Heat Exchanger

Abstract

The present invention provides a heat exchanger, which includes a flat tube, wherein the flat tube has a refrigerant cavity, an inlet, an outlet, and two through holes, wherein the inlet and the outlet are respectively located at the two ends of the refrigerant cavity, and both are connected to the refrigerant cavity; the two through holes are respectively located at the two ends of the refrigerant cavity, and both are not connected to the refrigerant cavity. With this solution, since the flat tube has an inlet, an outlet, and two through holes, when multiple flat tubes cooperate with a liquid collecting pipe (liquid inlet pipe or liquid outlet pipe) of the heat exchanger, different flat tubes can choose to use the inlet or outlet to connect with the liquid collecting pipe, and use the through holes to avoid the liquid collecting pipe, so that different components in the heat exchanger are easy to arrange and assemble to realize a dual process. Compared with the prior art, there is no need to set up complex isolation components and other structures, which simplifies the structure of the heat exchanger and facilitates manufacturing and assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to a heat exchanger. Background Art

[0002] The prior art discloses a microchannel heat exchanger for dual compressors, the heat exchanger includes a flat tube group and a header, the flat tube group is arranged in parallel along the axial direction of the header, the header includes a first header arranged at the left end of the flat tube group and a second header arranged at the right end of the flat tube group, the header is provided with an isolation component that divides the inner cavity of the header into an upper inner cavity and a lower inner cavity, and counting from the front end of the header, the left end of the odd-numbered flat tube group is connected to the upper inner cavity of the first header, and the right end is connected to the lower inner cavity of the second header, and the left end of the even-numbered flat tube group is connected to the lower inner cavity of the first header, and the right end is connected to the upper inner cavity of the second header. This solution can ensure that when a compressor is turned on, the fin part of the heat exchanger can still achieve full contact and heat exchange with another flow path, maximize the use of the heat exchange area of ​​the heat exchanger, and reasonably utilize wind energy, electric energy and other energy, improve heat exchange efficiency, and achieve energy saving. However, due to the limitation of the flat tube structure, the heat exchanger needs to be provided with complex isolation components and other structures in order to realize the dual flow, which results in a complex structure and inconvenience in manufacturing and assembly. Summary of the invention

[0003] The present invention provides a heat exchanger to solve the problem that the double-pass heat exchanger in the prior art has a complex structure and is inconvenient to manufacture and assemble.

[0004] In order to solve the above problems, the present invention provides a heat exchanger, including a flat tube, wherein the flat tube has a refrigerant cavity, an inlet, an outlet and two through holes, wherein the inlet and the outlet are respectively located at two ends of the refrigerant cavity, and the inlet and the outlet are both connected to the refrigerant cavity; the two through holes are respectively located at two ends of the refrigerant cavity, and the two through holes are not connected to the refrigerant cavity.

[0005] Further, there are a plurality of flat tubes, and the plurality of flat tubes include first flat tubes and second flat tubes arranged alternately. The heat exchanger also includes a first liquid inlet pipe, a second liquid inlet pipe, a first liquid outlet pipe, and a second liquid outlet pipe. The first inlet of each of the first flat tubes is connected to the first liquid inlet pipe, the first outlet of each of the first flat tubes is connected to the first liquid outlet pipe, the second inlet of each of the second flat tubes is connected to the second liquid inlet pipe, and the second outlet of each of the second flat tubes is connected to the second liquid outlet pipe; the two through holes of the first flat tube are respectively a first through hole and a second through hole, and the two through holes of the second flat tube are respectively a third through hole and a fourth through hole, the first through hole is arranged correspondingly to the second outlet, the second through hole is arranged correspondingly to the second inlet, the third through hole is arranged correspondingly to the first inlet, and the fourth through hole is arranged correspondingly to the first outlet, the first through hole is connected to the second liquid outlet pipe, the second through hole is connected to the second liquid inlet pipe, the third through hole is connected to the first liquid inlet pipe, and the fourth through hole is connected to the first liquid outlet pipe.

