KR100238799B1 - Quick-freezing control method of a refrigerator - Google Patents

Abstract

The present invention relates to a quick freezing control method of a refrigerator provided with a separate quick freezing compartment to rapidly freeze food, and determining whether food is injected into the quick freezing compartment, and using a low temperature low pressure refrigerant gas during food input. Forcibly driving a compressor for converting a refrigerant gas into a high temperature and high pressure gas, driving a fan for discharging cold air into the freezer compartment and a refrigerating compartment, and driving a fan for discharging cold air into the quick freezer compartment at a set maximum speed; When the temperature falls below the first predetermined reference temperature at which the maximum freezing point is generated, the fan for discharging the cold air into the quick freezing chamber is driven at a normal speed, the compressor is continuously driven, and the fan for discharging the cold air into the freezing compartment and the refrigerating compartment is provided. The control temperature corresponding to the detection temperature of, Stopping driving of the fan for discharging cold air into the quick freezer when the temperature is lower than the predetermined reference temperature, which is a predetermined rapid freezing chamber, and controlling the compressor to drive the fan in response to driving of the fan for discharging cold air to the freezing compartment and the refrigerating chamber; Including, there is an effect that can be stored frozen to maintain the quality, such as the taste and nutrition of cooked food or food to be stored frozen.

Description

METHOD OF QUICK FREEZING CONTROLLING IN A REFRIGERATOR

The present invention relates to a rapid freezing control method of a refrigerator, and more particularly, to a quick freezing control method of a refrigerator provided with a separate quick freezing compartment in a refrigerator having a freezing compartment and a refrigerating compartment to rapidly freeze food.

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 an evaporator that absorbs heat by evaporating high pressure liquid state refrigerant from low pressure state and evaporates it to low temperature. Especially, a fan-cooling refrigerator is a fan for discharging cold air. ) To discharge cold air around the evaporator to the freezer compartment and the refrigerating compartment to cool the inside of the refrigerator, and perform temperature control as a driving / stopping control of the fan and the compressor.

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 gas state and the fan that discharges the cold air around the set temperature, the compressor controls the low pressure low temperature refrigerant gas into the high pressure high temperature refrigerant gas to drive and discharge the cold air around the evaporator to the freezer compartment and the refrigerating compartment. Keep the temperature of the refrigerator 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 food is freezing at high speed when the food is frozen because the taste and nutritional components of the freeze to maintain the initial taste and quality of the food.

In other words, the temperature range in which most of the moisture contained in the food is frozen is usually from -1 ° C to -5 ° C, and the quality of the frozen food is determined in this section, so the passage time of this section is as short as possible and rapidly. It must be frozen in order to maintain the quality of frozen food.

However, in the conventional freezer, rapid freezing was not possible. Therefore, the present invention has been sought for a method of freezing and storing food as quickly as possible by providing a quick freezer in a domestic refrigerator.

It is an object of the present invention to provide a rapid freezing control method of a refrigerator provided with a separate freezing compartment in addition to the freezing compartment and the refrigerating compartment to rapidly freeze food and maintain its quality to the maximum.

1 is a block diagram of a refrigerator to which the rapid freezing control method of the refrigerator according to the present invention is applied.

2 is a flow chart illustrating the operation of the refrigerator according to the method of controlling the rapid freezing of the refrigerator according to the present invention.

<Explanation of symbols for main parts of drawing>

10, 20, 30: 1st, 2nd, 3rd temperature detector 40: microcomputer

50, 60, 70: 1, 2, 3 fan drive unit 80, 90, 100: 1, 2, 3 fan

110: compressor driving unit 120: compressor

The method for controlling the rapid freezing of a refrigerator according to the present invention is a method of rapidly freezing food by providing a separate quick freezer in a refrigerator, and determining whether food is input into the quick freezer, and when food is input into the quick freezer. It drives the compressor for converting the refrigerant gas of low temperature and low pressure into the refrigerant gas of high temperature and high pressure, stops the fan which discharges the cold air into the freezer compartment and the refrigerating compartment, and drives the fan to discharge the cold air into the rapid freezer at the maximum speed. And when the food surface temperature in the quick freezer is below the first predetermined reference temperature at which the maximum freezing point is generated, the fan which discharges the cold air into the quick freezer is driven at a normal speed, the compressor is continuously driven, and the cold air is stored in the freezer and the freezer. Corresponding to the detected temperatures of the freezer and refrigerator compartments Control and the operation of the fan for discharging cold air into the quick freezer compartment when the food surface temperature in the quick freezer temperature is lower than the second reference temperature, which is a predetermined temperature of the quick freezer compartment, and discharge the cold air into the freezer compartment and the freezer compartment. And driving control of the compressor in response to the driving of the fan.

