Brazing device for evaporator core

Abstract

The invention discloses a brazing device for an evaporator core, and relates to the technical field of evaporator machining. The device comprises a welding table, a high-frequency welding machine case is arranged on the upper surface of the welding table, an equipment frame is fixedly installed at the bottom of the high-frequency welding machine case, and one end of the equipment frame is fixedly connected with the upper surface of the welding table; according to the device, through cooperation of the clamping mechanism and the welding adjusting mechanism, the evaporator core body is fixed in the U-shaped bracket through the clamping mechanism, the vertical, transverse and longitudinal horizontal positions of the induction heating gun are adjusted through the welding adjusting mechanism, and brazing welding machining of the sleeving positions of the multiple U-shaped connector pipes and the multiple circulating aluminum pipes is completed one by one; and therefore, automatic brazing machining of the multiple U-shaped connector pipes and the multiple circulating aluminum pipes is conveniently achieved, the convenience of brazing machining of the evaporator core body is effectively improved, and the brazing machining efficiency of the evaporator core body is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of evaporator processing, in particular to a brazing device for an evaporator core. Background Art

[0002] The evaporator is an object that converts liquid substances into gaseous substances. The evaporator is a very important component among the four major refrigeration components. The low-temperature condensed liquid passes through the evaporator to exchange heat with the outside air, gasify and absorb heat to achieve the refrigeration effect. The evaporator is mainly composed of a heating chamber and an evaporation chamber. The heating chamber provides the heat required for evaporation to the liquid, causing the liquid to boil and vaporize, and the evaporation chamber completely separates the gas and liquid phases. When welding the evaporator used in the car, a high-frequency welding machine is mostly used to heat and weld the joint pipe on the evaporator to melt the applied brazing material, thereby realizing the brazing process. However, the existing technology still has some defects in the welding process: In the existing technology, when brazing and welding the joint pipes on the evaporator, most of them are completed manually by operators. Due to the large number of joint pipes on the evaporator, the brazing and welding of the evaporator is inconvenient and the efficiency of the brazing and welding is low; In view of the above problems, the inventor proposes a brazing device for an evaporator core to solve the above problems. Summary of the invention

[0003] In order to solve the problem of inconvenient and low efficiency of brazing welding of evaporator, the purpose of the present invention is to provide a brazing device for evaporator core.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a brazing device for an evaporator core, comprising a welding table, a high-frequency welding machine chassis is arranged on the upper surface of the welding table, an equipment frame is fixedly installed on the bottom of the high-frequency welding machine chassis, one end of the equipment frame is fixedly connected to the upper surface of the welding table, one side of the high-frequency welding machine chassis is connected to an induction heating gun through a cable, and four U-shaped brackets are arranged on the upper surface of the welding table, and the four U-shaped brackets are distributed in a ring array; A welding adjustment mechanism is provided between the equipment frame and the induction heating gun, a clamping mechanism is provided in the U-shaped bracket, and a rotating mechanism is provided between the welding table and the U-shaped bracket.

[0005] Preferably, the welding adjustment mechanism includes a return frame, one end of the return frame is fixedly mounted on the equipment frame, a movable seat is slidably provided inside the return frame, an adjusting cylinder is fixedly mounted on the upper surface of the movable seat, a first connecting plate is fixedly mounted on the piston end of the adjusting cylinder, a second connecting plate is fixedly mounted on one end of the first connecting plate, a pushing cylinder is fixedly mounted on the upper surface of the second connecting plate, a connecting frame is fixedly mounted on the piston end of the pushing cylinder, and one end of the connecting frame is fixedly connected to the gun body of the induction heating gun.

[0006] Preferably, a first motor is fixedly mounted on one end of the return frame, a lead screw is fixedly mounted on a driving output end of the first motor, the lead screw is rotationally connected to the return frame, and the lead screw is threadedly rotationally connected to the moving seat.

[0007] Preferably, the side wall of the roll frame is provided with two first guide grooves, one end of each of the two first guide grooves is slidably mounted with a first guide block, the opposite sides of the two first guide blocks are fixedly mounted with a connecting rod, and the opposite ends of the two connecting rods are fixedly connected to the side of the movable seat.

[0008] Preferably, a second guide groove is formed on the upper surface of the second connecting plate, a second guide block is slidably mounted on one end of the second guide groove, and the other end of the connecting frame is fixedly connected to the upper surface of the second guide block.

