Fin assembly of flat tube heat exchanger and machining device of fin assembly

Abstract

The utility model provides a flat tube heat exchanger fin assembly which comprises a flat tube, at least one heat exchange channel is arranged in the flat tube, the flat tube is provided with a flat face and an installation groove located in the flat face, and the flat face is parallel to the windward direction of the flat tube. And the heat exchanger fins are provided with flat holes, the flat holes are used for allowing the flat tubes to pass through, and at least part of the side faces of the flat holes are embedded in the mounting grooves. The utility model solves the problem of welding position deviation caused by vibration during position adjustment when the fin and the flat tube are welded while the position is adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a fin assembly of a flat tube heat exchanger and a processing device thereof. Background Art

[0002] As the greenhouse effect intensifies, how to reduce the use of fluorine-containing refrigerants to mitigate the impact of the greenhouse effect has become one of the current issues. The industry has begun to use flat tube microchannel heat exchangers composed of multiple tiny heat transfer tubes arranged and connected to reduce refrigerants and increase cooling capacity. The general characteristics of flat tube shaped microchannel heat exchangers include that the fins and flat tubes are connected by welding rather than expansion, and the welding methods include flame brazing and furnace brazing. Regardless of the welding method, the heat exchanger is fixed on the production line conveyor belt, and its position in the flame is adjusted for welding, thereby achieving large-scale batch production. However, when welding while adjusting the position, the vibration during the adjustment may cause the fins or piping components to move, ultimately causing the welding position of the components to deviate from the specified position. Once the fins move, the position of the fins and flat tubes will deviate, which will cause problems such as fin inversion and fin pitch deviation, which is a fatal defect in terms of cooling capacity. Utility Model Content

[0003] The problem solved by the utility model is that when the fins and the flat tubes are welded while adjusting their positions, the welding positions may be offset due to vibration during the position adjustment.

[0004] To solve the above problems, the present invention provides a flat tube heat exchanger fin assembly, which includes: a flat tube, wherein at least one heat exchange channel is provided in the flat tube, the flat tube is provided with a flat surface and a mounting groove located on the flat surface, and the flat surface is parallel to the windward direction of the flat tube; a heat exchanger fin, wherein the heat exchanger fin is provided with a flat hole, the flat hole is used to pass the flat tube, and the side surface of the flat hole is at least partially embedded in the mounting groove.

[0005] The technical effect achieved by adopting this technical solution is as follows: The mounting groove is used to define the position of the heat exchanger fins on the flat tubes, thereby accurately locating the installation and welding position of the heat exchanger fins, meeting the designed spacing of the heat exchanger fins, and preventing the heat exchanger fins from tilting. The side of the mounting groove clamps the side of the heat exchanger fins, eliminating the need for flanges or holes in the heat exchanger fins, which would affect air volume and drainage, and can improve the heat transfer performance of the heat exchanger fins. The flat holes are used to define the position of the flat tubes on the heat exchanger fins, so that on each side of the flat tube, the length of all heat exchanger fins extending out is fixed, avoiding uneven air volume.

[0006] Furthermore, the mounting grooves are symmetrically arranged on the flat surfaces on both sides of the flat tube; the two side surfaces of the flat hole along the windward direction are connecting surfaces, and the connecting surfaces are embedded in the corresponding mounting grooves.

[0007] The technical effect achieved by adopting this technical solution is: the flat surfaces on both sides of the flat tube are locked by the flat holes, so the flat tube is not easy to tilt relative to the heat exchanger fins, and the two can maintain a vertical installation state, which is convenient for welding.

[0008] Furthermore, the heat exchanger fin is provided with a mounting opening communicating with the flat hole, and the mounting opening can pass through the flat tube.

[0009] The technical effect achieved by adopting this technical solution is: when assembling the heat exchanger fins and flat tubes, the flat tubes can be inserted into the flat holes through the installation openings without the need for alignment or socketing, thus improving the installation efficiency.

[0010] Furthermore, the heat exchanger fins are welded to the flat tubes in the mounting grooves.

[0011] The technical effect achieved by adopting this technical solution is: the final fixation of the heat exchanger fins and the flat tubes is achieved after welding, avoiding the deviation of the heat exchanger fins.

[0012] Furthermore, the width of the mounting slot is greater than the thickness of the heat exchanger fin.