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 refrigerator to which the rapid freezing control method of the refrigerator according to the present invention is applied, wherein the first, second, and third temperature detectors 10, 20, and 30, the microcomputer 40, and the first, second, and third fan drives are illustrated. 50, 60, 70, first, second, and third fans 80, 90, and 100, a compressor driver 110, and a compressor 120.

In this configuration, the first temperature detection unit 10 is installed at a predetermined position in the refrigerating compartment to detect the room temperature of the refrigerating compartment and to describe the first detection signal (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 to detect the room temperature of the freezer compartment and apply a second detection signal to the A / D port of the microcomputer 40.

In addition, the third temperature detector 30 is mounted on the surface of the metal plate (for example, aluminum having high thermal conductivity) in which the food in the quick freezing chamber is provided separately, and detects the temperature of the metal plate to output the third detection signal A of the microcomputer 40. Apply to / D port.

On the other hand, the microcomputer 40 is applied to each of the A / D port in the normal operation mode in order to maintain the appropriate temperature of the refrigerating compartment and freezer compartment preset based on the first detection signal and the second detection signal digitally converted. The two fans 80 and 90 are independently driven and controlled, and the compressor 120 is driven in accordance with the second fan 90, that is, the fan driven to discharge cold air into the freezer compartment.

In addition, the microcomputer 40 stops the normal operation mode and determines the maximum freezing point generation temperature range at which most of the water is frozen when it is determined that food is put into the quick freezing chamber based on the third detection signal for quick freezing control. Has a predetermined first reference temperature (eg, −7 ° C.) or less and a second reference temperature (eg, −25 ° C.) preset to an appropriate temperature of the quick freezing chamber. Selectively driving control of the third fan 100 at a maximum speed (for example, 2400 rpm) and a normal speed (for example, 1800 rpm) based on a result of comparison with a third detection signal that is a temperature of the current quick freezer, The compressor 120 is selectively driven and controlled to a forced drive and a normal operation mode.

The first fan driver 50 outputs a predetermined driving signal to the first fan 80 based on a control signal from the microcomputer 40 using a driving element, a relay, or the like, so that the first fan 80 is A fan dedicated to the refrigerating chamber, which is driven based on a drive signal from the first fan driving unit 50 to discharge cold air around the evaporator (not shown) to the refrigerating chamber.

In addition, the second fan driver 60 outputs a predetermined drive signal to the second fan 90 based on a control signal from the microcomputer 40 using a drive element and a relay, and the second fan 90 is a freezing compartment. A dedicated fan is driven based on the drive signal from the second fan driver 60 to discharge cold air around the evaporator (not shown) into the freezer compartment.

In addition, the third fan driver 70 outputs a predetermined driving signal to the third fan 100 based on a control signal from the microcomputer 40 using a driving element, a relay, or the like, and the third fan 100 A fan dedicated to a quick freezer, which is driven differently at first and second rotational speeds (rotation control as a motor having two tab coils with different coil turns so as to be driven at 1800 rpm and 2400 rpm in a preferred embodiment of the present invention). The rotational speed is selectively driven differently based on the drive signal from the third fan driver 70 to discharge cold air around the evaporator (not shown) into the quick freezing chamber.

Meanwhile, the compressor driver 110 outputs a predetermined drive signal to the compressor 120 based on a control signal from the microcomputer 40 using a drive element, a relay, or the like, and the compressor 120 includes the refrigeration cycle described above. As a preparatory step for liquefying and reusing the vaporized refrigerant in the step, 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 output to the condenser, not shown.

Next, a detailed description will be given with reference to a flowchart of FIG. 2 attached to a process of controlling a quick freezing operation of a refrigerator in a refrigerator according to a preferred embodiment of the present invention including the above-described component unit.

First, it is automatically determined whether the food to be fast-frozen is put in the quick freezing compartment provided separately, the microcomputer 40 is in close contact with the surface of the metal plate (generally, aluminum) on which the food in the quick freezer is placed (third temperature detection unit ( A third detection signal from 30 is determined (step 200).

That is, when the absolute value of the difference value of the temperatures detected by the third temperature detector 30 at predetermined intervals is equal to or greater than a predetermined temperature (for example, 5 ° C.), it is determined that food is put into the quick freezer, and the process proceeds to step 204. If the absolute value is less than or equal to the predetermined temperature, it is determined that no food is put into the quick freezer, and the process proceeds to step 202 where the first fan 80, the second fan 90, and the compressor 120 are operated in a normal normal operation mode. To control.

