CN208671755U - A kind of loop circuit heat pipe - Google Patents

Abstract

A kind of loop circuit heat pipe, including evaporator, gas line, condenser, liquid line and compensator, it is characterized in that, the condenser is micro-channel condenser, the micro-channel condenser includes the first header, the second header and at least one flat tube, there are more microchannels along Working fluid flow direction in the flat tube, first header is connected to two open ends of the every flat tube with second header, first header is connected with the gas line, and second header is connected with the liquid line.The flow stability of the utility model loop circuit heat pipe enhances, the pressure loss reduces, heat-sinking capability and efficiency greatly improve, the temperature difference that radiates reduces, it is particularly suitable for high-power heat-dissipation demand, more advanced solution is provided for the increasingly serious heat dissipation problem of power electronic product, there is biggish economic value.

Description

A kind of loop circuit heat pipe

Technical field

The utility model belongs to technical field of heat exchange, is related to a kind of heat-exchanger rig, especially a kind of loop circuit heat pipe.

Background technique

Loop circuit heat pipe is a kind of outstanding heat for growing up to meet the increasingly complicated and harsh thermal control demand of spacecraft Control product.Loop circuit heat pipe not only has the series of advantages of conventional heat pipe, but also has heat-transfer capability big, and heat transfer temperature difference is small, right The advantages such as gravity is insensitive.Therefore loop circuit heat pipe is particularly suitable for solving the problems, such as the high efficiency and heat radiation of ground installation, especially high power The increasingly serious heat dissipation problem of power electronic product has very big application potential.

There are five elements for loop circuit heat pipe, are respectively: evaporator, gas line, condenser, liquid line and benefit Repay device.This five parts are sequentially connected, constitute closed loop, inside have working medium circulation flowing.When evaporator heat absorption, liquid Working medium is in the capillary structure surface vaporization being located in evaporator, to generate the driving force of working medium circulation.Because the driving force is logical Often less than 0.1Mpa, so, the excessively high pressure loss can seriously reduce the heat-transfer capability and heat transfer efficiency of loop circuit heat pipe, cause it Cold and hot temperature difference between the two ends increase.The problem is especially prominent when loop circuit heat pipe transmission heat is larger.And the pressure loss in condenser It is the main source of the entire loop circuit heat pipe pressure loss.

The loop circuit heat pipe condenser of current visible report uses two kinds of forms: circular pipe type and tablet notch type substantially.Circle It is excessive to directly result in the pressure loss usually within 5mm for its caliber of trumpet cooler.And gravity can be reinforced in pipe by increasing caliber Working medium condenses the influence of nowed forming, in turn results in loop circuit heat pipe job insecurity.Circular pipe type condenser has another disadvantage that The combined process of its outer wall and radiating fin is complicated, and contact area is small, and thermal contact resistance is high.And the air-cooled coefficient of heat transfer is low, works as heat dissipation When measuring larger, very big condensation area is needed, complex process is bulky, practical not applicable.Plate notch type condenser due to Its complex process, it is at high cost, so size is typically limited within 100mm × 100mm, it is suitble to using the collection such as water cooling or refrigeration machine Chinese style cold source, heat output are generally also smaller.

In conclusion for loop circuit heat pipe because being limited by condenser structure, the advantages such as heat output is big, heat transfer temperature difference is small are difficult at present It is practical not to be able to satisfy high power radiation demand to play.And micro-channel heat exchanger technical maturity, light weight and cost are low, are applied to Loop circuit heat pipe can make loop circuit heat pipe overcome the problems, such as drawbacks described above for solving the high power radiation in Ground Application.

Summary of the invention

In order to solve the problems, such as current loop circuit heat pipe because its condenser structure causes performance bad, the utility model proposes A kind of loop circuit heat pipe, the utility model loop circuit heat pipe use micro-channel condenser.The flowing of the utility model loop circuit heat pipe is stablized Property enhancing, the pressure loss reduces, and heat-sinking capability and efficiency greatly improves, and the heat dissipation temperature difference reduces, and being particularly suitable for high-power heat-dissipation needs It asks, provides more advanced solution for the increasingly serious heat dissipation problem of power electronic product, there is biggish economic value.

