KR19980025387A - Refrigeration temperature control method and apparatus - Google Patents

Abstract

The present invention relates to a temperature control method and apparatus for a refrigerator in accordance with a temperature control method based on a refrigerating compartment temperature, and to maintain a constant temperature of the freezing compartment (7) regardless of the change in ambient temperature. The compressor operation step (M) of applying the power to operate the compressor to provide a means for intensively supplying cold air to the input position of the high-temperature load after sensing the input position to quickly local cooling; A refrigerating compartment temperature control step (R) of sensing the refrigerating compartment 1 temperature and rotating the synchronous motor to a deployment position if the set temperature is exceeded; When the temperature of the refrigerating compartment (1) is below the set temperature, the freezer compartment temperature control step (F) of detecting the temperature of the freezer compartment (7) and stopping the operation of the compressor if the set temperature is below the set temperature, and rotating the synchronous motor to the fully closed position if the set temperature is exceeded. Wow; When a temperature difference Δr greater than an allowable value is generated between the respective parts of the refrigerating chamber 1, the synchronous motor is detected by a predetermined angle so that the cold air can be supplied intensively to the high temperature part after detecting the temperature difference Δr. In the refrigerator compartment concentrated cooling step (C) to open only the predetermined cold air flow path until the refrigerator compartment (1) is maintained below the set temperature, consisting of, the operation rate of the refrigerator is lowered according to the influence of the ambient temperature freezer compartment (7) The temperature control method of the refrigerator, which does not have to worry about the temperature rise, prevents unnecessary power loss, and improves the cooling performance of the refrigerating chamber and the reliability of the product due to its excellent ability to respond to high temperature loads and cooling speed. To the device.

Description

Refrigeration temperature control method and apparatus

The present invention relates to a temperature control method and a device of the refrigerator, and in particular, in a refrigerator having a reference temperature control method of a refrigerator compartment, by detecting a change in ambient temperature and controlling the freezer compartment within a short time to prevent unnecessary power loss. When a high temperature load such as hot food is put into the refrigerator, the input position is sensed and the cold load of the freezer compartment is concentrated at the input position of the high temperature load to quickly cool it locally so as not to spread the high temperature load. The present invention relates to a temperature control method and a device for a refrigerator having improved response capability.

In general, the temperature control apparatus of the refrigerator according to the prior art, as shown in Figure 5 and 6, the manual damper (2) for adjusting the amount of cold air supplied to the refrigerating chamber (1); It consisted of the refrigerator compartment temperature sensor r for sensing the temperature of the refrigerator compartment 1.

The conventional refrigerator has a cold air flow path 6 in which some of the cold air cooled in the evaporation chamber (not shown) penetrates the shroud 4 and the barrier 5 below the shroud 4 by the rotation of the fan 3. ) Is sequentially supplied to the refrigerating chamber (1) while circulating in the refrigerating chamber (1). The cold air introduced into the refrigerating compartment 1 is continuously operated until the temperature is sensed by the refrigerating compartment temperature sensor r, and the temperature of the refrigerating compartment 1 reaches a set temperature (3 ° C.). Reaches the set temperature, operation stops regardless of the temperature of the freezer compartment 7.

At this time, the manual damper (2) installed to open and close at the inlet of the shroud (4) is operated to adjust the amount of cold air flowing into the entire refrigerating chamber (1).

As a result, the refrigerator of the conventional refrigerating compartment temperature reference temperature control method is that the refrigerator is operated until the temperature of the refrigerating compartment 1 reaches the set temperature (3 ° C.) and the compressor is operated to maintain the set temperature. The freezer compartment 7 is configured to maintain the temperature of the freezer compartment only for a time when the compressor is operated in order to maintain the temperature of the refrigerating compartment 1 without a separate temperature sensor.

For example, in the refrigerator of the conventional refrigerator compartment temperature reference temperature control method for maintaining the refrigerator compartment temperature uniformly at 3 ℃, the refrigerator compartment set temperature even when there is a change in the ambient temperature with respect to 30 ℃, the ambient temperature is 15 ℃ and Comparing the freezer temperature and operation rate when the temperature is lowered to 15 ° C, respectively, when the reference temperature is 30 ° C, the normal operation state is maintained at 3 ° C in the freezer temperature, -20 ° C in the freezer temperature and 45% in the operation rate. When the temperature is 15 ℃, only 25% of the operation rate is sufficient to maintain the temperature of the refrigerator compartment at 3 ℃, so the freezer temperature is relatively high at -17 ℃, and when the ambient temperature is 5 ℃, the refrigerator compartment temperature is 3 In order to maintain the ℃ 3% is enough to maintain only the operation rate because the freezer temperature is further increased to -13 ℃ was found through experiments. In particular, during winter, when the ambient temperature gradually decreases and remains below 5 ° C, the operation rate of the refrigerator approaches 0%, and the compressor is hardly operated. Thus, the freezer temperature is -10 ° C, which is much higher than the freezer set temperature of -18 ° C. Will be maintained.

