CN107036476A - Heat exchanger tube, heat exchanger and the method for manufacturing heat exchanger - Google Patents

Abstract

The embodiment of the invention discloses a heat exchange tube, a heat exchanger and a method for manufacturing the heat exchanger. The heat exchange tube includes: a main body having a tubular shape and two circumferentially opposite edge portions when viewed in an installed state, the main body includes: a plurality of sub-heat exchange tubes, and a connecting tube connecting adjacent sub-heat exchange tubes connectors. Thus, for example, the connection between the fins and the heat exchange tubes can be improved, and the surface of the heat exchange tubes can be sprayed with zinc or sprayed on the surface.

Description

Heat exchange tube, heat exchanger and method for manufacturing heat exchanger

technical field

Embodiments of the present invention relate to a heat exchange tube, a heat exchanger and a method for manufacturing the heat exchanger.

Background technique

A conventional heat exchanger includes fins having fin holes into which heat exchange tubes are inserted. Fins and heat exchange tubes are connected by expansion joints.

Contents of the invention

An object of embodiments of the present invention is to provide a heat exchange, a heat exchanger and a method of manufacturing a heat exchanger whereby, for example, connection of fins and heat exchange tubes is improved.

Another object of the embodiments of the present invention is to provide a heat exchange tube, a heat exchanger and a method of manufacturing the heat exchanger, thereby, for example, facilitating zinc spraying or surface spraying of the heat exchange tube.

An embodiment of the present invention provides a heat exchange tube comprising: a main body having a tubular shape and two circumferentially opposite edge portions when viewed in an installed state, the main body comprising: a plurality of heat exchange tubes, and connectors connecting adjacent sub-heat exchange tubes.

According to an embodiment of the present invention, when viewed in an installed state, the plurality of sub-heat exchange tubes have substantially arc-shaped outer surfaces.

According to an embodiment of the present invention, at least one of the plurality of sub-heat exchange tubes has one hole or a plurality of holes arranged along the circumferential direction of the heat exchange tube.

According to an embodiment of the present invention, the connecting member is deformable so that the heat exchange tubes can be expanded and closed.

According to an embodiment of the present invention, the heat exchange tube has a substantially partial ring shape or a C-shape in cross-section when viewed in an installed state.

According to an embodiment of the invention, the connecting element is a sheet-like element.

According to an embodiment of the present invention, when viewed in an installed state, the connection piece is arranged at the outer periphery of the heat exchange tube.

According to an embodiment of the present invention, when viewed in an installed state, the connection piece is arranged at the inner periphery of the heat exchange tube.

According to an embodiment of the present invention, when viewed in an installed state, the connection piece is arranged between the inner periphery and the outer periphery of the heat exchange tube.

According to an embodiment of the present invention, the connection piece is continuous in the axial direction of the heat exchange tube, or is a plurality of spaced connection pieces arranged in the axial direction of the heat exchange tube.

According to an embodiment of the present invention, when viewed in an unfolded state, the plurality of sub-heat exchange tubes are arranged in a row in cross section.

An embodiment of the present invention provides a heat exchanger, which includes: fins, the fins have fin holes; and the above-mentioned heat exchange tubes, the heat exchange tubes are inserted into the fins of the fins in the hole.

According to an embodiment of the present invention, the heat exchanger further includes: an insert, at least a part of which is inserted into a central hole formed by the main body or between two circumferentially opposite edge portions of the main body.

An embodiment of the present invention provides a method for manufacturing a heat exchanger, the method comprising: providing fins with fin holes; providing the above-mentioned heat exchange tubes; when the heat exchange tubes are in a closed state inserting the heat exchange tubes into the fin holes of the fins; and expanding the heat exchange tubes into the fin holes of the fins.

According to an embodiment of the present invention, the step of expanding the heat exchange tubes in the fin holes of the fins includes: providing an insert; and inserting at least a part of the insert into the central hole formed by the main body or the main body Between two circumferentially opposite edge portions of .

According to an embodiment of the present invention, the method further includes: before inserting the heat exchange tube into the fin hole of the fin, spraying the heat exchange tube when the heat exchange tube is in an unfolded state .

