KR102233280B1 - Cryogenic loop heat-pipe with pulsating heat-pipe - Google Patents

Abstract

The present invention relates to a cryogenic loop heat pipe with a pulsating heat pipe, which comprises: a condensing member connected to a freezer with a preset temperature to condense introduced gas and to change the phase of the gas into liquid; a main loop module connected to the condensing member to evaporate the condensed liquid and to transfer the liquid to the condensing member; a sub loop module, respectively connected to the main loop module and the condensing member to transfer heat by using the change in the phase of working fluid; and heating members, respectively installed on a part of the main loop module and a part of the sub loop module, to respectively supply a heat source to the main loop module and the sub loop module. The sub loop module employs a pulsating heat pipe to transfer the heat source by using pulsation. The present invention aims to transfer heat by liquefaction/gasification of working fluid.

Description

Cryogenic roof heat pipe with vibration type heat pipe {CRYOGENIC LOOP HEAT-PIPE WITH PULSATING HEAT-PIPE}

The present invention is a loop heat pipe to which a vibration type heat pipe for use in a cryogenic environment is applied, supplying nitrogen to the inside of the loop heat pipe at room temperature, cooling it to a cryogenic temperature through a refrigerator, and applying a heat source to change the phase of nitrogen. It relates to a cryogenic loop heat pipe to which a vibration type heat pipe that circulates a loop is applied.

Various electronic devices such as computers and servers are provided with electronic components such as CPUs and semiconductor chips, and such electronic components generate a lot of heat during operation. Since such electronic products are usually designed to function properly at room temperature, if the heat generated during operation cannot be effectively cooled, its performance is significantly degraded, and in some cases, the product may be damaged.

As electronic products become slimmer, the installation gap between electronic components that generate heat during operation is continuing to narrow, and thus the heat generated when using electronic products is not properly cooled. In addition, due to the high integration and high performance of electronic parts, the heat generation load of electronic parts is continuously increasing, and thus, there is a problem that the electronic parts cannot be effectively cooled with the conventional cooling method.

As a new technology to solve this problem, the introduction of a phase change heat transport system capable of cooling electronic components having a high heat load density per unit has recently been expanded.

An example of such a phase change heat transfer system is a cylindrical heat pipe. A typical cylindrical heat pipe is a method of cooling by circulating a working fluid using a capillary pumping force of a sintered wick (wick) installed on the inner wall of the pipe.

When heat is received from the heat source, the working fluid contained in the sintering wick vaporizes and moves along the vapor flow, and then liquefied again while taking away heat from the heat sink, and then moving the sintered wick along the liquid flow by the capillary pumping force and circulating. do.

However, in the case of the heat pipe, although the dependence on the gravitational field is low, if the condensation part is located below the evaporation part in the gravitational field, the heat transport capacity is greatly reduced, and the positional relationship between the components is limited. There is a disadvantage in that it acts as a constraint on the structure of the electronic product adopted as a method.

In addition, in the cylindrical heat pipe, since vapor and liquid flow in opposite directions within a straight pipe, vapor and liquid may be mixed in the middle of the pipe. There is also a big problem in that such mixing makes the amount of heat actually transferred considerably less than the amount of heat that can be transferred in theory.

A looped heat pipe (LHP) system is proposed as an ideal heat transfer system capable of solving these problems, that is, problems due to space and location constraints, and problems due to mixing between vapor and liquid.

The loop-type heat pipe system is a type of CPL (Capillary Pumped Loop Heat Pipe) technology developed by NASA in the United States to cool large amounts of heat generated from communication equipment or electronic equipment for satellites.

In the conventional loop type heat pipe system, a condenser, an evaporator, and a vapor line and a liquid line connecting them are connected to each other to form a loop. The evaporator is provided with a compensation chamber that receives and buffers the liquefied working fluid before the working fluid permeates with the sintered wick provided therein. In the case of a roof-type heat pipe system, unlike a conventional linear heat pipe, a sintering wick is installed only in the evaporator.

The principle of operation of the roof-type heat pipe system of this configuration is as follows.

First, when the heat transfer plate of the evaporator in contact with a heat source such as a heating element is heated, the working fluid that has penetrated into the sintering wick by heat transferred from the heat transfer plate is heated to the saturation temperature and changes into a gas phase.

At this time, the generated gas is moved to the condenser along a steam line connected to one side of the evaporator. Subsequently, when the gas passes through the condenser and is liquefied by releasing heat to the outside, the liquefied working fluid is moved back to the evaporator along the liquid line connected to the condenser to repeat the above process, thereby cooling the heat source.

