KR100191536B1 - Compressor controlling apparatus and its method of a refrigerator - Google Patents

Abstract

The present invention relates to a compressor control apparatus and a method of a refrigerator, and includes a storage compartment consisting of a refrigerating compartment and a freezing compartment 22, a compressor 56 for compressing a refrigerant, and installed in the storage compartments 22 and 24, respectively. A refrigerator comprising: an evaporator (26, 40) for heat exchange with cold, and a fan (30, 44) for supplying cold air heat exchanged by the evaporators (26, 40) to the storage chamber (22, 24), the compressor Control means 130 for controlling the input voltage of the compressor 56 in accordance with the operating state of the fan (30, 44) changes when the drive (56), and the compressor (56) under the control of the control means 130 ) And the compressor driving means 150 for varying the input voltage of the compressor 56 by phase control, and the compressor 56 is controlled through phase control at the point where the refrigerator compartment fan 44 is turned off in the on state of the compressor 56. By controlling the voltage input to the) it can drive the compressor 56 at the optimum efficiency.

Description

Compressor controller and method of refrigerator

The present invention relates to a refrigerator having an evaporator and a fan in a freezer compartment and a refrigerating compartment, respectively, and more particularly, to a compressor control apparatus and a method of a refrigerator for varying an input voltage of an induction motor (hereinafter referred to as a compressor) during load fluctuation.

In general, a refrigerator for efficiently controlling the freezer compartment and the refrigerating compartment by installing an evaporator and a fan in the freezer compartment and the refrigerating compartment, respectively, is divided into upper and lower portions by the intermediate wall member 21 in the main body 20. Freezer compartments and refrigerating chambers 22 and 24 for storing food are formed, and doors 22a and 24a for opening and closing the freezer compartment and the refrigerating chambers 22 and 24 are mounted on the front surface of the main body 20, respectively.

Here, the freezer compartment 22 and the refrigerating compartment 24 constitute a storage compartment.

The freezer compartment 22 is equipped with a freezer compartment evaporator 26 for exchanging the blown air to cold air, that is, cold air by latent heat of evaporation of the refrigerant, and above the freezer compartment evaporator 26. A freezer compartment fan 30 that rotates in accordance with the operation of the freezer compartment fan motor 28 is mounted to circulate the cold air heat exchanged by the evaporator 26 to the freezer compartment 22.

On the left side of the freezer compartment evaporator 26, the cold guide heat exchanged by the freezer compartment evaporator 26 guides the flow of cold air to be circulated into the freezer compartment 22 by the rotational force of the freezer compartment fan 30. The first duct member 32 is mounted, and the cold air guided along the first duct member 32 by heat exchange by the freezer compartment evaporator 26 is attached to the rear wall of the freezer compartment 22. The cold air discharge port 32a is formed to discharge into the inside.

Under the freezer compartment evaporator 26, the air blown by the freezer compartment fan 30 is cooled by heat exchanged by the latent heat of evaporation of the refrigerant in the freezer compartment evaporator 26 to cool the air. A freezer compartment heater 33 generating heat is mounted on the lower side of the freezer compartment evaporator 26 so as to perform a defrosting operation to remove dew (frost) formed on the freezer compartment evaporator 26.

The lower side of the freezer compartment evaporator 26 provides moisture in the air generated when the air blown in accordance with the operation of the freezer compartment fan 30 is cooled by heat exchange in the freezer compartment evaporator 26. The freezing chamber fan, which is collected at a place and drained to the evaporating dish 54 installed at the lower end of the main body 20 through the drain hose 52, is mounted on the freezing chamber fan. On the left side of the 30 is mounted a thermistor 36 for detecting the internal temperature Tf of the freezer compartment 22.

In addition, the rear side of the refrigerating chamber 24 is equipped with a refrigerator compartment evaporator 40 for exchanging the blown air to cool air, that is, cold by the latent heat of evaporation of the refrigerant, the upper side of the refrigerator compartment evaporator 40 The refrigerator compartment fan 44 which rotates in response to the drive of the refrigerator compartment fan motor 42 is circulated so that the cold air heat-exchanged by the refrigerator compartment evaporator 40 may be circulated to the refrigerator compartment 24.

On the left side of the refrigerator compartment evaporator 40, a second duct for guiding the flow of cold air to circulate the cold air heat exchanged by the refrigerator compartment evaporator 40 into the refrigerator compartment 24 by the rotational force of the refrigerator compartment fan 44. The member 46 is mounted and heat exchanged by the refrigerator compartment evaporator 40 to the rear wall of the refrigerator compartment 24 to discharge the cold air guided along the second duct member 46 into the refrigerator compartment 24. The cold air discharge port 46a is formed so that it may become free.

