KR19990013157A - Quick freezing control method in the refrigerator - Google Patents

Abstract

The present invention relates to a quick freezing control method of a refrigerator provided with a separate metal freezing compartment to rapidly freeze food, and determining whether a temperature difference between the temperature of the quick freezer and the metal plate on which the food is placed is a predetermined temperature or more; If the temperature difference is more than a predetermined temperature, it is determined that food is put into the quick freezer, forcibly driving the compressor for converting the low temperature low pressure refrigerant gas into the high temperature and high pressure refrigerant gas, and stopping the fan for discharging the cold air into the freezer compartment and the refrigerating compartment. Driving the fan for discharging the cold air to the furnace; and if the temperature difference between the quick freezer compartment and the metal plate becomes less than a predetermined temperature, the compressor is continuously driven and the fan is driven to discharge the cold air into the freezer compartment and the refrigerating compartment. Control the temperature according to the detected temperature Controlling the quasi-temperature to a predetermined temperature upward, and stopping the driving of the fan for discharging the cold air into the quick freezer when the metal plate temperature is lower than the predetermined temperature, and for driving the fan for discharging the cold air to the freezer and the refrigerating chamber. Controlling the temperature by lowering the temperature to an initial value and controlling the compressor in response to driving of a fan for discharging cold air into the freezer compartment and the refrigerating compartment. It can be kept frozen.

Description

Quick freezing control method in the refrigerator

The present invention relates to a quick freezing control method in a refrigerator, and more particularly, to a quick freezing control method in 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 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, a 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 performs temperature control as drive control of the fan and the compressor.

On the other hand, among these intercooled refrigerators forcibly condensing the cold air around the evaporator to the fan, the refrigerator having a temperature control centered on the temperature of the refrigerator compartment includes a fan in the freezer compartment and uses the fan and the compressor based on the temperature detected in the refrigerator compartment. By driving control, the cold air around the evaporator is discharged into the freezer and the refrigerating chamber to maintain the temperature of the refrigerator at an appropriate temperature.

In addition, in a refrigerator that controls temperature mainly in each of the freezer compartment and the refrigerating compartment, two fans for discharging cold air into the freezer compartment and the freezer compartment are driven and controlled independently based on the detected temperatures of the freezer compartment and the freezer compartment and discharged cold air into the freezer compartment. The compressor is controlled according to the driving of the fan to maintain the temperature of the refrigerator at an appropriate temperature.

On the other hand, cooked foods or foods that are intended to be stored frozen freezes its taste and nutritional ingredients when frozen, so when frozen, foods should be frozen at high speed to maintain their initial taste and quality.

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. Therefore, the passage time of this section is made as short as possible to the metal. It must be frozen in order to maintain the quality of frozen food.

However, it was impossible to freeze the metal in the conventional freezer, and accordingly, 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 in a refrigerator provided with a separate quick freezing chamber in addition to the freezing compartment and the refrigerating compartment to rapidly freeze food and maintain its quality to the maximum.

In addition, the rapid freezing control method in the refrigerator according to the present invention is a method of rapidly freezing food by providing a separate quick freezer in the refrigerator, wherein the temperature difference between the temperature of the quick freezer and the metal plate on which the food is placed is a predetermined temperature or more. If the temperature difference is greater than a predetermined temperature, it is determined that food is put into the quick freezer compartment, thereby forcibly driving a compressor for converting a low temperature low pressure refrigerant gas into a high temperature high pressure refrigerant gas, and driving a fan for discharging cold air into the freezer compartment and the refrigerating compartment. Stopping and driving a fan for discharging cold air into the quick freezing chamber; and if the temperature difference between the temperature of the quick freezing chamber and the metal plate on which the food is placed falls below a predetermined temperature, the compressor is continuously forced to discharge the cold air into the freezing chamber and the refrigerating chamber. Drive the fan to the detected temperatures in the freezer and And controlling the reference temperature for driving the fan upward by a predetermined temperature; and stopping the driving of the fan for discharging cold air into the quick freezing chamber when the temperature of the metal plate in the quick freezing chamber is lower than the preset quick freezing temperature. And controlling the reference temperature for driving the fan for discharging cold air to the refrigerating chamber to an initial value and controlling the compressor in response to the driving of the fan for discharging cold air to the freezer compartment and the refrigerating chamber. .

1 is a hardware block diagram for performing a quick freezing control in a refrigerator according to a preferred embodiment of the present invention.

