An assembly line for the production of a refrigerated tank

Abstract

The application provides an assembly production line for a refrigeration tank body, and belongs to the technical field of refrigeration tank body production, and comprises a refrigeration tank assembly system, a performance test system and an inspection and packaging system. The performance test system comprises a vacuum pumping unit, a leakage detection unit, a shearing and inserting pipe unit, a code scanning unit, a high-pressure test unit and a refrigeration test unit. The shearing and inserting pipe unit, the code scanning unit, the high-pressure test unit and the refrigeration test unit are sequentially arranged from right to left. The vacuum pumping unit is arranged in front of the shearing and inserting pipe unit. The leakage detection unit is arranged at the rightmost end. The left side of the leakage detection unit is connected with the vacuum pumping unit and the shearing and inserting pipe unit at the front and back ends, respectively. Through the refrigeration tank assembly system, the performance test system and the inspection and packaging system, the assembly, test and packaging of the refrigeration tank body are all automated, manual operation is not needed, the labor cost is reduced, and the production efficiency is higher.

Description

Technical Field

[0001] This invention belongs to the field of refrigeration tank manufacturing technology, specifically an assembly line for refrigeration tanks. Background Technology

[0002] A refrigeration tank is a device used to cool liquids. It consists of a tank body and a refrigeration unit. The tank body includes an inner tank and an outer tank. The inner tank is generally equipped with a stirrer to prevent the liquid from solidifying and to cool the liquid evenly. An insulation layer is provided between the inner and outer tanks. The outer side of the inner tank is equipped with a refrigerant layer to contain the refrigerant. The refrigeration unit is connected to the refrigerant layer. By vaporizing the refrigerant in the refrigerant layer, it absorbs heat from the inner tank and lowers the temperature of the inner tank. Users start the refrigeration unit to cool the refrigeration tank and refrigerate and preserve the liquid inside.

[0003] In the existing technology, during the production process of refrigeration tanks, such as when testing the assembled tanks, manual operation of the tanks is still required. This results in high workload for workers, high production costs, and low efficiency. Furthermore, under high workload, human error is more likely, making it easier for defective products to be mixed into the finished products, affecting subsequent use and sales.

[0004] Therefore, we propose an assembly line for refrigeration tanks to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that during the production process of refrigeration tanks, such as when testing the assembled tanks, manual operation is still required, which leads to high workload for workers, high production costs, low efficiency, and under high workload, human error is more likely to occur, making it easier for defective products to be mixed into the finished products, affecting subsequent use and sales. Therefore, this invention proposes an assembly line for refrigeration tanks.

[0006] The objective of this invention can be achieved through the following technical solution: a refrigeration tank assembly system, a performance testing system, and an inspection and packaging system. The performance testing system includes a vacuuming unit, a leak detection unit, a cutting and inserting unit, a barcode scanning unit, a high-pressure testing unit, and a refrigeration testing unit. The cutting and inserting unit, barcode scanning unit, high-pressure testing unit, and refrigeration testing unit are arranged sequentially from right to left. The vacuuming unit is located in front of the cutting and inserting unit, and the leak detection unit is located at the rightmost end. The front and rear ends of the left side of the leak detection unit are connected to the vacuuming unit and the cutting and inserting unit, respectively.

[0007] The high-voltage testing unit includes a high-voltage testing chamber. A left roller conveyor is installed at the front of the high-voltage testing chamber. A lifting cylinder is installed inside the left roller conveyor via a support column. A lifting seat is installed at the upper end of the lifting cylinder. Transfer mechanisms two are installed on both the left and right sides of the upper surface of the lifting seat. A synchronous belt is installed inside the high-voltage testing chamber and is located behind the transfer mechanisms two. A power mounting plate one, a power mounting plate two, a photoelectric switch one, a photoelectric switch two, and a limit plate are installed above the synchronous belt. An electric telescopic rod is installed on the inner wall of the rear top of the high-voltage testing chamber. A telescopic cylinder is installed at the left end of the electric telescopic rod, and the lower end of the telescopic cylinder is connected to the limit plate.

