KR100236341B1 - Condenser for refrigerator - Google Patents

Abstract

The present invention relates to a condenser for a refrigerator to increase the heat transfer area and to simplify the manufacturing process of the condenser to facilitate heat exchange between the refrigerant flowing in the condenser and the external air.

To this end, the present invention continuously bending the bi-pin tube 101 in which the fin 14 is integrally formed along both sides of the outer circumferential surface of the tube 13 through which the refrigerant flows to be inclined at a predetermined angle θ in an " S " shape. And, the bi-pin tube 101 is bent to overlap with the bent bi-pin tube 101.

Description

Condenser for refrigerator

The present invention relates to a refrigerator, and more particularly to a condenser for a refrigerator.

In general, the refrigerator is a product that allows the food to be kept fresh for a long time by lowering the temperature as the refrigerant cycle is repeatedly compressed, condensed, and evaporated. .

Looking at the refrigeration cycle process of the refrigerator, if the low-temperature, low-pressure gas refrigerant is adiabatic compressed by the compressor to form a high temperature and high pressure refrigerant and sent to the condenser, the high temperature and high pressure refrigerant in the condenser is cooled and condensed by external air It becomes a high-pressure subcooled liquid at a temperature of 40 ° C. and a pressure of 9 atm, and the high-pressure subcooled liquid is decompressed to a low-temperature low-pressure refrigerant while passing through a capillary tube relatively narrow compared to the diameter of the refrigerant pipe of the other part. The refrigerant depressurized by the low temperature and low pressure refrigerant flows into the evaporator and evaporates from a low pressure (0 atm or less) to a low temperature (-30 ° C.), thereby absorbing hot air in the refrigerator and converting it into cold air. The inside of the refrigerator is cooled.

The refrigeration cycle as described above continues until the temperature in the refrigerator reaches the set temperature, and when the set temperature reaches the set temperature, the refrigerator detects that the set temperature has been reached and temporarily operates the refrigerator until the temperature rises above the set temperature by the microcomputer. Stopping prevents overcooling and wastes of unnecessary power consumption.

The refrigerator operated by the refrigeration cycle as described above includes a main body 1 as shown in FIG. 1; A freezer compartment (2) for maintaining a room temperature of -12 to -24 deg. C at a relatively low temperature in order to preserve frozen food in the main body (1); A refrigerating chamber 3 which maintains a room temperature of about 0 to 7 ° C. in order to keep the food for refrigeration in the lower part of the freezing chamber 2; Doors (4) (5) coupled to open and close the chambers in front of the freezing chamber (2) and the refrigerating chamber (3); A freezing fan (6) installed at the rear of the freezing chamber (2) and rotated to send cold air into the freezing chamber (2); A freezer compartment suction port 7 formed at a rear surface of the freezer compartment 2; A cold air circulation duct 8 formed to circulate cold air between the refrigerating chamber 3 and the freezing chamber 2; A compressor (9) installed at the rear bottom surface of the refrigerating chamber (3) to compress the refrigerant at high temperature and high pressure; A condenser (10) for condensing the high temperature and high pressure refrigerant compressed by the compressor (9) into a high pressure subcooled liquid; A condensation fan (11) installed at a side of the condenser (10) and rotated to send external air to the condenser (10) to exchange heat with the refrigerant flowing in the condenser (10); It is installed in the rear of the freezing chamber (2) consists of an evaporator (12) is passed through the capillary tube in the condenser 10, the refrigerant is introduced to evaporate to a low temperature low pressure refrigerant through heat exchange with the air in the oven.

Referring to the operation of the refrigerator configured as described above are as follows.

When the refrigerator is freezing, only the freezing fan 6 is rotated, and the air whose temperature rises while circulating inside the refrigerating compartment 3 by the rotational force of the freezing fan 6 is an evaporator installed at the rear of the freezing compartment 2 ( 12 through the heat exchange to form a low-temperature air, the low-temperature air is the low-temperature air again through the freezer compartment inlet (7) formed in the rear of the freezer compartment 2 by the rotational force of the freezing fan (6) 2) It is forced to flow into.

As described above, the low-temperature air forced into the freezing chamber 2 is circulated in the freezing chamber 2 to freeze the food in the freezing chamber 2, and then discharged to the outside of the freezing chamber 2 to discharge the inside of the cold air circulation duct 8. While flowing, a part of the low temperature air is sent to the evaporator 12, and the other part flows into the refrigerating chamber 3 to circulate inside the refrigerating chamber 3 to lower the refrigerating chamber 3.

