Heat pipe working medium filling device

Abstract

The utility model relates to heat pipe processing technical field discloses a kind of heat pipe working substance filling device, including being installed on bracket: clamping unit, for the stable clamping of heat pipe;Vacuumizing unit, for the vacuumizing of heat pipe inside after the clamping unit fixation;Working substance filling unit, for filling working substance to the heat pipe inside after vacuumizing;Hot pressing sealing unit, for the hot pressing sealing of heat pipe open end;Connecting unit, for the working substance filling unit or vacuumizing unit and heat pipe communication.The utility model is connected with working substance filling unit and vacuumizing unit by connecting unit, avoids the situation that gas leaks appears before working substance filling after vacuumizing, ensures the reliability of working substance filling, improves yield rate;Realize the effect of working substance filling to single-port heat pipe quickly.

Description

Technical Field

[0001] This utility model relates to the field of heat pipe processing technology, specifically, a heat pipe working fluid filling device. Background Technology

[0002] A heat pipe is a highly efficient heat transfer device widely used in electronic equipment, aerospace, computer cooling, and refrigeration systems. Its principle is based on the phase change process of liquid evaporation and condensation, enabling efficient heat transfer even with a small temperature difference. A heat pipe typically consists of a sealed tube, a working fluid, and capillary structures. The working fluid evaporates and absorbs heat at the heat source end; the vapor flows along the pipe to the cold end, where it condenses and releases heat. Through the capillary structure, the liquid returns to the heat source end, creating a continuous cycle that maintains effective heat transfer. With technological advancements, the application of heat pipes in various fields is gradually increasing, playing a particularly important role in electronic equipment requiring efficient heat dissipation.

[0003] The existing utility model patent with publication number CN213599897U provides a heat pipe working fluid filling device, including a heat pipe, a working fluid tank, a negative pressure vacuum pump, a negative pressure tube, a constant pressure tube, a heat exchange tube, an insulation layer, a heating section, an insulation section, a heat dissipation section, a liquid wick, a circulating heat dissipation chamber, heat pipe working fluid, and an electric valve. This patent can not only fill the heat pipe with working fluid, but also replace the working fluid according to the external working environment temperature. However, this patent is for filling a heat pipe with working fluid at both ends. Currently, some heat pipes are closed at one end and open at the other. In this case, leakage is prone to occur during the connection between vacuuming and working fluid filling processes, resulting in the vacuum level not meeting the requirements. Utility Model Content

[0004] The purpose of this invention is to provide a heat pipe working fluid filling device to solve the problem that existing equipment is prone to leakage when filling heat pipes with working fluid, resulting in the vacuum degree not meeting the requirements.

[0005] This utility model is achieved through the following technical solution: a heat pipe working fluid filling device, comprising a component mounted on a bracket: Clamping unit, used to stably clamp the heat pipe; A vacuum unit is used to evacuate the inside of the heat pipe after it has been fixed by the clamping unit. The working fluid filling unit is used to fill the heat pipe after it has been evacuated with working fluid; Thermo-sealing unit is used to thermo-seal the open end of the heat pipe; A connection unit is used to connect the working fluid filling unit or the vacuuming unit to the heat pipe; The connection unit includes an electromagnetic three-way valve, a vacuum tube, a working fluid transfer tube, and a heat pipe connection tube. The vacuum tube, working fluid transfer tube, and heat pipe connection tube are respectively connected to the three ports of the electromagnetic three-way valve. The vacuum tube is connected to the vacuum unit, the working fluid transfer tube is connected to the working fluid filling unit, and the heat pipe connection tube is used to connect to the heat pipe.

[0006] To better realize this utility model, it further includes an auxiliary sealing unit, which includes a mounting frame, a sealing cylinder, and a sealing plate. The mounting frame is mounted on the bracket, and multiple sealing cylinders are distributed around the mounting frame. The sealing plate is installed at the output end of the sealing cylinder, and the sealing plate is used to seal the contact gap between the heat pipe connecting pipe and the heat pipe.

[0007] To better realize this utility model, the vacuum tube is further provided with a first solenoid valve and a pressure gauge; the working fluid transmission tube is provided with a flow meter and a second solenoid valve.

