CN114440686A

CN114440686A - Heat exchanger fin, heat exchanger and air conditioning system

Info

Publication number: CN114440686A
Application number: CN202210105490.6A
Authority: CN
Inventors: 李丰; 孙西辉; 田帆; 卢延风; 徐乐乐
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-05-06

Abstract

The application discloses heat exchanger fin, heat exchanger and air conditioning system. The heat exchanger fin comprises a fin body, wherein the fin body is provided with a plurality of mounting holes which are arranged at intervals along a first direction of the fin body, and the mounting holes are used for mounting flat pipes; the fin body is further provided with an elastic buffering part, at least one part of the elastic buffering part is arranged on at least one side of the mounting hole in the first direction and extends along the second direction of the fin body, and the second direction is perpendicular to the first direction. The application provides a technical scheme can improve the production efficiency of heat exchanger.

Description

Heat exchanger fin, heat exchanger and air conditioning system

Technical Field

The application relates to the technical field of heat exchange, in particular to a heat exchanger fin, a heat exchanger and an air conditioning system.

Background

For the heat exchange industry, how to provide a stable, reliable and energy-efficient product is a general proposition in the field. The efficiency of the product is improved by simply improving the performance of parts in the system or increasing the heat exchange area of the heat exchanger, the cost of equipment is increased, a large amount of non-renewable resources are wasted, and the purchase cost of consumers is increased. The finned heat exchanger is gradually applied to heat exchangers of automobiles and household air conditioners due to the advantages of high heat exchange efficiency, compact structure, small weight and volume, small refrigerant filling amount, environmental protection, low cost and the like.

In the development of heat exchange technology, how to improve the production efficiency of a heat exchanger is a technical problem to be solved urgently.

Disclosure of Invention

The application provides a heat exchanger fin, heat exchanger and air conditioning system, can improve the production efficiency of heat exchanger.

In a first aspect, an embodiment of the present application provides a heat exchanger fin, which includes a fin body, where the fin body is provided with a plurality of mounting holes, the mounting holes are arranged at intervals along a first direction of the fin body, and the mounting holes are used for mounting flat tubes; the fin body is further provided with an elastic buffering part, at least one part of the elastic buffering part is arranged on at least one side of the mounting hole in the first direction and extends along the second direction of the fin body, and the second direction is perpendicular to the first direction.

Above-mentioned technical scheme, when making the heat exchanger, flat pipe inserts in the mounting hole and expands in the fin body through the mode expanded joint of machinery expanded joint, physiosis or liquid bloated. Compared with a scheme without elastic buffering, the scheme has the advantages that the elastic buffering part which can deform and has elastic characteristics is arranged on the fin body, so that the part of the flat tube, corresponding to the elastic buffering part, can be subjected to smaller constraint force in the expansion joint process, and the expansion joint difficulty of the flat tube is further reduced; after the expansion joint is finished, due to the elastic force of the elastic buffering part, the part of the fin body corresponding to the elastic buffering part has the trend of shrinking towards the direction of the flat pipe, so that the flat pipe is extruded towards the flat pipe after shrinking, and the reduction of the expansion joint rate (expansion joint combination rate) is avoided. Therefore, the elastic buffer part is arranged on the fin body, so that the expansion joint difficulty of the flat tubes can be reduced, the expansion joint rate of the flat tubes is ensured, and the production efficiency of the heat exchanger is improved.

In some embodiments of the first aspect of the present application, at least a portion of the elastic buffer portion is disposed on both sides of the mounting hole in the first direction.

According to the technical scheme, at least one part of the elastic buffer part is arranged on the two sides of the mounting hole in the first direction, so that the constraint force of the two sides of the flat pipe in the thickness direction is smaller when the flat pipe is in expanded joint, the two sides of the flat pipe in the thickness direction can generate larger deformation, and the expanded joint difficulty of the flat pipe is reduced; and after the expanded joint is finished, the parts of the fin bodies on the two sides in the thickness direction of the flat pipes can have the tendency of shrinking the flat pipes to extrude the flat pipes, so that the expanded joint rate of the flat pipes is ensured.

In some embodiments of the first aspect of the present application, the resilient bumper is disposed around the mounting hole.

According to the technical scheme, the elastic buffer parts are arranged around the mounting holes, namely, when the flat tubes are in expanded joint, all parts of the fin body corresponding to the flat tubes exert small constraint force on the flat tubes, so that the flat tubes generate large deformation in all directions, the tight fit between the flat tubes and the fin body is ensured, and the expanded joint difficulty of the flat tubes is reduced; after the expanded joint is finished, all parts of the fin body corresponding to the flat pipes have the tendency of shrinking the flat pipes to extrude the flat pipes, and further the expanded joint rate of the flat pipes is ensured.

