Micro-channel dry cooler

Abstract

The utility model belongs to the technical field of micro-channel heat exchangers, and particularly relates to a micro-channel dry cooler which solves the problems that flexible disassembly and assembly of a liquid inlet pipe and a liquid outlet pipe cannot be achieved, and exhaust or liquid drainage operation cannot be conveniently conducted. The micro-channel dry cooler comprises two collecting pipes and a plurality of flat pipes connected between the two collecting pipes, each collecting pipe is provided with a switching seat communicated with a collecting cavity, each switching seat is provided with a quick connection structure used for being detachably connected with a liquid inlet and outlet pipe, and each collecting pipe is further provided with at least one discharging structure. The effect of flexible and rapid butt joint installation of the liquid inlet and outlet pipe and the collecting pipe is achieved, and meanwhile real-time exhaust or liquid drainage operation can be conveniently achieved.

Description

Technical Field

[0001] This utility model belongs to the field of microchannel heat exchanger technology, and specifically relates to a microchannel dry cooler. Background Technology

[0002] A microchannel dry cooler is a dry cooler based on microchannel technology. Its working principle is to achieve heat exchange between air and heat exchange medium by having heat exchange medium flow inside the tube and natural air flow outside the tube, thereby achieving the purpose of cooling. Its manifold often needs to be connected to inlet and outlet liquid pipes to realize the input or output of heat exchange medium.

[0003] However, in most existing technologies, the connection between the inlet / outlet pipe and the manifold is achieved by welding, which cannot achieve flexible detachable quick installation, making subsequent maintenance and disassembly inconvenient. Moreover, there is generally no discharge structure on the inlet / outlet pipe, making it difficult to perform liquid or gas discharge operations when the internal pressure is too high or there is too much residual gas, and debugging is inconvenient. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a microchannel dry cooler.

[0005] To achieve the innovative objectives of this utility model, the following technical solutions can be used:

[0006] A microchannel dry cooler includes two manifolds and several flat tubes connected between the two manifolds. Each manifold is provided with a connector that communicates with a manifold cavity. The connector is provided with a quick-connect structure for detachable connection with inlet and outlet liquid pipes. Each manifold is also provided with at least one discharge structure.

[0007] The microchannel dry cooler of this utility model mainly consists of two manifolds and a flat tube connecting the two manifolds. The heat exchange medium flows from one manifold through the flat tube to the other manifold. When flowing into the flat tube, it exchanges heat with the air through the tube wall, which is the prior art. The adapter is connected to the inlet and outlet liquid pipes to realize the input or output of the heat exchange medium. The quick-connect structure on the adapter can realize quick connection with the inlet and outlet liquid pipes. This connection also has flexible disassembly. In addition, the manifold is also equipped with a discharge structure, which can be used to drain liquid or air to balance the internal and external pressure, and can also be used to drain the internal heat exchange medium when needed.

[0008] In the aforementioned microchannel dry cooler, the adapter seat has an arc-shaped opening with an inner diameter that matches the outer diameter of the manifold on its side, bottom, or between the side and bottom. The arc-shaped opening fits against and is fixed to the wall of the manifold. The adapter seat has a circular connection port at its end, and a quick-connect fitting is provided inside the connection port.

[0009] The shape and size of the arc-shaped opening match the manifold, and its periphery fits perfectly against the wall of the manifold. It is fixed by welding to ensure the sealing of the connection between the adapter and the manifold. The connection port on the adapter is used to set up a quick-connect fitting, which can be detachably and quickly connected to the inlet and outlet liquid pipes.

[0010] In the aforementioned microchannel dry cooler, the inner end of the quick-connect connector is inserted into the connection port and fixed by welding or by removable thread; the outer end of the quick-connect connector is provided with a chuck-type interface or a threaded interface.

