CN113310340A

CN113310340A - Heat exchanger

Info

Publication number: CN113310340A
Application number: CN202010125842.5A
Authority: CN
Inventors: 魏文建; 马文勇
Original assignee: Zhejiang Dunan Thermal Technology Co Ltd
Current assignee: Zhejiang Dunan Thermal Technology Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2021-08-27
Also published as: WO2021169532A1; US20230003463A1; JP2023516888A

Abstract

The invention provides a heat exchanger which comprises a flat pipe, wherein the flat pipe is provided with a refrigerant cavity, an inlet, an outlet and two through holes, the inlet and the outlet are respectively positioned at two ends of the refrigerant cavity, and the inlet and the outlet are communicated with the refrigerant cavity; the two through holes are respectively positioned at two ends of the refrigerant cavity and are not communicated with the refrigerant cavity. By adopting the scheme, because the flat pipes are provided with the inlets, the outlets and the two through holes, when the flat pipes are matched with the liquid collecting pipes (the liquid inlet pipes or the liquid outlet pipes) of the heat exchanger, the different flat pipes can be selected to use the inlets or the outlets to be communicated with the liquid collecting pipes and use the through holes to avoid the liquid collecting pipes, so that different parts in the heat exchanger are convenient to arrange and assemble, and double flows are realized. Compared with the prior art, the structure of the heat exchanger is simplified without arranging complicated structures such as isolation components and the like, and the heat exchanger is convenient to manufacture and assemble.

Description

Heat exchanger

Technical Field

The invention relates to the technical field of heat exchangers, in particular to a heat exchanger.

Background

The prior art discloses a microchannel heat exchanger for two compressors, the heat exchanger includes flat nest of tubes and collecting main, flat nest of tubes is arranged side by side along the axial of collecting main, the collecting main is including establishing the first collecting main at flat nest of tubes left end and establishing the second collecting main at flat nest of tubes right-hand member, be equipped with the isolation subassembly that falls into the inner chamber of collecting main upper part inner chamber and lower part inner chamber in the collecting main, count from the front end of collecting main backward, the left end of odd number flat nest of tubes and the upper portion inner chamber intercommunication of first collecting main, the right-hand member communicates with the lower part inner chamber of second collecting main, the left end of even number flat nest of tubes and the lower part inner chamber intercommunication of first collecting main, the right-hand member communicates with the upper portion inner chamber of second collecting main. According to the scheme, when one compressor is started, the fin part of the heat exchanger can still be in complete contact with another flow path for heat exchange, the heat exchange area of the heat exchanger is utilized to the maximum extent, energy such as wind energy and electric energy is utilized reasonably, the heat exchange efficiency is improved, and the purpose of saving energy is achieved. However, the heat exchanger has the problems that due to the limitation of structures such as flat pipes, complex structures such as isolation components are required to be arranged for realizing double flows, the structure is complex, and the manufacture and assembly are inconvenient.

Disclosure of Invention

The invention provides a heat exchanger, which aims to solve the problems that a double-flow-path heat exchanger in the prior art is complex in structure and inconvenient to manufacture and assemble.

In order to solve the problems, the invention provides a heat exchanger which comprises a flat pipe, wherein the flat pipe is provided with a refrigerant cavity, an inlet, an outlet and two through holes, the inlet and the outlet are respectively positioned at two ends of the refrigerant cavity, and the inlet and the outlet are both communicated with the refrigerant cavity; the two through holes are respectively positioned at two ends of the refrigerant cavity, and the two through holes are not communicated with the refrigerant cavity.

Furthermore, the number of the flat tubes is multiple, the plurality of flat tubes comprise first flat tubes and second flat tubes which are arranged alternately, the heat exchanger further comprises a first liquid inlet pipe, a second liquid inlet pipe, a first liquid outlet pipe and a second liquid outlet pipe, a first inlet of each first flat tube is communicated with the first liquid inlet pipe, a first outlet of each first flat tube is communicated with the first liquid outlet pipe, a second inlet of each second flat tube is communicated with the second liquid inlet pipe, and a second outlet of each second flat tube is communicated with the second liquid outlet pipe; two through-holes of first flat pipe are first through-hole and second through-hole respectively, two through-holes of the flat pipe of second are third through-hole and fourth through-hole respectively, first through-hole with the second export corresponds the setting, the second through-hole with the second import corresponds the setting, the third through-hole with first import corresponds the setting, the fourth through-hole with first export corresponds the setting, first through-hole with second drain pipe intercommunication, the second through-hole with second drain pipe intercommunication, the third through-hole with first drain pipe intercommunication, the fourth through-hole with first drain pipe intercommunication.