[0006] Furthermore, the first liquid inlet pipe and the second liquid outlet pipe are located at one end of the first flat tube, and the first liquid outlet pipe and the second liquid inlet pipe are located at the other end of the first flat tube.

[0007] Further, the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe and the second liquid outlet pipe are arranged along the length direction of the first flat tube; or, the first liquid inlet pipe and the second liquid outlet pipe are distributed along the width direction of the first flat tube, and the first liquid outlet pipe and the second liquid inlet pipe are distributed along the width direction of the first flat tube.

[0008] Furthermore, the flat tube includes two heat exchange plates sealed and connected together, and the two heat exchange plates are symmetrically arranged relative to a preset symmetry plane.

[0009] Further, the heat exchange plate includes a plate body, a welding edge arranged on the periphery of the plate body, a first raised surface and a second raised surface arranged at intervals at both ends of the plate body, and the welding edge, the first raised surface and the second raised surface are all located on the same side of the plate body; the area between the plate bodies of the two heat exchange plates forms the refrigerant cavity, the welding edges of the two heat exchange plates are welded together, the first raised surfaces of the two heat exchange plates are welded together, and the second raised surfaces of the two heat exchange plates are welded together; the inlet and the outlet are respectively located at the two ends of the plate body, and the two through holes are respectively located on the first raised surface and the second raised surface.

[0010] Further, the inlet, one of the two through holes, the outlet and the other of the two through holes are distributed along the length direction of the heat exchange plate; or, the inlet and one of the two through holes are distributed along the width direction of the heat exchange plate, and the outlet and the other of the two through holes are distributed along the width direction of the heat exchange plate.

[0011] Furthermore, the first liquid inlet pipe includes a plurality of pipe sections connected in sequence, one end of the pipe section is sealedly connected to the first flat tube, and the other end of the pipe section is sealedly connected to the second flat tube.

[0012] Furthermore, the pipe section includes a pipe body and a first ring body and a second ring body respectively arranged at two ends of the pipe body, the first ring body is welded to the outer wall of the first flat tube, and the second ring body is welded to the outer wall of the second flat tube.

[0013] Furthermore, the first liquid inlet pipe, the second liquid inlet pipe, the first liquid outlet pipe and the second liquid outlet pipe have the same structure.

[0014] By applying the technical solution of the present invention, a heat exchanger is provided. The heat exchanger includes a flat tube, and the flat tube has a refrigerant cavity, an inlet, an outlet, and two through holes, wherein the inlet and the outlet are respectively located at the two ends of the refrigerant cavity, and both the inlet and the outlet are connected to the refrigerant cavity; the two through holes are respectively located at the two ends of the refrigerant cavity, and both the through holes are not connected to the refrigerant cavity. With this solution, since the flat tube has an inlet, an outlet, and two through holes, when multiple flat tubes cooperate with the liquid collecting pipe (liquid inlet pipe or liquid outlet pipe) of the heat exchanger, different flat tubes can choose to use the inlet or outlet to connect with the liquid collecting pipe, and use the through holes to avoid the liquid collecting pipe, so that different components in the heat exchanger are easy to arrange and assemble to realize a dual process. Compared with the prior art, there is no need to set up complex isolation components and other structures, which simplifies the structure of the heat exchanger and facilitates manufacturing and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 The structure schematic diagram of the heat exchanger provided in the first embodiment of the present invention is shown;

[0017] Figure 2 Shows Figure 1 Exploded diagram of the heat exchanger in Figure 1;

[0018] Figure 3 Shows Figure 1 A partial enlarged view of the heat exchanger in FIG.

[0019] Figure 4 Shows Figure 1 A schematic diagram of the structure of the first flat tube in FIG.

[0020] Figure 5 Shows Figure 4 A partial enlarged view of the left end of the first flat tube;

[0021] Figure 6 Shows Figure 4 A partial enlarged view of the right end of the first flat tube in FIG.

