KR20070061946A - Refrigerator Control Method - Google Patents

Abstract

The present invention relates to a control method of a refrigerator, comprising: a compressor, a refrigerating compartment, a refrigerating chamber blowing fan, and a refrigerating compartment temperature sensing unit configured to sense a temperature inside the refrigerating compartment, wherein the compressor is stopped. Detecting a first internal temperature of the refrigerating compartment; Accumulating the accumulated stop time of the compressor; Detecting a second internal temperature of the refrigerating compartment at the time when the compressor is driven; Calculating a slope by dividing a difference value between the first internal temperature and the second internal temperature by a cumulative stop time of the compressor; And comparing the calculated slope with the set reference slope to drive the compressor and the refrigerating air blowing fan when the calculated slope is greater than the reference slope. Thereby, the refrigerator which can maintain the constant temperature of a refrigerating compartment constant regardless of the temperature of a freezer compartment is provided.

Description

CONTROLLING METHOD FOR THE REFRIGERATOR}

1 is a schematic view showing a refrigeration cycle of a typical refrigerator,

2 is a block diagram of a refrigerator according to the present invention;

3 is a flowchart of a refrigerator according to the present invention;

4 is a flowchart for setting a reference slope according to the present invention.

Explanation of symbols on the main parts of the drawings

10 refrigeration cycle 11 compressor

12 condenser 13 expansion means

40: refrigerator compartment 41: refrigerator compartment evaporator

43: refrigerator compartment blowing fan 50: freezer

51: freezer compartment evaporator 53: freezer compartment blower fan

47: refrigerator compartment temperature detection unit 57: freezer compartment temperature detection unit

The present invention relates to a control method of a refrigerator, and more particularly, to a refrigerator capable of maintaining a constant temperature of the refrigerator compartment regardless of the temperature and external conditions of the freezer compartment.

Generally, a refrigerator includes a main body having a refrigerating compartment and a freezing compartment for storing articles such as food, a door for opening and closing an opening formed in the refrigerating compartment and a freezing compartment, and a refrigerating apparatus provided in the main body to form a refrigerating cycle for cooling the refrigerating compartment and the freezing compartment. do.

1 is a schematic view showing a refrigeration cycle of a conventional refrigerator, a so-called independent refrigeration cycle having independent evaporators (51, 41) and blowing fans (53, 43) in the freezer compartment (50) and the refrigerating compartment (40), respectively. It is a block diagram which shows (10). Referring to the drawings, the refrigeration cycle 10 of the independent cooling method includes a compressor 11 for compressing a high temperature low pressure refrigerant into a high temperature high pressure refrigerant, a condenser 12 for condensing the compressed refrigerant, and a low temperature high pressure condensation. And expansion means (13) for adiabatic expansion of the refrigerant, and evaporators (51, 41) respectively provided in the freezing chamber (50) and the refrigerating chamber (40) to evaporate the expanded refrigerant to generate cold air.

Referring to the operation of the refrigeration cycle 10 having the above configuration as follows. First, the freezing chamber 50 and the refrigerating chamber 40 are set to maintain a control temperature range having predetermined upper and lower limit temperatures, respectively. When the temperature inside the freezer compartment 50 or the refrigerating compartment 40 is out of the upper limit temperature, the compressor 11 is operated to generate cold air in the evaporator 41. In general, the on / off of the compressor 11 is relatively The free load chamber 50 has a large heat load.

When the compressor 11 is operated under predetermined conditions (for example, when the freezer compartment 50 is above the upper limit temperature or the like), the refrigerating compartment is usually performed simultaneously with the cooling operation of the freezer compartment 50. Therefore, the cooling operation of the refrigerating compartment 40 is performed in many cases simultaneously with the operation of the compressor 11, which simultaneously cools the refrigerating compartment 40 and the freezing compartment 50 by driving one compressor 11, thereby recharging the refrigerating compartment 40. It is to increase the operation safety of the cycle by suppressing the operation of the separate compressor 11 by), and to obtain a constant refrigeration cycle operation pattern.

