Parallel multi-evaporator loop heat pipe

Abstract

The utility model relates to the field of loop heat pipes, in particular to a parallel type multi-evaporator loop heat pipe which comprises a plurality of evaporators, a condenser and a liquid storage device, capillary cores are arranged in the evaporators and divide the interiors of the evaporators into upper cavities and lower cavities, and a liquid pipeline comprises a liquid main pipeline and a plurality of liquid branch pipelines. According to the parallel type multi-evaporator loop heat pipe, when the number of heat sources changes, the number of the evaporators can be changed according to needs, and the steam pipelines and the liquid pipelines are designed to be of a detachable splicing structure, so that when the subsequent heat sources change, the length of the steam pipelines and the length of the liquid pipelines are not changed, and the number of the evaporators can be changed according to needs. And the length is correspondingly changed, so that the device can be suitable for being used in a multi-point heat source environment. And according to the evaporator loop heat pipe, the working medium phase change time of liquid is prolonged by changing the number of the filling strips blocking the water flow grooves, and the service life of the loop heat pipe is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of loop heat pipes, specifically to a parallel multi-evaporator loop heat pipe. Background Technology

[0002] A loop heat pipe has two important functions: absorbing heat from a heat source and providing power for the circulation of the working fluid. It contains a capillary wick, with axial channels on the outer side serving as vapor channels and liquid channels on the inner side. It mainly consists of an evaporator, a condenser, a receiver, vapor lines, and liquid lines.

[0003] Chinese patent application publication number: CN201020296533.6, title: Flat-plate loop heat pipe. It is mainly intended to solve the problem that due to the special structure of the evaporator of the plate loop heat pipe, the back heat conduction and side wall heat conduction are more serious. Even under very small heat load conditions, the back heat leakage of the evaporator can easily cause the working fluid to undergo a phase change in the liquid compensation chamber, which will lead to the failure of loop heat pipe to start up.

[0004] While this application addresses the issue of phase change in the liquid working fluid, its solution relies on top insulation, leaving the sides still exposed to heat. Over time, the phase change will still occur. A more effective solution would be to ensure the liquid vaporizes directly through the capillary wick before the phase change. Furthermore, this application only cools a single heat source, not multiple sources simultaneously. While the number of heat sources can be adjusted as needed, and the number of evaporators can be changed accordingly, the lengths of the steam and liquid pipes are designed to be fixed from the outset, making it difficult to adapt to changes in the heat source.

[0005] Therefore, it is necessary to design a parallel multi-evaporator loop heat pipe that allows the liquid to flow through the capillary wick before vaporization, and can adjust the liquid flow rate according to various temperature environments to ensure that the liquid flows through the capillary wick before vaporization. It can also be used in parallel to cool multiple heat sources simultaneously. Utility Model Content

[0006] The purpose of this invention is to provide a parallel multi-evaporator loop heat pipe.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A parallel multi-evaporator loop heat pipe is provided, comprising multiple evaporators, condensers, and a liquid receiver. Each evaporator has a capillary wick that divides its interior into an upper chamber and a lower chamber. The liquid pipeline includes a main liquid pipe and multiple branch liquid pipes. One end of each branch liquid pipe is connected to the outlet of the main liquid pipe, and the other end is connected to each of the multiple evaporators and the upper chamber. The inlet of the main liquid pipe is connected to the outlet of the liquid receiver. The steam pipeline includes a main steam pipe and multiple branch steam pipes. One end of each branch steam pipe is connected to the inlet of the main steam pipe, and the other end is connected to each of the multiple lower chambers. The outlet of the main steam pipe is connected to the inlet of the condenser. The outlet of the condenser is connected to the interior of the liquid receiver. The bottoms of the multiple evaporators are in contact with multiple heat sources.

[0009] Furthermore, the main steam pipeline includes multiple three-way gas pipes, multiple extension gas pipes, and a three-way main gas pipe. One end of the three-way main gas pipe is connected to the steam branch pipeline of the first evaporator, while the second end of the three-way main gas pipe is connected to the condenser. The third end of the three-way main gas pipe is connected to one end of the three-way gas pipe. The second end of the three-way gas pipe is connected to one end of the next three-way gas pipe through an extension gas pipe. The third end of the three-way gas pipe is connected to the steam branch pipeline of another evaporator. A sealing plate is provided at the end to seal the opening of the three-way gas pipe.

