KR0154439B1 - Dehumidifying apparatus of a refrigerator - Google Patents

Abstract

The present invention relates to a dehumidifying apparatus and method for a refrigerator capable of removing indoor moisture when the internal temperature of the refrigerator is lower than a set temperature and the indoor humidity is high.

The present invention is a circulation passage for circulating the indoor air in the condensation period from the bottom auxiliary condenser of the refrigerator to the upper rear,

An outside air circulation fan that sucks indoor air and discharges sucked air in the lower portion of the circulation passage;

The rear surface of the refrigerator is configured to constitute an air outlet for communicating with the circulation passage to discharge the heat exchanged air.

Description

Refrigerator dehumidifier and method

1 is a longitudinal sectional view of a conventional refrigerator.

2 is a conventional refrigerator refrigerant cycle.

3 is a partial cutaway sectional view of the refrigerator of the present invention.

4 is a refrigerant cycle applied to the refrigerator of the present invention.

5 is a control block diagram of a dehumidifying apparatus of the present invention refrigerator.

6 is a flowchart illustrating a dehumidifying method of the refrigerator of the present invention.

* Explanation of symbols for main parts of the drawings

1: compressor 2,3: evaporator

4: capillary tube 5: evaporator

6: circulation passage 7: outdoor circulation fan

8: air outlet

The present invention relates to a dehumidifying apparatus and a method of a refrigerator, and more particularly, to a dehumidifying apparatus and a method for removing indoor humidity when a high internal temperature of the refrigerator is lower than a set temperature and the indoor humidity is high.

In the conventional refrigerator, as shown in FIGS. 1 and 2, the high-temperature and high-pressure refrigerant compressed from the compressor 1 passes through the subcondenser 2 and the condenser 3 to exchange heat with external air, thereby reducing the It becomes a liquid refrigerant, and the low temperature and high pressure liquid refrigerant becomes a low temperature and low pressure liquid through the capillary tube (4). The low temperature and low pressure liquid refrigerant passes through the evaporator (5) and absorbs hot air in the air. After the low temperature low-pressure gas refrigerant is circulated to flow into the compressor (1) is to cool the internal temperature of the refrigerator,

In the conventional refrigerator operating as described above, when the internal temperature of the refrigerator is lowered during the freezing and refrigerating operation, the refrigerator does not need to be refrigerated any more, and thus the compressor is stopped.

As such, when the humidity of the room is high or the rainy season in the state of stopping the compressor, frost on the evaporator of the refrigerator quickly forms due to the high humidity, which causes a decrease in cooling efficiency.

Therefore, an object of the present invention is to detect the indoor humidity when the internal temperature of the refrigerator is less than the set temperature, and when the detected humidity is more than the predetermined set humidity, the indoor air is sucked into the outside air circulation fan, the sucked indoor The air is exchanged with the subcondenser and the condenser to allow the dehumidified air to be discharged into the room, thereby to achieve indoor dehumidification.

In order to realize the above object, the apparatus of the present invention provides a circulation passage for circulating indoor air during the condensation period from the bottom auxiliary condenser of the refrigerator to the upper rear portion, and the lower portion of the circulation passage sucks indoor air and sucks inhaled air. The outside air circulation fan to be discharged,

The second half of the upper surface of the refrigerator is characterized in that the air outlet for discharging the heat exchanged with the circulation passage.

According to the method of the present invention for realizing the above object, the defrosting operation is determined by the defrosting operation during the refrigeration refrigeration operation, and if the defrosting operation is performed, the defrosting operation is performed. When the off time has elapsed, the refrigerator determines whether or not the internal temperature is above a predetermined set temperature.

An outdoor air humidity determination step of determining whether the outdoor air temperature is not higher than a predetermined set temperature, and whether the outdoor humidity is higher than a predetermined predetermined humidity;

When the outside air humidity is determined in the outside air humidity determination step or more than a predetermined set humidity, it is characterized in that the dehumidification operation step of driving the valve in the dehumidification operation, turn on the outside air circulation fan, driving the compressor to dehumidify the room.

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

3 is a partially cutaway side cross-sectional view of the refrigerator of the present invention,

A compressor 1, a subcondenser 2 and a condenser 3, which extend from the bottom of heat exchanger with ambient air to a predetermined position on the rear side of the refrigerator, are mounted on the bottom of the refrigerator. A circulation passage (6) for circulating indoor air between the condenser (4) extending from the bottom auxiliary condenser (2) of the refrigerator to the upper rear portion,

An outside air circulation fan 7 which sucks indoor air and discharges the sucked air in the lower portion of the circulation passage 6;

The rear of the upper surface of the refrigerator constitutes an air outlet 8 which communicates with the circulation passage 6 and discharges heat exchanged air.