In the conventional control method of the refrigerator, a method of controlling the compressor 11 and the respective blowing fans 53 and 43 based on the temperature of the freezer compartment 50 has been used. Thus, when the user raises the set temperature of the freezer compartment 50, the refrigerator compartment 40 has a problem of weak cooling. For example, if the user changes the setting of the freezer compartment 50, which is set to minus 30 degrees, the compressor 11 and each blowing fan 53 and 43 have a long rest period, so that the refrigerating chamber 40 is relatively As it can be in a cold state, there may be a problem in the reliability of the product.

Accordingly, an object of the present invention is to provide a refrigerator which can maintain the constant temperature of the refrigerating chamber constantly regardless of the temperature and external conditions of the freezing chamber.

According to the present invention, a refrigerator, a refrigerator compartment, a refrigerator compartment blowing fan, and a refrigerator compartment temperature sensing unit for sensing a temperature inside the refrigerator compartment, according to the present invention, the refrigerator compartment at the time when the compressor is stopped Detecting a first internal temperature of the apparatus; Accumulating the accumulated stop time of the compressor; Detecting a second internal temperature of the refrigerating compartment at the time when the compressor is driven; Calculating a slope by dividing a difference value between the first internal temperature and the second internal temperature by a cumulative stop time of the compressor; And comparing the calculated slope with the set reference slope to drive the compressor and the refrigerating air blowing fan when the calculated slope is greater than the reference slope.

On the other hand, the object is, according to the present invention, in the refrigerator control method comprising a compressor, a refrigerating compartment, a refrigerating chamber blowing fan, and a refrigerating compartment temperature sensing unit for sensing the temperature inside the refrigerating compartment, at the time when the compressor stop Detecting a first internal temperature of the refrigerator compartment; Accumulating the accumulated stop time of the compressor; Detecting a second internal temperature of the refrigerating compartment at the time when the compressor is driven; Calculating a slope by dividing a difference value between the first internal temperature and the second internal temperature by the cumulative stop time of the compressor when the cumulative stop time of the compressor is longer than a predetermined reference stop time; Comparing the calculated slope and the set reference slope may be achieved by including driving the compressor and the refrigerating air blowing fan if the calculated slope is greater than the reference slope.

Here, it is preferable to further include the step of calculating the reference slope compared with the calculated slope.

The calculating of the reference slope includes: detecting a third internal temperature of the refrigerating compartment at the time when the compressor is stopped; Accumulating the accumulated stop time of the compressor; Detecting a fourth internal temperature of the refrigerating compartment at the time when the compressor is driven; And calculating a reference slope by dividing the difference between the third internal temperature and the fourth internal temperature by the cumulative stop time of the compressor.

Here, it is preferable that the reference slope can be reset as necessary. Thus, the refrigerator compartment may be kept at a constant temperature even in various setting states.

Here, the reference slope is preferably set in a cycle before the cycle for calculating the calculated slope.

Here, the reference slope is preferably set to any one of an average value, a maximum value, and a minimum value of a plurality of slopes measured in a plurality of cycles before the cycle for calculating the calculated slope.

Here, it is preferable to further include setting the reference stop time.

Here, the reference stop time is preferably set to any one of an average value, a maximum value, and a minimum value of the stop times of the plurality of compressors measured in a plurality of cycles before the cumulative stop time of the compressor.

The reference stop time is set to a value obtained by adding a predetermined time to any one of an average value, a maximum value, and a minimum value of the stop times of the plurality of compressors measured in a plurality of cycles before the cycle of accumulating the accumulated stop time of the compressor. May be

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

As shown in FIG. 1, the refrigerator according to the present invention includes a storage compartment 40 and 50, a door (not shown) to open and close the storage compartments 40 and 50, and a refrigeration unit to supply cold air to the storage compartments 40 and 50. The cycle 10. In addition, the refrigerator according to the present invention, the temperature sensing unit 47, 57, the storage unit 60, the timer 70, the compressor 11 and the refrigerating chamber for detecting the internal temperature of each storage room (40, 50) And a control unit 100 for controlling the blowing fan 43 according to the condition.