[0010] Furthermore, the main liquid pipeline includes multiple tee liquid pipes, multiple extension liquid pipes, and a tee main liquid pipe. One end of the tee main liquid pipe is connected to the liquid branch pipeline of the first evaporator, while the second end of the tee main liquid pipe is connected to the liquid reservoir. The third end of the tee main liquid pipe is connected to one end of the tee liquid pipe. The second end of the tee liquid pipe is connected to one end of the next tee liquid pipe through the extension liquid pipe. The third end of the tee liquid pipe is connected to the liquid branch pipeline of another evaporator. A sealing plate 2 is provided at the end to seal the opening of the tee liquid pipe.

[0011] Furthermore, an upper clamping block is fixedly installed in the upper chamber, and a water flow groove is opened at the bottom of the upper clamping block. The water flow groove is connected to the liquid branch pipe, and multiple filling strips are detachably installed in the water flow groove.

[0012] Furthermore, the bottom of the upper block is provided with multiple crisscrossing water flow channels, and multiple filling strips are inserted into the multiple horizontally distributed water flow channels, with the multiple filling strips gradually being inserted and filled from the outside to the inside.

[0013] Furthermore, the evaporator includes a heating plate, a top cover, and an outer shell. The top cover and the heating plate are fixedly installed at the upper and lower ends of the outer shell, respectively. The upper clamp and the top cover are integrally formed. A water inlet pipe is provided on the top cover. The bottom of the water inlet pipe passes through a water flow channel and is connected to the water flow channel. The bottom of the heating plate is in contact with the heat source.

[0014] Furthermore, a lower clamping block is fixedly installed on the heating plate. The top of the lower clamping block contacts the bottom of the capillary core. Multiple airflow grooves are opened on the lower clamping block. The multiple airflow grooves are connected through a collecting groove, and one end of the collecting groove passes through the lower clamping block and is connected to one end of the steam branch pipe.

[0015] Furthermore, a sealing ring is provided between the bottom of the outer shell and the heating plate, the sealing ring wraps around the central cavity of the outer shell, and a receiving groove is provided on the outer shell for the sealing ring to be inserted.

[0016] The beneficial effects of this utility model are as follows: When the number of heat sources changes, the number of evaporators can be changed as needed. The steam pipe and liquid pipe are designed as a detachable assembly structure, so that their length can be changed accordingly when the heat source changes, making it suitable for use in multi-point heat source environments.

[0017] Furthermore, by changing the number of packing strips blocking the water flow channels, the size of the channels can be altered, thus changing the volume of liquid flowing into the capillary wick per unit time. This reduces the storage capacity between the capillary wick and the upper chamber, allowing the liquid to flow through the capillary wick before vaporization, extending the time for the liquid to undergo a phase change and improving the lifespan of the loop heat pipe. The liquid flow rate can also be adjusted according to various temperature environments to ensure that the liquid flows through the capillary wick before vaporization. Simultaneously, the packing strips also thicken the outer wall to insulate against heat, reducing the direct heat transfer to the liquid. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 A three-dimensional structural diagram of a steam pipeline;

[0021] Figure 3 A three-dimensional structural diagram of a liquid pipeline;

[0022] Figure 4 This is a cross-sectional view of the evaporator;

[0023] Figure 5 An exploded view of the evaporator's three-dimensional structure;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the heating plate;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the top cover;

[0026] In the diagram: 1. Evaporator; 1a. Capillary wick; 1b. Heating plate; 1b1. Lower clamping block; 1b2. Airflow channel; 1b3. Collection channel; 1c. Top cover; 1c1. Upper clamping block; 1c2. Water flow channel; 1d. Outer shell; 1e. Filler strip; 1f. Sealing ring; 2. Condenser; 3. Liquid receiver; 4. Steam pipeline; 4a. Main steam pipeline; 4a1. T-junction gas pipe; 4a2. Extension gas pipe; 4a3. T-junction main gas pipe; 4b. Steam branch pipeline; 5. Liquid pipeline; 5a. Main liquid pipeline; 5a1. T-junction liquid pipe; 5a2. Extension liquid pipe; 5a3. T-junction main liquid pipe; 5b. Liquid branch pipeline. Detailed Implementation