[0022] Figure 7 The structure diagram of the heat exchanger provided in the second embodiment of the present invention is shown;

[0023] Figure 8 Shows Figure 7 Exploded diagram of the heat exchanger in Figure 1;

[0024] Fig. 9 Shows Figure 7 A cross-sectional view of the heat exchanger at position AA;

[0025] Fig.10 Shows Figure 7 A cross-sectional view of the heat exchanger at position BB;

[0026] Fig.11 Shows Figure 7 A schematic diagram of the structure of the first flat tube in FIG.

[0027] Fig.12 Shows Fig.11 A cross-sectional view of the left end of the first flat tube in FIG.

[0028] Fig.13 Shows Fig.11 A cross-sectional view of the right end of the first flat tube in FIG.

[0029] The above drawings include the following reference numerals:

[0030] 11. First liquid inlet pipe; 12. Second liquid inlet pipe; 13. First liquid outlet pipe; 14. Second liquid outlet pipe; 15. Pipe section; 20. First flat tube; 21. First inlet; 22. First outlet; 23. First through hole; 24. Second through hole; 25. Heat exchange plate; 26. Plate body; 27. Welding edge; 28. First raised surface; 29. ​​Second raised surface; 30. Second flat tube; 31. Second inlet; 32. Second outlet; 33. Third through hole; 34. Fourth through hole; 40. Fin. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below 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 of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] As shown in the accompanying drawings, a first embodiment of the present invention provides a heat exchanger, which includes a flat tube having a refrigerant cavity, an inlet, an outlet, and two through holes, wherein the inlet and the outlet are respectively located at the two ends of the refrigerant cavity, and both the inlet and the outlet are connected to the refrigerant cavity; the two through holes are respectively located at the two ends of the refrigerant cavity, and both the through holes are not connected to the refrigerant cavity. With this solution, since the flat tube has an inlet, an outlet, and two through holes, when multiple flat tubes are matched with the liquid collecting pipe (liquid inlet pipe or liquid outlet pipe) of the heat exchanger, different flat tubes can choose to use the inlet or outlet to connect with the liquid collecting pipe, and use the through holes to avoid the liquid collecting pipe, so that different components in the heat exchanger are easy to arrange and assemble to realize a dual process. Compared with the prior art, there is no need to set up complex isolation components and other structures, which simplifies the structure of the heat exchanger and facilitates manufacturing and assembly.

[0033] In this embodiment, there are a plurality of flat tubes, and the plurality of flat tubes include first flat tubes 20 and second flat tubes 30 arranged alternately. The heat exchanger further includes a first liquid inlet pipe 11, a second liquid inlet pipe 12, a first liquid outlet pipe 13, and a second liquid outlet pipe 14. The first inlet 21 of each first flat tube 20 is connected to the first liquid inlet pipe 11, the first outlet 22 of each first flat tube 20 is connected to the first liquid outlet pipe 13, the second inlet 31 of each second flat tube 30 is connected to the second liquid inlet pipe 12, and the second outlet 32 ​​of each second flat tube 30 is connected to the second liquid outlet pipe 14; the first flat tubes 2 0 are respectively the first through hole 23 and the second through hole 24, the two through holes of the second flat tube 30 are respectively the third through hole 33 and the fourth through hole 34, the first through hole 23 is arranged correspondingly to the second outlet 32, the second through hole 24 is arranged correspondingly to the second inlet 31, the third through hole 33 is arranged correspondingly to the first inlet 21, the fourth through hole 34 is arranged correspondingly to the first outlet 22, the first through hole 23 is connected to the second liquid outlet pipe 14, the second through hole 24 is connected to the second liquid inlet pipe 12, the third through hole 33 is connected to the first liquid inlet pipe 11, and the fourth through hole 34 is connected to the first liquid outlet pipe 13.