[0008] In a preferred embodiment of the present invention, the first power supply mounting plate and the first photoelectric switch are both disposed on the inner wall of the front end of the high-voltage test chamber, the second power supply mounting plate is disposed on the inner wall of the right side of the high-voltage test chamber, the second photoelectric switch is disposed on the inner top wall of the rear side of the high-voltage test chamber, a moving track is provided on the inner wall of the rear side of the high-voltage test chamber, and the rear end of the telescopic cylinder is slidably mounted on the front end of the moving track via a slider.

[0009] In a preferred embodiment of the present invention, the high-pressure test chamber has feeding windows on both the front and rear sides, and the bottom of the feeding windows is on the same horizontal plane as the synchronous belt. The front outer wall of the high-pressure test chamber is in contact with the rear outer wall of the left roller conveyor, and an indicator light is provided on the upper surface of the high-pressure test chamber.

[0010] In a preferred embodiment of the present invention, the leakage detection unit includes a mounting frame. The right end of the left roller conveyor is located inside the lower end of the mounting frame, and a connecting base is located at the front end of the left roller conveyor. A right roller conveyor is located at the front end of the connecting base. Side mounting seats are located at the front end of the right roller conveyor and the rear side of the left roller conveyor. A transfer mechanism is located on the upper surface of both sets of side mounting seats. Front and rear conveying mechanisms are located inside the upper right side of the right roller conveyor, inside the upper right side of the left roller conveyor, and on the upper surface of the connecting base. A vacuum pump is located on the upper surface of the mounting frame, and several sets of vacuum pumps are provided. An air inlet pipe is located at the lower end of the vacuum pump. The front and rear sets of air inlet pipes are located above the right side of the right roller conveyor and above the right side of the left roller conveyor, respectively.

[0011] In a preferred embodiment of the present invention, the refrigeration tank assembly system includes a hot-fix nut unit, a condenser assembly unit, a fan cotton assembly unit, an assembly line unit, a fixing line unit, a foot pad foam assembly unit, a hot tank assembly unit, and an assembly tube assembly unit. The hot-fix nut unit, condenser assembly unit, fan cotton assembly unit, assembly line unit, fixing line unit, foot pad foam assembly unit, hot tank assembly unit, and tube assembly unit are arranged sequentially from left to right. The right end of the tube assembly unit is connected to the left end of the vacuum unit.

[0012] In a preferred embodiment of the present invention, the inspection and packaging system includes an appearance inspection unit and a packaging unit, which are arranged sequentially from right to left, and the right end of the appearance inspection unit is connected to the left end of the refrigeration test unit.

[0013] In a preferred embodiment of the present invention, workpiece stoppers are provided at the middle of the upper end of the right roller conveyor and at the middle of the upper end of the left roller conveyor, and the workpiece stopper array consists of several such stoppers.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] (1) By setting up a refrigeration tank assembly system, performance testing system and inspection and packaging system, the assembly, testing and packaging of refrigeration tanks are automated, reducing manual operation, lowering labor costs and increasing production efficiency;

[0016] (2) The leak detection unit can be set up to perform secondary inspection of the tank, which improves the inspection efficiency and quality of the tank and prevents defective products from entering the subsequent work and affecting the work quality.

[0017] (3) The high-pressure test unit can automatically test the tank without manual operation, which is highly efficient and safe. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the production line of the present invention;

[0020] Figure 2 This is a three-dimensional structural schematic diagram of the leakage detection unit of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the high-voltage testing unit of the present invention;

[0022] Figure 4 This is a cross-sectional three-dimensional structural diagram of the high-voltage testing unit of the present invention;

[0023] Figure 5 This is a structural diagram of the high-voltage detection box of the present invention.

[0024] In the diagram: 1. Heating nut unit; 2. Condenser assembly unit; 3. Fan cotton assembly unit; 4. Assembly line unit; 5. Fixing line unit; 6. Foot pad foam assembly unit; 7. Hot tank assembly unit; 8. Tubing assembly unit; 9. Vacuuming unit; 10. Leak detection unit; 1001. Mounting bracket; 1002. Vacuum pump; 1003. Gas inlet pipe; 1004. Side mounting base; 1005. Transfer mechanism one; 1006. Front and rear conveying mechanism; 11. Tubing cutting unit; 12. Barcode scanning unit; 13. High-voltage testing unit; 1301. High-voltage testing chamber; 1302. Support. Column; 1303, Lifting Cylinder; 1304, Lifting Seat; 1305, Transfer Mechanism II; 1306, Synchronous Belt; 1307, Power Supply Mounting Plate I; 1308, Power Supply Mounting Plate II; 1309, Photoelectric Switch I; 1310, Photoelectric Switch II; 1311, Electric Telescopic Rod; 1312, Telescopic Cylinder; 1313, Limit Plate; 1314, Moving Track; 1315, Signal Light; 14, Refrigeration Test Unit; 15, Appearance Inspection Unit; 16, Packaging Unit; 17, Right Roller Conveyor; 18, Connecting Base; 19, Left Roller Conveyor; 20, Workpiece Stopper. Detailed Implementation

