KR200159036Y1 - A heating apparatus for two fold defrost of a refrigerator - Google Patents

Abstract

The double defrost heating device of the refrigerator according to the present invention, the evaporator is mounted so as to exchange heat with cold cold in surface contact with the warmth rising to the inner mounting space of the cabinet, the frost formed on the evaporator under the evaporator and freezing state A refrigerator in which a defrost heater of a quartz tube heating method is installed to be melted, wherein a plurality of cord heaters are installed at an upper end of the evaporator so as to generate heat in the upper and left and right corners of the evaporator having poor heat transfer while being turned on by receiving power. Therefore, the heat transfer is supplemented to the weak parts of the upper and left and right corners of the evaporator, which cannot transmit heat of the defrost heater, to prevent afterimages and residual ice accumulated in the evaporator, and to make heat exchange smoothly. Can fundamentally solve the cause of poor cooling of the refrigerator All.

Description

Dual defrost heating device of refrigerator

The present invention relates to a double defrost heating device of the refrigerator, and more particularly to a double defrost heating device of the refrigerator to completely remove the frost and freezing state generated during the cooling operation of the evaporator.

Conventional refrigerators, as shown in Figure 1, the object (for example, stored food and storage containers, etc. required for freezing and refrigeration at the upper and lower portions through the intermediate member 20 on the inner middle side of the cabinet 10, as shown in FIG. The freezing and refrigerating chambers 30 and 40 are partitioned into a predetermined space so as to be stored and frozen and refrigerated. The air flow (air) inside the freezing and refrigerating chambers 30 and 40 is located at the rear side of the freezing chamber 30. Cold air circulation means (50) is provided to force the circulation of the force, and the rear side of the cabinet 10 at the rear side in the freezing chamber (30) in accordance with the operation of the cold air circulation means (50) A damper cover 60 having cold air discharge and suction holes 61 and 62 formed to guide the flow of cold air blown and at the same time to form a cold air environment path in which the cold air is discharged to the upper side of the freezing chamber 30 and sucked downward. Is installed.

At this time, the cold air circulation means 50 is a blown motor 51 is driven by receiving power, a blowing fan 52 that rotates in accordance with the driving of the blower motor 51, and the blower motor 51 The bracket 53 is fixed to the cabinet 10.

The lower part of the cold air circulation means 50 with respect to the damper cover 60 and the cabinet 10 in the freezing and refrigerating chambers 30 and 40 circulated by the blowing force of the cold air circulation means 50. An evaporator 70 is installed to exchange the cold air with the cold cold again, and the power supply is provided at the lower part of the evaporator 70 to remove frost formed on the surface of the evaporator 70 when the evaporator 70 is operated for a long time. The defrost heater 80 is installed to be turned on and off at regular intervals upon receiving a predetermined time. The defrost heater 80 has a lower portion of the defrost heater 80 when the energization of the defrost heater 80 is turned on. The drain hose 90 is installed inside the rear wall of the cabinet 10 so as to drain the defrost water generated during the defrosting process.

Here, the evaporator 70, as shown in FIG. 2, both side support plates 71 arranged left and right at a predetermined distance from both inner side walls of the mounting space P formed at the inner lower end of the cabinet 10, and the Two pairs of the plurality of refrigerant pipes 72 provided at regular intervals in the vertical direction between the two support plates 71 and the ends of the plurality of refrigerant pipes 72 protruding to the outer sides of the both support plates 71. A plurality of return band pipes 73 connected to each other and a refrigerant temperature flowing inside the refrigerant pipe 72 on the outside of the plurality of refrigerant pipes 72 conduct heat to generate heat of the refrigerant, and at the same time, the evaporator 70. Consists of a plurality of heat transfer fins 74 are installed at a predetermined interval to the left and right so as to cool the surface heat exchange with the air rising through the lower portion of the.

At this time, an accumulator (75) is installed at one end of the upper refrigerant pipe (72) among the plurality of refrigerant pipes (72), and one side of the outer circumferential surface of the accumulator (75) is formed of the defrost heater (80). Bimetal Thermo (77) is provided to be bundled by the cable band 76 so as to cut off the power primarily due to the constant overvoltage or failure. The defrost heater 80 is disposed at the lower end of the bimetal thermo 77. A thermo-fuse 79, which is electronically connected via a temperature cable 78, is installed so as to shut off the power secondarily due to overvoltage or failure during defrosting.

On the other hand, the both ends of the defrost heater 80 is connected to the positive and negative heater cables 81, 82 so that the AC voltage applied from the power supply means (not shown) is connected, these positive and negative heater cables 81 82 is drawn upward through a predetermined gap formed between both side support plates 71 of the evaporator 70 and the inner wall of the cabinet 10.

In this case, the positive and negative heater cables 81 and 82 are bundled together with the bimetal thermo 77 by the cable band 76 wound around the accumulator 75 according to the mounting method so as not to be loosely fixed.

