JPS6226491A - Heat transfer device - Google Patents

Abstract

PURPOSE:To reduce the heating amount in an accumulator as well as the power of a pump by reheating circulating liquid from a radiator to the accumulator with steam stream from a heat receiving section. CONSTITUTION:High-temperature vapor 3B, generated in the heat receiving section 1, flows to the radiator 2 through a pipeline 4A and a flow path 23 in a heat exchanger 21, and is condensed by cooling. Liquid 3A, whose temperature is lowered, passes through the pipeline 4B and the flow path 22 in the heat exchanger 21 while the temperature thereof is raised by heat received from the high-temperature vapor 3B in the flow path 23, thereafter, flows into the accumulator 7 through the pipeline 8D. Next, the accumulator 7 is heated when a thermoelectric element 13 is switched over and the liquid, whose temperature has been raised is changed into vapor. As a result, the internal pressure becomes higher than the pressure in the heat receiving section1 nd liquid in the accumulator 7 is discharged into the heat receiving section 1. Accordingly, the circulation of the liquid may be generated even in case the amount of input electric power of the thermoelectric element 13 is small.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat transfer device used for cooling electronic equipment, etc.

[Conventional technology]

Conventional heat transfer devices generally enclose a heat transport medium in a pipe and utilize the phase change of this heat transport medium between liquid and vapor, which transports the heat absorbed in the heat receiving part to the heat radiating part. I try to let it out.

FIG. 3 is a configuration diagram showing a conventional heat transfer device.

In the figure, 1 is a heat receiving part, 2 is a heat radiating part, and 3 is a condensable working fluid such as Teflon or methyl alcohol fZ as a heat transport medium. An appropriate amount of the working fluid 3 is sealed in a loop-shaped conduit 4 which has the heat receiving section 1 and the heat radiating section 2 interposed therebetween. Reference numeral 5 denotes a blower fan provided in the heat radiating section 2 to efficiently radiate heat. 6.7 is a plurality of accumulators installed in the pipe line 4 connecting the upstream side of the heat receiving section 1 and the downstream side of the heat dissipating section 2;
and a second accumulator, two of which are piped in parallel. That is, 4A is a pipe connecting the downstream side of the heat receiving part 1 and the upstream side of the heat radiating part 2. 4B and 4C are the pipes connecting the upstream side of the heat receiving part 1 and the downstream side of the heat radiating part 2. The q path 4C on the part 1 side is branched into a pipe 8A and a U path 8B that communicate and connect the first and second accumulators 6.7 and the heat receiving part 1, and the pipe 4B on the heat radiating part 2 side is It is branched into a conduit 8C and a conduit 8D that communicate and connect the first and second accumulators 6.7 and the heat radiation section 2. Reference numerals 9 to 12 indicate on-off valves as opening/closing means for selectively opening and closing the respective branched pipes 8A to 8D, and each of the on-off valves 9 and 10 is connected to each of the pipes 8A and 8B.
first and second on-off valves as on-off means installed in the
Each of the on-off valves 11 and 12 is a third and fourth on-off valve as an on-off means provided in each of the conduits 8C and 8D.

Each of the on-off valves 9 to 12 constitutes a control means for controlling the operation of each accumulator 6.7, so that their opening and closing operations are interlocked with each other as follows. In other words, a first state in which the on-off valves 9 and 12 are both open and both on-off valves 10 and 11 are closed, and a first state in which the on-off valves 9 and 12 are both closed and each on-off valve 10 and 11 are interlocked so that the second state in which both are open is alternately repeated at appropriate time intervals. Reference numeral 13 denotes a thermoelectric element that utilizes the Beltier effect as a heating and cooling means for heating and cooling each accumulator 6.7. This thermoelectric element 13 is interposed between each accumulator 6. Accumulator 6
The other surface 15 is provided so as to be in contact with the accumulator 7. This heating element 13 can heat the both surfaces 14 by switching between positive and negative currents.
．． In step 15, exothermic and endothermic events can be performed alternately.

