An intermediate evaporation tube fixing structure for a fin evaporator and a fin evaporator

Abstract

The present invention discloses a fixing structure for an intermediate evaporation tube of a finned evaporator. The finned evaporator includes an evaporation coil formed by connecting a plurality of evaporation tubes. The fixing structure is used to fix the intermediate part between any two adjacent evaporation tubes. The fixing structure includes: an intermediate bracket, on which a clamping installation hole is provided; a fixing component, which is arranged in the clamping installation hole. When the evaporation tubes at the lower middle position are offset and misaligned, they will respectively push the main support block and the support clamping plate to move outwards. The support clamping plate will be subjected to the reverse spring force of the support spring sleeve rod to provide support for the evaporation tube. The rotation of the connecting plate will cause the top sliding blocks on the main support blocks at both ends to slide in the sliding grooves and produce extrusion deformation with the correction arc elastic pieces in the corresponding directions, controlling the positions of the evaporation tubes in the lower middle layer, reducing the deformation and tearing of the lower fins, and strengthening the structural stability between the evaporation tubes in the lower middle layer.

Description

Technical Field

[0001] The present invention belongs to the technical field of evaporators, and particularly relates to a fixing structure for an intermediate evaporation tube of a finned evaporator and a finned evaporator. Background Art

[0002] Evaporators mostly use fin plates welded on both sides of an aluminum tube. The aluminum tube is also called an evaporation tube or an evaporation tube coil. The evaporator is a very important component among the four major refrigeration components. The low-temperature condensed liquid passes through the evaporator and exchanges heat with the outside air, vaporizing and absorbing heat. When the high-temperature and high-humidity air passes through the evaporator, the water vapor in the high-temperature and high-humidity air will condense on the surface of the evaporator to form a frost layer or an ice layer. Therefore, the distribution characteristics of the frost layer or ice layer on the evaporator are also from bottom to top, and the thickness of the frost layer or ice layer gradually decreases from bottom to top. Therefore, a heater needs to be installed below the finned evaporator for defrosting. In order to facilitate defrosting of the lower part of the finned evaporator and the use of the heater, the installation density of the fins near the heater part of the evaporator is less than the upper installation density and is relatively sparse;

[0003] For example, the Chinese patent with the publication number CN105928261A discloses a novel finned evaporator for a refrigerating chamber, including an evaporator bracket, an evaporation tube coil, a connecting pipe, a single-piece fin and a fixing plate. The evaporator bracket, the single-piece fin and the fixing plate are made of 8015 in the 8 series of aluminum alloy. There are pin cards on the side of the evaporator bracket with a height and a width of 3mm ± 0.05mm. The fixing plate is installed at the connection part between the evaporator bracket and the evaporation tube coil. The evaporation tube coil is made of aluminum. The outer diameter of the evaporation tube coil is 8mm ± 0.05mm, and the wall thickness of the evaporation tube coil is 1mm ± 0.05mm. There are two connecting pipes in total, and the diameters and wall thicknesses of the two connecting pipes are the same; the fixing plate is installed at the connection part between the evaporator bracket and the evaporation tube coil. Through the optimized manufacturing and combination of the evaporator bracket, the evaporation tube coil, the connecting pipe, the single-piece fin and the fixing plate, there are no leaky micropores or deformable cracks in the pipeline.

[0004] However, the above solutions have the following deficiencies: In the above patent document, the structural strength is improved by installing a fixing plate at the connection between the evaporator bracket and the evaporation coil. However, the fins on the finned evaporator are relatively sparse near the heater. The installation of the sparse fins results in a relatively low structural strength of the corresponding evaporation tube installation structure. During the use of the evaporator, the evaporation tubes on it will undergo cold shrinkage. When the heater is started for the defrosting process, the evaporation tubes near the heater will undergo thermal expansion. However, there is no fixing structure between the evaporation tubes near the heater at the lower layer of the finned evaporator. When the fins expand, and when the evaporation tubes undergo cold shrinkage or are offset, misaligned, or shaken under external forces, the lower-layer evaporation tubes with relatively low structural strength will move closer and deform, which will cause the fins sleeved between the two evaporation tubes to deform and crack under strong pulling. How to strengthen the structural stability between the evaporation tubes at the lower layer of the finned evaporator and provide support and correction when the evaporation tubes are deformed is the problem that needs to be solved currently.

