Heat exchanger motherboard pre-spraying equipment

Abstract

The present invention discloses a heat exchanger mainboard pre-spraying device, which specifically relates to the technical field of heat exchanger mainboards, and comprises a pre-spraying device body and a brushing mechanism; the pre-spraying device body comprises a heating zone for heating the heat exchanger mainboard, a pre-spraying zone for pre-spraying the heat exchanger mainboard, a drying zone and a nozzle for drying the heat exchanger mainboard; the pre-spraying zone is arranged on one side of the heating zone; the drying zone is arranged on the side of the pre-spraying zone away from the heating zone; the heat exchanger mainboard is transported and pre-sprayed by a mesh transmission belt between the heating zone, the pre-spraying zone and the drying zone; a plurality of the nozzles are evenly arranged in the pre-spraying zone, and a brushing mechanism is arranged in the pre-spraying zone; the present invention has a reasonable structure and an ingenious design, can perform continuous pre-spraying on the heat exchanger mainboard, and has a high pre-spraying efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchanger mainboards, and more specifically, to a heat exchanger mainboard pre-spraying device. Background Art

[0002] A heat exchanger is a machine. When the indoor air conditioning return air and the outdoor fresh air pass through the heat exchanger in a positive cross manner, due to the temperature difference and water vapor partial pressure difference between the airflows on both sides of the flat partition, heat and mass transfer occurs simultaneously between the two airflows, causing a full heat exchange process. The heat exchanger includes parts such as heat source and cold source, heat exchanger, pump, control system, filter and main board, etc.

[0003] For example, the heat exchanger parts pre-spraying rotating device provided by the Chinese utility model patent with publication number CN218308757U includes a workbench, support legs, a support plate, and a mounting plate. A spraying mechanism is arranged above the workbench, and the spraying mechanism includes an electric telescopic rod, a connecting plate, a buffer box, and a buffer plate. The top of the electric telescopic rod is fixedly connected to the bottom of the mounting plate, the bottom of the electric telescopic rod is fixedly connected to the top of the connecting plate, the bottom of the connecting plate is fixedly connected to the top of the buffer box, the inner wall of the buffer box is slidably connected to both ends of the buffer plate, a buffer rod is fixedly installed at the bottom of the buffer plate, the bottom of the buffer rod passes through the inner wall of the buffer box and extends to the bottom of the buffer box, a bearing plate is fixedly installed at the bottom of the buffer rod, and a placement plate is fixedly installed at the bottom of the bearing plate, so that the parts can be better sprayed, the spraying steps are reduced, the production efficiency is improved, and the quality of the product is improved.

[0004] During the processing of the heat exchanger mainboard, it is necessary to use pre-spraying equipment to pre-spray the heat exchanger mainboard, and the existing pre-spraying equipment is generally a spray gun, by adding a proper amount of spray liquid into the spray box of the spray gun, and then pre-spraying the heat exchanger mainboard by manually holding the spray gun, which not only increases the workload of the staff, but also reduces the pre-spraying efficiency of the heat exchanger mainboard. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a heat exchanger mainboard pre-spraying device. The technical problem to be solved by the present invention is that the pre-spraying efficiency of the heat exchanger mainboard is low.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a heat exchanger mainboard pre-spraying device, comprising a pre-spraying device body and a brushing mechanism; the pre-spraying device body comprises a heating zone for heating the heat exchanger mainboard, a pre-spraying zone for pre-spraying the heat exchanger mainboard, a drying zone and a nozzle for drying the heat exchanger mainboard; the pre-spraying zone is arranged on one side of the heating zone; the drying zone is arranged on the side of the pre-spraying zone away from the heating zone; the heat exchanger mainboard is transported and pre-sprayed by a mesh transmission belt between the heating zone, the pre-spraying zone and the drying zone; a plurality of the nozzles are evenly arranged in the pre-spraying zone, and a brushing mechanism is provided in the pre-spraying zone.

[0007] As a further solution of the present invention: the brushing mechanism includes a moving component and a brushing component; the output end of the moving component is connected to the input end of the brushing component.