Further, the first liquid inlet pipe and the second liquid outlet pipe are located at one end of the first flat pipe, and the first liquid outlet pipe and the second liquid inlet pipe are located at the other end of the first flat pipe.

Furthermore, 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 pipe; or, the first liquid inlet pipe and the second liquid outlet pipe are distributed along the width direction of the first flat pipe, and the first liquid outlet pipe and the second liquid inlet pipe are distributed along the width direction of the first flat pipe.

Furthermore, the flat pipe comprises two heat exchange plates which are connected together in a sealing mode, and the two heat exchange plates are symmetrically arranged relative to a preset symmetrical plane.

Furthermore, the heat exchange plate comprises a plate body, a welding edge arranged on the periphery of the plate body, and a first convex surface and a second convex surface which are arranged at two ends of the plate body at intervals, wherein the welding edge, the first convex surface and the second convex surface are all positioned on the same side of the plate body; the refrigerant cavity is formed in the area between the plate bodies of the two heat exchange plates, the welding edges of the two heat exchange plates are welded together, the first convex surfaces of the two heat exchange plates are welded together, and the second convex surfaces of the two heat exchange plates are welded together; the inlet and the outlet are respectively positioned at two ends of the plate body, and the two through holes are respectively positioned on the first convex surface and the second convex surface.

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.

Further, the first liquid inlet pipe comprises a plurality of pipe sections which are sequentially communicated, one end of each pipe section is in sealing connection with the first flat pipe, and the other end of each pipe section is in sealing connection with the second flat pipe.

Further, the pipeline section comprises a pipe body, and a first ring body and a second ring body which are arranged at two ends of the pipe body respectively, the first ring body is welded with the outer wall of the first flat pipe, and the second ring body is welded with the outer wall of the second flat pipe.

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.

The heat exchanger comprises a flat pipe, wherein the flat pipe is provided with a refrigerant cavity, an inlet, an outlet and two through holes, the inlet and the outlet are respectively positioned at two ends of the refrigerant cavity, and the inlet and the outlet are both communicated with the refrigerant cavity; the two through holes are respectively positioned at two ends of the refrigerant cavity and are not communicated with the refrigerant cavity. By adopting the scheme, because the flat pipes are provided with the inlets, the outlets and the two through holes, when the flat pipes are matched with the liquid collecting pipes (the liquid inlet pipes or the liquid outlet pipes) of the heat exchanger, the different flat pipes can be selected to use the inlets or the outlets to be communicated with the liquid collecting pipes and use the through holes to avoid the liquid collecting pipes, so that different parts in the heat exchanger are convenient to arrange and assemble, and double flows are realized. Compared with the prior art, the structure of the heat exchanger is simplified without arranging complicated structures such as isolation components and the like, and the heat exchanger is convenient to manufacture and assemble.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a heat exchanger provided in a first embodiment of the invention;

FIG. 2 shows an exploded view of the heat exchanger of FIG. 1;

FIG. 3 shows an enlarged view of a portion of the heat exchanger of FIG. 1;

fig. 4 shows a schematic structural view of the first flat tube in fig. 1;

FIG. 5 shows an enlarged partial view of the left end of the first flat tube of FIG. 4;

FIG. 6 shows a close-up view of the right end of the first flat tube of FIG. 4;

FIG. 7 is a schematic structural diagram of a heat exchanger provided in the second embodiment of the present invention;

FIG. 8 shows an exploded view of the heat exchanger of FIG. 7;

FIG. 9 shows a cross-sectional view of the heat exchanger of FIG. 7 at position A-A;

FIG. 10 shows a cross-sectional view of the heat exchanger of FIG. 7 at position B-B;

fig. 11 shows a schematic structural view of the first flat tube in fig. 7;

FIG. 12 shows a cross-sectional view of the left end of the first flat tube of FIG. 11;

fig. 13 shows a sectional view of the right end of the first flat tube in fig. 11.