In addition, the lower end of the cabinet 10 receives the defrost water drained along the drain hose 90 and the collected defrost water is evaporated by the compression heat of the compressor described later. An evaporation plate 110 is installed at an upper portion of the machine room 100 formed at the rear side, and a compressor 120 is installed at the lower portion of the evaporation plate 110 to compress the circulating refrigerant at a high temperature and high pressure. 10, a condenser 130 is installed on the outer rear wall to receive the gas refrigerant compressed to high temperature and high pressure by the compression action of the compressor 120 and condense it by natural convection.

On the rear side of the intermediate member 20, the first cold air passage 150 of a predetermined interval is formed by the cold air flow guide plate 140 so that the cold air heat exchanged while passing through the evaporator 70 is discharged to the refrigerating chamber 40. On the other side of the intermediate member 20, a second cold air passage 160 of a predetermined interval is formed so that the cold air in the refrigerating chamber 40 passes through the evaporator 70, the first cold air passage 150 The temperature controller 170 is installed at the upper rear side of the refrigerating chamber 40 to adjust the supply amount of the cold air discharged to the refrigerating chamber 40 through multiple stages (for example, strong cooling or weak cooling).

The front and rear openings of the freezing and refrigerating chambers 30 and 40 are provided with freezing and refrigerating chamber doors 180 and 181 coupled at one end by hinge means (not shown) to open and close in an opening and closing manner. A plurality of shelving means 190 are installed at a predetermined height within 40 so as to be detachable at a predetermined interval from each other so as to load the object.

However, according to the conventional double defrost heating apparatus configured as described above, as shown in FIG. 2, the heat of the defrost heater 80 that is turned on in response to the application of the current during defrosting is transferred through the lower portion of the evaporator 70. Defrost heater 80 is formed by melting the frost and frost formed on the surface of the refrigerant pipe 72 and the heat transfer fin 74 of the evaporator 70 while rising by the convection action. Because of the quartz tube heating method is installed a certain distance away to the lower side of the evaporator (70) when defrosting, the afterimage and residual ice will remain as the heat is not sufficiently transferred to the upper and left corners of the evaporator (70), In this case, when afterimages and residual ice accumulate for a long time, the heat exchange of the evaporator 70 is not smoothly performed, causing a poor cooling of the refrigerator.

Therefore, the present invention has been made to solve the above problems, an object of the present invention is to install a plurality of code heaters (Code Heater) in the upper refrigerant pipe of the upper side of the evaporator, the top of the evaporator that heat of the defrost heater is not transferred And by supplementing the heat transfer to the weak parts of the left and right corners to prevent the afterimage and residual ice accumulated in the evaporator in advance and to make the heat exchange smoothly, thereby fundamentally solving the cause of the poor cooling of the refrigerator. It is to provide a dual defrost heater device of the refrigerator.

The double defrost heating device of the refrigerator according to the present invention made to achieve the above object, the evaporator is mounted so as to perform heat exchange with cold cold in surface contact with the warmth raised to the inner mounting space of the cabinet, the evaporator under the evaporator A refrigerator in which a defrost heater of a quartz tube heating method is installed to melt frost and freezing formed in the refrigerator, wherein the upper side of the evaporator is turned on by receiving power and generates heat in the upper and left and right corners of the evaporator having poor heat transfer. Characteristic characterized in that the code heater is installed.

1 is a longitudinal cross-sectional view showing a conventional refrigerator,

2 is an internal view showing an installation state of a conventional evaporator,

3 is an internal view showing an installation state of an evaporator mounted with a double defrost heating apparatus according to the present invention.

Explanation of symbols for main parts of the drawings

70: evaporator 72: refrigerant tube

80: defrost heater 300: code heater

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

For reference, the same components and the same reference numerals are assigned to the same components as the conventional components in the drawings, and detailed description thereof will be omitted.

In the drawing, reference numeral 300 denotes the evaporator 70 and the upper and left and right corners of which heat transfer is weak while simultaneously operating on or alternately with the defrost heater 80 of the quartz tube heating method installed in the lower part of the evaporator 70. It shows a plurality of code heaters installed in the plurality of refrigerant pipes 72 on the upper side of the evaporator 70 to replenish heat.

That is, the plurality of cord heaters 300 is the length of the upper portion of the refrigerant pipe 72 of the portion of the plurality of refrigerant pipes 72 installed at regular intervals up and down on the evaporator 70, as shown in FIG. Therefore, it is closely bonded to the lower part of the surface.

Next, the operation and effects of the present invention configured as described above will be described.

When the compressor 120 installed in the lower part of the cabinet 10 is operated by turning on the main switch (not shown) in order to reach the predetermined temperature, the freezing and refrigerating chambers 30 and 40 are compressed. The high-temperature, high-pressure gas refrigerant compressed by the action flows along the inside of the condenser 130, thereby condensing.

