KR19990013161A - How to control fast freezing of refrigerators - Google Patents

Abstract

The present invention relates to a method for controlling rapid freezing of a refrigerator, and includes a fan for discharging cold air into a freezing compartment and a refrigerating compartment, and a compressor for converting refrigerant gas of low temperature and low pressure into refrigerant gas of high temperature and high pressure to pressurize the refrigerant circulation. In a refrigerator having a temperature control lever of a freezer compartment connected to a mechanical damper, a method of performing rapid freezing while controlling the temperature of the refrigerator based on the temperature of the refrigerator compartment, wherein the compressor and the fan are driven when the freezer temperature control lever is adjusted to the freezing steel. Switching to the rapid freezing mode, and when the detected temperature of the refrigerating compartment is lowered below the preset reference temperature for the rapid freezing of the freezer or after the predetermined reference time has elapsed for the rapid freezing, the rapid freezing mode is released and the normal operation mode is performed. Freezing the rapid freezer, including the step of switching to It can be done.

Description

How to control fast freezing of refrigerators

The present invention relates to a method for controlling a temperature of a refrigerator, and more particularly, to a method for controlling rapid freezing of a refrigerator in a refrigerator having a freezing compartment and a refrigerating compartment and controlling a temperature of the refrigerator based on the temperature of the refrigerating compartment. .

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 the high pressure liquid refrigerant from the high pressure liquid state and an evaporator for absorbing heat by evaporating the reduced pressure refrigerant from the capillary 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 into a freezer compartment and a refrigerating compartment to cool the inside of the refrigerator and controls temperature control as a fan / compressor drive / stop control. Perform.

On the other hand, among these fan-cooling refrigerators, which convectively cool the air around the evaporator by a fan, the refrigerator that controls the temperature centered on the temperature of the refrigerator compartment has one fan in the freezer compartment and detects it in the refrigerator compartment. In order to liquefy the refrigerant in the fan and gas state when discharging the cold air based on the set temperature, the compressor is controlled to convert the low pressure low temperature refrigerant gas into the high pressure high temperature refrigerant gas to discharge the cold air around the evaporator to the freezer and the refrigerating chamber. To keep the refrigerator at the proper temperature.

In other words, if the detected temperature in the refrigerating compartment is above the predetermined upper limit temperature, the fan and the compressor are simultaneously driven on to cool the freezer compartment and the refrigerating compartment, and if the detected temperature in the refrigerating compartment is lower than the preset lower limit temperature, the fan and compressor are The drive is stopped at the same time to stop cooling.

On the other hand, in order to rapidly freeze food stored in the prior art by adjusting the freezer compartment temperature control lever separately provided to the freezing steel mechanical lever is to block the cold air flowing into the refrigerating compartment to further lower the temperature of the freezer compartment, but Edo fans and compressors are controlled by the temperature center of the refrigerating chamber, that is, they are driven according to a comparison result of a predetermined upper / lower limit temperature and the detected refrigerating chamber temperature, so there is a limit in rapid freezing.

An object of the present invention is to provide a rapid freezing control method of the refrigerator to perform the rapid freezing control in the refrigerator for controlling the temperature of the refrigerator by the temperature center of the refrigerator compartment.

The method for controlling rapid freezing of a refrigerator according to the present invention includes a fan for discharging cold air into a freezer compartment and a refrigerating compartment, and a compressor for converting a refrigerant gas of low temperature and low pressure into a refrigerant gas of high temperature and high pressure to activate a refrigerant circulation, and connected with a mechanical damper. In a refrigerator having a temperature control lever of a freezer compartment, a method of performing rapid freezing while controlling the temperature of the refrigerator based on the temperature of the refrigerator compartment, when the freezer temperature control lever is adjusted to the freezing steel, drives the compressor and the fan to turn on the rapid freezing mode. When the detected temperature of the refrigerating compartment lowers below the preset reference temperature for the rapid freezing of the freezer or when the preset reference time for the rapid freezing elapses, the rapid freezing mode is released and the normal operation mode is switched. Characterized in that comprises a.

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

Figure 2 is a schematic side cross-sectional view of the refrigerator and freezer temperature control lever employed in accordance with a preferred embodiment of the present invention.

3 is a flowchart illustrating a rapid freezing control process of a refrigerator according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: lever detection unit 20: temperature detection unit

30: microcomputer 40: fan drive unit

50: fan 60: compressor drive

70: compressor

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 block diagram of a temperature control apparatus of a refrigerator employed in accordance with the present invention, the first lever detection unit 10, the temperature detection unit 20, the microcomputer 30, the fan drive unit 40, the fan 50, the compressor The drive unit 60 and the compressor 70 is included.

