Fin heat exchanger for air conditioning system

Abstract

The utility model relates to a fin type heat exchanger for an air conditioning system, which is applied to the field of heat exchangers and comprises an outer frame, the outer frame comprises a [-shaped frame and a movable assembly plate, and a connecting part is arranged between the movable assembly plate and the [-shaped frame; a plurality of assembly kidney-shaped holes are formed in the movable assembly plate and are arranged at intervals in the length direction of the movable assembly plate, and a plurality of groups of assembly round holes are formed in a plate body, opposite to the movable assembly plate, of the n-shaped frame; the heat exchange pipe comprises a plurality of U-shaped pipe fittings, each U-shaped pipe fitting is composed of two straight-section pipe fittings and a U-shaped elbow, fins are wound on the surfaces of the straight-section pipe fittings, the U-shaped elbows are connected with the two straight-section pipe fittings, the U-shaped elbows penetrate through the assembly kidney-shaped holes, and the two straight-section pipe fittings penetrate through the corresponding assembly round holes respectively; and the pipe fitting fixing plate is arranged on the movable assembly plate and penetrates through the U-shaped elbows, and a fixing part is arranged between the pipe fitting fixing plate and the movable assembly plate. According to the fin type heat exchanger for the air conditioning system, the heat exchange pipes and the outer frame can be assembled, the assembling operation is simple, and implementation is easy.

Description

Technical Field

[0001] The present application relates to the field of heat exchangers, and in particular to a finned heat exchanger for an air conditioning system. Background Art

[0002] A heat exchanger is an important component in an air conditioning system. Its main function is, in the case of refrigeration and heating, through the forced action of an air conditioning fan, to allow natural air to pass through the heat exchanger and exchange heat with the heat exchange medium in the heat exchange tubes, so that the heat of the heat exchange medium is transferred, and finally the indoor temperature is controlled.

[0003] The heat exchanger mainly consists of an outer frame and U-shaped heat exchange tubes with fins arranged in the outer frame. The fins arranged on the heat exchange tubes can effectively increase the heat exchange area and achieve the purpose of improving the heat exchange efficiency. For example, a finned heat exchanger disclosed in Chinese Patent with the application number CN202222561326.4 has a serpentine heat exchange tube formed by connecting multiple U-shaped tubes in series at the head and tail inside the heat exchanger. One end of the heat exchange tube extends outside the frame to be a heat exchange medium inlet, and the other end also extends outside the frame to be a heat exchange medium outlet.

[0004] However, when actually assembling the outer frame and the heat exchange tubes of this heat exchanger, there are defects in difficult assembly operations. The problem is that a single U-shaped tube wound with fins is difficult to install into the outer frame, and the U-shaped elbows connected in series between adjacent U-shaped tubes need to be welded after the outer frame and the heat exchange tubes are assembled, which will increase the difficulty of the welding operation. Summary of the Utility Model

[0005] In order to improve the defects of the heat exchanger in the above-mentioned prior art, the present application provides a finned heat exchanger for an air conditioning system.

[0006] A finned heat exchanger for an air conditioning system provided by the present application adopts the following technical solutions:

[0007] A finned heat exchanger for an air conditioning system, comprising:

[0008] An outer frame, the outer frame includes a C-shaped frame and a movable assembly plate, a connecting component is arranged between the movable assembly plate and the C-shaped frame, and the movable assembly plate and the C-shaped frame can be fixed through the connecting component; a plurality of assembly waist-shaped holes are arranged on the movable assembly plate, and the plurality of assembly waist-shaped holes are arranged at intervals along the length direction of the movable assembly plate. On the plate body of the C-shaped frame opposite to the movable assembly plate, multiple groups of assembly round holes are arranged, each group of assembly round holes is arranged corresponding to one of the assembly waist-shaped holes, and the number of assembly round holes in each group of assembly round holes is two;