[0034] In this solution, the first inlet 21 of the first flat tube 20 is the inlet of the flat tube, and the first outlet 22 of the first flat tube 20 is the outlet of the flat tube. The second inlet 31 of the second flat tube 30 is the inlet of the flat tube, and the second outlet 32 ​​of the second flat tube 30 is the outlet of the flat tube. With this solution, a double flow can be realized by the cooperation of the first liquid inlet pipe 11, the second liquid inlet pipe 12, the first liquid outlet pipe 13, the second liquid outlet pipe 14 and the alternately arranged multiple first flat tubes 20 and multiple second flat tubes 30. Compared with the prior art, there is no need to set up complex isolation components and other structures, which simplifies the structure of the heat exchanger and facilitates manufacturing and assembly.

[0035] In this embodiment, a plurality of first flat tubes 20 and a plurality of second flat tubes 30 are arranged alternately, that is, there is a second flat tube 30 between two adjacent first flat tubes 20, and there is a first flat tube 20 between two adjacent second flat tubes 30. In this embodiment, fins 40 are arranged between adjacent first flat tubes 20 and second flat tubes 30, so that the heat exchange area can be increased. This solution enables the heat exchanger to have two processes, and each process can correspond to a compressor setting when in use. In this way, when one compressor is turned on and one process is turned off, the fin part of the heat exchanger can still achieve full contact and heat exchange with the other flow path, maximizing the use of the heat exchange area of ​​the heat exchanger, playing a role in rationally utilizing wind energy, electrical energy and other energies, improving heat exchange efficiency, and achieving the purpose of energy saving.

[0036] In this embodiment, the first flat tube 20 and the second flat tube 30 have the same structure, and the first flat tube 20 and the second flat tube 30 can be installed interchangeably. In this way, only one type of flat tube can be manufactured, which is conducive to reducing manufacturing costs and facilitating assembly. During assembly, the first flat tube 20 can be assembled to the position of the second flat tube 30 by rotating 180 degrees, or the second flat tube 30 can be assembled to the position of the first flat tube 20 by rotating 180 degrees.

[0037] In this embodiment, the first liquid inlet pipe 11 and the second liquid outlet pipe 14 are located at one end of the first flat tube 20, and the first liquid outlet pipe 13 and the second liquid inlet pipe 12 are located at the other end of the first flat tube 20. Through the above arrangement, the condensation in the two processes flows in the opposite direction, which is convenient for improving the heat exchange uniformity at different positions.

[0038] In this embodiment, the first liquid inlet pipe 11, the second liquid inlet pipe 12, the first liquid outlet pipe 13 and the second liquid outlet pipe 14 are arranged along the length direction of the first flat tube 20. In the second embodiment, the first liquid inlet pipe 11 and the second liquid outlet pipe 14 are distributed along the width direction of the first flat tube 20, and the first liquid outlet pipe 13 and the second liquid inlet pipe 12 are distributed along the width direction of the first flat tube 20. The above two arrangements are different and can achieve the same heat exchange effect.

[0039] In this embodiment, the flat tube (i.e., the first flat tube 20 or the second flat tube 30) includes two heat exchange plates 25 sealed and connected together, and the two heat exchange plates 25 are symmetrically arranged relative to a preset symmetric plane, which is convenient for processing. Optionally, the first flat tube 20 is stamped and formed into a heat exchange plate by a composite aluminum plate, and two heat exchange plates are mirror-imaged and overlapped to form the first flat tube 20, and then brazed to form a whole, which belongs to the category of stamped flat tubes. The second flat tube 30 can also be processed in this way.

[0040] In this embodiment, the heat exchange plate 25 includes a plate body 26, a welding edge 27 arranged at the periphery of the plate body 26, a first convex surface 28 and a second convex surface 29 arranged at intervals at both ends of the plate body 26, and the welding edge 27, the first convex surface 28 and the second convex surface 29 are all located on the same side of the plate body 26; the area between the plate bodies 26 of the two heat exchange plates 25 forms the refrigerant cavity of the first flat tube 20, the welding edges 27 of the two heat exchange plates 25 are welded together, the first convex surfaces 28 of the two heat exchange plates 25 are welded together, and the second convex surfaces 29 of the two heat exchange plates 25 are welded together; the first inlet 21 and the first outlet 22 are respectively located at both ends of the plate body 26, the first through hole 23 is located on the first convex surface 28, and the second through hole 24 is located on the second convex surface 29. In this way, it is convenient to process the inlet, outlet and each through hole, and it is avoided that the through hole is connected to the refrigerant cavity, thereby avoiding the connection between the two processes.