The utility model adopts the following technical solution:

A kind of loop circuit heat pipe, including evaporator, gas line, condenser, liquid line and compensator, which is characterized in that The condenser is micro-channel condenser, and the micro-channel condenser includes the first header, the second header and at least one Flat tube, the flat tube is interior to have more microchannels along Working fluid flow direction, and first header and second header connect Lead to two open ends of the every flat tube, first header is connected with the gas line, second header with The liquid line is connected.

The micro-channel condenser has single or multiple working medium flows.

The quantity for the flat tube for including in the multiple working medium flow can be identical or different.

It can along axial direction in the settable one or more air inlet pipe of axial direction, second header on first header One or more outlet tubes are set.

The micro-channel condenser with the more flat tubes, in first header and second header The inside of at least one header at least one liquid separatnig plate for gas-liquid separation is set.

The micro-channel condenser with the single flat tube, along Working fluid flow direction, in the rear part of the flat tube At least one is used for the liquid separatnig plate of gas-liquid separation for upper setting, and the external package shell of the liquid separatnig plate is to be connected to by the liquid separatnig plate Two sections of the front and back of the flat tube separated.

The liquid separatnig plate is sintered by metal powder or wire mesh.

Along Working fluid flow direction there are also pipeline section after the last one described liquid separatnig plate, the pipeline section can be the flat tube or The portions of first header described in person and at least one header in second header.

The flat tube is in flat or any curved shape.

The outer surface of the flat tube can lay fin.

The utility model has the beneficial effects that

(1), several microchannel flowings being arranged side by side, the single microchannel along flat tube of the working medium in loop circuit heat pipe condenser Hydraulic diameter it is small, the enhancing of surface tension effect facilitate inhibit gravity influence, ensure that working medium in single microchannel The stability of flowing is condensed, and then enhances the stability of loop circuit heat pipe flowing.

(2), include a plurality of microchannel in single flat tube, increase effectively actual internal area, reduce the pressure in condenser Power loss.And more flat tubes can be in parallel, further decreases the pressure loss.It is excessive to loop circuit heat pipe biography to eliminate the pressure loss The limitation of thermal energy power.And the pressure loss reduces the pressure difference in the then evaporator and condenser of loop circuit heat pipe and reduces.Based on saturation work The corresponding relationship of matter pressure and temperature, pressure difference reduce then working medium and reduce in evaporation and saturation temperature difference when condensation, i.e. loop The temperature difference of heat pipe evaporation ends and condensation end reduces, and heat transfer efficiency improves.

(3), to meet bigger heat-sinking capability, bigger condenser, more flat tubes are needed.Since the working medium in condenser is in Gas-liquid two-phase state easily causes flow and distributes unevenness between different flat tubes in parallel, the influence is with simultaneously under the influence of gravitational field Connection flat tube number increases and aggravates.Using multipaths micro-channel condenser, the number of parallel connection flat tube is less in each process, drop The non-uniform degree of assignment of traffic in the low process.And multiple processes can connect, every series connection is primary, and working medium is once mixed Conjunction is redistributed again, so the assignment of traffic of working medium is more uniform.

(4), the heat exchange area of flat tube is big and is easily effectively combined with fin, increases effectively compared to traditional round trumpet cooler Fin heat exchange area, it is significant for using the air-cooled heat dissipation occasion as direct cold source to influence, can effectively reduce loop circuit heat pipe with Heat transfer temperature difference between cold source improves radiating efficiency.

(5), micro-channel condenser is equipped with one or more liquid separatnig plates, and loop circuit heat pipe working medium is carried out gas-liquid point by liquid separatnig plate From.And further cool down liquid working substance there are also portions after the last one liquid separatnig plate along Working fluid flow direction, it was formed Cold degree.The liquid refrigerant of loop circuit heat pipe is subcooled, and can make up for it leakage heat of the evaporator to compensator, makes its operation is stable.

(6), micro-channel condenser technical maturity, light weight and cost are low, and being applied to loop circuit heat pipe has significant economic effect Benefit.