[0013] The technical effect achieved by adopting this technical solution is that the resistance when the flat tube is inserted into the heat exchanger fin can be reduced, making the insertion operation easier.

[0014] Furthermore, guide surfaces are provided on opposite sides of the mounting groove, and the guide surfaces are used to guide the heat exchanger fins.

[0015] The technical effect achieved after adopting this technical solution is: the guide surface can guide the connecting surface of the heat exchanger fin, and the ends of the connecting surface along the thickness direction of the heat exchanger fin can slide along the guide surface, thereby facilitating the fixing of the heat exchanger fin in the middle position of the mounting groove to avoid displacement after welding.

[0016] Furthermore, from the perspective of the windward side of the flat tube heat exchanger fin assembly, the edge of the slot of the mounting slot is the first point, and the edge of the connecting surface of the flat hole is the second point. The first point and the second point on each side of the slot of the mounting slot are connected to form an intersection, and the distance from the intersection to the connecting surface is greater than the distance from the bottom of the mounting slot to the connecting surface.

[0017] The technical effect achieved by adopting this technical solution is: by reducing the distance between the bottom of the mounting groove and the connection surface, the cavity generated by this distance is also smaller, so the cavity can be filled with less welding, achieving the effect of stably connecting the heat exchanger fins and the mounting groove.

[0018] Furthermore, limiting side walls are provided on opposite sides of the installation groove, and the limiting side walls are used to limit the heat exchanger fins.

[0019] The technical effect achieved after adopting this technical solution is: the limiting side wall limits the heat exchanger fins to prevent the heat exchanger fins from moving in the installation groove, thereby accurately performing welding.

[0020] The utility model provides a processing device, which is used to process the flat tube heat exchanger fin assembly provided by any of the above-mentioned technical solutions; the processing device comprises: a mold, a pressure piece and a groove processing assembly; the mold comprises a blank cavity, and a pressure opening and an extrusion port communicating with opposite sides of the blank cavity, the pressure piece is provided at the pressure opening, and the extrusion port is used to extrude a flat tube semi-finished product; the groove processing assembly is used to press out the mounting groove on the flat tube semi-finished product to form the flat tube.

[0021] The technical effect achieved after adopting this technical solution is: the blank cavity of the mold is used to inject the blank, the pressure piece applies force from the pressure opening to extrude the blank from the extrusion port. When the extrusion port is an annular opening, the tubular flat tube and the heat exchange channel inside it can be quickly extruded; the groove processing component can quickly form the installation groove through extrusion, so the processing efficiency of the flat tube is relatively high.

[0022] Furthermore, the groove processing assembly includes two gears arranged opposite to each other, and a semi-finished product channel is formed between the two gears, and the semi-finished product channel is used to pass the flat tube semi-finished product; wherein, the gear is provided with a tooth portion, and the tooth portion matches the mounting groove, and is used to press out the mounting groove on the flat tube semi-finished product to form the flat tube.

[0023] The technical effect achieved after adopting this technical solution is: the two gears can clamp the flat tube semi-finished product on the upper and lower sides to achieve directional transportation and accurate extrusion molding; the gears can extrude installation grooves on the upper and lower sides of the flat tube by rotating. According to the gap between each tooth on the gear, the spacing between adjacent installation grooves can be determined. According to the size and shape of each tooth, the size and shape of each installation groove can be determined. Therefore, the installation groove is obtained by extrusion of the gears, and its position, shape and size can have better consistency.

[0024] In summary, the above-mentioned technical solutions of the present application can have one or more of the following advantages or beneficial effects: i) the mounting groove is used to limit the position of the heat exchanger fin on the flat tube, so as to accurately locate the installation and welding position of the heat exchanger fin, meet the design spacing of the heat exchanger fin, and avoid the heat exchanger fin from flipping over; ii) the side of the mounting groove clamps the side of the heat exchanger fin, so that there is no need to set flanges or openings on the heat exchanger fin, which affects the air volume and drainage, and can improve the heat transfer performance of the heat exchanger fin; iii) the flat hole is used to limit the position of the flat tube on the heat exchanger fin, so that on each side of the flat tube, the extended length of all heat exchanger fins is fixed, avoiding uneven air volume; iv) the flat tube is extruded by a mold, which is more efficient; v) the mounting groove is obtained by extrusion through gears, which can ensure better consistency while being efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of a flat tube heat exchanger fin assembly provided by the utility model;

[0026] Figure 2 is a cross-sectional view of a fin assembly of a flat tube heat exchanger;

[0027] Figure 3 Another structural schematic diagram of a flat tube heat exchanger fin assembly;

[0028] Figure 4 This is another structural schematic diagram of a flat tube heat exchanger fin assembly;

[0029] Figure 5 This is a schematic diagram of the connection between the heat exchanger fins and the mounting slots;

[0030] Figure 6 This is a structural schematic diagram of a processing device provided by the utility model.

