A microchannel heat exchanger

Abstract

The present invention discloses a microchannel heat exchanger, specifically related to the field of heat exchangers, including a main box. A radiator is fixedly installed on the outer surface of one side of the main body housing and the main body housing. A manifold is fixedly installed at the top end of the main body housing. A fin frame and a diversion tube are fixedly installed inside the main body housing, and the fin frame and the diversion tube are longitudinally arranged in an alternating manner inside the main body housing in sequence. A slot is opened at the bottom end of the manifold. In the present invention, a piston plate is arranged in the manifold to separate the diversion tubes, which are respectively used for air intake and exhaust. Moreover, the position of the piston arranged in the manifold can be adjusted as required. When the pressure on the air intake side is relatively large, the generated pressure difference will move the piston plate towards the air outlet side, increasing the number of diversion tubes for air intake. It can be adaptively adjusted according to different situations, greatly increasing the applicability of the device. And the position of the piston plate can be manually adjusted as required, which is relatively practical.

Description

Technical Field

[0001] The present invention relates to the field of heat exchangers, and more specifically, to a microchannel heat exchanger. Background Art

[0002] A microchannel, also known as a microchannel heat exchanger, is a heat exchanger with an equivalent diameter of the channel in the range of 10 - 1000 μm. There are dozens of fine channels in the flat tube of this heat exchanger, and the two ends of the flat tube are connected to circular headers. A partition is provided in the header to divide the flow channels of the heat exchanger into several processes.

[0003] During the heat exchange process of the existing microchannel heat exchanger, the fluid is separated by a diversion tube for heat exchange operation. However, the number of diversion tubes is fixed and cannot be adjusted. When the body works at a high level, it is impossible to increase the heat exchange efficiency according to the corresponding situation, and there are certain limitations in use. Secondly, during the heat exchange process, heat exchange mainly occurs through the internal fins. After the fins are used for a long time, dust is likely to accumulate on the surface, and regular cleaning is required. However, most of the fins and the heat exchanger are non-detachable, making it inconvenient to clean. Finally, during the diversion process of the diversion tube, its interior cannot be observed, and the number of diversion tubes is large. When one or more of them are blocked, it is impossible to detect it in time, thus affecting the diversion effect. Summary of the Invention

[0004] To overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a microchannel heat exchanger. A piston plate is provided in the header to separate the diversion tubes, which are respectively used for air intake and exhaust. Moreover, the position of the piston provided in the header can be adjusted as needed. When the pressure on the air intake side is relatively large, the generated pressure difference will move the piston plate towards the air outlet side, increasing the number of diversion tubes for air intake. It can be adaptively adjusted according to different situations, greatly increasing the applicability of the device. And the position of the piston plate can be manually adjusted as needed, which is quite practical.

[0005] To achieve the above object, the present invention provides the following technical solution: A microchannel heat exchanger includes a main body housing, and a radiator is fixedly installed on the outer surface of one side of the main body housing. A header is fixedly installed at the top of the main body housing. A fin frame and a diversion tube are fixedly installed inside the main body housing, and the fin frame and the diversion tube are longitudinally arranged alternately in sequence inside the main body housing. A slot is opened at the bottom of the header, and the header is communicated with the diversion tube through the slot. An air inlet pipe and an exhaust pipe are respectively fixedly installed on the outer surfaces of both ends of the header. A piston plate is provided inside the header, and an adjustment mechanism is installed inside the header, and the piston plate is installed on the adjustment mechanism to adjust the position of the piston plate through the adjustment mechanism;

[0006] A clamping post limiting mechanism is installed at the top end of the inner wall of the fin rack, and the fin rack is limited and fixed inside the main body housing through the clamping post limiting mechanism;

[0007] An observation mechanism is arranged on one side at the bottom end of the outer surface of the header pipe, and whether the inside of the header pipe is blocked is detected through the observation mechanism.

