A connection structure of a refrigerator evaporator joint

Abstract

The utility model discloses a refrigerator evaporator joint's connecting structure relates to evaporator processing technical field, the utility model discloses a aluminium pipe, and the outer connecting pipe of setting at its both ends top, the outer wall end part of aluminium pipe and outer connecting pipe all solidly is equipped with the fixed ring, is provided with the center plate between aluminium pipe and outer connecting pipe, the bottom and top center position of center plate all are installed hollow telescopic pipe, and the both side wall center position of center plate respectively solidly is equipped with first support plate and second support plate, and the bearing on first support plate rotates and installs the screw rod, and the outside of docking cylinder is provided with limiting component. The utility model discloses through screw rod and limiting component can automatically complete the connecting purpose of aluminium pipe and outer connecting pipe, and the staff is convenient to carry out the dismounting operation fast, and the work efficiency is high, and utilize center plate, docking cylinder and screw rod to facilitate staff to replace sealing washer, need not to remove evaporator, can replace in the refrigerator inside, reduce the work load.

Description

Technical Field

[0001] This utility model belongs to the field of evaporator processing technology, and in particular relates to a connection structure for a refrigerator evaporator connector. Background Technology

[0002] The evaporator is one of the core components of a refrigerator's refrigeration system, often referred to as the "heart of the refrigeration system." It is a heat exchanger whose core function is "heat absorption." Evaporators mainly include: tube-plate evaporators, finned coil evaporators, and blown evaporators. Among them, the evaporator joint is a key node connecting the evaporator to other parts of the refrigerator's refrigeration system (such as the compressor, capillary tube, and return pipe). The reliability and sealing of its connection directly determine the refrigerator's lifespan and performance.

[0003] A search revealed that publication number CN218510353U, with an application date of July 28, 2022, discloses a connection structure for connecting an evaporator aluminum tube and a compressor return pipe in a refrigerator. The connection assembly includes a locking ring, an evaporator outer sleeve, a compressor return pipe, an evaporator aluminum tube, and a protective tube. The locking ring tightly fits the compressor return pipe and the evaporator outer sleeve to form a circumferentially overlapping compression seal. This design is simple to operate, and the sealing fluid can fill the small grooves between the evaporator outer sleeve and the compressor return pipe, improving sealing performance. Since the compressor return pipe is made of copper and the evaporator outlet pipe is made of aluminum, the overlapping connection of these two materials would lead to potential difference corrosion. The solidified sealing fluid layer, located between the overlapping surfaces of these two materials, isolates the two metals from direct contact. The protective tube prevents the connection from entering with external air and condensate, minimizing the necessary conditions for potential difference corrosion and improving overall corrosion resistance and sealing performance.

[0004] However, it still has the following drawbacks in practical use: The existing connection structure of refrigerator evaporator joints is mostly the traditional welding method. This method can lead to thinning of the pipe wall or even burn-through. In addition, residual flux can corrode the joint, posing a risk of leakage. Furthermore, the operation is cumbersome and the work efficiency is low. 2. Existing refrigerator evaporator connector connections require complete removal of the evaporator from the refrigerator after a leak, which is labor-intensive and inconvenient for maintenance. Therefore, we provide a new refrigerator evaporator connector connection structure to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this utility model is to provide a connection structure for a refrigerator evaporator connector. By setting a screw and a limiting component, the connection between the aluminum tube and the outer pipe can be automatically completed through the gas flow of the air cylinder and air pump during the process of pushing the two docking cylinders outward with the screw. This facilitates quick disassembly and assembly operations for workers, saving time and effort and increasing work efficiency. Furthermore, by using a center plate, docking cylinders, and a screw, the distance between the two docking cylinders can be adjusted with the screw to quickly disassemble and assemble the connection structure. This also makes it convenient for workers to replace the sealing ring without removing the evaporator, as it can be replaced inside the refrigerator, reducing workload.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a connection structure for a refrigerator evaporator connector, including an aluminum tube and an outer connecting pipe disposed above both ends of the aluminum tube and the outer connecting pipe. The outer wall ends of both the aluminum tube and the outer connecting pipe are fixed with fixing rings. A central plate is disposed between the aluminum tube and the outer connecting pipe. Hollow telescopic tubes are installed at the bottom and top center positions of the central plate. A docking cylinder is installed at the end of the hollow telescopic tube. A first support plate and a second support plate are fixed at the center positions of the two side walls of the central plate, respectively. A first side plate and a second side plate are fixed at the ends of the two side walls of the docking cylinder, respectively. A screw is rotatably mounted in the bearing on the first support plate. A limit component is disposed on the outer side of the docking cylinder. The limiting assembly includes a guide rod fixed at the center of the second support plate, and a first connecting plate fixed at both ends of the guide rod.