The storage chambers 40 and 50 include a freezing chamber 50 provided at one side of the main body and a refrigerating chamber 40 provided at the other side of the main body.

The refrigeration cycle 10 includes a compressor 11 for compressing a gaseous refrigerant at a high temperature and high pressure, a condenser 12 for condensing the gaseous refrigerant compressed from the compressor 11 to a liquid state, and a low temperature of the liquefied refrigerant. Expansion means (13), such as a capillary tube or expansion valve that converts to a low pressure state, and an evaporator that cools the ambient air by absorbing heat from the ambient air to vaporize the refrigerant liquefied at low temperature and low pressure delivered from the expansion means (13). (41, 51) and blowing fans (43, 53) for supplying air cooled by the evaporators (41, 51) to the storage compartment.

The evaporators 51 and 41 include a freezer compartment evaporator 51 provided to supply cold air to the freezer compartment 50, and a refrigerator compartment evaporator 41 provided to supply cold air to the refrigerating compartment 40.

The blowing fans 53 and 43 include a freezing compartment blowing fan 53 and a refrigerating compartment blowing fan 43 corresponding to the freezing compartment evaporator 51 and the refrigerating compartment evaporator 41, respectively. Accordingly, the refrigerator according to the present invention has independent evaporators 51 and 41 and blower fans 53 and 43 corresponding to the respective storage chambers 40 and 50 to mutually mix the cold air generated from the evaporators 51 and 41. It can be supplied to each of the storage compartments (50, 40) independently.

The temperature detectors 47 and 57 include a freezer compartment temperature detector 57 that detects the internal temperature of each storage compartment 40 and 50 and outputs a detection signal to the controller 100, and a refrigerator compartment temperature detector 47. do. The temperature sensing units 47 and 57 are mounted on the walls of the respective storage chambers 40 and 50 so as to detect the temperature in the storage chambers 40 and 50. The temperature detectors 47 and 57 are connected to the controller 100 to transmit the detected internal temperature to the controller 100. Thus, the control unit 100 determines the operating conditions of the compressor 11 and the refrigerating chamber blowing fan 43 based on the internal temperature transmitted from the temperature sensing units 47 and 57 to determine the compressor 11 and the refrigerating chamber blowing fan 43. ) Can be controlled.

In addition, the refrigerator according to the present invention may further include an operation setting unit (not shown) for setting the operation mode of each storage room (40, 50). An operation setting unit (not shown) may be provided in one door to set an operation mode and temperature of each storage compartment 40 and 50, or may be provided for each door of each storage compartment. The operation setting unit (not shown) may be provided in various ways. For example, the operation setting unit may be provided as a button or may be provided as a touch screen. The operation setting of each of the storage compartments 40 and 50 may be directly set by the user at a temperature such as 0 degrees or -1 degrees, and an operation mode such as strong, medium, or weak may be set by the operation setting unit.

The storage unit 60 is provided to store the temperature and time at each time point controlled by the controller 100, and the timer 70 is provided to measure the stop time of the compressor 11.

The controller 100 controls the first internal temperature T ₁ of the refrigerating compartment 40 at the point in time when the compressor 11 is stopped (t ₁ = 0) and the second of the refrigerating compartment 40 at the time of stopping the compressor 11. the slope (X ₁₎ is based on the slope calculated by comparing the difference value between the internal temperature (t ₂₎ and the cumulative stopping time (t ₁₎ based on the slope (X) previously set to calculate the inclination (X ₁₎ into the compressor If greater than (X), the compressor 11 and the refrigerating chamber blowing fan 43 are driven.