[0008] As a further solution of the present invention: the moving component includes a moving plate, an empty slot, a fixed plate, a transmission rod, a movable plate, a connecting plate and a spring A; the moving plate is slidably arranged on the pre-spraying area, and the moving plate is connected to the pre-spraying area through a reset component and driven by a driving component; an empty slot is opened in the moving plate; the fixed plate is fixed in the empty slot; the transmission rod is slidably arranged on the fixed plate; the movable plate is slidably arranged in the empty slot and is fixedly connected to one end of the transmission rod; the connecting plate is fixedly connected to the other end of the transmission rod; the spring A is sleeved on the transmission rod, and the two ends of the spring A are respectively fixedly connected to the fixed plate and the movable plate.

[0009] As a further solution of the present invention: the brushing assembly includes a rotating block, a sliding groove, a sliding block, a mounting plate and a brushing plate; the two rotating blocks are symmetrically rotated through the rotating axis A and are arranged on the bottom side of the movable plate; two sliding grooves are opened on the opposite surfaces of the two rotating blocks; the two sliding blocks are symmetrically rotated through the rotating axis B and are arranged on both sides of the connecting plate; the sliding blocks are slidably matched with the sliding grooves; the mounting plate is fixedly mounted on the side of the rotating block away from the movable plate; the brushing plate is fixedly mounted on the mounting plate by bolts; the bristles of the brushing plate are in contact with the mainboard of the heat exchanger.

[0010] As a further solution of the present invention: the opposing surfaces of the two rotating blocks are inclined surfaces, and the structural opening direction formed by the two rotating blocks is arranged upward.

[0011] As a further solution of the present invention: the sliding block is a T-shaped inclined structure, and the dimension of the sliding block close to the connecting plate is smaller than the dimension of the sliding block away from the connecting plate.

[0012] As a further solution of the present invention: the reset assembly includes a reset plate and a spring B; at least one of the reset plates is fixedly mounted on the movable plate; and at least one of the springs B has two ends respectively fixedly connected to the inner wall of the pre-spraying area and the reset plate.

[0013] As a further solution of the present invention: the driving assembly includes a servo motor, a rotating disk, an extrusion block A and an extrusion block B; the servo motor is fixed on the pre-spraying area through a motor seat; the rotating disk is sleeved on the output shaft of the servo motor; the two extrusion blocks A are symmetrically fixed on the circumferential surface of the rotating disk and are in contact with the movable plate; the extrusion block B is fixed on the circumferential surface of the rotating disk and is fixedly connected to the two extrusion blocks A and is in contact with the movable plate.

[0014] As a further solution of the present invention: the height dimension of the extrusion block B is greater than the height dimension of the extrusion block A.

[0015] As a further solution of the present invention: the thickness of the rotating disk, the thickness of the extrusion block A and the thickness of the movable plate are the same, and the thickness of the extrusion block B is the same as the thickness of the movable plate.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention sets a heating zone, a pre-spraying zone, a drying zone and a nozzle. When in use, first, start the pre-spraying equipment body to rotate the transmission belt on the pre-spraying equipment body, then place the heat exchanger mainboard to be pre-sprayed on the transmission belt of the pre-spraying equipment body, and the heat exchanger mainboard can pass through the heating zone through the transmission belt. After being heated in the heating zone, it will enter the pre-spraying zone, so that the nozzle in the pre-spraying zone can pre-spray the heat exchanger mainboard. After completing the pre-spraying of the heat exchanger mainboard, the conveyor belt will transport the pre-sprayed heat exchanger mainboard to the drying zone. After being dried in the drying zone, it enters the collection box to realize the entire pre-spraying process of the heat exchanger mainboard. Compared with the prior art, the present invention has a reasonable structure and a clever design, can perform continuous pre-spraying on the heat exchanger mainboard, and has a high pre-spraying efficiency.

[0018] 2. The present invention sets a moving component, a brushing component and a reset component, so that when the heat exchanger mainboard enters the pre-spraying area through the conveyor belt, the moving plate drives the reset plate to slide downward in the pre-spraying area through the driving component, so that the spring B is stretched by force, so that the bristles of the brushing plate can contact the heat exchanger mainboard, so that the bristles of the brushing plate can brush the dead corners and corners of the heat exchanger mainboard, and then the driving component is used to slide the movable plate downward in the empty groove, so that the transmission rod slides downward on the fixed plate, so that the spring A is forced to contract, and the connecting plate moves downward, so that the sliding block rotates with the connecting plate through the rotating shaft B, and the sliding block slides in the sliding groove, so that the two rotating blocks rotate away from each other on the moving plate through the rotating shaft A, and the two brushing plates rotate away from each other, so that the brushing plate can brush the heat exchanger mainboard on the side, thereby improving the uniformity of the pre-spraying of the heat exchanger mainboard.