In the loop-type heat pipe system, the force that causes the movement of the working fluid is the capillary pumping force of the wick. However, this capillary pumping force is related to the pore diameter formed in the sintered wick.

That is, as the diameter of the pores formed in the sintered wick decreases, the capillary pumping force increases. However, as the diameter of the pores decreases, there is a problem in that the flow resistance of the sintered wick increases and the permeability decreases. Therefore, it is impossible to achieve the desired cooling performance by adjusting only the size of the pores of the sintered wick.

In the end, the evaporator used in the loop heat pipe system has developed a configuration that increases the capillary pumping power and does not decrease the permeability, in relation to the configuration of the sintered wick provided therein, so that the circulation of the working fluid is made more effectively. There is a need to do it.

Korean Patent Registration No. 10-1422097

Accordingly, the present invention was devised to solve the above problems, and the problem to be solved of the present invention is divided into a main loop and a sub loop, in each loop, a condenser, a liquid pipe line, a steam pipe line, an evaporator, and a compensation. It is to provide a cryogenic loop heat pipe to which a vibration type heat pipe equipped with a seal is applied.

Another object of the present invention is to apply a vibration type heat pipe to the evaporator, install a heater in the high temperature part of the evaporator, and connect the low temperature part to the condenser to transfer heat by liquefaction/evaporation of the working fluid due to the temperature difference between the low temperature part and the high temperature part. It is to provide a cryogenic loop heat pipe to which a vibration type heat pipe is applied.

However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those of ordinary skill in the technical field to which the present invention belongs from the following description. It will be understandable.

The present invention has been created to improve the problems of the prior art as described above, as a cryogenic loop heat pipe to which a vibration type heat pipe is applied, comprising: a condensing member connected to a refrigerator having a set temperature and condensing the incoming gas to phase change into a liquid; A main roof module connected to the condensing member to evaporate the condensed liquid and transfer the condensed liquid to the condensing member; A sub-loop module connected to the main roof module and the condensing member to transfer heat using a phase change of the working fluid; And a heating member respectively installed at a portion of the main roof module and the sub-loop module to supply heat sources to the main roof module and the sub-loop module, respectively, wherein the sub-loop module vibrates by applying a vibration-type heat pipe. The heat source can be moved by using.

In addition, the main roof module may include a main liquid piping line connected to the condensing member to induce transfer of the liquid condensed from the condensing member to the outside; A main evaporator for evaporating the liquid transferred from the main liquid piping line with heat; And a main gas piping line for inducing transfer of the vapor evaporated from the main evaporator to the condensing member.

In addition, the sub-loop module includes: a sub-evaporator to which a vibration-type heat pipe is applied to cause a phase change of the working fluid by the high-temperature portion and the low-temperature portion; A sub-liquid piping line connected to the main roof module to induce movement of the liquid to the sub-evaporator; And a sub-gas piping line for inducing transfer of the gas generated from the sub-evaporator to the condensing member.

In addition, it may further include a compensation chamber that is installed in a portion of the main roof module and the sub-loop module, supplying and supplementing the working fluid to the main roof module and the sub-loop module.

In addition, it may further include a gas nitrogen supply port connected to a portion of the main roof module to supply gaseous nitrogen to the main roof module.

In addition, it may further include; a pressure reduction tank located outside the thermal vacuum chamber in which the roof heat pipe is installed at room temperature to supply nitrogen, which is a working fluid, to the inside of the roof heat pipe.

In addition, the refrigerator provided in the thermal vacuum chamber may cool the condensing member to a set temperature by conduction cooling.

In addition, gaseous nitrogen, which is the working fluid in the main roof module, is condensed below the saturation temperature according to the internal pressure, circulates the sub-loop module by a heat source applied to the sub-evaporator, and the main liquid pipe from the condensing member. It may be supplied to the compensation chamber of the main evaporator through a line.

In addition, when the compensation chamber of the main evaporator is filled with a set amount of the working fluid, a heat source may be applied to the main evaporator to circulate the working fluid to the main roof module.

According to an embodiment of the present invention, the main evaporator, the condensing member, the main gas piping line, the main liquid piping line are connected to any one part of the main gas piping line and the main roof module connected in a closed loop manner to reduce gaseous nitrogen. It consists of a gas nitrogen supply port supplied to the main roof module, a sub-gas piping line connected to the main gas piping line between the main evaporator and the gas nitrogen supply port, and a sub-loop module with a sub-evaporator applied with a vibration type heat pipe connected in a closed loop method. It is characterized by that.

