KR100342718B1 - Evaporator for Refrigerator - Google Patents

Abstract

The present invention is formed by extruding or injecting the tube and fin of the evaporator for refrigerators into an integral plastic, and by forming a protrusion of the wave wrapped in the extrusion tube for circulating the refrigerant, the evaporator for a refrigerator that can perform heat exchange while maintaining the air flow path According to the present invention, a refrigerator evaporator according to the present invention includes a heat exchanger having a predetermined shape made by using an evaporator plate of an integral plastic product extruded or injected with a plurality of tubes and fins; The inlet pipe and the outlet pipe of the extruded pipe is provided in the first bent portion in which the extruded pipe of the heat exchanger is bent, separating the refrigerant provided from the outlet pipe and providing the refrigerant in storage to the inlet pipe according to the ambient temperature 1 header; The tube of the heat exchanger is configured with a second header for supporting the bent second bending portion, and at least one protrusion having a wavy shape wrapped at a predetermined position of the tube of the heat exchanger is formed. Thus, although the material of the extruded pipe and the fin constituting the evaporator for a refrigerator is plastic, the total heat transfer coefficient provides a 30% improved heat transfer effect. In addition, since the material of the extrusion tube and the fin is an integral plastic, the weight is lower than that of the conventional refrigerator evaporator, and it can be manufactured at a low price.

Description

Evaporator for Refrigerator

The present invention relates to an evaporator for a refrigerator, and more particularly to an evaporator for a refrigerator in which the shape of the extrusion tube for distributing the refrigerant in the integrated evaporator for the refrigerator may form an air passage.

In general, a refrigerator is a device for storing and storing an object such as food at a low temperature, and is mainly composed of a storage compartment and a cooling device. Such a refrigerator includes an ice refrigerator in which an ice block is placed in the upper part of the storage compartment and fills the inside, and the freon vaporizes in the evaporator, absorbs and cools the heat in the storage compartment, and the vaporized freon is compressed. An electric refrigerator that is radiated and liquefied to a condenser, a gas refrigerator that uses an absorption chiller that uses an aqueous ammonia solution as a refrigerant, and a Peltier element for cooling and warming according to the current direction. It can be divided into an electronic refrigerator that can be used.

All refrigerators must be provided with an evaporator which performs latent heat and sensible heat exchange through evaporation of the refrigerant.

1 is a fin-tube evaporator used as a general evaporator for a refrigerator. Referring to FIG. 1, in a general refrigerator evaporator, refrigerant is introduced through a refrigerant inlet tube 12 at the left end of the evaporator, and the refrigerant is introduced into the evaporator through a refrigerant tube having a horizontal serpentine or S shape. It is discharged to the refrigerant outlet pipe (13). In this process, the refrigerant undergoes an evaporation process according to the ambient temperature and performs heat exchange through latent heat and sensible heat exchange. At this time, the refrigerant passing through the refrigerant outlet pipe 13 passes through an accumulator 18 serving as a refrigerant storage tank and a water-liquid separation.

On the other hand, the user can periodically remove the ice attached to the surface of the evaporator by driving the defrost (L-cord) heater 17, which serves as a kind of heated heater to remove the debris stuck in the refrigerator. At this time, the place that is in contact with the defrost heater 17 is mostly in line contact as the end of the fin of the evaporator, as shown in FIG.

However, the general refrigerator evaporator shown in FIG. 1 had the following problems.

First, a general fin-tube evaporator is a structure in which a plurality of tubes for distributing refrigerant are expanded in combination with fins, so that voids are likely to occur between the tube and the fin contact surfaces. Therefore, the moisture generated during the frosting / defrosting of the refrigerator is likely to penetrate between the pores, and the volume-expanded pores produced by the frosting of the penetrated moisture gradually increase the contact thermal resistance between the fin and the refrigerant pipe.

In addition, since the defrost pipe is also in line contact with the defrost pipe, the heat exchange efficiency of the refrigerator evaporator is very bad. Therefore, the deterioration of the refrigerator currently on the market is the situation that the defrosting efficiency is the most occupied.

In order to remedy this problem, an improved conventional evaporator for a refrigerator, i.e., a 휜 -refrigerator-defrosting tube integrated tri tube evaporator, shown in FIGS. 2A and 2B has been presented.

Referring to Figure 2A, the conventional tri tube evaporator evaporator fin 21, refrigerant outlet tube 23, tri tube left tube 24, tri tube right tube 25, tri tube 27, accumulator It consists of an accumulator 28 and an L-cord 29. In the conventional evaporator illustrated in FIG. 2A, the refrigerant flows through the tri tube left tube 24 at the left end of the evaporator and flows through the tri tube 27 having a serpentine or S shape, and finally the tri tube right refrigerant tube ( 25) it provides a structure that is discharged via the accumulator 28 at the exit.

However, the above tri-tube evaporator must insert a nickel-chromium resistance wire into the defrosting tube as shown in FIG. 2B, which is very difficult to work with. In addition, the reliability of such a tri-tube evaporator is not actually verified at present.

