Non-gravity micro-channel heat pipe and micro-channel heat pipe heat exchange device

Abstract

The utility model belongs to the technical field of heat pipes, and particularly relates to a non-gravity micro-channel heat pipe and a micro-channel heat pipe heat exchange device. The non-gravity micro-channel heat pipe comprises a flat pipe, the flat pipe is provided with a first sealing end and a second sealing end, a plurality of micro-channel holes and a plurality of middle ribs are arranged in the flat pipe, and the adjacent micro-channel holes are separated by the middle ribs; the flat pipe is provided with a first side wall and a second side wall, and the at least one first middle rib and the at least one second middle rib are alternately arranged in the direction from the first side wall to the second side wall. The first end of the first middle rib is connected to the first sealing end in a sealed mode, and a first gap between the second end of the first middle rib and the inner surface of the second sealing end forms a first through opening. The second end of the second middle rib is connected to the second sealing end in a sealed mode, and the first end of the second middle rib and a second interval on the inner surface of the first sealing end form a second through opening. The multiple micro-channel holes are sequentially communicated end to end through the first through opening and the second through opening, and then a roundabout flow channel is formed.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat pipes, and particularly relates to a non-gravity microchannel heat pipe and a microchannel heat pipe heat exchange device. Background Art

[0002] There are two main types of conventional non-gravity heat pipes. One is a capillary pulsating heat pipe, which is made by bending a slender metal round tube, then connecting the ends and refrigerant filling ports. The refrigerant circulates inside the slender metal round tube, absorbing heat at the evaporation end and releasing heat at the condensation end. However, this slender metal round tube needs to be shaped, resulting in high cost, complex structure, and limited application occasions.

[0003] The other is a plate-type pulsating heat pipe, which is grooved on a flat plate and then welded with a layer of flat plate. This structure has high grooving costs and is prone to capillary blockage during welding, resulting in a low yield and limited application occasions.

[0004] Therefore, the costs of the two conventional non-gravity heat pipes are relatively high. To solve this problem, some existing non-gravity heat pipes use microchannel flat tubes. The microchannel flat tubes have multiple microchannel holes. Both ends of the microchannel holes are closed. Multiple through holes are arranged on the side walls of the microchannel flat tubes. Multiple external connectors are welded on the side walls of the microchannel flat tubes. A accommodating space is formed between the microchannel flat tubes and the external connectors. Each accommodating space is connected to at least two microchannel holes through corresponding through holes, so that the refrigerant between the multiple microchannel holes can circulate with each other in the accommodating space, thereby realizing the non-gravity reflux of the refrigerant.

[0005] However, the above-mentioned non-gravity heat pipe needs to weld a plurality of external connectors on the side wall of the microchannel flat tube, which results in a larger volume of the non-gravity heat pipe and occupies a larger space. Utility Model Content

[0006] The technical problem to be solved by the utility model is: for the existing non-gravity heat pipe, a plurality of external connectors need to be welded on the side wall of the microchannel flat tube, resulting in the problem that the non-gravity heat pipe occupies a large space, and a non-gravity microchannel heat pipe and a microchannel heat pipe heat exchange device are provided.

[0007] In order to solve the above technical problems, on the one hand, the embodiment of the utility model provides a non-gravity microchannel heat pipe, including a flat tube, wherein the two ends of the flat tube in the length direction have a first sealed end and a second sealed end, and the flat tube has a plurality of microchannel holes and a plurality of center ribs, wherein the plurality of microchannel holes are spaced apart along the width direction of the flat tube, and adjacent microchannel holes are separated by the center ribs; the flat tube has a first side wall and a second side wall oppositely arranged in the width direction, and the center ribs include at least one first center rib and at least one second center rib, and at least one first center rib and at least one second center rib are alternately arranged from the first side wall to the second side wall;

[0008] The lengths of the first center rib and the second center rib are smaller than the length of the microchannel hole; the first end of the first center rib is sealed and connected to the first sealed end, and the second end of the first center rib and the first interval of the inner surface of the second sealed end form a first opening; the second end of the second center rib is sealed and connected to the second sealed end, and the first end of the second center rib and the second interval of the inner surface of the first sealed end form a second opening; the plurality of microchannel holes are connected end to end in sequence through the first opening and the second opening to form a circuitous flow channel, and the flat tube is provided with a liquid inlet hole and a liquid return hole.