[0019] 3. The present invention sets a driving component and starts the servo motor so that the output shaft of the servo motor drives the rotating disk to rotate, so that the extrusion block A can extrude the movable plate, and the bristles of the two brushing plates can brush the heat exchanger mainboard in the middle position. When the extrusion block B extrude the movable plate, the two rotating blocks can rotate away from each other on the movable plate through the rotating shaft A, and the two brushing plates can rotate away from each other, so that the brushing plates can brush the heat exchanger mainboard on the side. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the pre-spraying area of ​​the present invention;

[0022] Figure 3 It is a cross-sectional view of the structure of the pre-spraying area of ​​the present invention;

[0023] Figure 4 It is a cross-sectional view of another state of the pre-spraying area structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the partial structure disassembly of the present invention;

[0025] Figure 6 It is a partial structural split cross-sectional view of the present invention;

[0026] Figure 7 For the present invention Figure 3 The enlarged schematic diagram at A in the middle;

[0027] Figure 8 For the present invention Figure 4 Enlarged schematic diagram of point B in the middle.

[0028] In the figure:

[0029] 1. Pre-spraying equipment body; 2. Brushing mechanism; 3. Moving assembly; 4. Brushing assembly; 5. Reset assembly; 6. Driving assembly;

[0030] 101, heating area; 102, pre-spraying area; 103, drying area; 104, spray head;

[0031] 301, movable plate; 302, empty slot; 303, fixed plate; 304, transmission rod; 305, movable plate; 306, connecting plate; 307, spring A;

[0032] 401, rotating block; 402, sliding groove; 403, sliding block; 404, mounting plate; 405, brushing plate;

[0033] 501, reset plate; 502, spring B;

[0034] 601, servo motor; 602, rotating disk; 603, extrusion block A; 604, extrusion block B. DETAILED DESCRIPTION

[0035] 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.

[0036] like Figures 1 to 8 As shown, the present invention provides a heat exchanger mainboard pre-spraying device, including a pre-spraying device body 1 and a brushing mechanism 2; the pre-spraying device body 1 includes a heating area 101 for heating the heat exchanger mainboard, a pre-spraying area 102 for pre-spraying the heat exchanger mainboard, a drying area 103 for drying the heat exchanger mainboard and a nozzle 104; the pre-spraying area 102 is arranged on one side of the heating area 101; the drying area 103 is arranged on the side of the pre-spraying area 102 away from the heating area 101; the heat exchanger mainboard is transported and pre-sprayed by a mesh transmission belt between the heating area 101, the pre-spraying area 102 and the drying area 103; a plurality of nozzles 104 are evenly arranged in the pre-spraying area 102, and a brushing mechanism 2 is provided in the pre-spraying area 102.

[0037] The present invention is provided with a heating zone 101, a pre-spraying zone 102, a drying zone 103 and a nozzle 104. When in use, first, the pre-spraying device body 1 is started to rotate the transmission belt on the pre-spraying device body 1, and then the heat exchanger mainboard to be pre-sprayed is placed on the transmission belt of the pre-spraying device body 1. The heat exchanger mainboard can pass through the heating zone 101 through the transmission belt. After being heated by the heating zone 101, it will enter the pre-spraying zone 102, so that the nozzle 104 in the pre-spraying zone 102 can pre-spray the heat exchanger mainboard. After completing the pre-spraying of the heat exchanger mainboard, the conveyor belt will transport the pre-sprayed heat exchanger mainboard to the drying zone 103. After being dried in the drying zone 103, it enters the collection box to realize the entire pre-spraying process of the heat exchanger mainboard. Compared with the prior art, the present invention has a reasonable structure and a clever design, can perform continuous pre-spraying on the heat exchanger mainboard, and has a high pre-spraying efficiency.

