KR100377758B1 - Control Method Anti-Weak Freezing in Freezer of Refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator, and more particularly, to a refrigerator control center refrigerator freezer weak cooling prevention control method for preventing the low temperature of the freezer compartment when the ambient temperature is low in the refrigerator control center refrigerator.

According to the present invention, the step of subdividing the refrigerating chamber set temperature into a predetermined range unit, controlling the operation of the compressor according to the currently set refrigerating chamber temperature, detecting the stop time of the compressor, and the stop time of the compressor is more than a predetermined time In the case of continuous, it comprises a step of adjusting the refrigerating chamber set temperature set in the above step by step, and maintaining the current refrigerating chamber set temperature when the compressor is stopped within a predetermined time. Therefore, the refrigeration cycle is driven to supply the cold air to the refrigerator freezer even under the ambient temperature low temperature can prevent the temperature rise of the freezer compartment.

Description

Control Method Anti-Weak Freezing in Freezer of Refrigerator

The present invention relates to a refrigerator, and more particularly, in a refrigerator control center refrigerator, to prevent the compressor from being stopped due to a change in the ambient temperature of the refrigerator to prevent the temperature of the freezer compartment from rising. It is about a method.

A refrigerator is a freezer that supplies cold air into a storage space and maintains food in the storage space at a constant temperature.

The cold air of the refrigerator is generated by the operation of the refrigeration cycle, the refrigeration cycle comprises a compressor, a condenser, a capillary tube, an evaporator. The refrigerant is circulated along the component to change phase and heat exchange with the air circulating in the storage space of the refrigerator to generate cold air.

1 is a block diagram of a conventional refrigerator. As shown in FIG. 1, in a refrigerator having an independent freezing compartment and a refrigerating compartment, a cooling fan 20 for smoothly introducing cold air into the refrigerating compartment and the freezing compartment is installed in the refrigerator. The fan motor 30 is connected to the cooling fan 20. The fan motor 30 is a driving source for driving the cooling fan 20.

And the compressor 10 for supplying cold air in a refrigerator is installed in the lower part of a refrigerator.

One side of the refrigerating compartment and the freezing compartment is provided with a refrigerating compartment temperature detecting sensor 50 and a freezing compartment temperature detecting sensor 60 for respectively detecting the temperature in the refrigerator.

The microcomputer 40 is connected to the refrigerator compartment temperature sensor 50 and the freezer compartment temperature sensor 60. The microcomputer 40 receives a signal from the refrigerator compartment temperature sensor 50 and the freezer compartment temperature sensor 60 to control the operation of the compressor 10.

In addition, an outside air temperature sensor 70 for detecting outside air temperature around the refrigerator is connected to the microcomputer 40.

The microcomputer 40, based on the ambient temperature read from the ambient temperature sensor 70 and the temperature selected by the consumer (weak, weak / red, red, red / strong, steel, etc.) in the current conditions Set the optimum internal temperature. In addition, the microcomputer 40 controls the operation of the compressor 10, the cooling fan 20, and the fan motor 30 according to the set optimum internal temperature (hereinafter, referred to as 'reference set temperature').

The generation of cold air controlled by the microcomputer 40 is performed based on data input from the refrigerating compartment temperature sensor 50.

That is, the microcomputer 40 stops the driving of the compressor 10 and the fan motor 30 when the temperature detected by the refrigerating compartment temperature sensor 50 is lower than the reference set temperature. On the contrary, when the temperature sensed by the refrigerating compartment temperature sensor 50 is higher than the reference set temperature, the compressor 10 and the fan motor 30 are driven to generate cool air to circulate the inside of the refrigerator.

The case where the refrigeration cycle is controlled based on the temperature detected by the refrigerating compartment temperature sensor 50 as described above is called a refrigerating compartment control center refrigerator. That is, the refrigerator control center refrigerator controls the supply of cold air to the refrigerating compartment and the freezing compartment based on the internal temperature of the refrigerating compartment.