[0011] The outer diameter of the inner end of the quick-connect coupling is compatible with the inner diameter of the connection port. They can be fixed together by welding to ensure structural strength, or by threading, allowing for flexible disassembly. Preferably, an easy-entry chamfer can be provided at the opening of the connection port and / or the end of the inner end to facilitate insertion. The chuck-type or threaded interface on the outer end of the connection allows for quick docking with the inlet / outlet pipes, and this docking is also flexible and detachable. Of course, the inlet / outlet pipes also have corresponding matching structures. The specific details of the chuck-type structure and threaded interface are common knowledge and will not be elaborated further.

[0012] In the aforementioned microchannel dry cooler, the connection port is provided with an annular step with a stepped surface facing the quick-connect fitting, and the annular step is circumferentially distributed with axially extending first annular grooves.

[0013] The annular step can position the insertion depth of the inner end of the installation. The thickness of the annular step is adapted to the thickness of the inner end of the installation, that is, the inner wall of the inner end of the connection port and the inner wall of the inner end of the installation can be smoothly connected to ensure the smooth flow of the heat exchange medium. In addition, the first annular groove on it facilitates the setting of the corresponding sealing structure.

[0014] In the aforementioned microchannel dry cooler, a first sealing ring is provided in the first annular groove, and the end face of the inner mounting end is in contact with the first sealing ring.

[0015] As the first option for the sealing structure between the quick-connect coupling and the adapter, the first sealing ring is fitted into the first annular groove, with its outer end face tightly against the end face of the inner end, thus achieving end face sealing.

[0016] In the aforementioned microchannel dry cooler, an annular tenon is provided on the inner end of the mounting device. The annular tenon extends into the first annular groove, and the sidewall and end face of the annular tenon are provided with sealant or an elastic sealing layer.

[0017] As a second option, an axially extending annular tenon is provided circumferentially on the inner end of the mounting. The annular tenon extends into the first annular groove. The sealant or elastic sealing layer between the annular tenon and the first annular groove can apply a sealing effect from both the inner and outer sides and the end face, resulting in a better sealing effect.

[0018] In the aforementioned microchannel dry cooler, the discharge structure includes a tubular base, which is disposed on a manifold and communicates with the manifold cavity through inlet and outlet liquid passages on the manifold. The discharge port of the tubular base is detachably sealed by a plug.

[0019] The manifold is equipped with a tubular base that communicates with the manifold cavity. The tubular base has a discharge port of a certain length, which helps to ensure the strength of the plug connection. Moreover, the plug and the discharge port are detachably connected, which is convenient for disassembly and assembly.

[0020] In the aforementioned microchannel dry cooler, the plug is T-shaped and includes an integrally connected large-head turning part and a round rod part. The round rod part engages with the internal thread in the discharge port part through its threaded section.

[0021] The plug is similar to a bolt, with a T-shaped axial cross-section. The threaded section of the round rod is threaded to the discharge port, ensuring flexible disassembly. Furthermore, to enable rotation of the plug, the large-end screwing part is hexagonal, and / or, the outer end face of the large-end screwing part is provided with an internal hexagonal hole, a cross hole, or a slotted hole, allowing the plug to be rotated using a corresponding wrench or screwdriver.

[0022] In the aforementioned microchannel dry cooler, the round rod portion includes a threaded section at the front end of the round rod portion and a reduced diameter section at the rear end of the round rod portion, with a pressure balance channel provided between the reduced diameter section and the threaded section; the outer diameter of the threaded section is adapted to the inner diameter of the discharge port, but is larger than the outer diameter of the reduced diameter section.

[0023] The first half of the round rod is a threaded section, while the second half is a reduced-diameter section with a smaller outer diameter. An annular gap is formed between the reduced-diameter section and the discharge port. The air pressure balance channel connects the side wall of the reduced-diameter section and the front end face of the threaded section, that is, it connects the annular gap and the collection cavity. This allows air to enter and exit through the air pressure balance channel when the plug is screwed in or out, especially when the inner end face of the large head is not in contact with the end face of the tubular base, so as to achieve the balance of internal and external air pressure and facilitate disassembly and assembly.