The flow stability of the beneficial effect as brought by above-mentioned micro-channel condenser, the utility model loop circuit heat pipe increases By force, the pressure loss reduces, and heat-sinking capability and efficiency greatly improve, and the heat dissipation temperature difference reduces, and is particularly suitable for high-power heat-dissipation demand, is The increasingly serious heat dissipation problem of power electronic product provides more advanced solution, has biggish economic value.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of micro-channel condenser first embodiment described in the utility model；

Fig. 2 is the A-A sectional view in Fig. 1；

Fig. 3 is the structural schematic diagram of micro-channel condenser second embodiment described in the utility model；

Fig. 4 is the structural schematic diagram of micro-channel condenser 3rd embodiment described in the utility model；

Fig. 5 is a kind of structural schematic diagram of the first embodiment of loop circuit heat pipe of the utility model；

Fig. 6 is a kind of structural schematic diagram of the second embodiment of loop circuit heat pipe of the utility model；

Fig. 7 is a kind of structural schematic diagram of the 3rd embodiment of loop circuit heat pipe of the utility model.

In the above figure: 10- micro-channel condenser, the first header of 11-, the second header of 12-, 13- flat tube, 14- are micro- logical Road, 15- fin, 16- liquid separatnig plate, 17- shell, 18- air inlet pipe, 19- outlet tube, 20- total inlet pipe, 21- divide journey plate.

1- evaporator, 2- gas line, 3- liquid line, 4- compensator, 5- blower.

Specific embodiment

It elaborates with reference to the accompanying drawing to the embodiments of the present invention.The present embodiment is with the utility model skill Implemented under premised on art scheme, the detailed implementation method and specific operation process are given, but the guarantor of the utility model Shield range is not limited to the following embodiments.

Micro-channel condenser first embodiment: as depicted in figs. 1 and 2, micro-channel condenser 10 has single working medium flow, Including the first header 11, the second header 12 and single flat tube 13.First header 11 is connected to flat tube with the second header 12 13 two open ends.More microchannels 14 are arranged with along Working fluid flow direction inside flat tube 13.The serpentine-like arrangement of flat tube 13, thereon Fin 15 is laid to increase heat exchange area.Along Working fluid flow direction, it is provided on the rear part of flat tube 13 for gas-liquid separation Liquid separatnig plate 16.The external of liquid separatnig plate 16 wraps up shell 17, before shell 17 is used to be connected to the flat tube 13 separated by liquid separatnig plate 16 Two sections afterwards.Liquid separatnig plate 16 is sintered by metal powder or wire mesh.

Micro-channel condenser second embodiment: as shown in figure 3, micro-channel condenser 10 has single working medium flow, including First header 11, the flat tube 13 of the second header 12 and Duo Gen parallel arrangement.First header 11 and the second header 12 connect Lead to two open ends of every flat tube 13.Flat tube 13 is in flat, and structure is the same as above-mentioned micro-channel condenser first embodiment.Second Header 12 is internally provided with two liquid separatnig plates 16 for gas-liquid separation.Liquid separatnig plate 16 is sintered by metal powder or wire mesh It forms.There are also the portions of the second header 12 behind liquid separatnig plate 16.Set two air inlet pipe 18 on first header 11, two into Tracheae 18 is connected by total inlet pipe 21, and an outlet tube 19 is set on the second header 12.

Micro-channel condenser 3rd embodiment: as shown in figure 4, micro-channel condenser 10 has multiple working medium flows, including First header 11, the second header 12 and more flat tubes 13.First header 11 be connected to the second header 12 every it is flat Two open ends of pipe 13.Several points of journeys are arranged perpendicular to Working fluid flow direction in edge inside first header 11 and the second header 12 Plate 21.Point journey plate 21 divides micro-channel condenser 10 for a, tri- processes of b, c.It include three in parallel in process a and process b Flat tube 13, process c interior includes two flat tubes 13 in parallel.Process a, process b and process c are serially connected.The structure of flat tube 13 is same Above-mentioned micro-channel condenser second embodiment.First header 11 is internally provided with the liquid separatnig plate 16 for gas-liquid separation.Liquid separation Plate 16 is sintered by metal powder or wire mesh.There are also two flat tubes 13 in parallel behind liquid separatnig plate 16.First header An air inlet pipe 18 is set on 11, and an outlet tube 19 is set on the second header 12.

Fig. 5 is a kind of structural schematic diagram of the first embodiment of loop circuit heat pipe of the utility model.It includes evaporator 1, gas Fluid line 2, micro-channel condenser 10, liquid line 3 and compensator 4.Above-mentioned component is sequentially connected composition loop circuit heat pipe.Its In, the structure of micro-channel condenser 10 is the same as above-mentioned micro-channel condenser first embodiment.

