KR20000034721A - Method for controlling fan in refrigerating chamber - Google Patents

Abstract

PURPOSE: A controlling method of a fan in a refrigerating chamber is provided to improve cooling speed of a refrigerating chamber by resetting a driving on/off point of a refrigerating chamber sensor at initial operation of a refrigerator or when inputting overload. CONSTITUTION: A temperature sensed in a temperature sensor of a refrigerating chamber is decided to be a certain weak cooling sensing point or not. If the temperature is over the weak cooling sensing point, the driving on/off point is reset and operation is performed by high speed cooling mode. If the temperature is under the weak cooling sensing point, an R fan is decided to be driving or not. If the R fan is not driving, the on point of an R sensor is decided. If the point is driving on, the R fan is driven. If the R fan is driving, the driving off point of the R sensor is decided. If the point is driving off, the driving of the R fan is turned off. If the temperature is over 6°C, the refrigerating chamber starts to be operated by high speed cooling mode.

Description

How to control your fridge fan.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating compartment fan control method, and more particularly, to a refrigerating compartment fan control method for resetting a driving on / off point of a refrigerating compartment sensor at an initial startup of an refrigerator or when an overload is applied.

Generally, a refrigerator is a household appliance used to freeze and refrigerate food by using a cooling cycle. The refrigerator exchanges refrigerant gas, which has been compressed at high and high pressure in a compressor, to the outside air in a condenser. After liquefied by filtration in the receiver dryer (Receiver dryer), through the capillary tube (Capillary Tube) is adiabatic expansion with low-temperature, low-pressure liquid refrigerant.

In particular, a fan-cooling refrigerator exchanges heat with cavity air in a cabinet circulated by a fan in an evaporator to freeze and refrigerate food stored by evaporative heat of refrigerant absorbed. Temperature control is performed as the drive / stop control of the fan and the compressor.

On the other hand, among such fan-cooling refrigerators in which cold air around an evaporator is forced to convectively by a fan and cooled, a refrigerator having a temperature control centered on a refrigerator compartment temperature has one fan in a freezer compartment. A fan for discharging cold air around the detected temperature and a compressor for converting a low pressure low temperature refrigerant gas into a high pressure high temperature refrigerant gas in order to liquefy a gaseous refrigerant, thereby controlling the cold air around the evaporator in the freezer compartment and the refrigerator compartment The temperature of the refrigerator is maintained at an appropriate temperature.

In detail, if the detected refrigerator compartment temperature is higher than or equal to a predetermined upper limit temperature, the fan and the compressor are driven on and controlled. If the detected refrigerator compartment temperature is lower than or equal to the preset lower limit temperature, the fan and the compressor are controlled to be driven off to control the refrigerator and the freezer compartment. Perform temperature control.

Therefore, when the temperature detected by the refrigerating compartment temperature sensor at the time of injecting the overload into the refrigerator is weakly detected, that is, 6 ° C. or more, the compressor is forcibly driven and the compressor is turned off at the refrigerating compartment temperature sensor off point.

However, the control method of the refrigerator has a problem that the cooling efficiency is lowered and the power consumption is increased because the load is cooled slowly.

The present invention was created in order to solve the above problems, a refrigerator control method for refrigerating compartment to improve the cooling rate of the refrigerating compartment by resetting the drive on / off point of the refrigerating compartment sensor during the initial startup or overloading of the refrigerator. To provide.

The refrigerator control method of the present invention comprises the steps of: determining whether a temperature detected by a refrigerating compartment temperature sensor detecting a refrigerating compartment temperature is above a predetermined weak cooling detection point; If the refrigerating compartment temperature is more than the predetermined weak cooling detection point is made by the step of resetting the drive on / off point of the refrigerating compartment temperature sensor comprises a high-speed cooling operation.

1 is a block diagram of a refrigerator compartment control method employed in accordance with a preferred embodiment of the present invention;

2 is a flowchart for explaining the present invention;

3 is a drive on / off point change pattern table and graph of a refrigerator compartment sensor.

<Explanation of symbols for main parts of the drawings>

10 ... fridge temperature sensor 20 ... microcomputer

30 ... fan drive 40 ... R fan

50 ... compressor drive 60 ... compressor

The refrigerator compartment fan control method of the present invention for achieving the above object comprises the steps of determining whether the temperature detected by the refrigerator compartment temperature sensor for detecting the refrigerator compartment temperature is more than a predetermined weak cooling detection point; When the refrigerator compartment temperature is more than the predetermined weak cooling detection point, the step of resetting the drive on / off point of the refrigerator compartment temperature sensor characterized in that it comprises a high-speed cooling operation.