[0007] The present invention is further provided that a sealing ring is bonded inside the docking cylinder, and square holes are provided at the center of the front and rear end faces of the docking cylinder.

[0008] The present invention is further configured such that the bottom end of the screw spirally passes through the threaded hole on the adjacent first side plate and connects to the limiting plate, and the top end of the screw spirally passes through the threaded hole on the adjacent first side plate and connects to the knob.

[0009] The present invention is further configured such that the guide rod is slidably installed in the sliding hole of the second side plate, the bottom rear end of the first connecting plate is fixedly provided with a connecting rod, and the other end of the connecting rod is installed with a second connecting plate.

[0010] The present invention is further configured such that a piston rod is fixedly provided at the top front end of the second connecting plate, and a rubber plug is installed at the other end of the piston rod, the rubber plug being slidably installed inside the air cylinder.

[0011] The present invention is further configured such that the air cylinder is installed on the outer wall of the docking cylinder, the front end of the air cylinder is provided with an air pipe, the other end of the air pipe is connected to the first connecting pipe through a pipe joint, and the other end of the first connecting pipe is connected to the second connecting pipe and the third connecting pipe through a tee joint.

[0012] The present invention is further configured such that the other ends of the second connecting pipe and the third connecting pipe are connected to the cylinder through pipe joints, and a block is installed on the telescopic end of the cylinder, and the block is slidably installed on the inner wall of the square hole.

[0013] This utility model has the following beneficial effects: This invention, by setting a screw and a limiting component, utilizes the process of the screw pushing two connecting cylinders outward to automatically complete the connection between the aluminum tube and the outer connecting pipe through the gas flow of the air cylinder and air pump. This facilitates quick assembly and disassembly operations for workers, saving time and effort, and increasing work efficiency. It solves the problems of existing refrigerator evaporator joint connection structures, which mostly use traditional welding methods. This method can lead to thinning or even burn-through of the pipe wall, and residual flux can corrode the joint, posing a risk of leakage. In addition, the operation is cumbersome and the work efficiency is low.

[0014] This utility model, by setting a center plate, connecting cylinders, and screws, and using the screws to adjust the distance between the two connecting cylinders, quickly realizes the disassembly and assembly of the connection structure. This makes it convenient for staff to replace the sealing rings, and it can be replaced inside the refrigerator without removing the evaporator, reducing workload. It solves the problem that the existing refrigerator evaporator joint connection structure requires the entire evaporator to be removed from the refrigerator after leakage, which is labor-intensive and inconvenient for maintenance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the connection structure of a refrigerator evaporator connector.

[0017] Figure 2 This is a structural diagram of the aluminum tube and the outer connecting pipe.

[0018] Figure 3 This is a structural diagram of the central plate.

[0019] Figure 4 Cross-sectional view of the center plate and the connecting tube. Figure 1 .

[0020] Figure 5 Cross-sectional view of the center plate and the connecting tube. Figure 2 .

[0021] Figure 6 This is a disassembled diagram of the limit component.