[0009] Optionally, one end of the flat tube is welded to form the first sealed end, and the other end is welded to form the second sealed end.

[0010] Optionally, it further comprises a first sealing block and a second sealing block, wherein the first sealing block is plugged at the first end port of the flat tube to form a first sealing end, and the second sealing block is plugged at the second end port of the flat tube to form a second sealing end.

[0011] Optionally, a liquid inlet hole and a liquid return hole are arranged on at least one of the first sealed end and the second sealed end, the liquid inlet hole is connected to the microchannel hole adjacent to the first side wall, and the liquid return hole is connected to the microchannel hole adjacent to the second side wall.

[0012] Optionally, at least one adapter block is further included, the adapter block is fixed on the flat tube, a connecting structure is provided on the adapter block, and the liquid inlet hole and the liquid return hole are connected through the connecting structure.

[0013] Optionally, the number of microchannel holes is an even number, the liquid inlet hole and the liquid return hole are arranged at the same end of the flat tube, and one adapter block is provided, and the adapter block is sleeved on the end of the flat tube.

[0014] Optionally, the connecting structure comprises an open groove with one side open, the adapter block is sleeved on the end of the flat tube through the open groove, and the flat tube and the open groove form a connecting cavity connecting the liquid inlet hole and the liquid return hole.

[0015] Optionally, it also includes a circulation pump and two filling pipes, and the connecting structure includes two sockets arranged on the adapter block, one of which is connected to the liquid inlet hole, and the other is connected to the liquid return hole; the two filling pipes correspond to the two sockets one by one, one end of the filling pipe is inserted into the corresponding socket, and the other ends of the two filling pipes are connected through the circulation pump.

[0016] Optionally, it also includes a circulation pump and two filling pipes, the side walls of the filling pipes are provided with a cutout, the filling pipes are clamped on one side of the width direction of the flat tube through the cutout and are sealed with the flat tube, one of the filling pipes is connected to the liquid inlet hole, the other filling pipe is connected to the liquid return hole, and the two filling pipes are connected through the circulation pump.

[0017] In the non-gravity type microchannel heat pipe of the utility model, the first central rib and the second central rib alternately arranged from the first side wall to the second side wall in the flat tube separate the microchannel holes in the flat tube, and the multiple microchannel holes are connected in sequence end to end through the first opening formed by the first interval between the second end of the first central rib and the second sealed end and the second opening formed by the second interval between the first end of the second central rib and the first sealed end to form a circuitous flow channel, so that the adjacent microchannel holes in the flat tube have the ability to reflux, thereby realizing the function of internal circulation of the non-gravity type microchannel heat pipe. Compared with the prior art of welding multiple external connectors on the side wall of the flat tube, the non-gravity type microchannel heat pipe of the utility model realizes reflux through the first opening and the second opening formed at the end of the flat tube, and there is no need to weld multiple external connectors on the side wall of the flat tube, so that the non-gravity type microchannel heat pipe has a smaller volume, occupies less space, and is convenient for layout.

[0018] On the other hand, an embodiment of the present invention provides a microchannel heat pipe heat exchange device, comprising at least one non-gravity microchannel heat pipe as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a first structure of a non-gravity microchannel heat pipe provided by an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 Transverse cross-section of

[0021] Figure 3 yes Figure 1 Longitudinal section of

[0022] Figure 4 yes Figure 1 An enlarged view of the first sealing end;

[0023] Figure 5 It is a schematic diagram of a second structure of a non-gravity microchannel heat pipe provided by an embodiment of the utility model;

[0024] Figure 6 yes Figure 5 Schematic diagram of the structure of the medium flat tube;

[0025] Figure 7 It is a schematic diagram of a third structure of a non-gravity microchannel heat pipe provided by an embodiment of the utility model;

[0026] Figure 8 yes Figure 7 Transverse cross-section of

[0027] Fig. 9 It is a schematic diagram of a fourth structure of a non-gravity microchannel heat pipe provided by an embodiment of the utility model;

[0028] Fig.10 It is a schematic diagram of a fifth structure of a non-gravity microchannel heat pipe provided by an embodiment of the utility model;

[0029] Fig.11 This is a schematic diagram of the structure of a non-gravity microchannel heat pipe provided by an embodiment of the utility model, in which a flat tube is bent into a serpentine shape;

[0030] Fig.12 It is a structural schematic diagram of a microchannel heat pipe heat exchange device provided in one embodiment of the utility model.