[0009] Heat exchange tubes, the heat exchange tubes include a plurality of U-shaped pipe fittings, the U-shaped pipe fittings are composed of two straight pipe fittings with fins wound on the surface and a U-shaped elbow connecting the two straight pipe fittings, the U-shaped elbow can pass through the movable assembly plate via the assembled waist-shaped holes, and the two straight pipe fittings can respectively pass through a corresponding set of assembled round holes. Among them, one end of the U-shaped pipe fitting is set as the heat exchange medium inlet, and the other end is set as the heat exchange medium outlet;

[0010] Pipe fitting fixing plate, the pipe fitting fixing plate is arranged on the movable assembly plate and passes through the inside of each U-shaped elbow. A fixing component is arranged between the pipe fitting fixing plate and the movable assembly plate, and the pipe fitting fixing plate and the movable assembly plate can be fixed through the fixing component.

[0011] By adopting the above technical solution, for the finned heat exchanger for an air-conditioning system of the present application, the heat exchange tubes can be first installed with the U-shaped frame and the movable assembly plate respectively, and then the U-shaped frame and the movable assembly plate are assembled to form the outer frame, thereby forming the above heat exchanger. Therefore, the heat exchange tubes composed of a plurality of U-shaped pipe fittings and the outer frame of the present application can be assembled, and the assembly operation is relatively simple and easy to implement.

[0012] Optionally, one connecting component is arranged at each of the two ends of the movable assembly plate in the length direction. The connecting component includes a right-angle plate part and a connecting bolt. The right-angle plate part is embedded between the movable assembly plate and the U-shaped frame. A part of the connecting bolts fixes a right-angle folded edge of the right-angle plate part and the movable assembly plate, and another part of the connecting bolts fixes the other right-angle folded edge of the right-angle plate part and the U-shaped frame.

[0013] By adopting the above technical solution, after the heat exchange tubes composed of a plurality of U-shaped pipe fittings are respectively installed with the U-shaped frame and the movable assembly plate, the U-shaped frame and the movable assembly plate are assembled to form the outer frame, and the U-shaped frame and the movable assembly plate are fixed by the connecting component composed of the right-angle plate part and the connecting bolt. The fixing effect is not only good but also the operation is relatively convenient.

[0014] Optionally, one fixing component is arranged at each of the two ends of the pipe fitting fixing plate in the length direction. The fixing component includes a strip-shaped plate part and a fixing bolt. The strip-shaped plate part is arranged on the pipe fitting fixing plate and presses the pipe fitting fixing plate. Both ends of the strip-shaped plate part extend out of the pipe fitting fixing plate. One of the fixing bolts fixes one end of the strip-shaped plate part and the movable assembly plate, and the other fixing bolt fixes the other end of the strip-shaped plate part and the movable assembly plate.

[0015] By adopting the above technical solution, after the heat exchange tubes and the outer frame are assembled, the heat exchange tubes can be further fixed through the fixing component composed of the strip-shaped plate part and the fixing bolt in cooperation with the pipe fitting fixing plate, thereby improving the structural stability of the heat exchange tubes and the entire heat exchanger.

[0016] Optionally, the pipe fitting fixing plate contacts the inner ring of the U-shaped elbow, and the outer ring of the U-shaped elbow contacts the hole walls at both ends of the assembled waist-shaped hole. Among them, the contact part between the pipe fitting fixing plate and the inner ring of the U-shaped elbow is fixed by spot welding, and the contact part between the outer ring of the U-shaped elbow and the hole wall of the assembled waist-shaped hole is fixed by spot welding.

[0017] By adopting the above technical solution, the heat exchange pipes can be fixed and the stability of the heat exchange pipes in the outer frame can be improved, preventing the heat exchange pipes from shaking in the outer frame and affecting the normal use of the heat exchanger.