According to the heat exchange tube, the heat exchanger and the method for manufacturing the heat exchanger according to the embodiments of the present invention, for example, the connection between the fin and the heat exchange tube can be improved, and the surface of the heat exchange tube can be sprayed with zinc or sprayed on the surface.

Description of drawings

Fig. 1 is a schematic front view of a heat exchange tube of an example heat exchanger in an unfolded state according to an embodiment of the present invention;

Fig. 2 is a schematic perspective view of a heat exchange tube of an example heat exchanger in an unfolded state according to an embodiment of the present invention;

Fig. 3 is a schematic front view of a heat exchange tube of another example of a heat exchanger in an unfolded state according to an embodiment of the present invention;

Fig. 4 is a schematic perspective view of a heat exchange tube of another example of a heat exchanger in an unfolded state according to an embodiment of the present invention;

Fig. 5 is a schematic front view of a heat exchange tube of a heat exchanger according to yet another example of an embodiment of the present invention in an unfolded state;

Fig. 6 is a schematic perspective view of a heat exchange tube of a heat exchanger according to yet another example of an embodiment of the present invention in an unfolded state;

Fig. 7 is a schematic perspective view of a heat exchange tube of another example of a heat exchanger in an unfolded state according to an embodiment of the present invention;

Fig. 8 is a schematic perspective view of a heat exchange tube of a heat exchanger in an unfolded state according to a further example of an embodiment of the present invention;

Fig. 9 is a schematic perspective view of the heat exchange tubes of the heat exchanger in a partially closed state according to an embodiment of the present invention;

Fig. 10 is a schematic perspective view of the heat exchange tubes of the heat exchanger in a closed state according to an embodiment of the present invention;

Fig. 11 is a schematic partial front view of the heat exchanger according to an embodiment of the present invention when the heat exchange tubes are in a closed state;

Fig. 12 is a schematic partial perspective view of the heat exchanger according to an embodiment of the present invention when the heat exchange tubes are in a closed state;

Fig. 13 is another schematic partial perspective view of the heat exchanger according to the embodiment of the present invention when the heat exchange tubes are in a closed state;

14 is a schematic partial front view of a heat exchanger according to an embodiment of the present invention in a state where an insert is inserted into a heat exchange tube;

15 is a schematic partial perspective view of a heat exchanger according to an embodiment of the present invention in a state where an insert is inserted into a heat exchange tube;

Fig. 16 is another schematic partial perspective view of the heat exchanger according to the embodiment of the present invention in the state where an insert is inserted into the heat exchange tube;

17 is a schematic partial front view of a heat exchanger according to an embodiment of the present invention in a state where another insert is inserted into the heat exchange tube;

18 is a schematic partial perspective view of the heat exchanger according to an embodiment of the present invention in a state where another insert is inserted into the heat exchange tube; and

Fig. 19 is another schematic partial perspective view of the heat exchanger according to the embodiment of the present invention in a state where another insert is inserted into the heat exchange tube.

detailed description

1 to 19, a heat exchanger 100 according to an embodiment of the present invention includes: a fin 1 having a fin hole 11; and a heat exchange tube 2 inserted into the fin In the fin hole 11 of sheet 1.

Referring to FIGS. 1 to 19 , especially FIGS. 1 to 10 , the heat exchange tube 2 according to the embodiment of the present invention includes: a main body 20 having a tubular shape and having two circumferentially opposite The edge part 21 , the main body 20 includes: a plurality of sub-heat exchange tubes 22 , and a connecting piece 29 connecting adjacent sub-heat exchange tubes 22 . The heat exchange tube 2 may be integrally formed. The sub heat exchange tubes 22 are the main heat exchange components.