Its basic functional principle is as follows: the working medium in loop circuit heat pipe is after 1 interior suction hot vapour of evaporator, in gas-liquid interface Two sides form capillary pressure difference.The pressure-driven steam passes through gas line 2 first, then flows into microchannel by the first header 11 Condenser 10.It flows several microchannels 14 being arranged side by side inside flat tube 13.In flow process, gas working medium is changed with environment Heat is gradually condensed into liquid refrigerant.By 16 gas-liquid separation of liquid separatnig plate, liquid refrigerant continuation exchanges heat in flat tube 13, is formed Cold liquid.Then by 12 influent pipeline 3 of the second header, then it is back to compensator 4.Final liquid passes through evaporator Capillary structure in 1 returns to last time vaporization position, enters subsequent cycle after vaporizing again.

Since the hydraulic diameter of single microchannel 14 is small, the enhancing of surface tension effect helps to inhibit the influence of gravity, It ensure that working medium condenses the stability of flowing in single microchannel 14, and then enhance the stability of loop circuit heat pipe flowing.

Include a plurality of microchannel 14 in single flat tube 13, increases effectively actual internal area, reduce in condenser 10 The pressure loss thereby reduces the pressure loss in entire loop circuit heat pipe, and it is excessive to loop circuit heat pipe heat transfer to eliminate the pressure loss The limitation of ability.

The pressure loss reduces the pressure difference in the then evaporator 1 of loop circuit heat pipe and condenser 10 and reduces.Based on saturation working medium pressure The corresponding relationship of power and temperature, pressure difference reduce then working medium and reduce in evaporation and saturation temperature difference when condensation, i.e. loop circuit heat pipe The temperature difference of evaporator 1 and condenser 10 reduces.And 13 heat exchange area of flat tube is big and easily effectively combines with fin 15, compared to tradition Circular pipe type condenser increases effectively fin heat exchange area, aobvious for using the air-cooled heat dissipation occasion as direct cold source to influence It writes, the heat transfer temperature difference between loop circuit heat pipe condensation end and cold source can be further decreased.In this way, changing between loop circuit heat pipe and cold source The hot temperature difference substantially reduces, and radiating efficiency is improved.

Working medium gas-liquid separation not only ensure that into liquid line 3 be liquid refrigerant by liquid separatnig plate 16, and the part liquid State working medium continues in micro-channel condenser 10 and environment is radiated with sensible heat, obtains certain degree of supercooling.The liquid work of loop circuit heat pipe Matter supercooling can make up for it leakage heat of the evaporator 1 to compensator 4, make its operation is stable.

Fig. 6 is a kind of structural schematic diagram of the second embodiment of loop circuit heat pipe of the utility model.It includes evaporator 1, gas Fluid line 2, micro-channel condenser 10, liquid line 3 and compensator 4.Above-mentioned component is sequentially connected composition loop circuit heat pipe.Its In, the structure of micro-channel condenser 10 is the same as above-mentioned micro-channel condenser second embodiment.Working medium is in micro-channel condenser 10 Mobility status: working medium enters two air inlet pipe 18 by total inlet pipe 21, subsequently into the first header 11.It is in parallel flat along more Microchannel 14 inside pipe 13 is flowed, and in flow process, gas working medium and environment exchange heat, and is gradually condensed into liquid refrigerant.Work Mass flow carries out gas-liquid separation through two liquid separatnig plates 16 on the second header 12, and liquid refrigerant continues heat exchange to supercooling shape later State, influent pipeline 3 are then back to compensator 4.5 forced air of blower and micro-channel condenser 10 exchange heat.The present embodiment The working principle of loop circuit heat pipe other parts is similar with a kind of first embodiment of loop circuit heat pipe of above-mentioned the utility model, no longer superfluous It states.

Because using the form in parallel of more flat tubes 13, the drag losses in the present embodiment loop circuit heat pipe further drop It is low.Its brought beneficial effect is seldom made herein with described in a kind of first embodiment of loop circuit heat pipe of above-mentioned the utility model Explanation.