[0018] Optionally, the straight pipe fitting contacts the hole wall of the assembled round hole. Among them, the contact part between the straight pipe fitting and the hole wall of the assembled round hole is fixed by spot welding.

[0019] By adopting the above technical solution, the heat exchange pipes can also be fixed and the stability of the heat exchange pipes in the outer frame can be improved.

[0020] Optionally, each of the assembled waist-shaped holes is inclined and the inclination angles of each of the assembled waist-shaped holes are the same. The two assembled round holes in each group of the assembled round holes are also inclined relative to each other, so that the U-shaped pipe fitting can be inclined in the outer frame.

[0021] By adopting the above technical solution, the U-shaped pipe fittings are all inclined in the outer frame, so that the straight pipe fittings wound with fins are staggered with each other in the outer frame, so that the heat exchange pipes can fully contact with natural wind and improve the heat exchange efficiency of the heat exchanger of the present application.

[0022] Optionally, it further includes a heat exchange medium inlet integrated pipe and a heat exchange medium outlet integrated pipe. The heat exchange medium inlet integrated pipe connects the heat exchange medium inlets of each U-shaped pipe fitting, and the heat exchange medium outlet integrated pipe connects the heat exchange medium outlets of each U-shaped pipe fitting. Among them, a heat exchange medium total inlet is provided on the heat exchange medium inlet integrated pipe, and a heat exchange medium total outlet is provided on the heat exchange medium outlet integrated pipe.

[0023] By adopting the above technical solution, after the heat exchange medium enters the heat exchange medium inlet integrated pipe centrally, it is dispersed into each U-shaped pipe fitting and flows through each U-shaped pipe fitting, and finally converges into the heat exchange medium outlet integrated pipe. By arranging the heat exchange medium inlet integrated pipe and the heat exchange medium outlet integrated pipe in this way, the purpose of simplifying the structure of the heat exchanger of the present application can be achieved.

[0024] Optionally, support and reinforcement pieces are provided between the heat exchange medium inlet integrated pipe and the C-shaped frame and between the heat exchange medium outlet integrated pipe and the C-shaped frame.

[0025] By adopting the above technical solution, the purpose of setting the support and reinforcement piece is to stabilize the heat exchange medium inlet integrated pipe and the heat exchange medium outlet integrated pipe, and increase the structural stability of the two.

[0026] In summary, the present application includes the following beneficial technical effects:

[0027] 1. For the finned heat exchanger for an air conditioning system of the present application, the heat exchange pipes can be first installed with the U-shaped frame and the movable assembly plate respectively, and then the U-shaped frame and the movable assembly plate are assembled to form the outer frame, so as to form the above heat exchanger. Therefore, the heat exchange pipes composed of multiple U-shaped pipe fittings and the outer frame of the present application can be assembled, and the assembly operation is relatively simple and easy to implement.

[0028] 2. The U-shaped pipe fittings are all inclined in the outer frame, so that the straight pipe sections wound with fins are staggered with each other in the outer frame, so that the heat exchange pipes can fully contact with the natural wind, and the heat exchange efficiency of the heat exchanger of the present application is improved.

[0029] 3. After the heat exchange medium enters the heat exchange medium inlet integrated pipe centrally, it is dispersed into each U-shaped pipe fitting and flows through each U-shaped pipe fitting, and finally converges into the heat exchange medium outlet integrated pipe. By setting the heat exchange medium inlet integrated pipe and the heat exchange medium outlet integrated pipe in this way, the purpose of simplifying the structure of the heat exchanger of the present application can be achieved. Description of the Drawings

[0030] Figure 1 It is a three-dimensional structure diagram of the finned heat exchanger for an air conditioning system in an embodiment of the present application.

[0031] Figure 2 It is a three-dimensional structure diagram of the outer frame assembled by the U-shaped frame and the movable assembly plate in an embodiment of the present application.

[0032] Figure 3 It is a three-dimensional structure diagram of another perspective of the finned heat exchanger for an air conditioning system in an embodiment of the present application.