[0038] As a preferred embodiment, the brushing mechanism 2 includes a moving component 3 and a brushing component 4; the output end of the moving component 3 is connected to the input end of the brushing component 4;

[0039] The moving assembly 3 includes a moving plate 301, an empty slot 302, a fixed plate 303, a transmission rod 304, a movable plate 305, a connecting plate 306 and a spring A307; the moving plate 301 is slidably arranged on the pre-spraying area 102, and the moving plate 301 is connected to the pre-spraying area 102 through the reset assembly 5 and driven by the driving assembly 6; an empty slot 302 is provided in the moving plate 301; the fixed plate 303 is fixed in the empty slot 302; the transmission rod 304 is slidably arranged on the fixed plate 303; the movable plate 305 is slidably arranged in the empty slot 302 and is fixedly connected to one end of the transmission rod 304; the connecting plate 306 is fixedly connected to the other end of the transmission rod 304; the spring A307 is sleeved on the transmission rod 304, and the two ends of the spring A307 are respectively fixedly connected to the fixed plate 303 and the movable plate 305;

[0040] The brushing assembly 4 includes a rotating block 401, a sliding groove 402, a sliding block 403, a mounting plate 404 and a brushing plate 405; the two rotating blocks 401 are symmetrically rotated on the bottom side of the movable plate 301 through a rotating axis A; two sliding grooves 402 are provided on the opposite surfaces of the two rotating blocks 401; the two sliding blocks 403 are symmetrically rotated on both sides of the connecting plate 306 through a rotating axis B; the sliding blocks 403 are slidably matched with the sliding grooves 402; the mounting plate 404 is fixedly mounted on the side of the rotating block 401 away from the movable plate 301; the brushing plate 405 is fixedly mounted on the mounting plate 404 by bolts; the bristles of the brushing plate 405 are in contact with the mainboard of the heat exchanger; the opposite surfaces of the two rotating blocks 401 are inclined surfaces, and the structural opening direction formed by the two rotating blocks 401 is set upward; the sliding block 403 is a T-shaped inclined structure, and the size of the sliding block 403 close to the connecting plate 306 is smaller than the size of the sliding block 403 away from the connecting plate 306;

[0041] The reset assembly 5 includes a reset plate 501 and a spring B502; the two reset plates 501 are symmetrically fixed on both sides of the movable plate 301; the two springs B502 are arranged in a linear array in the pre-spraying area 102, and the two ends of the spring B502 are fixedly connected to the inner wall of the pre-spraying area 102 and the reset plate 501 respectively.

[0042] The present invention is provided with a moving component 3, a brushing component 4 and a reset component 5, so that when the heat exchanger mainboard enters the pre-spraying area 102 through the conveyor belt, the moving plate 301 drives the reset plate 501 to slide downward on the pre-spraying area 102 through the driving component 6, so that the spring B502 is stretched under force, so that the bristles of the brushing plate 405 can contact the heat exchanger mainboard, so that the bristles of the brushing plate 405 can brush the dead corners and corners of the heat exchanger mainboard, and then the movable plate 305 is driven by the driving component 6 to slide downward in the empty slot 302, so that the conveyor The movable rod 304 slides downward on the fixed plate 303, causing the spring A307 to contract under force, causing the connecting plate 306 to move downward, causing the sliding block 403 to rotate with the connecting plate 306 through the rotating shaft B, and causing the sliding block 403 to slide in the sliding groove 402, causing the two rotating blocks 401 to rotate away from each other on the movable plate 301 through the rotating shaft A, causing the two brushing plates 405 to rotate away from each other, so that the brushing plates 405 can brush the heat exchanger mainboard on the side, thereby improving the uniformity of the pre-spraying of the heat exchanger mainboard.

[0043] As a preferred embodiment, the driving assembly 6 includes a servo motor 601, a rotating disk 602, an extrusion block A603 and an extrusion block B604; the servo motor 601 is fixed on the pre-spraying area 102 through a motor seat; the rotating disk 602 is sleeved on the output shaft of the servo motor 601; the two extrusion blocks A603 are symmetrically fixed on the circumferential surface of the rotating disk 602 and are in contact with the movable plate 301; the extrusion block B604 is fixed on the circumferential surface of the rotating disk 602 and is fixedly connected to the two extrusion blocks A603 and is in contact with the movable plate 305; the height dimension of the extrusion block B604 is greater than the height dimension of the extrusion block A603; the thickness dimension of the rotating disk 602, the thickness dimension of the extrusion block A603 and the thickness dimension of the movable plate 301 are the same, and the thickness dimension of the extrusion block B604 is the same as the thickness dimension of the movable plate 305.