In the drawing, reference numeral 9 denotes a defrosting water receiver.

4 is a refrigerant cycle of the refrigerator according to the present invention,

The high temperature and high pressure refrigerant compressed from the compressor (1) passes through the subcondenser (2) and the condenser (3) and exchanges heat with external air to form a low temperature and low pressure liquid refrigerant. The low temperature and low pressure liquid refrigerant passes through the evaporator 5 and becomes a low temperature low pressure gas refrigerant through the evaporator 5 and then flows into the compressor 1 through the evaporator 5. In the circulating refrigerant cycle,

A four-way valve (10) between the compressor (1) and the auxiliary condenser (2),

A four-way valve (11) to the auxiliary condenser (2) and the condenser (3),

A three-way valve 12 is formed between the capillary tube 4, the evaporator 5, and the four-way valve 10 so that the refrigerant from the compressor 1 passes through the four-way valve 10 during dehumidification. (2), four-way valve (11), condenser (3), carry tube (4), three-way valve (12), four-way valve (10), (11), cycle to come to compressor (1) It was formed.

5 is a control block diagram of a dehumidifier of the refrigerator of the present invention.

An on-board input unit for setting and inputting operation state signals for freezing, refrigerating, and high internal temperature of the refrigerator;

Door opening and closing detection unit (b) for detecting the opening and closing state of the door,

A freezer compartment temperature detecting unit (C) for detecting a freezer compartment temperature;

An indoor humidity detecting unit (D) for detecting the indoor humidity;

A microcomputer (e) for controlling the signal input by the sensing unit by a predetermined program and outputting the controlled signal;

A compressor driver (bar) driven by the output signal controlled by the microcomputer (e);

In the refrigerator consisting of a high air circulation unit (sa), a defrost heater driving unit (a), the evaporator temperature detection unit (child),

An outside air circulation fan driving unit (car) for driving the outside air circulation fan according to the control signal of the microcomputer (d) when the humidity detected by the indoor humidity detection unit is greater than a predetermined set humidity;

It consists of a valve drive part (ka) which controls a valve so that dehumidification operation is carried out by the control signal of the said microcomputer (e).

6 is a flowchart illustrating a dehumidifying method of the refrigerator of the present invention.

In the initialization step 600, if the defrost operation determination step 601 to determine whether the defrost operation is approved, and the defrost operation in the defrost operation determination step 601, turn off the high-temperature air circulation fan, count the defrost time, defrost It is determined whether the temperature of the evaporator is above the predetermined set temperature by turning on the heater, and if the temperature of the evaporator is higher than the predetermined set temperature, the defrosting operation step 602 of turning off the defrost heater and clearing the defrosting operation;

In the defrosting operation determining step 601, if the defrosting operation is not performed, the compressor off time determining step 603 is used to determine whether a predetermined time has elapsed.

In the compressor off time determining step 603, if the compressor off time does not pass a predetermined time, the load driving unit stop step (604) for turning off the compressor, high internal air circulation fan off, external air circulation fan off;

In the compressor off time determination step 603, if the compressor off time has elapsed a predetermined time, the internal temperature determination step 605 to determine whether the internal temperature is more than a predetermined set temperature;

In the high temperature determination step 605, if the high temperature is equal to or higher than a predetermined set temperature, the valve is switched to refrigeration and refrigeration, the air circulation fan is turned off, the compressor and the high temperature air circulation fan are driven, and the defrost tire is counted. A refrigeration and freezing operation step 606 for determining whether or not the predetermined count is equal to or greater than the predetermined count, and performing defrosting operation;

If the inside temperature is not above a predetermined set temperature in the inside temperature determination step 605, the outside air humidity determination step (607) to determine whether the outside air humidity is above a predetermined set humidity, and

In the outside air humidity determination step 607, if the outside air humidity is not more than a predetermined set humidity, the load driving stop step 604 is performed, and if the outside air humidity is more than the predetermined set humidity, the valve is driven by dehumidification operation, The high internal air circulation fan is turned off, the external air circulation fan is turned on, and a dehumidifying operation step 608 is performed to drive the compressor to indoor dehumidification.

Referring to the effects of the present invention configured as described above are as follows.