[0008] To better realize this utility model, a reducing joint is detachably connected to the heat pipe connecting pipe, the reducing joint is in contact with the heat pipe, and the sealing plate is used to seal the contact gap between the reducing joint and the heat pipe.

[0009] To better realize this utility model, a collection box is further provided on the bracket, and the collection box is located directly below the heat pipe.

[0010] To better realize this utility model, the hot-press sealing unit further includes two sealing hydraulic cylinders symmetrically mounted on the bracket, and an electric heating block is installed at the output end of the sealing hydraulic cylinder. The electric heating block is used to heat and squeeze the wall of the hot pipe.

[0011] To better realize this utility model, the clamping unit further includes two clamping parts symmetrically installed on the bracket. Each clamping part includes a clamping cylinder, a pressure plate, and a clamping plate. The clamping cylinder is installed on the bracket, the pressure plate is installed on the output end of the clamping cylinder, and the clamping plate is disposed on the pressure plate for squeezing the outer wall of the heat pipe.

[0012] To better realize this utility model, further, there are two clamping plates, distributed at both ends of the pressure plate, the length direction of the pressure plate is parallel to the axial direction of the heat pipe, and the two clamping plates are respectively clamped at different positions on the heat pipe.

[0013] To better realize this utility model, the clamping part further includes a slide rod and a spring. The slide rod is slidably connected to the pressure plate, the clamping plate is installed on the slide rod, and the spring is located between the clamping plate and the pressure plate.

[0014] To better realize this utility model, the clamping part further includes a lifting assembly, which includes a lifting motor, a lead screw, a guide rod, and a lifting seat. The lifting seat is slidably connected to the bracket, the clamping cylinder is mounted on the lifting seat, the lead screw and the guide rod are both mounted on the bracket, the lifting seat is slidably connected to the guide rod, the lead screw is threadedly connected to the lifting seat, and the lifting motor is mounted on the bracket and drivenly connected to the lead screw.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects: (1) This utility model connects the working fluid filling unit and the vacuuming unit through the connecting unit, which avoids the situation of air leakage after vacuuming and before working fluid filling, thus ensuring the reliability of working fluid filling and improving the yield rate; and realizes the effect of rapid working fluid filling of single-port heat pipes. (2) This utility model can complete the clamping operation of variable diameter heat pipe by setting a clamping unit with a sliding rod and a spring; (3) By setting up a clamping unit with lifting components, this utility model can match heat pipes of different lengths to achieve clamping operations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a frontal view of the overall structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the clamping unit structure.

[0019] Figure 4 This is a schematic diagram of the connection unit structure.

[0020] The components are as follows: 20-clamping part; 30-heat pipe; 101-support; 102-collection box; 103-vacuum pump; 104-working fluid storage box; 105-sealed hydraulic cylinder; 106-electric heating pressure block; 107-mounting bracket; 108-sealing cylinder; 109-sealing plate; 110-electromagnetic three-way valve; 111-vacuum tube; 112-working fluid transfer tube; 113-heat pipe connection tube; 114-reducing joint; 115-first solenoid valve; 116-pressure gauge; 117-flow meter; 118-second solenoid valve; 201-clamping cylinder; 202-lifting motor; 203-pressure plate; 204-slide rod; 205-clamping plate; 206-spring; 207-lead screw; 208-smooth rod; 209-lifting seat. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1:

[0023] This embodiment provides a heat pipe working fluid filling device, specifically as follows: Figures 1-2 As shown, this includes items mounted on bracket 101: The clamping unit is used to stably clamp the heat pipe 30; A vacuum pumping unit is used to evacuate the inside of the heat pipe 30 after it is fixed by the clamping unit; the vacuum pumping unit includes a vacuum pump 103. The working fluid filling unit is used to fill the heat pipe 30 after it has been evacuated with working fluid; the working fluid filling unit includes a working fluid storage box 104. The thermo-sealing unit is used to thermo-seal the open end of the heat pipe 30; A connection unit is used to connect the working fluid filling unit or the vacuuming unit to the heat pipe 30; The connection unit includes an electromagnetic three-way valve 110, a vacuum tube 111, a working fluid transfer tube 112, and a heat pipe connection tube 113. The vacuum tube 111, the working fluid transfer tube 112, and the heat pipe connection tube 113 are respectively connected to the three ports of the electromagnetic three-way valve 110. The vacuum tube 111 is connected to the vacuum unit, the working fluid transfer tube 112 is connected to the working fluid filling unit, and the heat pipe connection tube 113 is used to connect to the heat pipe 30. A sealing gasket is provided at the end of the heat pipe connection tube 113 to prevent air leakage during vacuuming.