[0031] The reference numerals in the specification are as follows:

[0032] 1. Flat tube; 11. First sealing end; 12. Second sealing end; 13. Liquid inlet hole; 14. Liquid return hole; 15. First center rib; 16. Second center rib; 17. Microchannel hole; 18. First through port; 19. Second through port; 2. Adapter block; 21. Connecting cavity; 3. Filling tube; 4. First sealing block; 5. Second sealing block. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] An embodiment of the utility model provides a non-gravity microchannel heat pipe, such as Figure 1 and Figure 2 As shown, the first structure of the non-gravity microchannel heat pipe is shown. The non-gravity microchannel heat pipe comprises a flat tube 1. The two ends of the flat tube 1 in the length direction have a first sealed end 11 and a second sealed end 12. The flat tube 1 has a plurality of microchannel holes 17 and a plurality of center ribs. The plurality of microchannel holes 17 are spaced apart along the width direction of the flat tube 1, and adjacent microchannel holes 17 are separated by the center ribs.

[0035] The flat tube 1 has a first side wall and a second side wall oppositely arranged in the width direction. The center ribs include at least one first center rib 15 and at least one second center rib 16. The at least one first center rib 15 and the at least one second center rib 16 are alternately arranged from the first side wall to the second side wall.

[0036] The lengths of the first central rib 15 and the second central rib 16 are smaller than the lengths of the microchannel holes 17. The first end of the first central rib 15 in the longitudinal direction is sealed and connected to the first sealed end 11, and the first interval between the second end of the first central rib 15 in the longitudinal direction and the inner surface of the second sealed end 12 forms a first opening 18. The second end of the second central rib 16 in the longitudinal direction is sealed and connected to the second sealed end 12, and the second interval between the first end of the second central rib 16 in the longitudinal direction and the inner surface of the first sealed end 11 forms a second opening 19. The plurality of microchannel holes 17 are connected head to tail in sequence through the first opening 18 and the second opening 19, thereby forming a detour flow channel. The flat tube 1 is provided with a liquid inlet hole 13 connected to the head end of the detour flow channel and a liquid return hole 14 connected to the tail end of the detour flow channel.

[0037] One end of the non-gravity microchannel heat pipe is the condensation end, and the other end is the evaporation end. The temperature difference between the condensation end and the evaporation end causes the refrigerant to circulate in the non-gravity microchannel heat pipe. The process of the refrigerant circulating in the non-gravity microchannel heat pipe is as follows: Figure 2 As shown, the first microchannel hole 17 on the left is numbered M, and the numbers to the right are M+1, M+2, and finally M+N (the last microchannel hole 17). The refrigerant flows from the liquid inlet hole 13 into the M hole at the first end, flows to the second end, flows to the M+1 hole through the first opening 18, then flows to the first end, flows to the M+2 hole at the first end through the second opening 19, and flows to the M+3 hole in the same way... until it flows to M+N, and finally, flows out from the return liquid port.

[0038] The first opening 18 and the second opening 19 are provided to connect the ends of the multiple microchannel holes 17 in sequence, so that the flat tube 1 has the ability of refrigerant to reflux between adjacent microchannel holes 17, thereby realizing the internal circulation function of the non-gravity microchannel heat pipe. The first opening 18 is formed by milling the second end of the first center rib 15, and the second opening 19 is formed by milling the first end of the second center rib 16. There is no need to weld multiple external connectors for refluxing adjacent microchannel holes 17 on the side wall of the flat tube 1 as in the prior art, and the processing cost is low. Moreover, the flow cross-sections of the first opening 18 and the second opening 19 are small, which has little impact on the flow of the refrigerant, and thus has little impact on the overall heat exchange performance.