[0031] Description of reference numerals:

[0032] 100-flat tube heat exchanger fin assembly; 110-flat tube; 111-heat exchange channel; 112-flat surface; 114-mounting groove; 115-limiting side wall; 120-heat exchanger fin; 121-flat hole; 122-mounting opening; 200-processing device; 210-mold; 220-pressurizing part; 230-groove processing assembly. DETAILED DESCRIPTION

[0033] The purpose of the utility model is to provide a flat tube heat exchanger fin assembly and a processing device thereof, which are used to improve the fixing effect of the flat tube and the heat exchanger fin, improve the stability during welding and the thermal conductivity of the heat exchanger fin, and avoid the displacement that affects the air volume and drainage.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] See also Figures 1-4 The utility model provides a flat tube heat exchanger fin assembly 100, which includes: a flat tube 110, wherein at least one heat exchange channel 111 is provided in the flat tube 110, the flat tube 110 is provided with a flat surface 112 and a mounting groove 114 located on the flat surface 112, and the flat surface 112 is parallel to the windward direction of the flat tube 110; a heat exchanger fin 120, wherein the heat exchanger fin 120 is provided with a flat hole 121, the flat hole 121 is used for passing the flat tube 110, and the side surface of the flat hole 121 is at least partially embedded in the mounting groove 114.

[0036] In this embodiment, the mounting groove 114 is used to define the position of the heat exchanger fin 120 on the flat tube 110, thereby accurately locating the installation and welding position of the heat exchanger fin 120, meeting the designed spacing of the heat exchanger fin 120, and preventing the heat exchanger fin 120 from tilting. The side of the mounting groove 114 clamps the side of the heat exchanger fin 120, thereby eliminating the need to set flanges or openings on the heat exchanger fin 120, which would affect the air volume and drainage, and can improve the heat transfer performance of the heat exchanger fin 120. The flat hole 121 is used to define the position of the flat tube 110 on the heat exchanger fin 120, so that on each side of the flat tube 110, the extended length of all heat exchanger fins 120 is fixed, avoiding uneven air volume.

[0037] Preferably, the heat exchange channel 111 in the flat tube 110 is arranged along the width direction of the flat tube 110, thereby improving the heat exchange efficiency of the flat surface 112. The heat exchange channel 111 can be a square tube or a round tube, which is not limited here.

[0038] In a specific embodiment, the mounting grooves 114 are symmetrically arranged on the flat surfaces 112 on both sides of the flat tube 110 ; the two side surfaces of the flat hole 121 along the windward direction are connecting surfaces, and the connecting surfaces are embedded in the corresponding mounting grooves 114 .

[0039] It should be noted that the flat surfaces 112 on both sides of the flat tube 110 are locked by the flat holes 121, so the flat tube 110 is not easy to tilt relative to the heat exchanger fin 120, and the two can maintain a vertical installation state, thereby facilitating welding.

[0040] In a specific embodiment, the heat exchanger fin 120 is provided with a mounting opening 122 communicating with the flat hole 121 , and the mounting opening 122 is capable of passing through the flat tube 110 .

[0041] It should be noted that when the heat exchanger fins 120 and the flat tubes 110 are assembled, the flat tubes 110 can be inserted into the flat holes 121 through the mounting openings 122 without the need for alignment or sleeve connection, thus achieving higher installation efficiency.

[0042] In a specific embodiment, the heat exchanger fins 120 are welded to the flat tubes 110 in the mounting grooves 114 .

[0043] It should be noted that the heat exchanger fins 120 and the flat tubes 110 are finally fixed after welding to prevent the heat exchanger fins 120 from shifting.