Wherein the figures include the following reference numerals:

11. a first liquid inlet pipe; 12. a second liquid inlet pipe; 13. a first liquid outlet pipe; 14. a second liquid outlet pipe; 15. a pipe section; 20. a first flat tube; 21. a first inlet; 22. a first outlet; 23. a first through hole; 24. a second through hole; 25. a heat exchange plate; 26. a plate body; 27. welding edges; 28. a first convex surface; 29. a second convex surface; 30. a second flat tube; 31. a second inlet; 32. a second outlet; 33. a third through hole; 34. a fourth via hole; 40. and a fin.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in the accompanying drawings, a first embodiment of the present invention provides a heat exchanger, which includes a flat tube, 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 communicated with the refrigerant cavity; the two through holes are respectively positioned at two ends of the refrigerant cavity and are not communicated with the refrigerant cavity. By adopting the scheme, because the flat pipes are provided with the inlets, the outlets and the two through holes, when the flat pipes are matched with the liquid collecting pipes (the liquid inlet pipes or the liquid outlet pipes) of the heat exchanger, the different flat pipes can be selected to use the inlets or the outlets to be communicated with the liquid collecting pipes and use the through holes to avoid the liquid collecting pipes, so that different parts in the heat exchanger are convenient to arrange and assemble, and double flows are realized. Compared with the prior art, the structure of the heat exchanger is simplified without arranging complicated structures such as isolation components and the like, and the heat exchanger is convenient to manufacture and assemble.

In this embodiment, the flat tubes are multiple, the multiple flat tubes include first flat tubes 20 and second flat tubes 30 which are arranged alternately, the heat exchanger further includes a first liquid inlet tube 11, a second liquid inlet tube 12, a first liquid outlet tube 13 and a second liquid outlet tube 14, a first inlet 21 of each first flat tube 20 is communicated with the first liquid inlet tube 11, a first outlet 22 of each first flat tube 20 is communicated with the first liquid outlet tube 13, a second inlet 31 of each second flat tube 30 is communicated with the second liquid inlet tube 12, and a second outlet 32 of each second flat tube 30 is communicated with the second liquid outlet tube 14; two through-holes of first flat pipe 20 are first through-hole 23 and second through-hole 24 respectively, two through-holes of the flat pipe 30 of second are third through-hole 33 and fourth through-hole 34 respectively, first through-hole 23 corresponds the setting with second export 32, second through-hole 24 corresponds the setting with second import 31, third through-hole 33 corresponds the setting with first import 21, fourth through-hole 34 corresponds the setting with first export 22, first through-hole 23 and second drain pipe 14 intercommunication, second through-hole 24 and second feed liquor pipe 12 intercommunication, third through-hole 33 and first feed liquor pipe 11 intercommunication, fourth through-hole 34 and first drain pipe 13 intercommunication.

In this embodiment, the first inlet 21 of the first flat tube 20 is an inlet of the above flat tube, and the first outlet 22 of the first flat tube 20 is an outlet of the above flat tube. The second inlet 31 of the second flat tube 30 is an inlet of the flat tube, and the second outlet 32 of the second flat tube 30 is an outlet of the flat tube. By adopting the scheme, double processes can be realized by matching 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 plurality of first flat pipes 20 and the plurality of second flat pipes 30 which are alternately arranged. Compared with the prior art, the structure of the heat exchanger is simplified without arranging complicated structures such as isolation components and the like, and the heat exchanger is convenient to manufacture and assemble.

In this embodiment, a plurality of first flat tubes 20 and a plurality of second flat tubes 30 are arranged in an alternating manner, that is, one second flat tube 30 is provided between two adjacent first flat tubes 20, and one first flat tube 20 is provided between two adjacent second flat tubes 30. In this embodiment, a fin 40 is disposed between the adjacent first flat tube 20 and the second flat tube 30, so that the heat exchange area can be increased. This scheme makes the heat exchanger have two flows, and every flow can correspond a compressor setting when using, and when opening a compressor like this, closes a flow, and the fin part of heat exchanger still can realize contacting completely and the heat transfer with another flow path, and furthest utilizes the heat transfer area of heat exchanger, plays energy such as rationally utilizing wind energy, electric energy, improves heat exchange efficiency, reaches energy-conserving purpose.