[0039] Specifically, the second end face of the first central rib 15 is milled so that the second end face of the first central rib 15 forms a relatively deep end face, and the second end face of the second central rib 16 forms a relatively shallow end face, so that when the second end face of the second central rib 16 is sealed and connected to the second sealing end 12 of the flat tube 1, a first gap can be formed between the second end face of the first central rib 15 and the inner end face of the second sealing end 12. The first end face of the second central rib 16 is milled so that the first end face of the second central rib 16 forms a relatively deep end face, and the first end face of the first central rib 15 forms a relatively shallow end face, so that when the first end face of the first central rib 15 is sealed and connected to the first sealing end 11 of the flat tube 1, a second gap can be formed between the first end face of the second central rib 16 and the inner end face of the first sealing end 11.

[0040] In the non-gravity type microchannel heat pipe of the utility model, the first central rib 15 and the second central rib 16 alternately arranged from the first side wall to the second side wall in the flat tube 1 separate the microchannel holes 17 in the flat tube 1, and the multiple microchannel holes 17 are connected in sequence end to end through the first opening 18 formed by the first interval between the second end of the first central rib 15 and the second sealed end 12 and the second opening 19 formed by the second interval between the first end of the second central rib 16 and the first sealed end 11, so as to form a circuitous flow channel, so that the adjacent microchannel holes 17 in the flat tube 1 have the ability to reflux, thereby realizing the function of internal circulation of the non-gravity type microchannel heat pipe. Compared with the prior art of welding multiple external connectors on the side wall of the flat tube 1, the non-gravity type microchannel heat pipe of the utility model realizes reflux through the first opening 18 and the second opening 19 formed at the end of the flat tube 1, and there is no need to weld multiple external connectors on the side wall of the flat tube 1, so that the non-gravity type microchannel heat pipe has a small volume, occupies a small space, and is easy to layout.

[0041] In one embodiment, one end of the flat tube 1 is welded to form a first sealed end 11, and the other end is welded to form a second sealed end 12. By welding the first sealed end 11 and the second sealed end 12, no external sealing member is required at the ends, further reducing the volume.

[0042] When welding is used for sealing, there is a problem that too much solder can easily clog the microchannel hole 17, and too little solder can easily cause welding leakage. In addition, the more welding points there are, the greater the probability of welding leakage or welding blockage. Compared with the prior art in which multiple external connectors are welded on the side wall of the flat tube 1 and multiple welding points are provided on the side wall of the flat tube 1, the non-gravity microchannel heat pipe of the utility model shares the welding points at both ends, and the number of welding points is relatively small, which reduces the probability of welding blockage or welding leakage and improves the success rate of welding.

[0043] Preferably, ultrasonic welding is adopted.

[0044] In one embodiment, the liquid inlet hole 13 and the liquid return hole 14 are arranged on at least one of the first sealed end 11 and the second sealed end 12, the liquid inlet hole 13 is connected to the microchannel hole 17 adjacent to the first side wall, that is, the first microchannel hole 17, and the liquid return hole 14 is connected to the microchannel hole 17 adjacent to the second side wall, that is, the last microchannel hole 17.

[0045] Specifically, Figure 4 As shown, notches are first milled on both sides of the width direction of the end of the flat tube 1, and then the middle area of ​​the flat tube 1 is welded. The setting of the notch makes the opening of the first microchannel hole 17 of the sealed end formed by welding form the liquid inlet hole 13, and the opening of the last microchannel hole 17 forms the liquid return hole 14.

[0046] In one embodiment, as shown in 2, at least one adapter block 2 is further included, the adapter block 2 is fixed on the flat tube 1, a connecting structure is provided in the adapter block 2, the liquid inlet hole 13 and the liquid return hole 14 are connected through the connecting structure, so that the refrigerant flowing out of the liquid return hole 14 can flow back to the liquid inlet hole 13.

[0047] In one embodiment, the number of microchannel holes 17 is even, the liquid inlet hole 13 and the liquid return hole 14 are arranged at the same end of the flat tube 1 , one adapter block 2 is provided, and the adapter block 2 is sleeved on the end of the flat tube 1 .