First, when power is supplied to the refrigerator, the microcomputer (e) of the refrigerator goes to the initialization step 600 and receives a signal for refrigeration and freezing operation of the refrigerator from the operation input unit (A) and is controlled and controlled by a predetermined program. The signal is output to the compressor driving unit (bar) and the high internal air circulation fan driving unit (G) to drive the compressor and the high internal air circulation fan to freeze and refrigerate the refrigerator in a set operation state, and when the defrosting time arrives during the freezer operation. Defrost heater driving unit (a) to control the defrost operation while the defrost operation bar,

That is, as described above, during the refrigeration operation of the refrigerator, the microcomputer (e) goes to the defrosting operation determining step 601 to determine whether the defrosting operation is present. At this time, the microcomputer (e) determines the compressor off time. In step 603, it is determined whether the predetermined time has elapsed since the compressor is turned off. At this time, if the predetermined time has elapsed since the compressor is turned off, the microcomputer (e) goes to the internal temperature determination step 605 of the freezer compartment temperature sensing unit ( B) control the temperature sensor to detect the inside temperature, and it is determined whether the detected inside temperature is above a predetermined set temperature. At this time, if the detected inside temperature is above the predetermined temperature, the inside temperature of the refrigerator is determined. In order to cool the microcomputer (e), go to the refrigeration and freezing operation step 606 to control the valve driving unit (ka) to the four-way valve 10 in the refrigerant cycle of FIG. (11), the three-way valve 12 is switched to the refrigeration operation, and then the microcomputer (e) controls the external circulation fan drive unit (car) to turn off the external circulation fan, the compressor drive unit (bar) and the interior By controlling the air circulation fan driving unit (4) to drive the compressor and the high-temperature air circulation fan, the high-temperature, high-pressure gas refrigerant from the compressor through the four-way valve 10, the auxiliary condenser (2), four-way valve (11) And heat exchange with external air while passing through the condenser (3) to form a liquid refrigerant of low temperature and high pressure. The liquid refrigerant of low temperature and high pressure becomes a liquid of low temperature and low pressure through the capillary tube (4). After passing through the evaporator (5) and the heat exchange action to absorb the hot air in the high-temperature low-pressure gas refrigerant after the circulating process introduced into the compressor (1) to cool the elevated internal temperature, as described above City reminder In the comb, the defrosting timer is driven to count the defrosting time. At this time, the refrigeration operation is repeatedly performed until the defrosting time arrives while determining whether the counting time of the defrosting timer reaches a predetermined defrosting time. When the defrost time arrives, the microcomputer (e) is switched to the defrosting operation state, and in the microcomputer (e), the defrosting operation decision step 601 is followed by the defrosting operation step 602, and the air inside the high air for frost defrosting on the evaporator. By controlling the circulation fan drive unit (4) to stop the operation of the high-temperature air circulation fan, clear the defrost time counted by the defrost timer, control the defrost heater driving unit (h) to operate the defrost heater to generate heat of the defrost heater The frost on the evaporator is defrosted, and the microcomputer (e) senses the temperature of the evaporator being defrosted and the detected temperature. Is determined to be equal to or greater than a predetermined temperature, and if the temperature of the evaporator is not equal to or greater than a predetermined temperature, the microcomputer (e) goes to the compressor off time determining step 603 to determine whether the predetermined time has elapsed since the compressor is turned off. At this time, if the compressor off time has not elapsed for a predetermined time, the microcomputer (e) goes to the load driving unit stop step 604 to control the compressor driving unit (bar) to turn off the compressor and control the high air circulation fan driving unit (g). By turning off the high internal air circulation fan, controlling the external air circulation fan driving unit (car) to turn off the external air circulation fan, and continuing the defrosting operation until the temperature of the evaporator becomes a predetermined temperature or more, and then the temperature of the evaporator. When the temperature exceeds a predetermined temperature, the microcomputer (e) determines that the frost of the evaporator has been defrosted and controls the defrost heater driving unit (h) to defrost. The heater is turned off and the defrosting operation time is cleared.

When the defrost is completed as described above, the microcomputer (e) goes back to the compressor off time determining step 603 to determine whether the compressor is turned off or a predetermined time has elapsed. E) Go to the internal temperature determination step 605 to determine whether the internal temperature is above a predetermined set temperature.