The air blown by the refrigerating chamber fan 44 is cooled by heat discharged by the latent heat of evaporation of the refrigerant in the refrigerating chamber evaporator 40 to cool the air discharged to the outside under the refrigerating chamber evaporator 40. A refrigerating chamber heater 47 that generates heat is mounted on the lower side of the refrigerating chamber evaporator 40 so as to perform a defrosting operation for removing dew (frost) formed on the refrigerating chamber evaporator 40.

In addition, the lower side of the refrigerating chamber evaporator 40, the moisture in the air generated when the air blown in accordance with the operation of the refrigerating chamber fan 44 by the heat exchange in the refrigerating chamber evaporator 40, that is, defrost water Is collected in one place and the evaporating water receiving 48 for draining through the drain hose 52 to the evaporation plate 54 installed at the lower end of the main body 20 is mounted, the lower portion of the refrigerating chamber 24 is generally lower On the left side of the refrigerator compartment evaporator 40, a thermistor 50 for detecting the internal temperature Tr of the refrigerator compartment 24 is mounted.

At the lower end of the main body 20, a compressor 56 for compressing the low temperature low pressure gas refrigerant cooled in the freezer compartment and the refrigerating chamber evaporators 26 and 40 into a high temperature and high pressure gas state is installed. The main condenser (58) which heats the gas refrigerant of the high temperature and high pressure compressed by the compressor (56) by means of natural convection or forced convection with external air, forcibly cools and liquefies the liquid refrigerant with low temperature and high pressure. It is installed.

In the drawing, an auxiliary condenser 60 for evaporating the defrost water collected in the evaporation plate 54 is mounted at the lower end of the evaporation plate 54, and the inside of the freezing chamber 22 and the refrigerating chamber 24 is internal. A plurality of shelf members 62 are mounted to partition the space into compartments to support the stored food.

In the conventional refrigerator configured as described above, when the user operates a key switch (not shown) to set the internal temperature of the freezer compartment 22 and the refrigerating compartment 24 and then powers on the refrigerator, the freezer compartment 22 and the refrigerating compartment 24 are operated. The internal temperature of the thermistor (36,50) freezer compartment 22 and the refrigerating compartment (24) mounted at a predetermined position of the sensor is sensed to determine whether the detected internal temperature is above the set temperature.

As a result of the determination, if the internal temperature of the freezing chamber 22 or the refrigerating chamber 24 is equal to or higher than the set temperature, the drive relay of the compressor 56 is turned on to apply an AC voltage of 220V to the compressor 56, so that the compressor 56 In this case, when the internal temperature of the freezer compartment 22 is higher than the set temperature, only the freezing chamber fan 30 is turned on. When the internal temperature of the refrigerator compartment 24 is higher than the preset temperature, only the refrigerator compartment fan 44 is turned on. When the inside temperature of the refrigerating compartment 24 is all higher than or equal to the set temperature, the freezer compartment 30 and the refrigerating compartment fan 44 are turned on at the same time to efficiently cool the freezer compartment 22 and the refrigerating compartment 24.

As described above, when the compressor 56, the freezer compartment fan 30, and the refrigerating compartment fan 42 are driven, the refrigerant compressed by gas of high temperature and high pressure by the compressor 56 passes through the auxiliary condenser 60 while being evaporated. The defrost water collected at (54) is evaporated, and the refrigerant passing through the auxiliary condenser (60) is introduced into the main condenser (58), and is heat-exchanged by natural convection or forced convection with external air to cool with a low temperature and high pressure refrigerant. And liquefy.

The low temperature and high pressure liquid refrigerant liquefied in the main condenser (58) is pressurized with a low-temperature low-pressure free refrigerant which is easy to evaporate while passing through the capillary tube 57 to swell to the evaporation pressure, the freezer evaporator 26 and the refrigerator compartment evaporator (40). Flows into).

Therefore, in the freezer compartment and the refrigerating chamber evaporators 26 and 40, the low-temperature low-pressure free refrigerant depressurized in the capillary tube 57 evaporates while passing through a plurality of pipes, and heats the high-air air with cold air (cold air). The low-temperature, low-pressure gas refrigerant cooled in the freezer compartment and the refrigerator compartment evaporators 26 and 40 is sucked into the compressor 56 again to form a repetitive freezing cycle, as shown in FIG. 2.

Accordingly, the cold air heat exchanged by the freezer compartment and refrigerator compartment evaporators 26 and 40 is formed along the first and second duct members 32 and 46 by the rotational force of the freezer compartment fan 30 and the refrigerating compartment fan 44. The freezing chamber 22 and the refrigerating chamber 24 are cooled by being guided and discharged into the freezing chamber 22 and the refrigerating chamber 24 through the cold air discharge ports 32a and 46a.