[0009] Preferably, the clamping mechanism includes four placement tables, one of which is arranged in a U-shaped bracket, two clamping cylinders are fixedly mounted on the upper surfaces of the four placement tables, and a U-shaped limiting plate is fixedly mounted on the piston end of the clamping cylinder.

[0010] Preferably, two lifting cylinders are fixedly mounted on the bottom walls of the four U-shaped brackets, wherein the piston ends of two adjacent lifting cylinders are fixedly connected to the lower surface of a placement table.

[0011] Preferably, two slide rails are fixedly mounted on both ends of the four U-shaped brackets, a slider is slidably mounted on one end of the slide rail, and the slider is fixedly connected to one end of the placement table.

[0012] Preferably, the rotating mechanism includes a cross, the lower surface of the cross is in movable contact with the upper surface of the welding table, the upper surface of the cross is fixedly connected to the lower surfaces of four U-shaped brackets, a rotating shaft is rotatably installed on the welding table, one end of the rotating shaft is fixedly connected to the center position of the cross, and a driven gear is fixedly installed on the other end of the rotating shaft.

[0013] Preferably, a second motor is fixedly mounted on the lower surface of the welding table, a rotating rod is fixedly mounted on the driving output end of the second motor, one end of the rotating rod is rotatably connected to the lower surface of the welding table, a driving gear is fixedly mounted on the other end of the rotating rod, and the driving gear is meshingly connected to the driven gear.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, through the cooperation of the clamping mechanism and the welding adjustment mechanism, the clamping mechanism fixes the evaporator core body in the U-shaped bracket, and the welding adjustment mechanism adjusts the vertical, horizontal and longitudinal horizontal positions of the induction heating gun, and completes the brazing welding processing of the sleeve joints of multiple U-shaped joint tubes and multiple circulation aluminum tubes one by one, thereby conveniently realizing the automatic brazing welding processing of multiple U-shaped joint tubes and multiple circulation aluminum tubes, thereby effectively improving the convenience of the brazing welding processing of the evaporator core body, and effectively improving the brazing welding processing efficiency of the evaporator core body; 2. In the present invention, the four U-shaped brackets and the evaporator core body are driven to revolve in a circle by a rotating mechanism, so that the evaporator core body that has been brazed and welded is staggered with the induction heating gun, and the evaporator core body that has not been brazed and welded is rotated to the bottom of the induction heating gun to facilitate the brazing and welding process again, thereby conveniently achieving the correspondence or staggering of the evaporator core body and the induction heating gun, and providing other three operating stations for operators to assemble the evaporator core body, or remove the evaporator core body that has been brazed and welded, further improving the brazing and welding efficiency of the evaporator core body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The figure is a schematic diagram of the overall structure of a brazing device for an evaporator core according to the present invention.

[0017] Figure 2 It is a schematic diagram of the connection structure between the induction heating gun and the welding adjustment mechanism of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the welding adjustment mechanism of the present invention.

[0019] Figure 4 It is a schematic diagram of the connection structure between the clamping mechanism and the rotating mechanism and the U-shaped bracket of the present invention.

[0020] Figure 5 It is a schematic diagram of the assembly structure of the evaporator core body according to an embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of the sleeve connection between the induction heating gun and the U-shaped joint pipe according to an embodiment of the present invention.