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0029] Reference Figures 1 to 7The parallel multi-evaporator loop heat pipe shown includes multiple evaporators 1, condensers 2, and a liquid receiver 3. Each evaporator 1 has a capillary wick 1a that divides it into an upper chamber and a lower chamber. The liquid pipeline 5 includes a main liquid pipeline 5a and multiple branch liquid pipelines 5b. One end of each branch liquid pipeline 5b is connected to the outlet of the main liquid pipeline 5a, and the other end is connected to the upper chamber of each evaporator 1. The inlet of the main liquid pipeline 5a is connected to the outlet of the liquid receiver 3. Liquid discharged from the liquid receiver 3 is distributed by the main liquid pipeline 5a to the branch liquid pipelines 5b, and then from the branch liquid pipelines 5b to the upper chamber of the evaporator 1. Indoors, the steam pipeline 4 includes a main steam pipeline 4a and multiple branch steam pipelines 4b. One end of each branch pipeline 4b is connected to the inlet of the main steam pipeline 4a, and the other end is connected to multiple lower chambers. The outlet of the main steam pipeline 4a is connected to the inlet of the condenser 2, and the outlet of the condenser 2 is connected to the interior of the liquid receiver 3. Gas evaporated in the lower chambers flows along the main steam pipeline 4a into the branch steam pipelines 4b, and then is collected and transported to the condenser 2. The cooled gas returns to a liquid state and, propelled by subsequent gas flow, is transported to the liquid receiver 3. The bottoms of the multiple evaporators 1 are in contact with multiple heat sources. These heat sources are cooled by the liquid output from the liquid receiver 3. Gas from the multiple evaporators 1 can enter the condenser 2 for cooling. The volume of the liquid receiver 3 and the condenser 2 needs to be appropriately increased relative to the area of ​​a single evaporator 1.

[0030] In order to adjust the number of steam branch pipes 4b and liquid main pipes 5a according to the number of liquid storage tanks 3, and to change the overall length of the steam main pipes 4a and liquid main pipes 5a, the steam main pipe 4a includes multiple three-way gas pipes 4a1, multiple extension gas pipes 4a2, and a three-way main gas pipe 4a3. One end of the three-way main gas pipe 4a3 is connected to the steam branch pipe 4b of the first evaporator 1, and the second end of the three-way main gas pipe 4a3 is connected to the condenser 2. The third end of the three-way main gas pipe 4a3 is connected to one end of the three-way gas pipe 4a1. The second end of the three-way gas pipe 4a1 is connected to one end of the next three-way gas pipe 4a1 through the extension gas pipe 4a2. The third end of the three-way gas pipe 4a1 is connected to the steam branch pipe 4b of another evaporator 1. A sealing plate is provided at the end to seal the opening of the three-way gas pipe 4a1. Depending on the required number of evaporators 1, the number of three-way gas pipes 4a1, extension gas pipes 4a2, and steam branch pipes 4b can be increased or decreased, while simultaneously changing the length of the main steam pipe 4a. After the number is changed, the last three-way gas pipe 4a1 needs to be sealed by a sealing plate.

[0031] The main liquid pipeline 5a includes multiple three-way liquid pipes 5a1, multiple extension liquid pipes 5a2, and a three-way main liquid pipe 5a3. One end of the three-way main liquid pipe 5a3 is connected to the liquid branch pipeline 5b of the first evaporator 1, while the second end of the three-way main liquid pipe 5a3 is connected to the liquid reservoir 3. The third end of the three-way main liquid pipe 5a3 is connected to one end of the three-way liquid pipe 5a1. The second end of the three-way liquid pipe 5a1 is connected to one end of the next three-way liquid pipe 5a1 via an extension liquid pipe 5a2. The third end of the three-way liquid pipe 5a1 is connected to the liquid branch pipeline 5b of another evaporator 1. A sealing plate 2 is provided at the end of the three-way liquid pipe 5a1 to seal the opening. The number of three-way liquid pipes 5a1, extension liquid pipes 5a2, and liquid branch pipelines 5b can be increased or decreased according to the number of evaporators 1, thereby changing the length of the main liquid pipeline 5a. After the number is changed, the last three-way gas pipe 4a1 needs to be sealed by the sealing plate 1.