In addition, the refrigerator evaporator shown in Figures 1 and 2 were manufactured using mostly metal in order to solve problems such as heat transfer efficiency and pressure resistance. Therefore, the manufacturing cost and processing cost of the evaporator for the refrigerator was inevitably expensive, and the recyclability was poor and durability was reduced due to corrosion. In addition, the evaporator for the refrigerator is heavy, so that the overall weight of the refrigerator is large, and thus it is not easy to carry.

An object of the present invention was created in view of the above-described problems of the prior art, and is formed by extruding or injecting the tube and fin of the evaporator for a refrigerator into an integral plastic, and forming a protrusion of a wave wrapped in an extrusion tube for circulating a refrigerant. It is to provide a refrigerator evaporator capable of performing heat exchange while maintaining an air flow path.

1 is a plan view showing the structure of a typical refrigerator evaporator.

2A and 2B are plan views showing the structure of a conventional tri evaporator for a refrigerator, and sectional views of a refrigerant pipe, a fin and a defrost pipe;

Figure 3 is a plan view showing the structure of a refrigerator evaporator according to the present invention.

4 is an enlarged perspective view of the evaporator tube shown in FIG. 3 in detail.

5 is a plan view of the evaporator tube shown in FIG.

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

31 ... evaporator 휜 32 ... left header

33 ...... Inlet tube 34 ...... Column

35 ...... Right header / refrigerant storage tank

36 ...... Protrusion 37 ...... Outlet

38 ...... dividers

In order to achieve the above object, a refrigerator evaporator according to the present invention comprises a heat exchanger having a predetermined shape made by using an evaporator plate of a single piece of plastic extruded or injected into a plurality of tubes and fins; The inlet pipe and the outlet pipe of the extruded pipe is provided in the first bent portion in which the extruded pipe of the heat exchanger is bent, separating the refrigerant provided from the outlet pipe and providing the refrigerant in storage to the inlet pipe according to the ambient temperature 1 header; The tube of the heat exchanger is composed of a second header for supporting the bent second bending portion, characterized in that at least one protrusion having a wavy shape wrapped in a predetermined position of the tube of the heat exchanger is formed.

3 is a plan view showing the structure of a refrigerator evaporator according to the present invention. Referring to Figure 3, the refrigerator evaporator according to the present invention is a heat exchanger that repeatedly formed a plurality of integral extrusion pipe 34 and fin 31 to be S-shaped; The inlet tube 33 and the outlet tube 39 of the extruded tube 34 provide the inlet tube 33 and the outlet tube 39 of the extruded tube 34 to which the extruded tube 34 of the heat exchanger is bent. A first header / refrigerant storage tank 35 which provides the refrigerant being stored to the inlet pipe 33 according to the temperature of the first inlet pipe 33; The tube of the heat exchanger consists of a second header 32 which supports the bent second bend. Here, the separator 38 for internal separation is formed in the first header 35. Here, as shown in FIG. 5, the extrusion pipe 34 is formed with a protrusion 36 having an S shape or a sine wave shape.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the evaporator for a refrigerator according to the present invention shown in FIG. 3, when the refrigerant enters the refrigerant inlet tube 33, flows into the first header 35, and is filled by the partition 38, the extruder tube ( Through the tube 34, the refrigerant flows in multiple paths, and heat is transferred in the process. Subsequently, the refrigerator evaporator is introduced into the lower first header 35 after heat exchange, and is then filled by the partition 38 and discharged into the refrigerant outlet pipe 39.

Here, the extruded tube 34 and the fin 31 of the evaporator for refrigerator according to the present invention has a continuous shape of reduction and enlargement with respect to the air flow path, both sides of which are laminated to facilitate heat transfer, as shown in FIG. 5. . The present invention forms a protrusion (36) of the corrugated wave of the integral heat exchanger itself rather than a separate spaced material to ensure such characteristics to space between the tubes of the heat exchanger. In the present invention, the protrusion 36 is about 15 mm long and about 25 mm long.

According to the preferred embodiment of the present invention as described above, although the material of the extruded pipe and the fin constituting the evaporator for a refrigerator is plastic, the total heat transfer coefficient provides a 30% improved heat transfer effect. In addition, since the material of the extrusion tube and the fin is an integral plastic, the weight is lower than that of the conventional refrigerator evaporator, and it can be manufactured at a low price. In addition, since the evaporator can be made of an integral plastic, it can be made compact and can save more than 50% of manufacturing cost.

Claims (1)

A heat exchanger of a predetermined shape made by using an evaporator plate of an integral plastic, which extrudes or injects a plurality of tubes and fins; The inlet pipe and the outlet pipe of the extruded pipe is provided in the first bent portion in which the extruded pipe of the heat exchanger is bent, separating the refrigerant provided from the outlet pipe and providing the refrigerant in storage to the inlet pipe according to the ambient temperature 1 header; The tube of the heat exchanger is composed of a second header for supporting the bent second bending portion, Evaporator for a refrigerator, characterized in that at least one protrusion having a wavy shape wrapped in a predetermined position of the tube of the heat exchanger.