At this time, when a predetermined time elapses due to the cold air discharged through the cold air discharge ports 32a and 46a, the internal temperatures of the freezer compartment 22 and the refrigerating chamber 24 gradually begin to drop, and when the set temperature is reached, the freezer compartment ( 22) or by turning off the freezing chamber fan 30 and the refrigerating chamber fan 44 according to the temperature condition of the refrigerating chamber 24, turning off the compressor 56 driving relay to cut off the AC voltage of 220V input to the compressor 56. The compressor 56 is turned off.

By the way, in this way, although the load applied to the compressor 56 fluctuates according to the control temperature of the inside temperature of the freezer compartment 30 and the refrigerating compartment fan 30 and the refrigerating compartment fan 44, it is not always constant, but the inside temperature of a high rises, When the compressor is turned on, the compressor 56 is driven, and when the high temperature decreases, the relay is turned off to stop the compressor 56. Therefore, there is a problem that the efficiency of the compressor 56 decreases during load fluctuation.

That is, when the freezer compartment fan 30 and the refrigerating compartment fan 44 are both turned on when the compressor 56 is driven, the input current of the compressor 56 and the freezer compartment fan 30 are turned on and the refrigerating compartment fan 44 is turned off. It can be seen that the input current of the compressor 56 at this time was varied as shown in FIG.

FIG. 3 shows the current input to the compressor for one cycle of on / off of the compressor. In part A of FIG. 3, the compressor 56 is gradually stabilized after the inrush current occurs during initial driving. The compressor 56, the freezer compartment fan 30, and the refrigerating compartment fan 44 are turned on.

Thereafter, the temperature of the refrigerating compartment 24 first reaches the set temperature, and the refrigerating compartment fan 44 is turned off, and the compressor 56 is turned on in part B of FIG. 3 in which the compressor 56 and the freezing compartment fan 30 are on. It can be seen that the current consumption of the compressor 56 is reduced at the point where the refrigerating compartment fan 44 is turned off, and since the refrigerating compartment fan 44 is off, the refrigerant passing through the refrigerating compartment evaporator 40 is frozen. This is because the load of the compressor 56 is reduced by being delivered to the practical evaporator 26.

This indicates that the maximum efficiency point of the compressor 56 is changed to the point where the load of the compressor 56 is changed. However, the conventional compressor control does not reduce power consumption because only the on / off control is performed regardless of the load variation. .

Therefore, the present invention has been made to solve the above problems, and the power consumption is driven by controlling the voltage input to the compressor through the phase control at the point where the refrigerator compartment fan is turned off in the on state of the compressor to drive the compressor at the optimum efficiency. It is an object of the present invention to provide a compressor control apparatus and a method of the refrigerator that can reduce the cost.

In order to achieve the above object, a compressor control apparatus of a refrigerator according to the present invention includes a storage compartment consisting of a refrigerating compartment and a freezing compartment, a compressor for compressing a refrigerant at high temperature and high pressure, and installed in the storage compartment, respectively, to exchange heat in the storage compartment with cold air. A refrigerator having an evaporator and a fan disposed in close proximity to the evaporator to supply the cold air heat exchanged by the evaporator to the storage compartment, the refrigerator being input to the compressor according to an operation state of the fan which is changed when the compressor is driven. And control means for controlling the voltage to be controlled, and compressor driving means for varying a voltage input to the compressor by phase controlling the compressor according to the control of the control means.

In addition, the compressor control method of the refrigerator according to the present invention is a refrigerator control method for supplying cold air to the storage compartment in accordance with the operation of the fan installed in each of the storage compartment consisting of a freezer compartment and a refrigerating compartment to control the internal temperature to a set temperature, the storage compartment A compressor operation determining step of determining a driving condition of the compressor on the basis of the internal temperature and the set temperature of the compressor; and a fan operation determining step by comparing the internal temperatures of the freezer compartment and the refrigerating compartment with the set temperature, respectively, if the compressor is a driving condition. And a voltage control step of controlling an input voltage for determining a driving condition of the freezing compartment fan and the refrigerating compartment fan of the compressor by phase-controlling the compressor according to the operating states of the freezing compartment fan and the refrigerating compartment fan at the time of driving.

1 is a longitudinal sectional view of a typical refrigerator.

2 is a refrigeration cycle of a typical refrigerator.

3 is a graph showing the input current for the on / off cycle of the compressor.

4 is a control block diagram of a compressor control apparatus of a refrigerator according to one embodiment of the present invention.

5A and 5B are flowcharts showing a compressor control operation procedure of the refrigerator according to the present invention.