In addition, the main evaporator and the sub evaporator may include a compensation chamber for smoothly supplying liquid to the evaporator.

In addition, a vibration type heat pipe is applied to the sub-evaporator, and the high-temperature part of the sub-evaporator is installed with a heating member, and the low-temperature part is connected to the condensing member to transfer heat by liquefaction/evaporation of the working fluid due to the temperature difference between the low-temperature part and the high-temperature part. have.

However, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description. I will be able to.

The following drawings attached in the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention to be described later. It is limited only to and should not be interpreted.
1 is a schematic diagram showing a unit air conditioner using a conventional vibrating tubular heat pipe.
2 is a conceptual diagram of a cryogenic loop heat pipe to which a vibration type heat pipe according to an embodiment of the present invention is applied.
3 is a control block diagram of a cryogenic loop heat pipe controller to which a vibration type heat pipe according to an embodiment of the present invention is applied.
4 is a schematic diagram showing an equilibrium state (a) and an operating state (b) in a cryogenic loop heat pipe to which a vibration type heat pipe according to an embodiment of the present invention is applied.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be variously changed and have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereto.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from other components, and the scope of rights is not limited by these terms. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component. When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when a component is referred to as being "directly connected" to another component, it should be understood that there is no other component in the middle. On the other hand, other expressions describing the relationship between components, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "have" refer to the specified features, numbers, steps, actions, components, parts, or these. It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined. Terms defined in commonly used dictionaries should be interpreted as having meanings in the context of related technologies, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

2 is a conceptual diagram of a cryogenic loop heat pipe to which a vibration type heat pipe is applied according to an embodiment of the present invention, and FIG. 3 is a control block diagram of a cryogenic loop heat pipe controller to which a vibration type heat pipe is applied according to an embodiment of the present invention. 4 is a schematic diagram showing an equilibrium state (a) and an operating state (b) in a cryogenic loop heat pipe to which a vibration-type heat pipe according to an embodiment of the present invention is applied.

2 to 4, as a cryogenic loop heat pipe to which a vibration type heat pipe is applied, the present invention is a condensing member 100, a main roof module 200, a sub-loop module 300, and a heat generating member 400 It may include.

The condensing member 100 is connected to a refrigerator (not shown) of a set temperature and may condense the incoming gas and change it into a liquid phase. Specifically, the condensing member 100 may be connected to a cryogenic refrigerator having a set temperature to induce a phase change while condensing gas flowing at a low temperature.

The main roof module 200 may be connected to the condensing member 100 to evaporate the condensed liquid and transfer it to the condensing member 100.

The main roof module 200 may include a main liquid piping line 210, a main evaporator 220, and a main gas piping line 230.

The main liquid piping line 210 is connected to the condensing member 100 to induce transfer of the liquid condensed in the condensing member 100 to the outside.

The main evaporator 220 may evaporate the liquid transferred from the main liquid piping line 210 with heat.

The main gas piping line 230 may induce transfer of the vapor evaporated from the main evaporator 220 to the condensing member 100.

The sub-loop module 300 is connected to the main roof module 200 and the condensing member 100, respectively, and may transfer heat by using a phase change of the working fluid.

The sub roof module 300 may include a sub evaporator 310, a sub liquid pipe line 320, and a sub gas pipe line 330.

The sub-evaporator 310 is applied with a vibration type heat pipe, so that a phase change of the working fluid may be caused by the high-temperature portion and the low-temperature portion.

Specifically, as shown in Figure 4, Figure 4 (a) is a state of equilibrium of the vibration type heat pipe. In the maintained state, the working fluid maintains an equilibrium state at the saturated vapor pressure by forming a vapor phase part of a vapor bubble.

When one part is heated (heated) or cooled (cooled) in a stationary state, and air is flowed in the other part for heating or cooling purposes, bubbles are generated and the equilibrium state collapses as shown in Fig. 4(b) due to volume expansion or contraction. As the vapor plug or liquid plug moves, heating or cooling is performed.

The sub-liquid piping line 320 may be connected to the main roof module 200 to induce movement of the liquid to the sub evaporator 310. Specifically, the sub-liquid piping line 320 may be connected between the main evaporator 220 and the sub evaporator 310 to induce movement of the working fluid to the main evaporator 220 and the sub evaporator 310.

