Preparation method of evaporator for reducing water condensation amount and evaporator

Abstract

The present invention discloses a preparation method of an evaporator for reducing the amount of water condensation and an evaporator, wherein the preparation method comprises the following steps: step A: according to the size of the evaporator, a corresponding number of fins with protrusions are selected, and a first through hole is provided in the protrusion; step B: lamination, a plurality of fins are stacked together in sequence, and a detachable pad is provided between two adjacent fins; a second through hole is provided at a position corresponding to the first through hole on the pad; step C: pipe penetration, selecting copper tubes with the same number as the first through holes on a single fin, and passing the copper tubes through all the fins; step D: sealing one end of the copper tube, and conveying a liquid medium with a pressure of 8MPa into the copper tube through a medium conveying device; and maintaining the pressure for a period of time, so that the copper tube expands and has an interference fit with the first through hole. The present invention can use existing fins and equipment to produce an evaporator whose spacing between two adjacent fins meets the requirements of freezing work, ensuring that the air conditioner continues to work normally when the refrigeration temperature is lower than 0°C.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration equipment, in particular to a preparation method of an evaporator for reducing water condensation and the evaporator. Background Art

[0002] The principle of air conditioning is that the compressor compresses the gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant and sends it to the outdoor unit condenser as liquid refrigerant. The liquid refrigerant enters the evaporator through the capillary tube, absorbs heat from the indoor air and vaporizes to become gaseous refrigerant. The gaseous refrigerant then returns to the compressor to continue compression, and the cycle continues for refrigeration.

[0003] An existing air conditioner can realize the function of freezing after being improved, that is, it can reach the lowest refrigeration temperature below zero degrees Celsius. The air blown out by the fan in the air conditioner exchanges heat with the refrigerant in the evaporator to cool down, and then blows into the room to play a cooling role; during the refrigeration process, the air conditioner's indoor unit will condense here because the temperature is lower than 0℃, and eventually block the evaporator tube, causing the air conditioner to be unable to continue to work normally. In order to reduce the amount of condensed water vapor, the spacing between the fins of the evaporator needs to be increased, but the spacing between adjacent fins of the fin-type evaporator produced on the market is 3mm, and it cannot be adjusted, which does not meet the spacing required for freezing work. If a new fin is produced by opening a mold, it will cost more production costs. Summary of the invention

[0004] The present invention aims to solve at least one of the above-mentioned technical problems in the related art to a certain extent. To this end, the present invention provides a method for preparing an evaporator and an evaporator that reduces the amount of water condensation, which can use existing fins and existing equipment to produce an evaporator whose spacing between two adjacent fins meets the requirements of refrigeration work, reduce the amount of water condensed on the evaporator during the refrigeration process, and ensure that the air conditioner continues to work normally when the refrigeration temperature is lower than 0°C.

[0005] According to the first aspect of the present invention, a method for preparing an evaporator for reducing the amount of water condensation comprises the following steps: step A: selecting fins, selecting a corresponding number of fins according to the size of the evaporator, each of the fins being stamped with a protrusion, and a first through hole penetrating the protrusion; step B: laminating, aligning a plurality of the fins and stacking them together in sequence, and providing a detachable pad between two adjacent fins, one end of the pad abutting against the protrusion, and the other end of the pad abutting against the end of the fin away from the protrusion; the pad corresponding to the protrusion on the pad. The position of the first through hole is penetrated by a second through hole; Step C: Pipe penetration, selecting copper tubes with the same number as the first through holes on a single fin, and passing the copper tubes through the first through hole and the second through hole to penetrate the fin; Step D: Pipe expansion, sealing one end of each of the copper tubes, and conveying a liquid medium with a pressure of 6 to 10 MPa from the other end of the copper tube into the copper tube through a medium conveying device; after the pressure in the copper tube reaches the set range, maintaining the pressure for 20 to 100 seconds, so that the outer diameter of the copper tube expands and interferes with the first through hole.