On the other hand, the control unit 100 is the first internal temperature of the refrigerating chamber 40 at the time point (t ₁ = 0) when the compressor 11 is stopped when the compressor stop time (t ₁ ) is longer than the set reference stop time (t). The slope (X ₁ ) is calculated by dividing the difference value between the second internal temperature T ₂ of the refrigerating chamber 40 at the time of stopping the T ₁ and the compressor 11 by the cumulative stopping time t ₁ of the compressor. When the slope X ₁ calculated in comparison with the preset reference slope X is greater than the reference slope X, the compressor 11 and the refrigerating chamber blowing fan 43 may be driven.

Hereinafter, a control method of the refrigerator according to the above-described configuration will be described in detail with reference to the accompanying drawings.

First, it is judged whether or not the compressor 11 is stopped. (S1) Here, if the compressor 11 is stopped, the internal temperature of the refrigerating chamber 40 at the stop time (t ₁ = 0) of the compressor 11 (S3). The first internal temperature T ₁ is stored and stored. (S5) After the compressor 11 is driven, the compressor stop time t ₁ is accumulated. (S7) Then, the timing at which the compressor is driven is determined. S9) Here, the internal temperature of the refrigerator compartment 40 is sensed at the time when the compressor stops, and the second internal temperature T ₂ is stored. (S11) Here, the reference stop time at which the compressor stop time t ₁ is set. When longer than (t) (S13), the difference between the first internal temperature T ₁ and the second internal temperature T ₂ stored above is divided by the compressor stop time t ₁ and the slope (X ₁ = (T _2- T ₁ ) / t ₁ )) is calculated (S15). The calculated slope X ₁ is compared with the preset reference slope X. (S17) The calculated slope X ₁ and the reference are calculated. The slope (X ₁ ) calculated by comparing the slope (X) is If larger, the compressor 11 and the refrigerating chamber blowing fan 43 are driven. (S19)

Here, step S13 may be omitted.

Here, the process of setting the reference slope X will be described in detail with reference to the drawings.

It is determined whether the compressor 11 and the freezing compartment blowing fan 53 are stopped. (S100) The internal temperature of the refrigerating compartment 40 is sensed at a time S110 at which the compressor 11 and the freezing compartment blowing fan 53 are stopped. The third internal temperature T ₃ is stored. (S120) Here, the compressor 11 and the freezing chamber blowing fan 53 accumulate and store the elapsed time from the stop point (t ₂ = 0). Then, it is determined whether the compressor 11 and the freezer compartment blower fan 53 are driven (S140). Here, the inside of the refrigerator compartment 40 at the time when the compressor 11 and the freezer compartment blower fan 53 are driven. The temperature is sensed and the fourth internal temperature T ₄ is stored. The difference between the third internal temperature T ₃ and the fourth internal temperature T ₄ stored above is stored in the compressor 11 and the freezer compartment blowing. The reference slope X is calculated by dividing by the time from when the fan 53 is stopped to the time when the compressor 11 and the freezing compartment blowing fan 53 are driven.

On the other hand, the reference slope (X) may be preset as a standard in the above-described procedure, or may be continuously updated and reset according to the situation. Here, when continuously updating and resetting the reference slope X, the reference slope X is preferably set in a cycle before the cycle for calculating the calculated slope X ₁ . Here, the reference slope X may be set by averaging a plurality of slopes set in a cycle before the cycle for calculating the calculated slope X ₁ . In addition, the reference slope X may be set to a maximum value or a minimum value among a plurality of slopes set in a cycle earlier than the cycle for calculating the calculated slope X ₁ .

As a matter of course, the reference stop time t may be set by averaging a plurality of compressor stop times accumulated in a cycle before the cycle for calculating the calculated slope X ₁ . In addition, the reference stop time t may be set to a maximum value or a minimum value of a plurality of compressor stop times accumulated in a cycle before the cycle for calculating the calculated slope X ₁ .