* Explanation of symbols for main parts of the drawings

26: evaporator for freezer 28: freezer fan motor

30: freezer compartment fan 33: freezer compartment heater

40: refrigerator compartment evaporator 42: refrigerator compartment fan motor

44: refrigerator compartment fan 47: refrigerator compartment heater

56 compressor 58 main condenser

100: DC power supply means 110: temperature control means

112: freezer compartment temperature control unit 114: refrigerator compartment temperature control unit

120: temperature detection means 122: freezer compartment temperature detection unit

124: refrigerator compartment temperature detection unit 130: control means

140: heater driving means 142: first heater driving unit

144: second heater driving unit 150: compressor driving means

160: fan motor driving means 162: first fan motor driving unit

164: second fan motor drive unit

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

Since the refrigerator according to the present invention is the same as the conventional configuration shown in FIGS.

As shown in FIG. 4, the power supply means 100 converts a power supply voltage of a commercial AC power input from an AC power supply terminal (not shown) into a predetermined DC voltage required for driving the refrigerator, and supplies it to each driving circuit.

Temperature control means 110 is a key switch for setting the internal temperature (Tfs, Trs) of the refrigerator desired by the user, the temperature control means 110 at the same time setting the internal temperature (Tfs) of the freezer compartment 22 It consists of a freezer compartment temperature control unit 112 for selecting a rapid freezing operation, and a refrigerating compartment temperature control unit 114 for selecting a rapid refrigeration operation at the same time as setting the internal temperature Trs of the refrigerating chamber 24.

In addition, the temperature detecting unit 120 controls the inside temperature at a temperature set by the user by the temperature adjusting means 110 to detect the inside temperature (Tf, Tr) of the refrigerator to perform a cooling operation of the refrigerator. In this case, the temperature detecting means 120 includes a freezer compartment temperature detecting unit 122 made of a thermistor 36 and the like to sense the internal temperature Tf of the freezer compartment 22, and the internal temperature of the refrigerator compartment 24. It consists of a refrigerator compartment temperature detection unit 124 made of a thermistor (50) to detect Tr.

The control unit 130 receives the DC voltage supplied from the power supply unit 100 to initialize the refrigerator, as well as the temperature of the freezer compartment and the refrigerating chamber 22 and 24 set by the temperature control unit 110. A microcomputer that controls the overall operation of the refrigerator in accordance with Tfs, Trs. The control means 130 is input to the compressor 56 according to the operating conditions of the freezer compartment 30 and the refrigerating compartment fan 44. By varying the voltage, the optimum operation of the compressor 56 is controlled according to the load variation.

In addition, the heater driving means 140 of the freezer compartment and the refrigerating chamber evaporators 26, 40 of the control means 130 according to the driving time of the compressor 56, the freezer compartment fan 30 and the refrigerating compartment fan 44. If it is determined that the defrost condition, by receiving the control signal output from the control means 130 to remove the frost formed on the freezer and refrigerator compartment evaporators (26, 40) by driving control of the heater (33, 47) The heater driving means 140 receives a control signal output from the control means 130 to freeze the heater installed below the freezer compartment evaporator 26 to remove frost formed on the freezer compartment evaporator 26 ( The first heater driving unit 142 for driving control of the 33 and the control signal output from the control means 130 to receive the control signal from the refrigerator evaporator 40 to remove the frost formed on the refrigerator evaporator 40 Drive control of the refrigerating chamber heater 47 installed on the lower side And a second heater driving unit 144.

Compressor driving means 150 according to the difference between the temperature (Tfs, Trs) set by the user by the temperature control means 110 and the internal temperature (Tf, Tr) detected by the temperature sensing means 120 By driving the compressor 56 to perform a cooling operation of the refrigerator by receiving a control signal output from the control means 130, the compressor driving means 150 changes the freezer compartment when the compressor 56 is driven. By simply implementing the TRIAC or SSR to receive the control signal output from the control means 130 according to the operating conditions of the fan 30 and the refrigerating compartment fan 44 to vary the voltage input to the compressor 56. Phase control the compressor 56.

In addition, the fan motor driving means 160 is to maintain the internal temperature (Tf, Tr) of the freezer compartment and the refrigerating chamber (22, 24) detected by the temperature sensing means 120 at a temperature set by the user. The fan motor is driven by driving and controlling the fan motors 28 and 42 which receive the control signal output from the control means 130 and circulate the cold air heat exchanged by the freezer and refrigerator compartment evaporators 26 and 40. The means 160 is outputted from the control means 130 to maintain the internal temperature Tf of the freezer compartment 22 detected by the freezer compartment temperature detector 122 at a temperature Tfs set by the user. The first fan motor driving unit 162 for driving control of the freezer compartment fan motor 28 for circulating the cold air heat exchanged by the freezer compartment evaporator 26 by receiving the control signal, and the refrigerating compartment temperature detection unit 124. The user sets the detected internal temperature Tr of the refrigerator compartment 24. A second control unit for controlling the refrigerating chamber fan motor 42 which receives the control signal output from the control unit 130 to maintain the temperature Trs constant and circulates the cold air heat exchanged by the refrigerating chamber evaporator 40. The fan motor driving unit 164 is configured.

