KR100377620B1 - Tri-tube type evaporator for Refrigerator and Manufacturing method thereof - Google Patents

Abstract

The present invention relates to an integrated evaporator for a refrigerator and a method of manufacturing the same, wherein the cooling efficiency is improved by expanding the surface area of the cooling fin, and the method for manufacturing the integrated evaporator for a refrigerator according to the present invention includes both refrigerant pipes 12 and a defrost pipe 14. ) And a forming step of forming an evaporator in which the cooling fins 16 are integrally combined, a rolling step of expanding the surface area of the cooling fins 16 by pressing and bending the cooling fins 16, and a constant cooling pin 16. A louvering step of forming a louver 17 by partially cutting and protruding at intervals, and a linear evaporator composed of a combination of the two refrigerant pipes 12, the defrosting pipes 14, and the cooling fins 16. And a bending step of bending sequentially.

Therefore, according to the manufacturing method as described above, the surface area of the cooling fins can be increased to increase the cooling efficiency, and the performance of the refrigerator can be improved by applying the evaporator manufactured in this way to the refrigerator.

Description

Tri-tube type evaporator for Refrigerator and Manufacturing method

The present invention relates to an evaporator for a refrigerator, and more particularly, to an integrated evaporator for a refrigerator and a method of manufacturing the same, in which cooling efficiency is improved by expanding the surface area of the cooling fin.

In general, a refrigerator is used for freezing food or storing food in a refrigerator, and a case for forming a storage space separated into a freezer compartment and a refrigerating compartment, and mounted on one side of the case to open and close the freezer compartment and the refrigerating compartment. It comprises a door, a device for lowering the temperature of the freezer compartment and the refrigerating chamber by forming a refrigeration cycle, such as a condenser and evaporator of the compressor.

In such a refrigerator, a low temperature low pressure gaseous refrigerant is compressed to high temperature and high pressure, and the compressed high temperature high pressure gas phase refrigerant is cooled and condensed as it passes through a condenser to be converted into a high pressure liquid phase. The temperature and pressure are lowered while passing through, and the evaporator continues to change into a low-temperature, low-pressure gas state, taking heat from the surroundings to cool the air around it. The air cooled through the evaporator is circulated into the freezing and refrigerating compartment by the operation of a blower fan, thereby lowering the temperature of the freezing compartment and the refrigerating compartment.

Here, the evaporator is composed of a refrigerant pipe through which the refrigerant flows, a defrost pipe for removing frost formed on the refrigerant pipe, and a cooling fin for widening the cooling area of the refrigerant pipe, and an interconnection structure of the refrigerant pipe, the defrost pipe, and the cooling fin. Depending on the type, it is roughly classified into a fin tube type and a tri-tube type.

The fin tube-type evaporator is a continuous steel pipe is bent continuously in the form of 'ㄹ' (cooling) made of a kind of multiple layers, and a plurality of refrigerant pipes are arranged in parallel at regular intervals by welding It is attached to the cooling panel of the thin panel form that is mounted in a form that crosses the seemingly bent refrigerant pipe, and bent along the refrigerant pipe in a state in contact with the cooling fin, and a heating element such as a heating wire therein It consists of a defrosting tube provided.

In addition, the integrated evaporator was developed to prevent degradation of manufacturing efficiency and cooling efficiency caused by the structure of the fin tube type evaporator, as shown in FIGS. 1 and 2, and a pair of refrigerant tubes 12 and 12, and the two Defrost pipe 14 located between the refrigerant pipes 12, 12, and the cooling fins 16 integrally formed in the form of connecting each of the refrigerant pipes 12, 12 and the defrost pipe (14) Consists of. Here, the coolant pipe 12, the defrost pipe 14 and the cooling fins 16 are bent to form a continuous 'd' form, the cooling fins 16 has a straight cross section.

In addition, the cooling fin 16 is provided with a louver (17) having a plurality of vents in series and forming an opening opening in a different direction up and down each of the vents so that the air passing through the vents to create a turbulent flow, The louvers 17 may be made to face in opposite directions with respect to the defrost pipe 14 so that more powerful turbulence is formed.

Therefore, the integrated evaporator has a higher manufacturing efficiency than the fin tube type evaporator which is manufactured by attaching a plurality of cooling fins to the refrigerant tube by welding or mechanical expansion, and the refrigerant tube 12 and the cooling fins 16. Since the contact portions of are formed continuously, the cooling efficiency is also relatively high compared to the fin tube type evaporator.

On the other hand, the manufacturing method for manufacturing a conventional integrated evaporator for a refrigerator as described above is to integrally mold both refrigerant pipes 12, 12, defrost pipes 14 and cooling fins 16 by extrusion molding or the like. A molding step, a louvering step of forming the louver 17 on the cooling fins 16, and a bending step of partially bending the evaporator 10, which is formed in a substantially straight line through the above steps, through bending means.

Here, the bending means is one main roller jig 20, a pair of auxiliary roller jig 30 made of the same structure as the main roller jig 20, and the main as shown in FIG. It consists of an actuator (not shown) for driving the roller jig 20, the main roller jig 20 is associated with the actuator to enable reciprocating linear motion, each auxiliary roller jig 30, 30 is It is fixedly installed.

In this way, the refrigerant pipe 12 at the bending part of the evaporator 10, that is, the area in contact with the main roller jig 20, is bent along the outer peripheral surface of the roller 22 of the main roller jig 20, and is symmetrical. It is press-molded between the roller 22 of the main roller-type jig 20 and the roller 32 of the auxiliary roller-type jig 30 which contact | contacts and press-contacts mutually.