In some embodiments of the first aspect of the present application, the cross-section of the elastic buffer portion is curved or dog-leg shaped.

Above-mentioned technical scheme is the camber line through the cross section setting with elastic buffer portion or dogleg shape for elastic buffer portion has better elastic characteristic, and the fin body is to the binding power of flat pipe when can reduce the expanded joint effectively, makes the fin body have after the expanded joint to the trend of flat tub shrink in order to extrude flat tub.

In some embodiments of the first aspect of the present application, the fin body includes a first surface and a second surface that are oppositely disposed in a thickness direction thereof, and the elastic buffer portion is a groove provided on the first surface.

Above-mentioned technical scheme, elastic buffer is the recess, and it can be formed in the first surface of fin body through simple technology to realize that flat pipe receives less constraining force when the expanded joint, produce great deformation volume and closely laminate with the fin body, flat pipe closely laminates with the fin body because of the shrink of fin body when the expanded joint finishes.

In some embodiments of the first aspect of the present application, the first surface is further provided with a drainage channel, and one end of the drainage channel is communicated with the groove for leading out the hydraulic pressure in the groove.

Above-mentioned technical scheme because elastic buffer portion is the recess, can have moisture remaining problem, so for discharge effectively and remain in the moisture in, hydrops promptly sets up water drainage tank for hydrops in elastic buffer portion is discharged along water drainage tank, and then guarantees the heat transfer effect of heat exchanger.

In some embodiments of the first aspect of the present application, the elastic buffer is formed by press molding.

Above-mentioned technical scheme, elastic buffer portion accessible stamping process forms in the fin body, can improve the production efficiency of fin body, and then improves the production efficiency of heat exchanger.

In some embodiments of the first aspect of the present application, the inner wall of the mounting hole includes a first inner wall and a second inner wall that are oppositely disposed along the first direction, the first inner wall is a plane, and the second inner wall is arched in a direction away from the first inner wall.

According to the technical scheme, the second inner wall is arched in the direction deviating from the first inner wall, so that the restraining force of the second inner wall of the fin body on the flat pipe in the expansion joint process is unequal, deformation of the flat pipe in different degrees at corresponding positions is achieved, the surface of the flat pipe after final expansion joint at the position corresponding to the arched part of the second inner wall presents a highest point, two sides of the highest point are gradually reduced (the outer edge of the flat pipe corresponding to the second inner wall is inclined, the outer edge of the flat pipe is inclined from the high point to the low points at two sides so as to be beneficial to flowing of liquid, meanwhile, the high point can also refer to the position where deformation is maximum when the flat pipe is expanded and jointed), and later-stage drainage of the heat exchanger is facilitated.

In a second aspect, an embodiment of the present application provides a heat exchanger, including: flat tubes; according to the heat exchanger fin of any embodiment of the first aspect, the flat tube is inserted into the mounting hole and is in expanded connection with the fin body.

In a third aspect, an embodiment of the present application provides an air conditioning system, including the heat exchanger described in the second aspect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic illustration of a heat exchanger according to some embodiments of the present application;

FIG. 2 is a perspective view of a heat exchanger fin according to some embodiments of the present application;

FIG. 3 is a schematic illustration of a heat exchanger fin according to some embodiments of the present application;

FIG. 4 is a schematic view of a heat exchanger fin according to further embodiments of the present application;

FIG. 5 is a schematic view of a heat exchanger fin according to further embodiments of the present application;

FIG. 6 is a cross-sectional view taken at angle A-A of FIG. 3;

FIG. 7 is an enlarged view at B in FIG. 6;

FIG. 8 is a schematic cross-sectional view of an elastomeric cushioning portion of further embodiments of the present application;

FIG. 9 is a schematic cross-sectional view of an elastomeric cushioning portion of further embodiments of the present application;

FIG. 10 is a schematic cross-sectional view of an elastomeric cushioning portion of further embodiments of the present application;

FIG. 11 is a schematic view of a heat exchanger fin according to further embodiments of the present application;

FIG. 12 is a schematic view of a heat exchanger fin according to further embodiments of the present application;

FIG. 13 is a schematic view of a heat exchanger fin according to further embodiments of the present application;

FIG. 14 is a schematic view of a mounting hole in some embodiments of the present application;

fig. 15 is a schematic view of the flattened tube after expansion joint in some embodiments of the present application.