[0006] A preparation method for an evaporator for reducing the amount of water condensation according to an embodiment of the present invention has at least the following technical effects: by selecting a plurality of fins commonly seen on the market, the fins are stamped with flanges with protrusions, and in the process of stacking the plurality of fins, a detachable pad is provided on two adjacent fins, and then a plurality of copper tubes are passed through the plurality of fins in turn in the left-right direction, and then a liquid medium with a pressure of 6 to 10 MPa is transported into all the copper tubes through a medium conveying device; after the pressure in the copper tube reaches a set range, the pressure is maintained for a period of time, so that the outer diameter of the copper tube becomes larger and interferes with the first through hole, so that the copper tube connects the plurality of fins to form an evaporator; through the separation effect of the pad and the protrusion, the distance between two adjacent fins on the evaporator becomes larger, so that the surface heat transfer coefficient of the evaporator becomes larger, thereby accelerating the heat transfer between air and the evaporator. The speed of refrigerant convective heat transfer in the evaporator is increased, the contact time between water vapor in the air and the evaporator is reduced, and the amount of water condensed on the evaporator is reduced, so that the evaporator can continue to work normally when the refrigeration temperature is below 0°C to meet the freezing work requirements; at the same time, the protrusion can increase the contact area between a single fin and the copper tube, so that the copper tube can be stably connected to the single fin after the tube is expanded; by setting the pad to be detachable, the existing fins and existing equipment can produce an evaporator with a spacing between two adjacent fins that meets the freezing work requirements with the assistance of the pad, and then the pad can be removed from the evaporator and used as an auxiliary mold to prepare the next evaporator; with the assistance of the pad, an evaporator that meets the freezing work requirements can be generated on the existing fins and existing equipment, without the need for additional mold opening and purchase of new production equipment, which greatly reduces production costs.

[0007] According to some embodiments of the present invention, in step B, the pad includes a first plate and a second plate which are separately arranged, the first plate is provided with a first semicircular groove, and the second plate is provided with a second semicircular groove at a position corresponding to the first semicircular groove, and when installed, the first semicircular groove and the second semicircular groove form the second through hole.

[0008] According to some embodiments of the present invention, in step B, a buckle column is protruding from the upper side wall of the first plate, and a buckle position matching the buckle column is provided on the lower side wall of the second plate.

[0009] According to some embodiments of the present invention, in step B, an inclined elastic member is provided on the upper end side wall of the buckle column, one end of the elastic member is connected to the outer side wall of the buckle column, and the suspended end of the elastic member is arranged away from the outer side wall of the buckle column; the buckle position is arranged as a T-shaped groove, one end of the T-shaped groove away from the buckle column is a large diameter groove, and the other end of the T-shaped groove is a small diameter groove, and during installation, the end of the suspended end abuts against the groove wall of the large diameter groove.

[0010] According to some embodiments of the present invention, in step B, the lower end opening of the small-diameter groove is configured as an arc-shaped opening so that the buckle column can be embedded in the buckle position from any angle for clamping.

[0011] According to some embodiments of the present invention, in the step B, threaded holes are respectively passed through the first plate and the second plate in the up-down direction, and the threaded holes are threadedly connected to the fastening screws.

[0012] According to some embodiments of the present invention, in step B, the plurality of protrusions are five horizontal and four vertical protrusions arranged on one end face of each of the fins, and two pads are arranged between two adjacent fins, one of the pads abuts against the protrusions located in the same horizontal row at the top end of each of the fins, and the other pad abuts against the protrusions located in the same horizontal row at the bottom end of each of the fins; four second through holes are arranged on each of the pads in the front-to-back direction.

[0013] According to some embodiments of the present invention, in step D, water at a pressure of 8 MPa is delivered to the copper tube by a medium delivery device; after the pressure in the copper tube reaches a set range, the pressure is maintained for 60 seconds so that the outer diameter of the copper tube expands and interferes with the first through hole.