As a result, in the conventional refrigerator compartment temperature reference temperature control method as described above, the compressor (not shown) is operated and stopped according to the temperature of the refrigerator compartment 1, that is, the temperature of the refrigerator compartment 1 is set to a set temperature (3 ° C). ), The compressor is stopped regardless of the temperature of the freezer compartment 7. At this time, when the ambient temperature of the refrigerator decreases to a low temperature, the operation rate of the refrigerator decreases and the temperature of the freezer compartment 7 rises, thereby increasing the temperature in the freezer compartment 7. There was a problem that the stored frozen foods were thawed and eventually dropped freshness.

In addition, there is a problem that the cooling rate and the cooling performance of the refrigerating compartment (1) is lowered by reducing the inflow of the cold air flowing into the refrigerating compartment (1) by the resistance of the manual damper (2) for adjusting the amount of cold air in the refrigerating compartment (1). .

Therefore, the present invention has been made to solve the above problems, by detecting a change in the ambient temperature to control the freezer compartment temperature in a short time to prevent unnecessary power loss, when the high temperature load in the refrigerator Provides the ability to cope with the input of high temperature load by intensively supplying the cold air of the freezer compartment to the hot load input position and locally cooling it, and the temperature control method and the apparatus of the refrigerator which the refrigerator compartment can improve the cooling speed and cooling performance The purpose is to provide.

1 is a longitudinal sectional view schematically showing a temperature sensing structure of a refrigerator according to the present invention;

2 is a longitudinal sectional view showing a cold air flow path structure of a refrigerator according to the present invention;

3A to 3D are enlarged views of a portion A showing the cold air control structure of the refrigerator according to FIG. 1;

Figure 3a is an operating state of the cold air breaker is adjusted to supply the cold air throughout the refrigerating chamber,

3b is an operating state of the cold air circuit breaker adjusted to completely block the inlet of the cold air flow path of the refrigerating compartment to rapidly cool the freezing compartment;

Figure 3c is an operating state of the cold air circuit breaker is adjusted so that the central portion of the refrigerator compartment concentrated cooling,

Figure 3d is an operating state of the cold air breaker is adjusted so that the lower end of the refrigerator compartment concentrated cooling,

4 is a flowchart illustrating a temperature control of a refrigerator according to the present invention;

5 is a longitudinal sectional view schematically showing a temperature sensing structure of a refrigerator according to the prior art;

6 is an enlarged view of a portion B showing the cold air control structure according to FIG. 5.

* Description of the symbols for the main parts of the drawings *

M: Compressor operation stage R: Refrigerator temperature control stage

F: Freezer temperature control step C: Freezer cooling step

C1: Central intensive cooling stage C2: Lower intensive cooling stage

C3: Final check of fridge temperature f: Freezer temperature sensor

r, r1, r2, r3, r4: Refrigeration chamber temperature sensor θ: Blocking film rotation angle

1: refrigerating chamber 2: manual damper

3: Fan 4: Shroud

5: Barrier 6: chilled euro

7: Freezer 8: Central centralized cooling flow path

9: Lower intensive cooling flow path 10: Main cold air flow path

11: cold breaker 11a: barrier

11b: Rib

The temperature control method of the refrigerator according to the present invention for achieving the above object comprises a compressor operation step of operating the compressor by applying power; A refrigerator compartment temperature control step of sensing a refrigerator compartment temperature and rotating the synchronous motor to a deployment position when the refrigerator compartment temperature is exceeded; A freezer compartment temperature control step of detecting a freezer compartment temperature when the refrigerating compartment temperature is less than or equal to the preset temperature, and stopping the operation of the compressor when the freezer compartment temperature is less than or equal to the preset temperature; When the temperature difference between the parts in the refrigerator compartment exceeds the allowable value, when the temperature difference is detected, the synchronous motor is rotated by a predetermined angle to maintain the temperature below the set temperature in the refrigerator compartment so that the cold air can be intensively supplied to the high temperature portion. It consists of a concentrated cooling step of the refrigerator compartment that will open only a predetermined cold air flow path until.

Particularly, the centralized cooling step of the refrigerating compartment may include: a centralized centralized cooling step of opening a centralized centralized cooling flow path by rotating a synchronous motor by a predetermined angle when the centralized detection temperature is greater than the allowable temperature of the lower end; A lower end centralized cooling step of rotating the synchronous motor by a predetermined angle to open only the lower end centralized cooling flow path when the lower end detected temperature is greater than the allowable temperature; If the temperature difference between the center sensing temperature and the lower sensing temperature is within the allowable value, it is characterized in that the final check step of the refrigerating chamber temperature to check this and return to the initializing state of the compressor.