In such a configuration, the lever detection unit 10 is connected to the mechanical damper as shown in FIG. 2 to selectively freeze and block the cold air of the freezer based on the opening and closing operation of the damper to maintain the temperature of the freezer compartment. Is detected by the frozen medicine and the frozen steel and outputs the detection signal, and is generally configured to detect the position of the lever using a Hall element or a photo transistor between the rotating lever and the fixed part.

The temperature detector 20 is installed at a predetermined position in the refrigerating chamber, detects the room temperature of the refrigerating chamber, and applies the detection signal to an A / D (Analog to Digital) port of the microcomputer 20 which will be described later.

The microcomputer 30 is applied to the A / D port through the temperature detector 20 in the normal operation mode, and the detected signal converted into a digital signal is equal to or higher than the preset upper limit temperature (for example, 2.35 ° C.) of the refrigerating chamber. The fan 50 and the compressor 70, which will be described later, are driven on, and if the detection signal is equal to or lower than the appropriate lower limit temperature (for example, 2 ° C) of the predetermined refrigerating chamber, the fan 50 and the compressor 70 are driven off. Perform control.

In addition, when the detection signal indicating the frozen steel from the lever detection unit 10 is applied, the microcomputer 30 switches to the rapid freezing mode so that the refrigerator compartment temperature is equal to or less than a predetermined reference temperature (for example, -10 ° C) for rapid freezing. The fan 50 and the compressor 70 are continuously driven on until a predetermined reference time (for example, 120 minutes) has elapsed for rapid freezing.

On the other hand, the fan driver 40 outputs a predetermined drive signal to the fan 50 under the control of the microcomputer 30 using a drive element and a relay, and the fan 50 is driven from the fan driver 40. Driven based on the signal, as shown in FIG. 2, the cold air around the evaporator is discharged to the freezer compartment and discharged to the freezer compartment through a damper connected to the freezer compartment temperature control lever.

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, with reference to the flowchart of Figure 3 attached to the rapid freezing control process of the refrigerator in the refrigerator according to a preferred embodiment of the present invention including the above-described component will be described in detail.

First, in the normal operation mode, the temperature detector 20 detecting the temperature of the refrigerating chamber detects the temperature inside the refrigerating chamber and applies the detection signal to the A / D port of the microcomputer 30. The detection signal from the temperature detector 20 is converted into a digital signal and applied to the microcomputer 30, and the detected refrigerating chamber temperature and the predetermined upper limit temperature (2.35 ° C in the preferred embodiment of the present invention) and the lower limit are detected. The temperature is controlled by controlling the driving of the fan 50 and the compressor 70 based on the comparison of the temperature (2 ° C).

On the other hand, when the detection signal indicating the frozen steel is applied from the lever detection unit 10 (step 300), the microcomputer 30 switches to the rapid freezing mode to drive the fan 50 and the compressor 70 on (step 302). .

Next, the microcomputer 30 ignores the proper upper limit / lower limit temperature and determines whether the refrigerating chamber temperature detected by the temperature detector 20 falls below a preset reference temperature (eg, −10 ° C.) for rapid freezing. (Step 304).

At this time, if the detected refrigerator compartment temperature is higher than the reference temperature, it is determined whether a predetermined reference time (for example, 120 minutes) has elapsed for rapid freezing (step 306).

At this time, if the reference time has elapsed after switching to the rapid freezing mode, the process proceeds to step 308 to switch back to the normal operation mode, ignoring the reference temperature, and performing temperature control of the refrigerator with an appropriate upper limit / lower limit temperature.

In addition, even if the reference time has not elapsed in the rapid freezing mode, when the temperature of the refrigerating compartment detected by returning to step 304 falls below the reference temperature, the process proceeds to step 308 and switches to the normal operation mode.

That is, in the rapid freezing mode, the freezer compartment is rapidly frozen by continually driving the fan 50 and the compressor 70 based on the reference temperature and the reference time, ignoring the predetermined upper and lower limit temperatures of the refrigerating compartment.

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, there is an effect that the rapid freezing of the freezer compartment can be controlled by controlling the driving of the fan 40 and the compressor 60 under different conditions from the normal operation mode in the rapid freezing mode.

Claims (1)

Refrigerator temperature in a refrigerator equipped with a fan for discharging cold air to the freezer compartment and a refrigerating compartment, and a compressor for converting the refrigerant gas of low temperature and low pressure into a refrigerant gas of high temperature and high pressure to activate the refrigerant circulation more and the temperature control lever of the freezer compartment connected to a mechanical damper. In the method of performing rapid freezing while controlling the temperature of the refrigerator based on the, When the freezer temperature control lever is adjusted to the freezing steel, driving the compressor and the fan to switch to the rapid freezing mode; When the detected temperature of the refrigerating compartment is lowered below the preset reference temperature for the rapid freezing of the freezer or after the preset reference time for the rapid freezing, the rapid freezing mode includes the step of canceling the rapid freezing mode and switching to the normal operation mode. Refrigeration control method.