[0008] Furthermore, the adjusting mechanism includes three guide rods fixedly connected horizontally to one side of the inner wall of the header pipe. One ends of the three guide rods penetrate through the piston plate, and the piston plate is slidably connected to the guide rods. Three second magnetic blocks are fixedly installed on the outer surface of one side of the piston plate, and the three second magnetic blocks are respectively sleeved on the outer surfaces of the guide rods;

[0009] A tripod is arranged inside the header pipe on one side of the piston plate, and one ends of the three guide rods penetrate through the three corners of the tripod. First magnetic blocks are fixedly installed at the three corners of the tripod, and the first magnetic blocks are sleeved on the outer surfaces of the guide rods. The first magnetic blocks and the second magnetic blocks are opposite in the same grade.

[0010] Furthermore, a screw adjusting mechanism for adjusting the position of the tripod is arranged inside the header pipe. The screw adjusting mechanism includes a screw movably installed on one side of the inner wall of the header pipe, and one end of the screw penetrates through the center of the tripod, and the screw is threadedly connected to the tripod.

[0011] Furthermore, a through groove is opened on the outer surface of one end of the header pipe, a knob is arranged inside the through groove, the knob is rotatably connected to the header pipe through the through groove, and a first return spring is sleeved on the outer surface of the knob inside the through groove;

[0012] A connection groove matching the knob is opened on the outer surface of one end of the screw, and one end of the knob is clamped with the screw through the connection groove.

[0013] Furthermore, the clamping post limiting mechanism includes an installation pipe fixedly installed at the top end of the inner wall of the fin rack. A clamping post is arranged inside the installation pipe. A clamping groove matching the clamping post is opened on the inner wall of the main body housing, and one end of the clamping post penetrates through the top outer surface of the fin rack and is inserted into the clamping groove.

[0014] Furthermore, a baffle is fixedly installed on the outer surface of the clamping post. Grooves are opened on the outer surfaces of both sides of the baffle. Convex blocks are fixedly installed on both sides of the inner wall of the installation pipe below the baffle, and the convex blocks are matched with the grooves.

[0015] Furthermore, a second return spring is sleeved on the outer surface of the clamping post below the baffle. A first retaining ring is fixedly installed at the bottom end of the installation pipe, and the first retaining ring is sleeved on the outer surface of the clamping post. The upper and lower ends of the second return spring are respectively in contact with the baffle and the first retaining ring.

[0016] Further, the detection mechanism includes a communicating pipe fixedly installed on the outer surface of the diversion pipe. One end of the communicating pipe is communicated with the diversion pipe. One end inside the diversion pipe is integrally connected with an inner frame, and the inner frame is cross-shaped.

[0017] Further, a conduit is fixedly installed on the outer surface of the center of the inner frame. An inner block is arranged at one end of the conduit. An observation cover is fixedly installed at one end of the communicating pipe, and the observation cover is made of transparent plastic material.

[0018] Further, an inner rod is arranged inside the conduit, and one end of the inner rod is fixedly connected to the outer surface of the inner block. A stop block is fixedly installed at the other end of the inner rod. A third return spring is sleeved on the outer surface of the inner rod on one side of the stop block. A second retaining ring is fixedly installed at one end inside the conduit, and the second retaining ring is sleeved on the outer surface of the inner rod. Two ends of the third return spring are respectively in contact with the second retaining ring and the stop block.

[0019] The technical effects and advantages of the present invention:

[0020] 1. In the present invention, a piston plate is arranged in the manifold to separate the diversion pipe for intake and exhaust respectively, and the position of the piston arranged in the manifold can be adjusted as needed. When the pressure on the intake side is relatively high, the generated pressure difference will move the piston plate towards the outlet side, increasing the number of diversion pipes for intake. It can be adaptively adjusted according to different situations, greatly increasing the applicability of the device. And the position of the piston plate can be manually adjusted as needed, which is relatively practical.

[0021] 2. In the present invention, the fin frame is limited and installed by the way of the clamping post and the clamping groove. When cleaning is required, the clamping post can be disengaged from the clamping groove to release the limitation on the fin frame, and then the fin frame can be removed, which is convenient for cleaning and maintaining the fin frame and replacing the damaged fins. The installation and disassembly are relatively simple.