[0022] The attached diagram lists the components represented by each number as follows: 100-Aluminum tube, 101-Fixing ring, 200-Outer tube, 300-Center plate, 301-First support plate, 302-Second support plate, 303-Hollow telescopic tube, 304-Connecting cylinder, 304a-First side plate, 304b-Second side plate, 304c-Sealing ring, 304d-Square hole, 305-Screw, 305a-Limiting plate, 305b-Knob, 400-Limiting assembly, 401-Guide rod, 402-First connecting plate, 402a-Connecting rod, 403-Second connecting plate, 404-Piston rod, 404a-Rubber plug, 405-Air cylinder, 405a-Air pipe, 405b-First connecting pipe, 405c-Second connecting pipe, 405d-Third connecting pipe, 406-Cylinder, 407-Square block. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example 1

[0024] Please see Figures 1 to 5 This utility model is a connection structure for a refrigerator evaporator connector, including an aluminum tube 100 and an outer connecting pipe 200 disposed above both ends of the aluminum tube 100 and the outer connecting pipe 200. A fixing ring 101 is fixedly provided at the outer wall end of both the aluminum tube 100 and the outer connecting pipe 200. A central plate 300 is provided between the aluminum tube 100 and the outer connecting pipe 200. A hollow telescopic tube 303 is installed at the center of the bottom and top of the central plate 300. A docking cylinder 304 is installed at the end of the hollow telescopic tube 303. A first support plate 301 and a second support plate 302 are fixedly provided at the center of the two side walls of the central plate 300, respectively. A first side plate 304a and a second side plate 304b are fixedly provided at the end of the two side walls of the docking cylinder 304, respectively. A screw 305 is rotatably installed in the bearing on the first support plate 301.

[0025] Specifically, a sealing ring 304c is bonded inside the docking cylinder 304, and square holes 304d are opened at the center of the front and rear end faces of the docking cylinder 304; the bottom end of the screw 305 is spirally passed through the threaded hole on the adjacent first side plate 304a and connected to the limiting plate 305a, and the top end of the screw 305 is spirally passed through the threaded hole on the adjacent first side plate 304a and connected to the knob 305b.

[0026] Furthermore, the external pipe 200 mainly includes the compressor, capillary tube, and return pipe in the refrigerator, and is mainly used to connect with the evaporator aluminum tube 100. The hollow telescopic tube 303 is hollow inside and can be telescopically adjusted. The screw 305 is rotatably installed on the first support plate 301. The screw 305 is screwed into the threaded holes on the upper and lower first side plates 304a. When the screw 305 rotates, it can drive the two first support plates 301 to move in opposite directions, so as to adjust the distance between the two docking cylinders 304. The sealing ring 304c is compressed between the aluminum tube 100 and the docking cylinder 304 and between the docking cylinder 304 and the external pipe 200, which plays a sealing role.

[0027] The operation process in this embodiment is as follows: When installing the refrigerator evaporator, the evaporator aluminum tube 100 needs to be connected to the compressor, capillary tube, return pipe, etc. in the refrigerator. When this connection structure is not in use, both hollow telescopic tubes 303 are in a retracted state, and the docking cylinders 304 on both sides are close to the center plate 300. During connection, the center plate 300 and the two docking cylinders 304 are placed between the aluminum tube 100 and the outer connecting pipe 200. Then, the knob 305b is rotated, and the knob 305b is driven by force to rotate the screw 305. The screw 305 is rotatably mounted in the bearing on the first support plate 301. The external thread on the outer wall of the screw 305 is screwed into the threaded hole on the first side plate 304a on the outer wall of the mating cylinder 304. Therefore, the rotation of the screw 305, under the action of the thread, can cause the first side plates 304a on the two mating cylinders 304 to move in opposite directions. At this time, the two mating cylinders 304 will continuously move away from the center plate 300, and the two mating cylinders 304 are respectively sleeved on the outer walls of the aluminum tube 100 and the outer tube 200, with the sealing ring... When 304c is exposed to low temperature and oil immersion (compressor lubricating oil) for a long time, it may harden, crack, and lose elasticity, leading to leakage. Therefore, it is necessary to replace the sealing ring 304c inside the docking cylinder 304. At this time, rotate the knob 305b in the reverse direction. The knob 305b drives the screw 305 to rotate in the reverse direction. Under the action of the thread, the first side plates 304a on the two docking cylinders 304 move towards each other and bring the two docking cylinders 304 closer to the center plate 300. During this process, the rubber plug 404a and the air cylinder 405... While still in relative motion, the gas in cylinder 406 is drawn back into cylinder 405 through various pipes, causing block 407 to retract into square hole 304d, releasing the limiting effect on fixing ring 101. Then, the two docking cylinders 304 are fully close to center plate 300. Then, center plate 300 and docking cylinders 304 can be removed and the internal sealing ring 304c can be replaced. This makes it convenient for workers to replace sealing ring 304c, and there is no need to remove the evaporator. It can be replaced inside the refrigerator, reducing workload. Example 2