[0032] An upper retaining block 1c1 is fixedly installed in the upper chamber. A water flow channel 1c2 is formed at the bottom of the upper retaining block 1c1 and is connected to a liquid branch pipe 5b. Multiple packing strips 1e are detachably installed inside the water flow channel 1c2. Liquid flows out from the liquid reservoir 3 and along the liquid pipeline 5 into the evaporator 1. It then flows downwards through the airflow channel 1b2 into the capillary wick 1a. When the liquid flows in and drips to the bottom of the inner edge of the evaporator 1, it instantly vaporizes, cooling the heating plate 1b. By changing the number of packing strips 1e blocking the water flow channel 1c2, the size of the channel can be changed, thus changing the volume of liquid flowing into the capillary wick 1a per unit time.

[0033] The bottom of the upper block 1c1 has multiple crisscrossing water flow channels 1c2. Multiple filling strips 1e are inserted into the horizontally distributed water flow channels 1c2, with the filling strips 1e gradually inserted from the outside to the inside. The number of water flow channels 1c2 that can supply liquid flow can be changed according to the required flow rate, reducing the contact area between the liquid and the capillary wick 1a, thus changing the flow rate. At the same time, the filling strips 1e also thicken the outer wall to insulate against heat, reducing the direct heat effect on the liquid.

[0034] The evaporator 1 includes a heating plate 1b, a top cover 1c, and a shell 1d. The top cover 1c and the heating plate 1b are fixedly installed at the upper and lower ends of the shell 1d, respectively. The upper retaining block 1c1 and the top cover 1c are integrally formed. A water inlet pipe is provided on the top cover 1c, and the bottom of the water inlet pipe passes through a water flow channel 1c2, and the water inlet pipe is connected to the water flow channel 1c2, so that the liquid flowing in along the water inlet pipe can enter the water flow channel 1c2. The bottom of the heating plate 1b is in contact with the heat source. This split structure allows the capillary wick 1a to be installed, and the heat conduction efficiency of the split structure can be reduced, avoiding excessive heat being directly conducted to the shell 1d.

[0035] A lower retaining block 1b1 is fixedly installed on the heating plate 1b. The top of the lower retaining block 1b1 contacts the bottom of the capillary wick 1a. Multiple airflow grooves 1b2 are formed on the lower retaining block 1b1. The multiple airflow grooves 1b2 are connected by a collecting groove 1b3, and one end of the collecting groove 1b3 passes through the lower retaining block 1b1 and is connected to one end of the steam branch pipe 4b. The lower retaining block 1b1 supports the capillary wick 1a, and the collecting groove 1b3 allows gas to enter the steam pipeline 4 along the collecting groove 1b3.

[0036] A sealing ring 1f is provided between the bottom of the outer shell 1d and the heating plate 1b. The sealing ring 1f covers the central cavity of the outer shell 1d, and a receiving groove is provided on the outer shell 1d for the sealing ring 1f to be inserted into. The sealing ring 1f serves to seal the outer shell 1d and the heating plate 1b.

[0037] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A parallel multi-evaporator loop heat pipe, characterized in that, The system includes multiple evaporators (1), condensers (2), and a liquid receiver (3). Each evaporator (1) has a capillary wick (1a) inside, which divides the interior of the evaporator (1) into an upper chamber and a lower chamber. The liquid pipeline (5) includes a main liquid pipeline (5a) and multiple branch liquid pipelines (5b). One end of each branch liquid pipeline (5b) is connected to the outlet of the main liquid pipeline (5a), and the other end of each branch liquid pipeline (5b) is connected to the upper chamber of each evaporator (1). The main liquid pipeline (5a)... The inlet is connected to the outlet of the liquid storage tank (3). The steam pipeline (4) includes a main steam pipeline (4a) and multiple steam branch pipelines (4b). One end of the multiple steam branch pipelines (4b) is connected to the air inlet of the main steam pipeline (4a). The other end of the multiple steam branch pipelines (4b) is connected to multiple lower chambers respectively. The air outlet of the main steam pipeline (4a) is connected to the air inlet of the condenser (2). The liquid outlet of the condenser (2) is connected to the interior of the liquid storage tank (3). The bottom of the multiple evaporators (1) is in contact with multiple heat sources respectively.