[0005] Therefore, we propose an intermediate evaporation tube fixing structure for a finned evaporator and a finned evaporator to solve the problems mentioned in the above background technology. Summary of the Invention

[0006] The purpose of the present invention is to provide an intermediate evaporation tube fixing structure for a finned evaporator and a finned evaporator to solve the problems existing in the above background technology.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] An intermediate evaporation tube fixing structure for a finned evaporator, the finned evaporator includes an evaporation coil formed by connecting several evaporation tubes, and the fixing structure is used to fix the middle part between any two adjacent evaporation tubes. The fixing structure includes:

[0009] An intermediate bracket, the intermediate bracket is sleeved on the adjacent evaporation tubes, and clamping installation holes are opened on the intermediate bracket;

[0010] A fixing component, the fixing component is arranged in the clamping installation hole and is used to fix the relative position between the two evaporation tubes located in the same clamping installation hole.

[0011] Preferably, the bent parts on both sides of the evaporation tube are sleeved with an evaporator bracket for fixation. Fins are distributed and sleeved on the evaporation tube. The distribution density of the fins on the evaporation tubes at the lower part of the finned evaporator is less than that at the upper part. The clamping installation holes are provided in groups, and two adjacent evaporation tubes are inserted into each group of clamping installation holes. The bottom end face of the intermediate bracket is symmetrically provided with card slot openings for the fixed connection of the heater.

[0012] Preferably, the dislocation support assembly includes support arc blocks symmetrically arranged on the front and rear end faces of the clamping installation hole. The support arc blocks on each side of the clamping installation hole are arranged oppositely, and sliding grooves are obliquely arranged on the inner side walls of the oppositely arranged support arc blocks. Correction arc elastic sheets are symmetrically arranged on the inner side walls of the sliding grooves. A top slider located between the correction arc elastic sheets is slidably fitted inside the sliding grooves, and a main support block is arranged on the outer end face of the top slider. The main support block is in limit fit with the outer surface of the evaporation tube passing through the clamping installation hole. When the middle evaporation tube in the lower layer of the evaporation tube is offset and displaced, the middle evaporation tube in the lower layer pushes the top slider on the main support block to squeeze the correction arc elastic sheet corresponding to the movement direction, causing elastic deformation.

[0013] Preferably, arc-shaped parts and anti-detachment excellent arc notches are respectively arranged on the opposite sides of the outer wall of the main support block, and the arc-shaped parts are in fit with the outer surface of the middle evaporation tube in the lower layer inside the evaporation tube.

[0014] Preferably, the dislocation support assembly further includes anti-detachment pin blocks rotatably penetrating through the anti-detachment excellent arc notches corresponding to the main support blocks on the front and rear end face support arc blocks. A connecting plate is arranged between the anti-detachment pin blocks at the upper and lower ends inside the clamping installation hole. Connecting holes are obliquely arranged on the front and rear surfaces of the connecting plate. A support spring sleeve rod slidably penetrates through the preset holes on the connecting holes. A support clamping plate is arranged at the outer end of the support spring sleeve rod, and the support clamping plate is in contact with and provides support for the outer surface of the middle evaporation tube in the lower layer inside the evaporation tube. When the middle evaporation tube in the lower layer of the evaporation tube is offset and displaced, the support clamping plate provides reverse correction support for the offset and displaced middle evaporation tube in the lower layer through the support spring sleeve rod. At the same time, the connecting plate drives the top sliders on the main support blocks at both ends to squeeze the correction arc elastic sheets in the corresponding directions through the rotation of the anti-detachment pin blocks and provides reverse correction support.

[0015] A fin evaporator includes the intermediate evaporation tube fixing structure for the fin evaporator described above.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: When the evaporation tubes in the lower middle layer are offset and displaced, they will respectively push the main support block and the support clamping plate to move outwards. The support clamping plate will be subjected to the reverse spring force of the support spring sleeve rod to provide preliminary support for the evaporation tube, and the support spring sleeve rod will also exert an outward thrust on the connecting plate, thereby causing the anti-detachment pin blocks at both ends of the connecting plate to rotate in the anti-detachment excellent arc notches. The rotation of the connecting plate will cause the top sliders on the main support blocks at both ends to slide in the sliding grooves and generate extrusion deformation with the correction arc elastic sheets in the corresponding directions. The correction arc elastic sheets indirectly generate a correction support force on the evaporation tube, improving the structural strength between the evaporation tubes, controlling the positions of the evaporation tubes in the lower middle layer relative to each other, reducing the deformation and tearing of the lower fins, and strengthening the structural stability between the evaporation tubes in the lower middle layer. Description of the Drawings