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example:

[0027] Please see Figure 1 - Figure 5As shown, an assembly line for refrigeration tanks includes a refrigeration tank assembly system, a performance testing system, and an inspection and packaging system. The refrigeration tank assembly system includes a heat-sealing nut unit 1, a condenser assembly unit 2, a fan cotton assembly unit 3, an assembly line unit 4, a fixing line unit 5, a foot pad foam assembly unit 6, a hot-tank assembly unit 7, and an assembly tube insertion unit 8. From left to right, the following units are arranged in sequence: the heating nut unit 1 can heat the nuts on the tank body for easy assembly and disassembly; the condenser assembly unit 2, the fan cotton assembly unit 3, the wire assembly unit 4, the foot pad foam assembly unit 6, and the hot tank assembly unit 7 can install the condenser, fan cotton, wire, foot pad, foam, and hot tank inside the tank body in sequence; the wire fixing unit 5 can fix the wires installed inside the tank body to prevent the wires from moving and getting tangled, thus affecting use; and the tube assembly unit 8 can install the tubes on the tank body, thereby facilitating subsequent testing of the tank body.

[0028] The performance testing system includes a vacuuming unit 9, a leak detection unit 10, a shearing and insertion unit 11, a barcode scanning unit 12, a high-pressure testing unit 13, and a refrigeration testing unit 14. The right end of the assembly and insertion unit 8 is connected to the left end of the vacuuming unit 9. The shearing and insertion unit 11, barcode scanning unit 12, high-pressure testing unit 13, and refrigeration testing unit 14 are arranged sequentially from right to left. The vacuuming unit 9 is located in front of the shearing and insertion unit 11. The vacuuming unit 9 can extract air from the inside of the tank, thereby facilitating the subsequent detection work of the leak detection unit 10. The leak detection unit 10 is located at the rightmost end, and its left front and rear ends are connected to the vacuuming unit 9 and the shearing and insertion unit 11, respectively. The tube-cutting unit 11 is connected to the can body. The tube-cutting unit 11 can cut off the excess tube on the can body to avoid the tube being too long and affecting the use of the can body. The inspection and packaging system includes an appearance inspection unit 15 and a packaging unit 16, which are arranged from right to left. The right end of the appearance inspection unit 15 is connected to the left end of the refrigeration test unit 14. The appearance inspection unit 15 can inspect the appearance of the can body, thereby detecting whether the can body has cracks or damage in the high pressure test and refrigeration test, so as to select out the defective products and prevent the defective products from entering the market. The packaging unit 16 can package the qualified finished can bodies for subsequent transportation and use.

[0029] The leakage detection unit 10 includes a mounting frame 1001. The right end of the left roller conveyor 19 is located inside the lower end of the mounting frame 1001, and a connecting base 18 is located at the front end of the left roller conveyor 19. A right roller conveyor 17 is located at the front end of the connecting base 18. Side mounting seats 1004 are located at the front end of the right roller conveyor 17 and the rear side of the left roller conveyor 19. A transfer mechanism 1005 is located on the upper surface of both sets of side mounting seats 1004. The upper right side of the right roller conveyor 17, the upper right side of the left roller conveyor 19, and the connecting base 1004 are all located inside the mounting frame 1001. The upper surface of 8 is provided with front and rear conveying mechanisms 1006, and the upper surface of the mounting frame 1001 is provided with vacuum pumps 1002, and several sets of vacuum pumps 1002 are provided. The lower end of the vacuum pumps 1002 is provided with air inlet pipes 1003. The front and rear sets of air inlet pipes 1003 are respectively located on the upper right side of the right roller conveyor 17 and the upper right side of the left roller conveyor 19. A set of vacuum pumps 1002 is provided on the upper right side of both the right roller conveyor 17 and the left roller conveyor 19, which can perform secondary inspection of the tank, improve the inspection quality of the tank, and reduce the probability of defective products passing through.