Here, the switching between positive and negative means that when each of the on-off valves 9 to 12 is in the first state, the surface 14 of the thermoelectric element 13 is in a heating state, and the surface 15 is in a heating state.
is in the endothermic state and in the second state, the thermoelectric element 13
In the heat transfer device configured in this way, in which the surface 14 is interlocked so that the surface 14 is in the heat absorption state and the surface 15 is in the heat generation state, when the first state is set, the heat generated in the heat receiving part 1 is The steam 3B flows through the pipe line 4 to the heat radiation section 2, where it is cooled and condensed. The condensed liquid 3A passes through the on-off valve 12 via the pipe line 4B and the pipe line 8D, and flows into the accumulator 7, whereby the heat absorbed by the heat receiving part l is transferred to the heat dissipating part 2.
transported to. During this time, since the on-off valve 10 is closed, steam does not directly flow from the heat receiving section 1 to the seventh accumulator 7 through the pipe line 8B. Further, the on-off valve 9 is open, and the on-off valve 11 is closed. At this time, a voltage is applied to the thermoelectric element 13 to heat the accumulator 6 and cool the accumulator 7, and since the internal pressure of the accumulator 6 becomes higher than the internal pressure of the accumulator 7, A driving force is generated that causes the liquid to flow in the direction toward the accumulator 7. As a result, the liquid in the accumulator 6 is
A, the on-off valve 9, and the conduit 4C are returned to the heat receiving section 1. In other words, the working fluid 3 is supplied to the heat receiving part l.

On the other hand, after a certain period has passed, each accumulator 6.
When the on-off valves 9 to 12 and the thermoelectric element 13 are switched by detecting the liquid level in the thermoelectric element 7, the thermoelectric element 1
3, the surface 14 is in an endothermic state and the surface 15 is in an exothermic state, and each on-off valve 9.12 is both closed, and each on-off valve 10.1
1 is switched to the second state where both are open, the vapor 3B evaporated in the heat receiving part 1 is liquefied in the heat radiating part 2, and then flows into the accumulator 6, and the liquid is refluxed from the accumulator 7 to the heat receiving part 1. Heat transport is performed in exactly the same manner as in the first state, only with a difference. Furthermore, by switching the opening/closing of each opening/closing 9F9 to 12 and switching the current of the active element 13, each Achiemulator 6.7 is switched at the point when the working fluid 3 is flowing back into the heat receiving part 1, and the The produced fluid 3 can be returned to the heat receiving section 1.

[While the invention is trying to solve the problem]

Since the conventional heat transfer device as described above is constructed as described above, in order to increase the pressure inside each accumulator 6.7 by the )'JD heat of the heat element 13, each accumulator 6.7 It is necessary to evaporate the liquid inside, but the liquid 3A that is cooled and condensed in the heat dissipation section 2 and flows back to each accumulator 6.7 through the pipe 4B is supercooled in the heat dissipation section 2 to a condensation temperature of 1 or less. It enters at a temperature significantly lower than the temperature at which it evaporates in each accumulator 6.7. Therefore,
As the amount of heating by the thermoelectric element 13, in addition to the latent heat of vaporization that changes the liquid to vapor, an amount of sensible heat is required to raise the temperature of the liquid to the evaporation temperature. Therefore, the pump power necessary to circulate the working liquid 3 is required. There were four points: that is, a large amount of input power to the thermoelectric element 13 was required.

This invention was made to solve this problem, and by reheating the reflux liquid from the heat radiating part to the accumulator with the steam flow from the heat receiving part, the amount of heating 1 to the accumulator can be reduced. Another object of the present invention is to obtain a heat transfer device 11 that can reduce pump power.

[Means for solving problems]

The heat transfer device according to the present invention is provided with a heat transfer device for performing heat exchange between the reflux liquid from the heat radiating part to the accumulator and the liquid flow from the accumulator to the heat receiving part, in the middle of the pipe between the heat radiating part and the accumulator. A heat exchanger is installed.

Further, in the heat transfer device according to another aspect of the present invention, a return body from the heat radiating part to the accumulator and a steam flow from the heat receiving part to the heat radiating part are provided midway between the heat radiating part and the accumulator. It is recommended that a heat exchanger be installed to perform heat exchange between the two.