On the other hand, when the ambient temperature of the refrigerator decreases, there is no temperature difference between the outside air temperature and the high temperature inside the refrigerator, so that cold air is not required in the inside of the refrigerator. Therefore, when the ambient temperature of the refrigerator is lowered, since the cold air is not required in the refrigerator, the microcomputer 40 does not drive the compressor 10.

In addition, the freezer compartment must maintain a relatively low temperature state than the refrigerator compartment, and since the refrigeration cycle is not operated due to the low temperature of the refrigerator compartment temperature, the supply of cold air to the freezer compartment is not performed, and thus the temperature of the freezer compartment increases.

That is, as the ambient temperature of the refrigerator becomes low, the freezer compartment internal temperature of the refrigerator control center refrigerator increases, and as a result, the cooling state of the freezer compartment becomes weak cooling.

Hereinafter, in the refrigerator compartment control center refrigerator as described above, a freezer compartment weak cooling control method according to the prior art will be described.

Figure 2 is a flow chart illustrating the operation of the freezer compartment cooling control method according to the prior art.

Table 1 is a table showing cold air input conditions and release conditions for preventing a freezer temperature increase according to the external temperature of the refrigerator. In Table 1, RT indicates an external temperature of the refrigerator.

division RT≤8 ℃ 8 ℃ ≤RT≤12.5 ℃ 12.5 ℃ ≤RT≤18 ℃ 18 ℃ ≤RT≤25 ℃ 25 ℃ ≤RT RT detection range RT≤9 ℃ 7 ℃ ≤RT≤13.5 ℃ 11.5 ℃ ≤RT≤19 ℃ 17 ℃ ≤RT≤26 ℃ 24 ℃ ≤RT Input condition (freezer sensor temperature) -11.5 ℃ ↑ -10.5 ℃ ↑ -9.5 ℃ ↑ -7.5 ℃ ↑ -6.5 ℃ ↑ Release condition (Refrigerator sensor temperature) about When reaching 2.5 ℃ When reaching 3.5 ℃ At 4 ℃ When reaching 4.5 ℃ About / Red At -0.5 ℃ At 1 ℃ At 2 ℃ At 3 ℃ enemy At -0.5 ℃ At 1 ℃ At 2 ℃ When reaching 2.5 ℃ Red / strong At -0.5 ℃ At 0 ℃ At 0 ℃ At 0 ℃ River At -1.5 ℃ At 1.5 ℃ At -1.5 ℃ At -1.5 ℃

TABLE 1

When the outside temperature is sensed by the outside temperature sensor 70 and input to the microcomputer 40, the outside temperature range detected by the microcomputer 40 is determined.

In addition, the predetermined temperature recognized by the microcomputer 40 is compared with the outside temperature (step 202), and the freezer temperature detected by the freezer temperature sensor 60 detects the predetermined temperature by the microcomputer 40. The temperature is compared (step 204).

And, in steps 202 and 204, when the outside temperature is lower than the predetermined temperature recognized by the microcomputer 40 and the freezer compartment temperature is higher than the predetermined temperature recognized by the microcomputer 40, the freezer cold compensation function The injection condition is satisfied, and the compressor 10 is driven (step 206).

For example, as shown in Table 1, when the predetermined temperature recognized by the microcomputer 40 is 9 ° C, the outside air temperature is 9 ° C or less, and the predetermined temperature recognized by the microcomputer 40 is -11.5 ° C. If the temperature of -11.5 ° C or more, the freezer compartment weak cooling compensation function is satisfied, the compressor 10 is driven.

The refrigeration cycle is driven by the driving of the compressor 10, and the cold air generated as a result of the operation of the refrigeration cycle is evenly spread throughout the freezer compartment by the rotation of the cooling fan 20 driven by the fan motor 30.

In addition, a minimum function operation time is required for the function input for the freezing compartment weak cooling compensation in the present embodiment, which is 1 minute (step 208).