[0041] Taking the first flat tube 20 as an example, in the first embodiment, the first inlet 21, the first through hole 23, the first outlet 22 and the second through hole 24 are distributed along the length direction of the heat exchange plate 25. In the second embodiment, the first inlet 21 and the first through hole 23 are distributed along the width direction of the heat exchange plate 25, and the first outlet 22 and the second through hole 24 are distributed along the width direction of the heat exchange plate 25.

[0042] In the above embodiment, the first liquid inlet pipe 11 includes a plurality of pipe sections 15 connected in sequence, one end of the pipe section 15 is sealedly connected to the first flat tube 20, and the other end of the pipe section 15 is sealedly connected to the second flat tube 30. The above arrangement facilitates the connection between the first liquid inlet pipe 11 and the plurality of first flat tubes 20 and the plurality of second flat tubes 30.

[0043] Specifically, the pipe section 15 includes a pipe body and a first ring body and a second ring body respectively disposed at both ends of the pipe body, the first ring body is welded to the outer wall of the first flat tube 20, and the second ring body is welded to the outer wall of the second flat tube 30. The above arrangement facilitates welding and improves connection strength and sealing effect.

[0044] In this embodiment, the first liquid inlet pipe 11, the second liquid inlet pipe 12, the first liquid outlet pipe 13 and the second liquid outlet pipe 14 have the same structure, which can reduce the number of parts of the heat exchanger, facilitate processing and assembly, and thus reduce manufacturing costs.

[0045] By adopting the above scheme, the heat exchanger includes a first liquid inlet pipe 11, a second liquid inlet pipe 12, a first liquid outlet pipe 13, a second liquid outlet pipe 14, a first flat tube 20 and a second flat tube 30. The two ends of the first flat tube 20 respectively have a first inlet 21 and a first outlet 22 both connected to the refrigerant cavity in the first flat tube 20, and the two ends of the second flat tube 30 respectively have a second inlet 31 and a second outlet 32 ​​both connected to the refrigerant cavity in the second flat tube 30. There are multiple first flat tubes 20 and multiple second flat tubes 30, and the multiple first flat tubes 20 and the multiple second flat tubes 30 are alternately arranged. The first inlet 21 of each first flat tube 20 is connected to the first liquid inlet pipe 11, the first outlet 22 of each first flat tube 20 is connected to the first liquid outlet pipe 13, the second inlet 31 of each second flat tube 30 is connected to the second liquid inlet pipe 12, and the second outlet 32 ​​of each second flat tube 30 is connected to the second liquid outlet pipe 14. With this solution, a double flow can be realized by the cooperation of the first liquid inlet pipe 11, the second liquid inlet pipe 12, the first liquid outlet pipe 13, the second liquid outlet pipe 14 and the alternately arranged multiple first flat tubes 20 and multiple second flat tubes 30. Compared with the prior art, there is no need to set up a complex isolation component and other structures, which simplifies the structure of the heat exchanger and facilitates manufacturing and assembly. In addition, the first flat tube 20 and the second flat tube 30 can be interchanged, which is convenient for processing and assembly.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat exchanger, characterized in that: The flat tube comprises a refrigerant cavity, an inlet, an outlet and two through holes, wherein the inlet and the outlet are respectively located at two ends of the refrigerant cavity, and the inlet and the outlet are both connected to the refrigerant cavity; the two through holes are respectively located at two ends of the refrigerant cavity, and the two through holes are not connected to the refrigerant cavity; There are a plurality of flat tubes, the plurality of flat tubes comprising first flat tubes (20) and second flat tubes (30) arranged alternately, the heat exchanger further comprising a first liquid inlet pipe (11), a second liquid inlet pipe (12), a first liquid outlet pipe (13), and a second liquid outlet pipe (14), the first inlet (21) of each first flat tube (20) being in communication with the first liquid inlet pipe (11), the first outlet (22) of each first flat tube (20) being in communication with the first liquid outlet pipe (13), the second inlet (31) of each second flat tube (30) being in communication with the second liquid inlet pipe (12), and the second outlet (32) of each second flat tube (30) being in communication with the second liquid outlet pipe (14); The two through holes of the first flat tube (20) are respectively a first through hole (23) and a second through hole (24); the two through holes of the second flat tube (30) are respectively a third through hole (33) and a fourth through hole (34); the first through hole (23) is arranged correspondingly to the second outlet (32); the second through hole (24) is arranged correspondingly to the second inlet (31); the third through hole (33) is arranged correspondingly to the first inlet (21); the fourth through hole (34) is arranged correspondingly to the first outlet (22); the first through hole (23) is in communication with the second liquid outlet pipe (14); the second through hole (24) is in communication with the second liquid inlet pipe (12); the third through hole (33) is in communication with the first liquid inlet pipe (11); and the fourth through hole (34) is in communication with the first liquid outlet pipe (13); The first liquid inlet pipe (11) comprises a plurality of pipe sections (15) connected in sequence, one end of the pipe section (15) is sealedly connected to the first flat tube (20), and the other end of the pipe section (15) is sealedly connected to the second flat tube (30); The flat tube comprises two heat exchange plates (25) which are sealed and connected together, and the two heat exchange plates (25) are symmetrically arranged relative to a preset symmetry plane.