[0022] 3. In the present invention, by arranging the communicating pipe, during the process of the diversion pipe transporting fluid, the generated pressure will push the inner block inside the communicating pipe outwards, making the inner block enter the observation cover, so as to judge whether the corresponding diversion pipe is blocked, and the blocked diversion pipe can be processed in time to avoid affecting the heat exchange efficiency of the device. Description of the Drawings

[0023] Figure 1 is the schematic diagram of the overall structure of the present invention Figure 1 。

[0024] Figure 2 is the schematic diagram of the overall structure of the present invention Figure 2 。

[0025] Figure 3Cross-section of the manifold of the present invention.

[0026] Figure 4 Schematic diagram of the installation structure of the piston plate of the present invention.

[0027] Figure 5 For the present invention Figure 3 Enlarged view at location A of

[0028] Figure 6 Front view of the heat exchange mechanism of the present invention.

[0029] Figure 7 Schematic diagram of the structure of the installation pipe of the present invention.

[0030] Figure 8 Cross-section of the installation pipe of the present invention.

[0031] Figure 9 Cross-section of the connecting pipe of the present invention.

[0032] Figure 10 Cross-section of the conduit of the present invention.

[0033] Reference numerals: 1, main body housing; 11, heat dissipator; 2, manifold; 21, intake pipe; 22, exhaust pipe; 23, tripod; 231, first magnet; 24, screw; 25, guide rod; 26, piston plate; 261, second magnet; 27, through groove; 28, knob; 29, first return spring; 3, fin holder; 31, installation pipe; 32, clamping post; 33, baffle; 34, groove; 35, convex block; 36, second return spring; 37, first retaining ring; 4, diversion pipe; 41, connecting pipe; 42, observation cover; 43, inner frame; 44, conduit; 45, inner block; 46, inner rod; 47, third return spring; 48, second retaining ring; 49, stop block. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] According to Figures 1-5A microchannel heat exchanger shown includes a main body housing 1 and a radiator 11 fixedly installed on the outer surface of one side of the main body housing 1. A header pipe 2 is fixedly installed at the top end of the main body housing 1. A fin frame 3 and a guide pipe 4 are fixedly installed inside the main body housing 1, and the fin frame 3 and the guide pipe 4 are longitudinally arranged in an alternating manner inside the main body housing 1. A slot is opened at the bottom end of the header pipe 2, and the header pipe 2 is communicated with the guide pipe 4 through the slot. An intake pipe 21 and an exhaust pipe 22 are respectively fixedly installed on the outer surfaces of both ends of the header pipe 2. A piston plate 26 is arranged inside the header pipe 2. An adjusting mechanism is installed inside the header pipe 2, and the piston plate 26 is installed on the adjusting mechanism. The position of the piston plate 26 is adjusted through the adjusting mechanism;

[0036] Further, the adjusting mechanism includes three guide rods 25 horizontally and fixedly connected to one side of the inner wall of the header pipe 2. One ends of the three guide rods 25 penetrate through the piston plate 26, and the piston plate 26 is slidably connected to the guide rods 25. Three second magnetic blocks 261 are fixedly installed on the outer surface of one side of the piston plate 26, and the three second magnetic blocks 261 are respectively sleeved on the outer surfaces of the guide rods 25. A tripod 23 is arranged inside the header pipe 2 on one side of the piston plate 26, and one ends of the three guide rods 25 penetrate through the three corners of the tripod 23. A first magnetic block 231 is fixedly installed at the three corners of the tripod 23, and the first magnetic block 231 is sleeved on the outer surface of the guide rod 25. The first magnetic block 231 and the second magnetic block 261 are of the same polarity and face each other. When they are close, a certain repulsive force will be generated. After the pressure inside the header pipe 2 returns to normal, the repulsive force generated between the first magnetic block 231 and the second magnetic block 261 will reset the piston plate 26.

[0037] Further, a screw adjusting mechanism for adjusting the position of the tripod 23 is arranged inside the header pipe 2. The screw adjusting mechanism includes a screw rod 24 movably installed on one side of the inner wall of the header pipe 2, and one end of the screw rod 24 penetrates through the center of the tripod 23. The screw rod 24 is threadedly connected to the tripod 23. By driving the screw rod 24 to rotate through a knob, the screw rod 24 is threadedly connected to the tripod 23, and the tripod 23 is pushed along the guide rod 25 to one side. Thus, the first magnetic block 231 at the corner moves along the guide rod 25, and the repulsive force between the first magnetic block 231 and the second magnetic block 261 will push the piston plate 26 to one side, thereby adjusting the position of the piston plate 26.