As the function input condition is satisfied as described above, the cold air supplied to the freezing compartment by the driving of the freezing cycle is sufficient. Therefore, when the freezing cycle is operated to some extent, the function for compensating the freezing compartment weak cooling is required.

The freezer compartment weak cooling compensation function release is controlled to the refrigerator compartment temperature. That is, the refrigerating compartment temperature sensor 50 detects the temperature of the refrigerating compartment in which the temperature is lowered, and inputs the sensed temperature of the refrigerating compartment into the microcomputer 40.

The microcomputer 40 determines whether the current refrigerating compartment temperature detected by the refrigerating compartment temperature sensor 50 has reached the refrigerating compartment temperature set in correspondence with the freezer compartment temperature (step 210), and if the temperature is reached, turns off the compressor. Control to stop the supply of cold air to the freezer compartment (step 212).

For example, as shown in Table 1 above, when the temperature of the freezer compartment is -11.5 ° C and the refrigerating cycle is operated, and the temperature of the refrigerator compartment falls to -0.5 ° C (when the internal temperature selected by the consumer is weak / weak), Operation of the refrigeration cycle is stopped and the freezer cold compensation compensation function is released.

However, the following problems are raised in the control method for the conventional freezer compartment weak cooling prevention operating with the configuration as described above.

Conventional freezer cold control control has an outside air sensor for sensing the outside temperature, the heating element is installed around the outside sensor, such as a transformer, heat sink. The external temperature detected by the outside sensor by the heat generated by the heat generating component has a problem that the accuracy is low.

In addition, the conventional freezer weak cooling control is a complex algorithm combining the refrigerator compartment temperature sensor 50, the freezer compartment temperature sensor 60 and the outside temperature sensor 70. In addition, a problem arises that the cost of the product is increased due to the addition of the freezer compartment temperature sensor 60 and the outdoor temperature sensor 70.

The present invention is to solve the conventional problems as described above, without the freezer temperature sensor and the outside temperature sensor by the microcomputer control to control the freezing chamber weak cooling prevention method of the freezer for preventing the temperature rise of the freezer at low temperature around the refrigerator To provide.

1 is a block diagram of a refrigerator according to the prior art.

2 is an operation flowchart of a freezer compartment cooling control method according to the prior art.

Figure 3 is a block diagram of a refrigerator showing an embodiment for preventing freezing of the refrigerator in accordance with the present invention.

4 is an operation flowchart of an embodiment of a control method for preventing freezing and cooling of a freezer compartment according to the present invention.

5 is an operation flowchart for releasing the refrigerating compartment temperature setting mode is set for preventing the freezer compartment weak cooling according to the present invention.

Explanation of symbols on the main parts of the drawings

10,310 .... Compressor 20,320 ..... Cooling Fan

30,330 .... Fan motor 40,340 ... microcomputer

50,350 .... Refrigeration chamber temperature sensor 60 .......... Freezer temperature sensor

70 ........ Ambient temperature sensor

In the refrigerator freezer compartment weak cooling control method according to the present invention, in the control method for controlling the temperature of the freezer compartment based on the detection temperature of the refrigerator compartment temperature sensor, the step of subdividing the refrigerator compartment set temperature in a predetermined range unit according to the specifications of the product and Controlling the operation of the compressor according to the currently set refrigerator temperature, detecting a stop time of the compressor, and when the stop time of the compressor is continuous for a predetermined time or more, lowering the set temperature of the refrigerator compartment set in the step step by step; And adjusting and maintaining the current refrigerator compartment set temperature when the compressor is stopped within a predetermined time.