[0014] An evaporator according to an embodiment of the second aspect of the present invention is made by any of the above-mentioned preparation methods, and includes a plurality of fins, each of which is stamped with a plurality of protrusions, and a first through hole is penetrated at a position corresponding to the protrusion on each fin, a copper tube is passed through the first through hole, and the copper tube is interference fit with the first through hole, and the copper tube connects the plurality of fins into one; the spacing between the protrusion of one fin and the adjacent fin is 3 mm to 5 mm.

[0015] An evaporator according to an embodiment of the present invention has at least the following technical effects: by interference fitting the copper tube with the first through hole, the copper tube connects multiple fins to form an evaporator, and by stamping a protrusion on each fin, the first through hole passes through the protrusion, the protrusion increases the contact area between the single fin and the copper tube, so that the copper tube can be stably connected to the single fin, thereby improving the structural stability of the evaporator; at the same time, by setting the spacing between the protrusion of a fin and the adjacent fin to 3mm~5mm, relative to the evaporator on the market, the spacing between two adjacent fins on the evaporator of the embodiment of the present invention is 3mm~5mm larger than the spacing between two adjacent fins on the evaporator on the market, thereby increasing the surface heat transfer coefficient of the evaporator, thereby accelerating the speed of convective heat exchange between the air and the refrigerant in the evaporator, reducing the contact time between water vapor in the air and the evaporator, and reducing the amount of water condensation on the evaporator, thereby allowing the evaporator to continue to work normally when the refrigeration temperature is lower than 0°C to meet the freezing work requirements.

[0016] According to some embodiments of the present invention, the length of the protrusion is 3 mm, and the distance between the protrusion of one fin and the adjacent fin is 3 mm.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0021] Figure 3 is a schematic diagram of the three-dimensional structure of the pad in an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the exploded structure of the pad in an embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of the assembly structure of the buckle column and the buckle position in an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of a partial structure of the fin in an embodiment of the present invention.

[0025] Reference numerals:

[0026] 100- fin, 110- protrusion, 120- first through hole;

[0027] 200- pad, 210- second through hole, 211- first semicircular groove, 212- second semicircular groove, 220- first plate, 230- second plate, 240- buckle column, 241- elastic member, 250- buckle position, 251- large diameter groove, 252- small diameter groove, 253- arc-shaped opening;

[0028] 300-Copper tube. DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as “up”, “down”, “front”, “back”, “left”, “right”, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the description of the present invention, if “first”, “second”, “third”, etc. are described, they are only used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Reference Figures 1 to 4 and Figure 6As shown, a method for preparing an evaporator for reducing water condensation according to an embodiment of the present invention comprises the following steps: step A: selecting fins 100, selecting a corresponding number of fins 100 according to the size of the evaporator, each fin 100 is stamped with a protrusion 110, and a first through hole 120 is penetrated in the protrusion 110; step B: laminating, aligning and stacking a plurality of fins 100 in sequence, and providing a detachable pad 200 between two adjacent fins 100, one end of the pad 200 abuts against the protrusion 110, and the other end of the pad 200 abuts against the end of the fin 100 away from the protrusion 110; the corresponding pad 200 is provided on the pad 200 The position of the first through hole 120 is penetrated by the second through hole 210; Step C: Pipe penetration, select copper tubes 300 with the same number as the first through holes 120 on a single fin 100, and pass the copper tubes 300 through the first through holes 120 and the second through holes 210 to penetrate the fin 100; Step D: Pipe expansion, seal one end of each copper tube 300, and convey a liquid medium with a pressure of 6 to 10 MPa from the other end of the copper tube 300 into the copper tube 300 through a medium conveying device; after the pressure in the copper tube 300 reaches the set range, maintain the pressure for 20 to 100 seconds, so that the outer diameter of the copper tube 300 expands and fits with the first through hole 120.