[0038] Further, a through groove 27 is formed on the outer surface of one end of the manifold 2. A knob 28 is disposed inside the through groove 27. The knob 28 is rotatably connected to the manifold 2 through the through groove 27. A first return spring 29 is sleeved on the outer surface of the knob 28 inside the through groove 27. A connection groove matching the knob 28 is formed on the outer surface of one end of the screw 24. One end of the knob 28 is snap-connected to the screw 24 through the connection groove. Push the knob 28 inward to insert one end of the knob 28 into the connection groove at one end of the screw 24 for docking with the screw 24. During the inward pushing process of the knob 28, the first return spring 29 in the through groove 27 will be compressed. After adjustment, the first return spring 29 will push the knob 28 outward to reset, so that one end of the knob 28 disengages from the connection groove of the screw 24.

[0039] The specific implementation method is as follows: During use, the fluid enters the manifold 2 from one end of the intake pipe 21, then enters the diversion pipe 4 through the slot at the bottom end on one side of the piston plate 26 for heat exchange treatment, and then is led back to the manifold 2 through the slot on the other side of the piston plate 26 and discharged from the exhaust pipe 22. When the intake rate increases, the pressure on the intake side in the manifold 2 increases. The piston plate 26 is pushed by the pressure and moves along the guide rod 25 to one side, thereby increasing the number of slots on the intake side and improving the intake efficiency. During the movement, the second magnet 261 on one side will approach the first magnet 232. The same poles of the first magnet 231 and the second magnet 261 face each other, and a certain repulsive force will be generated when approaching. After the pressure in the manifold 2 returns to normal, the repulsive force generated between the first magnet 231 and the second magnet 261 will reset the piston plate 26 for use. When it is necessary to adjust the position of the piston plate 26 in advance, a tool can be inserted into the knob 28 at one end to push the knob 28 inward, so that one end of the knob 28 is inserted into the connection groove at one end of the screw 24 for docking with the screw 24. Then, drive the screw 24 to rotate through the knob. The screw 24 is threadedly connected to the tripod 23, and the tripod 23 is pushed along the guide rod 25 to one side. Thus, the first magnet 231 at the corner moves along the guide rod 25. The repulsive force between the first magnet 231 and the second magnet 261 will push the piston plate 26 to one side, thereby adjusting the position of the piston plate 26, which is relatively convenient. During the inward pushing process of the knob 28, the first return spring 29 in the through groove 27 will be compressed. After adjustment, the first return spring 29 will push the knob 28 outward to reset, so that one end of the knob 28 disengages from the connection groove of the screw 24.

[0040] According to Figures 6-8 A microchannel heat exchanger as shown, a clamping post limiting mechanism is installed at the top end of the inner wall of the fin frame 3, and the fin frame 3 is limited and fixed inside the main body housing 1 through the clamping post limiting mechanism;

[0041] Further, the pin limiting mechanism includes a mounting tube 31 fixedly installed at the top end of the inner wall of the fin frame 3. A pin 32 is arranged inside the mounting tube 31. A card slot matching the pin 32 is formed in the inner wall of the main body housing 1. One end of the pin 32 passes through the outer surface of the top end of the fin frame 3 and is inserted into the card slot. Pull the pin 32 downward, and the convex block 35 will pass through the groove 34 of the baffle 33, driving the pin 32 to disengage from the card slot at the upper end of the inner wall of the main body housing 1, releasing the limit on the fin frame 3, and then take out the fin frame 3 from the main body housing 1.

[0042] Further, a baffle 33 is fixedly installed on the outer surface of the pin 32. Grooves 34 are formed on the outer surfaces of both sides of the baffle 33. Convex blocks 35 are fixedly installed on both sides of the inner wall of the mounting tube 31 below the baffle 33, and the convex blocks 35 match the grooves 34. Rotate the pin 32 in the mounting tube 31 until the groove 34 on the baffle 33 corresponds to the convex block 35 on the inner wall of the mounting tube 31.