[0022] In the figure: 1, welding table; 2, high frequency welding machine chassis; 21, equipment frame; 22, induction heating gun; 23, U-shaped bracket; 3, welding adjustment mechanism; 31, return frame; 32, moving seat; 33, adjusting cylinder; 34, first connecting plate; 35, second connecting plate; 36, pushing cylinder; 37, connecting frame; 38, first motor; 39, lead screw; 4, first guide groove; 41, first guide block; 42, connecting rod; 43, first Second guide groove; 44, second guide block; 5, clamping mechanism; 51, placement table; 52, clamping cylinder; 53, U-shaped limit plate; 54, lifting cylinder; 55, slide rail; 56, slider; 6, rotating mechanism; 61, cross; 62, rotating shaft; 63, driven gear; 64, second motor; 65, rotating rod; 66, driving gear; 100, evaporator core body; 200, circulating aluminum tube; 300, U-shaped joint tube. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example: Figure 1-6 As shown, the present invention provides a brazing device for an evaporator core, comprising a welding table 1, a high-frequency welding machine chassis 2 is arranged on the upper surface of the welding table 1, a device frame 21 is fixedly installed on the bottom of the high-frequency welding machine chassis 2, one end of the device frame 21 is fixedly connected to the upper surface of the welding table 1, one side of the high-frequency welding machine chassis 2 is connected to an induction heating gun 22 through a cable, four U-shaped brackets 23 are arranged on the upper surface of the welding table 1, and the four U-shaped brackets 23 are distributed in a ring array. When the evaporator core body 100 is placed on the U-shaped bracket 23 After the inside of the induction heating gun 22 is inserted into the end of the circulating aluminum tube 200 during the brazing operation, the U-shaped joint tube 300 is inserted into the end of the circulating aluminum tube 200, and the brazing material for brazing is applied to the joint between the U-shaped joint tube 300 and the circulating aluminum tube 200 (the melting point of the brazing material is lower than the melting points of the U-shaped joint tube 300 and the circulating aluminum tube 200). When the high-frequency welding machine chassis 2 is operating, the heating tube at the front end of the induction heating gun 22 is rapidly heated through the cable. When the heating tube at the front end of the induction heating gun 22 is sleeved on the sleeve joint of the U-shaped joint tube 300 and the circulating aluminum tube 200 (reference Figure 6 ), the solder can be melted by the heated heating tube, thereby achieving the brazing welding operation of the evaporator core body 100; A welding adjustment mechanism 3 is provided between the equipment frame 21 and the induction heating gun 22, a clamping mechanism 5 is provided in the U-shaped bracket 23, and a rotating mechanism 6 is provided between the welding table 1 and the U-shaped bracket 23. By setting the welding adjustment mechanism 3, the clamping mechanism 5 and the rotating mechanism 6, the clamping mechanism 5 can clamp the evaporator core body 100 located in the U-shaped bracket 23, and the welding adjustment mechanism 3 can adjust the vertical and horizontal positions of the induction heating gun 22, so that a plurality of U-shaped joint pipes 300 are welded to the corresponding circulating aluminum pipes 200 one by one, thereby providing In order to facilitate the brazing and welding of the evaporator core body 100 and improve the efficiency of brazing and welding, the rotating mechanism 6 can rotate the four evaporator core bodies 100 through the four U-shaped brackets 23, so that the four evaporator core bodies 100 are located one by one under the induction heating gun 22, and the other three positions can be used for operators to remove the welded evaporator core body 100, as well as to sleeve the U-shaped joint tube 300 on the circulating aluminum tube 200 and apply brazing material, thereby further improving the brazing and welding efficiency of the evaporator core body 100.

[0025] The welding adjustment mechanism 3 includes a return frame 31, one end of the return frame 31 is fixedly mounted on the equipment frame 21, a movable seat 32 is slidably provided inside the return frame 31, an adjusting cylinder 33 is fixedly mounted on the upper surface of the movable seat 32, a first connecting plate 34 is fixedly mounted on the piston end of the adjusting cylinder 33, a second connecting plate 35 is fixedly mounted on one end of the first connecting plate 34, a pushing cylinder 36 is fixedly mounted on the upper surface of the second connecting plate 35, a connecting frame 37 is fixedly mounted on the piston end of the pushing cylinder 36, one end of the connecting frame 37 is fixedly connected to the gun body of the induction heating gun 22, and by driving the movable seat 32 to slide horizontally in the return frame 31, the movable seat 32 can be adjusted by the adjusting cylinder 33, the first connecting plate 3 4. The second connecting plate 35, the pushing cylinder 36 and the connecting frame 37 enable the induction heating gun 22 to move horizontally in the horizontal direction. By opening the pushing cylinder 36, the pushing cylinder 36 can enable the induction heating gun 22 to move horizontally in the horizontal direction through the connecting frame 37. By opening the adjusting cylinder 33, the adjusting cylinder 33 can enable the induction heating gun 22 to move vertically up and down through the first connecting plate 34, the second connecting plate 35, the pushing cylinder 36 and the connecting frame 37, so that the induction heating gun 22 is sleeved on or detached from the sleeve joint of the U-shaped joint tube 300 and the circulating aluminum tube 200, thereby realizing the adjustment of the induction heating gun 22, so that the induction heating gun 22 can weld the sleeve joints of multiple U-shaped joint tubes 300 and multiple circulating aluminum tubes 200 one by one.

