Micro-channel heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a micro-channel heat exchanger which comprises a micro-channel heat exchanger body and two collecting pipes of the micro-channel heat exchanger body, a micro-channel flat pipe is arranged between the two collecting pipes, medium flowing pipes are arranged on the side faces of the collecting pipes, and communicating pipes are further fixedly connected to the side faces of the two collecting pipes. The side faces of the ends of the two adjacent communicating pipes on the two microchannel heat exchanger bodies are sleeved with clamping frames, the side faces of the ends, away from the collecting pipes, of the communicating pipes are fixedly connected with baffle rings, the side faces of the communicating pipes are sleeved with connecting rings matched with the baffle rings, and two symmetrical extrusion frames matched with the two connecting rings are arranged in the clamping frames. And two adjusting bolts of which the end parts are rotationally connected with the side surfaces of the corresponding extrusion frames are arranged on the opposite side surfaces of the clamping frame. According to the micro-channel heat exchanger, when one of the multiple micro-channel heat exchanger bodies located in the middle is detached, the micro-channel heat exchanger bodies on the two sides do not need to be completely detached, and then the micro-channel heat exchanger can be conveniently maintained in the later period.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and specifically relates to a microchannel heat exchanger. Background Art

[0002] The microchannel heat exchanger is composed of a header pipe, a microchannel flat tube and fins, and has the advantages of light weight, compact structure, high heat exchange efficiency, all-aluminum structure and convenient recycling. At the same time, the internal volume of the microchannel heat exchanger is small, which is conducive to greatly reducing the refrigerant filling amount and conforming to the industry trend of energy conservation and environmental protection.

[0003] In order to facilitate the combination of heat exchangers, many improvements have been made to the microchannel heat exchanger in the prior art. For example, the patent with the patent publication number CN221198101U discloses a microchannel heat exchanger, which includes two header pipes. Symmetrically and fixedly connected with connecting plates near the top and bottom between the two header pipes. Symmetrically and fixedly connected with a connecting mechanism one and a second clamping block near the center at both ends of the connecting plate. One end of the second clamping block close to the connecting mechanism one is fixedly connected with an inclined column, and the side end of the inclined column is conical. Horizontally and symmetrically fixedly connected with a connecting mechanism two and a connecting mechanism three near the center of the outer circle of the header pipe; in this utility model, by pulling the second pull plate, and then through the mutual cooperation between the clamping column, the second clamping pipe, the second ball, the abutting block and the third spring, the purpose of connecting the first clamping pipe and the second clamping pipe is completed, thereby solving the problem that the operator needs to continuously rotate the connector to fix the connector on the heat exchanger main body during the assembly of the heat exchanger main body, thus making it more troublesome to combine the heat exchangers.

[0004] The above patent has obvious beneficial effects, but there are still the following deficiencies in actual operation:

[0005] In the above comparative document, the two heat exchangers are inserted and connected through a series of clamping structures. In the prior art, if the installation position of the heat exchanger is limited and the heat exchanger cannot be inserted, that is, the two heat exchangers cannot be connected and installed. And in the existing situation, there is also a situation where more than two heat exchangers are connected and installed. When the heat exchanger in the middle position is damaged and needs to be disassembled, maintained or replaced, the heat exchangers on both sides need to be removed in sequence to disassemble and take out the heat exchanger in the middle position, which is not convenient for the later maintenance of the heat exchanger. Therefore, it is urgent in this field to improve the microchannel heat exchanger to solve the defects of the prior art. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a microchannel heat exchanger, which is convenient for the later maintenance of the microchannel heat exchanger.

[0007] To achieve the above object, the present utility model provides the following technical solution: A microchannel heat exchanger, including a microchannel heat exchanger body, the microchannel heat exchanger body has two header pipes, a microchannel flat tube is arranged between the two header pipes, a medium flow tube is arranged on the side of the header pipe, two adjacent ends of the two header pipes on the side of the microchannel heat exchanger body are sleeved with a clamping frame, a retaining ring is fixedly connected to the side of the communicating pipe far away from the header pipe, a connecting ring adapted to the retaining ring is sleeved on the side of the communicating pipe, two symmetric extrusion frames adapted to the two connecting rings are arranged in the clamping frame, two adjusting bolts with ends rotatably connected to the side of the corresponding extrusion frame are arranged on the opposite sides of the clamping frame, the adjusting bolts are used to adjust the position of the extrusion frame, and a limit nut is threadedly connected to the side of the adjusting bolt.

