CN213811889U

CN213811889U - Gravity circulation type phase change temperature control device

Info

Publication number: CN213811889U
Application number: CN202022600492.1U
Authority: CN
Inventors: 王胜男; 巩云; 姚景生; 袁艳平; 吴金文; 曾明虹; 曾甫海; 王岳怡
Original assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Current assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-07-27
Anticipated expiration: 2030-11-11

Abstract

The utility model provides a gravity circulation type phase change temperature control device without consuming electric energy, which relates to a temperature control device. The gravity circulation type phase change temperature control device comprises a phase change energy storage cavity filled with a phase change material and an evaporation pool filled with a liquid working medium, wherein the phase change energy storage cavity and the evaporation pool are arranged in a sealing mode, the phase change energy storage cavity is arranged above the evaporation pool, a vertically arranged hollow fin is arranged in the phase change material, a plurality of heat conduction fins distributed along the height direction of the hollow fin are arranged on the side surface of the hollow fin, the bottom of an inner cavity of the hollow fin is communicated with the evaporation pool to serve as a vacuum cooling channel, and an inlet of the vacuum cooling channel is located above a liquid level in the evaporation pool. The utility model discloses the device start-up speed is fast, and whole heat transfer efficiency is high, and the gravity heat pipe does not have overheated phenomenon, need not consume extra electric energy.

Description

Gravity circulation type phase change temperature control device

Technical Field

The utility model relates to a temperature control device, specificly relate to a circulating phase transition temperature control device of gravity.

Background

The railway 'four-electricity' room is a technical room for communication, signal, electric power and electrification equipment, and is an important guarantee for stable, reliable and safe operation of various systems such as railway communication, information and the like. Various devices in the machine room run uninterruptedly and emit a large amount of heat, the temperature of a main machine room of the information machine room (during shutdown) is controlled to be 5-35 ℃, and the temperature of the main machine room (during startup) is controlled to be 22-24 ℃. In the design of a four-electricity air conditioning system in a machine room, in order to improve the reliability of the design of the air conditioning system in the machine room, a common scheme is to adopt a redundancy design, for example, two sets of air conditioning systems are generally designed for a medium-sized and small-sized data machine room, the operation strategy is that each set of air conditioning system operates according to 50% of refrigerating capacity, and when one set of equipment fails, the other set of equipment operates according to 100% of refrigerating capacity. The system solves the problem of possible equipment failure, but cannot solve the problem that the air conditioning system cannot operate due to equipment outage. In some remote areas, once an emergency power-off accident occurs, the two air conditioning systems cannot work normally, so that the temperature in the four-electricity machine room rises rapidly, the safe operation of the unit and other process equipment in the machine room is greatly influenced, and even the safety of the whole railway system is possibly influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a need not to consume the circulating phase transition temperature control device of gravity of electric energy is provided.

The utility model provides a technical scheme that its technical problem adopted is: the gravity circulation type phase change temperature control device comprises a phase change energy storage cavity filled with a phase change material and an evaporation pool filled with a liquid working medium, wherein the phase change energy storage cavity and the evaporation pool are arranged in a sealing mode, the phase change energy storage cavity is arranged above the evaporation pool, a vertically arranged hollow fin is arranged in the phase change material, a plurality of heat conduction fins distributed along the height direction of the hollow fin are arranged on the side surface of the hollow fin, the bottom of an inner cavity of the hollow fin is communicated with the evaporation pool to serve as a vacuum cooling channel, and an inlet of the vacuum cooling channel is located above a liquid level in the evaporation pool.

Further, the heat conduction fins are arranged at equal intervals along the height direction of the hollow fins.

Further, the heat conduction fins are also of a hollow structure and are horizontally arranged, and the inner cavities of the heat conduction fins are communicated with the inner cavities of the hollow fins.

Furthermore, the heat conduction fin is formed by buckling and connecting an upper buckling plate and a lower buckling plate which are arranged up and down, and the upper buckling plate is arranged in a corrugated shape.

Furthermore, the hollow fins are multiple pieces and are uniformly arranged in the phase-change material so as to divide the phase-change material into multiple phase-change units, and the heat-conducting fins arranged on two opposite side surfaces of every two adjacent hollow fins are arranged in a staggered manner.