Icon: 10-heat exchanger fins; 11-a fin body; 12-mounting holes; 13-an elastic buffer; 14-a drainage channel; 110-a first surface; 111-a second surface; 120-a first inner wall; 121-a second inner wall; 130-a first portion; 131-a second portion; 132-a third portion; 133-fourth section; 134-perforation; 20-flat tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different elements and not for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "attached" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The term "and/or" in this application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments of the present application, like reference numerals denote like components, and in the different embodiments, detailed descriptions of the like components are omitted for the sake of brevity. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the integrated device shown in the drawings are only exemplary and should not constitute any limitation to the present application.

The appearances of "a plurality" in this application are intended to mean more than two (including two).

The heat exchanger is widely applied to the fields of chemical industry, petroleum industry, power industry, food industry and other industrial production, has different functions in different fields and different application scenes, for example, the heat exchanger can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like in the chemical production, and is widely applied.

Heat exchangers come in many forms, such as can heat exchangers, shell and tube heat exchangers, finned heat exchangers, and the like. The finned heat exchanger is one of the most widely used heat exchange equipment in gas and liquid heat exchangers, and has the advantages of good and stable heat transfer performance, small air passing resistance and the like. The finned heat exchanger achieves the purpose of enhancing heat transfer by additionally arranging fins on a common heat exchange tube. The traditional finned heat exchanger mainly adopts a mechanical expansion joint, an air expansion, a liquid expansion or furnace welding mode to realize the close attachment of the heat exchange tube and the fins, and the heat exchange thermal resistance of the heat exchanger during working is reduced. The expansion joint finger is a connection method for firmly expanding and fixing the heat exchange tube on the fin by using a tube expander and high-pressure gas or high-pressure fluid according to the characteristic that the heat exchange tube (flat tube) has plastic deformation.

For a micro-channel heat exchanger (a heat exchanger with the channel equivalent diameter of 10-1000 mu m, tens of fine flow channels are arranged in a flat tube of the heat exchanger), because the channel is small and mechanical expansion joint cannot be realized, the integral connection between the flat tube and the fin is realized by adopting a fin integral furnace welding mode at present, or gas expansion and liquid expansion can be considered. However, the integral furnace-passing welding can seriously damage the hydrophilic coating of the heat exchanger and cannot ensure the drainage of the heat exchanger in the later use, and the liquid expansion can cause the residual liquid in the micro-channel to seriously influence the heat exchange, so the gas expansion becomes the optimal choice.

The size of the restraining force of the fins on the flat pipes determines the expansion joint difficulty of the flat pipes (the larger the restraining force is, the larger the expansion joint difficulty is), and after the expansion of the flat pipes is finished, the shrinkage of the flat pipes can form gaps between the flat pipes and the fins so as to influence the expansion joint rate of the flat pipes, so that the key for improving the production efficiency of the heat exchanger is how to reduce the restraining force of the fins on the flat pipes and ensure the expansion joint rate.

In view of this, in order to reduce the expansion joint difficulty of the flat tubes, ensure the expansion joint rate and improve the production efficiency of the heat exchanger, through intensive research, the inventor designs a heat exchanger fin, which comprises a fin body, wherein the fin body is provided with a plurality of mounting holes, the plurality of mounting holes are arranged at intervals along a first direction of the fin body, and the mounting holes are used for mounting the flat tubes; the fin body is further provided with an elastic buffering part, and at least one part of the elastic buffering part is arranged on at least one side of the mounting hole in the first direction and extends along the second direction of the fin body. The first direction and the second direction are perpendicular to each other. In some embodiments, the first direction may be a length direction of the fin body, and the second direction may be a width direction of the fin body.

The elastic buffering part which can deform and has elastic characteristics is arranged at the position, corresponding to the mounting hole, of the fin body, so that on one hand, the constraint force of the part, corresponding to the elastic buffering part, of the fin body on the flat pipe can be reduced, the position, corresponding to the elastic buffering part, of the flat pipe in the expansion joint process is subjected to smaller constraint force, the flat pipe can be tightly attached to the fin body in a larger deformation amount, and the expansion joint difficulty of the flat pipe is further reduced; on the other hand, the part of the fin body corresponding to the elastic buffer part has the tendency of shrinking towards the direction of the flat pipe, and the tolerance between the fin body and the fin body due to shrinkage after the expansion of the flat pipe is finished is absorbed in an extrusion mode, so that the expansion joint rate reduction caused by shrinkage of the flat pipe is avoided.

The technical scheme described in the embodiment of the application is suitable for the heat exchanger, and the heat exchanger can be suitable for but not limited to systems such as an air conditioning system and a heat pump system.