According to the above-described feature of the present invention, the refrigerating compartment fan control method of the present invention can improve the cooling rate of the refrigerating compartment by resetting the driving on / off point of the refrigerating compartment sensor when the refrigerator is initially started or when an overload is applied.

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

1 is a block diagram of a refrigerator control method according to the present invention, the refrigerator compartment temperature sensor 10, the microcomputer 20, the fan drive unit 30, F fan 40, compressor drive unit 50, compressor 60 ).

In such a configuration, the refrigerating compartment temperature sensor (10) is installed at a predetermined position in the refrigerating compartment and detects the room temperature of the refrigerating compartment by the R sensor to return the temperature detection signal (A / D (Analog to Digital) of the microcomputer 20). Apply to the port.

The microcomputer 20 controls the R fan 40 based on a temperature detection signal applied from the refrigerating chamber temperature sensor 10 through the A / D port.

When the refrigerator compartment temperature detected by the refrigerator compartment temperature sensor 10 is 6 ° C. or less, it is determined whether the refrigerator compartment fan 40 is driven and the refrigerator compartment fan 40 is driven when the driving temperature is at a driving point, and when the refrigerator compartment temperature is driven off, the refrigerator compartment fan 40 is operated. Outputs a control signal to turn off.

In addition, when the refrigerating chamber temperature is a weak cooling detection point, that is, 6 ° C. or more, the refrigerating chamber high temperature cooling mode is entered and the refrigerating chamber temperature control is performed according to the refrigerating compartment driving on / off point.

The fan driver 30 outputs a predetermined drive signal to the R fan 40 under the control of the microcomputer 20 using a drive element, a relay, and the like, and the R fan 40 is driven from the fan driver 30. Driven on the basis of the drive signal of to discharge the cold air around the evaporator (not shown) to the freezer compartment and the refrigerating compartment.

In addition, the compressor driver 50 outputs a predetermined drive signal to the compressor 60 under the control of the microcomputer 20 using a driving element, a relay, and the like, and the compressor 60 is vaporized in the aforementioned refrigeration cycle. As a preliminary step for liquefying and reusing the used refrigerant, the refrigerant gas of low temperature and low pressure from the evaporator, not shown, is compressed and converted into a refrigerant gas of high temperature and high pressure, and outputted to a condenser, not shown.

Next, the refrigerator compartment fan control process according to the preferred embodiment of the present invention including the aforementioned components will be described in detail with reference to the flowchart of FIG. 2.

First, the refrigerating compartment temperature sensor detecting the temperature of the refrigerating compartment detects the temperature of the refrigerating compartment and applies a refrigerating compartment temperature detection signal (generally, a DC level voltage value) to the A / D port of the microcomputer.

Next, the microcomputer determines whether the temperature of the refrigerating compartment is a weak cooling detection point, that is, 6 ° C. or more (step 100).

Subsequently, if the R fan is not in the driving state, it is determined whether the R sensor is driven on (step 300), and if the R fan is driven, the R fan is driven.

When the R fan is in the driving state, it is determined whether it is the R sensor driving off point (step 500). If the R fan is the driving off point, the R fan is driven off.

On the other hand, if the temperature detected by the refrigerator compartment temperature sensor is 6 ℃ phase enters the refrigerator compartment fast cooling mode (step 700).

When entering the refrigerating compartment high speed cooling mode, the temperature of the refrigerating compartment is controlled by resetting the driving on / off point of the R sensor.

Therefore, when the refrigerator compartment temperature detected by the refrigerator compartment sensor at the initial start-up or during normal control is 6 ° C, that is, a weakly cold detection point, the refrigerator enters the high-speed cooling mode and controls the temperature of the refrigerator compartment according to the newly set refrigerator compartment sensor on / off point pattern. do.

The drive on / off point change pattern table of the refrigerator compartment sensor is as shown in FIG.

Therefore, the load cooling rate of the refrigerating chamber can be improved.

As described above, according to the present invention, the temperature control is performed by resetting the driving on / off point of the refrigerating compartment sensor during the initial startup of the refrigerator or the overloading, thereby improving the cooling rate of the refrigerating compartment and at the same time keeping the food fresh. .

Claims (1)

Determining whether the temperature detected by the refrigerating compartment temperature sensor that detects a refrigerating compartment temperature is greater than or equal to a predetermined weak cooling detection point; And refrigerating and resetting the driving on / off point of the refrigerating compartment temperature sensor when the refrigerating compartment temperature is greater than or equal to a predetermined weak cooling detection point.