Refrigerator condenser welding device

Abstract

The application relates to a refrigerator condenser welding device and belongs to the field of refrigeration equipment manufacturing. A hot gradient isolation type limiting component is arranged on a chassis. The hot gradient isolation type limiting component comprises a coil pipe limiting piece and a steel wire limiting piece. The coil pipe limiting piece comprises a supporting seat and a buffer piece arranged on the supporting seat. A supporting groove for placing a coil pipe is arranged on the supporting seat. A plurality of honeycomb openings are arranged on the groove wall of the supporting groove. The buffer piece comprises a ceramic base block and a silica rubber block. The buffer piece is arranged in the honeycomb openings at intervals. The silica rubber block is in contact with the side wall of the coil pipe. The steel wire limiting piece comprises a connecting plate. A V-shaped limiting groove for placing a steel wire is arranged on the connecting plate. A connecting rod is arranged between the connecting plate and the supporting seat. The connecting rod is formed by alternately fixing a ceramic rod and a metal rod. The device has the advantages of improving the positioning precision of the steel wire and improving the manufacturing quality of the condenser.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration equipment manufacturing, and particularly relates to a welding device for a condenser of a refrigerator. BACKGROUND

[0002] A medical refrigerator is a key equipment for storing medicines and medical devices in a hospital, and the heat exchange efficiency of a condenser in the medical refrigerator directly affects the performance and energy consumption of the medical refrigerator. At present, the condenser of the medical refrigerator generally adopts a coil structure, and the coil material is mostly copper pipe. In order to increase the heat dissipation area and improve the heat exchange efficiency, a plurality of steel filaments arranged vertically are usually welded on the surface of the coil to form a "finned tube" heat dissipation structure.

[0003] REFERENCE Figure 1 and Figure 2 The existing welding device generally comprises a welding mechanism 1 and an assembling mechanism. The welding mechanism 1 comprises a welding head movable up and down, and the assembling mechanism comprises a base frame 2 for placing the coil and the steel filaments, a limiting block arranged on the base frame 2 for limiting the position of the coil, a placing frame 19 for placing the steel filaments, and a positioning block for limiting the movement of the steel filaments. The placing frame 19 is provided with a placing groove 20 for placing the steel filaments, and the slot of the placing groove 20 is arranged in an open shape to facilitate the placement of the steel filaments. After the worker manually places the coil and the steel filaments, the coil and the steel filaments are moved to the lower side of the welding head for welding.

[0004] The steel filaments have a small diameter and a large number, and the welding heat in the welding process causes thermal expansion of the steel filaments. Due to the difference in material properties (different elastic modulus and thermal expansion coefficient) between the steel filaments and the coil, welding stress is generated, which causes displacement of the steel filaments, resulting in insufficient positioning accuracy of the steel filaments and difficulty in ensuring the consistency of the welding point position, thereby affecting the quality of the condenser. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the present application aims to provide a welding device for a condenser of a refrigerator, which can improve the positioning accuracy of the steel filaments and improve the manufacturing quality of the condenser.

[0006] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0007] The application discloses a refrigerator condenser welding device, which comprises a chassis, wherein a heat gradient isolation limiting assembly is arranged on the chassis, the heat gradient isolation limiting assembly comprises a coil limiting piece and a steel wire limiting piece, the coil limiting piece comprises a supporting seat and a buffer arranged on the supporting seat, a supporting groove for placing a coil is formed in the supporting seat, the plane where the groove opening of the supporting groove is located is lower than the horizontal plane where the highest point of the vertical section of the coil wall is located, a plurality of honeycomb openings are formed in the groove wall of the supporting groove, the buffer comprises a ceramic base block and a silicone rubber block, the buffer is arranged in the honeycomb opening in a spaced manner, and the silicone rubber block is in contact with the side wall of the coil; the steel wire limiting piece comprises a connecting plate, the plane where the plate surface of the connecting plate is located is higher than the plane where the groove opening of the supporting groove is located, and a V-shaped limiting groove for placing a steel wire is formed in the connecting plate; a connecting rod is arranged between the connecting plate and the supporting seat, the connecting rod is formed by alternately fixing a ceramic rod and a metal rod, both ends of the connecting rod are metal rods, and both ends of the connecting rod are fixed to the connecting plate and the supporting seat respectively.