[0044] The present invention sets a driving component 6 and starts a servo motor 601, so that the output shaft of the servo motor 601 drives the rotating disk 602 to rotate, so that the extrusion block A603 can extrude the movable plate 301, and the bristles of the two brushing plates 405 can brush the heat exchanger mainboard in the middle position. When the extrusion block B604 squeezes the movable plate 305, the two rotating blocks 401 can rotate away from each other on the movable plate 301 through the rotating shaft A, so that the two brushing plates 405 rotate away from each other, and the brushing plates 405 can brush the heat exchanger mainboard on the side.

[0045] The movable plate 301 drives the reset plate 501 to slide downward on the pre-spraying area 102, so that the bristles of the brush plate 405 can contact the heat exchanger mainboard until the extrusion block B604 squeezes the movable plate 305. At this time, the movable plate 305 slides downward in the empty slot 302, so that the transmission rod 304 slides downward on the fixed plate 303, and the spring A307 is forced to contract.

[0046] Working principle of the present invention: when in use, first, start the pre-spraying equipment body 1, so that the transmission belt on the pre-spraying equipment body 1 rotates, then, the heat exchanger mainboard that needs to be pre-sprayed is placed on the transmission belt of the pre-spraying equipment body 1, and the heat exchanger mainboard can pass through the heating zone 101 through the transmission belt. After being heated in the heating zone 101, it will enter the pre-spraying zone 102, so that the nozzle 104 in the pre-spraying zone 102 can pre-spray the heat exchanger mainboard, and at the same time, start the servo motor 601, so that the output shaft of the servo motor 601 drives the rotating disk 602 to rotate, so that one of the extrusion blocks A603 squeezes the movable plate 301, so that the movable plate 301 drives the reset plate 501 slides downward on the pre-spraying area 102, so that the spring B502 is stretched under force, so that the bristles of the brush plate 405 can contact the heat exchanger mainboard, so that the bristles of the brush plate 405 can brush the dead corners and corners of the heat exchanger mainboard until the extrusion block B604 squeezes the movable plate 305. At this time, the movable plate 305 slides downward in the empty groove 302, so that the transmission rod 304 slides downward on the fixed plate 303, so that the spring A307 is contracted under force, so that the connecting plate 306 moves downward, so that the sliding block 403 rotates with the connecting plate 306 through the rotating shaft B, and the sliding block 403 slides in the sliding groove 402, so that the two rotating blocks 401 move in the moving groove through the rotating shaft A. The movable plate 301 rotates away from each other, so that the two brushing plates 405 rotate away from each other, so that the brushing plates 405 can brush the heat exchanger motherboard on the side until the other extrusion block A603 contacts the movable plate 301. At this time, the spring A307 is no longer stressed and begins to stretch, so that the movable plate 305 slides upward in the empty groove 302, so that the transmission rod 304 slides upward on the fixed plate 303, so that the connecting plate 306 moves upward, so that the sliding block 403 rotates in the opposite direction to the connecting plate 306 through the rotating shaft B, and the sliding block 403 slides in the opposite direction in the sliding groove 402, so that the two rotating blocks 401 are on the movable plate 301 through the rotating shaft A. The two brush plates 405 rotate relative to each other until the spring A307 returns to its original shape. At this time, the extrusion block B604 is no longer in contact with the movable plate 305. At the same time, the spring B502 is no longer under force and begins to shrink, so that the movable plate 301 drives the reset plate 501 to slide upward on the pre-spraying area 102 until the circumferential surface of the rotating disk 602 contacts the movable plate 301. At this time, the spring B502 returns to its original shape. After the pre-spraying of the heat exchanger mainboard is completed, the conveyor belt will transport the pre-sprayed heat exchanger mainboard to the drying area 103. After being dried in the drying area 103, it enters the collection box to complete the entire pre-spraying process of the heat exchanger mainboard.