Referring to fig. 1, fig. 1 is a schematic view of a heat exchanger according to some embodiments of the present disclosure, and fig. 1 illustrates a partial structure of the heat exchanger.

The heat exchanger includes heat exchanger fin 10 and flat pipe 20, and heat exchanger fin 10 includes fin body 11, is provided with mounting hole 12 on the fin body 11, and mounting hole 12 is used for installing flat pipe 20. The flat tubes 20 are inserted into the mounting holes 12 and are expanded with the fin body 11. The flat tube 20 can be expanded to the fin body 11 in a mechanical expansion, gas expansion or liquid expansion mode. In this application, the heat exchanger can be the microchannel heat exchanger, and flatulence can be adopted with the expanded joint mode of fin body 11 to flat pipe 20. In some embodiments, the number of the heat exchanger fins 10 may be multiple, and multiple heat exchanger fins 10 are arranged side by side at intervals along the length direction of the flat tubes 20, and the gas can flow through the intervals between the adjacent heat exchanger fins 10. The flat tubes 20 are for allowing a refrigerant to pass therethrough, and gas flowing through the spaces between the heat exchanger fins 10 acts on the outer surfaces of the flat tubes 20 to exchange heat with the refrigerant.

In some embodiments of the present application, please refer to fig. 2 and 3, fig. 2 is a perspective view of a partial structure of a heat exchanger fin 10 in some embodiments of the present application, fig. 3 is a partial schematic view of the heat exchanger fin 10 in some embodiments of the present application, and fig. 2 and 3 illustrate the partial structure of the heat exchanger fin 10. In fig. 3, the first direction of the fin body 11 is indicated by reference numeral Y, and the second direction is indicated by reference numeral X.

The heat exchanger fin 10 includes a fin body 11, a plurality of mounting holes 12 are provided on the fin body 11, the plurality of mounting holes 12 are arranged at intervals along a first direction of the fin body 11 (fig. 13 may be combined), and the mounting holes 12 are used for mounting the flat tubes 20. The fin body 11 is further provided with an elastic buffer portion 13, and at least a portion of the elastic buffer portion 13 is disposed on at least one side of the mounting hole 12 in the first direction and extends along the second direction of the fin body 11. The second direction is perpendicular to the first direction. The first direction may be a length direction of the fin body, and the second direction may be a width direction of the fin body.

"at least a part of the elastic buffer 13 is provided on at least one side of the mounting hole 12 in the first direction and extends in the second direction of the mounting hole 12 in the fin body 11", may refer to a part of the elastic buffer 13 or the entire elastic buffer 13, may be provided on either one side or both sides of the mounting hole 12 in the first direction, and a part or the entire elastic buffer 13 provided on either one side or both sides of the mounting hole 12 in the first direction may extend in the second direction.

The elastic buffer portion 13 is a member that can be deformed by an acting force generated when the flat tube 20 is expanded to reduce a restraining force of the fin body 11 on the flat tube 20, and can generate an elastic force in a direction of the flat tube 20 after the expansion is completed to allow the fin body 11 to squeeze the flat tube 20.

Compared with the existing fin body 11, namely the fin body 11 without the elastic buffer part 13, the deformable elastic buffer part 13 with elastic characteristics is arranged on the fin body 11, so that the part of the flat tube 20 corresponding to the elastic buffer part 13 is subjected to smaller constraint force in the expansion joint process, the flat tube 20 can generate larger deformation to be tightly attached to the fin body 11, and the expansion joint difficulty of the flat tube 20 is further reduced; after finishing expanding joint, the elastic force of elastic buffer part 13 itself can make fin body 11 have the trend of contracting to flat pipe 20's direction corresponding to the position of elastic buffer part 13 to flat pipe 20 shrink back, extrude to flat pipe 20, and then avoid flat pipe 20 to reduce because of the expanded joint rate that the shrink leads to. Therefore, the elastic buffer part 13 arranged on the fin body 11 can reduce the expansion joint difficulty of the flat tubes 20, ensure the expansion joint rate of the flat tubes 20 and further improve the production efficiency of the heat exchanger.

Alternatively, in other embodiments, such as FIG. 4, FIG. 4 is a schematic view of a heat exchanger fin 10 according to other embodiments of the present application. In fig. 4, the entire elastic buffer part 13 is arranged on one side of the mounting hole 12 in the first direction, the elastic buffer part 13 is located on the upper side of the mounting hole 12, when the flat tube 20 is inserted into the mounting hole 12 and expanded, the restraining force applied to the upper surface of the flat tube 20 is reduced by the elastic buffer part 13, so that a large deformation amount can be generated on the upper surface of the flat tube 20 to be tightly attached to the fin body 11; after the expansion joint is finished, due to the existence of the elastic buffer parts 13, the upper surfaces of the flat pipes 20 can be subjected to downward extrusion force, so that the flat pipes 20 and the fin bodies 11 are tightly attached.