[0044] See also Figure 5 In one specific embodiment, the slot width of the mounting slot 114 is greater than the thickness of the heat exchanger fin 120. The slot width is defined as the distance between the outer ends of the mounting slot 114. Specifically, the slot width of the mounting slot 114 is greater than the thickness t of the heat exchanger fin 120 by a distance w on each side, allowing the connection surface to be positioned within the mounting slot 114, with a distance d between the connection surface and the flat surface. Here, t, w, and d are all constants.

[0045] The wider opening of the mounting groove 114 can reduce the resistance when the flat tube 110 is inserted into the heat exchanger fin 120 , thereby facilitating the insertion operation.

[0046] In a specific embodiment, guide surfaces are provided on opposite sides of the mounting groove 114 , and the guide surfaces are used to guide the heat exchanger fins 120 .

[0047] It should be noted that the guide surface can guide the connecting surface of the heat exchanger fin 120, and the ends of the connecting surface along the thickness direction of the heat exchanger fin 120 can slide along the guide surface, thereby facilitating the fixing of the heat exchanger fin 120 in the middle position of the mounting groove 114 to avoid displacement after welding.

[0048] The guide surface can be an inclined surface or a curved surface, which is not limited here.

[0049] See also Figure 5 In a specific embodiment, from the windward side of the flat tube heat exchanger fin assembly 100, the edge of the notch of the mounting slot 114 is a first point, and the edge of the connecting surface of the flat hole 121 is a second point. Lines connecting the first and second points on each side of the notch of the mounting slot 114 form an intersection, and the distance from the intersection to the connecting surface is greater than the distance from the bottom of the mounting slot 114 to the connecting surface. Specifically, the edge of the connecting surface of the flat hole 121 is divided into two points, BC, with the intersection being A. The distance from A to the connecting surface is greater than the distance h from the bottom of the mounting slot 114 to the connecting surface. Where h is a constant.

[0050] It should be noted that by reducing the distance between the bottom of the mounting groove 114 and the connection surface, the cavity generated by this distance is also smaller, so less welding can be used to fill the cavity, thereby achieving the effect of stably connecting the heat exchanger fin 120 and the mounting groove 114.

[0051] Preferably, the mounting groove 114 may be in the shape of an inverted trapezoid or a fan, thereby reducing the distance from the bottom of the groove to the connection surface.

[0052] In a specific embodiment, limiting side walls 115 are provided on two opposite sides of the installation groove 114 , and the limiting side walls 115 are used to limit the heat exchanger fins 120 .

[0053] It should be noted that the limiting side walls 115 limit the heat exchanger fins 120 to prevent the heat exchanger fins 120 from moving in the mounting grooves 114 , thereby ensuring accurate welding.

[0054] See also Figure 6 The present invention also provides a processing device 200, which is used to process the flat tube heat exchanger fin assembly 100 provided by any of the above technical solutions; the processing device 200 includes: a mold 210, a pressure piece 220 and a groove processing assembly 230; the mold 210 includes a billet cavity, and a pressure opening and an extrusion port communicating with opposite sides of the billet cavity, the pressure piece 220 is provided at the pressure opening, and the extrusion port is used to extrude the semi-finished flat tube 110; the groove processing assembly 230 is used to press out the installation groove 114 on the semi-finished flat tube 110 to form the flat tube 110.

[0055] It should be noted that the blank cavity of the mold 210 is used to inject the blank, and the pressure member 220 applies force from the pressure opening to extrude the blank from the extrusion port. When the extrusion port is an annular opening, the tubular flat tube 110 and the heat exchange channel 111 inside it can be quickly extruded; the groove processing component 230 can quickly form the installation groove 114 by extrusion, so the processing efficiency of the flat tube 110 is relatively high.

[0056] Preferably, a block matching the heat exchange channel 111 is provided in the extrusion port, and the side of the block facing the billet cavity is an arc surface or a spherical surface, thereby guiding the extruded billet to the extrusion port, facilitating the manufacture of the flat tube 110 semi-finished product.

[0057] Preferably, the pressure member 220 is, for example, a piston-type extrusion rod, which matches the cross-section of the billet cavity, thereby sliding in the billet cavity to achieve extrusion of the billet.