The air whose temperature is raised while lowering the refrigerating chamber 3 is discharged to the outside of the refrigerating chamber 3 and flows through the cold air circulation duct 8 while passing through the evaporator 12 installed at the rear of the freezing chamber 2. After cooling again with low temperature air, it is introduced into the freezing compartment 2 again by the rotational force of the freezing fan 6.

By the above-mentioned freezing cycle, the process of heat-exchanging with cold again at low temperature is repeated until the proper temperature is reached.

At this time, the refrigerant introduced into the evaporator 12 and heat-exchanged with the air in the refrigerator is introduced into the compressor 9 installed at the rear bottom of the refrigerating chamber 3 to be compressed into a refrigerant having a high temperature and high pressure. The compressed refrigerant is sent to the condenser 10, where external air flows into the condenser 10 while flowing through the condenser 10 by the rotational force of the condenser fan 11 installed on the side of the condenser 10. Since the heat exchange with the refrigerant is made, that is, the heat of the refrigerant is released to the outside air, the refrigerant flowing in the condenser 10 is condensed into a high pressure subcooled liquid.

Here, the condenser 10 includes a tube 13 installed to allow the refrigerant flowing into the condenser 10 to flow; The refrigerant flowing in the tube 13 is composed of a plurality of fins 14 welded to the upper and lower surfaces of the tube 13 so that heat exchange with the external air is performed smoothly.

The material of the tube 13 and the fin 14 is formed of steel.

In the condenser configured as described above, the refrigerant compressed by the high temperature and high pressure in the compressor 9 is introduced into the condenser 10, and the refrigerant introduced into the condenser 10 flows through the tube 13 of the condenser 10 to the outside. The heat exchange with the air is made, whereby a plurality of fins 14 welded to the outer circumferential surface of the tube 13 makes the heat exchange between the refrigerant flowing in the tube 13 and the outside air more smoothly. . That is, the heat exchange area is widened by the fins 14 coupled to the outer circumferential surface of the tube 13 of the condenser 10 so that the heat of the refrigerant flowing in the tube 13 is smoothly discharged to the outside air. The high temperature and high pressure refrigerant flowed into is condensed into a high pressure subcooled liquid.

Here, the method of manufacturing the condenser 10 is a long tube 13, which is a straight tube, is bent in a sand shape using a bending machine, and then a plurality of fins 14 on the upper and lower surfaces of the bent tube 13 When placed in a certain position by the jig, the spot 14 is bonded to the upper and lower surfaces of the tube 13 by spot welding, and then the tube 13 to which the fin 14 is coupled is overlapped with each other. Bend to

That is, after bending one side of the tube 13 in a state of being bent in a sand shape and fixing the one side of the tube 13 to which the fins 14 are coupled to the upper and lower surfaces, the tube 13 is bent so as to overlap one side of the tube 13. The other side of the bent tube 13 is bent again in the opposite direction to the direction in which the first bend again, and the tube 13 is continuously bent as described above, so that the condenser 10 has a constant shape, that is, a rectangular parallelepiped or The condenser 10 is formed in the shape of a cube and is fixed to the rear surface of the refrigerator.

However, the condenser of the conventional refrigerator by manually bending the tube by using a bending machine, and then put the pin on the upper and lower surfaces of the bent tube in a certain position and then spot (spot) to couple the fin to the tube It takes a lot of work time to produce a condenser, there is a problem that the workability is reduced because work loss occurs.

In addition, the distance between the fins coupled to the bottom surface of the condenser tube is wide, and the amount of air passing through the condenser is not only large, but also the heat exchange area of the condenser is small. There was also a problem that the condensation efficiency of the condenser is not lowered smoothly.

In addition, since the condenser tube and the fin are formed of steel (steel), the condenser is not only heavy but also has a problem in that the price is increased.

The present invention has been made to solve the above problems, the purpose is to increase the heat transfer area to simplify the heat exchange between the refrigerant flowing in the condenser and the outside air and to simplify the manufacturing process of the condenser. .

In order to achieve the above object, the present invention continuously bends the bi-pin tube in which the fins are integrally formed along both sides of the outer circumferential surface of the tube through which the refrigerant flows in an " S " A condenser of a refrigerator is provided, characterized in that the bi-pin tube is bent so as to overlap with each other.

1 is a structural diagram of a typical refrigerator.

2 is a structural diagram showing a conventional condenser of a refrigerator.

3 is a structural diagram showing a condenser of the present invention of a refrigerator.

Figure 4a is a plan view showing the present invention condenser of the refrigerator.

Figure 4b is a front view showing the present condenser of the refrigerator.

Figure 4c is a side view showing the present invention condenser of the refrigerator.

Figure 5 is a structural diagram showing the present invention bi-pin tube of the refrigerator.