Meanwhile, in step 204, the microcomputer 40 stops driving the first and second fans 80 and 90, drives the compressor 120 and performs the maximum speed of the third fan 100 in order to perform the rapid freezing control. Drive at 2400 rpm.

Then, most of the cold air around the evaporator (not shown) is intensively introduced into the quick freezing chamber based on the driving of the third fan 100 and rapid freezing is started.

Next, based on the third detection signal from the third temperature detection unit 30, the microcomputer 40 sets the food surface temperature in the quick freezer to the maximum freezing point generation temperature range (for example, -1 ° C to -5 ° C). It is then determined whether or not the predetermined first reference temperature (eg, about −7 ° C.) or less is exceeded (step 206).

At this time, the third detection signal from the third temperature detector 30 indicates the metal plate temperature in the quick freezing chamber, and since the food is closely attached to the metal plate, it can be seen that the metal plate temperature and the surface temperature of the food are the same. In addition, the reason why the first reference temperature is set lower than the maximum freezing point generation temperature range is not to be a surface temperature of the food, but to perform rapid freezing until the entire food, that is, the internal temperature of the food maintains the maximum freezing point generation temperature range.

Next, if the surface temperature of the food is higher than the first reference temperature in the above-described step 206, intensive rapid freezing is continued, and when the food surface temperature in the current quick freezer is lower than the first reference temperature, the first and second fans 80 , 90 is switched to the normal operation mode, that is, the drive control of the first and second fans 80 and 90 is controlled in response to the detected temperatures from the first and second temperature detection units 10, and the compressor 120 Instead of driving control depending on the drive of the two fans 90, the drive is continuously turned on.

In addition, the drive speed is controlled by lowering the rotational speed of the third fan 100 to 1800 rpm (

Step 208).

In detail, the maximum freezing point generation temperature, which determines the quality of food, discharges most of the cold air from the refrigerator to the freezing chamber to perform the rapid freezing control, and the surface temperature of the food is frozen with the freezing control. When the temperature is lower than the point generating temperature range, the first and second fans 80 and 90 are switched to the normal operation mode in order to compensate for the weak cooling of the freezing compartment and the refrigerating compartment, which may be caused by most of the cold air discharge into the quick freezing compartment. The refrigerating chamber is cooled and controlled in response to the detection temperature, and is driven by lowering the rotational speed of the third fan 100 to a normal speed (for example, 1800 rpm).

Next, the microcomputer 40 determines whether the food surface temperature in the quick freezer compartment falls below a second reference temperature (for example, −25 ° C.) set to an appropriate holding temperature of the quick freezer compartment (step 210).

At this time, when the surface temperature of the food in the quick freezer is lower than the second reference temperature, the driving control of the first and second fans 80 and 90 and the compressor 120 is driven and the third fan 100 is stopped in the normal operation control mode. To terminate the freezing control (step 212).

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, by providing a separate quick freezer in the refrigerator to perform a quick freezing control, it is possible to rapidly freeze cooked food or food to be stored frozen to maintain the quality of the taste and nutrition as possible to freeze storage It can be effective.

Claims (2)

A method of rapidly freezing food by providing a separate quick freezer in a refrigerator, the method comprising: determining whether food is added to the quick freezer; When food is added to the quick freezing chamber, a compressor for converting a low temperature low pressure refrigerant gas into a high temperature high pressure refrigerant gas is forcibly driven, stops a fan for discharging cold air into the freezing compartment and the refrigerating compartment, and discharges cold air into the quick freezing chamber. Driving the fan at a set maximum speed; When the surface temperature of the food in the quick freezer is lower than the preset first reference temperature at which the maximum freezing point is generated, the fan for discharging cold air to the quick freezer is driven at a normal speed, the compressor is continuously driven, and the cold air is supplied to the freezer and the freezer. Controlling the fan for discharging corresponding to the detected temperatures of the freezing compartment and the refrigerating compartment; When the surface temperature of the food in the quick freezer is lower than the second reference temperature, which is a predetermined quick freezer proper temperature, the driving of the fan for discharging cold air to the quick freezer is stopped, and the fan for discharging cold air to the freezer compartment and the refrigerating compartment. And correspondingly driving controlling the compressor. The method of claim 1, wherein the determining whether the food is added to the quick freezing chamber is determined by a change in temperature at which the food is in close contact with the quick freezing chamber.

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