[0026] A first motor 38 is fixedly installed at one end of the return frame 31, and a lead screw 39 is fixedly installed at the driving output end of the first motor 38. The lead screw 39 is rotationally connected to the return frame 31, and the lead screw 39 is threadedly rotationally connected to the moving seat 32. By turning on the first motor 38, the driving shaft of the first motor 38 can rotate the lead screw 39, and the lead screw 39 can drive the moving seat 32 to slide horizontally in the return frame 31.

[0027] Two first guide grooves 4 are provided on the side wall of the return frame 31, and a first guide block 41 is slidably installed at one end of the two first guide grooves 4, and a connecting rod 42 is fixedly installed on the opposite sides of the two first guide blocks 41, and the opposite ends of the two connecting rods 42 are fixedly connected to the side of the moving seat 32. By setting the first guide groove 4, the first guide block 41 and the connecting rod 42, the first guide block 41 can slide horizontally in the first guide groove 4, so that the moving seat 32 can be guided horizontally through the connecting rod 42, so that the moving seat 32 can keep moving in the horizontal direction.

[0028] A second guide groove 43 is formed on the upper surface of the second connecting plate 35, and a second guide block 44 is slidably mounted on one end of the second guide groove 43. The other end of the connecting frame 37 is fixedly connected to the upper surface of the second guide block 44. By providing the second guide groove 43 and the second guide block 44, the second guide block 44 can slide horizontally in the second guide groove 43, so that the connecting frame 37 and the induction heating gun 22 can keep moving in the horizontal direction.

[0029] The clamping mechanism 5 includes four placement tables 51, one of which is arranged in a U-shaped bracket 23. Two clamping cylinders 52 are fixedly installed on the upper surfaces of the four placement tables 51. The piston ends of the clamping cylinders 52 are fixedly installed with U-shaped limit plates 53. When the evaporator core body 100 is placed on the upper surface of the placement table 51, by opening the clamping cylinder 52, the piston end of the clamping cylinder 52 can push the U-shaped limit plate 53 to move horizontally. When the two U-shaped limit plates 53 are close to each other, the evaporator core body 100 can be clamped.

[0030] Two lifting cylinders 54 are fixedly installed on the bottom walls of the four U-shaped brackets 23, wherein the piston ends of two adjacent lifting cylinders 54 are fixedly connected to the lower surface of a placement table 51. By setting the lifting cylinders 54, when the lifting cylinders 54 are turned on, the evaporator core body 100 can be vertically raised and lowered through the placement table 51, thereby facilitating the operator to carry the evaporator core body 100 after brazing to other processing equipment, and facilitating the operator to carry the evaporator core body 100 that has not been brazed to the placement table 51.

[0031] Two slide rails 55 are fixedly installed at both ends of the four U-shaped brackets 23, and a slider 56 is slidably installed at one end of the slide rail 55. The slider 56 is fixedly connected to one end of the placement table 51. By setting the slide rails 55 and the slider 56, the slider 56 can slide vertically on the slide rails 55, thereby guiding the placement table 51 in the vertical direction, so that the placement table 51 can maintain the vertical lifting and lowering, thereby improving the stability of the placement table 51.

[0032] The rotating mechanism 6 includes a cross 61, the lower surface of the cross 61 is in active contact with the upper surface of the welding table 1, the upper surface of the cross 61 is fixedly connected to the lower surfaces of the four U-shaped brackets 23, a rotating shaft 62 is rotatably installed on the welding table 1, one end of the rotating shaft 62 is fixedly connected to the center position of the cross 61, and a driven gear 63 is fixedly installed on the other end of the rotating shaft 62. By driving the driven gear 63 to rotate, the driven gear 63 can rotate the rotating shaft 62, and the rotating shaft 62 can rotate the cross 61. The cross 61 can make the evaporator core body 100 revolve around the axis of the rotating shaft 62 as the center of the circle through the U-shaped bracket 23, so that the evaporator core body 100 is located below the induction heating gun 22, or staggered with the induction heating gun 22.