[0033] Figure 4 It is a structural schematic diagram of the heat exchange medium inlet integrated pipe and the heat exchange medium outlet integrated pipe in an embodiment of the present application.

[0034] Reference numerals: 1. Outer frame; 11. U-shaped frame; 111. Assembly round hole; 12. Movable assembly plate; 121. Assembly waist-shaped hole; 2. Connecting member; 21. Right-angle plate member; 22. Connecting bolt; 3. Heat exchange pipe; 4. Pipe fitting fixing plate; 5. Fixing member; 51. Strip-shaped plate member; 52. Fixing bolt; 6. Heat exchange medium inlet integrated pipe; 61. Total heat exchange medium inlet; 7. Heat exchange medium outlet integrated pipe; 71. Total heat exchange medium outlet; 8. Support and reinforcement piece. Detailed Embodiment

[0035] The following further elaborates on this application in conjunction with the appended Figure 1-4 drawings for a more detailed description.

[0036] An embodiment of this application discloses a fin heat exchanger for an air conditioning system. Referring to Figure 1 , the fin heat exchanger for the air conditioning system includes an outer frame 1 and heat exchange tubes 3. Among them, the outer frame 1 includes a U-shaped frame 11 and a movable assembly plate 12. The movable assembly plate 12 is arranged at the opening of the U-shaped frame 11 and can form a closed outer frame 1 with a rectangular shape on all four sides. The movable assembly plate 12 and the U-shaped frame 11 are connected and fixed by a pair of connecting components 2. Among the pair of connecting components 2, one connecting component 2 is arranged at one end of the movable assembly plate 12 in the length direction, and the other connecting component 2 is arranged at the other end of the movable assembly plate 12 in the length direction. And in conjunction with Figure 2 , the connecting component 2 includes a right-angle plate member 21 and connecting bolts 22. Each right-angle plate member 21 is configured with at least four connecting bolts 22 (in this application, each right-angle plate member 21 is configured with four connecting bolts 22 as an example). The right-angle plate member 21 is embedded between the movable assembly plate 12 and the U-shaped frame 11. Specifically, one right-angle fold edge of the right-angle plate member 21 is in contact with the movable assembly plate 12 and is fixed by two of the connecting bolts 22, and the other right-angle fold edge of the right-angle plate member 21 is in contact with the U-shaped frame 11 and is fixed by the other two connecting bolts 22.

[0037] A plurality of assembly waist-shaped holes 121 are provided on the movable assembly plate 12. The plurality of assembly waist-shaped holes 121 are arranged at equal intervals along the length direction of the movable assembly plate 12 and the plurality of assembly waist-shaped holes 121 have the same inclination. On the plate body of the U-shaped frame 11 opposite to the movable assembly plate 12, multiple groups of assembly round holes 111 are provided. Each group of assembly round holes 111 is arranged corresponding to one assembly waist-shaped hole 121, and the number of assembly round holes 111 in each group of assembly round holes 111 is two. Here, it should be noted that the two assembly round holes 111 in each group of assembly round holes 111 are also inclined to each other and the inclination is the same as that of the assembly waist-shaped hole 121.

[0038] Referring to Figure 3, the heat exchange tube 3 includes a plurality of U-shaped pipe fittings. The U-shaped pipe fittings are composed of two straight pipe fittings with fins wound on the surface and a U-shaped elbow connecting the two straight pipe fittings. No fins are wound at the U-shaped elbow. It should be noted here that the U-shaped pipe fittings are actually formed by bending the pipe fittings from the middle by a pipe bender, and the bent part is the U-shaped elbow. When assembling the heat exchanger of the present application, the heat exchange tube 3 is first installed with the C-shaped frame 11 and the movable assembly plate 12 respectively, that is, a plurality of U-shaped pipe fittings are installed with the C-shaped frame 11 and the movable assembly plate 12 one by one. Specifically here, the U-shaped elbow of the U-shaped pipe fitting is passed through the assembly waist-shaped hole 121. The outer circles at both ends of the U-shaped elbow just contact the hole walls at both ends of the assembly waist-shaped hole 121, and the two straight pipe fittings of the U-shaped pipe fitting are respectively passed through two of the corresponding set of assembly round holes 111 in the assembly round holes 111. The outer wall of the straight pipe fitting just contacts the hole wall of the assembly round hole 111. Then, the movable assembly plate 12 and the C-shaped frame 11 are assembled and fixed by the connecting member 2 composed of the right-angle plate member 21 and the connecting bolt 22 to form the outer frame 1.

