 3... Heat absorption part (evaporator) 5... Accumulator 7... Heat pipe 9... Heat radiation side check valve ( Check valve) 11... Endothermic side check valve (check valve) 23... Driving means Fig. 4 1... Yiyan Liao (Keng Buddha Fen) 3... Mouth-heating sugar 3.
Exempt i) 5...Complete'' P knee 4 -57...'-+Ft
: (P9°° heat exposure 18 emotion L4 + awakening party) 11...Yu Xian, side stop, Huan Dan Young) 23... station + attack 1 Figure 3

Claims (1)

[Claims] a plurality of check valves in the flow direction, which are provided in the middle of a pipe line from the heat radiating part to the heat absorbing part of a fluid loop in which fluid circulates between the heat radiating part and the heat absorbing part, and prevent the fluid from flowing from the heat absorbing part to the heat radiating part;
The thermal pump includes an accumulator that is communicated with the pipeline between these check valves and sucks the fluid in the pipeline, and the thermal pump sucks the fluid by heating and radiating heat from the accumulator. A thermal pump comprising: a heat pipe that can freely connect and separate between at least one of the heat pipe and the heat dissipating section and the accumulator; and a drive means that causes the heat pipe to connect and separate.