[0008] Preferably, first arc grooves are formed on the opposite sides of two adjacent connecting rings, and a first sealing ring is embedded in the first arc grooves.

[0009] Preferably, second arc grooves are formed on the opposite sides of the extrusion frame and the retaining ring, and a second sealing ring is embedded in the second arc grooves.

[0010] Preferably, the clamping frame is U-shaped, a first relief opening adapted to the communicating pipe is formed on one side of the clamping frame, and second relief openings adapted to the connecting ring are formed on the opposite side walls in the first relief opening.

[0011] Preferably, sliding grooves communicating with the second relief openings are formed on the opposite sides of the clamping frame, sliding blocks are slidably connected in the sliding grooves, and the adjusting bolts penetrate through the sliding blocks and are threadedly connected with the sliding blocks.

[0012] Preferably, an extrusion angle is formed on the side of the connecting ring, and the opposite side walls in the extrusion frame are adapted to the extrusion angle.

[0013] Preferably, one end of the sliding groove penetrates through the clamping frame, and the sliding block can be taken out of the sliding groove.

[0014] Aiming at the deficiencies of the prior art, the present utility model provides a microchannel heat exchanger, which overcomes the deficiencies of the prior art. The beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, through the cooperation of the clamping frame, the adjusting bolt, the extrusion frame and the retaining ring, it is convenient to disassemble a certain microchannel heat exchanger body in the middle of multiple microchannel heat exchanger bodies, without the need to disassemble all the microchannel heat exchanger bodies on both sides. Furthermore, it is convenient to maintain the microchannel heat exchanger in the later stage. At the same time, the clamping frame is detachable and can be reused, reducing the cost of replacing the microchannel heat exchanger. The extrusion of the connecting ring by the two extrusion frames also plays a role in centering the two communicating pipes, facilitating the connection and installation of the two communicating pipes.

[0016] 2. In the present utility model, the first sealing ring is embedded in the first arc-shaped groove, and the second sealing ring is embedded in the second arc-shaped groove, so as to improve the sealing performance after the two connecting rings are combined by the extrusion frame.

[0017] 3. In the present utility model, the sliding block can be taken out from the sliding groove, so that the extrusion frame can be replaced according to connecting rings of different sizes.

[0018] Other features and advantages of the present utility model will be described in the subsequent specification. Moreover, some of them will become obvious from the specification or be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the specification, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, but do not constitute a limitation to the present utility model.

[0020] Figure 1 It is a schematic structural diagram after multiple communicating pipes are connected in the present utility model;

[0021] Figure 2 It is a schematic structural diagram of the clamping frame in the present utility model;

[0022] Figure 3 It is a schematic cross-sectional structural diagram of the connecting ring and the communicating pipe, etc. in the present utility model;

[0023] Figure 4 It is a schematic structural diagram of the sliding groove in the present utility model;

[0024] Figure 5 It is a schematic structural diagram of the extrusion frame in the present utility model.

[0025] In the figure: 1, manifold pipe; 2, microchannel flat pipe; 3, communicating pipe; 4, medium flow pipe; 5, clamping frame; 6, retaining ring; 7, connecting ring; 8, extrusion frame; 9, adjusting bolt; 10, first arc-shaped groove; 11, first sealing ring; 12, second arc-shaped groove; 13, second sealing ring; 14, first relief opening; 15, second relief opening; 16, sliding groove; 17, sliding block; 18, limit nut; 19, extrusion angle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0027] Example 1