The sub-gas piping line 330 may induce transport of the gas generated from the sub evaporator 310 to the condensing member 100.

The heating member 400 may be installed on a part of the main roof module 200 and the sub roof module 300, respectively, to supply heat sources to the main roof module 200 and the sub roof module 300, respectively. Specifically, the heating member 400 may be a heater. Specifically, the heating member 400 may be installed in a part of the sub-evaporator 310, that is, a vibration-type heat pipe is applied to the sub-evaporator 310, and the high-temperature portion of the sub-evaporator 310 is the heating member 400 Is installed, and the low temperature part is connected to the condensing member 100 to transfer heat by liquefaction/evaporation of the working fluid due to a temperature difference between the low temperature part and the high temperature part.

The cryogenic roof heat pipe 10 to which the vibration type heat pipe according to an embodiment of the present invention is applied may further include a compensation chamber 500, a gas nitrogen supply port 600, and a pressure reduction tank 700.

The compensation chamber 500 may be installed on a part of the main loop module 200 and the sub loop module 300 and supplement by supplying a working fluid to the main roof module 200 and the sub loop module 300. Specifically, the compensation chamber 500 is installed on a part of the main evaporator 220 of the main roof module 200 and the sub evaporator 310 of the sub loop module 300, respectively, and the main evaporator of the main roof module 200 By supplying the working fluid to the sub-evaporator 310 of the 220 and the sub-loop module 300, it is possible to continuously supplement and supply the working fluid to the loop heat pipe of the present invention.

The gaseous nitrogen supply port 600 may be connected to a part of the main roof module 200 to supply gaseous nitrogen to the main roof module 200. Specifically, the gaseous nitrogen supply port 600 is connected to a part of the main gas piping line 230 of the main roof module 200 to supply gaseous nitrogen to the main roof module 200 through the main gas piping line 230. I can.

The pressure reduction tank 700 may be located outside a thermal vacuum chamber (not shown) in which the roof heat pipe 10 at room temperature is installed, and may supply nitrogen, which is a working fluid, into the roof heat pipe 10.

A refrigerator (not shown) provided in the thermal vacuum chamber (not shown) may cool the condensing member 100 to a set temperature by conduction cooling. Accordingly, the roof heat pipe 10 can be cooled to a cryogenic temperature in the same manner as described above.

The gaseous nitrogen, which is the working fluid in the main roof module 200, is condensed below the saturation temperature according to the internal pressure, circulates the sub-loop module 300 by the heat source applied to the sub-evaporator 310, and the condensing member 100 ) May be supplied to the compensation chamber 500 of the main evaporator 220 through the main liquid piping line 210.

Specifically, gaseous nitrogen, which is the working fluid in the main roof module 200, is condensed below the saturation temperature according to the internal pressure, and the condensed liquid nitrogen is applied to the sub-loop module 300 by a heat source applied to the sub-evaporator 310. Circulates, is transferred to the condensing member, and is supplied to the compensation chamber 500 while being transferred from the condensing member 100 to the main evaporator 220 through the main liquid piping line 210 to continuously supplement the roof heat pipe 10 Can be supplied.

When the working fluid is filled in the compensation chamber 500 of the main evaporator 220 to a set amount, a heat source is applied to the main evaporator 220 to circulate the working fluid to the main roof module 200. Specifically, when the working fluid is sufficiently filled in the compensation chamber 500 of the main evaporator 220 to a set amount, a heat source may be applied to the main evaporator 220 to circulate the working fluid to the main roof module 200. Therefore, it is possible to operate the cryogenic roof heat pipe 10 by the above operation.

In addition, the cryogenic loop heat pipe 10 to which the vibration type heat pipe according to an embodiment of the present invention is applied may further include a controller.

The controller 30 is connected to the condensing member 100, the main roof module 200, the sub-loop module 300, the heating member 400, and the pressure reduction tank 700, respectively, and the condensing member 100, the main roof module It is possible to control the operation of 200, the sub-loop module 300, the heating member 400, and the pressure reduction tank 700.

The controller 30 is equipped with a wireless communication module, and is interlocked with any one of a Wi-Fi communication module, a Bluetooth communication module, and a ZigBee communication module, such as an external mobile terminal, so that the operation control situation can be recognized in real time from outside.