[0017] Figure 1Schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is Figure 1 Schematic diagram of the intermediate bracket structure;

[0019] Figure 3 is Figure 2 Schematic diagram of the matching structure of the front and rear end face support arc blocks and the connecting plate of the clamping installation hole;

[0020] Figure 4 is Figure 3 Schematic diagram of the separated state of the main support block, the top sliding block and the single-sided correction arc elastic piece;

[0021] Figure 5 is Figure 2 Front view structure schematic diagram;

[0022] Figure 6 is Figure 5 Partial enlarged schematic diagram;

[0023] Figure 7 is Figure 5 Left view schematic diagram.

[0024] In the figure: 1. Evaporation tube; 2. Evaporator bracket; 3. Intermediate bracket; 4. Clamping installation hole; 5. Card slot opening; 6. Support arc block; 7. Slide groove; 8. Correction arc elastic piece; 9. Top sliding block; 10. Main support block; 11. Arc part; 12. Anti-disengagement excellent arc groove opening; 13. Anti-disengagement pin block; 14. Connecting plate; 15. Connecting hole block; 16. Support spring sleeve rod; 17. Support clamping plate; 101. Finned piece. Specific implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] Please refer to Figures 1-7 , the present invention provides a technical solution:

[0027] Embodiment 1:

[0028] An intermediate evaporation tube fixing structure for a finned evaporator. The finned evaporator includes an evaporation coil formed by connecting a plurality of evaporation tubes 1. The fixing structure is used to fix the middle part between any two adjacent evaporation tubes 1. The fixing structure includes:

[0029] An intermediate bracket 3, which is sleeved on the adjacent evaporation tubes 1, and a clamping installation hole 4 is opened on the intermediate bracket 3;

[0030] A fixing component, which is arranged in the clamping installation hole 4 and is used to fix the relative positions between the two evaporation tubes 1 located in the same clamping installation hole 4.

[0031] Example 2:

[0032] Based on Example 1, further explanation is as follows. As Figure 1 or Figure 2 shown, evaporator brackets 2 are sleeved at the bent pipe parts on both sides of the evaporation pipe 1 for fixation. Fins 101 are distributed and sleeved on the evaporation pipe 1. The distribution density of the fins 101 at the lower part of the evaporation pipe 1 near the heater is less than that at the upper part. The middle bracket 3 is arranged at the middle position of the evaporation pipe 1 corresponding to the fins 101 at the sparse part. The thickness of the middle bracket 3 is 0.85 - 3 mm. In this example, the thickness of the middle bracket 3 is 0.85 mm. The thickness of the middle bracket 3 can be adaptively adjusted according to the thickness of the fins 101, as long as it is ensured that the thickness of the middle bracket 3 is at least four times the thickness of the fins 101. Clamping installation holes 4 are arranged on the side wall of the middle bracket 3. The clamping installation holes 4 are of an inclined rectangular hole structure, and the distance between the upper and lower end faces of the rectangular hole is of an arc structure. Two evaporation pipes 1 are grouped together and penetrate through the upper and lower ends of the port part of the clamping installation holes 4. The middle bracket 3 is vertically perpendicular to the evaporation pipe 1, and the middle bracket 3 is fixedly installed at the middle position of the lower layer of the evaporation pipe 1. The clamping installation holes 4 on the middle bracket 3 are arranged in two layers up and down, and each layer is provided with the same number of clamping installation holes 4 as the evaporation pipe 1. Symmetrically arranged card slot openings 5 are provided on the bottom end face of the middle bracket 3 and are used for the fixed connection of the heater (not shown) in a matching manner. As Figure 2 shown, the card slot openings 5 are clamped with the installation part of the heater shell, providing auxiliary support for the later installation of the heater;