Referring to FIGS. 1 to 19 , according to some embodiments of the present invention, when viewed in an installed state, the plurality of sub-heat exchange tubes 22 have substantially arc-shaped outer surfaces. This cooperates with the fin holes 11 . In addition, the inner surface of the fin hole 11 may have a shape complementary to the outer surface of the plurality of sub heat exchange tubes 22 . The plurality of sub-heat exchange tubes 22 may have outer surfaces of any suitable shape. As shown in FIGS. 1 to 10 , at least one of the plurality of sub-heat exchange tubes 22 may have one hole or channel 23 or a plurality of holes or channels 23 arranged along the circumferential direction of the heat exchange tube 2 . Thereby, the heat exchange medium can flow. The number of sub heat exchange tubes 22 may be 2, 3, 4, 5, 6 or more. The sub-heat exchange tubes 22 may have the same structure or different structures, and may be equal or different in size.

As shown in FIGS. 1 to 10 , according to some embodiments of the present invention, the connecting member 29 is deformable so that the heat exchange tubes 2 can be expanded and closed. In FIGS. 1 to 7 , the heat exchange tube 2 is in an unfolded state. In FIG. 9 , the heat exchange tube 2 is in a partially closed state. In FIG. 10 , the heat exchange tube 2 is in a closed state. The connecting piece 29 may be a sheet piece. In the embodiments shown in FIGS. 1 to 4 and 7 to 19 , the connection piece 29 is arranged at the outer periphery of the heat exchange tube 2 when viewed in an installed state. According to another embodiment of the present invention, the connection piece 29 may be arranged at the inner periphery of the heat exchange tube 2 when viewed in an installed state. In the embodiment shown in FIGS. 5 and 6 , the connecting piece 29 is arranged between the inner periphery and the outer periphery of the heat exchange tube 2 when viewed in an installed state. The connecting piece 29 may be continuous in the axial direction of the heat exchange tube 2, or as shown in FIG. Connector 29.

Referring to FIGS. 1 to 19, according to some embodiments of the present invention, when viewed in an installed state, in cross section, the heat exchange tube 2 has a substantially part-annular shape or a C-shape, for example, a substantially part-annular shape. Shape, that is, the shape of the part of the ring corresponding to a central angle smaller than 360 degrees. The inner peripheral surface and the outer peripheral surface of the heat exchange tube 2 may be generally arc-shaped or non-arc-shaped.

The processed heat exchange tubes are usually in an unfolded state. Referring to Figures 1 to 8, the two sides (inner peripheral surface and outer peripheral surface) of the heat exchange tube are sprayed with zinc or surface sprayed. After the surface spraying treatment, the heat exchange tubes can be closed, and the heat exchange tubes after the close treatment are approximately C-shaped structures, which are suitable for inserting into the fin holes 11 of the fins 1, and are conducive to expansion joints, so as to realize Expansion joints between heat exchange tubes and fins. For example, the opened heat exchange tubes can be closed by external force. The two circumferentially opposite edge portions 21 of the closed heat exchange tubes are almost stuck together. In Fig. 9, the heat exchange tubes have been partially closed, and in Fig. 10, the heat exchange tubes have been closed. In addition, the size of the opening after closing, that is, the gap between two circumferentially opposite edge portions 21 can also be set according to needs. For the heat exchange tubes 2 having more than three sub-heat exchange tubes 22, the closing method and closing effect are the same as those of the ring heat pipe described above.

14 to 19, according to an embodiment of the present invention, the heat exchanger 100 further includes: an insert 3, at least a part of which is inserted into a central hole formed by the main body 20 or two circumferentially opposite sides of the main body 20 Between the edge portion 21.

Referring to FIGS. 14 to 16 , according to an embodiment of the present invention, the insert 30 may be an insert with a substantially circular cross-section, and is inserted into a central hole formed in the main body 20 .

According to an embodiment of the present invention, the above-mentioned insert 30 may not be used, so that the parts of the main body 20 close to the two circumferentially opposite edge portions 21 overlap, and/or the adjacent two of the plurality of sub-heat exchange tubes 22 One or more are recessed to the inner side of the main body in the ring structure, and after being inserted into the fin hole 11 of the fin 1, the heat exchange tube 2 is stretched out using a tool, and expanded to the fin hole of the fin 1 11 in. That is, in a state where two circumferentially opposite edge portions 21 are butted and the heat exchange tubes 2 are stretched, the heat exchange tubes 2 and the fin holes 11 of the fins 1 are in interference fit.

