Evaporator loop heat pipe

Abstract

The utility model relates to the field of loop heat pipes, in particular to an evaporator loop heat pipe which comprises an evaporator, a condenser and a liquid storage device, a capillary core is arranged in the evaporator and divides the interior of the evaporator into an upper cavity and a lower cavity, and the liquid storage device is communicated with the upper cavity through a liquid pipeline. According to the loop heat pipe of the evaporator, the size of the channel can be changed by changing the number of the filling strips blocking the water flow grooves, namely, the capacity of liquid flowing into the capillary core in unit time is changed, namely, the storage capacity between the capillary core and the upper cavity is reduced, and therefore the heat exchange efficiency of the evaporator is improved. The liquid flows through the capillary core before vaporization, the working medium phase change time of the liquid is prolonged, and the service life of the loop heat pipe is prolonged. And the flow of the liquid can be adjusted according to various air temperature environments, so that the liquid can flow through the capillary core before being vaporized. And meanwhile, the filling strips can also achieve the effects of thickening the outer wall and blocking heat, so that the heat directly acting on the liquid is reduced.

Description

Technical Field

[0001] This utility model relates to the field of loop heat pipes, specifically to an 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. The key to solving this problem lies in ensuring the liquid vaporizes directly through the capillary wick before the phase change. Therefore, an evaporator loop heat pipe needs to be designed to allow the liquid to flow through the capillary wick before vaporization, and to adjust the flow rate according to various temperature conditions to guarantee this pre-vaporization flow. Utility Model Content

[0005] The purpose of this invention is to provide an evaporator loop heat pipe.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An evaporator loop heat pipe is provided, including an evaporator, a condenser, and a liquid receiver. The evaporator has a capillary wick inside, which divides the interior of the evaporator into an upper chamber and a lower chamber. The liquid receiver is connected to the upper chamber through a liquid line. The condenser's air inlet is connected to the lower chamber through a steam line. The condenser's liquid outlet is connected to the interior of the liquid receiver. The bottom of the evaporator is in contact with a heat source. An upper retaining block is fixedly installed in the upper chamber. A water flow groove is opened at the bottom of the upper retaining block and is connected to the liquid line. Multiple filling strips are detachably installed in the water flow groove.

[0008] 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.

[0009] 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.

[0010] 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 pipeline.

[0011] 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.

[0012] Furthermore, the liquid receiver is installed at a higher height than the evaporator.

[0013] Furthermore, an exhaust pipe is provided on the outer edge of the outer shell. The exhaust pipe is inclined, with one end connected to the end of the collecting trough and the other end connected to the steam pipeline.

[0014] The beneficial effects of this invention are as follows: 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 working fluid phase change, and improving the service life of the loop heat pipe. Furthermore, the liquid flow rate can be adjusted according to various temperature environments to ensure that the liquid can flow 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

[0015] 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.

[0016] Figure 1 This is a top view of the present invention;

[0017] Figure 2 This is the front view of the present invention;

[0018] Figure 3 This is a cross-sectional view of the evaporator;

[0019] Figure 4 An exploded view of the evaporator's three-dimensional structure;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the heating plate;

[0021] Figure 6 This is a schematic diagram of the three-dimensional structure of the top cover;

[0022] In the diagram: 1. Evaporator; 1a. Capillary wick; 1b. Heating plate; 1b1. Lower retaining block; 1b2. Airflow channel; 1b3. Collection channel; 1c. Top cover; 1c1. Upper retaining block; 1c2. Water flow channel; 1d. Outer shell; 1e. Filler strip; 1f. Sealing ring; 2. Condenser; 3. Liquid receiver; 4. Steam line; 5. Liquid line. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] 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.

[0025] Reference Figures 1 to 6 The evaporator loop heat pipe shown includes an evaporator 1, a condenser 2, and a liquid receiver 3. The 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 receiver 3 is connected to the upper chamber through a liquid line 5. The air inlet of the condenser 2 is connected to the lower chamber through a steam line 4. The liquid outlet of the condenser 2 is connected to the interior of the liquid receiver 3. The bottom of the evaporator 1 is in contact with a heat source. An upper clamping block 1c1 is fixedly installed in the upper chamber. A water flow groove 1c2 is opened at the bottom of the upper clamping block 1c1 and is connected to the liquid line 5. Multiple filling strips 1e are detachably installed in the water flow groove 1c2. Liquid flows out of the reservoir 3 and along the liquid line 5 into the evaporator 1. It then flows downward through the airflow channel 1b2 into the capillary wick 1a. As the liquid flows in and drips to the bottom of the inner edge of the evaporator 1, it vaporizes instantly, cooling the heating plate 1b. By changing the number of filling strips 1e that block 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.

[0026] 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, and the multiple filling strips 1e are inserted and filled from the outside to the inside. Figure 6 As shown, the number of water flow channels 1c2 that can supply liquid flow can be changed according to the required flow rate, thereby reducing the contact area between the liquid and the capillary core 1a, which changes the flow rate. At the same time, the filling strip 1e can also thicken the outer wall to block heat, reducing the direct heat effect on the liquid.

[0027] 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.

[0028] 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 pipeline 4. The lower retaining block 1b1 supports the capillary wick 1a, and the collecting groove 1b3 allows the vaporized liquid to enter the steam pipeline 4 along the collecting groove 1b3.

[0029] 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.

[0030] like Figure 2 As shown, the installation height of the liquid receiver 3 is higher than that of the evaporator 1 so that the liquid flowing out of the liquid receiver 3 can enter the evaporator 1.

[0031] like Figure 3 As shown, an exhaust pipe is provided on the outer edge of the outer casing 1d. The exhaust pipe is inclined, with one end connected to the end of the collecting groove 1b3 and the other end connected to the steam pipeline 4. The inclined structure is mainly due to the limitation of the installation position, which makes this design the only option. At the same time, this design allows the sealing ring 1f to be closer to the inner cavity of the outer casing 1d.

[0032] 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. An evaporator loop heat pipe, characterized in that, The device includes an evaporator (1), a condenser (2), and a liquid receiver (3). The evaporator (1) is equipped with a capillary wick (1a), which divides the interior of the evaporator (1) into an upper chamber and a lower chamber. The liquid receiver (3) is connected to the upper chamber through a liquid pipeline (5). The air inlet of the condenser (2) is connected to the lower chamber through a steam pipeline (4). The liquid outlet of the condenser (2) is connected to the interior of the liquid receiver (3). The bottom of the evaporator (1) is in contact with a heat source. An upper clamping block (1c1) is fixedly installed in the upper chamber. A water flow groove (1c2) is opened at the bottom of the upper clamping block (1c1), and the water flow groove (1c2) is connected to the liquid pipeline (5). Multiple filling strips (1e) are detachably installed in the water flow groove (1c2).

2. The evaporator loop heat pipe as described in claim 1, 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.

3. The evaporator loop heat pipe as described in claim 1, 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.

4. An evaporator loop heat pipe as described in claim 3, 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 pipeline (4).

5. An evaporator loop heat pipe as described in claim 3, 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.

6. The evaporator loop heat pipe as described in claim 1, characterized in that, The installation height of the liquid receiver (3) is higher than that of the evaporator (1).

7. An evaporator loop heat pipe as described in claim 4, characterized in that, An exhaust pipe is provided on the outer edge of the outer shell (1d). The exhaust pipe is inclined and one end of the exhaust pipe is connected to the end of the collecting trough (1b3). The other end of the exhaust pipe is connected to the steam pipeline (4).

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