According to an embodiment of the present invention, the main evaporator 220, the condensing member 100, the main gas piping line 230, the main liquid piping line 210, including the main roof module 200 connected in a closed loop method. And between the gaseous nitrogen supply port 600 and the main evaporator 220 and the gaseous nitrogen supply port 600 which are connected to any one part of the main gas pipe line 230 to supply gaseous nitrogen to the main roof module 200. It is characterized in that the sub-gas piping line 330 connected to the main gas piping line 230 and the sub-evaporator 310 to which the vibration type heat pipe is applied are formed of a sub-loop module 300 connected in a closed loop manner.

In addition, the main evaporator 220 and the sub evaporator 310 may include a compensation chamber 500 for smoothly supplying liquid to each of the evaporators 220 and 310.

In addition, a vibration type heat pipe is applied to the sub-evaporator 310, and the high-temperature part of the sub-evaporator 310 is installed with a heating member 400, and the low-temperature part is connected to the condensing member 100 to operate by the temperature difference between the low-temperature part and the high-temperature part. Heat can be transferred by liquefaction/vaporization of the fluid.

Detailed description of the preferred embodiments of the present invention disclosed as described above has been provided to enable those skilled in the art to implement and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will understand that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, those skilled in the art may use the configurations described in the above-described embodiments in a manner that combines them with each other. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention. The invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, an embodiment may be configured by combining claims that do not have an explicit citation relationship in the claims, or may be included as a new claim by amendment after filing.

10: roof heat pipe
30: controller
100: condensing member
200: main roof module
210: main liquid piping line
220: main evaporator
230: main gas piping line
300: sub loop module
310: sub evaporator
320: sub-liquid piping line
330: sub-gas piping line
400: heating member
500: compensation chamber
600: gaseous nitrogen supply port
700: pressure reduction tank

Claims (9)

This is a cryogenic loop heat pipe with a vibration type heat pipe
A condensing member connected to a refrigerator having a set temperature and condensing the incoming gas to phase change into a liquid;
A main roof module connected to the condensing member to evaporate the condensed liquid and transfer the condensed liquid to the condensing member;
A sub-loop module connected to the main roof module and the condensing member to transfer heat using a phase change of the working fluid; And
Including; heating members respectively installed on a portion of the main roof module and the sub-loop module to supply heat sources to the main roof module and the sub-loop module, respectively, and
The sub-loop module is applied with a vibration type heat pipe to move the heat source using vibration,
The main roof module,
A main liquid piping line connected to the condensing member to induce transfer of the liquid condensed in the condensing member to the outside;
A main evaporator for evaporating the liquid transferred from the main liquid piping line with heat; And
Including; a main gas piping line for inducing the transfer of the vapor evaporated from the main evaporator to the condensing member,
The sub loop module,
A sub-evaporator to which a vibration-type heat pipe is applied to cause a phase change of the working fluid by the high-temperature and low-temperature parts;
A sub-liquid piping line connected to the main roof module to induce movement of the liquid to the sub-evaporator; And
Including; a sub-gas piping line for inducing the transfer of the gas generated from the sub evaporator to the condensing member,
Compensation chamber installed in a portion of the main loop module and the sub-loop module, supplying and replenishing the working fluid to the main loop module and the sub-loop module; Including,
The sub-liquid piping line is connected between the main evaporator and the sub evaporator to induce movement of the working fluid to the main evaporator and the sub evaporator,
The high temperature part of the sub evaporator is provided with the heating member, the low temperature part is connected to the condensing member to transfer heat by liquefaction or vaporization of the working fluid due to the temperature difference between the low temperature part and the high temperature part,
The compensation chambers are respectively installed at a portion of the main evaporator and the sub evaporator to continuously supply a working fluid to the main evaporator and the sub evaporator,
When the compensation chamber is filled with a set amount of a working fluid, a heat source is applied to the main evaporator to circulate the working fluid to the main roof module.
delete delete delete The method according to claim 1,
A cryogenic loop heat pipe to which a vibration type heat pipe is applied, further comprising a gas nitrogen supply port connected to a part of the main roof module to supply gaseous nitrogen to the main roof module.
The method of claim 5,
A pressure reduction tank located outside the thermal vacuum chamber in which the roof heat pipe is installed at room temperature to supply nitrogen, which is a working fluid, to the inside of the roof heat pipe; pipe.
The method of claim 6,
The cryocooler provided in the thermal vacuum chamber cools the condensing member to a set temperature by conduction cooling.
delete The method according to claim 1,
When the working fluid is filled in the compensation chamber of the main evaporator to a set amount, a heat source is applied to the main evaporator to circulate the working fluid to the main roof module.

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