[0024] When filling the working fluid, the heat pipe 30 is first clamped by the clamping unit to prevent it from moving. At this time, the heat pipe 30 and the heat pipe connecting pipe 113 are aligned and connected. Then, the vacuum tube 111 is connected to the heat pipe connecting pipe 113 through the electromagnetic three-way valve 110 (the heat pipe connecting pipe 113 is not connected to the working fluid transfer tube 112). After the vacuum pump 103 is started, it will begin to evacuate the inside of the heat pipe 30. Then, the working fluid transfer tube 112 is connected to the heat pipe connecting pipe 113 through the electromagnetic three-way valve 110 (the vacuum tube 111 is not connected to the heat pipe connecting pipe 113). At this time, the working fluid in the working fluid storage box 104 will flow into the heat pipe 30 through the working fluid transfer tube 112. After filling, the open end of the heat pipe 30 is sealed by the hot-press sealing unit, thus completing the working fluid filling operation of one heat pipe 30.

[0025] By connecting the connection unit with the working fluid filling unit and the vacuuming unit, leakage is avoided after vacuuming and before working fluid filling, ensuring the reliability of working fluid filling and improving the yield rate; the effect of rapid working fluid filling of single-port heat pipe 30 is achieved. Example 2:

[0026] This embodiment further extends the above embodiment, specifically as follows: Figure 1 , Figure 4 As shown, it also includes an auxiliary sealing unit, which includes a mounting frame 107, a sealing cylinder 108, and a sealing plate 109. The mounting frame 107 is mounted on the bracket 101, and a plurality of sealing cylinders 108 are distributed around the mounting frame 107. The sealing plate 109 is mounted on the output end of the sealing cylinder 108. The sealing plate 109 is used to seal the contact gap between the heat pipe connecting pipe 113 and the heat pipe 30.

[0027] After the heat pipe 30 is connected to the heat pipe connecting pipe 113, the sealing cylinder 108 extends. At this time, the sealing plate 109 presses against the outer wall of the heat pipe 30 and the heat pipe connecting pipe 113. Multiple sealing plates 109 are arranged in a ring to further seal the contact gap between the heat pipe connecting pipe 113 and the heat pipe 30, which greatly improves the sealing effect. In the filling operation of some heat pipes with high vacuum requirements, it plays a role in preventing leakage.

[0028] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again. Example 3:

[0029] This embodiment further extends the above embodiment, specifically as follows: Figure 4 As shown, the vacuum tube 111 is equipped with a first solenoid valve 115 and a pressure gauge 116; the working fluid transmission tube 112 is equipped with a flow meter 117 and a second solenoid valve 118.

[0030] Both the first solenoid valve 115 and the second solenoid valve 118 serve as secondary protection. When the vacuum tube 111 is connected to the heat pipe connection tube 113, the first solenoid valve 115 is open, but the second solenoid valve 118 is closed to prevent leakage at the solenoid three-way valve 110, which could lead to vacuum leakage. Similarly, when the working fluid transfer tube 112 is connected to the heat pipe connection tube 113, the second solenoid valve 118 is open and the first solenoid valve 115 is closed.

[0031] The pressure gauge 116 is used to observe the vacuum status inside the heat pipe 30; the flow meter 117 is used to control the total amount of working fluid filled into the heat pipe 30.

[0032] Furthermore, a reducing connector 114 is detachably connected to the heat pipe connecting pipe 113. In this embodiment, a threaded connection is used. The reducing connector 114 contacts the heat pipe 30, and the sealing plate 109 is used to seal the contact gap between the reducing connector 114 and the heat pipe 30.

[0033] By setting the reducer 114, the heat pipe connecting pipe 113 can be connected to heat pipes 30 of different specifications by changing the specifications of the reducer 114, thus expanding its applicability.

[0034] In another specific embodiment, such as Figure 1 As shown, a collection box 102 is provided on the bracket 101, and the collection box 102 is located directly below the heat pipe 30.