Furthermore, the hollow fins and the heat conducting fins are both made of copper or copper alloy materials.

Furthermore, the phase change energy storage cavity and the evaporation pool are both made of copper or copper alloy materials.

The utility model has the advantages that: the utility model discloses a circulating phase transition temperature control device of gravity, wherein empty fin and evaporation pond intercommunication form the gravity heat pipe, when temperature regulating device bottom and rack upper surface contact, working medium absorbs the rack and gives out heat in the evaporation pond, the working medium evaporation is the gaseous phase, gaseous working medium flows to cavity fin top through the siphon action, with the phase change material heat transfer, the heat is finally stored in phase change material, in order to realize room temperature control, the device start-up speed is fast, whole heat transfer efficiency is high, can effectively avoid the overheated phenomenon of gravity heat pipe, need not consume extra electric energy.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a schematic view of a hollow fin structure according to an embodiment of the present invention

Shown in the figure: the phase-change energy storage device comprises a phase-change energy storage cavity 1, an evaporation pond 2, hollow fins 3, a vacuum cooling channel 4, heat conducting fins 5, phase-change materials 11, a phase-change unit 12, a liquid working medium 21, a vacuum cooling channel inlet 41, an upper buckle plate 51 and a lower buckle plate 52.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1 and fig. 2, the gravity circulation phase change temperature control device of the present invention comprises a phase change energy storage cavity 1 filled with phase change material 11 and an evaporation pool 2 filled with liquid working medium 21. The phase-change material 11 can be paraffin/expanded graphite composite phase-change material, and the liquid working medium 21 can be one of water, ethanol, ammonia and the like. Phase change energy storage cavity 1 and evaporation pond 2 are all airtight setting, phase change energy storage cavity 1 sets up evaporation pond 2 top, bury the hollow fin 3 of vertical setting underground in the phase change material 11, hollow fin 3 side is equipped with the heat conduction fin 5 that the polylith was arranged along this hollow fin direction of height, hollow fin 3's inner chamber bottom with evaporation pond 2 is linked together to when as vacuum cooling passageway 4 (liquid working medium does not evaporate, be the vacuum state in this passageway), vacuum cooling passageway entry 41 is located liquid level top in the evaporation pond 2.

When the device is used, the device is placed on the top of a cabinet (a heating object). The phase-change material can absorb or emit a large amount of heat in the phase-change process, the device adopts the phase-change material as a heat-absorbing temperature-control material, the heat of the cabinet is transferred to the liquid working medium 21 in the evaporation tank through the tank wall of the evaporation tank, the liquid working medium 21 absorbs the heat and evaporates, the steam working medium enters the hollow fins 3 from the vacuum cooling channel inlet 41, moves upwards along the inner cavities of the hollow fins 3 and reaches the tops of the hollow fins, and exchanges heat with the phase-change material 11 in contact with the outside, the phase-change material absorbs the heat and liquefies, the steam working medium releases the heat and condenses, the condensed liquid working medium is attached to the inner walls of the hollow fins 3 and flows back to the evaporation tank 2 under the action of gravity, and the liquid working medium in the device is always kept in a saturated isothermal state under the whole working state. The temperature of the phase-change material is kept unchanged in the process, so that heat energy of the cabinet is continuously converted into latent heat to be stored, the purpose of controlling the temperature of the cabinet is achieved, the device can operate without electric energy, and the problem of difficulty in temperature control under the condition of sudden power failure of a machine room is solved. Wherein, the heat conduction fin 5 mainly plays a role in enhancing the heat exchange efficiency of the steam working medium and the phase-change material.

The embodiment of the utility model provides an in, heat conduction fin 5 is arranged along 3 direction of height equidistance of hollow fin. Thus, compared with uneven arrangement, even arrangement is beneficial to heat exchange between the steam working medium and the phase-change material.

