KR20120134251A - System for defrost in the refrigerator and method thereof - Google Patents

Abstract

PURPOSE: A defrosting system of refrigerators capable of defrosting without temperature change inside a room and a defrosting method thereof are provided to effectively defrost by installing two cooling units inside the room. CONSTITUTION: A defrosting system of refrigerators comprises a first room temperature detection sensor(110), a second room temperature detection sensor(120), a first cooling driving unit(160), a second cooling driving unit(170), a first defrost part(180), a second defrost part(190), and MICOM(150). The first and second room temperature detection sensors sense the room temperature. The first and second cooling driving units respectively cool the room. The first and second defrost parts respectively defrost the room. [Reference numerals] (110) First room temperature detection sensor; (120) Second room temperature detection sensor; (130) First defrost completion detection sensor; (140) Second defrost completion detection sensor; (160) First cooling driving unit - compressor, fan motor; (170) Second cooling driving unit - compressor, fan motor; (180) First defrost part - defrost heater, PVC heater; (190) Second defrost part - defrost heater, PVC heater

Description

Defrosting system of refrigerator and its defrosting method

The present invention relates to a defrosting system of a refrigerator, and more particularly, to a defrosting system and a defrosting method of a refrigerator having two cooling units in a room to perform a defrosting function without changing the temperature inside the room.

In general, home or commercial intercooled refrigerator (hereinafter, including a freezer) has a defrost function to remove the defrost generated in the evaporator of the freezer.

Conventionally, when performing this defrosting function, the high temperature heater is removed to remove defrost, so the temperature inside the room rises above 5 ℃. For example, when ice cream is frozen, it is different depending on the type. The problem is that the surface melts.

In order to compensate for this, when performing the defrosting function, the cooling temperature is lower than the set temperature first, and there is a case of compensating the rising temperature during the defrosting operation.

SUMMARY OF THE INVENTION The present invention is to overcome the above-mentioned conventional problems, and includes two cooling units in a room, and when the first cooling unit performs defrosting, the second cooling unit performs cooling, and the first cooling unit performs cooling. The second cooling unit has an object of providing a defrosting system and a method of defrosting the refrigerator capable of performing a defrost function to perform a defrost function without changing the temperature inside the room.

In order to achieve the above object, the present invention provides a defrosting system of a refrigerator using two cooling driving units, wherein the first cooling driving unit and the second cooling driving unit are operated while the first and second defrosting units are stopped. The room temperature is sensed by the average value of the first room temperature sensor and the second room temperature sensor to control the start and stop of the first and second cooling units. Stop, the first defrosting unit operation, the second cooling drive unit operation, the second defrosting unit is stopped, and the first defrosting completion sensor detects the temperature of the first cooling unit to determine the completion of the first defrosting, the defrosting completion In this case, when the first cooling drive unit operation, the first defrosting unit stop, the second cooling unit stop, the second defrosting completion sensor senses the temperature of the second cooling unit to determine the second defrosting completion, The first cold part is stopped and the first cold part is It characterized by driving the driving unit and the second cooling driver.

In addition, the present invention, in the refrigerator using one cooling drive unit having two evaporators and the refrigerant distribution valve, operating the cooling drive unit in a state in which the first defrost part and the second defrost part is stopped, the first room temperature sensing The room temperature is sensed by the average of the sensor and the second room temperature sensor to control the start and stop of the first and second cooling units. By operating the first defrosting unit, stopping the second defrosting unit, and detecting the temperature of the first cooling unit with the first defrosting completion sensor to determine the completion of the first defrosting, and when defrosting is completed, the refrigerant distribution Operate by switching the valve to the first evaporator, stop the first defrost part, operate the second defrost part, and detect the temperature of the second cooling part with the second defrost completion sensor to determine the completion of the second defrost, If it is determined that the first defrosting unit and the second defrosting unit And still, and to drive to open the refrigerant distribution valve to the first evaporator and the second evaporator to the other features.

According to the defrosting system and the defrosting method of the refrigerator according to the present invention configured as described above, when the first cooling unit performs defrosting, the second cooling unit performs cooling, and when the first cooling unit performs cooling, the second cooling unit By performing the defrost, there is an effect that can perform the defrost function without changing the temperature inside the room.

1 is a block diagram showing a defrosting system of a refrigerator according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a refrigeration cycle structure of a one-room two-compression two-evaporator applied to FIG. 1. FIG.
Figure 3 is a block diagram showing a defrosting system of a refrigerator according to another embodiment of the present invention.
4 is a block diagram showing a refrigeration cycle structure of a one-room one compression two-evaporator applied to FIG.
5 is a control flowchart illustrating a defrosting method of a refrigerator according to the present invention.
6 and 7 are graphs showing the temperature change of the freezer during conventional defrosting.
8 is a graph showing the temperature change of the freezer during defrosting of the present invention.