In the refrigerator freezer weak prevention control method, the step of lowering the refrigerator compartment set temperature step by step, in the mode in which the refrigerator compartment set temperature is T1, if the compressor does not operate for a predetermined time, the compressor is forcibly driven and the refrigerator compartment set temperature is T2. Down-adjusting to the in mode; and in the mode in which the refrigerating chamber set temperature is T2, the compressor is forcibly driven when the compressor does not operate for a predetermined time in the first cycle and the second cycle, and the compressor does not operate for a predetermined time after the third cycle. When the compressor is forcibly driven and characterized in that it comprises a step of adjusting the refrigerator compartment set temperature down to the mode of T3.

The refrigerator freezer weak prevention control method, characterized in that the refrigerator compartment set temperature T1 is 3.0 ± 1.0 ℃, the refrigerator compartment set temperature T2 is 1.5 ± 0.5 ℃, the refrigerator set temperature T3 is 0.5 ± 0.35 ℃.

In the refrigerator freezer weak cooling control method, the predetermined time period during which the compressor is not driven is 50 minutes.

According to the configuration as described above, the refrigeration cycle is driven to supply the cold air to the refrigerator freezer compartment can prevent the temperature rise of the freezer compartment.

Hereinafter, with reference to the accompanying drawings 3 to 5 will be described in detail a preferred embodiment of the present invention.

Figure 3 is a block diagram of a refrigerator block embodiment of the freezer compartment for preventing cold cooling according to the present invention. As illustrated in FIG. 3, a cooling fan 320 for smoothly introducing cold air into the refrigerating compartment and the freezing compartment is installed in the refrigerator. The fan motor 330 driving the cooling fan 320 is connected to the cooling fan 320. And, the compressor 310 which drives to supply the cold air in the inside of the refrigerator is installed in the lower part of the refrigerator.

In addition, one side of the refrigerating chamber is installed in the refrigerating chamber temperature sensor 350 for detecting the temperature in the refrigerator. A microcomputer 340 that receives a signal input from the refrigerating compartment temperature sensor 350 and controls the driving of the compressor 310 is connected to the refrigerating compartment temperature sensor 350.

Next, the freezer compartment weak cooling prevention control method of the present invention having the configuration as described above will be described.

In the microcomputer 340, a reference set temperature of the refrigerating chamber is set. When the actual temperature of the refrigerating compartment is higher than the set temperature, the microcomputer 340 drives the compressor 310 to control the refrigeration cycle. The actual temperature of the refrigerator compartment is detected by the refrigerator compartment temperature sensor 350 and input to the microcomputer 340.

In the microcomputer 340, the refrigerating chamber reference set temperature is set to 3.0 ± 1.0 ° C (step 412). This set temperature is the holding temperature in the refrigerator compartment in summer. That is, in summer, the outside temperature is high (about 30 ° C) and the refrigerator door is frequently opened and closed, so the temperature inside the refrigerator also rises.

And, when the refrigerator compartment temperature detected by the refrigerator compartment temperature sensor 350 is compared with the size of the refrigerator compartment reference set temperature of 3.0 ± 1.0 ℃ (step 414), if the refrigerator compartment temperature is 3.0 ± 1.0 ℃ or more, the microcomputer The compressor 31 is driven by the control of 340 to operate the refrigeration cycle. The cold air generated by the operation of the refrigeration cycle is introduced into the refrigerator compartment and the freezer compartment.

On the other hand, if the detected temperature of the refrigerating chamber is lower than 3.0 ± 1.0 ℃ temperature of the refrigerating chamber is maintained properly, the compressor is not driven.

Now look at the control method when the ambient temperature drops to spring temperature (about 15 ℃). As the ambient temperature is lowered, the temperature of the refrigerating compartment is also lowered. Therefore, the refrigerating compartment temperature detected by the refrigerating compartment temperature sensor 350 is lower than the reference set temperature (3.0 ± 1.0 ° C.) of the refrigerating compartment set in the microcomputer 340. The compressor 310 is not driven.

As described above, if the compressor is not driven for a predetermined time and in this embodiment for more than 50 minutes (step 416), the microcomputer 340 drives the compressor 310 to drive the refrigeration cycle (step 418), and the refrigerating chamber The reference set temperature is adjusted to 1.5 ± 0.5 ℃ down (step 420).