[0030] The front and rear sides of the connecting base 18 are respectively attached to the right roller conveyor 17 and the left roller conveyor 19 to reduce the distance between the connecting base 18 and the conveyors, so that the placement base and the tank on the right roller conveyor 17 can be smoothly transferred to the connecting base 18. Then, the placement base and the tank are smoothly transported to the left roller conveyor 19 by the front and rear conveying mechanism 1006 on the connecting base 18.

[0031] The high-voltage testing unit 13 includes a high-voltage testing chamber 1301. A left roller conveyor 19 is installed in front of the high-voltage testing chamber 1301. A lifting cylinder 1303 is installed inside the left roller conveyor 19 via a support column 1302. A lifting seat 1304 is installed at the upper end of the lifting cylinder 1303. Transfer mechanisms 1305 are installed on both the left and right sides of the upper surface of the lifting seat 1304. A synchronous belt 1306 is installed inside the high-voltage testing chamber 1301. 06 is set on the rear side of the transfer mechanism 2 1305. Above the synchronous belt 1306 are the power installation plate 1 1307, the power installation plate 2 1308, the photoelectric switch 1 1309, the photoelectric switch 2 1310 and the limit plate 1313. The inner wall of the rear side of the top of the high voltage test chamber 1301 is equipped with an electric telescopic rod 1311. The left end of the electric telescopic rod 1311 is equipped with a telescopic cylinder 1312. The lower end of the telescopic cylinder 1312 is connected to the limit plate 1313.

[0032] In the initial state, the conveyor belt of the second transfer mechanism 1305 is lower than the height of the roller of the left roller conveyor 19. That is, when the left roller conveyor 19 transports the placement base to the left, the placement base will not come into contact with the second transfer mechanism 1305 and cause frictional displacement. When the placement base needs to be moved into the high-voltage test chamber 1301, the lifting cylinder 1303 will first move the conveyor belt of the second transfer mechanism 1305 upward to the same height as the synchronous belt 1306, and then the placement base can be smoothly moved onto the synchronous belt 1306. The placement base can also be moved back onto the second transfer mechanism 1305 through the synchronous belt 1306.

[0033] Power mounting plate 1307 and photoelectric switch 1309 are both installed on the inner wall of the front end of the high-voltage test chamber 1301. Power mounting plate 2 1308 is installed on the inner wall of the right side of the high-voltage test chamber 1301. Photoelectric switch 2 1310 is installed on the inner top wall of the rear side of the high-voltage test chamber 1301. A moving track 1314 is provided on the inner wall of the rear side of the high-voltage test chamber 1301. The rear end of the telescopic cylinder 1312 is slidably installed on the front end of the moving track 1314 via a slider. The moving track 1314 can limit the moving position of the telescopic cylinder 1312, so that the telescopic cylinder 1312 can move smoothly left and right horizontally. In turn, the limiting plate 1313 can adjust the position of the tank and limit the tank.

[0034] Feeding windows are provided on both the front and rear sides of the high-pressure test chamber 1301, and the bottom of the feeding windows is on the same horizontal plane as the synchronous belt 1306. The front outer wall of the high-pressure test chamber 1301 is in contact with the rear outer wall of the left roller conveyor 19. The feeding windows facilitate the placement of the base and the tank into or out of the high-pressure test chamber 1301. An indicator light 1315 is provided on the upper surface of the high-pressure test chamber 1301. The indicator light 1315 facilitates the observation of whether the high-pressure test chamber 1301 is operating normally. Workpiece stoppers 20 are provided at the middle of the upper end of the right roller conveyor 17 and the middle of the upper end of the left roller conveyor 19. Several workpiece stoppers 20 are arranged in an array. The main function of the workpiece stoppers 20 is to stop the tank at the corresponding operating position. During the automatic transfer of the tank, the workpiece stoppers 20 prevent the tank from moving, ensuring that the tank can accurately stop at the designated operating position, thereby ensuring that subsequent processing or assembly work can proceed smoothly.