[0035] The collection box 102 is used to collect any possible leaks of the working fluid, preventing problems such as overfilling of the working fluid or diffusion and contamination caused by damage to the heat pipe 30.

[0036] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again. Example 4:

[0037] This embodiment further extends the above embodiment, specifically as follows: Figures 1-2 As shown, the hot-press sealing unit includes two sealing hydraulic cylinders 105 symmetrically mounted on the bracket 101. An electric heating block 106 is installed at the output end of the sealing hydraulic cylinder 105. The electric heating block 106 is used to heat and squeeze the wall of the heat pipe 30.

[0038] After the working fluid is filled, the electric heating block 106 is energized and heated. Once the temperature is sufficient, the sealing hydraulic cylinder 105 extends. At this time, the two electric heating blocks 106 approach each other, squeezing the heat pipe 30 to close, causing the pipe wall to deform and contact, and gradually fuse under high temperature to achieve a seal at the port.

[0039] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again. Example 5:

[0040] This embodiment further extends the above embodiment, specifically as follows: Figures 1-3 As shown, the clamping unit includes two clamping parts 20 symmetrically mounted on the bracket 101. Each clamping part 20 includes a clamping cylinder 201, a pressure plate 203, and a clamping plate 205. The clamping cylinder 201 is mounted on the bracket 101, the pressure plate 203 is mounted on the output end of the clamping cylinder 201, and the clamping plate 205 is disposed on the pressure plate 203 for pressing the outer wall of the heat pipe 30.

[0041] When it is necessary to clamp the heat pipe 30, the clamping cylinder 201 extends, and at this time the pressure plate 203 drives the clamping plate 205 to approach the outer wall of the heat pipe 30 to achieve the clamping operation.

[0042] Furthermore, there are two clamping plates 205, which are distributed at the two ends of the pressure plate 203. The length direction of the pressure plate 203 is parallel to the axial direction of the heat pipe 30, and the two clamping plates 205 are clamped at different positions on the heat pipe 30.

[0043] This configuration changes the clamping of heat pipe 30 from a single point to multiple points, effectively improving the stability of clamping heat pipe 30.

[0044] Furthermore, the clamping part 20 also includes a slide rod 204 and a spring 206. The slide rod 204 is slidably connected to the pressure plate 203, the clamping plate 205 is mounted on the slide rod 204, and the spring 206 is located between the clamping plate 205 and the pressure plate 203.

[0045] Although most heat pipes have a fixed diameter, a small number of heat pipes have varying diameters during production. Therefore, a slide bar 204 is set up in conjunction with a spring 206 so that each clamping point can match the varying diameter, thus successfully completing the clamping operation of the heat pipe 30.

[0046] Furthermore, the clamping part 20 also includes a lifting assembly, which includes a lifting motor 202, a lead screw 207, a guide rod 208, and a lifting seat 209. The lifting seat 209 is slidably connected to the bracket 101. The clamping cylinder 201 is mounted on the lifting seat 209. The lead screw 207 and the guide rod 208 are both mounted on the bracket 101. The lifting seat 209 is slidably connected to the guide rod 208. The lead screw 207 is threadedly connected to the lifting seat 209. The lifting motor 202 is mounted on the bracket 101 and is drivenly connected to the lead screw 207.

[0047] Since heat pipes vary in length, the height of the heat pipe 30 above the ground varies according to its length in order to ensure a smooth connection between the open port of the heat pipe and the connection unit. In order to ensure that the clamping part 20 can stably clamp the heat pipe 30, a lifting component is used to change the height of the clamping cylinder 201 to match heat pipes 30 of different lengths and achieve clamping operation.

[0048] Specifically, when the lifting motor 202 is started, the lifting motor 202 drives the lead screw 207 to rotate. At this time, the lifting seat 209 will move longitudinally along the bracket 101 under the guidance of the guide rod 208, so that the clamping plate 205 can smoothly clamp the heat pipe 30. The longer heat pipe 30 will lower the lifting seat 209, and the shorter heat pipe 30 will raise the lifting seat 209.