[0008] Further, a heat insulation assembly is arranged on the groove wall of the V-shaped limiting groove, the heat insulation assembly comprises an inner layer plate, an outer layer plate and a heat dissipation groove plate arranged between the inner layer plate and the outer layer plate, the inner layer plate is attached to the groove wall of the V-shaped limiting groove, the outer layer plate is arranged on the side, away from the groove wall of the V-shaped limiting groove, of the inner layer plate, a plurality of honeycomb-shaped groove perforations are formed in the heat dissipation groove plate, and the perforations penetrate through both sides of the heat dissipation groove plate.

[0009] Further, a low-thermal-conductivity zirconium oxide ceramic sheet is attached to the plate surface of the inner layer plate, and a high-thermal-conductivity aluminum nitride ceramic sheet is attached to the side, away from the inner layer plate, of the outer layer plate.

[0010] Further, the vertical section of the supporting groove is arranged in a U shape.

[0011] Further, a plurality of adsorption holes are formed in the groove wall of the supporting groove, an air flow channel penetrating through the adsorption holes is formed in the supporting seat, an air pipe is connected in the air flow channel in a penetrating mode, a small vacuum pump is arranged on the chassis, and the air inlet of the small vacuum pump is connected with the air pipe.

[0012] Further, the adsorption holes are located at the corners of the supporting groove.

[0013] Further, the plurality of adsorption holes are symmetrically arranged on both sides of the coil.

[0014] Further, the coil limiting piece further comprises a locking plate and a locking bolt for driving the locking plate to move, the locking plate is slidably connected to the chassis, the locking bolt is arranged along the length direction of the coil, the end of the locking bolt is in contact with the side wall of the locking plate, and the plate surface, away from the locking bolt, of the locking plate is in contact with the side wall of the coil.

[0015] Compared with the prior art, the beneficial technical effects of the present application are as follows:

[0016] 1. The setting of the thermal gradient isolation type limiting assembly as a whole can cooperatively position the steel wire and the coil pipe from the overall structure, so that the steel wire and the coil pipe welding point are at a more accurate preset position, improving the position stability of the steel wire and the coil pipe contact point and reducing the offset of the welding position. At the same time, an obvious temperature gradient can be formed around the welding point, slowing down the rapid conduction of high temperature at the welding point through the steel wire, the coil pipe and the chassis, thereby reducing the deformation and position offset of the steel wire, which is conducive to maintaining the stability of the entire steel wire and coil pipe structure, thereby improving the overall welding precision and improving the overall quality of the condenser.

[0017] 2. The V-shaped limiting groove can form a clamping effect on the steel wire compared with the traditional open-shaped placement groove, effectively limiting the shaking of the steel wire.

[0018] 3. The combination of the silicone rubber block and the ceramic base block into a buffer piece not only ensures the firmness of the buffer piece, but also effectively buffers the force when the steel wire moves due to external force, thereby reducing the deformation and position offset of the steel wire, which is conducive to maintaining the structure and position stability of the steel wire. At the same time, the internal and external arrangement of the silicone rubber block and the ceramic base block forms an alternating area of "thermal resistance-thermal conductivity", the silicone rubber block (high thermal resistance) directly contacts the coil pipe to provide preliminary thermal resistance and elastic buffering, and the ceramic base block (good thermal conductivity) is located behind the silicone rubber block, which helps to disperse and manage the heat partially blocked by the silicone rubber block, thereby blocking the heat around the coil pipe to a certain extent.

[0019] 4. The setting of the honeycomb opening forms a heat dispersion network, increases the heat dissipation area, and is conducive to the dispersion of heat, reducing the concentration of heat at the welding point and increasing the deformation and position migration of the steel wire.