17 to 19, according to an embodiment of the present invention, the insert 30 is inserted between two circumferentially opposite edge portions 21 of the main body 20, for example, the insert 30 has an opposite first contact surface and a second contact surface. Two contact surfaces, the first contact surface is in contact with one of the two edge portions 21 of the main body 20 and has a shape substantially complementary to one of the two edge portions 21 of the main body 20, and the second contact surface is in contact with one of the two edge portions 21 of the main body 20. The other of the two edge portions 21 of the main body 20 is in contact with and has a shape substantially complementary to the other of the two edge portions 21 of the main body 20 .

The number of holes or channels 23 in the sub-heat exchange tubes 22 can be 1, 2, 3, 4, etc. any number. The number of holes or channels 23 in the sub-heat exchange tubes 22 may be the same or different.

In addition, the heat exchange tubes in the above embodiments are circular tubes, however, the heat exchange tubes may also be tubes with other cross-sections such as elliptical tubes, so the cross-sections of the sub-heat exchange tubes 22 also change accordingly.

As shown in Figures 11 to 13, the closed heat exchange tube 2 is inserted into the fin hole 11 of the fin 1. In this state, there is a certain gap between the heat exchange tube 2 and the fin hole 11 of the fin 1. Therefore, the heat exchange tubes can be easily inserted into the fin holes 11 .

After the heat exchange tube 2 is inserted into the fin hole 11 of the fin 1, the insert 3 can be used for expansion. The insert 3 can be a structure that completely fills the center hole of the heat exchange tube or only supports the opening of the heat exchange tube, that is, two The configuration of the circumferentially opposite edge portions 21 . Referring to FIGS. 14 to 19 , in the expanded state of the heat exchange tube, the outer wall of the heat exchange tube and the inner wall of the fin hole 11 of the fin 1 have been completely bonded to achieve the purpose of heat conduction. The insert 3 can have any suitable shape, as long as the heat exchange tube is stretched and the outer wall of the heat exchange tube is kept in sufficient contact with the inner wall of the fin hole 11 of the fin 1 to achieve the purpose of heat exchange.

A method of manufacturing a heat exchanger according to an embodiment of the present invention is described below.

1 to 19, the method for manufacturing a heat exchanger 100 according to an embodiment of the present invention includes the following steps: providing a fin 1 having a fin hole 11; providing a heat exchange tube 2; Inserting the heat exchange tube 2 into the fin hole 11 of the fin 1 when the heat exchange tube 2 is in the closed state; and expanding the heat exchange tube 2 into the fin hole 11 of the fin 1 . The step of expanding the heat exchange tubes in the fin holes of the fins may include: providing an insert 3; and inserting at least a part of the insert 3 into a central hole formed by the main body 20 or two Between two circumferentially opposite edge portions 21. The method may further include: before inserting the heat exchange tube 2 into the fin hole 11 of the fin 1 , spraying the heat exchange tube 2 when the heat exchange tube 2 is unfolded.

According to the embodiments of the present invention, the problem of expansion or assembly of the heat exchange tubes and fins with fine or small inner diameters is solved, and the risk of rupture of the heat exchange tubes caused by internal expansion of conventional heat exchange tubes is reduced. In addition, since the heat exchange tube can be expanded, it can be ensured that both sides (inner peripheral surface and outer peripheral surface) of the heat exchange tube can be sprayed with zinc or surface sprayed well.

In addition, according to the ring heat pipe of the embodiment of the present invention, the heat exchange pipe is integrated, thereby facilitating installation. In addition, when the heat exchange tube is in the closed state, there will be a certain residual stress in the connecting piece, which is convenient for the heat exchange tube to expand during the expansion joint.