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 interchangeably mounted. Therefore, the flat pipe is manufactured, so that the manufacturing cost is reduced, and the assembly is convenient. During assembly, the first flat tube 20 can be assembled to the second flat tube 30 by rotating 180 degrees, or the second flat tube 30 can be assembled to the first flat tube 20 by rotating 180 degrees.

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 pipe 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 pipe 20. Through the arrangement, the condensation in the two flows reversely flows, and the heat exchange uniformity at different positions is improved conveniently.

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 pipe 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 pipe 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 pipe 20. The two arrangement modes are different, and the same heat exchange effect can be achieved.

In the present embodiment, the flat tube (i.e. the first flat tube 20 or the second flat tube 30) includes two heat exchange plates 25 hermetically connected together, and the two heat exchange plates 25 are symmetrically arranged with respect to a preset symmetrical plane, so that the flat tube is convenient to process. Optionally, first flat pipe 20 is the heat transfer board by composite aluminum plate stamping forming, and two heat transfer board mirror image coincide form first flat pipe 20, then become as an organic whole after brazing, belong to the flat pipe category of stamping forming. The second flat tube 30 can also be manufactured in this way.

In the present embodiment, the heat exchange plate 25 includes a plate body 26, a welding edge 27 disposed on the periphery of the plate body 26, and a first convex surface 28 and a second convex surface 29 disposed at two ends of the plate body 26 at intervals, where 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 a 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 at the first convex surface 28, and the second through hole 24 is located at the second convex surface 29. The inlet, the outlet and the through holes are convenient to process, and the through holes are prevented from being communicated with the refrigerant cavity, so that two processes are prevented from being communicated.

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 exchanger plate 25, and the first outlet 22 and the second through hole 24 are distributed along the width direction of the heat exchanger plate 25.

In the above embodiment, the first liquid inlet pipe 11 includes a plurality of pipe segments 15 that are sequentially communicated, one end of each pipe segment 15 is hermetically connected to the first flat pipe 20, and the other end of each pipe segment 15 is hermetically connected to the second flat pipe 30. Through the above arrangement, the connection of the first liquid inlet pipe 11 and the first flat pipes 20 and the second flat pipes 30 is convenient to realize.

Specifically, the pipe section 15 includes the body and sets up first ring body and the second ring body at the both ends of body respectively, and first ring body welds with the outer wall of first flat pipe 20, and the outer wall welding of second ring body and the flat pipe 30 of second. Welding is convenient to carry out through above-mentioned setting, improves joint strength and sealed effect.

In this embodiment, the first inlet pipe 11, the second inlet pipe 12, the first outlet pipe 13 and the second outlet pipe 14 have the same structure. Therefore, the number of parts of the heat exchanger can be reduced, and the heat exchanger is convenient to process and assemble, so that the manufacturing cost is reduced.

By adopting the scheme, the heat exchanger comprises a first liquid inlet pipe 11, a second liquid inlet pipe 12 and a first liquid outlet pipe 13, second drain pipe 14, first flat pipe 20 and the flat pipe 30 of second, the both ends of first flat pipe 20 have first import 21 and the first export 22 all with the refrigerant chamber intercommunication in the first flat pipe 20 respectively, the both ends of the flat pipe 30 of second have second import 31 and the second export 32 all with the refrigerant chamber intercommunication in the flat pipe 30 of second respectively, first flat pipe 20 and the flat pipe 30 of second are a plurality ofly, a plurality of flat pipe 20 of first and a plurality of flat pipe 30 of second alternate arrangement set up, the first import 21 of every flat pipe 20 of first all communicates with first feed liquor pipe 11, the first export 22 of every flat pipe 20 of first all communicates with first drain pipe 13, the second import 31 of every flat pipe 30 of second all communicates with second feed liquor pipe 12, the second export 32 of every flat pipe 30 of second all communicates with second drain pipe 14. By adopting the scheme, double processes can be realized by matching 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 plurality of first flat pipes 20 and the plurality of second flat pipes 30 which are alternately arranged. Compared with the prior art, the structure of the heat exchanger is simplified without arranging complicated structures such as isolation components and the like, and the heat exchanger is convenient to manufacture and assemble. And the first flat tube 20 and the second flat tube 30 can be interchanged, which is convenient for processing and assembling.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat exchanger is characterized by comprising a flat pipe, wherein the flat pipe is provided with a refrigerant cavity, an inlet, an outlet and two through holes, the inlet and the outlet are respectively positioned at two ends of the refrigerant cavity, and the inlet and the outlet are both communicated with the refrigerant cavity; the two through holes are respectively positioned at two ends of the refrigerant cavity, and the two through holes are not communicated with the refrigerant cavity.