[Effect]

In the heat transfer VC device of the present invention, the heat exchanger interposed in the middle of the pipe between the heat radiating part and the accumulator increases the temperature of the reflux liquid from the heat radiating part to the accumulator, and as a result, the temperature of the reflux liquid from the heat radiating part to the accumulator increases. This is to reduce the heating t caused by the thermoelectric element.

〔Example〕

FIG. 1 is a block diagram showing a heat transfer device which is a concrete example of the present invention, and the same parts as in FIG. 3 are indicated by the same reference numerals, and detailed explanation thereof will be omitted.

In the figure, 21 is a heat exchanger, and this heat exchanger 21
Inside, the flow path 22 on the -blade side is interposed in the pipe i%4B between the heat radiating part 2 and each accumulator 6.7, and the flow path 23 on the other side is interposed in the pipe between each accumulator 6.7 and the heat receiving part 1. Road 4C
is interposed in.

Next, the operation of the heat transfer device shown in FIG. 1 will be explained. The switching of opening and closing of each of the on-off valves 9 to 12 and the switching of the current of the thermoelectric element 13 are the same as in the conventional device described above, so a description thereof will be omitted.

In FIG. 1, each on-off valve 9.12 is both open and each on-off valve 10 is open.
．． 11 indicates the first state in which both are closed. The high temperature steam 3B generated in the heat receiving part 1 passes through the pipe 4A and passes through the flow path 23 in the heat exchanger 21, and then flows to the heat radiating part 2,
It is cooled and condensed.

The cooled low-temperature liquid 3A passes through the pipe 4B, passes through the flow path 22 in the heat exchanger 21, receives heat from the high-temperature liquid 3A in the flow path 23, and increases its temperature. It flows into the accumulator 7 via the conduit 8D and the on-off valve 12. On the other hand, the high temperature liquid from the accumulator 6 is transferred to the on-off valve 9. After passing through the pipe 8A and the flow path 23 in the heat exchanger 21 to heat the liquid in the flow path 23, it flows into the heat receiving part l through the pipe @4C.

Next, when the on-off valves 9 to 12 and the thermoelectric element 13 are switched, the accumulator 7 will be heated by the thermoelectric element 13, but since the liquid in the accumulator 7 is at a high temperature. , evaporation occurs with only the 7IO heat that is the latent heat of evaporation that converts the liquid into vapor, and as a result, the internal pressure of the accumulator 7 becomes higher than the pressure in the heat receiving part 1, and the liquid in the accumulator 7 is discharged to the heat receiving part 1. That will happen.

Therefore, even a small amount of power input to the thermal 111 element 13 will cause liquid circulation.

In the above embodiment, the heat exchanger 21 is interposed between the pipe line 4B and the pipe line 4C in nine cases. A vessel 21 may be provided, in which case heat exchange is performed between the reflux liquid flowing into the accumulator 6 and the liquid flowing out from the accumulator 7.

FIG. 2 is a configuration diagram showing a heat transfer device which is another embodiment of the present invention, in which the same parts as in FIG. 3 are indicated using the same reference numerals, and detailed explanation thereof will be omitted. In the figure, 21 is a heat exchanger, and within this heat exchanger 21, the flow passages 22 are connected to the heat radiation part 2 and each accumulator 6.
．． The channel 23 on the other side is interposed in the pipe line 4B between the heat receiving section 1 and the heat dissipating section 2.

Next, the operation of the T heat transfer device shown in FIG. 2 will be explained. The switching of opening and closing of each of the on-off valves 9 to 12 and the switching of 1 d of the eager element 13 are the same as in the above-mentioned conventional device, so a description thereof will be omitted.

FIG. 2 shows a first state in which the on-off valves 9 and 12 are both open and the v'A closing valves 10 and 11 are both closed. The high temperature steam 3B generated in the heat receiving part 1 passes through the above-mentioned approximately 4A and the flow path 23 of the heat exchanger 21, and then flows to the heat radiating part 2, where it is cooled and condensed.

