KR20040013595A - Clockwise/counterclockwise compressor driving control apparatus and method for refrigerator - Google Patents

Abstract

PURPOSE: An apparatus and a method for controlling operation of a clockwise/counterclockwise compressor of a refrigerator are provided to prevent deterioration of working efficiency of the refrigerator due to wrong operation of the compressor by determining whether the compressor works accurately based on comparison between electric current impressed to the compressor and electric current preset by test. CONSTITUTION: An apparatus includes a current detecting part(12) detecting current impressed to a compressor; a temperature sensing part(13) sensing temperature in a refrigerator; a microcomputer(14) outputting operation control signal for the compressor depending on indoor temperature detected by the temperature sensing part, and outputting operation control signal for the compressor corresponding with comparison between electric current value detected by the current detecting part and reference current value; and a clockwise/counterclockwise direction signal generating part(11) generating clockwise direction signal or counterclockwise direction rotating signal depending on operation control signal of the microcomputer to impress to the compressor.

Description

Refrigeration forward / reverse compressor operation control device and method {CLOCKWISE / COUNTERCLOCKWISE COMPRESSOR DRIVING CONTROL APPARATUS AND METHOD FOR REFRIGERATOR}

The present invention relates to a refrigerator employing a forward / reverse compressor. In particular, the present invention compares a current value applied to a compressor with a preset current value by experiment to determine whether the current compressor operates correctly, thereby operating the refrigerator according to a malfunction of the compressor. The present invention relates to a forward / reverse compressor operation control apparatus and a method for preventing a deterioration in efficiency.

In general, in the case of a refrigeration cycle applied to the refrigerator, it is divided into a high cold cycle for supplying cold air in the freezer compartment and a low cold cycle for supplying cold air in the refrigerating compartment.

In this case, the high-cooling refrigeration cycle or low-cold-freezing cycle, the length of the expansion means does not implement the optimal refrigeration cycle according to the operation mode, will be described with reference to the accompanying drawings.

1 is a schematic view showing a refrigerating cycle of a typical refrigerator, as shown in FIG. 1, a compressor (1) which makes high-temperature, high-pressure steam by sucking and compressing a low-temperature, low-pressure refrigerant vapor discharged from an evaporator; A condenser (2) for dissipating the heat of the high-temperature, high-pressure refrigerant vapor discharged from the compressor (1) into water or air, and converting it into a high-pressure saturated liquid; The first evaporator (F-EVA) which sucks the high pressure saturated liquid discharged from the condenser 2 into the refrigerant of low temperature and low pressure through the capillary tube 3, evaporates it, and heats it into a freezing chamber to discharge cold air. )Wow; A second evaporator (R-EVA) which sucks the high pressure saturated liquid discharged from the condenser 2 into the refrigerant having low temperature and low pressure through the capillary tube 3 and evaporates it, and heats it into a refrigerating chamber to discharge cold air. It will be described, such a freezing cycle will be described.

First, in the freezing operation (high cooling operation), the high temperature and high pressure refrigerant compressed by the compressor 1 flows into the condenser 2, condenses, and passes through the capillary tube 3 to become a low temperature low pressure refrigerant.

Thereafter, the first evaporator (F-EVA) sucks the low-temperature low-pressure refrigerant and evaporates it, and discharges saturated steam without liquid to the freezer compartment.

In the cold storage operation (low cooling power operation), the high temperature and high pressure refrigerant compressed by the compressor 1 flows into the condenser 2, condenses, and passes through the capillary tube 3 to become a low temperature low pressure refrigerant.

Thereafter, the second evaporator (R-EVA) inhales and evaporates the low temperature and low pressure refrigerant, and heats it into a freezer compartment to discharge cold air.

Here, the compressor employed in the above-mentioned refrigeration cycle of the refrigerator rotates only in the forward direction and always generates a high output. Accordingly, even when the temperature in the refrigerator is kept stable and a large cooling force is not required, the compressor is rotated forward. There is a problem that the power consumption is increased because it rotates.

In order to solve this problem, the refrigerator employs a compressor that rotates in a forward or reverse direction according to the cooling power, and generates a cooling force, thereby reducing power consumption. That is, the refrigerator is recognized as a stable state after a certain operating point. This reduces power consumption by driving the compressor in the reverse direction to generate a small cooling force.