2 is a flow chart illustrating a rapid freezing control process in a refrigerator according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10, 20, 30, 40: 1st, 2nd, 3rd, 4th temperature detector

50: micom

60, 70, 80: 1st, 2nd, 3rd fan drive unit

90: compressor drive unit

100, 110, 120: 1st, 2nd, 3rd fan

130: 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 hardware block diagram for performing a quick freezing control in a refrigerator according to a preferred embodiment of the present invention, the first, second, third, fourth temperature detector (10, 20, 30, 40), the microcomputer 50 And first, second and third fan drives 60, 70, and 80, compressor driver 90, first, second and third fans 100, 110 and 120, and compressor 130.

In this configuration, the first temperature detector 10 is installed at a predetermined position in the refrigerating compartment to detect the room temperature of the refrigerating compartment to describe the first detection signal (generally, the DC value of the voltage level) of the microcomputer 50 described later. / D (Analog to Digital) port.

The second temperature detector 20 is installed at a predetermined position in the freezer compartment and detects the freezer compartment temperature to apply a second detection signal to the A / D port of the microcomputer 50.

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, detects the temperature of the metal plate, and sends a third detection signal to the A of the microcomputer 50. Apply to / D port.

On the other hand, the fourth temperature detector 40 is mounted at a predetermined position in the quick freezer compartment to detect the room temperature of the quick freezer compartment and apply a fourth detection signal to the A / D port of the microcomputer 50.

In addition, the microcomputer 50 is applied to each of the A / D ports in the normal operation mode so as to maintain appropriate temperatures of the refrigerating compartment and the freezing compartment preset based on the first and second detection signals digitally converted. The two fans 100 and 110 are driven and controlled independently, and the compressor 130 drives and drives the second fan 110 in response to a fan driving to discharge cold air into the freezer compartment.

In addition, when the difference between the third detection signal and the fourth detection signal is greater than or equal to the predetermined temperature, the microcomputer 50 determines that food is put into the quick freezing chamber, stops the normal operation mode, and performs the quick freezing control described later.

The first fan driver 60 outputs a predetermined drive signal to the first fan 100 based on a control signal from the microcomputer 50 using a driving element, a relay, or the like, and the first fan 100 A fan dedicated to the refrigerating compartment, which is driven based on a drive signal from the first fan drive unit 60 to discharge cold air around the evaporator (not shown) to the refrigerating compartment.

In addition, the second fan driver 70 outputs a predetermined drive signal to the second fan 110 based on a control signal from the microcomputer 50 using a driving element, a relay, or the like, and the second fan 110 As a fan dedicated to the freezer compartment, it is driven based on a drive signal from the second fan driver 70 to discharge cold air around the evaporator (not shown) into the freezer compartment.

Meanwhile, the third fan driver 80 outputs a predetermined drive signal to the third fan 120 based on a control signal from the microcomputer 50 using a driving element, a relay, and the like, and the third fan 120 A fan dedicated to the quick freezer, which is driven based on a drive signal from the third fan drive unit 80 to discharge cold air around the evaporator (not shown) into the quick freezer.

In addition, the compressor driver 90 outputs a predetermined drive signal to the compressor 130 based on the control signal from the microcomputer 50 using a drive element, a relay, or the like, and the compressor 130 is a refrigeration cycle as described above. As a preparation step for liquefying and re-liquefying the vaporized refrigerant in the compressed low-temperature low-pressure refrigerant gas from the evaporator (not shown) is converted into a high-temperature high-pressure refrigerant gas and output to the condenser (not shown) to activate the circulation of the refrigerant.

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

First, it is automatically determined whether the food to be fast-frozen is put into the quick freezing compartment provided separately, the microcomputer 50 is a third temperature detection unit mounted in close contact with the surface of the metal plate (generally, aluminum) on which the food in the quick freezing chamber is placed ( Whether the absolute value of the difference between the third detection temperature from 30) and the fourth detection temperature from the fourth temperature detection unit 40, which is the room temperature of the quick freezing chamber, is greater than or equal to a predetermined temperature (3 ° C. in a preferred embodiment of the present invention). Determine (step 200).

In other words, when the food is not added to the quick freezer, the temperature of the metal plate on which the food is placed and the room temperature of the quick freezer are maintained at the same state. The initial temperature is transferred to a metal plate with high thermal conductivity, which causes a difference in room temperature between the metal plate and the quick freezer.

Therefore, if the absolute value of the difference between the room temperature of the metal plate and the quick freezer is greater than or equal to a predetermined temperature, the process proceeds to step 204. If the absolute value of the car is less than the purge temperature, it is determined that no food is introduced into the quick freezer. To drive the first fan 100, the second fan 110, and the compressor 130 in a normal operation mode.