[0020] 5. Through the setting of the low-thermal-conductivity zirconium oxide ceramic sheet, the high-thermal-conductivity aluminum nitride ceramic sheet and the heat dissipation groove plate, the steel wire heat can be quickly absorbed, dispersed and guided to the periphery, effectively controlling the heat flow path, thereby reducing the influence of high temperature on the steel wire and the coil pipe due to thermal expansion, which leads to the offset of the steel wire and the offset of the welding point.

[0021] 6. Through the setting of the vacuum pump and the adsorption hole, the limiting effect on the coil pipe can be improved, and the coil pipe can be set more stably. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The overall structure schematic diagram of the welding device in the background art is shown.

[0023] Figure 2 is Figure 1 the enlarged view of part A in the figure.

[0024] Figure 3 The overall structure schematic diagram of the refrigerator condenser welding device is shown.

[0025] Figure 4 For Figure 3 The middle B part is enlarged.

[0026] Figure 5 The schematic diagram for showing the positional relationship of the coil pipe limiting piece and the steel wire limiting piece is shown.

[0027] Figure 6 For Figure 5 The middle C part is enlarged.

[0028] Figure 7 The cross-sectional view schematic diagram for embodying the buffer piece is shown.

[0029] Figure 8 The cross-sectional view schematic diagram for embodying the heat insulation assembly is shown.

[0030] The figure mark: 1, welding mechanism; 2, chassis; 3, support seat; 4, buffer piece; 41, ceramic base block; 42, silicone rubber block; 5, support groove; 6, honeycomb opening; 7, adsorption hole; 9, small vacuum pump; 10, locking plate; 11, locking bolt; 12, connecting plate; 13, V-shaped limiting groove; 14, heat insulation assembly; 141, inner layer plate; 142, outer layer plate; 143, heat dissipation groove plate; 15, low thermal conductivity zirconia ceramic sheet; 16, high thermal conductivity aluminum nitride ceramic sheet; 17, perforation; 18, connecting rod; 19, placing rack; 20, placing groove. DETAILED DESCRIPTION

[0031] The present application will be further described in detail below in combination with embodiments and specific implementation manners. EMBODIMENT

[0032] Referring to Figure 3 , Figure 4 and Figure 5 , a refrigerator condenser welding device includes a welding mechanism 1 and a chassis 2. Among them, the welding mechanism 1 in the present embodiment is a welding machine in the prior art. The chassis 2 is provided with a thermal gradient isolation type limiting assembly, which includes a coil pipe limiting piece and a steel wire limiting piece. By the joint action of the coil pipe limiting piece and the steel wire limiting piece, the steel wire positioning precision is improved, and the condenser manufacturing quality is improved.

[0033] Referring to Figure 3 , Figure 4 and Figure 5 , the coil pipe limiting piece includes a support seat 3 and a buffer piece 4 arranged on the support seat 3. Among them, the support seat 3 is arranged in the shape of a cuboid, and the support seat 3 is fixedly connected to the chassis 2 and arranged along the length direction of the coil pipe diameter.

[0034] With reference to Figure 3 , Figure 4 and Figure 5 , the upper surface of the support seat 3 is provided with a support groove 5, which is a U-shaped groove in this embodiment, and the vertical section of the support groove 5 is arranged in a U-shaped manner. The support groove 5 is arranged along the length direction of the support seat 3, and the two ends of the support groove 5 are open and penetrate through the two ends of the support seat 3. When the coil pipe is placed on the support seat 3, the coil pipe can be in contact with the inner groove wall of the support groove 5.

[0035] In order to improve the fitting effect of the support groove 5 and the coil pipe, the corners of the support groove 5 are polished into smooth arc corners.

[0036] When the coil pipe is placed in the support groove 5, the plane where the groove opening of the support groove 5 is located is lower than the horizontal plane where the highest point of the vertical section of the pipe wall of the coil pipe is located. In this embodiment, the plane where the groove opening of the support groove 5 is located is below the central horizontal plane of the pipe wall of the coil pipe.