However, in the above-described apparatus, in controlling the compressor to rotate forward or reverse, it is not possible to confirm whether the compressor is operated in a precisely controlled direction, and thus it is not possible to prevent a decrease in efficiency of the refrigerator due to malfunction of the compressor. There is this.

The present invention has been made to solve the above problems, and it is determined whether the current compressor is operating correctly by comparing the current value applied to the compressor with a preset current value by experiment, the operation efficiency of the refrigerator according to the malfunction of the compressor It is an object of the present invention to provide a forward and reverse compressor operation control apparatus and method for preventing a deterioration in advance.

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

Figure 2 is a block diagram showing the configuration of the forward / reverse rotation compressor operation control apparatus of the present invention refrigerator.

Figure 3 is a flow chart for the operation control method of the forward / reverse rotation compressor of the present invention refrigerator.

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

10: power supply unit 11: forward / reverse rotation signal generation unit

12: current detection unit 13: temperature detection unit

14: microcomputer

In order to achieve the above object, the present invention provides a refrigerator employing a compressor capable of forward / reverse rotation, comprising: a current detector for detecting a current applied to the compressor; A temperature sensing unit sensing a temperature in the refrigerator; A microcomputer outputting a compressor operation control signal according to the high temperature detected by the temperature detection unit, comparing the current value detected by the current detection unit with a reference current value, and outputting a compressor operation control signal accordingly; It characterized in that it comprises a forward / reverse rotation signal generator for generating a forward rotation signal or a reverse rotation signal to the compressor by the operation control signal of the microcomputer.

The present invention for achieving the above object, in the refrigerator employing a compressor capable of forward / reverse rotation, while operating the compressor of the refrigerator by the user, by detecting the temperature in the refrigerator and forward rotation according to the temperature in the refrigerator Or a first step of selecting reverse rotation; A second step of detecting a current value applied to the compressor during forward rotation operation and comparing the detected current value with a reference current value; A third step of, if the detected current value is greater than the reference current value, continues to operate the compressor forward and if the detected current value is less than the reference current value, turning off the compressor; A fourth step of detecting a current value applied to the compressor during the reverse rotation operation and comparing the detected current value with a reference current value; As a result of the comparison of the fourth process, if the detected current value is smaller than the reference current value, the compressor is continuously operated in reverse rotation, and if the detected current value is greater than the reference current value, the compressor is performed as a fifth process of turning off the compressor.

Hereinafter, operations and effects of the forward and reverse rotation compressor operation control apparatus and method of the refrigerator according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 is a block diagram showing the configuration of the forward / reverse compressor operation control apparatus of the refrigerator according to the present invention, as shown in the figure; A temperature sensing unit 13 for sensing a temperature in the refrigerator; The microcomputer outputs a compressor operation control signal according to the internal temperature detected by the temperature detection unit 13, compares the current value detected by the current detection unit 12 with a reference current value, and outputs a compressor operation control signal accordingly. 14; A forward / reverse signal generator 11 for generating a forward rotation signal or a reverse rotation signal to the compressor by the operation control signal of the microcomputer 14 is provided.

FIG. 3 is a flowchart illustrating a method of controlling a forward / reverse compressor operation of a refrigerator according to the present invention. As shown in FIG. 3, a user operates a compressor of a refrigerator and detects a temperature in the refrigerator and rotates it according to the temperature inside the refrigerator. Or first steps SP1 to SP4 for selecting reverse rotation; Second steps (SP5, SP6) for detecting a current value applied to the compressor during forward rotation operation and comparing the detected current value with a reference current value; A third step (SP7, SP8) of continuously turning the compressor forward if the detected current value is larger than the reference current value and turning off the compressor if the detected current value is smaller than the reference current value as a result of the comparison of the second step; A fourth process (SP9, SP10) for detecting the current value applied to the compressor during the reverse rotation operation and comparing the detected current value with the reference current value; As a result of the comparison of the fourth process, if the detected current value is smaller than the reference current value, the compressor is continuously operated in reverse rotation, and if the detected current value is greater than the reference current value, the compressor is turned into fifth processes SP11 and SP12. The same operation of the present invention will be described.

First, when the operation mode of the refrigerator is selected by the user, the compressor of the refrigerator is operated, and the temperature detector 13 detects the temperature in the refrigerator and applies the temperature detection signal accordingly to the microcomputer 14.

Accordingly, the microcomputer 14 outputs an operation control signal for forward rotation of the compressor when the temperature in the refrigerator is greater than the predetermined temperature, and reversely rotates the compressor when the temperature in the refrigerator is less than the predetermined temperature. Output the operation control signal.