Hereinafter, the operational effects of the compressor control apparatus and its method of the refrigerator configured as described above will be described.

5A and 5B are flowcharts showing the operation procedure of the compressor control of the refrigerator according to the present invention. In FIGS. 5A and 5B, S denotes a step.

First, when power is applied to the refrigerator, the power supply means 100 converts a power supply voltage of a commercial AC power input from an AC power terminal (not shown) into a predetermined DC voltage required for driving the refrigerator, thereby driving each circuit and control means ( 130).

Therefore, in step S1, the DC voltage output from the power supply means 100 is inputted from the control means 130, and the refrigerator is initialized according to the cooling control function. In step S2, the predetermined temperature of the freezing chamber 22 and the refrigerating chamber 24 is determined. The freezer compartment temperature control unit 112 and the refrigerating compartment temperature control unit 114 respectively installed at the position set the internal temperature Tfs, Trs of the freezer compartment 22 and the refrigerating compartment 24 desired by the user.

Subsequently, in step S3, the internal temperature Tf and Tr of the freezing chamber 22 and the refrigerating chamber 24 are changed to cool the freezing chamber 22 and the refrigerating chamber 24 at the temperatures Tfs and Trs set in the step S2. Is sensed by the freezer compartment temperature detector 122 or the refrigerator compartment temperature detector 124 to determine whether the compressor 56 is on.

The on condition of the compressor 56 is that the internal temperature Tf, Tr detected by the freezer compartment temperature detector 122 and the refrigerating compartment temperature detector 124 is higher than the temperature Tfs, Trs set by the user. In a high case, it is an operating condition for driving the compressor 56 to cool the freezing chamber 22 and the refrigerating chamber 24.

As a result of the determination in step S3, when the compressor 56 is not in an on condition (NO), the internal temperatures Tf and Tr of the freezing chamber 22 and the refrigerating chamber 24 are set temperatures Tfs and Trs. Since it is in a lower state, the flow returns to the step S3, and the freezing chamber 22 and the refrigerating chamber 24 of the freezing chamber 22 or the refrigerating chamber 24 become higher than the set temperature Tfs, Trs. The operation under step S3 is repeatedly performed while continuously detecting the internal temperature Tf and Tr.

On the other hand, when the determination result in the step S3 indicates that the compressor 56 is in an on condition (YES), the internal temperatures Tf and Tr of the freezing chamber 22 or the refrigerating chamber 24 are set temperatures Tfs and Trs. In step S4, the control means 130 outputs a control signal for driving the compressor 56 to the compressor driving means 150.

Accordingly, the compressor driving means 150 drives the compressor 56 while controlling the phase of the input voltage of the compressor 56 at 220V / AC under the control of the control means 130.

Subsequently, in step S5, the freezing chamber temperature detection unit 122 detects the change in the internal temperature Tf of the freezing chamber 22 when the compressor 56 is driven to determine whether the freezing chamber fan 30 is in an on condition.

The on condition of the freezer compartment fan 30 is to cool the freezer compartment 22 when the internal temperature Tf detected by the freezer compartment temperature detector 122 is higher than the temperature Tfs set by the user. Operation conditions for driving the freezer compartment fan 30.

As a result of the discrimination in step S5, when the freezer compartment 30 is in an on condition (YES), the internal temperature Tf of the freezer compartment 22 is higher than the set temperature Tfs. The means 130 outputs a control signal to the first fan motor driver 162 to cool the freezing compartment 22.

Accordingly, in the first fan motor driving unit 162, a freezer compartment connected to the shaft of the freezer compartment fan motor 28 by driving a freezer compartment fan motor 28 by turning on a relay (not shown) under the control of the control unit 130. The fan 30 starts to rotate in conjunction with this.

Subsequently, in step S7, the refrigerator internal temperature Tr of the refrigerator compartment 24, which changes during the operation of the compressor 56, is sensed by the refrigerator compartment temperature detecting unit 124 to determine whether the refrigerator compartment fan 44 is in an on condition.

The on condition of the refrigerating compartment fan 44 is to cool the refrigerating compartment 24 when the internal temperature Tr sensed by the refrigerating compartment temperature detection unit 124 is higher than the temperature Trs set by the user. Operation conditions for driving the refrigerator compartment fan 44.