In some embodiments of the present application, at least a part of the elastic buffer portion 13 is disposed at both sides in the width direction of the mounting hole 12.

"at least a part of the elastic buffer portion 13 is disposed on both sides of the mounting hole 12 in the first direction", may refer to a part of the elastic buffer portion 13 or the entire elastic buffer portion 13, and may be disposed on both sides of the mounting hole 12 in the first direction, that is, both sides of the mounting hole 12 in the first direction are provided with the elastic buffer portions 13.

By arranging at least a part of the elastic buffer part 13 at two sides of the mounting hole 12 in the first direction, when the flat pipe 20 is expanded, the constraint force of the flat pipe 20 at two sides in the thickness direction (namely the first direction) is smaller, so that the two sides of the flat pipe 20 in the thickness direction can generate larger deformation, and the tight fit between the flat pipe 20 and the fin body 11 is ensured; and after the expanded joint is finished, the parts of the fin bodies 11 on the two sides in the thickness direction of the flat pipes 20 can have the tendency of shrinking the flat pipes 20 to extrude the flat pipes 20, so that the expanded joint rate of the flat pipes 20 and the fin bodies 11 is ensured.

Alternatively, referring to fig. 5, fig. 5 is a schematic view of a heat exchanger fin 10 according to other embodiments of the present application. Elastic buffer 13 includes two parts, two parts set up respectively in the both sides of mounting hole 12 in the first direction, part elastic buffer 13 is located the upside of mounting hole 12 promptly, another part elastic buffer 13 is located the downside of mounting hole 12, in order to reduce flat pipe 20 upper surface and lower surface respectively and receive the constraining force of fin body 11, and then reduce flat pipe 20's the expanded joint degree of difficulty, and can apply the extrusion force to flat pipe 20 upper surface and lower surface respectively, and then guarantee flat pipe 20's expanded joint rate.

In some embodiments of the present application, as shown in fig. 3, the elastic buffer 13 is disposed around the mounting hole 12.

The elastic buffer 13 is disposed around the mounting hole 12, that is, the elastic buffer 13 may be regarded as four portions, for example, a first portion 130, a second portion 131, a third portion 132, and a fourth portion 133, the first portion 130 and the second portion 131 are respectively located on both sides of the mounting hole 12 in the width direction, and the third portion 132 and the fourth portion 133 are respectively located on both sides of the mounting hole 12 in the second direction. The first portion 130 and the second portion 131 extend in the second direction, the third portion 132 and the fourth portion 133 are each arc-shaped, two ends of the third portion 132 are respectively connected to one ends of the first portion 130 and the second portion 131, which are located on the same side of the mounting hole 12 in the second direction, and two ends of the fourth portion 133 are respectively connected to the other ends of the first portion 130 and the second portion 131, which are located on the same side of the mounting hole 12 in the second direction.

The elastic buffer parts 13 are arranged around the mounting holes 12, that is, when the fin body 11 is expanded, all parts corresponding to the flat tubes 20 apply small constraint force to the flat tubes 20, so that the flat tubes 20 generate large deformation in all directions to ensure that the flat tubes 20 are tightly attached to the fin body 11; after finishing expanding connection, all parts of the fin body 11 corresponding to the flat tubes 20 have the tendency of shrinking the flat tubes 20 to extrude the flat tubes 20, so that the expanding connection rate of the flat tubes 20 is ensured.

In some embodiments of the present application, please refer to fig. 6 and 7, fig. 6 is a cross-sectional view taken from a-a in fig. 3, and fig. 7 is an enlarged view taken at B in fig. 6. The cross section of the elastic buffer part 13 is in an arc shape or a fold shape.

The cross section of the elastic buffer portion 13 refers to a cross section of the elastic buffer portion 13 perpendicular to the extending direction thereof.

The cross section of the elastic buffer part 13 is arc-shaped or zigzag-shaped, so that the elastic buffer part 13 has good elastic characteristics, the constraint force of the fin body 11 on the flat pipe 20 during expanded joint can be effectively reduced, and the fin body 11 is ensured to have the trend of contracting the flat pipe 20 to extrude the flat pipe 20 after the expanded joint is finished.