[0028] Please refer to Figures 1 - 5 , a microchannel heat exchanger, including a microchannel heat exchanger body, two header pipes 1 of the microchannel heat exchanger body, a microchannel flat tube 2 is provided between the two header pipes 1, a medium flow tube 4 is provided on the side of the header pipe 1, and two header pipes 1 are also fixedly connected with a connecting pipe 3 on the side. A clamping frame 5 is sleeved on the side of the end of two adjacent connecting pipes 3 on the two microchannel heat exchanger bodies. A retaining ring 6 is fixedly connected to the side of the end of the connecting pipe 3 far from the header pipe 1. A connecting ring 7 adapted to the retaining ring 6 is sleeved on the side of the connecting pipe 3. Two symmetric extrusion frames 8 adapted to the two connecting rings 7 are provided in the clamping frame 5. Two adjusting bolts 9 with ends rotatably connected to the side of the corresponding extrusion frame 8 are provided on the opposite sides of the clamping frame 5. The adjusting bolt 9 is used to adjust the position of the extrusion frame 8, and a limit nut 18 is threadedly connected to the side of the adjusting bolt 9.

[0029] Specific implementation method in this embodiment: The microchannel heat exchanger body in this embodiment is similar to the heat exchanger structure in the prior art, and the heat exchange principles of the two are the same. For example, the patent with the patent publication number CN221198101U discloses a microchannel heat exchanger. The improvement point in this embodiment is that after installing multiple microchannel heat exchanger bodies, it is convenient to remove and maintain the microchannel heat exchanger body in the middle position later; when connecting two adjacent microchannel heat exchanger bodies in this embodiment, align the opposite ends of the two adjacent connecting pipes 3, and place the connecting ring 7 on the side of the connecting pipe 3 and snap it on the side of the retaining ring 6. Insert the clamping frame 5 on the sides of the two connecting rings 7. Adjust the position of the extrusion frame 8 by rotating the adjusting bolt 9. The two extrusion frames 8 squeeze the two connecting rings 7. The two connecting rings 7 move towards each other. The two connecting rings 7 are in a sealed state, and the connecting ring 7 and the retaining ring 6 are also in a sealed state. Tighten the limit nut 18 to limit and fix the position of the adjusting bolt 9, thereby completing the connection and installation between the two connecting pipes 3. The required heat exchange medium flows in and out through the medium flow tube 4. The medium is divided by the header pipe 1 into the microchannel flat tube 2 and the connecting pipe 3 for heat exchange of the medium. When it is necessary to disassemble a certain one in the middle of multiple microchannel heat exchanger bodies, rotate the adjusting bolt 9 in the reverse direction so that the extrusion frame 8 is separated from the connecting ring 7, and take away the clamping frame 5, then the microchannel heat exchanger body in the middle position can be taken out and replaced. When maintaining a certain microchannel heat exchanger, it is not necessary to disassemble all the microchannel heat exchanger bodies on both sides, which is convenient for later maintenance of the microchannel heat exchanger. At the same time, the clamping frame 5 is detachable and can be reused, reducing the cost when replacing the microchannel heat exchanger. Squeezing the connecting ring 7 by the two extrusion frames 8 also has an effect of centering the two connecting pipes 3, which is convenient for connecting and installing the two connecting pipes 3.

[0030] Example 2

[0031] Please refer to Figure 3 , this embodiment includes the above-mentioned embodiment, and further includes: first arc-shaped grooves 10 are formed on opposite side surfaces of two adjacent connecting rings 7, first sealing rings 11 are embedded in the first arc-shaped grooves 10, second arc-shaped grooves 12 are formed on opposite side surfaces of the extrusion frame 8 and the retaining ring 6, and second sealing rings 13 are embedded in the second arc-shaped grooves 12.

[0032] Specific implementation manner in this embodiment: Before connecting two communicating pipes 3, embed the first sealing ring 11 in one of the first arc-shaped grooves 10 and embed the second sealing ring 13 in one of the second arc-shaped grooves 12. When the two connecting rings 7 are extruded and move towards each other, both the first sealing ring 11 and the second sealing ring 13 are extruded, thereby improving the sealing effect between the two connecting rings 7 and between the connecting ring 7 and the retaining ring 6.

