KR20000034722A - Method for controlling fan of refrigerating cavity - Google Patents

Abstract

PURPOSE: A method for controlling the fan of a refrigerating cavity is provided to improve the cooling efficiency of the refrigerating cavity by controlling the temperature by operating a compressor in case of the temperature of the refrigerating cavity under a defrosting temperature. CONSTITUTION: When a fan of a refrigerating cavity is in an off state, the temperature of the refrigerating cavity detected by a refrigerating cavity sensor is checked for deciding if the temperature is an operating on point. If the temperature is the operating on point, the temperature is checked for deciding if the temperature is under a defrosting temperature. When the temperature is under the defrosting temperature, the defrosting mode of the refrigerating cavity is decided. When the refrigerating cavity is not in the defrosting mode, a compressor is operated for performing a cooling first control, which drives a refrigerator while considering the temperature of the refrigerating cavity. If the fan of the refrigerating cavity is in an off state, the temperature of the refrigerating cavity is checked for deciding if the temperature is an operating off point. If the temperature is the operating off point, the refrigerating cavity is checked for deciding if the refrigerating cavity is in the cooling first control. If the refrigerating cavity is in the cooling first control, the compressor is turned off for deleting the cooling first control.

Description

How to control your fridge fan.

The present invention relates to a refrigerating compartment fan control method, and more particularly, to a refrigerating compartment fan control method for improving the cooling efficiency of a refrigerating compartment by performing a temperature control by driving a compressor when the refrigerating compartment temperature is less than the defrost temperature.

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, the R fan is driven on / off according to the driving on / off condition of the refrigerator compartment sensor.

However, such a refrigerator may cause a problem that the temperature of the cold air discharged to the refrigerating compartment becomes higher than the inside of the refrigerating compartment by driving on / off the refrigerating compartment fan according to the driving on / off condition of the refrigerating compartment sensor regardless of the temperature of the evaporator.

In addition, there is a problem that the temperature of the evaporator is sharply increased when the overload is added, the discharge temperature in the refrigerator compartment is increased.

The present invention has been made to solve the above problems, to provide a refrigerating chamber fan control method to improve the cooling efficiency of the refrigerating compartment by performing a temperature control by driving the compressor when the refrigerating compartment temperature is less than the defrost temperature. .

The refrigerator control method of the present invention comprises the steps of: determining whether the refrigerator fan drive on / off of the refrigerator; Determining whether the refrigerating compartment temperature detected by the refrigerating compartment sensor is the drive-on point when the refrigerating compartment fan is in the drive-off state, and determining whether the refrigerating compartment temperature sensed by the refrigerating compartment sensor is below the defrost temperature sensed by the defrost sensor when the refrigerating compartment fan is driven off; Determining whether the refrigerator is being defrosted when the refrigerator compartment temperature is lower than the defrost temperature; When the refrigerator is not in defrost, driving the compressor to start the refrigerator-first control for driving the refrigerator around the refrigerator compartment temperature; Determining whether the refrigerator compartment temperature detected by the refrigerator compartment sensor is the driving off point when the refrigerator compartment fan is in the driving-on state, and determining whether the refrigerator priority control is being performed when the refrigerator compartment fan is the driving off point; Turning off the compressor and deleting the refrigeration priority control when it is under refrigeration priority control.

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 illustrating a control process of a refrigerating unit fan control method according to an exemplary embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

10 ... first temperature detector 20 ... second temperature detector

30.Microcomputer 40 ... Fan drive

50 ... R fan 60 ... compressor drive

70 ... compressor

The refrigerator compartment fan control method of the present invention for achieving the above object comprises the steps of determining whether the refrigerator compartment fan drive on / off of the refrigerator; Determining whether the refrigerating compartment temperature detected by the refrigerating compartment sensor is the drive-on point when the refrigerating compartment fan is in the drive-off state, and determining whether the refrigerating compartment temperature sensed by the refrigerating compartment sensor is below the defrost temperature sensed by the defrost sensor when the refrigerating compartment fan is driven off; Determining whether the refrigerator is being defrosted when the refrigerator compartment temperature is lower than the defrost temperature; When the refrigerator is not in defrost, driving the compressor to start the refrigerator-first control for driving the refrigerator around the refrigerator compartment temperature; Determining whether the refrigerator compartment temperature detected by the refrigerator compartment sensor is the driving off point when the refrigerator compartment fan is in the driving-on state, and determining whether the refrigerator priority control is being performed when the refrigerator compartment fan is the driving off point; And when the refrigeration priority control is in progress, turning off the compressor and deleting the refrigeration priority control.

According to the above-described feature of the present invention, the refrigerator compartment fan control method of the present invention can improve the cooling efficiency of the refrigerator compartment by performing a temperature control by driving a compressor when the refrigerator compartment temperature is below the defrost temperature.