[0034] Compared with the prior art, the embodiment of the present invention selects a plurality of fins 100 commonly seen on the market, and the fins 100 are stamped with protrusions 110 on the flanges. In the process of stacking the plurality of fins 100, a detachable pad 200 is provided on two adjacent fins 100, and then a plurality of copper tubes 300 are sequentially passed through the plurality of fins 100 in the left-right direction, and then a liquid medium with a pressure of 6 to 10 MPa is transported into all the copper tubes 300 through a medium transporting device; after the pressure in the copper tube 300 reaches a set range, the pressure is maintained for a period of time, so that the outer diameter of the copper tube 300 expands and is interference-fitted with the first through hole 120, so that the copper tube 300 connects the plurality of fins 100 to form an evaporator; through the separation effect of the pad 200 and the protrusion 110, the distance between two adjacent fins 100 on the evaporator is enlarged, so that the surface heat exchange coefficient of the evaporator is enlarged, thereby accelerating the heat exchange between the air and the refrigerant in the evaporator. The speed of convective heat transfer is increased, the contact time between water vapor in the air and the evaporator is reduced, and the amount of water condensed on the evaporator is reduced, so that the evaporator continues to work normally when the refrigeration temperature is below 0°C to meet the freezing work requirements; at the same time, the protrusion 110 can increase the contact area between the single fin 100 and the copper tube 300, so that the copper tube 300 can be stably connected to the single fin 100 after the tube is expanded; by setting the pad 200 to be detachable, the existing fin 100 and the existing equipment can produce an evaporator with a spacing between two adjacent fins 100 that meets the freezing work requirements with the assistance of the pad 200, and then the pad 200 can be removed from the evaporator and used as an auxiliary mold to prepare the next evaporator; with the assistance of the pad 200, an evaporator that meets the freezing work requirements can be generated on the existing fins 100 and the existing equipment, without the need for additional mold opening and purchase of new production equipment, which greatly reduces production costs.

[0035] like Figure 3 and Figure 4As shown, in some embodiments of the present invention, in step B, the pad 200 includes a first plate 220 and a second plate 230 which are separately arranged, the first plate 220 is provided with a first semicircular groove 211, and the second plate 230 is provided with a second semicircular groove 212 at a position corresponding to the first semicircular groove 211, and when installed, the first semicircular groove 211 and the second semicircular groove 212 surround a second through hole 210. In this way, during the preparation of the evaporator, the first plate 220 and the second plate 230 are connected to form a pad 200, and the second through hole 210 surrounded by the first semicircular groove 211 and the second semicircular groove 212 is for the copper tube 300 to pass through, so that the copper tube 300 is connected to all the fins 100, and the copper tube 300 can be interference fit with the first through hole 120 after the tube expansion process, so that the copper tube 300 connects multiple fins 100 into one body to form an evaporator; since the first plate 220 and the second plate 230 can be disassembled, after preparing the evaporator in which the distance between two adjacent fins 100 meets the freezing requirements, the first plate 220 and the second plate 230 can be disassembled, so that the first semicircular groove 211 and the second semicircular groove 212 are separated, so that the pad 200 is removed from the evaporator.

[0036] like Figure 3 and Figure 4 As shown, further, in step B, a buckle column 240 is convexly provided on the upper side wall of the first plate 220, and a buckle position 250 matching the buckle column 240 is provided on the lower side wall of the second plate 230. The first plate 220 and the second plate 230 are detachably connected by buckling. In the process of preparing the evaporator, the buckle column 240 is buckled on the buckle position 250, so that the pad 200 forms a whole and is placed between two adjacent fins 100 to expand the spacing, so that the spacing between two adjacent fins 100 of the prepared evaporator meets the freezing requirements; after the evaporator is prepared, the buckle column 240 can be removed from the buckle position 250, so that the first plate 220 and the second plate 230 are separated, so that the pad 200 can be removed from the evaporator and used as an auxiliary tool to prepare the next evaporator.