2. A parallel multi-evaporator loop heat pipe as described in claim 1, characterized in that, The main steam pipe (4a) includes multiple three-way gas pipes (4a1), multiple extension gas pipes (4a2), and a three-way main gas pipe (4a3). One end of the three-way main gas pipe (4a3) is connected to the steam branch pipe (4b) of the first evaporator (1), and the second end of the three-way main gas pipe (4a3) is connected to the condenser (2). The third end of the three-way main gas pipe (4a3) is connected to one end of the three-way gas pipe (4a1). The second end of the three-way gas pipe (4a1) is connected to one end of the next three-way gas pipe (4a1) through the extension gas pipe (4a2). The third end of the three-way gas pipe (4a1) is connected to the steam branch pipe (4b) of another evaporator (1). A sealing plate is provided at the end to seal the opening of the three-way gas pipe (4a1).

3. A parallel multi-evaporator loop heat pipe as described in claim 1, characterized in that, The main liquid pipe (5a) includes multiple three-way liquid pipes (5a1), multiple extension liquid pipes (5a2), and a three-way main liquid pipe (5a3). One end of the three-way main liquid pipe (5a3) is connected to the liquid branch pipe (5b) of the first evaporator (1), and the second end of the three-way main liquid pipe (5a3) is connected to the liquid reservoir (3). The third end of the three-way main liquid pipe (5a3) is connected to one end of the three-way liquid pipe (5a1). The second end of the three-way liquid pipe (5a1) is connected to one end of the next three-way liquid pipe (5a1) through the extension liquid pipe (5a2). The third end of the three-way liquid pipe (5a1) is connected to the liquid branch pipe (5b) of another evaporator (1). A sealing plate 2 is provided at the end to seal the opening of the three-way liquid pipe (5a1).

4. A parallel multi-evaporator loop heat pipe as described in claim 1, characterized in that, An upper clamping block (1c1) is fixedly installed in the upper chamber. A water flow channel (1c2) is opened at the bottom of the upper clamping block (1c1), and the water flow channel (1c2) is connected to the liquid branch pipe (5b). Multiple filling strips (1e) are detachably installed in the water flow channel (1c2).

5. A parallel multi-evaporator loop heat pipe as described in claim 4, characterized in that, The bottom of the upper block (1c1) is provided with multiple crisscrossing water flow channels (1c2), and multiple filling strips (1e) are inserted into the multiple horizontally distributed water flow channels (1c2), and the multiple filling strips (1e) are inserted and filled from the outside to the inside.

6. A parallel multi-evaporator loop heat pipe as described in claim 4, characterized in that, The evaporator (1) includes a heating plate (1b), a top cover (1c) and a shell (1d). The top cover (1c) and the heating plate (1b) are fixedly installed at the upper and lower ends of the shell (1d), respectively. The upper clamp (1c1) and the top cover (1c) are integrally formed. A water inlet pipe is provided on the top cover (1c). The bottom of the water inlet pipe passes through the water flow channel (1c2) and is connected to the water flow channel (1c2). The bottom of the heating plate (1b) is in contact with the heat source.

7. A parallel multi-evaporator loop heat pipe as described in claim 5, characterized in that, A lower clamping block (1b1) is fixedly installed on the heating plate (1b). The top of the lower clamping block (1b1) contacts the bottom of the capillary core (1a). Multiple airflow grooves (1b2) are opened on the lower clamping block (1b1). The multiple airflow grooves (1b2) are connected through a collecting groove (1b3), and one end of the collecting groove (1b3) passes through the lower clamping block (1b1) and is connected to one end of the steam branch pipe (4b).

8. A parallel multi-evaporator loop heat pipe as described in claim 5, characterized in that, A sealing ring (1f) is provided between the bottom of the outer shell (1d) and the heating plate (1b). The sealing ring (1f) covers the central cavity of the outer shell (1d). A receiving groove is provided on the outer shell (1d) for the sealing ring (1f) to be inserted.

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