2. The heat exchanger of claim 1,

the heat exchanger comprises a plurality of flat pipes, wherein the flat pipes comprise first flat pipes (20) and second flat pipes (30) which are arranged in an alternating mode, the heat exchanger further comprises 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), a first inlet (21) of each first flat pipe (20) is communicated with the first liquid inlet pipe (11), a first outlet (22) of each first flat pipe (20) is communicated with the first liquid outlet pipe (13), a second inlet (31) of each second flat pipe (30) is communicated with the second liquid inlet pipe (12), and a second outlet (32) of each second flat pipe (30) is communicated with the second liquid outlet pipe (14);

two through-holes of first flat pipe (20) are first through-hole (23) and second through-hole (24) respectively, two through-holes of the flat pipe of second (30) are third through-hole (33) and fourth through-hole (34) respectively, first through-hole (23) with second export (32) correspond the setting, second through-hole (24) with second import (31) correspond the setting, third through-hole (33) with first import (21) correspond the setting, fourth through-hole (34) with first export (22) correspond the setting, first through-hole (23) with second drain pipe (14) intercommunication, second through-hole (24) with second liquid inlet pipe (12) intercommunication, third through-hole (33) with first liquid inlet pipe (11) intercommunication, fourth through-hole (34) with first drain pipe (13) intercommunication.

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

4. The heat exchanger of claim 2,

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 pipe (20); or the like, or, alternatively,

first feed liquor pipe (11) with second drain pipe (14) are followed the width direction of first flat pipe (20) distributes, first drain pipe (13) with second feed liquor pipe (12) are followed the width direction of first flat pipe (20) distributes.

5. A heat exchanger according to claim 1, characterised in that the flat tubes comprise two heat exchanger plates (25) sealingly joined together, the two heat exchanger plates (25) being arranged symmetrically with respect to a predetermined plane of symmetry.

6. The heat exchanger according to claim 5, wherein the heat exchanger plate (25) comprises a plate body (26), a weld edge (27) arranged at the periphery of the plate body (26), and a first raised surface (28) and a second raised surface (29) arranged at two ends of the plate body (26) at intervals, wherein the weld 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 refrigerant cavity is formed in the area between the plate bodies (26) of the two heat exchange plates (25), 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 inlet and the outlet are respectively positioned at two ends of the plate body (26), and the two through holes are respectively positioned on the first convex surface (28) and the second convex surface (29).

7. The heat exchanger of claim 6,

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 like, or, alternatively,

one of the inlet and the two through holes is distributed along the width direction of the heat exchange plate (25), and the other of the outlet and the two through holes is distributed along the width direction of the heat exchange plate (25).

8. The heat exchanger according to claim 2, characterized in that the first liquid inlet pipe (11) comprises a plurality of pipe sections (15) which are communicated in sequence, one end of each pipe section (15) is hermetically connected with the first flat pipe (20), and the other end of each pipe section (15) is hermetically connected with the second flat pipe (30).

9. The heat exchanger according to claim 8, characterized in that the tube section (15) comprises a tube body and a first ring body and a second ring body respectively arranged at two ends of the tube body, the first ring body is welded with the outer wall of the first flat tube (20), and the second ring body is welded with the outer wall of the second flat tube (30).

10. Heat exchanger according to claim 8, wherein the first inlet pipe (11), the second inlet pipe (12), the first outlet pipe (13) and the second outlet pipe (14) are structurally identical.