[0037] With reference to Figure 4 , Figure 5 and Figure 6 , a plurality of honeycomb openings 6 and a plurality of adsorption holes 7 are arranged on the groove wall of the support groove 5. The hole opening of the adsorption hole 7 is located on the blocking wall between adjacent honeycomb openings 6. The plurality of honeycomb openings 6 and adsorption holes 7 are arranged along the length direction of the support groove 5. Each adsorption hole 7 is located at the corner of the support groove 5. When the coil pipe is placed in the support groove 5, the plurality of adsorption holes 7 are symmetrically arranged on both sides of the pipe diameter of the coil pipe.

[0038] With reference to Figure 4 , Figure 5 and Figure 7 , the buffer 4 includes a ceramic base block 41 and a silicone rubber block 42. The shapes of the ceramic base block 41 and the silicone rubber block 42 are adapted to the shape of the honeycomb opening 6, and can be filled in the honeycomb opening 6.

[0039] With reference to Figure 4 , Figure 5 and Figure 7 , the silicone rubber block 42 is located on the outer side, and the ceramic base block 41 is located on the inner side. The side wall of the silicone rubber block 42 facing away from the ceramic base block 41 is an arc surface. When the buffer 4 is filled, the silicone rubber block 42 protrudes from the groove opening 0.5 mm of the support groove 5. The arc of the arc surface of the silicone rubber block 42 is consistent with the arc of the groove surface of the support groove 5.

[0040] In order to play the role of buffering while maintaining good heat insulation and absorption effect, the buffer 4 in this embodiment is filled in the honeycomb opening 6 in an interval.

[0041] With reference to Figure 4 , Figure 5 and Figure 7The air flow channel in the embodiment can be obtained by drilling, and the air flow channel is connected with the air pipe. The bottom frame 2 is provided with a small vacuum pump 9. The air outlet of the small vacuum pump 9 is connected with the air pipe.

[0042] When the coil is placed in the support groove 5, the small vacuum pump 9 is started. The air flow generated in the small vacuum pump 9 can generate a certain suction force on the coil, so that the coil can be more stably placed on the support seat 3.

[0043] Referring to Figure 4 , Figure 5 and Figure 7 , the coil limiting piece further comprises a locking plate 10 and a locking bolt 11 for driving the locking plate 10 to move. The locking plate 10 is an arc-shaped plate, and the concave surface of the locking plate 10 faces the coil.

[0044] The locking plate 10 in the embodiment is provided in plurality and is located at both ends of the bottom frame 2. Each locking plate 10 is provided with a locking bolt 11.

[0045] Referring to Figure 2 and Figure 4 , the locking plate 10 is slidingly connected to the bottom frame 2 along the length direction of the diameter of the coil, and the locking bolt 11 is arranged along the length direction of the coil. The end of the locking bolt 11 abuts against the convex surface of the locking plate 10. Under the pushing of the locking bolt 11, the concave surface of the locking plate 10 abuts against the arc-shaped side wall of the coil. The position of the locking plate 10 can be moved by screwing the locking bolt 11, so that the locking plate 10 can limit the position of the coil.

[0046] Referring to Figure 5 , Figure 6 and Figure 7 , the steel wire limiting piece comprises a connecting plate 12. The plane where the upper plate surface of the connecting plate 12 is located is higher than the plane where the slot opening of the support groove 5 is located. The connecting plate 12 is arranged horizontally along the direction perpendicular to the steel wire.

[0047] Referring to Figure 5 , Figure 6 and Figure 7 , a plurality of V-shaped limiting grooves 13 for placing the steel wire are formed in the plate surface of the connecting plate 12. The slot opening of the V-shaped limiting groove 13 penetrates the left and right plate surfaces of the connecting plate 12. The steel wire can be placed in the V-shaped limiting groove 13 along the direction perpendicular to the diameter of the coil. Compared with the traditional open-shaped placing groove, the V-shaped limiting groove 13 can clamp the steel wire, so that the steel wire can be better limited.

[0048] Referring to Figure 5 , Figure 7 and Figure 8The groove wall of the V-shaped limiting groove 13 is provided with a heat insulation assembly 14, and the heat insulation assembly 14 comprises an inner layer plate 141, an outer layer plate 142 and a heat dissipation groove plate 143 arranged between the inner layer plate 141 and the outer layer plate 142. The inner layer plate 141, the outer layer plate 142 and the heat dissipation groove plate 143 are arranged along the direction parallel to the corresponding groove wall of the V-shaped limiting groove 13.