[0033] The dislocation support assembly includes support arc blocks 6 symmetrically arranged on the front and rear end faces of the clamping installation holes 4. The support arc blocks 6 are of a U-shaped structure, and the support arc blocks 6 protrude 2 mm from the outer surface of the middle bracket 3. The support arc blocks 6 on each side of the clamping installation holes 4 are arranged oppositely, and inclined chutes 7 are arranged obliquely on the inner side walls of the oppositely arranged support arc blocks 6. The cross section of the chutes 7 is of a T-shaped structure. Rectifying arc elastic sheets 8 are symmetrically arranged on the inner side walls of the chutes 7. The rectifying arc elastic sheets 8 are of an arched structure. A top slide block 9 located between the rectifying arc elastic sheets 8 is slidably matched on the inner side of the chutes 7. As shown in the figure, the top slide block 9 is of a T-shaped structure, and the two end faces of the T side of the insertion end of the top slide block 9 are of a cylindrical surface, facilitating the extrusion during the relative movement of the top slide block 9 and the rectifying arc elastic sheets 8. A main support block 10 is welded or screwed to the outer end face of the top slide block 9. The main support block 10 is arranged in a limited and fitting manner with the outer surface of the evaporation pipe 1 penetrating through the clamping installation holes 4. When the evaporation pipe 1 in the lower layer is displaced and misaligned, the evaporation pipe 1 pushes the top slide block 9 on the main support block 10 to squeeze the rectifying arc elastic sheet 8 corresponding to the movement direction, generating elastic deformation, so as to preliminarily support and fix the evaporation pipe 1 at the middle position of the offset lower layer;

[0034] On the opposite sides of the outer wall of the main support block 10, there are respectively an arc portion 11 and an anti - detachment excellent arc notch 12. The arc portion 11 is arranged in contact with the outer surface of the evaporation pipe 1, and a rubber layer with a thickness of 0.5 mm is bonded to the inner arc surface of the arc portion 11 to improve the fitting support surface between the arc portion 11 and the outer surface of the evaporation pipe 1.

[0035] The dislocation support assembly further includes an anti - detachment pin block 13 that rotatably penetrates through the main support block 10 corresponding to the anti - detachment excellent arc notch 12 on the front and rear end face support arc block 6. The anti - detachment pin block 13 can be limited to rotate within the anti - detachment excellent arc notch 12. A connecting plate 14 is arranged between the anti - detachment pin blocks 13 at the upper and lower ends inside the clamping installation hole 4. The front and rear surfaces of the connecting plate 14 are obliquely provided with connecting hole blocks 15. The connecting hole blocks 15 and the top sliding block 9 are arranged in parallel. A support spring sleeve rod 16 slidably penetrates through the preset holes on the connecting hole blocks 15. The outer end of the support spring sleeve rod 16 is provided with a support clamping plate 17. The support clamping plate 17 is of an arc structure. At the same time, a rubber layer is also bonded to the inner arc surface of the support clamping plate 17 to provide soft support. The support spring sleeve rod 16 generates a spring thrust on the support clamping plate 17 towards the outer surface of the evaporation pipe 1 in the middle of the lower layer, and is in close contact and fit. When the lower - layer evaporation pipe 1 is offset and misaligned, the support clamping plate 17 provides reverse correction support for the offset and misaligned lower - layer middle evaporation pipe 1 through the support spring sleeve rod 16. At the same time, the connecting plate 14 drives the top sliding blocks 9 on the two ends of the main support block 10 to squeeze the correction arc elastic pieces 8 in the corresponding directions and provide reverse correction support.

[0036] Embodiment Three:

[0037] On the basis of Embodiment Two, further explanation is made. Since this embodiment is improved based on Embodiment Two, the same parts will not be elaborated. The thickness of the middle bracket 3 is 3 mm, and the support arc block 6 protrudes 3 mm from the outer surface of the middle bracket 3.

[0038] The working principle is as follows: Before installing the evaporation pipe 1 on the evaporator bracket 2, first fixedly install the middle bracket 3 at the lower layer part of the evaporation pipe 1, so that the arc portion 11 on the main support block 10 and the support clamping plate 17 support and fix the evaporation pipe 1. Then, the fins 101 are fixed on the evaporation pipe 1 in a gradually sparser distribution from top to bottom. Finally, the bent pipe portion of the evaporation pipe 1 protruding outside the evaporator bracket 2 is welded and fixed.