[0058] In a specific embodiment, the groove processing assembly 230 includes two gears arranged opposite to each other, and a semi-finished product channel is formed between the two gears, and the semi-finished product channel is used to pass the flat tube 110 semi-finished product; wherein the gears are provided with teeth, and the teeth match the mounting groove 114, and are used to press out the mounting groove 114 on the flat tube 110 semi-finished product to form the flat tube 110.

[0059] It should be noted that the two gears can clamp the flat tube 110 semi-finished product on the upper and lower sides to achieve directional transportation and accurate extrusion molding; the gears can extrude installation grooves 114 on the upper and lower sides of the flat tube 110 by rotating. According to the gap between each tooth on the gear, the spacing between adjacent installation grooves 114 can be determined, and according to the size and shape of each tooth, the size and shape of each installation groove 114 can be determined. Therefore, the installation groove 114 is obtained by extrusion of the gears, and its position, shape and size can have better consistency.

[0060] In a specific embodiment, the processing device 200 further includes equipment for stamping the heat exchanger fins 120 , which will not be described in detail here.

[0061] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

Claims

1. A flat tube heat exchanger fin assembly, characterized in that: The flat tube heat exchanger fin assembly comprises: A flat tube (110), wherein at least one heat exchange channel (111) is provided in the flat tube (110), the flat tube (110) is provided with a flat surface (112) and a mounting groove (114) located on the flat surface (112), and the flat surface (112) is parallel to the windward direction of the flat tube (110); A heat exchanger fin (120) is provided with a flat hole (121), the flat hole (121) is used to pass the flat tube (110), and the side surface of the flat hole (121) is at least partially embedded in the installation groove (114).

2. The flat tube heat exchanger fin assembly according to claim 1, characterized in that: The mounting grooves (114) are symmetrically arranged on the flat surfaces (112) on both sides of the flat tube (110); The two side surfaces of the flat hole (121) along the windward direction are connecting surfaces, and the connecting surfaces are embedded in the corresponding mounting grooves (114).

3. The flat tube heat exchanger fin assembly according to claim 1, characterized in that: The heat exchanger fin (120) is provided with a mounting opening (122) communicating with the flat hole (121), and the mounting opening (122) is capable of passing through the flat tube (110).

4. The flat tube heat exchanger fin assembly according to claim 1, characterized in that: The heat exchanger fin (120) is welded to the flat tube (110) in the mounting groove (114).

5. The flat tube heat exchanger fin assembly according to claim 1, characterized in that: The width of the mounting groove (114) is greater than the thickness of the heat exchanger fin (120).

6. The flat tube heat exchanger fin assembly according to claim 5, characterized in that: Guide surfaces are provided on opposite sides of the installation groove (114), and the guide surfaces are used to guide the heat exchanger fins (120).

7. The flat tube heat exchanger fin assembly according to claim 2, characterized in that: From the perspective of the windward side of the flat tube heat exchanger fin assembly, the edge of the slot of the mounting slot (114) is the first point, and the edge of the connecting surface of the flat hole (121) is the second point. The first point and the second point on each side of the slot of the mounting slot (114) are connected to form an intersection, and the distance from the intersection to the connecting surface is greater than the distance from the bottom of the mounting slot (114) to the connecting surface.

8. The flat tube heat exchanger fin assembly according to claim 1, characterized in that: Limiting side walls (115) are provided on opposite sides of the installation groove (114), and the limiting side walls (115) are used to limit the heat exchanger fins (120).

9. A processing device, characterized in that: The processing device is used for processing the flat tube heat exchanger fin assembly according to any one of claims 1 to 8; the processing device (200) comprises: a mold (210), a pressurizing member (220) and a groove processing assembly (230); The mold (210) comprises a blank cavity, and a pressurizing opening and an extrusion port communicating with opposite sides of the blank cavity; the pressurizing member (220) is provided at the pressurizing opening; and the extrusion port is used to extrude a semi-finished flat tube (110); The groove processing assembly (230) is used to press out the installation groove (114) on the semi-finished flat tube (110) to form the flat tube (110).

10. The processing device according to claim 9, characterized in that The groove processing assembly (230) comprises two gears arranged opposite to each other, a semi-finished product channel being formed between the two gears, the semi-finished product channel being used to pass the semi-finished product of the flat tube (110); The gear is provided with a tooth portion, the tooth portion matches the mounting groove (114), and is used to press out the mounting groove (114) on the flat tube (110) semi-finished product to form the flat tube (110).

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