[0049] The inner layer plate 141 is fixedly attached to the groove wall of the V-shaped limiting groove 13, and the outer layer plate 142 is arranged on the side of the inner layer plate 141 away from the groove wall of the V-shaped limiting groove 13. The surface of the inner layer plate 141 is attached with a low-thermal-conductivity zirconia ceramic sheet 15, and the side of the outer layer plate 142 away from the inner layer plate 141 is attached with a high-thermal-conductivity aluminum nitride ceramic sheet 16. When the steel wire is placed in the V-shaped limiting groove 13, the steel wire is in contact with the high-thermal-conductivity aluminum nitride ceramic sheet 16.

[0050] Referring to Figure 8 , the heat dissipation groove plate 143 is provided with a plurality of honeycomb-shaped perforations 17, and the perforations 17 penetrate through the two side surfaces of the heat dissipation groove plate 143.

[0051] By arranging the low-thermal-conductivity zirconia ceramic sheet 15, the high-thermal-conductivity aluminum nitride ceramic sheet 16 and the heat dissipation groove plate 143, the heat of the steel wire can be quickly absorbed and dispersed to the periphery, the heat flow path is effectively controlled, and the influence of the thermal expansion of the steel wire and the coil on the deviation of the steel wire and the welding point is reduced.

[0052] Referring to Figure 3 , Figure 4 and Figure 5 , the connecting rod 18 is arranged between the connecting plate 12 and the support seat 3, and the connecting rod 18 is in a cylindrical shape. The connecting rod 18 is formed by alternately connecting ceramic rods and metal rods, and the two ends of the connecting rod 18 are metal rods. The metal rods in the embodiment are copper-iron alloy rods, and the two ends of the connecting rod 18 are respectively connected to the connecting plate 12 and the support seat 3. The low thermal expansion coefficient of the ceramic rod can effectively block the heat conduction path.

[0053] The whole device mainly controls the heat flow path through multi-level material selection and structure design. Firstly, in the coil limiting part, the honeycomb hole 6 on the support groove 5 wall is filled with the buffer 4 composed of ceramic base block 41 and silicone rubber block 42, which have good heat insulation characteristics and are filled in a spaced manner to block the continuous path of heat conduction. Secondly, in the steel wire limiting part, the groove wall of the V-shaped limiting groove 13 is provided with a three-layer heat insulation assembly 14 composed of an inner layer plate 141, an outer layer plate 142 and a heat dissipation groove plate 143. The inner layer plate 141 is attached to the low thermal conductivity zirconia ceramic sheet 15 to prevent heat conduction to the base, the outer layer plate 142 is attached to the high thermal conductivity aluminum nitride ceramic sheet 16 to quickly absorb the heat of the steel wire, and the middle heat dissipation groove plate 143 is provided with a honeycomb-shaped perforation 17 to increase the heat dissipation area and disperse the heat. The connecting rod 18 between the connecting plate 12 and the support seat 3 is designed to be alternately fixed with ceramic rods and metal rods, and the low thermal expansion coefficient of the ceramic rod effectively blocks the heat conduction path. This thermal gradient control system can quickly absorb the heat generated by the welding point during welding and disperse it along the predetermined path, avoiding uniform heat diffusion to the whole structure, thereby slowing down the rapid conduction of welding high temperature through the steel wire, coil and base 2, and solving the problems of steel wire deformation and position deviation, maintaining the stability of the welding structure and improving the welding precision and the overall quality of the condenser.