2. The heat exchanger according to claim 1, characterized in that: The first liquid inlet pipe (11) and the second liquid outlet pipe (14) are located at one end of the first flat tube (20), and the first liquid outlet pipe (13) and the second liquid inlet pipe (12) are located at the other end of the first flat tube (20).

3. The heat exchanger according to claim 1, characterized in that: The first liquid inlet pipe (11), the second liquid inlet pipe (12), the first liquid outlet pipe (13) and the second liquid outlet pipe (14) are arranged in an arranged manner along the length direction of the first flat tube (20); or, The first liquid inlet pipe (11) and the second liquid outlet pipe (14) are distributed along the width direction of the first flat tube (20), and the first liquid outlet pipe (13) and the second liquid inlet pipe (12) are distributed along the width direction of the first flat tube (20).

4. The heat exchanger according to claim 1, characterized in that: The heat exchange plate (25) comprises a plate body (26), a welding edge (27) arranged at the periphery of the plate body (26), a first raised surface (28) and a second raised surface (29) arranged at intervals at both ends of the plate body (26), the welding edge (27), the first raised surface (28) and the second raised surface (29) are all located on the same side of the plate body (26); the area between the plate bodies (26) of the two heat exchange plates (25) forms the refrigerant cavity, the welding edges (27) of the two heat exchange plates (25) are welded together, the first raised surfaces (28) of the two heat exchange plates (25) are welded together, and the second raised surfaces (29) of the two heat exchange plates (25) are welded together; the inlet and the outlet are respectively located at the two ends of the plate body (26), and the two through holes are respectively located on the first raised surface (28) and the second raised surface (29).

5. The heat exchanger according to claim 4, characterized in that: The inlet, one of the two through holes, the outlet and the other of the two through holes are distributed along the length direction of the heat exchange plate (25); or, The inlet and one of the two through holes are distributed along the width direction of the heat exchange plate (25), and the outlet and the other of the two through holes are distributed along the width direction of the heat exchange plate (25).

6. The heat exchanger according to claim 1, characterized in that The pipe section (15) comprises a pipe body and a first ring body and a second ring body respectively arranged at two ends of the pipe body, the first ring body being welded to the outer wall of the first flat tube (20), and the second ring body being welded to the outer wall of the second flat tube (30).

7. The heat exchanger according to claim 1, characterized in that The first liquid inlet pipe (11), the second liquid inlet pipe (12), the first liquid outlet pipe (13) and the second liquid outlet pipe (14) have the same structure.

Images