) 더한 값으로 설정될 수도 있음은 물론이다. 여기서, 소정 시간(

) 은 설정하기 나름으로 10분으로 설정될 수도 있고, 30분으로 설정될 수도 있다. Here, of course, the reference stop time t may be set by averaging a plurality of compressor stop times accumulated in cycles earlier than the cycle for calculating the calculated slope X ₁ . In addition, the reference stop time (t) is a predetermined time (at a maximum or minimum value of a plurality of compressor stop times integrated in a cycle before the cycle for calculating the calculated slope (X ₁ )).

Of course, it can also be set to a value. Where a predetermined time (

) May be set to 10 minutes or 30 minutes.

As a result, the refrigerator according to the present invention can maintain the constant temperature of the refrigerating compartment by driving the compressor and the refrigerating compartment blowing fan by determining the inclination of the refrigerating compartment regardless of the freezer compartment and external conditions.

As described above, according to the present invention, it is possible to provide a refrigerator and a control method thereof capable of maintaining the constant temperature of the refrigerating compartment constantly regardless of the temperature and external conditions of the freezer compartment.

Claims (10)

A control method of a refrigerator comprising a compressor, a refrigerating compartment, a refrigerating chamber blowing fan, and a refrigerating compartment temperature sensing unit configured to sense a temperature inside the refrigerating compartment, Detecting a first internal temperature of the refrigerating compartment at the time when the compressor is stopped; Accumulating the accumulated stop time of the compressor; Detecting a second internal temperature of the refrigerating compartment at the time when the compressor is driven; Calculating a slope by dividing a difference value between the first internal temperature and the second internal temperature by a cumulative stop time of the compressor; And controlling the compressor and the refrigerating air blowing fan when the calculated slope is greater than the reference slope by comparing the calculated slope with the set reference slope. A control method of a refrigerator comprising a compressor, a refrigerating compartment, a refrigerating chamber blowing fan, and a refrigerating compartment temperature sensing unit configured to sense a temperature inside the refrigerating compartment, Detecting a first internal temperature of the refrigerating compartment at the time when the compressor is stopped; Accumulating the accumulated stop time of the compressor; Detecting a second internal temperature of the refrigerating compartment at the time when the compressor is driven; Calculating a slope by dividing a difference value between the first internal temperature and the second internal temperature by the cumulative stop time of the compressor when the cumulative stop time of the compressor is longer than a predetermined reference stop time; And comparing the calculated slope with the set reference slope to drive the compressor and the refrigerating air blowing fan when the calculated slope is greater than the reference slope. The method according to claim 1 or 2, And setting the reference slope compared with the calculated slope. The method of claim 3, Setting the reference slope, Detecting a third internal temperature of the refrigerating compartment at the time when the compressor is stopped; Accumulating the accumulated stop time of the compressor; Detecting a fourth internal temperature of the refrigerating compartment at the time when the compressor is driven; And calculating a reference slope by dividing a difference value between the third internal temperature and the fourth internal temperature by a cumulative stop time of the compressor. The method of claim 3, The control method of the refrigerator, characterized in that the reference slope can be reset as necessary. The method of claim 3, The reference slope is a control method of a refrigerator, characterized in that set in a cycle before the cycle for calculating the calculated slope. The method of claim 3, And the reference slope is set to any one of an average value, a maximum value, and a minimum value of a plurality of slopes measured in a plurality of cycles before the cycle for calculating the calculated slope. The method of claim 2, The control method of the refrigerator further comprising the step of setting the reference stop time. The method of claim 8, The reference stop time is a control method of a refrigerator, characterized in that set to any one of the average value, the maximum value and the minimum value of the stop time of the plurality of compressors measured in a plurality of cycles prior to the cumulative stop time of the compressor. . The method of claim 8, The reference stop time is set to a value obtained by adding a predetermined time to any one of an average value, a maximum value, and a minimum value of the stop time of the plurality of compressors measured in a plurality of cycles before the cycle of accumulating the accumulated stop time of the compressor. Control method of the refrigerator.

Images