[0024] In the aforementioned microchannel dry cooler, an external air pressure balance hole is provided on the side wall of the reduced diameter section, and an internal air pressure balance hole is provided on the end face of the threaded section. The internal air pressure balance hole and the external air pressure balance hole are connected to form an air pressure balance channel.

[0025] The external air pressure balance hole is radially opened on the reduced diameter section, and the internal air pressure balance hole is axially opened on the threaded section. The air pressure balance channel between them can achieve the connection between the two ends of the threaded section.

[0026] In the aforementioned microchannel dry cooler, a second annular groove is provided on the inner end face of the large-head screwing part, and a second sealing ring is provided in the second annular groove. The second sealing ring is in contact with the end face of the tubular base.

[0027] A second sealing ring is provided on the inner side of the large-end screwing part. This second sealing ring is in close contact with the end face of the tubular base to achieve circumferential sealing between the tubular base and the large-end screwing part.

[0028] Compared with the prior art, the present invention has the following main advantages:

[0029] 1. The quick-connect structure on the adapter allows for quick connection with the inlet and outlet pipes. This connection is also flexible and detachable. In addition, the manifold is equipped with a discharge structure, which can be used for draining liquid or air to balance the internal and external pressures. It can also be used to drain the internal heat exchange medium when needed.

[0030] 2. The adapter is equipped with a quick-connect fitting at the connection port, which can be detachably and quickly connected to the inlet and outlet liquid pipes.

[0031] 3. The annular step can position the insertion depth of the inner end of the installation. The thickness of the annular step is adapted to the thickness of the inner end of the installation, that is, the inner wall of the inner end of the connection port and the inner wall of the inner end of the installation can be smoothly connected to ensure the smooth flow of the heat exchange medium. In addition, the first annular groove on it facilitates the setting of the corresponding sealing structure.

[0032] 4. Axially extending annular tenons are provided circumferentially on the inner end of the mounting device. The annular tenons are inserted into the first annular groove. The sealant or elastic sealing layer between the annular tenons and the first annular groove can apply a sealing effect from both the inner and outer sides and the end face, resulting in a better sealing effect.

[0033] 5. The first half of the round rod is a threaded section, while the second half is a reduced-diameter section with a smaller outer diameter. An annular gap is formed between the reduced-diameter section and the discharge port. The air pressure balance channel connects this annular gap and the collection chamber, so that when the plug is screwed in or out, especially when the inner end face of the large head is not in contact with the end face of the tubular base, air can enter and exit through the air pressure balance channel to achieve the balance of internal and external air pressure, which is convenient for disassembly and assembly. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure provided by this utility model;

[0035] Figure 2 yes Figure 1 Enlarged detail view of point A in the middle;

[0036] Figure 3 This is a cross-sectional schematic diagram of the quick-connect structure provided by this utility model (Example 1);

[0037] Figure 4 This is a cross-sectional schematic diagram of the emission structure provided by this utility model;

[0038] Figure 5 This is a schematic diagram of the structure of the adapter provided by this utility model;

[0039] Figure 6 This is a schematic diagram of the structure of the quick-connect coupling provided by this utility model;

[0040] Figure 7 This is a schematic diagram of the structure of the plug provided by this utility model;

[0041] Figure 8 This is a cross-sectional schematic diagram of the fit between the annular tenon and the first annular groove provided by this utility model (Example 2).

