KR19990017854A - How to control the low noise operation of the refrigerator - Google Patents

Abstract

The present invention relates to a low-noise operation control method of a refrigerator capable of performing quiet operation control at night by dividing day and night. When the detected illuminance is less than a standard illuminance, an appropriate reference temperature of a freezer compartment and a refrigerating compartment is measured. Controlling the operation by raising the predetermined temperature, and switching the defrost mode after a predetermined time elapses when switching to the defrost mode for removing frost attached to the evaporator during the control by raising the appropriate reference temperature of the freezer compartment and the refrigerating compartment. Including, in the refrigerator can reduce the haptic noise to a minimum by the normal operation rate and the defrost mode delay, especially at night, it is possible to reduce the power consumption.

Description

How to control the low noise operation of the refrigerator

The present invention relates to a low noise operation control method of a refrigerator, and more particularly, to a low noise operation control method of a refrigerator capable of performing quiet operation control at night by dividing day and night.

In general, a refrigeration cycle of a refrigerator includes a compressor that compresses and outputs a low-temperature, low-pressure gaseous refrigerant, and a condenser and a condenser that cools, condenses, and liquefies the high-temperature, high-pressure gaseous refrigerant from the compressor by external air. It is made through a capillary tube for depressurizing and outputting a high pressure liquid refrigerant from the capillary tube and an evaporator for absorbing and cooling heat by evaporating to a low temperature in a low pressure state. In particular, the fan-cooling refrigerator includes a fan for discharging cold air, and discharges cold air around the evaporator to the freezer compartment and the refrigerating compartment to cool the inside of the refrigerator, and performs temperature control as a driving / stop control of the fan and the compressor. do.

On the other hand, among such fan-cooling refrigerators, which convectively cool the air around the evaporator by a fan and control the temperature around the refrigerator compartment temperature, the refrigerator having one fan in the freezer compartment is detected in the refrigerator compartment. In order to liquefy a fan that discharges cold air around a temperature and a refrigerant in a gaseous state, a compressor is controlled to drive a low pressure low temperature refrigerant gas into a high pressure high temperature refrigerant gas to discharge cold air around the evaporator into a freezer compartment and a refrigerator compartment. Keep the temperature at the proper temperature.

In addition, the refrigerator that controls the temperature centering on the temperature of each of the freezer compartment and the refrigerating compartment independently drives and controls two fans for discharging cold air into the freezer compartment and the refrigerating compartment, and controls the compressor to control the cold air around the evaporator to the freezer compartment and the refrigerator compartment. By discharging, the temperature of the refrigerator is maintained at an appropriate temperature.

On the other hand, the noise caused by the operation of the refrigerator described above is mainly caused by the operation of the compressor, especially at night when the surroundings are relatively loud, the noise is relatively large, and if the driving of the compressor is unconditionally reduced to reduce such noise, There was a problem.

An object of the present invention is to provide a low noise operation control method of the refrigerator to determine the day and night in the refrigerator to perform the quiet operation control with minimal noise at night.

The low noise operation control method of the refrigerator according to the present invention is a method of operating the refrigerator with low noise in preparation for the night, and if the detected illuminance is less than the standard illuminance, the predetermined reference temperature of the freezer compartment and the refrigerating compartment is preset. And controlling the operation by raising the temperature, and switching the defrost mode after a predetermined time elapses when the defrosting mode for removing frost attached to the evaporator during control is raised by raising the appropriate reference temperature of the freezer compartment and the refrigerating compartment. Characterized in that made.

1 is a simplified block diagram of a refrigerator employed in accordance with a preferred embodiment of the present invention.

Figure 2 is a flow diagram illustrating a low noise operation control process of the refrigerator in accordance with a preferred embodiment of the present invention.

Explanation of symbols for main parts of the drawings

10, 20: first and second temperature detector 30: light detector

40: microcomputer 50, 70: first and second fan drive unit

60, 80: first and second fan 90: compressor drive unit

100 compressor 110 heater driving unit

120: defrost heater

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

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

1 is a schematic block diagram of a refrigerator according to a preferred embodiment of the present invention, wherein the first and second temperature detectors 10 and 20, the light detector 30, the microcomputer 40, and the first and second fan drivers ( 50, 70, first and second fans 60 and 80, a compressor driver 90, a compressor 100, a heater driver 110, and a defrost heater 120.

In this configuration, the first temperature detector 10 is installed at a predetermined position in the refrigerating compartment, detects the room temperature of the refrigerating compartment, and describes the detected refrigerating chamber temperature (generally, a DC value voltage value) of the microcomputer 40 described later. / D (Analog to Digital) port.

The second temperature detector 20 is installed at a predetermined position in the freezer compartment, detects the room temperature of the freezer compartment, and applies the detected freezer compartment temperature to the A / D port of the microcomputer 40.

In addition, the photodetector 30 is installed at a predetermined position outside the refrigerator to apply the detected external illuminance to the A / D port of the microcomputer 40 by detecting the illuminance around the refrigerator.