In addition, according to the embodiment of the present invention, the heat exchange tube can be made into a capillary tube, which is beneficial to the improvement of the heat exchange and strength of the heat exchange tube; it solves the problem that the conventional mechanical expansion joint cannot expand the small-sized heat exchange tube; The problem of partial rupture caused by expansion joint and the sealing problem during expansion joint; the heat exchange tube can be made into diversification, and necessary adjustments can be made according to actual needs; the problem of expansion tube between small diameter heat exchange tube and fin Difficulty; solve the problem that the inner surface of the C-shaped heat exchange tube cannot be sprayed with zinc or surface spray; the heat exchange tube according to the embodiment of the present invention is easier to expand; compared with the conventional circular single-hole heat exchange tube, according to the implementation of the present invention The heat exchange tube of the example can effectively reduce the charging amount of working fluid, increase the surface area of the heat exchange tube, thereby improving the heat exchange efficiency; compared with the conventional microchannel porous heat exchange flat tube, this fin assembly method does not require welding process, Helps to reduce costs; compared with conventional microchannel flat tubes, the assembly of heat exchange tubes and fins according to embodiments of the present invention is helpful for defrosting and condensed water discharge, and is conducive to the promotion of microchannel heat exchange tubes in Application in refrigeration and air conditioning heat pump conditions.

Furthermore, the above-described embodiments according to the present invention can be combined into new embodiments.

Claims (16)

1. A heat exchange tube, comprising: The main body, which has a tubular shape and has two circumferentially opposite edge portions when viewed in an installed state, includes a plurality of sub-heat exchange tubes, and a connecting piece connecting adjacent sub-heat exchange tubes. 2. The heat exchange tube according to claim 1, wherein: When viewed in an installed state, the plurality of sub-heat exchange tubes have substantially arc-shaped outer surfaces. 3. The heat exchange tube according to claim 1, wherein: At least one of the plurality of sub heat exchange tubes has one hole or a plurality of holes arranged circumferentially along the heat exchange tube. 4. The heat exchange tube according to claim 1, wherein: The connecting piece is deformable so that the heat exchange tubes can be unfolded and closed. 5. The heat exchange tube according to claim 1, wherein: In cross-section, the heat exchange tubes have an approximately partial ring shape or a C-shape when viewed in the installed state. 6. The heat exchange tube according to claim 1, wherein: The connecting piece is a sheet piece. 7. The heat exchange tube according to claim 1, wherein: The connection piece is arranged at the outer periphery of the heat exchange tube when viewed in the installed state. 8. The heat exchange tube according to claim 5, wherein: The connecting piece is arranged at the inner circumference of the heat exchange tube when viewed in the installed state. 9. The heat exchange tube according to claim 5, wherein: The connecting piece is arranged between the inner and outer peripheries of the heat exchange tubes when viewed in an installed state. 10. The heat exchange tube according to claim 1, wherein: The connection piece is continuous in the axial direction of the heat exchange tube, or is a plurality of spaced apart connection pieces arranged in the axial direction of the heat exchange tube. 11. The heat exchange tube according to claim 1, wherein: When viewed in an unfolded state, in cross section, the plurality of sub-heat exchange tubes are arranged in a row. 12. A heat exchanger comprising: fins having fin holes; and The heat exchange tube according to any one of claims 1 to 11, which is inserted into a fin hole of the fin. 13. The heat exchanger of claim 12, further comprising: An insert, at least part of which is inserted into a central hole formed by the body or between two circumferentially opposing edge portions of the body. 14. A method of manufacturing a heat exchanger, comprising the steps of: providing fins having fin holes; providing a heat exchange tube according to any one of claims 1 to 11; inserting the heat exchange tubes into the fin holes of the fins when the heat exchange tubes are in a closed state; and The heat exchange tubes are expanded into the fin holes of the fins. 15. The method of manufacturing a heat exchanger according to claim 14, wherein: The step of expanding the heat exchange tubes in the fin holes of the fins includes: provide inserts; and At least a portion of the insert is inserted into a central bore formed by the body or between two circumferentially opposing edge portions of the body. 16. The method of manufacturing a heat exchanger according to claim 14, further comprising: Before inserting the heat exchange tubes into the fin holes of the fins, the heat exchange tubes are sprayed when the heat exchange tubes are in a unfolded state.