[0037] like Figures 3 to 5As shown, further, in step B, an inclined elastic member 241 is provided on the upper end side wall of the buckle column 240, one end of the elastic member 241 is connected to the outer side wall of the buckle column 240, and the suspended end of the elastic member 241 is arranged away from the outer side wall of the buckle column 240; the buckle position 250 is arranged as a T-shaped groove, one end of the T-shaped groove away from the buckle column 240 is a large diameter groove 251, and the other end of the T-shaped groove is a small diameter groove 252. When installed, the end of the suspended end abuts against the groove wall of the large diameter groove 251. By providing an inclined elastic member 241 on the front end side wall of the buckle column 240, in the process of buckling the buckle column 240 to the buckle position 250, the suspended end of the elastic member 241 is squeezed by the groove wall of the small-diameter groove 252 and continuously deforms close to the outer wall of the buckle column 240, thereby passing through the small-diameter groove 252. When the elastic member 241 completely passes through the small-diameter groove 252 and enters the large-diameter groove 251, the elastic member 241 elastically recovers after losing the squeezing force of the groove wall of the small-diameter groove 252, and the end of the suspended end of the elastic member 241 abuts against the groove wall of the large-diameter groove 251 to achieve buckling. The first plate 220 and the second plate 230 are stably connected and will not separate when the copper tube 300 applies force to the first semicircular groove 211 and the second semicircular groove 212 during the expansion process.

[0038] like Figure 5 As shown, further, in step B, the lower end opening of the small-diameter groove 252 is set as an arc-shaped opening 253, so that the buckle column 240 can be embedded in the buckle position 250 from any angle for clamping, which is easy to operate.

[0039] In some embodiments of the present invention, in step B, a plurality of protrusions 110 are arranged in a pattern of five horizontal and four vertical protrusions on one end surface of each fin 100, and two pads 200 are arranged between two adjacent fins 100, wherein one pad 200 abuts against the protrusions 110 at the top end of each fin 100 and located in the same horizontal row, and the other pad 200 abuts against the protrusions 110 at the bottom end of each fin 100 and located in the same horizontal row; and four second through holes 210 are arranged on each pad 200 in the front-to-back direction. In this arrangement, only two pads 200 are needed between two adjacent fins 100, so that the spacing between two adjacent fins 100 on the prepared evaporator can meet the requirements of refrigeration work. The amount of pads 200 used is reduced, and since there are only two rows of pads 200, the two rows of pads 200 are respectively arranged at the front end and the rear end of the evaporator. Compared with the area of ​​the fins 100, the pads 200 occupy very little space. After the evaporator is prepared, the heat exchange effect between the evaporator and the air will not be affected if the pads 200 are not removed. At the same time, the two rows of pads 200 are respectively arranged at the top and the bottom of the evaporator. If the pads 200 need to be removed from the evaporator, it is also convenient for the operator to disassemble the pads 200 and remove them from the evaporator. It can be understood that the horizontal direction here refers to the front-to-back direction, and the vertical direction refers to the up-down direction.

[0040] In some embodiments of the present invention, in step D, water with a pressure of 8MPa is delivered to the copper tube 300 by a medium delivery device; after the pressure in the copper tube 300 reaches the set range, the pressure is maintained for 60 seconds, so that the outer diameter of the copper tube 300 expands and fits with the first through hole 120. The copper tube 300 is expanded by delivering water with a pressure of 8MPa to the copper tube 300, and after the pressure in the copper tube 300 reaches the set range, the pressure is maintained for a period of time. The pressure maintenance is mainly to enable the copper tube 300 to fully expand, so that the distance between the outer wall of the copper tube 300 and the first through hole 120 is almost zero, and the fin 100 can be firmly connected to the copper tube 300 and is in full and close contact with the copper tube 300 to ensure the performance of the evaporator. It can be understood that the pressure maintenance here means that the pressure in the copper tube 300 is maintained in a certain pressure range for a certain period of time. Of course, here we only select a better value for the delivery pressure and pressure holding time of the water delivered to the copper tube 300. In the actual production process, the delivery pressure can be selected as 6MPa, 7MPa, 9MPa, 10MPa, and the pressure holding time can be selected as 30 seconds, 40 seconds, 80 seconds, 90 seconds, etc.