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

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and are based on the principle that the inventor may appropriately define the concept of terms in order to best describe the invention in the best way. As described, it should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention.

1 is a block diagram showing a defrosting system of a refrigerator according to an embodiment of the present invention, Figure 2 is a block diagram showing a refrigeration cycle structure of a 1 room 2 compressor 2 evaporator applied to FIG.

As shown, the present invention, the first room temperature sensor 110, the second room temperature sensor 120, the first defrost completion sensor 130, the second defrost completion sensor 140, the microcomputer ( 150), the first cooling driving unit 160, the second cooling driving unit 170, the first defrosting unit 180, and the second defrosting unit 190.

The first room temperature sensor 110 and the second room temperature sensor 120 detect the room temperature, respectively.

The first cooling driver 160 and the second cooling driver 170 cool the rooms, respectively.

At this time, during the cooling operation, each of the freezing driving unit is operated or stopped at the same time, or sequentially operated at intervals of 1 to 5 seconds.

To this end, each of the first cooling driving unit 160 and the second cooling driving unit 170, as shown in Figure 2, the compressor 20, 30, discharge pipe 21, 31, condenser 22 32), dryers 23 and 33, capillary tubes 24 and 34, evaporators 25 and 35, and suction pipes 26 and 36, respectively.

The first defrost part 180 and the second defrost part 190 defrost the deity of the room, respectively.

To this end, each of the first defrosting unit 180 and the second defrosting unit 190 includes a defrost heater (not shown).

The microcomputer 150 controls the operation of each unit.

In particular, by detecting the room temperature by the average value of the first room temperature sensor 110 and the second room temperature sensor 120 to control the start and stop of the first and second cooling units, the defrost time If it is determined that the first cooling driver 160, the first defrosting unit 180 operation, the second cooling driving unit 170 operation, the second defrosting unit 190 is stopped to perform the first defrosting operation.

In addition, when the first defrosting detection sensor senses the temperature of the first cooling unit and determines that the first defrosting is completed, the first cooling driver 160 operates, the first defroster 180 stops, and the second cooling driver 170. ) Stop and operate the second defrosting unit 190 to perform a second defrosting operation.

In addition, when it is determined that the second defrosting is completed by sensing the temperature of the second cooling unit with the second defrosting completion sensor, the first defrosting unit 180 and the second defrosting unit 190 are stopped and the first cooling driving unit 160 is stopped. ) And the second cooling driver 170 to perform a normal cooling operation.

Figure 3 is a block diagram showing a defrosting system of a refrigerator according to another embodiment of the present invention, Figure 4 is a block diagram showing a refrigeration cycle structure of a one-room one compressor 2 evaporator applied to FIG.

As shown in FIG. 3, the present invention includes a first room temperature sensor 210, a second room temperature sensor 220, a first defrost completion sensor 230, and a second defrost completion sensor 240. , The microcomputer 250, the refrigerant distribution valve 260, the cooling driving unit 270, the first defrosting unit 280, and the second defrosting unit 290.

The first room temperature sensor 210 and the second room temperature sensor 220 detect the room temperature, respectively.

The cooling drive unit 270 includes two evaporators 17 and 18 to cool the room.

The refrigerant distribution valve 260 selectively converts refrigerant into the two evaporators 17 and 18, respectively.

The first defrost part 280 and the second defrost part 290 defrost the deity of the room, respectively.

When it is determined that the defrosting time is determined by the operation of the microcomputer 250, the refrigerant distribution valve 260 is operated by switching to the second evaporator 18, and the first defrosting unit 280 is operated and the second defrosting unit 290 is operated. To stop. In addition, when the first defrosting completion sensor 130 senses the temperature of the first cooling unit and determines that the first defrosting is completed, the refrigerant distribution valve 260 is switched to the first evaporator 17 to operate. When the defrosting unit 280 is stopped and the second defrosting unit 290 is operated and the second defrosting detection sensor 140 senses the temperature of the second cooling unit to determine that the second defrosting is completed, the first defrosting unit ( 280 and the second defroster 290 are stopped and the refrigerant distribution valve 260 is opened and operated by the first evaporator 17 and the second evaporator 18.

As shown in FIG. 4, in the method of defrosting a refrigerator using one cooling driving unit having two evaporators and a refrigerant distribution valve, the first defrosting unit 280 and the second defrosting unit 290 may be used. The cooling driver 270 is operated in the stopped state.

Subsequently, when it is determined that the defrosting time is determined by the operation of the microcomputer 250, the refrigerant distribution valve 260 is switched to the second evaporator 18 to operate the first defrosting unit 280 and the second defrosting unit ( 290 is stopped.

