KR0156682B1 - Defrosting control method of a refrigerator - Google Patents

Abstract

According to the present invention, in the conventional defrosting control method, when the defrosting progresses and the internal temperature rises slightly, the user opens the door, thereby increasing the internal temperature rising factor, thereby causing weak cooling and increasing power consumption. The refrigerator also detects the degree of opening of the refrigerator, thereby lowering the return point of the defrost sensor and controlling to start early defrost.

The present invention includes determining whether the defrost function is being performed during the normal operation of the refrigerator, comparing the anti-dog protection number with a reference index during the defrost function, and detecting the defrost sensor when the anti-dog protection number exceeds a predetermined reference index in the comparing step. It is a defrost control method of the refrigerator comprising the step of determining whether the temperature is 8 ℃ or more, and if the defrost sensor detection temperature is 8 ℃ or more in the above step is to terminate the defrost and the next time defrosting.

Description

Defrost Control Method of Refrigerator

1 is a schematic block diagram of hardware for implementing the defrost control method of the present invention.

2 is a flowchart of a first embodiment to which the defrost control method according to the present invention is applied.

3 is a flow chart related to another embodiment to which the defrosting control method according to the present invention is applied.

* Explanation of symbols for main parts of the drawings

10: sensor unit 11: door switch

12: outside temperature sensor 13: defrost sensor

20: sensor detection circuit 30: microcomputer

40: defrost heater driving circuit 50: defrost heater

60: compressor driving circuit 70: compressor

The present invention relates to a defrosting control method of a refrigerator, and more particularly, to a refrigerator defrosting control method for preventing the internal temperature from rising by opening the refrigerator door during the defrosting function of the refrigerator.

The general defrost control method is as follows.

In a conventional refrigerator, a freezer compartment temperature sensor and a refrigerator compartment temperature sensor for detecting internal temperatures of the freezer compartment and the refrigerating compartment, an outside air temperature sensor for detecting an indoor temperature where the refrigerator is installed, and a defrost sensor for detecting that the defrost is completed.

The temperature detection signal of each part of the refrigerator detected by each of these sensors is input to the refrigerator operation control microcomputer and used as information for the refrigerator operation control.

Defrost function control to remove frost formed around the cooler of the refrigerator to determine the defrost time and to turn on the defrost heater when the defrost time arrives, and to perform the defrost function, and through the defrost temperature sensor during the defrost function Determining whether the detected temperature reaches the defrosting return temperature; determining whether the defrosting end reference setting time has elapsed when the detected temperature reaches a predetermined defrosting return temperature; and setting the defrosting end criterion. After the elapse of time, the defrost heater is turned off to terminate the defrost function.

If the user opens the refrigerator door several times while the heater is operating during heating operation during the defrosting control of the refrigerator, the rate of increase of the internal temperature is higher than that of opening the door in other operating time periods not during the defrosting function. As a result, problems such as weak cold generation and increased power consumption occur.

Therefore, the present invention has been made to solve the problems of the prior art as described above, by detecting the number of open times and time during defrosting and accordingly by applying the defrost return point according to the high temperature inside the inlet air temperature when opening the refrigerator The purpose is to be able to prevent the rise.

In order to achieve the object of the present application, the present invention is a sensor unit including a door switch, an outside air temperature sensor and a defrost sensor, a sensor sensing circuit for processing and transmitting the sensor values, microcomputer, defrost heater, defrost heater driving society In a hardware configuration including a compressor and a compressor driving circuit, determining whether a defrost function is being performed during a normal operation of a refrigerator, comparing a dog prevent water with a reference index while performing a defrost function, and comparing the reference Determining that the detected temperature of the defrost sensor is more than a predetermined reference value (T _D ) if the opening of the door exceeds the reference, and if the detected temperature of the defrost sensor is more than the reference value (T _D ), the defrost is terminated and the refrigerator returns to normal operation. Before the next step to advance the next one defrost early to enter, and in the step of comparing the standard Doa opening standards Setting the reference value T _D by adjusting the defrost return temperature downward by a predetermined width at 10 ° C., determining whether the detected temperature of the defrost sensor is greater than or equal to the changed defrost return temperature T _D ; When the detected temperature of the defrost sensor is equal to or greater than the defrosting return temperature (T _D ) provides a refrigerator defrosting control method comprising the step of advancing early to the next one before the defrost is finished and before returning to the refrigerator normal operation.

The step of comparing with the reference value T _D before adjusting the defrosting return temperature at 10 ° C. prior to defrosting if the reference value T _D has already been exceeded through or before defrost heating. This is because the downward adjustment of temperature has no meaning.

