JPS6038589A - Heat transfer device - Google Patents

Abstract

PURPOSE:To improve the heat transfer efficiency making the pulsation of the heat transferring small by a method wherein the heat transfer device is composed so as the working fluid refluxes to the heat receiving part alternately from two accumulators. CONSTITUTION:Lower part spaces of two accumulators 21, 22 are interconnected to the entrance part of a heat receiving part 1 through the intermediary of each conduit pipe 23, 24. Upper part spaces of two accumulators 21, 22 are also interconnected to the exit part of the heat receiving part 1 through the intermedary of each conduit pipe 29, 30. Furthermore, one upper space of the accumulator 21 is interconnected to the circuration entrance of the heat releasing part 2 through the intermediary of a conduit pipe 32 and the other upper space of the accumulator 22 is interconnected to the circulation exit of the heat releasing part 2 through the intermediary of conduit pipe 32. The heat transfer is carried out continuously from the heat receiving part to the heat releasing part by making the transfer of fluid between the first accumulator 21 and the second accumulator 22 by the shift of the first and second ON-OFF valves and the pulsation of the heat transfer is made small and the heat transfer efficiency can be improved.

Description

[Detailed Description of the Invention] <Technical Field of the Invention> The present invention utilizes a heat transfer device, particularly a phase change between a working fluid sealed in a pipe and a vapor, to absorb heat absorbed in a heat receiving section. The present invention relates to a heat transfer device that transports heat to a heat radiating section and radiates it.

<Prior Art> FIG. 1 is a system diagram showing an outline of the configuration of a conventional heat transfer device for this food. In the figure, 1 is a heat receiving part arranged relatively above the device, 2 is a heat radiating part below this heat receiving part 1 and arranged at the bottom of the device, and 3 is an accumulator provided above the heat receiving part 1. (Liquid accumulator), 4 is a liquid receiver provided between the accumulator 3 and the heat receiving part 1, 5 is a liquid receiver 4
A communication pipe 6 is provided in the middle of the communication pipe 5 to communicate with the accumulator 3 to balance the internal pressure. The valve seat 8 has a float 7 and a valve seat 8 connected to the communication pipe 5. 9 is a check valve arranged so that the liquid flows only from the accumulator 3 toward the liquid receiver 4; 10 is a siphon installed in the liquid receiver 4; The liquid is drained outside the container.

11 is a liquid pipe connecting the liquid receiver 4 and the lower part of the heat receiving part 1;
2 is a steam pipe connecting the upper part of the liquid receiver 4 and the upper part of the heat receiving part 1, 13A is a pipe line connecting the upper part of the liquid receiver 4 and one end of the heat radiating part 2, and 13B is the other part of the heat radiating part 2. and accumulator 3
13C is a pipe that connects the bottom of the accumulator 3 and the check valve 9, and 13D is a pipe that connects the check valve 9 and the upper part of the liquid receiver 4. Each of the pipes 13A to 13D forms a loop (closed pipe), and in the pipe including the accumulator 3 there is a pipe as a heat transport medium,
An appropriate amount of working fluid 14, which is a condensable liquid such as methyl alcohol, is sealed, and at the time of starting, the pipes other than the upper part of the accumulator 3 are filled with the liquid working fluid 14. Hereinafter, the liquid working fluid 14 will be referred to as a liquid 14A, whereas the gaseous working fluid 14 will be referred to as a vapor 14B. 15 is a blower fan.

The operation of the conventional device configured as described above is as follows.

First, when heat is supplied to the heat receiving section 1, the liquid 14A in the heat receiving section 1 is heated to high pressure steam 1 corresponding to the given temperature.
411 occurs and there is a pressure difference between heat receiving part 1 and accumulator 3? occurs, and the pressure in the heat receiving part 1 is higher than that in the pipe line 13.
The liquid 14A in the A1 heat dissipation section 2 and the pipe line 13B flows into the accumulator 3, gradually increasing the pressure in the accumulator 3.

Next, the steam 14B generated in the heat receiving section 1 is transferred to the steam pipe 12.
through the liquid receiver 4, and from the liquid receiver 4 to the pipe 13A'i
The temperature of the heat-receiving part 1 and the pipes are regulated by the temperature of the heat-receiving part and the temperature of the heat-radiating part. Road 13A
The pressure of the steam 14B in the heat radiating section 2 is a saturated vapor pressure that is approximately halfway between the temperature of the heat receiving section and the temperature of the heat radiating section. Therefore, while the liquid 14A is evaporating in the heat receiving section 1, , the pressure of the accumulator 3 is also maintained at approximately this pressure.