On the other hand, in step 204, the microcomputer 50, in order to perform the rapid freezing control, the reference temperature which is the temperature of the refrigerating compartment and freezer compartment detected by the first and second temperature detectors 10. 20 and the preset refrigerating compartment and the freezer compartment. In response to the comparison result of temperature, driving of the first and second fans 100 and 110 that are driven is stopped, and the compressor 130 and the third fan 120 are driven on.

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 to start the quick freezing.

Next, the microcomputer 50 determines that the absolute value of the difference between the third detection signal from the third temperature detection unit 30 and the fourth detection signal from the fourth temperature detection unit 40 is a predetermined temperature (in a preferred embodiment of the present invention). 1 ° C) or less (step 206).

At this time, if the temperature of the metal plate indicated by the third detection signal, that is, the temperature of the food and the room temperature of the quick freezer compartment represented by the fourth detection signal, does not decrease by a predetermined temperature difference, intensive rapid freezing is continued. It is determined that the product is frozen after passing through the maximum freezing point generation temperature range, and the reference temperature of the predetermined refrigerator compartment and the freezer compartment for driving the first and second fans 100 and 110 is adjusted upward by a predetermined temperature (for example, 1 ° C.). Thus, the first and second fans 100 and 110 are switched to the normal operation mode, and the compressor 130 continues to be driven on instead of being driven by the drive of the second fan 90 (step 208).

In detail, the maximum freezing point production temperature zone, which determines the quality of food, discharges most of the cold air from the refrigerator into the rapid freezing chamber to perform rapid freezing control, and the temperature of the food and the rapid freezing chamber are predetermined. When the temperature difference narrows, it is determined that the maximum freezing point generation temperature range has been passed, and the first and second parts of the freezing compartment and the refrigerating compartment may be compensated for by the rapid freezing, which may be caused by the discharge of most cold air into the quick freezing chamber. The fans 100 and 110 are switched to the normal operation mode so that the freezer compartment and the refrigerating compartment are cooled and controlled in response to the detected temperature.

At this time, the detected temperature from the first and second temperature detectors 10 and 20, that is, the current temperature of each of the refrigerating compartment and the freezing compartment and the respective reference temperatures serving as a reference for preset fan driving on / off are compared with each other. In order to control the two fans 100 and 110, respectively, the reference temperatures are adjusted upward by a predetermined temperature (for example, 1 ° C.) to increase and control the appropriate temperatures of the refrigerating compartment and the freezing compartment by the predetermined temperature.

Then, it is possible to discharge the cold air from the evaporator (not shown) to the quick freezer more than normal operation to compensate for the temperature of the quick freezer.

Next, the microcomputer 50 determines whether the metal plate of the quick freezer, that is, the food temperature, falls below a predetermined reference temperature (eg, −25 ° C.) at a proper holding temperature of the quick freezer (step 210).

At this time, when the temperature of the current food drops below -25 ° C, it is determined that the food is rapidly frozen, and then the driving reference temperature of the first and second fans 100.110 is adjusted again to a predetermined temperature (1 ° C) to lower the normal operation. In the control mode, the drive control of the first and second fans 100 and 110 is performed, and the compressor 120 which has been forced to be driven on is driven to be slaved to the second fan 110 as in the normal operation, and the third fan 120 is controlled. ) And stops the rapid 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 (1)

A method of freezing food rapidly by providing a separate quick freezer in the refrigerator, Determining whether a temperature difference between the temperature of the quick freezing chamber and the metal plate on which the food is placed is a predetermined temperature or more; When the temperature difference is greater than a predetermined temperature, it is determined that food is put into the quick freezer, forcibly driving a compressor for converting a low temperature low pressure refrigerant gas into a high temperature high pressure refrigerant gas, and stopping a fan for discharging cold air into the freezer compartment and the refrigerating compartment, Driving a fan for discharging cold air into the quick freezing chamber; When the temperature difference between the temperature of the quick freezer compartment and the metal plate on which the food is placed becomes less than a predetermined temperature, the compressor is continuously forced to control the driving of the fan for discharging cold air into the freezer compartment and the refrigerating compartment in response to the detected temperature of the freezer compartment and the refrigerator compartment. Controlling a reference temperature for driving a predetermined temperature upwardly; When the temperature of the metal plate in the quick freezing chamber is lower than the predetermined quick freezing proper temperature, the drive of the fan for discharging cold air to the quick freezing chamber is stopped, and the reference temperature and initial value for driving the fan for discharging cold air to the freezing chamber and the refrigerating chamber. And controlling the compressor in response to the driving of the fan which discharges the cold air into the freezer compartment and the refrigerating compartment.