[0035] When using this invention, the refrigeration tank body is first placed on the placement base on the right roller conveyor 17 at the leftmost end of the right roller conveyor 17. Then, when the right roller conveyor 17 is working, it can drive the placement base and the tank body to the right. After passing through the refrigeration tank assembly system, the tank body can be automatically assembled by heating the nut, assembling the condenser, assembling the fan cotton, assembling the wire, fixing the wire, assembling the foot pad and foam, assembling the hot tank, and inserting the vent pipe.

[0036] Next, the tank is moved to the vacuum unit 9 under the operation of the right roller conveyor 17 for vacuuming, and then moved to the leak detection unit 10. The vacuum pump 1002 and the air inlet pipe 1003 test the tank for leaks. When a defective product is detected, the front-rear conveying mechanism 1006 on the right roller conveyor 17 moves the defective product forward to the side mounting base 1004. Then, the transfer mechanism 1005 on the side mounting base 1004 sends the defective product forward. Qualified products pass through the front-rear conveyor... The conveying mechanism 1006 transports the tank to the upper right side of the left roller conveyor 19. Then, the vacuum pump 1002 and air inlet pipe 1003 on the upper right side of the left roller conveyor 19 inspect the tank again. If the tank fails, it moves to the side mounting seat 1004 behind the front and rear conveying mechanism 1006. If the tank passes, it is transported to the left by the left roller conveyor 19. After passing through the tube cutting unit 11, the excess tube on the tank is cut off. After passing through the barcode scanning unit 12, the tank is scanned and the data is recorded.

[0037] Then, when the tank is transferred to the high-pressure test unit 13, the placement base moves to the upper surface of the transfer mechanism 1305. At the same time, the lifting cylinder 1303 is activated. The lifting cylinder 1303 drives the lifting seat 1304, the transfer mechanism 1305 and the placement base to move upward, so that the transfer mechanism 1305 is flush with the synchronous belt 1306. Then the transfer mechanism 1305 and the synchronous belt 1306 work to move the placement base and the tank backward onto the synchronous belt 1306. Then the telescopic cylinder 1312 is activated. The telescopic cylinder 1312 drives the limit plate 1313 to move horizontally, adjusts and limits the tank, so that the tank can be tested under high pressure. After the test is completed, the synchronous belt 1306 and the transfer mechanism 1305 work again to move the placement base and the tank back onto the left roller conveyor 19.

[0038] Next, the left roller conveyor 19 moves the placement base and the can to the left to the refrigeration test unit 14 for refrigeration testing. Then it moves to the appearance inspection unit 15 to observe whether the appearance of the can has cracked or been damaged due to high pressure or refrigeration testing. If it fails, it will be removed at the appearance inspection unit 15. If it passes, it will continue to be moved to the packaging unit 16 for packaging for subsequent use.

[0039] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An assembly line for refrigeration tanks, comprising a refrigeration tank assembly system, a performance testing system, and an inspection and packaging system, characterized in that, The performance testing system includes a vacuum unit (9), a leak detection unit (10), a cutting and inserting unit (11), a barcode scanning unit (12), a high-pressure testing unit (13), and a refrigeration testing unit (14). The cutting and inserting unit (11), the barcode scanning unit (12), the high-pressure testing unit (13), and the refrigeration testing unit (14) are arranged sequentially from right to left. The vacuum unit (9) is located in front of the cutting and inserting unit (11), and the leak detection unit (10) is located at the rightmost end. The front and rear ends of the left side of the leak detection unit (10) are connected to the vacuum unit (9) and the cutting and inserting unit (11), respectively. The high-voltage testing unit (13) includes a high-voltage testing chamber (1301). A left roller conveyor (19) is installed in front of the high-voltage testing chamber (1301). A lifting cylinder (1303) is installed inside the left roller conveyor (19) via a support column (1302). A lifting seat (1304) is installed at the upper end of the lifting cylinder (1303). Transfer mechanisms (1305) are installed on both the left and right sides of the upper surface of the lifting seat (1304). The interior of the chamber (1301) is equipped with a synchronous belt (1306). Above the synchronous belt (1306) are a power mounting plate one (1307), a power mounting plate two (1308), a photoelectric switch one (1309), a photoelectric switch two (1310), and a limiting plate (1313). An electric telescopic rod (1311) is installed on the inner wall of the rear top of the high voltage test chamber (1301). A telescopic cylinder (1312) is installed at the left end of the electric telescopic rod (1311).