In this state, the steam 14B generated in the heat receiving part 1 reaches the heat radiating part 2 and is liquefied again, so that the heat in the heat receiving part 1 is transferred to the heat radiating part 21C.

In this case, since the liquid receiver 4 is located above the heat receiving part 1 and is connected to the liquid pipe 11 and the steam pipe 12, the liquid flows from the liquid receiver 4 to the heat receiving part 1 via the liquid pipe 11. The vapor 14B receives heat and evaporates in the heat receiving part 1, returns to the liquid receiver 4 through the steam pipe 12, and flows from the liquid receiver 4 to the heat radiating part 2 via the pipe 13A. Become.

Therefore, as long as there is liquid 14A in the liquid receiver 4, the heat receiving part 1 is filled with the liquid 14A, and as heat is transferred from the heat receiving part 1 to the heat radiating part 2, the liquid level in the liquid receiver 4 will start to decline. In this case, while the liquid level in the liquid receiver 4 is higher than the valve seat 8 of the on-off valve 6, the float 7 is pressed against the valve seat 8 due to the buoyant force of the liquid 14A, opening and closing the valve. Valve 6 will be closed. As a result, all the steam 14B in the liquid receiver 4 flows to the heat radiating section 2, and heat transport is performed.

When the liquid in the liquid receiver 4 is consumed as a result of heat transport and the liquid level gradually falls below the position of the valve seat 8, the float T
The liquid level also decreases as the liquid level decreases, separating from the valve seat 8, and the on-off valve 5 becomes open. Therefore, the steam 14B in the liquid receiver 4
flows into the accumulator 3, and the vapor phases of the liquid receiver 4 and the accumulator 3 are equalized in pressure. In this case, since the accumulator 3 is placed above the liquid receiver 4,
Due to the action of gravity, liquid i4A flows back from the accumulator 3 to the liquid receiver 4 through the reverse valve 9, but due to the action of the siphon 100 provided in the liquid receiver 4, The liquid level does not rise, thus allowing a certain amount of liquid 14A to flow in. While the liquid 14A is flowing from the accumulator 3 to the liquid receiver 4, the heat from the liquid receiver 4 flows into the accumulator 3 due to the steam flow through the communication pipe 5, and the pressure in the accumulator 3 increases somewhat. However, by using the siphon 10, it becomes possible to allow a large amount of liquid to flow in at once, so the time that the on-off valve 6 is closed can be extended.
Not only can the influence of the increase in pressure that occurs during the time when the on-off valve 6 is open be reduced, but also the frequency of opening and closing of the on-off valve 6 is reduced, which increases the durability of the on-off valve 6. .

A predetermined amount of liquid 14A flows into the liquid receiver 4, and the siphon 1
When the liquid 14A is discharged from 0, the liquid level rises again, the on-off valve 6 closes, the initial state is returned, and heat is transferred from the heat receiving part 1 to the heat radiating part 2.

By repeating the above operations, heat is transported from the heat receiving section 1 to the heat radiating section 2.

Since the conventional heat transfer device is configured as described above,
When the on-off valve 6 is in the open state, the steam 14B in the liquid receiver 4 flows into the accumulator 3 through the communication pipe 5, and as a result, the steam flow to the heat radiation section 2 is reduced. That is,
While the on-off valve 6 is open, the amount of heat transported from the heat receiving section 1 to the heat radiating section 2 decreases or stops, resulting in a drawback that temporal pulsations occur in the heat transport.

Furthermore, since most of the steam generated in the heat receiving section 1 flows through the communication pipe 5, there is a large pressure loss in the communication pipe 5, and there is also a drawback that it is difficult to equalize the pressures of the liquid receiver 4 and the accumulator 3.