[0042] In the diagram, 1 is the manifold, 2 is the flat tube, 3 is the adapter, 4 is the quick-connect structure, 5 is the discharge structure, 6 is the arc-shaped opening, 7 is the connection port, 8 is the quick-connect fitting, 9 is the inner installation end, 10 is the outer connection end, 11 is the chuck interface, 12 is the annular step, 13 is the first annular groove, 14 is the first sealing ring, 15 is the annular tenon, 16 is the elastic sealing layer, 17 is the tubular base, 18 is the inlet / outlet liquid passage, 19 is the discharge port, 20 is the plug, 21 is the large-end screwing part, 22 is the round rod part, 23 is the threaded section, 24 is the reduced diameter section, 25 is the air pressure balance channel, 26 is the external air pressure balance hole, 27 is the internal air pressure balance hole, 28 is the second annular groove, and 29 is the second sealing ring. Detailed Implementation

[0043] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0044] Example 1

[0045] Specific implementation examples Figure 1-7 As shown, this microchannel dry cooler includes two manifolds 1 and several flat tubes 2 connected between the two manifolds 1. The manifold 1 is provided with a transition seat 3 that communicates with the manifold cavity. The transition seat 3 is provided with a quick-connect structure 4 for detachable connection with the inlet and outlet liquid pipes. The manifold 1 is also provided with two sets of discharge structures 5.

[0046] Specifically, this microchannel dry cooler mainly consists of two manifolds 1 and a flat tube 2 connecting the two manifolds 1. The heat exchange medium flows from one manifold 1 through the flat tube 2 to the other manifold 1. When flowing into the flat tube 2, it exchanges heat with the air through the tube wall. The adapter 3 is connected to the inlet and outlet pipes to realize the input or output of the heat exchange medium. The quick-connect structure 4 on the adapter 3 can realize quick connection with the inlet and outlet pipes. This connection also has flexible disassembly. In addition, a discharge structure 5 is provided on the manifold 1, which can be used for liquid or air discharge to balance the internal and external pressure. It can also be used to drain the internal heat exchange medium when needed. There are two sets of discharge structures 5, located at the top and side of the manifold 1 respectively. The extension directions of the two are at right angles. The top discharge structure 5 is more suitable for air discharge, while the side one is more suitable for liquid discharge.

[0047] like Figure 1 , 2 As shown in Figures 3, 5, and 6, the adapter 3 has an arc-shaped opening 6 with an inner diameter adapted to the outer diameter of the manifold 1 between its side and bottom. The arc-shaped opening 6 fits against and is fixed to the wall of the manifold 1. The adapter 3 has a circular connection port 7 at its end, and a quick-connect connector 8 is provided inside the connection port 7. The inner end 9 of the quick-connect connector 8 is inserted into the connection port 7 and fixed by welding. The outer end 10 of the quick-connect connector 8 has a stainless steel chuck-type interface 11.

[0048] Specifically, the shape and size of the arc-shaped opening 6 match the manifold 1, and its periphery fits snugly against the wall of the manifold 1. It is fixed by welding, ensuring a tight seal between the adapter 3 and the manifold 1. The connection port 7 on the adapter 3 is used to install a quick-connect fitting 8, which can be detachably and quickly connected to the inlet and outlet pipes. The outer diameter of the inner end 9 of the quick-connect fitting 8 is compatible with the inner diameter of the connection port 7, and the two are fixed by welding to ensure structural strength. Furthermore, an easy-entry chamfer is provided at the opening of the connection port 7 to facilitate quick insertion of the inner end 9. The chuck-type interface 11 allows for quick docking with the inlet and outlet pipes, and this docking is flexible and detachable. Corresponding matching structures are also provided on the inlet and outlet pipes. The chuck-type structure 11 is made of stainless steel, making it sturdy, durable, and resistant to corrosion.

[0049] like Figure 3 , 5 As shown, the connection port 7 has an annular step 12 with its stepped surface facing the quick-connect fitting. The annular step 12 has axially extending first annular grooves 13 distributed circumferentially. A first sealing ring 14 is provided in the first annular groove 13, and the end face of the inner end 9 is in contact with the first sealing ring 14.