[0048] In one embodiment, as 2 and Figure 3 As shown, the connecting structure includes an open groove with one side open, and the adapter block 2 is sleeved on the end of the flat tube 1 through the open groove. The flat tube 1 and the open groove form a connecting cavity 21 connecting the liquid inlet hole 13 and the liquid return hole 14.

[0049] At this time, the working mode of the non-gravity microchannel heat pipe is that the temperature difference refrigerant circulates in the circuitous flow channel through the condensation end and the evaporation end of the non-gravity microchannel heat pipe, and realizes the flow of the refrigerant from the last microchannel hole 17 to the first microchannel hole 17 through the connecting cavity 21.

[0050] A filling port communicating with the communicating cavity 21 may be provided on the adapter block 2, and a filling pipe 3 may be inserted into the filling port, and a vacuum is drawn through the filling pipe 3 to fill the circuitous flow channel with refrigerant.

[0051] In other embodiments, Figure 5As shown, the connecting cavity 21 can be eliminated, and the non-gravity microchannel heat pipe also includes a circulation pump and two filling pipes 3. The connecting structure includes two sockets arranged on the adapter block 2, one of which is correspondingly connected to the liquid inlet hole 13, and the other is correspondingly connected to the liquid return hole 14. The two filling pipes 3 correspond to the two sockets one by one, one end of the filling pipe 3 is inserted into the corresponding socket, and the other ends of the two filling pipes 3 are connected through the circulation pump, which can drive the refrigerant to realize rapid circulation from the first microchannel hole 17 to the last microchannel hole 17.

[0052] The filling pipe 3 has the function of connecting the first microchannel hole 17 and the last microchannel hole 17, and also has the function of evacuating and filling the refrigerant through the filling pipe 3. After filling the refrigerant, the filling pipe 3 is sealed. When the non-gravity microchannel heat pipe is working, the circulation pump drives the refrigerant flowing out of the return hole 14 from one filling pipe 3 to another filling pipe 3 and flows into the liquid inlet hole 13.

[0053] It should be noted that the filling tube 3 is fixed to the adapter block 2 by welding, preferably by ultrasonic welding.

[0054] like Figure 5 As shown, the utility model also provides a second structure of a non-gravity microchannel flat tube 1. Different from the first structure, the second structure uses a first sealing block 4 and a second sealing block 5 to seal the two ends of the flat tube 1 to form a first sealed end 11 and a second sealed end 12. The first sealing block 4 is filled at the first end of the flat tube 1 to form the first sealed end 11, and the second sealing block 5 is filled at the second end of the flat tube 1 to form the second sealed end 12. Preferably, the first sealing block 4 and the second sealing block 5 are sealed and connected to the flat tube 1 by ultrasonic welding.

[0055] In one embodiment, if Figure 5 and Figure 6 As shown, the first end faces of all the first central ribs 15 are aligned and have a third interval with the first end face of the flat tube 1 to form a first sealed cavity. The first sealing block 4 is filled in the first sealed cavity and is sealedly connected to the flat tube 1 to form a first sealed end 11.

[0056] The second end surfaces of all the second center ribs 16 are aligned and have a fourth interval with the second end surface of the flat tube 1 to form a second sealed cavity. The second sealing block 5 is filled in the second sealed cavity and is sealed to the flat tube 1 to form a second sealed end 12.

[0057] It should be noted that the third interval is formed between the first end face of the first center rib 15 and the first end face of the flat tube 1 by milling the first end face of the first center rib 15, and the fourth interval is formed between the second end face of the second center rib 16 and the second end face of the flat tube 1 by milling the second end face of the second center rib 16.

[0058] In addition, when the liquid inlet hole 13 is arranged on the first sealed end 11, the width of the first sealed end 11 can be smaller than the width of the flat tube 1, so that a first middle rib 15 flush with the first end surface of the flat tube 1 can be retained between the first sealing block 4 and the first side wall, and the first sealing block 4 is sealedly connected to the first middle rib 15, so that the opening of the first microchannel hole 17 forms the liquid inlet hole 13. When the liquid return hole 14 is arranged on the first sealed end 11 or the first sealed end 11, the liquid return hole 14 can also be formed in the same way.