Accordingly, the forward / reverse rotation signal generation unit 11 rotates the compressor forward or reverse by the operation control signal of the microcomputer 14.

At this time, the current detector 12 detects the current applied to the compressor and applies it to the microcomputer 14, the microcomputer 14 compares the detected current value and the reference current value according to the current operating state of the compressor, It detects whether an error occurs in the operation direction of the compressor and keeps the compressor running in the current operation state or turns off the compressor.

At this time, the reference current value is set to about 0.6A.

In more detail, the present invention will be described with reference to FIG. 3. First, the user senses the temperature in the refrigerator while operating the compressor of the refrigerator, and selects the forward rotation or the reverse rotation according to the internal temperature of the refrigerator (SP1 to SP). SP4),

If the current compressor is running at the forward rotation, the current value applied to the compressor is detected and the detected current value is compared with the reference current value (SP5, SP6),

As a result of the comparison, if the detected current value is larger than the reference current value, it is recognized that there is no error in the current compressor operation direction, and thereby the compressor is continuously rotated forward (SP7), and if the detected current value is smaller than the reference current value, Recognizing that an error has occurred in the driving direction, the compressor is turned off (SP8).

On the other hand, when the compressor currently operates in reverse rotation, the current value applied to the compressor is detected and the detected current value is compared with the reference current value (SP9, SP10).

As a result of the comparison, if the detected current value is smaller than the reference current value, it is recognized that there is no error in the current compressor operation direction, and thereby the compressor continues to run in reverse rotation, and if the detected current value is larger than the reference current value, Recognize that an error has occurred, and turn off the compressor (SP11, SP12).

In other words, in the present invention, when the rotational direction of the compressor is determined and operated by the temperature in the refrigerator, the compressor is determined by comparing the current value applied to the compressor with the reference current value to determine whether the current operation direction of the compressor is properly operated. Make it work without error.

As described in detail above, the present invention is to determine whether the current compressor is operating correctly according to the operation direction of the compressor determined according to the temperature in the refrigerator by comparing the current value applied to the compressor with the current value preset by the experiment, The operation efficiency of the refrigerator due to malfunction of the compressor is prevented in advance.

Claims (4)

In the refrigerator employing a compressor capable of forward / reverse rotation, A current detector for detecting a current applied to the compressor; A temperature sensing unit sensing a temperature in the refrigerator; A microcomputer outputting a compressor operation control signal according to the high temperature detected by the temperature detection unit, comparing the current value detected by the current detection unit with a reference current value (0.6A), and outputting a compressor operation control signal accordingly; And a forward / reverse rotation signal generator configured to generate a forward rotation signal or a reverse rotation signal to the compressor by the operation control signal of the microcomputer. The method of claim 1, wherein the microcomputer, In the forward rotation operation, if the detected current value is larger than the reference current value (0.6A), an operation control signal for forward rotation of the compressor is output. If the detected current value is smaller than the reference current value (0.6A), the operation for turning off the compressor is performed. A forward / reverse compressor operation control apparatus for a refrigerator, characterized by outputting a control signal. The method of claim 1, wherein the microcomputer, In the reverse rotation operation, if the detected current value is larger than the reference current value (0.6A), an operation control signal for turning off the compressor is output. If the detected current value is smaller than the reference current value (0.6A), the A forward / reverse compressor operation control device for a refrigerator, characterized by outputting an operation control signal. In the refrigerator employing a compressor capable of forward / reverse rotation, A first step of detecting a temperature in the refrigerator and selecting forward rotation or reverse rotation by the user while operating the compressor of the refrigerator; A second step of detecting a current value applied to the compressor during forward rotation operation and comparing the detected current value with a reference current value 0.6A; As a result of the comparison of the second process, if the detected current value is larger than the reference current value (0.6A), the compressor continues to rotate forward, and if the detected current value is smaller than the reference current value (0.6A), the third process of turning off the compressor; ; A fourth step of detecting a current value applied to the compressor during the reverse rotation operation and comparing the detected current value with the reference current value 0.6A; As a result of the comparison of the fourth process, if the detected current value is smaller than the reference current value (0.6A), the compressor is continuously operated in reverse rotation, and if the detected current value is larger than the reference current value (0.6A), the process is performed as a fifth process of turning off the compressor. Forward / reverse compressor operation control method of the refrigerator characterized in that.