<Summary of the Invention> In view of the above-mentioned conventional circumstances, the present invention aims to provide a highly reliable heat transport device that eliminates heat transport pulsations by using two accumulators. The purpose is

That is, the present invention provides a heat transfer device that transports heat from a heat receiving section to a heat radiating section by circulating a condensable working fluid as a heat transporting medium sealed inside a pipe. An accumulator is provided, and the lower space of each of the two accumulators and the inlet of the heat receiving section are connected to each other.
The upper space of each of the two accumulators and the outlet of the heat receiving section are communicated via the respective pipes, and the upper space of one accumulator is communicated with the one-side circulation port of the heat radiating section, and the upper space of the other accumulator is communicated with the heat radiating section. The flow port on the other side is communicated with the other side through the respective pipes, while the working fluid condensed in the heat radiating part flows into one accumulator, and the fluid in the other accumulator flows back to the heat receiving part. This heat transfer device is provided with means for alternately performing heat transfer for each accumulator.

<Embodiments of the Invention> Examples of the present invention will be described below with reference to FIGS. 2 and 3.

In FIG. 2, the same elements as those in FIG. 1 are given the same reference numerals to simplify the explanation.

In FIG. 2, reference numerals 21 and 22 indicate first and second accumulators disposed above the heat receiving section 1. The lower spaces of these two accumulators 21 and 22 are connected to conduits 23 and 23, respectively.
21, it is connected to the inlet of the heat receiving section 10, that is, the liquid pipe 11. Further, the upper spaces of the two accumulators 21 and 22 are connected to the outlet of the heat receiving section 1, that is, the steam pipe 12, through pipes 29 and 30, respectively. Further, the upper space of one of the accumulators 21 is connected to the one side circulation port of the heat radiation part 2 via the pipe line 31, and the upper space of the other accumulator 22 is connected to the pipe line 3.
2 to the other side circulation port of the heat radiating section 2. Reference numerals 27 and 28 indicate first and second on-off valves, 25 and 26, which are interposed in the pipes 29 and 30, respectively, as on-off means.
are interposed in the conduits 23 and 24, respectively, and the accumulator 2
These are first and second check valves through which fluid flows only from the first and second check valves 1 and 22 toward the heat receiving section 2.

In the heat transfer device having such a configuration, there is no liquid receiver 4, on-off valve 6, and siphon 10 as shown in FIG.

Note that the first on-off valve 27 and the second on-off valve 28 are opened and closed alternately, so that they are never opened or closed at the same time.

Next, the operation of this heat transfer device will be explained.

In the figure, the vapor flow is shown by a dotted line arrow, and the liquid flow is shown by a solid line arrow when the first on-off valve 2T is open and the second on-off valve 28 is closed. In this case, since the heat receiving part 1 and the first accumulator 21 are in communication with each other through the first on-off valve 27 which is in the open state, the liquid in the first accumulator 21 is caused by the action of gravity to flow through the first check valve. It flows into the heat receiving part 1 through 25, receives heat and evaporates. The evaporated steam passes through the steam pipe 12, the first on-off valve 27, and the pipe 2B, flows into the first accumulator 21, and after being separated into gas and liquid, flows through the pipe 31 to the heat radiation section 2, where it is cooled. It is condensed into liquid and releases heat. The liquefied liquid is forced out into the vapor stream and flows through the pipe 32'! i- and flows into the second accumulator 22 where it is stored. At this time, the second on-off valve 28 has an internal pressure, so steam does not flow directly into the second accumulator 22 from the heat receiving part 1, and all of the evaporative heat in the heat receiving part 1 flows to the heat radiating part 2. It turns out.

Next, when the flow rate in the first accumulator 21 has decreased to a certain extent, the opening and closing valves 27 and 28 are switched to open and close, and the first accumulator 21 is opened and closed.
When the second on-off valve 27 is closed and the second on-off valve 28 is opened, completely opposite steam and liquid flows occur, and the second accumulator 22
After the liquid evaporates in the heat receiving part 1, it flows through the pipe 32 to the heat radiating part 2, releases heat, and becomes liquefied. The liquefied liquid flows backward through the pipe 31 and is accumulated in the first accumulator 21. Next, when the opening and closing of both on-off valves 27 and 28 is switched, the original state is returned again.

As described above, by switching the first and second on-off valves 27 and 28 to move the liquid between the first and second accumulators 21 and 22, the liquid is transferred from the heat receiving part 1 to the heat radiating part 2. It is possible to perform heat transport continuously, reduce pulsation of heat transport, and increase heat transport efficiency.

Therefore, the first and second check valves 23.24 and the first and second on-off valves 27.28 as on-off means allow the working fluid condensed in the heat radiation section to flow into one accumulator and the other. Means, which is an object of the present invention, is configured to alternately perform the operation of circulating the fluid in the accumulator to the heat receiving part for each accumulator.