[0059] In other embodiments, Figure 8 As shown, a plurality of first slots distributed at intervals can be set on the inner end surface of the first sealing block 4, and the plurality of first slots correspond to the plurality of first center ribs 15 one by one. The first ends of the first center ribs 15 are inserted into the corresponding first slots. The first sealing block 4 is sealed and connected to the first side wall on one side in the width direction of the flat tube 1, and is sealed and connected to the second side wall on the other side.

[0060] A plurality of second slots distributed at intervals can be set on the inner end surface of the second sealing block 5, and the plurality of second slots correspond one-to-one to the plurality of second center ribs 16. The second ends of the second center ribs 16 are inserted into the corresponding second slots. The second sealing block 5 is sealed and connected to the first side surface on one side in the width direction of the flat tube 1, and is sealed and connected to the second side wall on the other side.

[0061] like Figure 7 and Figure 8 As shown, the utility model also provides a third structure of the non-gravity microchannel flat tube 1, the number of microchannel holes 17 is an even number, the liquid inlet hole 13 and the liquid return hole 14 are located at the same end of the flat tube 1, and the difference from the first structure is that the liquid inlet hole 13 is arranged on the first side wall, and the liquid return hole 14 is arranged on the second side wall. At this time, there is only one adapter block 2, and two filling pipes 3 are arranged. The adapter block 2 is sleeved outside the flat tube 1, and the adapter block 2 is provided with external flow channels on both opposite sides, one end of one of the external flow channels is connected to the liquid inlet hole 13, and one end of the other external flow channel is connected to the liquid return hole 14, and the two filling pipes 3 are respectively inserted into the other ends of the two external flow channels, and the two filling pipes 3 are connected through a circulation pump.

[0062] like Fig. 9 As shown, the utility model also provides a fourth structure of the non-gravity microchannel flat tube 1, which is different from the first structure in that a circulation pump and two filling tubes 3 are provided, and a notch is provided on the side wall of the filling tube 3. The filling tube 3 is clamped on one side of the width direction of the flat tube 1 through the notch and is sealed and connected to the flat tube 1. One of the filling tubes 3 is connected to the liquid inlet hole 13, and the other filling tube 3 is connected to the liquid return hole 14. The two filling tubes 3 are connected through the circulation pump. The circulation pump drives the refrigerant to realize a rapid circulation from the first microchannel hole 17 to the last microchannel hole 17.

[0063] like Fig.10 As shown, the utility model also provides a fifth structure of the non-gravity microchannel flat tube 1. Different from the first structure, the number of microchannel holes 17 is odd, two filling tubes 3 are provided, and two adapter blocks 2 are provided. At this time, the liquid inlet hole 13 is provided on the end face of the first sealing end 11 and is connected to the first microchannel hole 17 of the flat tube 1, and the liquid return hole 14 is provided on the end face of the second sealing end 12 and is connected to the last first microchannel hole 17.

[0064] The connecting structure of each adapter block 2 includes a socket, one end of the filling tube 3 is inserted into the socket and rests against the end surface of the flat tube 1, one of the filling tubes 3 is connected to the liquid inlet hole 13, and the other filling tube 3 is connected to the liquid return hole 14. The filling tubes 3 are preferably sealed and fixed on the welding block by ultrasonic welding.

[0065] In addition, an embodiment of the present invention provides a microchannel heat pipe heat exchange device, including at least one non-gravity microchannel heat pipe.