[0041] In another embodiment of the present invention, in step B, threaded holes are respectively penetrated in the up-down direction on the first plate 220 and the second plate 230, and the threaded holes are threadedly connected with the fastening screws. By tightening the fastening screws in the threaded holes, the first plate 220 and the second plate 230 are connected as one body, and the existing fins 100 and the existing equipment are used as auxiliary molds to produce an evaporator whose spacing between two adjacent fins 100 meets the requirements of refrigeration work, without the need for additional mold opening and purchase of new production equipment, which greatly reduces the production cost; at the same time, after the preparation is completed, the fastening screws can be unscrewed, so that the pad 200 can be removed from the evaporator, and used as an auxiliary mold to prepare the next evaporator.

[0042] Reference Figure 1 to Figure 2As shown, an evaporator according to an embodiment of the second aspect of the present invention is made by any of the above-mentioned preparation methods, including a plurality of fins 100, each fin 100 is stamped with a plurality of protrusions 110, a first through hole 120 is penetrated at a position corresponding to the protrusion 110 on each fin 100, a copper tube 300 is passed through the first through hole 120, the copper tube 300 is interference fit with the first through hole 120, and the copper tube 300 connects the plurality of fins 100 into one; the spacing between the protrusion 110 of one fin 100 and the adjacent fin 100 is 3 mm to 5 mm. Compared with the prior art, the embodiment of the present invention makes the distance between the outer wall of the copper tube 300 and the first through hole 120 almost zero by interference fitting the copper tube 300 and the first through hole 120, so that the fin 100 can be firmly connected to the copper tube 300, so that the copper tube 300 connects multiple fins 100 to form an evaporator and ensures the performance of the evaporator; by stamping a protrusion 110 on each fin 100, the first through hole 120 passes through the protrusion 110, and the protrusion 110 increases the contact area between the single fin 100 and the copper tube 300, so that the copper tube 300 can be stably connected to the single fin 100, thereby improving the structural stability of the evaporator; At the same time, by setting the spacing between the protrusion 110 of one fin 100 and the adjacent fin 100 to 3mm~5mm, relative to the evaporator on the market, the spacing between two adjacent fins 100 on the evaporator in the embodiment of the present invention is 3mm~5mm larger than the spacing between two adjacent fins 100 on the evaporator on the market, thereby increasing the surface heat transfer coefficient of the evaporator, thereby accelerating the speed of convective heat transfer between the air and the refrigerant in the evaporator, reducing the contact time between water vapor in the air and the evaporator, and reducing the amount of water condensation on the evaporator, thereby allowing the evaporator to continue to work normally when the refrigeration temperature is lower than 0°C to meet the freezing working requirements.