[0039] It should be emphasized here that since both the assembly waist-shaped hole 121 and the assembly round hole 111 are inclined, the U-shaped pipe fitting, that is, the heat exchange tube 3, is inclined in the outer frame 1, so that the straight pipe fittings with fins wound on them are staggered with each other in the outer frame 1, so that the heat exchange tube 3 can fully contact with the natural wind and improve the heat exchange efficiency of the heat exchanger of the present application.

[0040] After the heat exchanger is assembled and formed, both ends of the U-shaped pipe fitting, that is, the inlet and the outlet, extend outside the outer frame 1. Therefore, one end of the U-shaped pipe fitting is set as the heat exchange medium inlet, and the other end is set as the heat exchange medium outlet. Among them, the heat exchange medium inlets of the U-shaped pipe fittings are arranged in one row, and the heat exchange medium outlets of the U-shaped pipe fittings are arranged in another row.

[0041] Refer to Figure 3The fin heat exchanger for the air conditioning system of the present application also includes a pipe fixing plate 4, which is arranged on the movable assembly plate 12 and passes through each U-shaped elbow, and the two side edges of the pipe fixing plate 4 are in contact with the inner rings of the two ends of the U-shaped elbow. The pipe fixing plate 4 and the movable assembly plate 12 are connected and fixed by a pair of fixing components 5, in which one fixing component 5 is arranged at one end of the length direction of the pipe fixing plate 4, and the other fixing component 5 is arranged at the other end of the length direction of the pipe fixing plate 4. The fixing component 5 includes a strip plate 51 and a fixing bolt 52, wherein each strip plate 51 is configured with two fixing bolts 52, the strip plate 51 is arranged on the pipe fixing plate 4 and presses the pipe fixing plate 4, and both ends of the strip plate 51 extend out of the pipe fixing plate 4, wherein one fixing bolt 52 fixes one end of the strip plate 51 to the movable assembly plate 12, and the other fixing bolt 52 fixes the other end of the strip plate 51 to the movable assembly plate 12. In this way, both ends of the tube fixing plate 4 are fixed, that is, the tube fixing plate 4 is fixed. The role of the tube fixing plate 4 is to limit and fix the heat exchange tube 3 and to close each assembly waist-shaped hole 121 to prevent the natural wind passing through the heat exchanger during use from leaking out from each assembly waist-shaped hole 121.

[0042] Reference Figure 3 Considering that the fixing effect of the heat exchange tube 3 relying solely on the tube fixing plate 4 is limited and the heat exchange tube 3 is still likely to shake and become unstable in the outer frame 1, the contact portion between the tube fixing plate 4 and the inner ring of the U-shaped elbow can be spot welded and fixed, the contact portion between the outer ring of the U-shaped elbow and the wall of the assembled waist-shaped hole 121 can be spot welded and fixed, and the contact portion between the straight section tube and the wall of the assembled circular hole 111 can be spot welded and fixed.