[0033] A second motor 64 is fixedly installed on the lower surface of the welding table 1, and a rotating rod 65 is fixedly installed on the driving output end of the second motor 64. One end of the rotating rod 65 is rotatably connected to the lower surface of the welding table 1, and a driving gear 66 is fixedly installed on the other end of the rotating rod 65. The driving gear 66 is meshingly connected with the driven gear 63. By turning on the second motor 64, the driving shaft of the second motor 64 can rotate the driving gear 66 through the rotating rod 65, and the driving gear 66 can drive the driven gear 63 to rotate.

[0034] Working principle: When the evaporator core body 100 needs to be brazed, the operator first sleeves a plurality of U-shaped joint tubes 300 onto the corresponding circulating aluminum tubes 200, and applies the brazing material for brazing to the joints between the U-shaped joint tubes 300 and the circulating aluminum tubes 200; During the first brazing and welding process, four evaporator core bodies 100 are assembled at a time, and the four evaporator core bodies 100 are placed on the corresponding placement table 51, and then the multiple clamping cylinders 52 are opened respectively, and the piston ends of the multiple clamping cylinders 52 push the multiple U-shaped limit plates 53 to move horizontally, and two adjacent U-shaped limit plates 53 are close to each other, and the two U-shaped limit plates 53 are close to each other to clamp one evaporator core body 100; Subsequently, during the brazing process, the operator first starts the high-frequency welding machine chassis 2, which rapidly heats up the heating tube at the front end of the induction heating gun 22 through the cable, and then respectively starts the first motor 38, the regulating cylinder 33 and the pushing cylinder 36; The driving shaft of the first motor 38 rotates the lead screw 39, and the lead screw 39 drives the moving seat 32 to slide horizontally in the return frame 31. The moving seat 32 moves the induction heating gun 22 horizontally through the adjusting cylinder 33, the first connecting plate 34, the second connecting plate 35, the pushing cylinder 36 and the connecting frame 37. The pushing cylinder 36 moves the induction heating gun 22 vertically through the connecting frame 37. The adjusting cylinder 33 moves the induction heating gun 22 vertically through the first connecting plate 34, the second connecting plate 35, the pushing cylinder 36 and the connecting frame 37, so that the heating tube of the induction heating gun 22 is sleeved at the sleeve joint of the U-shaped joint tube 300 and the circulating aluminum tube 200 or is detached; When the heating tube of the induction heating gun 22 is sleeved at the sleeve joint of the U-shaped joint tube 300 and the circulating aluminum tube 200, the high temperature of the heating tube of the induction heating gun 22 melts the brazing material, so that the U-shaped joint tube 300 is fixed to the end of the circulating aluminum tube 200, thereby conveniently realizing the automatic brazing welding process of multiple U-shaped joint tubes 300 and multiple circulating aluminum tubes 200, thereby effectively improving the convenience of the brazing welding process of the evaporator core body 100, and effectively improving the brazing welding process efficiency of the evaporator core body 100; When the brazing welding process of the evaporator core body 100 located below the induction heating gun 22 is completed, the operator turns on the second motor 64, and the driving shaft of the second motor 64 rotates the driving gear 66 through the rotating rod 65, and the driving gear 66 drives the driven gear 63 to rotate, and the driven gear 63 rotates the cross 61 through the rotating shaft 62. The cross 61 rotates the four evaporator core bodies 100 with the axis of the rotating shaft 62 as the center of the circle through the four U-shaped brackets 23, so that the evaporator core body 100 after the brazing welding process is completed The evaporator core body 100 is staggered with the induction heating gun 22, and the evaporator core body 100 that has not been brazed and welded is rotated to the bottom of the induction heating gun 22 to facilitate the brazing and welding process again, thereby conveniently achieving the correspondence or staggering of the evaporator core body 100 and the induction heating gun 22, and providing other three operating stations for operators to assemble the evaporator core body 100, or remove the evaporator core body 100 after the brazing and welding process is completed, further improving the brazing and welding efficiency of the evaporator core body 100.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A brazing device for an evaporator core, comprising a welding station (1), characterized in that: A high-frequency welding machine chassis (2) is arranged on the upper surface of the welding table (1); a device frame (21) is fixedly installed on the bottom of the high-frequency welding machine chassis (2); one end of the device frame (21) is fixedly connected to the upper surface of the welding table (1); one side of the high-frequency welding machine chassis (2) is connected to an induction heating gun (22) via a cable; four U-shaped brackets (23) are arranged on the upper surface of the welding table (1); the four U-shaped brackets (23) are distributed in a ring array; A welding adjustment mechanism (3) is provided between the equipment frame (21) and the induction heating gun (22), a clamping mechanism (5) is provided in the U-shaped bracket (23), and a rotating mechanism (6) is provided between the welding table (1) and the U-shaped bracket (23).