Then, the gas refrigerant condensed while passing through the condenser 130 is phase-reduced into a high temperature and high pressure liquid refrigerant at a temperature slightly higher than the room temperature, which is the ambient temperature of the refrigerator, and decompressed by passing through a capillary tube (not shown). The vapor is introduced into the evaporator 70 and expanded to vaporize at a low temperature and low pressure, and at the same time, evaporate to cool.

On the other hand, when the blower fan 52 is rotated by receiving the power of the blower motor 51 as the blower motor 51 of the cold air circulation means 50 is operated, the freezing and cooling by the blower of the blower fan 52 Warmth in the refrigerating chambers 30 and 40 merges into the lower part of the evaporator 70 through the cold air suction hole 62 formed in the damper cover 60 and the second cold air passage 160 formed in the rear side of the intermediate member 20. At the same time as being raised to pass through the evaporator 70 is exchanged with cold cold by the cooling action of the evaporator 70 described above.

At this time, the cold air heat exchanged through the evaporator 70 is discharged into the freezing chamber 30 through the cold air discharge hole 61 formed in the upper end of the damper cover 60 in accordance with the rotation of the blower fan 52 to freeze the chamber 30 The object stored therein is frozen at a low temperature, and some cold air is introduced into the temperature controller 170 through the first cold air passage 150 formed at the rear side of the intermediate member 20 under the guidance of the cold air flow guide plate 140. At the same time, by controlling the cold air of the temperature control driving unit (not shown), the supply amount is controlled by strong cooling or weak cooling, and then discharged into the refrigerating chamber 40 to cool the object stored in the refrigerating chamber 40 to a low temperature.

On the other hand, if the defrost heater 80 is operated at regular intervals in order to remove the frost formed on the surface of the evaporator 70, the defrost heater 80 of the quartz tube heating method is supplied with power to heat the heat The heat is raised from the lower side to the upper side of the evaporator 70 according to the convection method and simultaneously melts frost and freezing formed on the surface of the evaporator 70.

However, the rising heat generated from the defrost heater 80 of the quartz tube heating method passes from the bottom to the top when passing through the plurality of refrigerant pipes 72 and the heating fins 74 arranged at regular intervals in the evaporator 70. As it does not pass smoothly by a plurality of heat transfer fins 74 installed in tightly spaced left and right intervals, sufficient heat cannot be supplied to the upper and left and right corners of the evaporator 70.

At this time, when the plurality of cord heaters 300 installed in the plurality of refrigerant pipes 72 on the upper side of the evaporator 70 are turned on at the same time or sequentially alternately with the defrost heater 80 of the quartz tube heating method, The heat generated from the code heater 300 immediately melts the afterimage and remaining ice formed on the top of the evaporator 70 while intensively supplying heat to the top and left and right corners of the evaporator 70 having poor heat transfer. Smoothing the flow of warmth in the furnace, which is raised during the cooling operation of 70, increases heat exchange.

On the other hand, the water generated during defrost falls to the defrosting receiver (not shown) installed in the lower part of the evaporator 70 and is collected at the same time the outside of the cabinet 10 along the drain hose 90 is connected to the defrosting receiver and the passage Collected by the bottom of the evaporation plate 110 is installed, the water collected in the evaporation plate 110 is the evaporation plate 110 the heat of compression generated during operation of the compressor 120 installed in the lower portion of the evaporation plate 110. It is evaporated into the atmosphere by conduction through.

As described above, according to the double defrost heating apparatus of the refrigerator according to the present invention, the top and left and right corners of the evaporator, which is weak in heat transfer while operating alternately or sequentially with the quartz tube heating type defrost heater installed at the bottom of the evaporator. Since a plurality of cord heaters are additionally installed in the plurality of refrigerant pipes on the upper side of the evaporator to replenish heat, the heat transfer is supplemented to the weak parts of the upper and left and right corners of the evaporator where heat of the defrost heater cannot be transferred. At the same time to prevent the afterimage and residual ice accumulated in the evaporator, and at the same time to facilitate the heat exchange, this has the effect that can fundamentally solve the cause of the weak cooling of the refrigerator.

Claims (4)

An evaporator is mounted to exchange heat with cold cold in contact with the warmth rising to the inside of the cabinet, and a defrost heater of a quartz tube heating method is mounted on the lower part of the evaporator to melt frost and freezing formed in the evaporator. In the refrigerator, the upper defrost heating apparatus of the refrigerator, characterized in that a plurality of cord heaters are installed to generate heat in the upper and left and right corners of the evaporator is weak heat transfer while the power is applied to the upper end of the evaporator. The dual defrost heating apparatus of claim 1, wherein the plurality of code heaters are configured to operate by being supplied with power simultaneously with the defrost heater. The dual defrost heating apparatus of claim 1, wherein the plurality of code heaters are configured to operate by receiving power sequentially from the defrost heater. The double defrost heating apparatus of claim 1, wherein the plurality of cord heaters are closely bonded to a lower portion of the plurality of cord heaters along the length of the upper portion of the refrigerant pipes of the plurality of refrigerant pipes installed in the evaporator. .