Explanation of symbols for the main parts of the drawings

101: bi-fin tube 102: bracket

103: coupling hole 104: louver

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 5 as follows.

3 is a structural diagram showing the present invention condenser of the refrigerator, Figure 4a is a plan view showing the present invention condenser of the refrigerator, Figure 4b is a front view showing the present condenser of the refrigerator, Figure 4c is a side view showing the present invention condenser of the refrigerator 5 is a structural diagram showing a bi-fin tube of the present invention of a refrigerator, and the present invention is a bi-fin tube in which fins 14 are integrally formed along both sides of an outer circumferential surface of a tube 13 through which a refrigerant flows. tube) 101; A plurality of louvers 104 are formed in the pin 14, and the bi-pin tube 101 is continuously bent in an “S” shape.

A plurality of brackets 102 are installed to support the bi-pin tube 101, and coupling holes 103 are formed at both ends of the bracket 102 to fasten screws and screws.

The material of the bi-pin tube 101 is made of aluminum (Al).

The operation of the present invention configured as described above is as follows.

First, an elongated bi-pin tube 101 having an integrally formed pin 14 along both sides of the outer circumferential surface of the tube 13 through which the refrigerant flows is extruded, and after the molding of the bi-pin tube 101 is completed, A plurality of louvers 104 are formed in the pin 14 of the bi-pin tube 101 by press working or punching.

As described above, when the bi-pin tube 101 is molded to the "S" shape using a bending machine to be inclined at a predetermined angle (θ) while going from one side to the other side with respect to one side of the bi-pin tube 101 The bi-pin tube 101 is continuously bent and the inclined direction of the bi-pin tube 101 bent in the "S" shape remains the same and the first bi-pin tube 101 is bent in the "S" shape. ) And the other side of the bi-pin tube 101 to be bent in the "S" shape so as to overlap with each other.

The condenser 10 is formed of a cube or a cube because the bi-pin tubes 101 of the same shape continuously bent in the “S” shape are bent continuously to overlap each other.

As such, when the expander 10 is formed, one side of the bi-pin tube 101 of the condenser 10, that is, between the bending portions (a) of the bi-pin tube 101 bent in an “S” shape. The brackets 102 as shown in FIG. 5 are inserted therebetween, and then inserted into and coupled to the respective coupling holes 103 formed at both ends of the brackets 102 using screws, screws, bolts, and nuts. It is firmly fixed to the back of the refrigerator.

The refrigerant compressed at high temperature and high pressure in the compressor 9 flows into the condenser 10 fixed by the bracket 102 on the rear surface of the refrigerator, and flows into the condenser 10, that is, the bi-pin tube 101. The high temperature and high pressure refrigerant flowing through the inlet of the tube 13 flows through the tube 13 of the bi-pin tube 101 while performing heat exchange with external air.

At this time, the heat of the refrigerant flowing in the tube 13 is smoothly discharged to the outside air by the fins 14 integrally formed along both sides of the outer circumferential surface of the tube 13, and the condenser is rotated by the condenser fan 11. Since the outside air sent to the (10) exits through a plurality of louvers 104 formed in the pin 14 of the bi-pin tube 101, the refrigerant flowing in the tube 13 and heat exchange more smoothly The refrigerant is condensed into a high pressure subcooled liquid, and the refrigerant condensed into the high pressure subcooled liquid is discharged to the outside of the condenser 10 through the outlet of the tube 13 of the bi-pin tube 101.

As described above, the present invention continuously bends the bi-pin formed integrally with the fins in an inclined manner at a predetermined angle (θ) along both sides of the outer circumferential surface of the tube through which the refrigerant flows, and the bent bi-pin tube formed in a constant shape. As the condenser is continuously formed so as to overlap each other, the heat transfer area of the condenser is increased so that the heat dissipation coefficient is increased, so that the heat exchange between the refrigerant flowing in the tube and the external air is smooth, so that the condenser efficiency of the condenser is improved. It works.

In addition, since the tube and the fin of the condenser are integrally formed, the welding area between the tube and the fin is reduced, and the process of manufacturing the condenser is simplified, thereby reducing the manufacturing time of the condenser and improving workability and reducing the manufacturing cost of the condenser. In addition, the material cost of the condenser is reduced.

In addition, since the material of the bi-pin tube is made of aluminum (Al), not only the weight of the condenser is light but also the cost of the condenser is reduced.

Claims (1)

The bi-pin tube with flat plate pins integrated on both sides of the tube is repeatedly bent in a sand shape, giving a constant draft angle from front to back, The front of the bent biffin tube is installed to cross the bracket, the condenser of the refrigerator characterized in that the fixing to the bottom surface of the refrigerator.

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