The temperature detected by the refrigerating compartment temperature sensor 350 is compared with the size of the reference set temperature 1.5 ± 0.5 ° C. (step 422). In step 422, when the inside temperature of the refrigerating compartment is 1.5 ± 0.5 ° C. or more, the microcomputer 340 controls the compressor 310 to supply cold air to the refrigerating compartment and the freezing compartment, respectively.

That is, by setting the reference set temperature of the refrigerating chamber downward to 1.5 ± 0.5 ℃ as described above, the microcomputer 340 can operate the compressor 310 even if the ambient temperature is lowered to supply cold air to the freezing chamber The temperature rise in the freezer compartment can be prevented.

Next, a description will be given of a control method for preventing freezing of the freezer in the case where the ambient temperature of the refrigerator further decreases to a winter temperature (about 5 ° C.).

In the first cycle, it is determined whether the time when the compressor 310 is not driven is longer than a predetermined time (50 minutes in the present embodiment) (step 424).

As a result of the determination in step 424, even when the driving time of the compressor 310 is not driven for 50 minutes or more, the microcomputer 340 forces the compressor 310 to be driven as it is until the first cycle is completed. (Step 426).

When the compressor 310 is driven within 50 minutes, the refrigerator 310 maintains 1.5 ± 0.5 ° C., which is a refrigerating chamber set temperature mode at an external temperature (step 428). Here, one cycle is a basic unit in which the microcomputer 340 controls the compressor 310.

As described above, steps 420 to 430 are referred to as a first cycle. In the first cycle, after the refrigerating chamber set temperature is lowered, the driving-off time of the compressor 310 has elapsed for a predetermined time (50 minutes in the present invention). 340 refers to a cycle forcibly driving the compressor 310. Accordingly, it is determined whether the first cycle is completed (step 430). As a result of the determination of step 430, the process returns to step 424 if the first cycle is not completed, and enters the second cycle if the first cycle is completed.

In operation 432, it is determined whether the off time of the compressor 310 is longer than a predetermined time (50 minutes in the present embodiment) in the second cycle. As a result of the determination in step 432, the algorithm in the second cycle is the same as in the first cycle. That is, when the compressor 310 is not driven, the microcomputer 340 is in the current state until the completion of the second cycle. Is forcibly driven to supply cold air into the freezer compartment (step 434).

When the compressor 310 is driven within 50 minutes, the reference set temperature 1.5 ± 0.5 ° C., which is the refrigerating chamber set temperature mode, is maintained (step 436).

Next, it is determined whether the second cycle is completed, and if the second cycle is not completed, the process returns to step 432, and if it is completed, enters the next step (step 438). Steps 432 to 438 are referred to as second cycles. In the second cycle, after the cycle of the first cycle is completed and the compressor 310 is forcibly driven, the drive-off time of the compressor 310 elapses for a predetermined time (50 minutes in the present invention), and the microcontroller 340 Again, this is a cycle in which the compressor 310 is forcibly driven.

As a result of the determination of step 438, when the second cycle is completed and enters the third cycle, it is determined whether the off time of the compressor 310 is longer than a predetermined time (50 minutes in this embodiment) (step 440).

As a result of the determination in step 440, if there is no driving of the compressor 310, the compressor 310 is forcibly driven (step 442), and the reference set temperature of the refrigerating compartment is lowered to 0.5 ± 0.35 ° C. (step 444). ).

That is, even if the compressor 310 does not operate even in the third cycle, since the external temperature is very low temperature, the refrigerating chamber temperature is also very low, and thus the refrigeration cycle is not operated.

Accordingly, when the compressor 310 is not driven even in the third cycle, as in the steps 440 to 444, the microcomputer 340 drives the compressor 310 and lowers the set temperature of the refrigerating compartment. To control.