As a result of the discrimination in step S7, when the refrigerating chamber fan 44 is in an on condition (YES), the internal temperature Tr of the refrigerating chamber 24 is higher than the set temperature Trs, and control proceeds to step S8. The means 130 outputs a control signal to the second fan motor driver 164 to cool the refrigerating chamber 24.

Accordingly, the second fan motor driving unit 164 turns on a relay (not shown) under the control of the control unit 130 to drive the refrigerator compartment fan motor 42 to connect the refrigerator compartment fan shaft 42 to the shaft of the refrigerator compartment fan motor 42. The fan 44 is linked to it and starts to rotate.

If both the freezer compartment fan 30 and the refrigerating compartment fan 44 are on conditions when the compressor 56 is driven, the compressor driving means 150 inputs the compressor 56 under the control of the control means 130 in step S9. Continue to phase control the voltage to 220V / AC.

As described above, when the compressor 56, the freezer compartment fan 30, and the refrigerating compartment fan 44 are driven, the refrigerant compressed by the compressor 56 into the gas of high temperature and high pressure passes through the auxiliary condenser 60, and the evaporation plate ( The defrost water collected in 54) is evaporated, and the refrigerant passing through the auxiliary condenser 60 is introduced into the main condenser 58 and heat-exchanged by natural convection or forced convection with external air, thereby cooling the refrigerant with low temperature and high pressure. Liquefy.

The low temperature and high pressure liquid refrigerant liquefied in the main condenser (58) is pressurized into a freezer of low temperature and low pressure that is easy to evaporate while passing through a capillary tube (57) that expands to the evaporation pressure. Flows into).

Therefore, in the freezer compartment and the refrigerating chamber evaporators 26 and 40, the low-temperature low-pressure free refrigerant depressurized in the capillary tube 57 evaporates while passing through a plurality of pipes, and heats the high-air air with cold air (cold air). The low-temperature, low-pressure gas refrigerant cooled in the freezer compartment and the refrigerator compartment evaporators 26 and 40 is sucked into the compressor 56 again to form a repetitive freezing cycle, as shown in FIG. 2.

Accordingly, the cold air heat-exchanged by the freezer compartment evaporator 26 and the refrigerator compartment evaporator 40 is formed by the first and second duct members 32 and 46 by the rotational force of the freezer compartment fan 30 and the refrigerating compartment fan 44. It is guided along and discharged into the freezing chamber 22 and the refrigerating chamber 24 through the cold air discharge ports (32a, 46a) to cool the freezing chamber 22 and the refrigerating chamber (24).

At this time, the freezing chamber 22 or the refrigerating chamber 24 which changes during the cooling operation of the freezing chamber 22 and the refrigerating chamber 24 by driving the compressor 56, the freezing chamber fan 30, and the refrigerating chamber fan 44. The inside temperature Tf and Tr are sensed by the freezer compartment temperature detector 122 and the refrigerating compartment temperature detector 124 and output to the control means 130.

Therefore, in step S10, the temperature (Tfs) set by the user of the internal temperature (Tf, Tr) of the freezer compartment 22 or the refrigerator compartment 24 detected by the freezer compartment temperature detector 122 and the refrigerator compartment temperature detector 124. It is determined whether or not the compressor 56 is in an off condition in comparison with, Trs.

The off condition of the compressor 56 means that the internal temperature Tf and Tr sensed by the freezer compartment temperature detector 122 and the refrigerating compartment temperature detector 124 are higher than the temperature Tfs, Trs set by the user. In a low case, it is an operation condition for stopping the compressor 56 to stop the cooling operation of the freezing chamber 22 and the refrigerating chamber 24.

As a result of the determination in step S10, when the compressor 56 is not in an off condition (NO), the internal temperatures Tf and Tr of the freezing chamber 22 or the refrigerating chamber 24 are set temperatures Tfs and Trs. Since it is in a higher state, the flow returns to step S5 to continuously cool the freezing chamber 22 and the refrigerating chamber 24, and the operations below Step S5 are repeatedly performed.

On the other hand, when the determination result in step S10 indicates that the compressor 56 is in an off condition (YES), the internal temperatures Tf and Tr of the freezer compartment 22 and the refrigerating compartment 24 are set temperatures Tfs and Trs. In step S11, the control means 130 outputs a control signal to the first and second fan motor driving units 164 for stopping the cooling operation of the freezing compartment 22 and the refrigerating compartment 24.

Accordingly, the first and second fan motor driving units 162 and 164 stop driving the freezer compartment fan motor 28 and the refrigerating compartment fan motor 42 under the control of the control means 130. While the fan 44 is interlocked with the fan 44, the cooling operation of the freezer compartment 22 and the refrigerating compartment 24 is stopped.