Therefore, a refrigeration cycle composed of the compressor 10, the discharge pipe 11, the condenser 12, the dryer 13, the capillary tube 16, the evaporator 18, the suction pipe 19 is operated to perform a cooling operation. , The evaporator 17 on the other side is stopped, and the defrost heater of the first defrost part 280 is driven.

In addition, the first defrosting completion sensor 130 senses the temperature of the first cooling unit to determine the completion of the first defrosting, and when it is determined that the defrosting is completed, the refrigerant distribution valve 260 is switched to the first evaporator 17. And the first defroster 280 is stopped and the second defroster 290 is operated.

Therefore, a refrigeration cycle consisting of the compressor 10, the discharge pipe 11, the condenser 12, the dryer 13, the capillary 15, the evaporator 17, the suction pipe 19 is operated to perform a cooling operation. The evaporator 18 on the other side is stopped and the defrost heater of the second defrost part 290 is driven.

Thereafter, the second defrosting completion sensor 140 senses the temperature of the second cooling unit to determine the second defrosting completion, and when it is determined that the defrosting is completed, the first defrosting unit 280 and the second defrosting unit 290. Stop, and the refrigerant distribution valve 260 is opened to the first evaporator 17 and the second evaporator 18 to operate both normally.

5 is a control flowchart illustrating a defrosting method of a refrigerator according to the present invention.

As shown, the present invention is a first method of defrosting a refrigerator using two cooling drives, the first cooling unit 160 and the first defrosting unit 180 and the second defrosting unit 190 is stopped. The second cooling driving unit 170 is operated (S101).

When it is determined that the defrosting time is determined by the operation of the microcomputer, the first cooling driver 160 is stopped, the first defroster 180 is operated, the second cooling driver 170 is operated, and the second defroster 190 is stopped ( S103).

As shown in FIG. 2 according to the operation of the second cooling driver 170, the compressor 30, the discharge pipe 31, the condenser 32, the dryer 33, the capillary tube 34, and the evaporator 35. The refrigeration cycle composed of the suction pipes 36 is operated to perform the cooling operation, the first cooling driving unit 160 on the other side is stopped, and the defrost heater of the first defrosting unit 180 is operated.

Thereafter, the first defrosting completion sensor 130 senses the temperature of the first cooling unit to determine the first defrosting completion (S104).

When it is determined that the defrost is completed, the first cooling driver 160 is operated, the first defroster 180 is stopped, the second cooling driver 170 is stopped, and the second defroster 190 is operated (S105).

As shown in FIG. 2 as the first cooling driver 160 is driven, the compressor 20, the discharge pipe 21, the condenser 22, the dryer 23, the capillary tube 24, and the evaporator 20. The refrigeration cycle composed of the suction pipes 20 is operated to perform a cooling operation, the second cooling driving unit 170 of the other side is stopped, and the defrost heater of the second defrosting unit 190 is operated.

Thereafter, the second defrost completion sensor 140 senses the temperature of the second cooling unit to determine the second defrost completion (S106).

When it is determined that the defrost is completed, the first defrosting unit 180 and the second defrosting unit 190 are stopped and the first cooling driving unit 160 and the second cooling driving unit 170 are operated (S107).

6 and 7 are graphs showing the temperature change of the conventional freezer during defrosting, and FIG. 8 is a graph showing the temperature change of the freezer during defrosting of the present invention.

As shown in FIG. 6, there was a problem that the room temperature of the conventional defrosting is increased by about 9 ° C., and to solve this problem, when additional cooling is performed to compensate for the temperature rise during the operation of the defrosting heater, as shown in FIG. You can see the problem of low cooling.

Therefore, as shown in FIG. 8, the second cooling unit performs cooling when the first cooling unit performs defrosting, and the second cooling unit performs defrosting when the first cooling unit performs cooling. It can be seen that the defrosting function can be performed with little temperature change.

Configurations shown in the embodiments and drawings described herein are only the most preferred embodiments of the present invention and do not cover all of the technical idea of the invention, various equivalents and modifications that can be substituted for them at the time of application It should be understood that there may be

Therefore, the present invention is not limited to the above-described preferred embodiments, and those skilled in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims.