[0043] Further, a second return spring 36 is sleeved on the outer surface of the pin 32 below the baffle 33. A first retaining ring 37 is fixedly installed at the bottom end of the mounting tube 31, and the first retaining ring 37 is sleeved on the outer surface of the pin 32. The upper and lower ends of the second return spring 36 are respectively in contact with the baffle 33 and the first retaining ring 37. During the process of pulling the pin 32 downward, the baffle 33 will squeeze the second return spring 36;

[0044] The specific implementation method is as follows: During the heat exchange process, heat dissipation treatment will be carried out through the fin frame 3. When it is necessary to disassemble and clean the fin frame 3, it is necessary to rotate the pin 32 in the mounting tube 31 until the groove 34 on the baffle 33 corresponds to the convex block 35 on the inner wall of the mounting tube 31. Then pull the pin 32 downward, and the convex block 35 will pass through the groove 34 of the baffle 33, driving the pin 32 to disengage from the card slot at the upper end of the inner wall of the main body housing 1, releasing the limit on the fin frame 3, and then take out the fin frame 3 from the main body housing 1 and clean the taken-out fin frame 3. During the process of pulling the pin 32 downward, the baffle 33 will squeeze the second return spring 36. When installing after cleaning the fin frame 3, insert the fin frame 3 back to its original position so that one end of the pin 32 corresponds to the card slot on the main body housing 1. Then release the pin 32, and the second return spring 36 will push the baffle 33 upward, driving the pin 32 to be inserted into the card slot. At the same time, the baffle 33 moves above the convex block 35. Then rotate the pin 32 so that the groove 34 on the baffle 33 is misaligned with the convex block 35, thereby limiting the pin 32.

[0045] According to Figures 9-10A microchannel heat exchanger is shown, in which an observation mechanism is arranged on one side of the bottom end of the outer surface of the collecting pipe 2, and whether there is blockage inside the collecting pipe 2 is detected by the observation mechanism. The detection mechanism includes a connecting pipe 41 fixedly installed on the outer surface of the guide pipe 4, one end of the connecting pipe 41 is connected with the guide pipe 4, one end of the inner end of the guide pipe 4 is integrally connected with an inner frame 43, and the inner frame 43 is cross-shaped, and a conduit 44 is fixedly installed on the central outer surface of the inner frame 43, and an inner block 45 is arranged at one end of the conduit 44, and an observation cover 42 is fixedly installed at one end of the connecting pipe 41, and the observation cover 42 is made of transparent plastic. When the fluid flows in the guide pipe 4 and passes through the connecting pipe 41, the pressure generated by the fluid will push the inner block 45 inside the connecting pipe 41 outward, so that the inner block 45 enters the observation cover 42 for easy viewing.

[0046] Furthermore, an inner rod 46 is provided inside the conduit 44, and one end of the inner rod 46 is fixedly connected to the outer surface of the inner block 45, and a stopper 49 is fixedly installed on the other end of the inner rod 46. The outer surface of the inner rod 46 is located on one side of the stopper 49 and is sleeved with a third return spring 47. A second stop ring 48 is fixedly installed at one end of the inner part of the conduit 44, and the second stop ring 48 is sleeved on the outer surface of the inner rod 46. Both ends of the third return spring 47 are in contact with the second stop ring 48 and the stopper 49 respectively. When the inner block 45 moves outward, it will drive the inner rod 46 to slide along the second stop ring 48, and at the same time, the stopper 49 at one end will squeeze the third return spring 47.

[0047] The specific implementation method is as follows: when the fluid flows in the guide tube 4 and passes through the connecting tube 41, the pressure generated by the fluid will push the inner block 45 inside the connecting tube 41 outward, so that the inner block 45 enters the observation cover 42. The observation cover 42 is made of transparent material, which is convenient for viewing, so as to judge whether there is fluid passing through the guide tube 4. When the inner block 45 moves outward, it will drive the inner rod 46 to slide along the second baffle ring 48. At the same time, the baffle 49 at one end will squeeze the third return spring 47. When the fluid delivery is stopped, the third return spring 47 will pull the inner rod 46 back inward, driving the inner block 45 to disengage from the observation cover 42.