Hereinafter, specific features and effects of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram illustrating a hardware configuration of a general refrigerator circuit to illustrate the present invention.

In FIG. 10, the door switch 11 detects the opening and closing of the refrigerator, the outdoor temperature sensor 12 for detecting the indoor temperature of the refrigerator, and the defrost sensor for detecting a defrosting completion point where the frost is almost removed when the defrost function is performed. A sensor unit comprising a 13, 20 is a sensor detection circuit for properly transferring the various data sensed through the plurality of sensors to a microcomputer to be described later, 30 is the normal operation control of the refrigerator and the defrost of the present invention The microcomputer in charge of control.

Also, reference numeral 80 denotes a defrost heater for performing a defrost heating operation, and 40 denotes a defrost heater driving circuit suitable for transferring a defrost heater driving control signal applied from the microcomputer 30 to the defrost heater 50.

70 is a compressor in charge of the cooling function, and 60 is a compressor driving circuit for suitably applying the compressor driving control signal applied from the microcomputer 30 to the compressor 70.

3 illustrates an embodiment for implementing the defrost control of the present invention in the hardware configuration as described above.

The microcomputer 30 determines whether defrost is in progress during normal operation of the refrigerator.

If it is determined that the refrigerator is performing defrosting function, the door opening prevention number is calculated based on the number of openings of the door and the opening time of the doors and then compared with the preset reference index.

If it is determined that the opening of the door is equal to or greater than the reference index through the comparison step, it is determined whether the temperature detected by the defrost sensor is equal to or greater than a predetermined reference value (eg, 8 ° C.).

If the defrost sensor temperature is detected above 8 ° C through the first defrost sensor detection step or the second defrost sensor detection step due to the continuous defrost heater operation, the defrosting time is completed and the next defrost point is advanced before returning to normal operation of the refrigerator. Get into early defrost.

FIG. 4 shows another embodiment of the present invention similar to that of FIG. 3, in which a step for comparing the watertightness preventing water described above with reference to FIG. 3 is more specifically realized.

In relation to FIG. 3, the outside temperature is determined before comparing the water stopper during the defrosting function of the refrigerator.

Through the embodiment of FIG. 3, the outside air temperature detection value is determined based on 30 ° C., and the defrost sensor temperature is adjusted downward based on 8 ° C.

If the outside air temperature is 30 ℃ or higher, the internal temperature rise rate is higher at the time of opening the lid. Therefore, the anti-dock protection number is compared with the first reference index, and if it is less than 30 ℃, the anti-dock protection number is compared with the second reference index.

In each of the above steps, in the comparison step of the anti-dog opening water, if the first reference index or the second reference index is exceeded, it is considered that there is a possibility of the internal temperature rising due to the opening of the door during defrosting, and it is determined whether the defrost sensor temperature is 8 ° C or higher. .

If the defrost sensor is below 8 ° C, the defrost sensor return point is set downward by changing from the normal 10 ° C to 8 ° C, and again it is determined whether the defrost sensor temperature is above 8 ° C.

When the defrost sensor detection temperature is determined to be 8 ° C. or higher through the first step of determining the defrost sensor temperature or the step of determining the defrost sensor temperature again, the defrost is completed and early defrosting is performed by advancing the next defrost time. .

As described above, according to the present invention, in the conventional defrosting control method, when the user opens the door at a time when the internal temperature is somewhat increased, the internal temperature rise factor is doubled, resulting in weak cooling and increased power consumption. There is a problem, it is an excellent invention that effectively solves the above problems by detecting the degree of opening of the refrigerator while the defrost function is performed, and accordingly by controlling the downturn of the defrost sensor return point and controlling the early defrost intrusion.

Claims (2)

Determining whether the defrost function is being performed during normal operation of the refrigerator; comparing the open-drip prevention number with a reference index during the defrosting function; and if the open-draft prevention number exceeds a predetermined reference index in the comparing step, the defrosting return temperature is determined by a predetermined reference value. ( _{D D} ) down-adjusting, determining whether the sensing temperature of the defrost sensor is greater than or equal to a predetermined reference value, and if the defrost sensor sensing temperature is greater than or equal to the reference value, defrosting is terminated and early defrosting is performed at the next defrosting. Defrost control method of the refrigerator comprising the step of performing. The method of claim 1, wherein the step of comparing the opening and closing prevention water to determine whether the outside air temperature is 30 ℃ or more, and comparing the opening and closing prevention water to the first reference index if the outside temperature is 30 ℃ or more, and the outside temperature is The defrosting control method of the refrigerator, characterized in that it comprises the step of comparing the anti-dripping water to the second reference index if less than 30 ℃.