Fig. 7 is a kind of structural schematic diagram of the 3rd embodiment of loop circuit heat pipe of the utility model.It includes evaporator 1, gas Fluid line 2, micro-channel condenser 10, liquid line 3 and compensator 4.Above-mentioned component is sequentially connected composition loop circuit heat pipe.Its In, the structure of micro-channel condenser 10 is the same as above-mentioned micro-channel condenser 3rd embodiment.Working medium is in micro-channel condenser 10 Flowing: working medium enters the first header 11 by air inlet pipe 18, and under the action of dividing journey plate 21, working medium sequentially flows through process a, process B and process c, in flow process, gas working medium and environment exchange heat, and liquid refrigerant are gradually condensed into, by the first header 11 In liquid separatnig plate 16, after gas-liquid separation, working medium continues to exchange heat in two flat tubes 13 in process c, becomes subcooled liquid, later Influent pipeline 3 is then back to compensator 4.5 forced air of blower and micro-channel condenser 10 exchange heat.The present embodiment ring The working principle and the beneficial effect as brought by micro-channel heat exchanger of road heat pipe other parts are the same as above-mentioned the utility model one Described in the first embodiment of kind loop circuit heat pipe, seldom explain herein.

Micro-channel condenser 3rd embodiment is also particularly well suited for the biggish loop circuit heat pipe of thermic load.To meet bigger heat dissipation Ability needs bigger condenser area, more flat tubes 13.Since working medium is in gas-liquid two-phase state in condenser, in gravitational field Under the influence of, it easily causes flow and distributes unevenness between different flat tubes 13 in parallel, which increases with 13 number of flat tube in parallel And aggravate.Therefore, using micro-channel condenser 3rd embodiment, with multiple processes, working medium sequentially flows through process a, process b With process c, the number of flat tube 13 in parallel is less in each process, reduces the non-uniform degree of assignment of traffic in the process.And And process a, process b and process c connect, every series connection is primary, and working medium carries out mixed once, then redistributes, so the stream of working medium Amount distribution is more uniform.

Described in a kind of first embodiment of loop circuit heat pipe of synthesis the utility model, second embodiment and 3rd embodiment, this The flow stability of utility model loop circuit heat pipe enhances, and the pressure loss reduces, and heat-sinking capability and efficiency greatly improve, and radiate the temperature difference Reduce, is particularly suitable for high-power heat-dissipation demand, provides more advanced solution for the increasingly serious heat dissipation problem of power electronic product Certainly scheme has biggish economic value.

Claims (10)

1. a kind of loop circuit heat pipe, including evaporator, gas line, condenser, liquid line and compensator, which is characterized in that institute Stating condenser is micro-channel condenser, and the micro-channel condenser includes that the first header, the second header and at least one are flat Pipe, the flat tube is interior to have more microchannels along Working fluid flow direction, and first header is connected to second header Two open ends of the every flat tube, first header are connected with the gas line, second header and institute Liquid line is stated to be connected.

2. a kind of loop circuit heat pipe according to claim 1, it is characterised in that:

Wherein, the micro-channel condenser has single or multiple working medium flows.

3. a kind of loop circuit heat pipe according to claim 2, it is characterised in that:

Wherein, the quantity for the flat tube for including in the multiple working medium flow can be identical or different.

4. a kind of loop circuit heat pipe according to claim 1, it is characterised in that:

Wherein, on first header in axial settable one or more air inlet pipe, second header along axial direction Settable one or more outlet tube.

5. a kind of loop circuit heat pipe according to claim 1, it is characterised in that:

Wherein, with the micro-channel condenser of the more flat tubes, in first header and second header In the inside of at least one header at least one liquid separatnig plate for gas-liquid separation is set.

6. a kind of loop circuit heat pipe according to claim 1, it is characterised in that:

Wherein, with the micro-channel condenser of the single flat tube, along Working fluid flow direction, in the rear part of the flat tube At least one is used for the liquid separatnig plate of gas-liquid separation for upper setting, and the external package shell of the liquid separatnig plate is to be connected to by the liquid separatnig plate Two sections of the front and back of the flat tube separated.

7. a kind of loop circuit heat pipe according to claim 5 or 6, it is characterised in that:

Wherein, the liquid separatnig plate is sintered by metal powder or wire mesh.

8. a kind of loop circuit heat pipe according to claim 5 or 6, it is characterised in that:

Wherein, along Working fluid flow direction, also pipeline section, the pipeline section can be the flat tube after the last one described liquid separatnig plate Or the portions of at least one header in first header and second header.

9. a kind of loop circuit heat pipe according to claim 1, it is characterised in that:

Wherein, the flat tube is in flat or any curved shape.

10. a kind of loop circuit heat pipe according to claim 1, it is characterised in that:

Wherein, the outer surface of the flat tube can lay fin.