[0048] Working principle of the present invention:

[0049] Refer to the instruction manual Figures 1-5, during use, the fluid enters the manifold 2 from one end of the intake pipe 21, then enters the diversion pipe 4 through the slot at the bottom of one side of the piston plate 26 for heat exchange processing, and then is led back to the manifold 2 through the slot on the other side of the piston plate 26 and is discharged from the exhaust pipe 22. When the intake rate increases, the pressure on the intake side in the manifold 2 increases, and the piston plate 26 is pushed by the pressure and moves along the guide rod 25 to one side, thereby increasing the number of slots on the intake side and improving the intake efficiency. When it is necessary to adjust the position of the piston plate 26 in advance, a tool can be inserted into one end knob 28 to push the knob 28 inward, so that one end of the knob 28 is inserted into the connection slot at one end of the screw rod 24 to dock with the screw rod 24. Then, the screw rod 24 is driven to rotate by the knob. The screw rod 24 is threadedly connected to the tripod 23, and the tripod 23 is pushed along the guide rod 25 to one side. Thus, the first magnet 231 at the corner moves along the guide rod 25, and the repulsive force between the first magnet 231 and the second magnet 261 will push the piston plate 26 to one side, thereby adjusting the position of the piston plate 26;

[0050] Refer to the attached instruction manual Figures 6-8 , during the heat exchange process, heat dissipation treatment will be carried out through the fin frame 3. When it is necessary to disassemble and clean the fin frame 3, the latch in the mounting pipe 31 needs to be rotated until the groove 34 on the baffle 33 corresponds to the protrusion 35 on the inner wall of the mounting pipe 31. Then, the latch 32 is pulled downward, and the protrusion 35 will pass through the groove 34 of the baffle 33, driving the latch 32 to disengage from the card slot at the upper end of the inner wall of the main body housing 1, releasing the limit on the fin frame 3. Then, the fin frame 3 is taken out from the main body housing 1 and the taken-out fin frame 3 is cleaned. During the process of pulling the latch 32 downward, the baffle 33 will squeeze the second return spring 36. When installing after cleaning the fin frame 3, the fin frame 3 is inserted back to its original position;

[0051] Refer to the attached instruction manual Figures 9-10 , when the fluid flows through the diversion pipe 4 and passes through the connecting pipe 41, the pressure generated by the fluid will push the inner block 45 inside the connecting pipe 41 outward, causing the inner block 45 to enter the observation cover 42. The observation cover 42 is made of transparent material for convenient viewing, so as to judge whether there is fluid passing through the diversion pipe 4. During the outward movement of the inner block 45, it will drive the inner rod 46 to slide along the second retaining ring 48, and at the same time, the stop block 49 at one end will squeeze the third return spring 47. When the fluid delivery stops, the third return spring 47 will pull the inner rod 46 inward, driving the inner block 45 to disengage from the observation cover 42.