In fig. 7, it can be seen that the cross section of the elastic buffer portion 13 is semicircular. Optionally, referring to fig. 8, fig. 8 is a schematic cross-sectional view of the elastic buffer portion 13 in another embodiment of the present application, and in fig. 8, the cross-section of the elastic buffer portion 13 may be a wavy arc, which can effectively reduce a constraining force of the portion of the fin body 11 corresponding to the elastic buffer portion 13 on the flat tube 20, and can effectively provide a squeezing force for the flat tube 20. Optionally, referring to fig. 9, fig. 9 is a schematic cross-sectional view of the elastic buffer 13 in other embodiments of the present application, in fig. 9, the cross-section of the elastic buffer 13 may be a polygonal line, and the polygonal line is in a corner shape, which can effectively reduce the constraining force of the portion of the fin body 11 corresponding to the elastic buffer 13 on the flat tube 20, and can effectively provide the squeezing force for the flat tube 20. Optionally, referring to fig. 10, fig. 10 is a schematic cross-sectional view of the elastic buffering portion 13 in other embodiments of the present application, in fig. 10, the cross-section of the elastic buffering portion 13 may be a zigzag, and the zigzag is in a shape of multiple zigzag, and may be seen as a plurality of lines being mutually bent, which can effectively reduce the constraining force of the fin body 11 corresponding to the elastic buffering portion 13 on the flat tube 20, and can effectively provide a squeezing force for the flat tube 20.

In some embodiments of the present application, as shown in fig. 7, the fin body 11 includes a first surface 110 and a second surface 111 oppositely disposed in a thickness direction thereof, and the elastic buffer 13 is a groove provided on the first surface 110.

When the elastic buffer part 13 is a groove, the elastic buffer part can be simply formed on the first surface 110 of the fin body 11 by a process, so that the flat tube 20 is subjected to a small constraint force during expansion joint, generates a large deformation amount and is tightly attached to the fin body 11, and the flat tube 20 is tightly attached to the fin body 11 due to shrinkage of the fin body 11 after the expansion joint is finished. The elastic buffer 13 may be formed on the fin body 11 by a process of stamping or integral molding. It should be noted that the second surface 111 may be a plane, or may be convex in a direction away from the first surface 110 at a position corresponding to the groove of the first surface 110. For example, when the elastic buffer 13 is formed by punching, the first surface 110 may be formed as a groove, and the second surface 111 may be formed as a protrusion by the punching force.

Alternatively, in other embodiments, as shown in fig. 11, fig. 11 is a schematic view of a heat exchanger fin 10 according to other embodiments of the present application. The elastic buffer portion 13 may include a groove formed on the surface of the fin body 11, and a plurality of perforations 134, the perforations 134 being located in the groove and penetrating through the fin body 11, the plurality of perforations 134 being arranged at intervals along the extending direction of the groove. Perforations 134 may be in the form of strips, with perforations 134 extending in a direction perpendicular to the surface of flattened tube 20, such as when a groove is located on one side of mounting hole 12 in a first direction, with perforations 134 located in the groove extending in the first direction.

When the elastic buffer 13 includes the groove and the through hole 134, the elastic buffer can be formed on the first surface 110 of the fin body 11 through a simple process, such as a stamping process, so that the flat tube 20 is subjected to a small constraint force during expansion, a large deformation amount is generated to be tightly attached to the fin body 11, and the flat tube 20 is tightly attached to the fin body 11 due to shrinkage of the fin body 11 at the end of expansion. Meanwhile, compared with the scheme that the elastic buffer part 13 is only a groove, the additional arrangement of the through hole 134 can further improve the elastic characteristic of the elastic buffer part 13, so as to provide smaller constraint force and larger extrusion force for the flat tube 20.

Optionally, in some embodiments, as in fig. 2 and 3. The first surface 110 is further provided with a drainage groove 14, and one end of the drainage groove 14 is communicated with the groove and used for leading out accumulated liquid in the groove.

The addition of the elastic buffer part 13 may cause the residual moisture in the elastic buffer part 13 to form accumulated liquid in the drainage process of the heat exchanger, which is not easy to drain. Consequently through setting up water drainage tank 14 for water drainage tank 14's one end intercommunication recess (elastic buffer portion 13), the hydrops is discharged by the other end, plays the effect of removing the remaining moisture of elastic buffer portion 13, and then guarantees the heat transfer effect of heat exchanger.

It should be noted that, in fig. 2 and fig. 3, the drainage groove 14 is provided on the vertical center line of the length direction of the fin body 11, but in the present application, the specific position of the drainage groove 14 is not limited, so as to achieve the effect of draining the residual moisture in the elastic buffer portion 13, for example, refer to fig. 12, fig. 12 is a schematic view of the heat exchanger fin 10 in other embodiments of the present application, and fig. 12 shows a partial structure of the heat exchanger fin 10. In fig. 12, the drain grooves 14 may be provided obliquely to the fin body 11 so as to be located on the side of the vertical center line in the longitudinal direction of the fin body 11.