On the other hand, the cooling efficiency of the evaporator 10 is greatly affected by the surface area of the refrigerant pipe 12 and the cooling fins 16, according to the prior art as described above the cooling fins provided between the refrigerant pipes 12 Since the cross-sectional shape of (16) is a simple straight line and its surface area is not large, it does not help much in improving the cooling efficiency of the evaporator 10.

The present invention has been made to solve the above-mentioned conventional problems, and for the purpose of providing an integrated evaporator for a refrigerator and a method of manufacturing the same, which is made of a structure in which the surface area of the cooling fin is enlarged without changing the space between the refrigerant pipes. do.

1 is a perspective view showing the structure of a general integrated evaporator for a refrigerator.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

Figure 3 is a schematic diagram showing a bending step according to the conventional method for manufacturing an integrated evaporator for a refrigerator.

Figure 4 is a schematic diagram showing the rolling step in the manufacturing method of the integrated evaporator for a refrigerator according to an embodiment of the present invention.

5 is a plan view showing the structure of the up and down rolling roller used in the rolling step in the method of manufacturing the integrated evaporator for a refrigerator according to an embodiment of the present invention.

6 is a cross-sectional view showing the structure of an integrated evaporator for a refrigerator according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: evaporator 12: refrigerant tube

14: defrosting pipe 16: cooling fin

17: louver 40: upper rolling roller

40a: refrigerant pipe guide groove 40b: crimp groove

40c: defrosting pipe guide groove 42: lower rolling roller

42a: refrigerant pipe guide groove 42b: crimp protrusion

42c: defroster guide groove

In order to achieve the above object, a method of manufacturing an integrated evaporator for a refrigerator is provided by a molding step of forming an evaporator in which both refrigerant pipes, defrost pipes, and cooling fins are integrally combined, and expanding the surface area of the cooling fins by pressing and bending the cooling fins. A rolling step, a louvering step of forming a louver by partially cutting and projecting the cooling fins at regular intervals, and sequentially bending the linear evaporator composed of a combination of the two refrigerant pipes, the defrosting pipe, and the cooling fins at a predetermined interval. It comprises a bending step.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 4 to 6, and like reference numerals refer to like parts of the present invention.

First, a method of manufacturing an integrated evaporator for a refrigerator according to an embodiment of the present invention includes a rolling step performed after a molding step of forming an evaporator in which both refrigerant pipes, defrost pipes, and cooling fins are integrally combined.

In the rolling step, as shown in FIG. 4, the cooling fins 16 are pressed and bent through rolling means such as upper and lower rolling rollers 40 and 42. The upper and lower rolling rollers 40 and 42 are shown in FIG. As shown, a pair of refrigerant pipe guide grooves 40a and 42a which are spaced apart from each other at predetermined intervals and surrounding the outer surface of the refrigerant pipe 10 are formed. A compression groove 40b is formed between the guide grooves 40a of the upper rolling roller 40, and a compression protrusion part formed in the compression groove 40b between the guide grooves 42a of the lower rolling roller 42. 42b) is formed.

The pressing groove 40b and the pressing protrusion part 42b are formed to form a gap having a specific structure in a joined state so as to be able to press bending the cooling fin 16.

In the center of the upper and lower rolling rollers 40 and 42, defrosting pipe guide grooves 40c and 42c are formed at positions corresponding to each other so that the defrosting pipe 14 is not affected when the cooling fins 16 are compressed. .

According to such a rolling means, while passing through the linear evaporator 10 between the upper and lower rolling rollers 40 and 42, the cooling fin 16 is expanded and deformed. At this time, the shape of the refrigerant pipe 12 is not changed, and only the cooling fins 16 are deformed so as not to affect the flow state of the refrigerant.

As a result of the rolling step, the compression-deformed cooling fins 16 are reduced in thickness by about a quarter as compared to the conventional one, and are partially bent to form a gap between the two refrigerant pipes 12.

After the rolling step, a louvering step of forming a louver 17 (imaginary line shown in the drawing) by partially cutting and projecting the cooling fins 16 at regular intervals, and the coolant pipes 12 and the defrost pipe 14 ) And a bending step of sequentially bending a linear evaporator composed of a combination of cooling fins 16 at regular intervals.

The refrigerator integrated evaporator manufactured by the manufacturing method according to the embodiment of the present invention as described above, compared to the conventional integrated evaporator for refrigerators, the cooling fin ( Only the surface area of 16) is expanded by about 10%.

Therefore, the evaporator manufactured by the manufacturing method according to the present embodiment exhibits a higher cooling efficiency than the evaporator provided with a conventional straight cooling fin.

As described above, according to the present invention, the surface area of the cooling fins can be expanded to produce an evaporator having a high cooling efficiency, and the evaporator has an advantage of improving the performance of the refrigerator.

Claims (2)

A molding step of forming an evaporator in which both refrigerant pipes, defrost pipes, and cooling fins are integrally combined; Rolling step of expanding the surface area of the cooling fins by pressing bending the cooling fins; A louvering step of forming a louver by partially cutting and projecting the cooling fins at regular intervals, Bending step of sequentially bending the linear evaporator composed of the combination of the two refrigerant pipes, defrost pipes and cooling fins at regular intervals Integrated evaporator manufacturing method for a refrigerator comprising a. An integrated evaporator for a refrigerator comprising a cooling fin having a bent structure by being manufactured by the method of manufacturing an evaporator of claim 1.