Claims

1. A microchannel heat exchanger, comprising a detection mechanism, a main body housing (1), and a heat dissipator (11) fixedly installed on the outer surface of one side of the main body housing (1). A manifold (2) is fixedly installed at the top of the main body housing (1). A fin frame (3) and a guide pipe (4) are fixedly installed inside the main body housing (1), and the fin frame (3) and the guide pipe (4) are longitudinally arranged alternately inside the main body housing (1). A slot is opened at the bottom end of the manifold (2), and the manifold (2) is communicated with the guide pipe (4) through the slot. Intake pipes (21) and exhaust pipes (22) are respectively fixedly installed on the outer surfaces of both ends of the manifold (2). Characterized in that: A piston plate (26) is arranged inside the manifold (2). An adjustment mechanism is installed inside the manifold (2), and the piston plate (26) is installed on the adjustment mechanism. The position of the piston plate (26) is adjusted through the adjustment mechanism; A clamping post limiting mechanism is installed at the top end of the inner wall of the fin frame (3). The fin frame (3) is limited and fixed inside the main body housing (1) through the clamping post limiting mechanism; An observation mechanism is arranged on one side of the bottom end of the outer surface of the manifold (2). Whether the inside of the manifold (2) is blocked is detected through the observation mechanism; The adjustment mechanism includes three guide rods (25) horizontally and fixedly connected to one side of the inner wall of the manifold (2). One ends of the three guide rods (25) penetrate through the piston plate (26), and the piston plate (26) is slidably connected to the guide rods (25). Three second magnetic blocks (261) are fixedly installed on the outer surface of one side of the piston plate (26), and the three second magnetic blocks (261) are respectively sleeved on the outer surfaces of the guide rods (25); A tripod (23) is arranged inside the manifold (2) on one side of the piston plate (26). One ends of the three guide rods (25) penetrate through the three corners of the tripod (23). A first magnetic block (231) is fixedly installed at the three corners of the tripod (23), and the first magnetic block (231) is sleeved on the outer surface of the guide rod (25). The first magnetic block (231) and the second magnetic block (261) are opposite in the same pole; A screw adjustment mechanism for adjusting the position of the tripod (23) is arranged inside the manifold (2). The screw adjustment mechanism includes a screw (24) movably installed on one side of the inner wall of the manifold (2), and one end of the screw (24) penetrates through the center of the tripod (23). The screw (24) is threadedly connected to the tripod (23); A through slot (27) is opened on the outer surface of one end of the manifold (2). A knob (28) is arranged inside the through slot (27). The knob (28) is rotatably connected to the manifold (2) through the through slot (27). A first return spring (29) is sleeved on the outer surface of the knob (28) inside the through slot (27); A connection slot matching the knob (28) is opened on the outer surface of one end of the screw (24). One end of the knob (28) is clamped to the screw (24) through the connection slot.

2. A microchannel heat exchanger according to claim 1, Characterized in that: The pin limiting mechanism includes an installation pipe (31) fixedly installed at the top end of the inner wall of the fin frame (3). A pin (32) is arranged inside the installation pipe (31). A clamping groove matching the pin (32) is formed in the inner wall of the main body housing (1). One end of the pin (32) penetrates through the outer surface of the top end of the fin frame (3) and is inserted into the clamping groove.

3. A microchannel heat exchanger according to claim 2, characterized in that: A baffle (33) is fixedly installed on the outer surface of the pin (32). Grooves (34) are formed on the outer surfaces of both sides of the baffle (33). On both sides of the inner wall of the installation pipe (31) and below the baffle (33), bumps (35) are fixedly installed, and the bumps (35) match the grooves (34).

4. A microchannel heat exchanger according to claim 3, characterized in that: A second return spring (36) is sleeved on the outer surface of the pin (32) below the baffle (33). A first retaining ring (37) is fixedly installed at the bottom end of the installation pipe (31), and the first retaining ring (37) is sleeved on the outer surface of the pin (32). The upper and lower ends of the second return spring (36) are respectively in contact with the baffle (33) and the first retaining ring (37).

5. A microchannel heat exchanger according to claim 1, characterized in that: The detection mechanism includes a communication pipe (41) fixedly installed on the outer surface of the diversion pipe (4). One end of the communication pipe (41) is communicated with the diversion pipe (4). An inner frame (43) is integrally connected to one end inside the diversion pipe (4), and the inner frame (43) is cross-shaped.

6. A microchannel heat exchanger according to claim 5, characterized in that: A conduit (44) is fixedly installed on the outer surface of the center of the inner frame (43). An inner block (45) is arranged at one end of the conduit (44). An observation cover (42) is fixedly installed at one end of the communication pipe (41), and the observation cover (42) is made of transparent plastic material.

7. A microchannel heat exchanger according to claim 6, characterized in that: An inner rod (46) is arranged inside the conduit (44), and one end of the inner rod (46) is fixedly connected to the outer surface of the inner block (45). A stop block (49) is fixedly installed at the other end of the inner rod (46). A third return spring (47) is sleeved on the outer surface of the inner rod (46) on one side of the stop block (49). A second retaining ring (48) is fixedly installed at one end inside the conduit (44), and the second retaining ring (48) is sleeved on the outer surface of the inner rod (46). The two ends of the third return spring (47) are respectively in contact with the second retaining ring (48) and the stop block (49).

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