In other embodiments of the present application, please refer to fig. 13, and fig. 13 is a schematic view of a heat exchanger fin 10 according to other embodiments of the present application. The drain groove 14 communicates two adjacent elastic buffer portions.

Fig. 13 illustrates an exemplary structure of a heat exchanger fin 10, in which four mounting holes are formed at intervals along a first direction (in some other embodiments, the number of the mounting holes is not limited), and each mounting hole 12 is correspondingly provided with an elastic buffer portion 13, so as to reduce the expansion joint difficulty of the flat tubes 20 and ensure the expansion joint rate. Two adjacent elastic buffer portions 13 (grooves) are communicated through a drain groove 14.

Among the above-mentioned technical scheme, for the moisture of discharging effectively and remaining in the recess, set up two adjacent recesses of water drainage tank 14 intercommunication (elastic buffer portion 13) for hydrops in a plurality of elastic buffer portions 13 are by from top to bottom (generally, when in actual use, the positional relation of a plurality of mounting holes 12 is by from top to bottom interval arrangement in proper order) arrange the bottommost end of heat exchanger, and then guarantee the heat transfer effect of heat exchanger.

It should be noted that in some embodiments, one end of the drainage groove 14 communicates with the elastic buffer portion 13, and the other end may extend to the edge of the fin body 11. Or, in some embodiments, the partial drainage groove 14 communicates with two adjacent elastic buffer parts 13, one end of the partial drainage groove 14 communicates with the elastic buffer part 13, and the other end may extend to the edge of the fin body 11.

In some embodiments of the present application, the elastic buffer 13 is formed by press molding.

Above-mentioned technical scheme, elastic buffer 13 accessible stamping process forms in fin body 11, can improve fin body 11's production efficiency, and then improves heat exchanger's production efficiency.

It should be noted that the existing fin-type heat exchanger has poor drainage performance and affects its heat exchange performance, so how to optimize its drainage performance is a key to improve the heat exchange performance of the heat exchanger.

In view of this, in order to optimize the drainage performance of the fin heat exchanger and improve the heat exchange performance of the heat exchanger, in some embodiments of the present application, please refer to fig. 14 and fig. 15, where fig. 14 is a schematic view of the mounting hole 12 in some embodiments of the present application, and fig. 15 is a schematic view of the flat tube 20 after expansion joint in some embodiments of the present application. In fig. 14, the width direction of the mounting hole 12 is denoted by reference character Y.

The inner wall of the mounting hole 12 includes a first inner wall 120 and a second inner wall 121 oppositely arranged along a first direction, the first inner wall 120 is a plane, and the second inner wall 121 is arched in a direction away from the first inner wall 120.

The first inner wall 120 and the second inner wall 121 correspond to both surfaces of the flat tube 20 in the thickness direction thereof (i.e., the first direction), respectively. When second inner wall 121 is curved in a direction away from first inner wall 120, second inner wall 121 is understood to be a non-flat surface having a non-uniform clearance with the surface of flat tube 20. The position of flat tube 20 corresponding to the camber is subject to the least amount of constraining force, and therefore the amount of deformation caused by the expansion of flat tube 20 is greatest at this position.

The second inner wall 121 is arched in a direction away from the first inner wall 120, so that the flat tubes 20 are subjected to different constraining forces of the fin body 11 in the expansion joint process, deformation of the flat tubes 20 at corresponding positions is achieved in different degrees, and further, the surface of the flat tubes 20 corresponding to the second inner wall 121 after final expansion joint presents a highest point (in fig. 15, the reference sign CC represents a "high point"), two sides of the highest point are gradually reduced (the outer edge of the flat tubes 20 corresponding to the second inner wall 121 is inclined, and the outer edge of the flat tubes 20 is inclined from the high point to the low points at two sides so as to facilitate liquid flow, meanwhile, the "high point" also can refer to a position where deformation is maximum when the flat tubes 20 are expanded joint), and later stage drainage of the heat exchanger is facilitated.

In some embodiments of the present application, the present application further provides a heat exchanger, which includes the flat tubes 20 and the heat exchanger fins 10 described in the above embodiments. The flat tubes 20 are inserted into the mounting holes 12 and are expanded with the fin body 11.

In some embodiments of the present application, the present application further provides an air conditioning system comprising the heat exchanger described in the above embodiments.