[0049] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0050] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A heat pipe working fluid filling device, characterized in that, Including those mounted on the bracket (101): A clamping unit is used to stably clamp the heat pipe (30); A vacuum unit is used to evacuate the inside of the heat pipe (30) after it is fixed by the clamping unit; The working fluid filling unit is used to fill the heat pipe (30) after it has been evacuated with working fluid; A hot-press sealing unit is used to hot-press seal the open end of the heat pipe (30); A connecting unit is used to connect the working fluid filling unit or the vacuum unit to the heat pipe (30); The connection unit includes an electromagnetic three-way valve (110), a vacuum tube (111), a working fluid transfer tube (112), and a heat pipe connection tube (113). The vacuum tube (111), the working fluid transfer tube (112), and the heat pipe connection tube (113) are respectively connected to the three ports of the electromagnetic three-way valve (110). The vacuum tube (111) is connected to the vacuum unit, the working fluid transfer tube (112) is connected to the working fluid filling unit, and the heat pipe connection tube (113) is used to connect to the heat pipe (30).

2. The heat pipe working fluid filling device according to claim 1, characterized in that: It also includes an auxiliary sealing unit, which includes a mounting bracket (107), a sealing cylinder (108), and a sealing plate (109). The mounting bracket (107) is mounted on the bracket (101), and a plurality of the sealing cylinders (108) are distributed around the mounting bracket (107). The sealing plate (109) is mounted on the output end of the sealing cylinder (108). The sealing plate (109) is used to seal the contact gap between the heat pipe connecting pipe (113) and the heat pipe (30).

3. The heat pipe working fluid filling device according to claim 2, characterized in that: The vacuum tube (111) is equipped with a first solenoid valve (115) and a pressure gauge (116); the working fluid transmission tube (112) is equipped with a flow meter (117) and a second solenoid valve (118).

4. A heat pipe working fluid filling device according to claim 2, characterized in that: A reducing connector (114) is detachably connected to the heat pipe connecting pipe (113). The reducing connector (114) contacts the heat pipe (30). The sealing plate (109) is used to seal the contact gap between the reducing connector (114) and the heat pipe (30).

5. A heat pipe working fluid filling device according to claim 1, characterized in that: A collection box (102) is provided on the bracket (101), and the collection box (102) is located directly below the heat pipe (30).

6. A heat pipe working fluid filling device according to claim 1, characterized in that: The hot-press sealing unit includes two sealing hydraulic cylinders (105) symmetrically mounted on the bracket (101). The output end of the sealing hydraulic cylinder (105) is equipped with an electric heating block (106), which is used to heat and squeeze the wall of the heat pipe (30).

7. A heat pipe working fluid filling device according to any one of claims 1-6, characterized in that: The clamping unit includes two clamping parts (20) symmetrically installed on the bracket (101). Each clamping part (20) includes a clamping cylinder (201), a pressure plate (203), and a clamping plate (205). The clamping cylinder (201) is installed on the bracket (101), the pressure plate (203) is installed at the output end of the clamping cylinder (201), and the clamping plate (205) is disposed on the pressure plate (203) for squeezing the outer wall of the heat pipe (30).

8. A heat pipe working fluid filling device according to claim 7, characterized in that: There are two clamping plates (205), which are distributed at the two ends of the pressure plate (203). The length direction of the pressure plate (203) is parallel to the axial direction of the heat pipe (30), and the two clamping plates (205) are clamped at different positions on the heat pipe (30).

9. A heat pipe working fluid filling device according to claim 8, characterized in that: The clamping part (20) also includes a slide rod (204) and a spring (206). The slide rod (204) is slidably connected to the pressure plate (203). The clamping plate (205) is installed on the slide rod (204). The spring (206) is located between the clamping plate (205) and the pressure plate (203).

10. A heat pipe working fluid filling device according to claim 9, characterized in that: The clamping part (20) further includes a lifting assembly, which includes a lifting motor (202), a lead screw (207), a guide rod (208), and a lifting seat (209). The lifting seat (209) is slidably connected to the bracket (101). The clamping cylinder (201) is installed on the lifting seat (209). The lead screw (207) and the guide rod (208) are both installed on the bracket (101). The lifting seat (209) is slidably connected to the guide rod (208). The lead screw (207) is threadedly connected to the lifting seat (209). The lifting motor (202) is installed on the bracket (101) and is drivenly connected to the lead screw (207).

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