As shown in fig. 3, in an embodiment of the present invention, the heat conducting fins 5 are also hollow structures, the heat conducting fins 5 are horizontally disposed, and the inner cavities of the heat conducting fins 5 are communicated with the inner cavities of the hollow fins 3. Thus, the steam working medium can enter the heat-conducting fins 5 from the inside of the hollow fins, so that the contact area with the phase-change material 11 is increased. The heat conducting fins 5 are horizontally arranged, so that the steam working medium cannot be gathered in the inner cavities of the heat conducting fins 5 after being condensed, and of course, the heat conducting fins 5 can also be slightly inclined upwards (the height of one end of each heat conducting fin 5 connected with the hollow fins 3 is low, and the height of the other end of each heat conducting fin 5 is high). The heat conducting fins 5 are formed by buckling and connecting an upper buckling plate 51 and a lower buckling plate 52 which are arranged up and down, the upper buckling plate 51 is arranged in a corrugated manner, and the lower buckling plate 52 can be a flat plate or a corrugated plate, preferably the flat plate so that liquid can flow back to the evaporation pool. So, heat conduction fin processing is convenient, simultaneously, because upper pinch plate 51 is the corrugate, the area of contact of increase steam working medium that can be further and phase change material to improve cooling efficiency.

The hollow fin 3 can be one piece or a plurality of pieces, and is set according to the actual situation. The embodiment of the utility model provides an in, hollow fin 3 is the multi-disc to evenly arrange in phase change material 11, hollow fin 3's width and height and 1 cavity width of phase change energy storage cavity and height are equivalent, in order to cut apart into a plurality of phase change unit 12 in with phase change material. When the hollow fins 3 are multiple, preferably, the heat conducting fins 5 arranged on the two opposite side surfaces of the two adjacent hollow fins 3 are arranged in a staggered manner, so that compared with the one-to-one arrangement of the heat conducting fins 5 arranged on the two opposite side surfaces of the two adjacent hollow fins 3, the cooling efficiency of the structure is highest on the same volume.

In order to improve the heat transfer efficiency, the hollow fins 3 and the heat conducting fins 5 are both made of metal copper or copper alloy materials with high heat conductivity coefficients; the phase-change energy storage cavity 1 and the evaporation pool 2 are made of copper or copper alloy materials with high preheating and uniform heat conductivity coefficients.

Claims

1. Gravity circulation type phase change temperature control device, which is characterized in that: the phase change energy storage device comprises a phase change energy storage cavity (1) filled with a phase change material (11) and an evaporation pool (2) filled with a liquid working medium (21), wherein the phase change energy storage cavity (1) and the evaporation pool (2) are arranged in an airtight mode, the phase change energy storage cavity (1) is arranged above the evaporation pool (2), hollow fins (3) vertically arranged are arranged in the phase change material (11), heat conduction fins (5) are arranged on the side faces of the hollow fins (3) along the height direction of the hollow fins, the bottom of inner cavities of the hollow fins (3) is communicated with the evaporation pool (2) to serve as vacuum cooling channels (4), and vacuum cooling channel inlets (41) are located above the liquid level in the evaporation pool (2).

2. The gravity circulation type phase change temperature control device according to claim 1, wherein: the heat conducting fins (5) are arranged at equal intervals along the height direction of the hollow fins (3).

3. The gravity circulation type phase change temperature control device according to claim 1 or 2, characterized in that: the heat conduction fins (5) are also of hollow structures, the heat conduction fins (5) are horizontally arranged, and the inner cavities of the heat conduction fins (5) are communicated with the inner cavities of the hollow fins (3).

4. The gravity circulation type phase change temperature control device according to claim 3, wherein: the heat conduction fins (5) are formed by buckling and connecting an upper buckling plate (51) and a lower buckling plate (52) which are arranged from top to bottom, and the upper buckling plate (51) is arranged in a corrugated manner.

5. The gravity circulation type phase change temperature control device according to claim 4, wherein: the heat conduction fins (5) are arranged on two opposite side surfaces of every two adjacent hollow fins (3) in a staggered mode.

6. The gravity circulation type phase change temperature control device according to claim 1, wherein: the hollow fins (3) and the heat conduction fins (5) are both made of copper or copper alloy materials.

7. The gravity circulation type phase change temperature control device according to claim 1, wherein: the phase-change energy storage cavity (1) and the evaporation pool (2) are both made of copper or copper alloy materials.