[0043] Reference Figure 3 and Figure 4 The fin heat exchanger for the air-conditioning system of the present application also includes a heat exchange medium inlet integrated pipe 6 and a heat exchange medium outlet integrated pipe 7. The heat exchange medium inlet integrated pipe 6 is connected to the heat exchange medium inlet of each U-shaped pipe fitting, and the heat exchange medium outlet integrated pipe 7 is connected to the heat exchange medium outlet of each U-shaped pipe fitting. A heat exchange medium total inlet 61 is provided on the heat exchange medium inlet integrated pipe 6, and a heat exchange medium total outlet 71 is provided on the heat exchange medium outlet integrated pipe 7. Therefore, when the heat exchanger of the present application is in operation, the heat exchange medium enters the heat exchange medium inlet integrated pipe 6 in a concentrated manner, and then is dispersed into each U-shaped pipe fitting and flows through each U-shaped pipe fitting, and finally converges into the heat exchange medium outlet integrated pipe 7. The heat exchange medium inlet integrated pipe 6 and the heat exchange medium outlet integrated pipe 7 are arranged in this way, which can achieve the purpose of simplifying the structure of the heat exchanger of the present application. And combined with Figure 1, secondly, support and reinforcement pieces 8 can be provided between the heat exchange medium inlet integrated pipe 6 and the C-shaped frame 11 and between the heat exchange medium outlet integrated pipe 7 and the C-shaped frame 11 respectively, so as to be used for stabilizing the heat exchange medium inlet integrated pipe 6 and the heat exchange medium outlet integrated pipe 7.

[0044] The implementation principle of the fin heat exchanger for an air conditioning system in an embodiment of the present application is as follows: When assembling the heat exchanger of the present application, the heat exchange tubes 3 are first installed with the C-shaped frame 11 and the movable assembly plate 12 respectively, that is, a plurality of U-shaped pipe fittings are installed with the C-shaped frame 11 and the movable assembly plate 12 one by one. Specifically here, the U-shaped elbows of the U-shaped pipe fittings are passed through the assembly waist-shaped holes 121, and the two straight pipe sections of the U-shaped pipe fittings are respectively passed through two of the corresponding set of assembly round holes 111 in the assembly round holes 111, and then the movable assembly plate 12 and the C-shaped frame 11 are assembled and fixed through the connecting member 2 composed of the right-angle plate member 21 and the connecting bolt 22, so as to form the outer frame 1, and then the two ends of the pipe fitting fixing plate 4 are fixed by the fixing member 5, that is, the pipe fitting fixing plate 4 is fixed. The heat exchange tubes 3 composed of a plurality of U-shaped pipe fittings and the outer frame 1 in the present application can be assembled and the assembly operation is relatively simple and easy to implement.

[0045] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A fin heat exchanger for an air conditioning system, characterized in that: Including: An outer frame (1), the outer frame (1) includes a C-shaped frame (11) and a movable assembly plate (12), a connecting component (2) is arranged between the movable assembly plate (12) and the C-shaped frame (11), and the movable assembly plate (12) and the C-shaped frame (11) can be fixed through the connecting component (2); a plurality of assembly waist-shaped holes (121) are arranged on the movable assembly plate (12), and the plurality of assembly waist-shaped holes (121) are arranged at intervals along the length direction of the movable assembly plate (12), and a plurality of groups of assembly round holes (111) are arranged on the plate body of the C-shaped frame (11) opposite to the movable assembly plate (12), each group of the assembly round holes (111) is arranged corresponding to one of the assembly waist-shaped holes (121), and the number of the assembly round holes (111) in each group of the assembly round holes (111) is two; A heat exchange tube (3), the heat exchange tube (3) includes a plurality of U-shaped pipe fittings, the U-shaped pipe fittings are composed of two straight pipe fittings with fins wound on the surfaces and a U-shaped elbow connecting the two straight pipe fittings, the U-shaped elbow can pass through the movable assembly plate (12) via the assembly waist-shaped hole (121), and the two straight pipe fittings can respectively pass through a corresponding group of assembly round holes (111), wherein one end of the U-shaped pipe fitting is set as a heat exchange medium inlet, and the other end is set as a heat exchange medium outlet; A pipe fitting fixing plate (4), the pipe fitting fixing plate (4) is arranged on the movable assembly plate (12) and passes through each U-shaped elbow, and a fixing component (5) is arranged between the pipe fitting fixing plate (4) and the movable assembly plate (12), and the pipe fitting fixing plate (4) and the movable assembly plate (12) can be fixed through the fixing component (5).