[0054] Principle of implementation: Before welding, first place the coil on the base 2, so that the coil is placed in the support groove 5, then twist the locking bolt 11 to make the locking plate 10 abut against the arc-shaped pipe wall at both ends of the coil, then open the small vacuum pump 9 to adsorb the coil by air flow; then place the steel wire in the V-shaped limiting groove 13. During welding, the whole base 2 is manually pushed to the lower side of the welding head in the welding mechanism 1, the welding head is lowered and welded to the steel wire and the coil, and high temperature is generated at the welding point. At this time, the integral setting of the coil limiting part and the steel wire limiting part can have the effect of overall stability, and can form an obvious temperature gradient around the welding point, slow down the rapid conduction of the high temperature at the welding point through the steel wire, coil and base 2, and solve the problems of steel wire deformation and position deviation, which is conducive to maintaining the stability of the whole steel wire and coil structure, thereby improving the overall welding precision and improving the overall quality of the condenser.

[0055] The above is only the preferred embodiment of the present application, and it should be pointed out that those skilled in the art can make several modifications and improvements without departing from the creative concept of the present application, which are all within the protection scope of the present application.

Claims

1. A refrigeration unit condenser welding device, comprising a base frame (2), characterized in that, The base frame (2) is equipped with a thermal gradient isolation limiting assembly, which includes a coil limiting component and a steel wire limiting component. The coil limiting component includes a support base (3) and a buffer component (4) disposed on the support base (3). The support base (3) has a support groove (5) for placing the coil. The plane where the groove opening of the support groove (5) is located is lower than the horizontal plane where the highest point of the vertical cross-section of the coil wall is located. The groove wall of the support groove (5) has a plurality of honeycomb openings (6). The buffer component (4) includes a ceramic base block (41) and a silicone rubber block (42). The buffer component (4) is placed at intervals in the honeycomb openings (6). The silicone rubber block (42) abuts against the side wall of the coil. The wire limiting component includes a connecting plate (12), the plane of the upper surface of the connecting plate (12) is higher than the plane of the groove opening of the support groove (5), the connecting plate (12) is provided with a V-shaped limiting groove (13) for placing the wire, and a heat insulation component (14) is provided on the groove wall of the V-shaped limiting groove (13). The heat insulation component (14) includes an inner layer plate (141), an outer layer plate (142), and a heat dissipation groove plate (143) disposed between the inner layer plate (141) and the outer layer plate (142). The outer layer plate (142) is attached to the wall of the V-shaped limiting groove (13) and is located on the side of the inner layer plate (141) away from the wall of the V-shaped limiting groove (13). The heat dissipation groove plate (143) has several honeycomb-shaped perforations (17) and the perforations (17) penetrate the two sides of the heat dissipation groove plate (143). The inner layer plate (141) is attached with a low thermal conductivity zirconia ceramic sheet (15) and the outer layer plate (142) is attached with a high thermal conductivity aluminum nitride ceramic sheet (16) on the side away from the inner layer plate (141). A connecting rod (18) is provided between the connecting plate (12) and the support base (3). The connecting rod (18) is formed by alternating ceramic rods and metal rods. Both ends of the connecting rod (18) are metal rods. The two ends of the connecting rod (18) are respectively fixed to the connecting plate (12) and the support base (3).

2. The refrigeration condenser welding device as described in claim 1, characterized in that: The vertical cross-section of the support groove (5) is U-shaped.

3. The refrigeration condenser welding device as described in claim 1, characterized in that: The support groove (5) has several adsorption holes (7) on its wall. The support base (3) has an air channel that communicates with the adsorption holes (7). A ventilation pipe is connected through the air channel. A small vacuum pump (9) is installed on the base frame (2). The air extraction port of the small vacuum pump (9) is connected to the ventilation pipe.

4. The freezer condenser welding device as described in claim 3, characterized in that: The adsorption hole (7) is located at the corner of the support groove (5).

5. The refrigeration condenser welding device as described in claim 4, characterized in that: Several of the adsorption holes (7) are symmetrically arranged on both sides of the coil.

6. The refrigeration condenser welding device as described in claim 1, characterized in that: The coil limiting component also includes a locking plate (10) and a locking bolt (11) for driving the locking plate (10) to move. The locking plate (10) is slidably connected to the base frame (2). The locking bolt (11) is arranged along the length direction of the coil. The end of the locking bolt (11) abuts against the side wall of the locking plate (10). The plate surface of the locking plate (10) away from the locking bolt (11) abuts against the side wall of the coil.

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