[0039] When the evaporation tubes 1 in the lower layer are offset and misaligned, they will respectively push the main support blocks 10 and the support clamping plates 17 to move outward. The support clamping plates 17 will be provided with a reverse spring force by the support spring sleeve rods 16 to provide preliminary support for the evaporation tubes 1. The support spring sleeve rods 16 will also generate an outward thrust on the connecting plate 14, so that the anti-disengagement pin blocks 13 at both ends of the connecting plate 14 rotate in the anti-disengagement arc notches 12. The rotation of the connecting plate 14 will cause the top sliding blocks 9 on the main support blocks 10 at both ends to slide in the sliding grooves 7 and generate extrusion deformation with the correcting arc spring pieces 8 in the corresponding directions. The correcting arc spring pieces 8 indirectly generate a correcting support force on the evaporation tubes 1, improve the structural strength between the evaporation tubes 1, control the positions of the evaporation tubes 1 in the middle of the lower layer relative to each other, reduce the deformation and tearing of the lower fins 101, and strengthen the structural stability between the evaporation tubes 1 in the middle of the lower layer.

[0040] This embodiment also provides a fin evaporator, including the intermediate evaporation tube fixing structure for the fin evaporator provided in Embodiment 1.

[0041] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intermediate evaporation tube fixing structure for a finned evaporator, the finned evaporator comprising an evaporation coil formed by connecting a plurality of evaporation tubes (1), characterized in that, The fixing structure is used to fix the middle part between any two adjacent evaporation tubes (1). The fixing structure includes: An intermediate bracket (3), the intermediate bracket (3) is sleeved on the adjacent evaporation tubes (1), and clamping installation holes (4) are provided on the intermediate bracket (3); A fixing component, the fixing component is arranged in the clamping installation hole (4) and is used to fix the relative positions between two evaporation tubes (1) located in the same clamping installation hole (4); The fixing component includes support arc blocks (6) symmetrically arranged on the front and rear end faces of the clamping installation hole (4). The support arc blocks (6) on each side surface of the clamping installation hole (4) are arranged oppositely, and sliding grooves (7) are obliquely arranged on the inner side walls of the oppositely arranged support arc blocks (6). Correction arc elastic pieces (8) are symmetrically arranged on the inner side walls of the sliding grooves (7). A top sliding block (9) located between the correction arc elastic pieces (8) is slidably matched with the inner side of the sliding groove (7), and a main support block (10) is arranged on the outer end surface of the top sliding block (9). The main support block (10) is in limit fit with the outer surface of the evaporation tube (1) penetrating through the clamping installation hole (4). When the two evaporation tubes (1) located in the same clamping installation hole (4) have relative displacement, the main support block (10) drives the correction arc elastic piece (8) to generate elastic deformation; Arc-shaped parts (11) and anti-detachment excellent arc notches (12) are respectively arranged on the opposite sides of the outer wall of the main support block (10), and the arc-shaped parts (11) are in fit with the outer surface of the evaporation tube (1); The fixing component further includes anti-detachment pin blocks (13) rotatably penetrating through the anti-detachment excellent arc notches (12) corresponding to the main support blocks (10) on the front and rear end face support arc blocks (6). A connecting plate (14) is arranged between the anti-detachment pin blocks (13) at the upper and lower ends inside the clamping installation hole (4). Connecting hole blocks (15) are obliquely arranged on the front and rear surfaces of the connecting plate (14). A support spring sleeve rod (16) slidably penetrates through a preset hole on the connecting hole block (15). A support clamping plate (17) is arranged at the outer end of the support spring sleeve rod (16), and the support clamping plate (17) is in contact with and provides support for the outer surface of the evaporation tube (1). When the two evaporation tubes (1) located in the same clamping installation hole (4) have relative displacement, the support clamping plate (17) provides reverse correction support for the offset and misaligned evaporation tube (1) through the support spring sleeve rod (16). At the same time, the connecting plate (14) drives the top sliding blocks (9) at both ends to squeeze the correction arc elastic pieces (8) in the corresponding directions and provide reverse correction support through the rotation of the anti-detachment pin blocks (13).

2. The fixed structure of the intermediate evaporation tube for a finned evaporator according to claim 1, characterized in that: Evaporator brackets (2) are sleeved on the bent parts at both sides of the evaporation tube (1) for fixation. Fins (101) are distributed and sleeved on the evaporation tube (1). The distribution density of the fins (101) on the evaporation tube (1) below the fin evaporator is less than the upper distribution density. Four groups of clamping installation holes (4) are provided, and two adjacent evaporation tubes (1) are inserted into each group of clamping installation holes (4). Clamping slots (5) are symmetrically arranged on the bottom end face of the intermediate bracket (3) for fixed connection of the heater.

3. A finned evaporator, characterized in that: Including the intermediate evaporation tube fixing structure for the fin evaporator according to claim 1 or 2 above.

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