The temperature control apparatus of the refrigerator according to the temperature control method of the present invention as described above includes a freezer compartment temperature sensor for sensing the temperature of the freezer compartment; A refrigerator compartment temperature sensor for sensing a temperature of the refrigerator compartment; A cronus motor operated by the temperature sensed by the freezer compartment temperature sensor and the refrigerating compartment temperature sensor; A circuit portion for operating the synchronous motor; A cold air breaker for regulating the flow of cold air between the freezer compartment and the refrigerating compartment; It consists of a cold air flow path for performing local cooling depending on the hot load input position.

Preferably, the cold air circuit breaker is provided with a blocking film on the drive shaft to be rotatable by the drive of the synchronous motor, the blocking film is rotated by a predetermined angle to supply the cold air flowing into the refrigerating chamber by opening or closing the inlet of the cold air flow path It is characterized by being able to adjust the direction.

In addition, the cold air flow path in the refrigerating chamber is characterized in that it forms a separate passage reaching the branch and the central portion to enable the centralized cooling by the cold air flowing from the freezing chamber.

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

1 and 2, the temperature control apparatus of the refrigerator according to the present invention includes a freezer compartment temperature sensor (r1) (r2) (r3) (r4) for sensing the temperature of the freezer compartment (7); A refrigerator compartment temperature sensor f for sensing a temperature of the refrigerator compartment 1; A synchronous motor (not shown) operated by the temperature sensed by the freezer compartment temperature sensor f and the refrigerator compartment temperature sensors r1, r2, r3, and r4; A circuit section (not shown) for operating the synchronous nut motor; A cold air breaker (11) for regulating the flow of cold air between the freezing chamber (7) and the refrigerating chamber (1); It consists of the cold air flow path 6 for performing local cooling according to a hot load input position.

Preferably, the cold air circuit breaker 11 is provided with a blocking film 11a on the drive shaft so as to be rotatable by the driving of the synchronous motor, and the blocking film 11a is rotated by a predetermined angle so that the cold air flow passage 6 is opened. By opening or closing the it is characterized in that it is possible to adjust the supply direction of the cold air flowing into the refrigerating chamber (1).

In addition, the cold air passage 6 in the refrigerating chamber 1 is divided into the central and the lower end to reach the central portion and the lower end to enable the centralized cooling by the cold air flowing from the freezer (7) and the centralized central cooling path ( And 9).

When the temperature control method of the refrigerator according to the present invention carried out by the above structure described step by step based on the flow chart of FIG.

Compressor operation step (M);

The compressor (not shown) is operated by applying power to the refrigerator. As the compressor operates, a portion of the cold air cooled in the evaporation chamber (not shown) is supplied to the refrigerating chamber 1 while passing through the cold air passage 6 by the rotation of the fan 3 to circulate in the refrigerating chamber 1. Done.

Refrigeration chamber temperature control step (R);

When the temperature of the refrigerating compartment 1 is sensed and the set temperature (3 ° C.) of the refrigerating compartment is exceeded, the cold air breaker 11 rotates the synchronous motor to the full open position. That is, when the cold air flowing into the refrigerating compartment 1 is sensed by the refrigerating compartment temperature sensors r1, r2, r3, and r4, and the temperature of the refrigerating compartment 1 reaches the set temperature (3 ° C.). The compressor is continuously operated until, and when the refrigerating chamber 1 reaches the set temperature, it is determined whether the refrigerator continues to operate by sensing the temperature of the freezing chamber 7. At this time, the cold air circuit breaker 11 is fixed to the deployment position (blocking film rotation angle; θ = 0 ° or θ = 180 °) by the synchronous motor as shown in FIG. Cold air is introduced through 10 to rapidly cool the refrigerating chamber 1.

Freezer compartment temperature control step (F);

When the temperature of the freezer compartment 7 sensed by the freezer compartment sensor f is below the set temperature (-18 ° C), the compressor is stopped. If the set temperature exceeds the set temperature, the synchronous motor is rotated to the fully closed position. . When the set temperature is exceeded, the breaker 11 is fixed to the refrigerating chamber 1 by the synchronous motor at the fully closed position (blocking membrane rotation angle; θ = 90 ° or θ = 270 °) as shown in FIG. 3B. Only the freezing chamber 7 is rapidly cooled by blocking all cold air flow paths 8, 9, and 10 passing through to block cold air.

Cold room intensive cooling step (C);

When a high temperature load, such as hot food, is introduced into the refrigerating compartment 1 and a temperature difference Δr above the allowable value α is generated between the portions, the temperature is high after the temperature Δr is taken into account. The synchronous motor is rotated by a predetermined angle so that the cool air can be supplied to the portion, and only the predetermined cool air flow path is opened until the cooler chamber is kept below the set temperature (3 ° C.). That is, the synchronous motor controlled by the circuit unit is operated to rotate the blocking film 11a of the cold air circuit breaker 11 at a predetermined angle (θ = 60 ° or θ = 300 °) and thus, in the refrigerating chamber 1 through the specific cold air flow path. Only one part can supply cold air.