In some embodiments of the present application, the present application further provides a heat exchanger fin 10, please refer to fig. 2, fig. 3, fig. 6, fig. 7, and fig. 14. The heat exchanger fin 10 includes a fin body 11, and the fin body 11 is provided with a mounting hole 12, an elastic buffer portion 13, and a drain groove 14. Mounting holes 12 are used for mounting flat tubes 20, so that flat tubes 20 can be expanded and connected to fin body 11. The elastic buffer 13 may be a groove disposed on the fin body 11, and the groove surrounds the mounting hole 12. The cross section of the groove is arc-shaped, so the elastic buffer part 13 can be called as an arc-shaped buffer groove. Set up the aim at of arc dashpot, on the one hand, change flat pipe 20 expand and connect the effort of in-process fin body 11 to flat pipe 20, compare in original scheme (the scheme that does not set up the arc dashpot), flat pipe 20 can take place bigger deformation (equal deformation needs littleer effort) under the same effort (expansion joint pressure), consequently when flat pipe 20 expands and connects, under equal expansion joint pressure, when flat pipe 20 takes place to deform after and contacts with fin body 11, fin body 11 is to flat pipe 20's constraining force when this scheme can greatly reduce flat pipe 20 expansion joint, reduce the expansion joint degree of difficulty. On the other hand, the arc-shaped buffer grooves can reversely extrude the outer surface of the flat pipe 20 under the elastic action after expansion joint is finished, and the reduction of expansion joint combination rate caused by the contraction of the flat pipe 20 is avoided. The water drainage groove 14 is a groove structure arranged on the fin body 11, one end of the water drainage groove is communicated with the arc buffer groove, and the effect of draining residual moisture in the arc buffer groove is achieved. In order to optimize the drainage performance of the finned heat exchanger and improve the heat exchange performance of the heat exchanger, the inner walls of the mounting holes 12 include a first inner wall 120 and a second inner wall 121 which are oppositely arranged along a first direction, the first inner wall 120 is a plane, and the second inner wall 121 is arched in a direction away from the first inner wall 120. The second inner wall 121 is arched in a direction away from the first inner wall 120, so that the constraining force of the fin body 11, which is applied to the flat pipe 20 in the expansion joint process, is different, deformation of the flat pipe 20 in different degrees at corresponding positions is realized, and the surface of the flat pipe 20 corresponding to the second inner wall 121 after final expansion joint presents a highest point, which is beneficial to later stage drainage of the heat exchanger.

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

Claims

1. A heat exchanger fin (10) is characterized by comprising a fin body (11), wherein the fin body (11) is provided with a plurality of mounting holes (12), the plurality of mounting holes (12) are arranged at intervals along a first direction of the fin body (11), and the mounting holes (12) are used for mounting flat pipes (20);

the fin body (11) is further provided with an elastic buffering part (13), at least one part of the elastic buffering part (13) is arranged on at least one side of the mounting hole (12) in the first direction and extends along a second direction of the fin body (11), and the second direction is perpendicular to the first direction.

2. The heat exchanger fin (10) according to claim 1,

at least a part of the elastic buffer portion (13) is provided on both sides of the mounting hole (12) in the first direction.

3. The heat exchanger fin (10) according to claim 1,

the elastic buffer part (13) is arranged around the mounting hole (12).

4. The heat exchanger fin (10) according to claim 1,

the cross section of the elastic buffer part (13) is arc-shaped or fold-shaped.

5. The heat exchanger fin (10) according to claim 1,

the fin body (11) comprises a first surface (110) and a second surface (111) which are oppositely arranged along the thickness direction of the fin body, and the elastic buffer part (13) is a groove arranged on the first surface (110).

6. The heat exchanger fin (10) according to claim 5,

still be equipped with water drainage tank (14) on first surface (110), the one end of water drainage tank (14) with the recess intercommunication for draw forth the hydrops in the recess.

7. The heat exchanger fin (10) according to any one of claims 1 to 6,

the elastic buffer part (13) is formed by punching.

8. The heat exchanger fin (10) according to claim 1,

the inner wall of the mounting hole (12) comprises a first inner wall (120) and a second inner wall (121) which are oppositely arranged along the first direction, the first inner wall (120) is a plane, and the second inner wall (121) is arched in the direction away from the first inner wall (120).

9. A heat exchanger, comprising:

flat tubes (20);

the heat exchanger fin (10) according to any one of claims 1 to 8, wherein the flat tube (20) is inserted into the mounting hole (12) and is expanded with the fin body (11).

10. An air conditioning system comprising the heat exchanger of claim 9.