[0066] In one embodiment, if Fig.11 and Fig.12 As shown, the long flat tube 1 is bent into a serpentine shape, and a heat sink, such as a fin or a heat sink, is installed according to requirements.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A non-gravity microchannel heat pipe, It is characterized in that The flat tube (1) comprises a first sealed end (11) and a second sealed end (12) at both ends in the length direction of the flat tube (1); the flat tube (1) comprises a plurality of microchannel holes (17) and a plurality of center ribs; the plurality of microchannel holes (17) are spaced apart along the width direction of the flat tube (1); adjacent microchannel holes (17) are separated by the center ribs; the flat tube (1) comprises a first side wall and a second side wall arranged opposite to each other in the width direction; the center ribs comprise at least one first center rib (15) and at least one second center rib (16); at least one first center rib (15) and at least one second center rib (16) are arranged alternately from the first side wall to the second side wall; The lengths of the first central rib (15) and the second central rib (16) are shorter than the length of the microchannel hole (17); the first end of the first central rib (15) is sealedly connected to the first sealed end (11); the second end of the first central rib (15) and the first interval between the inner surface of the second sealed end (12) form a first opening (18); the second end of the second central rib (16) is sealedly connected to the second sealed end (12); the first end of the second central rib (16) and the second interval between the inner surface of the first sealed end (11) form a second opening (19); the plurality of microchannel holes (17) are connected end to end in sequence through the first opening (18) and the second opening (19), thereby forming a circuitous flow channel; the flat tube (1) is provided with a liquid inlet hole (13) and a liquid return hole (14).

2. The non-gravity microchannel heat pipe according to claim 1, It is characterized in that One end of the flat tube (1) is welded to form the first sealed end (11), and the other end is welded to form the second sealed end (12).

3. The non-gravity microchannel heat pipe according to claim 1, It is characterized in that It also comprises a first sealing block (4) and a second sealing block (5), wherein the first sealing block (4) is plugged at the first end port of the flat tube (1) to form a first sealing end (11), and the second sealing block (5) is plugged at the second end port of the flat tube (1) to form a second sealing end (12).

4. The non-gravity microchannel heat pipe according to any one of claims 1 to 3, It is characterized in that The liquid inlet hole (13) and the liquid return hole (14) are arranged on at least one of the first sealed end (11) and the second sealed end (12); the liquid inlet hole (13) is connected to the microchannel hole (17) adjacent to the first side wall, and the liquid return hole (14) is connected to the microchannel hole (17) adjacent to the second side wall.

5. The non-gravity microchannel heat pipe according to claim 4, It is characterized in that It also comprises at least one adapter block (2), the adapter block (2) being fixed on the flat tube (1), the adapter block (2) being provided with a connecting structure, and the liquid inlet hole (13) and the liquid return hole (14) being connected via the connecting structure.

6. The non-gravity microchannel heat pipe according to claim 5, It is characterized in that The number of the microchannel holes (17) is an even number, the liquid inlet hole (13) and the liquid return hole (14) are arranged at the same end of the flat tube (1), and one adapter block (2) is provided, and the adapter block (2) is sleeved on the end of the flat tube (1).

7. The non-gravity microchannel heat pipe according to claim 6, It is characterized in that The connecting structure comprises an open groove with an opening on one side, the adapter block (2) is sleeved on the end of the flat tube (1) through the open groove, and the flat tube (1) and the open groove form a connecting cavity (21) connecting the liquid inlet hole (13) and the liquid return hole (14).

8. The non-gravity microchannel heat pipe according to claim 6, It is characterized in that It also comprises a circulation pump and two filling pipes (3), wherein the communication structure comprises two plug holes arranged on the adapter block (2), wherein one of the plug holes is correspondingly connected to the liquid inlet hole (13), and the other of the plug holes is correspondingly connected to the liquid return hole (14); the two filling pipes (3) correspond to the two plug holes one by one, one end of the filling pipe (3) is inserted into the corresponding plug hole, and the other ends of the two filling pipes (3) are connected through the circulation pump.

9. The non-gravity microchannel heat pipe according to claim 4, It is characterized in that It also comprises a circulation pump and two filling pipes (3), the side walls of the filling pipes (3) being provided with cutouts, the filling pipes (3) being clamped on one side of the width direction of the flat tube (1) through the cutouts and being sealedly connected to the flat tube (1), one of the filling pipes (3) being connected to the liquid inlet hole (13), the other of the filling pipes (3) being connected to the liquid return hole (14), and the two filling pipes (3) being connected via the circulation pump.

10. A microchannel heat pipe heat exchange device, It is characterized in that The method comprises at least one non-gravity microchannel heat pipe according to any one of claims 1 to 9.

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