2. A brazing device for an evaporator core according to claim 1, characterized in that: The welding adjustment mechanism (3) comprises a return frame (31), one end of the return frame (31) is fixedly mounted on the equipment frame (21), a movable seat (32) is slidably provided inside the return frame (31), an adjusting cylinder (33) is fixedly mounted on the upper surface of the movable seat (32), a first connecting plate (34) is fixedly mounted on the piston end of the adjusting cylinder (33), a second connecting plate (35) is fixedly mounted on one end of the first connecting plate (34), a pushing cylinder (36) is fixedly mounted on the upper surface of the second connecting plate (35), a connecting frame (37) is fixedly mounted on the piston end of the pushing cylinder (36), and one end of the connecting frame (37) is fixedly connected to the gun body of the induction heating gun (22).

3. A brazing device for an evaporator core according to claim 2, characterized in that: A first motor (38) is fixedly mounted on one end of the return frame (31), a lead screw (39) is fixedly mounted on the drive output end of the first motor (38), the lead screw (39) is rotationally connected to the return frame (31), and the lead screw (39) is rotationally connected to the moving seat (32) by a thread.

4. A brazing device for an evaporator core according to claim 2, characterized in that: The side wall of the return frame (31) is provided with two first guide grooves (4), one end of each of the two first guide grooves (4) is slidably mounted with a first guide block (41), the opposite sides of the two first guide blocks (41) are fixedly mounted with a connecting rod (42), and the opposite ends of the two connecting rods (42) are fixedly connected to the side of the movable seat (32).

5. A brazing device for an evaporator core as claimed in claim 2, characterized in that: A second guide groove (43) is formed on the upper surface of the second connecting plate (35), a second guide block (44) is slidably mounted on one end of the second guide groove (43), and the other end of the connecting frame (37) is fixedly connected to the upper surface of the second guide block (44).

6. A brazing device for an evaporator core according to claim 1, characterized in that: The clamping mechanism (5) comprises four placement tables (51), one of the placement tables (51) being arranged in a U-shaped bracket (23), two clamping cylinders (52) being fixedly mounted on the upper surfaces of the four placement tables (51), and a U-shaped limiting plate (53) being fixedly mounted on the piston end of the clamping cylinder (52).

7. A brazing device for an evaporator core according to claim 6, characterized in that: Two lifting cylinders (54) are fixedly mounted on the bottom walls of the four U-shaped brackets (23), wherein the piston ends of two adjacent lifting cylinders (54) are fixedly connected to the lower surface of a placement platform (51).

8. A brazing device for an evaporator core according to claim 6, characterized in that: Two slide rails (55) are fixedly mounted at both ends of the four U-shaped brackets (23); a slider (56) is slidably mounted on one end of the slide rail (55); and the slider (56) is fixedly connected to one end of the placement table (51).

9. A brazing device for an evaporator core according to claim 1, characterized in that: The rotating mechanism (6) comprises a cross (61), the lower surface of the cross (61) is in movable contact with the upper surface of the welding table (1), the upper surface of the cross (61) is fixedly connected to the lower surfaces of four U-shaped brackets (23), a rotating shaft (62) is rotatably mounted on the welding table (1), one end of the rotating shaft (62) is fixedly connected to the center position of the cross (61), and a driven gear (63) is fixedly mounted on the other end of the rotating shaft (62).

10. A brazing device for an evaporator core according to claim 9, characterized in that: A second motor (64) is fixedly mounted on the lower surface of the welding table (1); a rotating rod (65) is fixedly mounted on the driving output end of the second motor (64); one end of the rotating rod (65) is rotatably connected to the lower surface of the welding table (1); a driving gear (66) is fixedly mounted on the other end of the rotating rod (65); and the driving gear (66) is meshingly connected to the driven gear (63).

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