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 first temperature detector 10, the second temperature detector 20, the microcomputer 30, the fan drive unit 40, the R fan 50, Compressor drive unit 60, compressor 70 is included.

In this configuration, the first temperature detection unit 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 refrigerating compartment temperature detection signal to A / D (Analog to Digital) port.

The second temperature detector 20 applies the defrost temperature detected by the D-sensor 30 (generally, a DC level voltage value) to an A / D (Analog to Digital) port of the microcomputer 30 described later. .

On the other hand, the microcomputer 30 drives the compressor when the temperature of the refrigerator compartment detected based on the temperature detection signal applied from the first temperature detector 10 and the second temperature detector 20 through the A / D port is lower than the defrost temperature. Refrigeration first control.

The fan driver 40 outputs a predetermined drive signal to the R fan 50 under the control of the microcomputer 30 using a drive element and a relay, and the R fan 50 is driven from the fan driver 40. 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 60 outputs a predetermined drive signal to the compressor 70 under the control of the microcomputer 30 using a drive element, a relay, or the like, and the compressor 70 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 first temperature detector for detecting the temperature of the refrigerator compartment and the second temperature detector for detecting the defrost temperature detect the refrigerator compartment and the defrost temperature, respectively, and output the refrigerator compartment temperature detection signal and the defrost temperature detection signal (generally, the DC level voltage value). It is applied to the microcomputer's A / D port.

Next, the microcomputer determines whether the refrigerator compartment fan is in the driving-on state (step 100). If the refrigerator is in the driving-off state, the microcomputer determines whether the refrigerator compartment temperature detected by the refrigerator compartment sensor is the driving-on point.

Subsequently, when the refrigerating compartment temperature is the driving on point, it is determined whether the refrigerating compartment temperature sensed by the first temperature detector is equal to or greater than the defrost temperature sensed by the second temperature detector (step 120).

If the refrigerator compartment temperature is above the defrost temperature, the refrigerator compartment fan is driven (step 130).

If the refrigerator compartment temperature is lower than the defrost temperature, it is determined whether defrosting is in progress (step 140).

If the refrigerator is not in defrost, the refrigerator is driven to perform a refrigerator priority control to control the temperature of the refrigerator compartment temperature center (step 150).

On the other hand, when the refrigerator compartment fan is in the driving-on state, it is determined whether the refrigerator compartment temperature sensed by the first temperature detector is the driving off point.

Next, if it is the drive-off point, it is determined whether refrigeration priority control is being performed (step 170).

If the refrigerator is not in the refrigerator-first control, the refrigerator compartment fan is turned off (step 180).

When the refrigeration priority control is being performed, the compressor is turned off and the refrigeration priority control is deleted (step 190).

During defrosting of the refrigerator (HTR ON), the R fan is controlled until the defrost temperature is equal to or higher than the refrigerating chamber temperature.

Then, when the compressor is driven after the rest period, the refrigerator compartment temperature is above the defrost temperature to control the R fan.

When the overload is applied during normal operation of the refrigerator, when the defrost temperature is higher than the temperature of the refrigerator compartment, the compressor is driven by the refrigerator compartment sensor.

When the refrigerating chamber temperature becomes the off point, normal operation is performed.

As described above, according to the present invention, when the refrigerator compartment temperature is lower than the defrost temperature, the compressor is driven to perform temperature control, thereby effectively controlling the temperature of the refrigerator compartment by discharging cold air having a lower temperature than the inside of the refrigerator compartment into the refrigerator compartment.

In addition, the temperature of the evaporator is sharply increased when the overload is applied, and thus the discharge temperature in the refrigerating chamber is prevented from increasing, and power consumption can be reduced.

Claims (1)

Determining whether the refrigerator compartment fan is turned on or off; Determining whether the refrigerator compartment temperature detected by the refrigerator compartment sensor is the drive-on point when the refrigerator compartment fan is in the driving-off state, and determining whether the refrigerator compartment temperature detected by the refrigerator compartment sensor is lower than the defrost temperature detected by the defrost sensor when the refrigerator compartment fan is in the driving-off state; , Determining whether the refrigerator is being defrosted when the refrigerator compartment temperature is lower than a defrost temperature; When the refrigerator is not in defrost, driving a compressor to start a refrigerator-first control for driving the refrigerator around a refrigerator compartment temperature; Determining whether the refrigerator compartment temperature detected by the refrigerator compartment sensor is a driving off point when the refrigerator compartment fan is in a driving-on state, and determining whether the refrigerator priority control is being performed when the refrigerator compartment temperature is a driving off point; And refrigerating the compressor and deleting the refrigeration priority control when the refrigeration priority control is in progress.