In the embodiment described above, the on-off valves 27 and 28't were used as the means for opening and closing the pipes 29 and 30.
It may also be configured by a three-way valve interposed at the confluence of the two conduits 29 and 30. In addition, on-off valves that are opened and closed in synchronization with the first and second on-off valves 27.28 are interposed in the conduit 23.24, respectively, in place of the first and second check valves 25.26. Of course, it is good to do so.

Further, the opening and closing of the first and second on-off valves 27.28 or switching of the above-mentioned three-way valve may be performed at regular intervals by a time switch or the like, or by the accumulator 21.2.
It is recommended that this be done by detecting the liquid level in 2.

As a means for detecting the liquid level, a float valve 41 as shown in FIG. 3 is preferably used.

That is, this float valve 41 is a combination of the first accumulator 21 and the first on-off valve 2T in FIG.
The inner side has a double pipe structure, and the liquid flowing from the pipe 31 is once stored in the outer container 42 and placed in a predetermined groove.
The structure is such that the water flows into the interior and pushes up the float 45. When the float 45 floats, the valve 46 is not opened, and the steam from the pipe 27 passes through the containers 44 and 42 and flows out from the pipe 31. At the same time, the liquid in the inner container 44 flows through the pipe 23. leak. As a result, it has the function of an accumulator and an on-off valve as shown in FIG.

When using the float valve 41, the accumulator 21.
Since the valve 46 closes before the liquid in the heat receiving part 22 is completely exhausted, there is no shortage of liquid in the heat receiving part 1, and overheating of the heat receiving part 1 can be prevented, increasing the reliability of the device and the heat transport efficiency. This will result in the effect of

<Effects of the Invention> As explained above, according to the present invention, by providing two accumulators and configuring the working fluid to alternately flow back to the heat receiving section from the accumulators, the pulsation of heat transport can be reduced. This makes it possible to improve the efficiency of heat transport and obtain a highly reliable device.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an example of a conventional heat transfer device, Fig. 2 is a schematic diagram showing an embodiment of the heat transfer device according to the present invention, and Fig. 3 is a longitudinal sectional view showing an example of a float valve. be. 1...Heat receiving part 2...Heat radiating part 21.22...Accumulator 23.24.29.30...Pipe line 25
．． 26...Check valve 27.2B...Opening/closing valve agent
Masuo Oiwa (and 2 others) Figure 1

Claims (4)

[Claims] (1) In a heat transfer device that transports heat from a heat receiving section to a heat radiating section by circulating a condensable working fluid as a heat transporting medium sealed inside a pipe, two accumulators are arranged above the heat receiving section. The lower space of each of the two accumulators is communicated with the inlet of the heat receiving section, and the upper space of each of the two accumulators is communicated with the outlet of the heat receiving section through a pipe, and the upper space of one of the accumulators is communicated with the inlet of the heat receiving section. The upper space of the other accumulator and the other side circulation port of the heat radiating section are communicated through pipes, respectively, and the working fluid condensed in the heat radiating section is communicated with one side of the heat radiating section. 1. A heat transfer device comprising means for alternately causing fluid in one accumulator to flow into the other accumulator and causing fluid in the other accumulator to flow back to the heat receiving section. (2) The means comprises an opening/closing means for selectively opening and closing pipes that communicate the lower space inside the accumulator and the heat receiving section, and the lower space inside the accumulator and the heat receiving section, respectively. The heat transfer device described. (3) The opening/closing means is not limited to the opening/closing valves installed in each pipeline, but the two opening/closing valves on the same accumulator side are opened and closed in the same state, and the two Q opening/closing valves on one accumulator side are opened/closed. 3. The heat transfer device according to claim 2, wherein the opening and closing state of the on-off valve on the other accumulator side is opposite to that of the on-off valve on the other accumulator side. (4) The opening/closing means is a three-way valve interposed at the confluence of the pipes between the accumulator and the heat receiving section.
Heat transfer device as described in section. l! 5) The means includes a check valve that is interposed in each of the pipes that communicate the lower space inside the accumulator and the heat receiving section, and allows fluid to flow only from the accumulator toward the heat receiving section; 2. The heat transfer device according to claim 1, further comprising: opening/closing means for selectively opening and closing the pipe lines communicating with each other.