[0050] Specifically, the annular step 12 can position the insertion depth of the inner end 9. The thickness of the annular step 12 is adapted to the thickness of the inner end 9, that is, the inner wall of the inner end of the connection port 7 and the inner wall of the inner end 9 can be smoothly connected to ensure the smooth flow of the heat exchange medium. The first sealing ring 14 is stuck in the first annular groove 13, and its outer end face is in close contact with the end face of the inner end 9 to achieve end face sealing.

[0051] like Figure 1 , 2 As shown in Figures 4 and 7, the discharge structure 5 includes a tubular base 17, which is mounted on the manifold 1 and communicates with the manifold cavity through the inlet / outlet liquid passage 18 on the manifold 1. The discharge port 19 of the tubular base 17 is detachably sealed by a plug 20. The plug 20 is T-shaped and includes an integrally connected large-head screwing part 21 and a round rod part 22. The large-head screwing part 21 is a hexagonal bolt head, and the round rod part 22 engages with the internal thread in the discharge port part 19 through its threaded section 23. The round rod part 22 includes a threaded section 23 at the front end of the round rod part and a reduced-diameter section 24 at the rear end of the round rod part 22. A pressure balance channel 25 is provided between the reduced-diameter section 24 and the threaded section 23. The outer diameter of the threaded section 23 is adapted to the inner diameter of the discharge port part 19, but is larger than the outer diameter of the reduced-diameter section 24.

[0052] Specifically, the manifold 1 is provided with a tubular base 17 that communicates with the manifold cavity. The tubular base 17 has a discharge port 19 of a certain length, which helps to ensure the strength of the connection of the plug 20. Moreover, the plug 20 and the discharge port 19 are detachably connected, which is convenient for disassembly and assembly. The plug 20 is similar to a bolt, and its axial cross section is T-shaped. The threaded section 23 of the round rod 22 is threaded to the discharge port 19, which ensures flexible disassembly. The first half of the round rod 22 is set as the threaded section 23, and the second half is a reduced diameter section 24 with a smaller outer diameter. An annular gap is formed between the reduced diameter section 24 and the discharge port 19. The air pressure balance channel 25 connects the annular gap and the manifold cavity, so that when the plug 20 is screwed in or out, especially when the inner end face of the large end screwing part 21 is not in contact with the end face of the tubular base 17, air can enter and exit through the air pressure balance channel 25 to achieve the balance of internal and external air pressure, which is convenient for disassembly and assembly.

[0053] In this embodiment, an external air pressure balance hole 26 is provided on the side wall of the reduced diameter section 24, and an internal air pressure balance hole 27 is provided on the end face of the threaded section 23. The internal air pressure balance hole 27 and the external air pressure balance hole 26 are connected to form an air pressure balance channel 25. A second annular groove 28 is provided on the inner end face of the large-end screwing part 21, and a second sealing ring 29 is provided in the second annular groove 28. The second sealing ring 29 is in contact with the end face of the tubular base 17.

[0054] Specifically, the external air pressure balance hole 26 is radially opened on the reduced diameter section 24, and the internal air pressure balance hole 27 is axially opened on the threaded section 23. The air pressure balance channel 25 between them can achieve communication between the two ends of the threaded section 23. A second sealing ring 29 is provided on the inner side of the large-end screwing part 21. The second sealing ring 29 is in close contact with the end face of the tubular base 17 to achieve circumferential sealing between the tubular base 17 and the large-end screwing part 21.

[0055] Working principle: When connecting the inlet and outlet pipes, simply align the ends of the inlet and outlet pipes with the chuck-type interface 11 of the quick-connect coupling 8. If the internal pressure is too high or there is too much residual gas inside, the top plug 20 can be unscrewed to release the gas. When drainage is required, the side plug 20 can be unscrewed to open the drain port 19.

[0056] Example 2

[0057] The working principle of this embodiment is basically the same as that of embodiment 1, except that the sealing structure between the quick-connect connector 8 and the adapter 3 is different.