When both the freezer compartment fan 30 and the refrigerating compartment fan 44 are stopped, the control means 130 outputs a control signal for stopping the compressor 56 to the compressor driving means 150 in step S12.

Accordingly, the compressor driving means 150 blocks the input voltage applied to the compressor 56 under the control of the control means 130 to stop the operation of the compressor 56 to terminate the operation.

At this time, after the compressor 56 is stopped, the initial phase control condition is set back to 220V / AC, which is too low to be applied to the compressor 56 by the phase control at the initial startup of the compressor 56. This is to prevent the phenomenon that 56 is not driven.

On the other hand, if the determination result in step S5 indicates that the freezer compartment fan 30 is not in the on condition (NO), the process proceeds to step S51 to determine whether the refrigerating compartment fan 44 is in the on condition, and the refrigerating compartment fan 44 If the condition is not ON (NO), the process proceeds to the step S10 and repeats the operation of the step S10 or less.

As a result of the discrimination in step S51, when the refrigerating chamber fan 44 is in an on condition (YES), the internal temperature Tr of the refrigerating chamber 24 is higher than the set temperature Trs. In 130, the freezing chamber 22 is turned off and a control signal is output to the first and second fan motor driving units 162 and 164 to cool the refrigerating chamber 24.

Therefore, the first fan motor driving unit 162 stops the driving of the freezer compartment fan motor 28 under the control of the control means 130, while the freezer compartment 30 is stopped while the freezing compartment 22 is stopped. In the second fan motor driving unit 164, the refrigerator compartment fan 44 starts to rotate by turning on a relay (not shown) under the control of the control means 130 to drive the refrigerator compartment fan motor 42.

If the freezer compartment fan 30 is off when the compressor 56 is driven and the refrigerating compartment fan 44 is in the on condition, the compressor driving means 150 in step S53 causes the control means at a point where the load of the compressor 56 varies. Under the control of 130, the compressor 56 is driven while phase controlling the input voltage of the compressor 56 at 170V / AC.

As described above, when the compressor 56 and the refrigerating chamber fan 44 are driven, the coolant compressed by the compressor 56 into the gas of high temperature and high pressure passes through the auxiliary condenser 60, and the defrost water collected in the evaporation plate 54. After evaporating the refrigerant, the refrigerant passing through the auxiliary condenser 60 is introduced into the main condenser 58 and is heat-exchanged by natural convection or forced convection with external air to cool and liquefy the refrigerant at low temperature and high pressure.

The low temperature and high pressure liquid refrigerant liquefied in the main condenser 58 is decompressed to a low temperature low pressure free refrigerant which is easy to evaporate while passing through a capillary tube 57 which expands to the evaporation pressure, and the freezer evaporator 26 and the refrigerating chamber evaporator 40 Flows into).

Therefore, in the freezer compartment and the refrigerating chamber evaporators 26 and 40, the low-temperature low-pressure free refrigerant depressurized in the capillary tube 57 evaporates while passing through a plurality of pipes, and heats the high-air air with cold air (cold air). The low-temperature, low-pressure gas refrigerant cooled in the freezer compartment and the refrigerator compartment evaporators 26 and 40 is sucked into the compressor 56 again to form a repetitive freezing cycle, as shown in FIG. 2.

At this time, since the freezer compartment fan 30 does not rotate but only the refrigerating compartment fan 44 is rotated, heat exchange is not performed in the freezer compartment evaporator 26, and heat exchange is performed only in the refrigerator compartment evaporator 40.

Accordingly, the cold air heat exchanged by the refrigerating chamber evaporator 40 is guided along the second duct member 46 by the rotational force of the refrigerating chamber fan 44 and discharged into the refrigerating chamber 24 through the cold air outlet 46a. While cooling the refrigerating chamber 24, the process proceeds to the step S10, and the operation of the step S10 or less is repeated.

On the other hand, when the refrigerating chamber fan 44 is not in an on condition (NO), the determination result in step 57 shows that the internal temperature Tr of the refrigerating chamber 24 is lower than the set temperature Trs, and so the process proceeds to step S71. Further, the control means 130 outputs a control signal for stopping the cooling operation of the refrigerating chamber 24 to the second fan motor driver 164.

Accordingly, the second fan motor driving unit 164 stops driving the refrigerating compartment fan motor 42 under the control of the control means 130, thereby stopping the refrigerating operation of the refrigerating compartment 24 while the refrigerating compartment fan 44 is stopped. However, the freezer compartment 44 is driven.

If the refrigerator compartment fan 44 is off when the compressor 56 is driven and the freezer compartment 30 is in an on condition, the compressor driving means 150 in step S72 controls the control means at a point where the load of the compressor 56 varies. Under the control of 130, the compressor 56 is driven while phase controlling the input voltage of the compressor 56 at 180V / AC.