Meanwhile, when the external illuminance detected by the photodetector 30 is greater than the preset reference illuminance (for example, 200LUX), the microcomputer 40 performs the normal operation mode by performing the normal operation mode, that is, each A / D port. The first and second fans 60 and 80 which will be described later based on a comparison result between the detected refrigerator compartment temperature, which has been digitally converted, and the detected freezer compartment temperature, and the respective reference temperatures preset for maintaining an appropriate temperature of the refrigerator compartment and the freezer compartment. Drive control independently, and the compressor 100 typically controls the drive in dependence on the drive of the second fan 80 that blows cold air into the freezer compartment, and sets a predetermined defrost mode switching condition (for example, the compressor 80). ) When the driving rate is 80% or more and 6 hours or more), the compressor 100 is forcibly driven in the pre-cool mode for a predetermined time, and then the drive-on control of the defrost heater 120 is shown. Attached to the omitted evaporator Removes frost.

In addition, the microcomputer 40 recognizes nighttime when the external illuminance detected from the photodetector 30 is less than or equal to a predetermined reference illuminance (for example, 200LUX) and controls temperature control of the refrigerating compartment and the freezer compartment to operate the refrigerator at low noise. Each reference temperature is reset by increasing a predetermined temperature (for example, about 2 ° C.) to drive and control the first and second fans 60 and 80 and the compressor 100. For example, by switching to the defrost mode with a delay of about 6 hours), the compressor 100 is driven to the minimum to perform the quiet operation control.

The first fan driver 50 outputs a predetermined driving signal to the first fan 60 under the control of the microcomputer 40 using a driving element and a relay, and the first fan 60 is dedicated to the refrigerator compartment. The fan is driven based on a drive signal from the first fan driver 50 to discharge cold air around the evaporator (not shown) into the refrigerating chamber.

In addition, the second fan driver 70 outputs a predetermined driving signal to the second fan 80 under the control of the microcomputer 40 by using a driving element and a relay, and the second fan 80 is dedicated to the refrigerator compartment. The fan is driven on the basis of the drive signal from the second fan driver 70 to discharge cold air around the evaporator (not shown) into the freezer compartment.

On the other hand, the compressor driver 90 outputs a predetermined drive signal to the compressor 100 under the control of the microcomputer 40 using a drive element and a relay, and the compressor 100 is vaporized in the aforementioned refrigeration cycle. As a preliminary step for liquefying and reusing the 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.

The heater driver 110 outputs a predetermined driving signal to the defrost heater 120 under the control of the microcomputer 40, and the defrost heater 120 is a heater for removing frost attached to the evaporator. It is mounted on the basis of a drive signal from the heater driver 110 to remove and remove the frost attached to the evaporator.

Next, a low noise operation control process of the refrigerator in the refrigerator according to the preferred embodiment of the present invention including the above-described configuration will be described in detail with reference to the flowchart of FIG. 2.

First, the microcomputer 40 determines day and night in order to control the operation of the refrigerator at low noise at night in preparation for the surrounding environment, and the external illuminance around the refrigerator detected from the photodetector 30 is set to a predetermined reference illuminance ( For example, 200 LUX) or less (step 200).

At this time, if the detected external illuminance is greater than the reference illuminance, it is determined as the day and the drive is controlled to operate in the normal cloud mode (step 202).

In detail, when the refrigerator compartment temperature detected based on the first temperature detector 10 is equal to or lower than a predetermined refrigerator compartment lower limit temperature (eg, −1 ° C.), the first fan 60 is driven off and detected. If one refrigerator compartment temperature is higher than the predetermined refrigerator compartment appropriate upper limit temperature (for example, 0.65 degreeC), the normal control which drives on the 1st fan 60, and blows cold air around the evaporator which is not shown in figure to a refrigerator compartment is performed.

If the freezer compartment temperature detected based on the second temperature detector 20 is equal to or lower than the preset freezer compartment lower limit temperature (for example, -22.5 占 폚), the second fan 80 is driven off to detect the freezer compartment temperature. Is higher than a predetermined freezer proper upper limit temperature (for example, -17.5 ° C.), the second fan 80 is driven on to perform normal control to blow the cold air around the evaporator into the freezer compartment. Drive control is performed depending on driving on / off of the second fan 80.

On the other hand, if the external illuminance detected in the above-described step 200 is less than the reference illuminance (for example, 200LUX), it is recognized at night and the refrigerating chamber upper / lower limit temperature and the freezing chamber which are the driving criteria of the first and second fans 60 and 80. The upper limit / lower limit temperature is adjusted upward by a predetermined temperature (for example, 2 ° C.) to drive and control the first and second losses 60 and 80 and the compressor 100 (step 204), thereby increasing the operation rate of the compressor 100. Adjusts downward to perform low noise operation control.

Next, it is determined whether the defrost inrush condition is satisfied (step 206), and if the defrost inrush condition is not satisfied, the process proceeds to step 200 described above, and when the defrost inrush condition is reached, the noise caused by the defrost mode is minimized at night. After a predetermined time (for example, about 6 hours) has elapsed (step 208), the defrost mode is switched (step 210), and the noise caused by the defrost mode is delayed to a minimum at night to control the low noise operation of the refrigerator.

On the other hand, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the spirit of the present invention.

As described above, according to the present invention, it is possible to reduce the haptic noise to a minimum by the normal operation rate and the defrost mode delay, especially at night, and the power consumption can be reduced.

Claims (1)

A method of controlling operation of a refrigerator at low noise in preparation for a night, the method comprising: controlling an operation by raising an appropriate reference temperature of a freezer compartment and a refrigerating compartment by a predetermined temperature when the detected illuminance is less than the reference illuminance; A method for controlling low noise operation of a refrigerator comprising raising a predetermined reference temperature of a freezer compartment and a refrigerating compartment to a defrost mode for a defrosting mode for removing frost attached to an evaporator during control.