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat exchanger mainboard pre-spraying device, characterized in that: The invention comprises a pre-spraying device body (1) and a brushing mechanism (2); the pre-spraying device body (1) comprises a heating area (101) for heating a heat exchanger mainboard, a pre-spraying area (102) for pre-spraying the heat exchanger mainboard, a drying area (103) for drying the heat exchanger mainboard, and a spray head (104); the pre-spraying area (102) is arranged on one side of the heating area (101); the drying area (103) is arranged on a side of the pre-spraying area (102) away from the heating area (101); the heat exchanger mainboard is transported and pre-sprayed by a mesh transmission belt between the heating area (101), the pre-spraying area (102), and the drying area (103); a plurality of the spray heads (104) are evenly arranged in the pre-spraying area (102), and a brushing mechanism (2) is arranged in the pre-spraying area (102); The brushing mechanism (2) comprises a moving component (3) and a brushing component (4); the output end of the moving component (3) is connected to the input end of the brushing component (4); The moving assembly (3) comprises a moving plate (301), an empty slot (302), a fixed plate (303), a transmission rod (304), a movable plate (305), a connecting plate (306) and a spring A (307); the moving plate (301) is slidably arranged on the pre-spraying area (102), and the moving plate (301) is connected to the pre-spraying area (102) via a reset assembly (5) and is driven by a driving assembly (6); the moving plate (301) is provided with an empty slot (302); the fixed plate (303) is provided with a plurality of movable plates (305), a connecting plate (306) and a spring A (307); 03) is fixed in the empty slot (302); the transmission rod (304) is slidably arranged on the fixed plate (303); the movable plate (305) is slidably arranged in the empty slot (302) and is fixedly connected to one end of the transmission rod (304); the connecting plate (306) is fixedly connected to the other end of the transmission rod (304); the spring A (307) is sleeved on the transmission rod (304), and the two ends of the spring A (307) are fixedly connected to the fixed plate (303) and the movable plate (305) respectively; The brushing assembly (4) comprises a rotating block (401), a sliding groove (402), a sliding block (403), a mounting plate (404) and a brushing plate (405); the two rotating blocks (401) are symmetrically rotated on the bottom side of the movable plate (301) via a rotating axis A; two sliding grooves (402) are provided on opposite surfaces of the two rotating blocks (401); the two sliding blocks (403) are symmetrically rotated on both sides of the connecting plate (306) via a rotating axis B; the sliding blocks (403) are slidably matched with the sliding grooves (402); the mounting plate (404) is fixedly mounted on a side of the rotating block (401) away from the movable plate (301); the brushing plate (405) is fixedly mounted on the mounting plate (404) via bolts; the bristles of the brushing plate (405) are in contact with the mainboard of the heat exchanger; The driving assembly (6) comprises a servo motor (601), a rotating disk (602), an extrusion block A (603) and an extrusion block B (604); the servo motor (601) is fixedly mounted on the pre-spraying area (102) via a motor seat; the rotating disk (602) is sleeved on the output shaft of the servo motor (601); the two extrusion blocks A (603) are symmetrically fixedly mounted on the circumferential surface of the rotating disk (602) and are in contact with the movable plate (301); the extrusion block B (604) is fixedly mounted on the circumferential surface of the rotating disk (602) and is fixedly connected to the two extrusion blocks A (603) and is in contact with the movable plate (305); The height dimension of the extrusion block B (604) is greater than the height dimension of the extrusion block A (603).

2. A heat exchanger mainboard pre-spraying device according to claim 1, characterized in that: The opposing surfaces of the two rotating blocks (401) are inclined surfaces, and the structural opening direction formed by the two rotating blocks (401) is arranged upwards.

3. A heat exchanger mainboard pre-spraying device according to claim 1, characterized in that: The sliding block (403) is a T-shaped inclined structure, and the size of the side of the sliding block (403) close to the connecting plate (306) is smaller than the size of the side of the sliding block (403) away from the connecting plate (306).

4. The heat exchanger mainboard pre-spraying device according to claim 1, characterized in that: The reset assembly (5) comprises a reset plate (501) and a spring B (502); at least one of the reset plates (501) is fixedly mounted on the movable plate (301); and at least one of the springs B (502) has two ends respectively fixedly connected to the inner wall of the pre-spraying area (102) and the reset plate (501).

5. The heat exchanger mainboard pre-spraying device according to claim 1, characterized in that: The thickness of the rotating disk (602), the thickness of the extrusion block A (603) and the thickness of the movable plate (301) are the same, and the thickness of the extrusion block B (604) is the same as the thickness of the movable plate (305).

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