As described above, when the compressor 56 and the freezer compartment 30 are driven, the refrigerant compressed by the compressor 56 into the gas of high temperature and high pressure passes through the auxiliary condenser 60, and the defrost water collected in the evaporation plate 54 is performed. After evaporating the refrigerant, the refrigerant passing through the auxiliary condenser 60 is introduced into the main condenser 58 and is heat-exchanged by natural convection or forced convection with external air to cool and liquefy the refrigerant at low temperature and high pressure.

The low temperature and high pressure liquid refrigerant liquefied in the main condenser (58) is pressurized into a freezer of low temperature and low pressure that is easy to evaporate while passing through a capillary tube (57) that expands to the evaporation pressure. Flows into).

Therefore, in the freezer compartment and the refrigerating chamber evaporators 26 and 40, the low-temperature low-pressure free refrigerant depressurized in the capillary tube 57 evaporates while passing through a plurality of pipes, and heats the high-air air with cold air (cold air). The low-temperature, low-pressure gas refrigerant cooled in the freezer compartment and the refrigerator compartment evaporators 26 and 40 is sucked into the compressor 56 again to form a repetitive freezing cycle, as shown in FIG. 2.

At this time, since the refrigerating compartment fan 44 does not rotate, only the freezing compartment fan 30 is rotated, heat exchange is not performed in the refrigerating compartment evaporator 40, and heat exchange is performed only in the freezer compartment evaporator 26.

Accordingly, the cold air heat exchanged by the freezer compartment evaporator 26 is guided along the first duct member 32 by the rotational force of the freezer compartment fan 30 and discharged into the freezer compartment 22 through the cold air outlet 32a. As a result, the cooling unit 22 is cooled, and the flow proceeds to the step S10 to repeat the operation of the step S10 or less.

As described above, according to the compressor control apparatus and method of the refrigerator according to the present invention, the refrigerator 56 is input to the compressor 56 through phase control at a point where the refrigerator compartment fan 44 is turned off in the on state of the compressor 56. By controlling the voltage to drive the compressor 56 at the optimum efficiency, power consumption can be reduced.

Claims (5)

A storage compartment comprising a freezer compartment 22 and a refrigerating compartment 24, a compressor 56 for compressing a refrigerant at high temperature and high pressure, and installed in the storage compartments 22 and 24, respectively, to cool air in the storage compartments 22 and 24 to cold. Evaporators 26 and 40 for heat exchange, and fans 30 and adjacent to the evaporators 26 and 40 so as to supply the cold air heat exchanged by the evaporators 26 and 40 to the storage chambers 22 and 24, respectively. 44. A refrigerator comprising: control means (130) for controlling a voltage input to the compressor (56) in accordance with an operating state of the fans (30, 44) which change when the compressor (56) is driven; Compressor control device of the refrigerator, characterized in that consisting of compressor driving means (150) for varying the voltage input to the compressor (56) in accordance with the control of the control means (130). According to claim 1, wherein the compressor driving means 150, when both the freezer compartment fan 30 and the refrigerating compartment fan 44 is turned on during the operation of the compressor 56, the initial phase control of the input voltage of the compressor 56 Compressor control device of a refrigerator, characterized in that maintained under conditions. According to claim 1, wherein the compressor driving means 150, when the freezer compartment fan 30 is turned on and the refrigerating compartment fan 44 is turned off when the compressor 56 is driven, the compressor phase control the phase of the compressor 56 Compressor control device of a refrigerator, characterized in that the input voltage is variable. According to claim 1, wherein the compressor driving means 150, when the refrigerating chamber fan 44 is turned on and the freezer compartment fan 30 is turned off when the compressor 56 is driven, phase control the compressor 56 to the compressor ( 56. A compressor control apparatus for a refrigerator, characterized by varying an input voltage of 56). In the control method of the refrigerator for supplying cold air to the storage compartment (22, 24) in accordance with the operation of the fan (30, 44) installed in the storage compartment consisting of the freezer compartment 22 and the refrigerating compartment (24), respectively The compressor operation determining step of determining the driving conditions of the compressor 56 on the basis of the internal temperature and the set temperature of the storage chambers 22 and 24, and the freezing chamber 22 and the refrigerating chamber if the driving conditions of the compressor 56 are A fan operation determination step for determining the driving conditions of the freezer compartment 30 and the refrigerating compartment fan 44 by comparing the internal temperature of the refrigerator 24 with the set temperature, and the freezer compartment fan 30 when the compressor 56 is driven. And a voltage control step of controlling the input voltage of the compressor by phase-controlling the compressor (56) according to the operating state of the refrigerating chamber fan (44).