[0058] Specific implementation examples Figure 8 As shown, an annular tenon 15 is provided on the inner end 9 of the installation. The annular tenon 15 extends into the first annular groove 13. An elastic sealing layer 16 is provided on the side wall and end face of the annular tenon 15.

[0059] Specifically, an axially extending annular tenon 15 is provided circumferentially on the inner end 9 of the mounting. The annular tenon 15 extends into the first annular groove 13, and the elastic sealing layer 16 can apply a sealing effect from the inner and outer sides and the end face, resulting in a better sealing effect.

[0060] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A microchannel dry cooler, comprising two manifolds (1) and a plurality of flat tubes (2) connected between the two manifolds (1), characterized in that, The manifold (1) is provided with a transition seat (3) that communicates with the manifold cavity. The transition seat (3) is provided with a quick-connect structure (4) for detachable connection with the inlet and outlet pipes. The manifold (1) is also provided with at least one discharge structure (5).

2. The microchannel dry cooler according to claim 1, characterized in that, The adapter (3) has an arc-shaped opening (6) with an inner diameter that is adapted to the outer diameter of the manifold (1) on its side, bottom, or between the side and bottom. The arc-shaped opening (6) fits against the wall of the manifold (1) and is fixed. The adapter (3) has a circular connection port (7) at its end. A quick-connect connector (8) is provided in the connection port (7).

3. The microchannel dry cooler according to claim 2, characterized in that, The inner end (9) of the quick-connect connector (8) is inserted into the connection port (7) and fixed by welding or by threaded detachment; the outer end (10) of the quick-connect connector (8) is provided with a chuck-type interface (11) or a threaded interface.

4. The microchannel dry cooler according to claim 3, characterized in that, The connection port (7) is provided with an annular step (12) with the stepped surface facing the quick-connect connector, and the annular step (12) is circumferentially distributed with an axially extending first annular groove (13).

5. The microchannel dry cooler according to claim 4, characterized in that, The first annular groove (13) is provided with a first sealing ring (14), and the end face of the mounting inner end (9) is in contact with the first sealing ring (14); Alternatively, the inner end (9) of the mounting is provided with an annular tenon (15), the annular tenon is inserted into the first annular groove (13), and the side wall and end face of the annular tenon (15) are provided with sealant or elastic sealing layer (16).

6. The microchannel dry cooler according to claim 1, characterized in that, The discharge structure (5) includes a tubular base (17), which is disposed on the manifold (1) and connected to the manifold cavity through the inlet and outlet liquid passage (18) on the manifold (1). The discharge port (19) of the tubular base (17) is detachably closed by a plug (20).

7. The microchannel dry cooler according to claim 6, characterized in that, The plug (20) is T-shaped and includes an integrally connected large-head screwing part (21) and a round rod part (22). The round rod part (22) engages with the internal thread in the discharge port part (19) through its threaded section (23).

8. The microchannel dry cooler according to claim 7, characterized in that, The round rod portion (22) includes a threaded section (23) at the front end of the round rod portion and a reduced diameter section (24) at the rear end of the round rod portion (22). An air pressure balance channel (25) is provided between the reduced diameter section (24) and the threaded section (23). The outer diameter of the threaded section (23) is adapted to the inner diameter of the discharge port (19), but is larger than the outer diameter of the reduced diameter section (24).

9. The microchannel dry cooler according to claim 8, characterized in that, The side wall of the reduced diameter section (24) is provided with an external air pressure balance hole (26), and the end face of the threaded section (23) is provided with an internal air pressure balance hole (27). The internal air pressure balance hole (27) and the external air pressure balance hole (26) are connected to form an air pressure balance channel (25).

10. The microchannel dry cooler according to claim 8, characterized in that, The inner end face of the large-head screwing part (21) is provided with a second annular groove (28), and a second sealing ring (29) is provided in the second annular groove (28). The second sealing ring (29) is in contact with the end face of the tubular base (17).

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