[0043] In some embodiments of the present invention, the length of the protrusion 110 is 3 mm, and the distance between the protrusion 110 of one fin 100 and the adjacent fin 100 is 3 mm. With this arrangement, the distance between two adjacent fins 100 on the evaporator is 6 mm. Compared with the evaporator with a distance of 3 mm between adjacent fins 100 produced on the existing market, the surface heat transfer coefficient of the evaporator in the embodiment of the present invention is larger, the speed of convective heat transfer between air and the refrigerant in the evaporator is faster, the contact time between water vapor in the air and the evaporator is reduced, and the amount of water condensed on the evaporator is reduced, so that the evaporator continues to work normally when the refrigeration temperature is lower than 0°C to meet the freezing work requirements.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing an evaporator for reducing water condensation, characterized in that: The following steps are involved: Step A: selecting fins (100), selecting a corresponding number of fins (100) according to the size of the evaporator, each of the fins (100) being stamped with a protrusion (110), and a first through hole (120) penetrating the protrusion (110); Step B: laminating, aligning a plurality of the fins (100) and stacking them together in sequence, wherein a detachable pad (200) is provided between two adjacent fins (100), one end of the pad (200) abuts against the protrusion (110), and the other end of the pad (200) abuts against an end of the fin (100) away from the protrusion (110); a second through hole (210) penetrates the pad (200) at a position corresponding to the first through hole (120); Step C: Pipe threading, selecting copper tubes (300) having the same number as the first through holes (120) on a single fin (100), and passing the copper tubes (300) through the first through holes (120) and the second through holes (210) to penetrate the fin (100); Step D: expanding the tube, sealing one end of each copper tube (300), and conveying a liquid medium with a pressure of 6 to 10 MPa from the other end of the copper tube (300) into the copper tube (300) through a medium conveying device; after the pressure in the copper tube (300) reaches a set range, maintaining the pressure for 20 to 100 seconds, so that the outer diameter of the copper tube (300) expands and has an interference fit with the first through hole (120).

2. The method for preparing an evaporator for reducing water condensation according to claim 1, characterized in that: In step B, the pad (200) comprises a first plate (220) and a second plate (230) which are separately arranged, the first plate (220) being provided with a first semicircular groove (211), and the second plate (230) being provided with a second semicircular groove (212) at a position corresponding to the first semicircular groove (211), and when installed, the first semicircular groove (211) and the second semicircular groove (212) enclose the second through hole (210).

3. The method for preparing an evaporator for reducing water condensation according to claim 2, characterized in that: In the step B, a buckle column (240) is protrudingly provided on the upper side wall of the first plate (220), and a buckle position (250) matching the buckle column (240) is provided on the lower side wall of the second plate (230).

4. The method for preparing an evaporator for reducing water condensation according to claim 3, characterized in that: In step B, an inclined elastic member (241) is provided on the upper side wall of the buckle column (240), one end of the elastic member (241) is connected to the outer side wall of the buckle column (240), and the suspended end of the elastic member (241) is arranged away from the outer side wall of the buckle column (240); the buckle position (250) is arranged as a T-shaped groove, one end of the T-shaped groove away from the buckle column (240) is a large-diameter groove (251), and the other end of the T-shaped groove is a small-diameter groove (252); during installation, the end of the suspended end abuts against the groove wall of the large-diameter groove (251).

5. A method for preparing an evaporator for reducing water condensation according to claim 4, wherein in the step B, the lower end opening of the small-diameter groove (252) is configured as an arc-shaped opening (253) so that the buckle column (240) can be embedded in the buckle position (250) from any angle for clamping.

6. The method for preparing an evaporator for reducing water condensation according to claim 2, characterized in that: In the step B, threaded holes are respectively penetrated in the upper and lower directions of the first plate (220) and the second plate (230), and the threaded holes are threadedly connected to the fastening screws.

7. The method for preparing an evaporator for reducing water condensation according to claim 1, characterized in that: In step B, the plurality of protrusions (110) are five horizontal and four vertical protrusions arranged on one end surface of each fin (100), and two pads (200) are arranged between two adjacent fins (100), wherein one pad (200) abuts against the protrusions (110) located in the same horizontal row at the top end of each fin (100), and the other pad (200) abuts against the protrusions (110) located in the same horizontal row at the bottom end of each fin (100); and each pad (200) is provided with four second through holes (210) in the front-to-back direction.

8. The method for preparing an evaporator for reducing water condensation according to claim 1, characterized in that: In the step D, water at a pressure of 8 MPa is delivered into the copper tube (300) by a medium delivery device; after the pressure in the copper tube (300) reaches a set range, the pressure is maintained for 60 seconds, so that the outer diameter of the copper tube (300) expands and has an interference fit with the first through hole (120).

Images