As a result of the determination of step 440, if the compressor 310 is driven within 50 minutes, the current temperature of the refrigerator compartment temperature mode is maintained at 1.5 ± 0.5 ° C. (step 446).

After the fourth cycle, the same process as the operation in the third cycle is repeated (step 440). That is, if the compressor 310 does not operate for a predetermined time (50 minutes in the present embodiment), the compressor 310 is forcibly driven, and the refrigerator compartment set temperature is lowered to 0.5 ± 0.35 ° C. and set in the microcomputer 340 to freeze. Control the cycle.

When the compressor 310 is driven within 50 minutes, the current refrigerator compartment temperature mode state is maintained as it is. Steps 440 to 450 are referred to as the third cycle, and the third cycle is the refrigerator compartment reference set temperature (1.5). After the refrigerating chamber reference set temperature is lowered to 0.5 ° C. ± 0.3 ° C. at 0.5 ° C. ± 0.5 ° C., the drive-off time of the compressor 310 has elapsed for a predetermined time (50 minutes in the present invention), and the microcontroller 340 is driven to After the third cycle, the fourth cycle is followed by the same control procedure as that of the third cycle. Thus, it is assumed that the operation cycle repeated from the third cycle is a 3 to n cycle period.

Next, a control method of the refrigerating compartment temperature setting mode as the external temperature increases based on FIG. 5 will be described.

5 is an operation flowchart illustrating a control process of a refrigerating compartment temperature setting mode as the external temperature increases. When the external temperature rises, the refrigerator compartment temperature setting mode is controlled as the operation rate of the compressor 310.

Now, the microcomputer 340 has set 0.5 ± 0.35 ° C. as the refrigerating chamber reference set temperature (step 500). This set temperature is the holding temperature in the refrigerator compartment in winter. That is, because the winter outside temperature is a low temperature (about 5 ℃), the reference temperature set in the refrigerating chamber as low as 0.5 ± 0.35 ℃.

Then, the inside temperature of the refrigerating chamber and the size of the reference temperature set to the refrigerator compartment 0.5 ± 0.35 ℃ is compared (step 510).

As a result of the determination in step 510, when the refrigerator compartment temperature detected by the refrigerator compartment temperature sensor 350 is 0.5 ± 0.35 ° C. or more, the compressor 310 is driven under the control of the microcomputer 340 (operation 512). .

And a refrigeration cycle is driven by the drive of the compressor 310, the cold air generated by the operation of the refrigeration cycle is introduced into the refrigerator compartment and the freezer compartment.

On the other hand, if the detected temperature of the refrigerating chamber is 0.5 ± 0.35 ° C or less, the temperature of the refrigerating compartment is maintained properly, the compressor is not driven.

Now look at the control method when the ambient temperature rises to the spring autumn temperature (about 15 ℃). As the ambient temperature is increased, the temperature of the refrigerating compartment is also increased. Therefore, since the refrigerator compartment internal temperature detected by the refrigerating compartment temperature sensor 350 will be higher than the reference set temperature of the refrigerating compartment set in the microcomputer 340, the compressor 310 is driven. Will be.

As described above, when the temperature inside the refrigerator compartment is raised and the compressor 310 is driven, the continuous operation rate of the six cycles of the compressor 310 is measured, and it is determined whether the continuous operation rate of the six cycles is 25% or more. The six cycles refer to an operation cycle according to the continuous operation rate of the compressor which is changed as the external temperature condition increases. That is, according to the continuous operation rate of the compressor, the microcontroller drives the control by raising the refrigerating chamber reference set temperature.

Therefore, as a result of the determination in step 514, if the continuous operation rate of 6 cycles is 25% or more, the refrigerator computer reference setting temperature is set to 1.5 ± 0.5 ° C in the microcomputer 340 (step 516).