2. The assembly line for refrigeration tanks according to claim 1, characterized in that, The power mounting plate one (1307) and photoelectric switch one (1309) are both installed on the inner wall of the front end of the high voltage test chamber (1301). The power mounting plate two (1308) is installed on the inner wall of the right side of the high voltage test chamber (1301). The photoelectric switch two (1310) is installed on the inner top wall of the rear side of the high voltage test chamber (1301). The inner wall of the rear side of the high voltage test chamber (1301) is provided with a moving track (1314). The rear end of the telescopic cylinder (1312) is slidably installed on the front end of the moving track (1314) by a slider.

3. The assembly line for refrigeration tanks according to claim 1, characterized in that, The high-pressure test chamber (1301) has feeding windows on both the front and rear sides, and the bottom of the feeding windows is on the same horizontal plane as the synchronous belt (1306). The front outer wall of the high-pressure test chamber (1301) is in contact with the rear outer wall of the left roller conveyor (19). The upper surface of the high-pressure test chamber (1301) is provided with a signal light (1315).

4. The assembly line for refrigeration tanks according to claim 1, characterized in that, The leakage detection unit (10) includes a mounting bracket (1001). The right end of the left roller conveyor (19) is located inside the lower end of the mounting bracket (1001), and a connecting base (18) is provided at the front end of the left roller conveyor (19). A right roller conveyor (17) is provided at the front end of the connecting base (18). Side mounting seats (1004) are provided at the front end of the right roller conveyor (17) and the rear side of the left roller conveyor (19). The upper surface of the side mounting base (1004) is provided with a transfer mechanism (1005). The upper right side of the right roller conveyor (17), the upper right side of the left roller conveyor (19), and the upper surface of the connecting base (18) are all provided with front and rear conveying mechanisms (1006). The upper surface of the mounting frame (1001) is provided with a vacuum pump (1002). The lower end of the vacuum pump (1002) is provided with an air inlet pipe (1003).

5. The assembly line for refrigeration tanks according to claim 4, characterized in that, The refrigeration tank assembly system includes a hot-fix nut unit (1), a condenser assembly unit (2), a fan cotton assembly unit (3), an assembly line unit (4), a fixing line unit (5), a foot pad foam assembly unit (6), a hot tank assembly unit (7), and an assembly tube assembly unit (8). The hot-fix nut unit (1), condenser assembly unit (2), fan cotton assembly unit (3), assembly line unit (4), fixing line unit (5), foot pad foam assembly unit (6), hot tank assembly unit (7), and tube assembly unit (8) are arranged sequentially from left to right. The right end of the tube assembly unit (8) is connected to the left end of the vacuum unit (9).

6. The assembly line for refrigeration tanks according to claim 1, characterized in that, The inspection and packaging system includes an appearance inspection unit (15) and a packaging unit (16), and the appearance inspection unit (15) and the packaging unit (16) are arranged sequentially from right to left. The right end of the appearance inspection unit (15) is connected to the left end of the refrigeration test unit (14).

7. The assembly line for refrigeration tanks according to claim 4, characterized in that, Workpiece stoppers (20) are provided at the middle of the upper end of the right roller conveyor (17) and at the middle of the upper end of the left roller conveyor (19), and the array of workpiece stoppers (20) consists of several such stoppers.

8. The assembly line for refrigeration tanks according to claim 1, characterized in that, The synchronous belt (1306) is located on the rear side of the second transfer mechanism (1305); the lower end of the telescopic cylinder (1312) is connected to the limiting plate (1313).

9. The assembly line for refrigeration tanks according to claim 4, characterized in that, The vacuum pump (1002) is provided with several sets; the front and rear sets of air inlet pipes (1003) are respectively located above the right side of the right roller conveyor (17) and above the right side of the left roller conveyor (19).

10. The assembly line for refrigeration tanks according to claim 1, characterized in that, The initial state of the conveyor belt of the second transfer mechanism (1305) is lower than the height of the roller of the left roller conveyor (19).

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