[0028] Please see Figure 5 and Figure 6Based on Embodiment 1, the difference from the first embodiment is that a limiting component 400 is provided. The limiting component 400 includes a guide rod 401 fixed at the center of the second support plate 302, and a first connecting plate 402 fixed at both ends of the guide rod 401. This solves the problem that most of the existing refrigerator evaporator joint connection structures are traditional welding methods, which can lead to thinning of the pipe wall or even burn-through. Furthermore, residual flux can corrode the joint, posing a risk of leakage. In addition, the operation is cumbersome and the work efficiency is low.

[0029] Specifically, the guide rod 401 is slidably installed in the sliding hole on the second side plate 304b; a connecting rod 402a is fixedly installed at the bottom rear end of the first connecting plate 402, and a second connecting plate 403 is installed at the other end of the connecting rod 402a; a piston rod 404 is fixedly installed at the top front end of the second connecting plate 403, and a rubber plug 404a is installed at the other end of the piston rod 404, which is slidably installed inside the air cylinder 405; the air cylinder 405 is installed on the outer wall of the docking cylinder 304. The front end of 05 is provided with an air pipe 405a. The other end of the air pipe 405a is connected to the first connecting pipe 405b through a pipe connector. The other end of the first connecting pipe 405b is connected to the second connecting pipe 405c and the third connecting pipe 405d through a tee connector. The other ends of the second connecting pipe 405c and the third connecting pipe 405d are connected to the cylinder 406 through pipe connectors. The telescopic end of the cylinder 406 is equipped with a block 407, which is slidably installed on the inner wall of the square hole 304d.

[0030] Furthermore, the guide rod 401 is fixed to the second support plate 302, while the two second side plates 304b are slidably sleeved on the outer wall of the guide rod 401, serving to guide and assist the sliding of the docking cylinder 304. The air cylinder 405 and the cylinder 406 are connected by multiple pipes. As the two docking cylinders 304 continuously move closer to the ends of the aluminum tube 100 and the outer tube 200, the gas in the air cylinder 405 is continuously forced into the cylinder 406. During this process, the block 407 does not enter the docking cylinder 304. 04 Inside, it will not obstruct or affect the movement of the fixing ring 101 on the aluminum tube 100 and the outer tube 200. When the fixing ring 101 on the aluminum tube 100 and the outer tube 200 passes the position of the square 407 and squeezes the sealing ring 304c, at this time, the gas in the cylinder 406 is sufficient to push the square 407 to the outside of the fixing ring 101, which plays a limiting role. Thus, reliable limiting is achieved after the connection is completed, and the square 407 is prevented from obstructing the insertion of the aluminum tube 100 and the outer tube 200 during the connection process.