Since the difference between the internal temperature of the refrigerating compartment and the refrigerating compartment temperature set in the microcomputer 340 is increased, the compressor 310 is driven. If the continuous operation rate of the six cycles of the compressor is 25% or more, an overcooling phenomenon occurs. Setting it up.

As a result of the determination in step 514, if the six-cycle continuous operation rate of the compressor is not 25% or more, the set temperature in the refrigerator compartment is maintained at 0.5 ± 0.35 ° C, which is the current reference set temperature (step 500).

If the temperature further rises to a summer temperature (about 30 ° C.), the temperature inside the refrigerator compartment also rises. Therefore, since the temperature inside the refrigerator compartment detected by the refrigerator compartment temperature sensor 350 is higher than the reference set temperature set in the microcomputer 340, the compressor 310 is driven to operate the refrigeration cycle.

The six-cycle continuous operation rate of the compressor 310 is measured, and it is determined whether the six-cycle continuous operation rate is 40% or more (step 522).

As a result of the determination in step 522, if the six-cycle continuous operation rate of the compressor 310 is 40% or more, the refrigerating chamber reference set temperature set in the microcomputer 340 is adjusted to 3.0 ± 1.0 ° C. (step 524).

If the six-cycle continuous operation rate of the compressor 310 does not exceed 40% as a result of the determination in step 522, the existing refrigerator compartment reference set temperature of 1.5 ± 0.5 ° C. is maintained (step 526).

The upward adjustment of the refrigerating compartment reference set temperature as the ambient temperature rises is a process of releasing the control process of adjusting the refrigerating compartment reference set temperature downward in order to prevent weak cooling of the freezer compartment.

Although embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited thereto, and the present invention is not limited to the scope of the present invention provided in the following claims. It will be readily apparent to those skilled in the art that various modifications and variations can be made.

The control method for preventing the freezing compartment weak cooling according to the present invention having the configuration as described above has the following effects.

By lowering the reference set temperature set in the microcomputer as the refrigerator outdoor temperature is lowered, it is possible to prevent the rise of the freezer temperature in a low temperature environment of the refrigerator without adding a freezer temperature sensor and an outside temperature sensor, thereby reducing product cost. And it is effective to prevent the decay of food in the storage space.

Claims (4)

A control method for controlling the temperature of a freezer compartment based on a detected temperature of a refrigerator compartment temperature sensor: Subdividing the refrigerator compartment set temperature into predetermined range units according to a product specification; Controlling the operation of the compressor according to the currently set refrigerator temperature and detecting a stop time of the compressor; If the stop time of the compressor is continuous for more than a predetermined time, the step of adjusting the refrigerator compartment set temperature set in the step down step by step, and if the stop state of the compressor is within a predetermined time to maintain the current refrigerator compartment set temperature Freezer cold control method of the refrigerator characterized in that it comprises a. The method of claim 1, wherein the step of adjusting the refrigerating chamber set temperature downward step by step: In a mode in which the refrigerating chamber set temperature is T1, forcibly driving the compressor when the compressor does not operate for a predetermined time, and adjusting the refrigerating chamber set temperature to a mode in which the refrigerator set temperature is T2; In the mode where the refrigerating chamber set temperature is T2, the compressor is forcibly driven when the compressor does not operate for a predetermined time in the first cycle and the second cycle, and after the third cycle, the compressor is forcibly driven and the refrigerator set temperature when the compressor does not operate for the predetermined time. How to control the freezer compartment cold cooling of the refrigerator characterized in that it comprises a step of down-regulating the mode to T3. The method of claim 2, wherein the refrigerating compartment set temperature T1 is 3.0 ± 1.0 ° C., the refrigerating chamber set temperature T2 is 1.5 ± 0.5 ° C., and the refrigerator set temperature T3 is 0.5 ± 0.35 ° C. . The method of any one of claims 1 to 3, wherein the freezer compartment low temperature cooling control method of the refrigerator according to any one of claims 1 to 3, wherein a predetermined time period during which the compressor is not driven is 50 minutes.