2. The fin heat exchanger for an air conditioning system according to claim 1, characterized in that: One connecting component (2) is arranged at each of the two ends of the movable assembly plate (12) in the length direction, the connecting component (2) includes a right-angle plate member (21) and a connecting bolt (22), the right-angle plate member (21) is embedded between the movable assembly plate (12) and the C-shaped frame (11), a part of the connecting bolts (22) fixes a right-angle folded edge of the right-angle plate member (21) and the movable assembly plate (12), and the other part of the connecting bolts (22) fixes the other right-angle folded edge of the right-angle plate member (21) and the C-shaped frame (11).

3. The fin heat exchanger for an air conditioning system according to claim 1, characterized in that: One fixing component (5) is arranged at each of the two ends of the pipe fitting fixing plate (4) in the length direction, the fixing component (5) includes a strip-shaped plate member (51) and a fixing bolt (52), the strip-shaped plate member (51) is arranged on the pipe fitting fixing plate (4) and presses the pipe fitting fixing plate (4), both ends of the strip-shaped plate member (51) extend out of the pipe fitting fixing plate (4), one of the fixing bolts (52) fixes one end of the strip-shaped plate member (51) and the movable assembly plate (12), and the other fixing bolt (52) fixes the other end of the strip-shaped plate member (51) and the movable assembly plate (12).

4. The fin heat exchanger for an air conditioning system according to claim 1, characterized in that: The pipe fitting fixing plate (4) contacts the inner ring of the U-shaped elbow, and the outer ring of the U-shaped elbow contacts the hole walls at both ends of the assembled waist-shaped hole (121). Among them, the contact part between the pipe fitting fixing plate (4) and the inner ring of the U-shaped elbow is fixed by spot welding, and the contact part between the outer ring of the U-shaped elbow and the hole wall of the assembled waist-shaped hole (121) is fixed by spot welding.

5. The fin heat exchanger for an air conditioning system according to claim 1, characterized in that: The straight pipe fitting contacts the hole wall of the assembled round hole (111). Among them, the contact part between the straight pipe fitting and the hole wall of the assembled round hole (111) is fixed by spot welding.

6. The fin heat exchanger for an air conditioning system according to claim 1, characterized in that: Each of the assembled waist-shaped holes (121) is inclined, and the inclination angles of each of the assembled waist-shaped holes (121) are the same. The two assembled round holes (111) in each group of the assembled round holes (111) are also inclined to each other, so that the U-shaped pipe fitting can be inclined and arranged in the outer frame (1).

7. The fin heat exchanger for an air conditioning system according to claim 1, characterized in that: It further includes a heat exchange medium inlet integrated pipe (6) and a heat exchange medium outlet integrated pipe (7). The heat exchange medium inlet integrated pipe (6) connects the heat exchange medium inlets of each U-shaped pipe fitting, and the heat exchange medium outlet integrated pipe (7) connects the heat exchange medium outlets of each U-shaped pipe fitting. Among them, a total heat exchange medium inlet (61) is provided on the heat exchange medium inlet integrated pipe (6), and a total heat exchange medium outlet (71) is provided on the heat exchange medium outlet integrated pipe (7).

8. The fin heat exchanger for an air conditioning system according to claim 7, characterized in that: Support reinforcement sheets (8) are provided between the heat exchange medium inlet integrated pipe (6) and the C-shaped frame (11) and between the heat exchange medium outlet integrated pipe (7) and the C-shaped frame (11).

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