[0031] The operation process of this embodiment is as follows: when the two docking cylinders 304 move and are sleeved on the outside of the aluminum tube 100 and the outer tube 200, the air cylinder 405 and the rubber plug 404a move relative to each other. However, in the initial and middle stages of this movement, the air pressure in the cylinder 406 may not be sufficient to immediately push the block 407 to extend completely, or the system design (such as air passage volume and resistance) may cause the block 407 to move only slightly without obstructing the passage of the fixing ring 101. When the docking cylinder 304 moves into position, that is, when the ends of the aluminum tube 100 and the outer connecting pipe 200 have been compressed to form a seal with the sealing ring 304c, and the fixing ring 101 on it has completely passed the position of the square hole 304d, the air cylinder 405 continues to be compressed, so that the air pressure in the cylinder 406 is sufficient to fully push the block 407 out, so that it is inserted into the square hole 304d and pressed tightly against the outside of the fixing ring 101, thereby forming an axial limit. After the docking cylinder 304 completes the sealing docking, the block 407 pops out to limit the fixing ring 101, preventing the aluminum tube 100 and the outer connecting pipe 200 from coming out, thereby completing a reliable connection and installation, which is convenient for workers to quickly carry out disassembly and assembly operations, saving time and effort and increasing work efficiency.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A connection structure for a refrigerator evaporator connector, comprising an aluminum tube (100) and external connecting pipes (200) disposed above both ends thereof, wherein a fixing ring (101) is fixedly provided at the outer wall end of both the aluminum tube (100) and the external connecting pipes (200), a center plate (300) is provided between the aluminum tube (100) and the external connecting pipes (200), and a hollow telescopic tube (303) is installed at the bottom and top center positions of the center plate (300), and a connecting cylinder (304) is installed at the end of the hollow telescopic tube (303), characterized in that: A first support plate (301) and a second support plate (302) are fixedly provided at the center positions of the two side walls of the center plate (300), and a first side plate (304a) and a second side plate (304b) are fixedly provided at the ends of the two side walls of the docking cylinder (304), and a screw (305) is rotatably installed in the bearing on the first support plate (301), and a limit assembly (400) is provided on the outer side of the docking cylinder (304). The limiting component (400) includes a guide rod (401) fixed at the center of the second support plate (302) and a first connecting plate (402) fixed at both ends of the guide rod (401).

2. The connection structure of a refrigerator evaporator connector according to claim 1, characterized in that, The inside of the docking cylinder (304) is bonded with a sealing ring (304c), and square holes (304d) are opened at the center of the front and rear end faces of the docking cylinder (304).

3. The connection structure of a refrigerator evaporator connector according to claim 2, characterized in that, The bottom end of the screw (305) is spirally passed through a threaded hole on the adjacent first side plate (304a) and connected to the limiting plate (305a), and the top end of the screw (305) is spirally passed through a threaded hole on the adjacent first side plate (304a) and connected to the knob (305b).

4. The connection structure of a refrigerator evaporator connector according to claim 2, characterized in that, The guide rod (401) is slidably installed in the sliding hole on the second side plate (304b), and the bottom rear end of the first connecting plate (402) is fixed with a connecting rod (402a), and the other end of the connecting rod (402a) is equipped with a second connecting plate (403).

5. The connection structure of a refrigerator evaporator connector according to claim 4, characterized in that, A piston rod (404) is fixedly provided at the top front end of the second connecting plate (403), and a rubber plug (404a) is installed at the other end of the piston rod (404). The rubber plug (404a) is slidably installed inside the air cylinder (405).

6. The connection structure of a refrigerator evaporator connector according to claim 5, characterized in that, The air cylinder (405) is installed on the outer wall of the docking cylinder (304). The front end of the air cylinder (405) is provided with an air pipe (405a). The other end of the air pipe (405a) is connected to the first connecting pipe (405b) through a pipe joint. The other end of the first connecting pipe (405b) is connected to the second connecting pipe (405c) and the third connecting pipe (405d) through a tee joint.

7. The connection structure of a refrigerator evaporator connector according to claim 6, characterized in that, The other ends of the second connecting pipe (405c) and the third connecting pipe (405d) are connected to the cylinder (406) through pipe joints. A block (407) is installed on the telescopic end of the cylinder (406), and the block (407) is slidably installed on the inner wall of the square hole (304d).

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