110: first room temperature sensor 120: second room temperature sensor
130: first defrost completion sensor 140: second defrost completion sensor
150: microcomputer 160: first cooling drive unit
170: second cooling driving unit 180: first defrosting unit
190: second defrosting unit 210: first room temperature sensor
220: second room temperature sensor 230: first defrost completion sensor
240: second defrost completion sensor 250: micom
260: refrigerant distribution valve 270: cooling drive unit
280: first defrosting unit 290: second defrosting unit

Claims (4)

In the defrosting system of a refrigerator using two cooling drives,
A first room temperature sensor 110 and a second room temperature sensor 120 respectively detecting room temperature;
A first cooling driver 160 and a second cooling driver 170 respectively cooling the room;
A first defrosting unit 180 and a second defrosting unit 190 respectively defrosting the deity of the room;
When it is determined that the defrosting time is determined by the operation of the microcomputer 250, the first cooling driver 160 is stopped, the first defroster 180 is operated, the second cooling driver 170 is operated, and the second defroster 190 is operated. Stop it,
When the first defrosting completion sensor 130 senses the temperature of the first cooling unit and determines that the first defrosting is completed, the first cooling driving unit 160 operates, the first defrosting unit 180 stops, and the second cooling driving unit ( 170) stop, drive the second defrost unit 190,
When the second defrosting completion sensor 140 determines that the temperature of the second cooling unit is the second defrosting completion, the first defrosting unit 180 and the second defrosting unit 190 are stopped and the first cooling driving unit 160 is stopped. And a microcomputer (150) for driving the second cooling driving unit (170). In the defrosting method of the refrigerator using two cooling drives,
Operating the first cooling driver 160 and the second cooling driver 170 in a state where the first defrosting unit 180 and the second defrosting unit 190 are stopped (S101);
Determining a defrosting time by an operation of the microcomputer 250 (S102);
When it is determined that the defrosting time, the step of stopping the first cooling driver 160, the operation of the first defrosting unit 180, the operation of the second cooling driving unit 170, the second defrosting unit 190 (S103);
Determining the first defrosting completion by sensing the temperature of the first cooling unit with the first defrosting completion sensor 130 (S104);
When it is determined that the defrost is completed, the step of driving the first cooling drive unit 160, the first defrosting unit 180, the second cooling driving unit 170, the second defrosting unit 190 (S105);
Determining a second defrost completion by sensing the temperature of the second cooling unit with the second defrost completion sensor 140 (S106); And
If it is determined that the defrost is completed, the step of stopping the first defrosting unit 180 and the second defrosting unit 190 and driving the first cooling driving unit 160 and the second cooling driving unit 170 (S107) Defrosting method of the refrigerator, characterized in that. In a defrosting system of a refrigerator using one cooling drive unit having two evaporators and a refrigerant distribution valve,
A first room temperature sensor 210 and a second room temperature sensor 220 for detecting a room temperature, respectively;
A cooling drive unit 270 including two evaporators 17 and 18 to cool the room;
A refrigerant distribution valve 260 for selectively switching refrigerants to the two evaporators 17 and 18 respectively;
A first defrost part 280 and a second defrost part 290 which respectively defrost the deity of the room;
When it is determined that the defrosting time is determined by the operation of the microcomputer 250, the refrigerant distribution valve 260 is operated by switching to the second evaporator 18, and the first defrosting unit 280 is operated and the second defrosting unit 290 is operated. To stop,
When the first defrosting completion sensor 130 senses the temperature of the first cooling unit and determines that the first defrosting is completed, the refrigerant distribution valve 260 is switched to the first evaporator 17 to operate. (280) stop, drive the second defrost unit 290,
When the second defrost completion sensor 140 senses the temperature of the second cooling unit and determines that the second defrost is completed, the first defrosting unit 280 and the second defrosting unit 290 are stopped and the refrigerant distribution valve ( 260 is a defrost system of the refrigerator, characterized in that it comprises a microcomputer (250) to operate by opening the first evaporator (17) and the second evaporator (18). In the defrosting method of a refrigerator using one cooling drive unit having two evaporators and a refrigerant distribution valve,
Operating the cooling driving unit 270 while the first defrosting unit 280 and the second defrosting unit 290 are stopped;
Determining a defrosting time by the operation of the microcomputer 250;
If it is determined that the defrosting time is performed, the refrigerant distribution valve 260 is switched to the second evaporator 18 to operate the first defroster 280 and the second defroster 290 is stopped;
Determining the first defrosting completion by sensing the temperature of the first cooling unit with the first defrosting completion sensor;
Determining that the defrosting is completed, operating the refrigerant distribution valve 260 by switching to the first evaporator 17, stopping the first defrosting unit 280, and operating the second defrosting unit 290;
Determining a second defrost completion by sensing a temperature of the second cooling unit with a second defrost completion sensor 140; And
When it is determined that the defrost is completed, the first defrosting unit 280 and the second defrosting unit 290 are stopped and the refrigerant distribution valve 260 is opened and operated by the first evaporator 17 and the second evaporator 18. Defrost method of a refrigerator comprising the step of.

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