At this time, if the internal temperature is higher than a predetermined set temperature, go to the refrigeration operation step 606 to control the valve driving unit (ka) to cool the elevated internal temperature to the four-way valve 10 in the refrigerant cycle of FIG. (11), the three-way valve 12 is switched to the refrigeration operation, and then the microcomputer (e) controls the external circulation fan drive unit (car) to turn off the external circulation fan, the compressor drive unit (bar) and the interior By controlling the air circulation fan driving unit (4) to drive the compressor and the high-temperature air circulation fan, the high-temperature, high-pressure gas refrigerant from the compressor through the four-way valve 10, the auxiliary condenser (2), four-way valve (11) And heat exchange with external air while passing through the condenser (3) to form a liquid refrigerant of low temperature and high pressure. The liquid refrigerant of low temperature and high pressure becomes a liquid of low temperature and low pressure through the capillary tube (4). Passing through the evaporator (5) As a heat exchange action to absorb hot air in the high temperature, the low temperature and low pressure gas refrigerant is cooled, and the elevated internal temperature is cooled by the circulation process flowing into the compressor (1). The defrosting time is counted by driving the defrosting timer. At this time, the refrigeration and cooling operation is repeatedly performed until the defrosting time arrives while determining whether the counting time of the defrosting timer reaches a predetermined defrosting time. As a result of the determination in step 605, if the inside temperature is not higher than a predetermined set temperature, the microcomputer (e) goes to the outside air humidity determination step 607 and detects the outside air humidity through the outside air humidity detecting unit (d). It is determined whether humidity is above a predetermined set humidity, and if the detected humidity is not above a predetermined set temperature, the microcomputer (e) In order to maintain the freezing and refrigerating temperatures while turning off the compressor, the high air circulation fan, and the outdoor air circulation fan, the microcomputer (commercial determination) indicates that the detected humidity is above a predetermined set temperature. E) go to the dehumidification operation step 608 to dehumidify the room. When describing this process, the microcomputer (E) controls the valve driving unit (K) to control the four-way valve 10 in the refrigerant cycle of FIG. (11), the three-way valve 12 is switched from the refrigeration operation to the dehumidification operation, and then the microcomputer (e) controls the high air circulation fan drive unit (G) to turn off the high air circulation fan, while circulating outside air. When the fan drive unit (car) is driven to drive the outside air circulation fan, and the compressor drive unit (bar) is driven to drive the compressor to compress the refrigerant cycle at high temperature and high pressure. Valve 10, auxiliary condenser (2), 4-way valve (11), condenser (3), capillary tube (4), 3-way valve (12), 4-way valve (10), 4-way valve (11) Since the refrigerant arrives through the compressor 1 through the circulation passage 6 from the bottom of the refrigerator to the top of the rear surface, the moisture-containing air sucked by the outside air circulation fan 7 is transferred to the auxiliary condenser 2. And the heat exchanged through the condenser (3) to remove moisture, the air is discharged to the room through the air outlet (8) to perform a dehumidification function to remove the indoor moisture, wherein the water generated by the dehumidification action is a refrigerator The defrosting receiver 9 is mounted on the bottom of the receiver.

As described above, the present invention, when the refrigerator detects the humidity of the room during the refrigeration and the room humidity is higher than the predetermined set humidity, the microcomputer inhales the refrigerant from the compressor to the auxiliary condenser and condenser and sucks it into the outside air circulation fan By heat-exchanging the indoor air, the air from which moisture is removed is discharged to the room, thereby providing an effect of dehumidifying the indoor air.

Claims (2)

On the bottom of the refrigerator, a compressor 1, an auxiliary condenser 2 and a condenser 3, which extend from the bottom of heat exchanger with the surrounding air to a predetermined position on the rear side, are mounted. From the bottom auxiliary condenser 2 of the refrigerator, A circulation passage 6 through which the indoor air is circulated between the condenser 4 reaching the upper rear side, and an outside air circulation fan 7 through which the indoor air is sucked and the sucked air is discharged in the lower portion of the circulation passage 6; And an air discharge port (8) configured to communicate with the circulation passage (6) to discharge heat exchanged in the rear of the upper surface of the refrigerator. During the refrigeration operation, it is determined whether the defrosting operation is a defrosting operation. If it is a defrosting operation, the defrosting operation is performed. The refrigerator is configured to perform the refrigeration operation when the internal temperature is higher than the predetermined temperature, and the internal air humidity is not higher than the predetermined temperature. Dehumidification operation of the outside air humidity determination step 607 and the outside air humidity determination step 607 if the outside air humidity is more than a predetermined set humidity, the valve is switched to the dehumidification operation, the dehumidification operation to drive the air circulation fan and the compressor to dehumidify the room Dehumidifying method of the refrigerator characterized in that the step 608 is made.