[0033] Embodiment Three

[0034] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 , this embodiment includes all the above-mentioned embodiments, and further includes: the clamping frame 5 is U-shaped, a first relief opening 14 adapted to the communicating pipe 3 is formed on one side of the clamping frame 5, second relief openings 15 adapted to the connecting ring 7 are formed on opposite side walls in the first relief opening 14, sliding grooves 16 communicating with the second relief openings 15 are formed on opposite side surfaces of the clamping frame 5, sliding blocks 17 are slidably connected in the sliding grooves 16, an adjusting bolt 9 passes through the sliding blocks 17 and is threadedly connected to the sliding blocks 17, an extrusion angle 19 is formed on the side surface of the connecting ring 7, and opposite side walls in the extrusion frame 8 are adapted to the extrusion angle 19. One end of the sliding groove 16 penetrates through the clamping frame 5, and the sliding block 17 can be taken out of the sliding groove 16.

[0035] Specific implementation manner in this embodiment: When using the clamping frame 5, insert it into the sides of the two communicating pipes 3 through the first relief opening 14, insert it into the sides of the two connecting rings 7 through the second relief openings 15, insert the sliding blocks 17 into the sliding grooves 16, adjust the positions of the two extrusion frames 8, and rotate the adjusting bolt 9 to adjust the positions of the extrusion frames 8. The extrusion frames 8 cooperate with the extrusion angles 19 to position and squeeze the two connecting rings 7 together. The sliding blocks 17 can be taken out of the sliding grooves 16, so that the extrusion frames 8 can be replaced according to different sizes of the connecting rings 7.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A microchannel heat exchanger, comprising a microchannel heat exchanger body, the microchannel heat exchanger body having two headers (1), a microchannel flat tube (2) being arranged between the two headers (1), and a medium flow tube (4) being arranged on the side of the header (1), characterized in that: The two collecting pipes (1) are also fixedly connected to the side surfaces of the two connecting pipes (3); the end surfaces of two adjacent connecting pipes (3) on the two microchannel heat exchanger bodies are sleeved with a clamping frame (5); the end surface of the connecting pipe (3) away from the collecting pipe (1) is fixedly connected to a retaining ring (6); the side surface of the connecting pipe (3) is sleeved with a connecting ring (7) adapted to the retaining ring (6); two symmetrical extrusion frames (8) adapted to the two connecting rings (7) are arranged in the clamping frame (5); the opposite side surfaces of the clamping frame (5) are provided with two adjusting bolts (9) whose ends are rotatably connected to the corresponding side surfaces of the extrusion frames (8); the adjusting bolts (9) are used to adjust the position of the extrusion frames (8); the side surfaces of the adjusting bolts (9) are threadedly connected with limiting nuts (18).

2. The microchannel heat exchanger according to claim 1, characterized in that: The opposite sides of two adjacent connecting rings (7) are each provided with a first arc-shaped groove (10), and a first sealing ring (11) is embedded in the first arc-shaped groove (10).

3. The microchannel heat exchanger according to claim 1, characterized in that: The extrusion frame (8) and the side faces opposite to the retaining ring (6) are both provided with a second arc-shaped groove (12), and a second sealing ring (13) is embedded in the second arc-shaped groove (12).

4. The microchannel heat exchanger according to claim 1, characterized in that: The clamping frame (5) is in a U shape, and a first clearance opening (14) adapted to the connecting pipe (3) is provided on one side of the clamping frame (5), and a second clearance opening (15) adapted to the connecting ring (7) is provided on the opposite side wall inside the first clearance opening (14).

5. The microchannel heat exchanger according to claim 4, characterized in that: The opposite sides of the clamping frame (5) are provided with sliding grooves (16) communicating with the second clearance opening (15), a sliding block (17) is slidably connected in the sliding groove (16), and the adjusting bolt (9) passes through the sliding block (17) and is threadedly connected to the sliding block (17).

6. The microchannel heat exchanger according to claim 1, characterized in that: An extrusion angle (19) is provided on the side of the connecting ring (7), and the opposite side wall inside the extrusion frame (8) is adapted to the extrusion angle (19).

7. The microchannel heat exchanger according to claim 5, characterized in that: One end of the sliding groove (16) passes through the clamping frame (5), and the sliding block (17) can be taken out from the sliding groove (16).

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