The cooled low-temperature liquid 3A passes through the pipe line 4B, passes through the flow path 22 in the heat exchanger 21, receives heat from the high-temperature steam 3Bb in the flow path 23, and increases its temperature. Conduit 8
D, passes through the on-off valve 12 and flows into the accumulator 7.

Next, each on-off valve 9-12 and heat! When the element 13 is switched, the accumulator 7 is heated more than the thermoelectric element 13 (but since the liquid in the accumulator 7 is at a high temperature, only the latent heat of vaporization that converts the liquid into vapor is heated). Evaporation occurs due to heating, and as a result, the internal pressure of the accumulator 7 becomes lower than the pressure in the heat receiving section 1, and the liquid in the accumulator 7 is discharged to the heat receiving section 1.

Therefore, even if the amount of input power to the four thermal elements 13 is small, circulation of the liquid will occur.

〔Effect of the invention〕

As explained above, the present invention provides a heat transfer device including:
A heat exchanger is configured to perform heat exchange between the low temperature reflux liquid flowing from the heat radiating section to one accumulator and the high temperature liquid flow discharged from the other accumulator to the heat receiving section, or, The heat exchanger is configured to exchange heat between the low-temperature reflux liquid from the heat radiating section to the accumulator and the high-temperature vapor flow from the heat receiving section to the heat radiating section, so that the liquid flowing into the accumulator is at a high temperature. You can get into it,
Therefore, the amount of heating to the accumulator is small, and
As a result, excellent effects such as being able to reduce the pump power required to circulate the liquid can be achieved.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a heat transfer device which is an embodiment of the present invention, Fig. 2 is a block diagram showing a heat transfer device which is another embodiment of the present invention, and Fig. 3 is a block diagram showing a heat transfer device which is an embodiment of the present invention. It is a T configuration diagram showing a heat transfer device. In the figure, 1... heat receiving part, 2... heat radiating part, 3...
・Working fluid, 3A...Liquid, 3B...Steam, 4.4
A, 4B...Pipeline, 5...Blower fan, 6,7...
・Accumulator, 8, 8A, 8B, 80.8D...
Pipe line, 9-12... Opening/closing valve, 13... Thermoelectric element, 2
1... Heat exchanger, 22. 23... Flow path. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (2)

[Claims] (1) A loop-shaped pipe line is provided with a heat receiving part and a heat radiating part interposed therebetween, a condensable working fluid as a heat transport medium is sealed in the pipe line, and the heat radiating part is placed on the upstream side of the heat receiving part. A plurality of accumulators are installed in parallel in the downstream pipe line,
A heating and cooling means for heating and cooling the accumulator is provided, and the operation of causing the working fluid condensed in the heat radiation section to flow into the accumulator and the operation of causing the fluid in the accumulator to flow back to the heat receiving section are performed for at least one accumulator. In a heat transfer device provided with a control means for causing the other accumulators to perform the same operations alternately in the reverse order of the aforementioned operations, the heat transfer device is provided with a control means that causes the other accumulators to perform the same operations alternately in the reverse order of the operations, wherein the heat is condensed in the condensing section and then flows into the one accumulator. A heat transfer device comprising a heat exchanger that performs heat exchange between the working liquid and the working liquid discharged from the other accumulator to the heat receiving section. (2) A loop-shaped pipe line with a heat receiving part and a heat radiating part interposed therebetween, a condensable working fluid as a heat transport medium is sealed in the pipe line, and the heat radiating part is placed on the upstream side of the heat receiving part. A plurality of accumulators are installed in parallel in the downstream pipe line,
A heating and cooling means for heating and cooling the accumulator is provided, and the operation of causing the working fluid condensed in the heat radiation section to flow into the accumulator and the operation of causing the fluid in the accumulator to flow back to the heat receiving section are performed for at least one accumulator. In a heat transfer device, the working liquid flows into the accumulator after being condensed in a condensing section. and a heat exchanger for performing heat exchange between the heat receiving section and the vapor of the working liquid extending from the heat receiving section to the heat radiating section.