In particular, the centralized cooling step (C) of the refrigerating compartment (C) is a temperature sensor (r3) and the refrigerating compartment (1) located in the center of the refrigerating compartment (1) when the sensing temperature in the center of the refrigerating compartment (1) is greater than the allowable temperature than the lower end of the refrigerating compartment (1). If the temperature difference Δr between the temperature values detected by the temperature sensor r4 located at the lower end of the c) is greater than the allowable value α, as shown in FIG. 3C, the synchronous is set by a predetermined angle (θ = 60 °). When the sensing temperature of the lower end is greater than the allowable value, the centralized cooling step (C1) that rotates the motor to open only the centralized centralized cooling flow path (8), while the lowered temperature is greater than the allowable value as shown in FIG. Likewise, the synchronous motor is rotated by a predetermined angle (θ = 60 ° or θ = 300 °) to pass through the lower end centralized cooling step (C2), which opens only the lower end centralized cooling flow path (9). Sensing temperature If the temperature difference is within tolerance, it is preferable to ensure that after the refrigerator compartment temperature determine the final step (C3) to make them return to the initialization state operation of the compressor.

The effects of the present invention that can be expected by the configuration and action as described above are as follows.

The temperature control method of the refrigerator and the apparatus according to the present invention follow the existing temperature control method of the reference temperature of the refrigerator compartment, and attach a dedicated temperature sensor to each part of the refrigerator compartment (1) and the freezer compartment (7) and the refrigerator compartment (1) and the freezer compartment. (7) Calculate the temperature difference between the set temperature and each part, and control the cold air circuit breaker 11 accordingly according to the result and preferentially cool the high temperature part that needs to be cooled, so that the operation rate of the refrigerator decreases according to the influence of the ambient temperature. There is no fear that the temperature of the freezer compartment 7 will rise, unnecessary power loss will be prevented, and the cooling capacity of the refrigerating compartment and the product will have a useful effect of improving the reliability and excellent cooling speed due to high temperature load. have.

Claims (5)

A compressor operating step of applying a power to operate the compressor; A refrigerator compartment temperature control step of sensing a refrigerator compartment temperature and rotating the synchronous motor to a deployment position when the refrigerator compartment temperature is exceeded; A freezer compartment temperature control step of detecting a freezer compartment temperature when the refrigerating compartment temperature is less than or equal to the preset temperature, and stopping the operation of the compressor when the freezer compartment temperature is less than or equal to the preset temperature; When the temperature difference between the parts in the refrigerator compartment exceeds the allowable value, when the temperature difference is detected, the synchronous motor is rotated by a predetermined angle to maintain the temperature below the set temperature in the refrigerator compartment so that the cold air can be intensively supplied to the high temperature portion. Refrigerator temperature control method of the refrigerator consisting of a centralized cooling step of opening only a predetermined cold air flow until. The centralized centralized cooling step of claim 1, wherein the centralized cooling step of the refrigerating compartment is configured to rotate the synchronous motor by a predetermined angle to open only the centralized centralized cooling flow path when the sensing temperature of the central part is greater than the allowable temperature than the sensing temperature of the lower part. Wow; A lower end concentrated cooling step of opening the lower end concentrated cooling flow path by rotating the synchronous motor by a predetermined angle when the lower end detected temperature is greater than the allowable temperature; And a final check step of the refrigerating chamber temperature for checking the temperature difference between the center sensing temperature and the lower sensing temperature within an allowable value and returning the compressor to an initializing state of the compressor. A cold stone chamber for sensing the temperature of the freezer compartment; A refrigerator compartment temperature sensor for sensing a temperature of the refrigerator compartment; A synchronous motor operating by the temperature sensed by the freezer compartment temperature sensor and the refrigerating compartment temperature sensor; A circuit portion for operating the synchronous motor; A cold air breaker for regulating the flow of cold air between the freezer compartment and the refrigerating compartment; A temperature control device of a refrigerator composed of a cold air flow path for performing local cooling according to a hot load input position. The cold air breaker of claim 3, wherein the cold air breaker is provided with a blocking film on the drive shaft so as to be rotatable by driving the synchronous motor, and the blocking film is rotated by a predetermined angle so that the cold air flows into the refrigerating chamber by opening or closing the inlet of the cold air flow path. Refrigerator temperature control device, characterized in that to adjust the supply direction of the. The temperature of the refrigerator according to claim 3 or 4, wherein the cold air passage in the refrigerating compartment forms a separate passage reaching the center and the lower end to enable centralized cooling by the cold air flowing from the freezing compartment. Control unit.