KR102002504B1 - Refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator. A refrigerator according to an embodiment of the present invention includes a compressor for compressing a refrigerant, a freezer compartment evaporator and a refrigerating compartment evaporator for performing heat exchange using the compressed refrigerant, a freezer compartment defroster that operates to remove the impurities adhered to the freezing compartment evaporator, A refrigerator compartment defroster heater which operates to remove a frost on the evaporator of the refrigerator compartment, a current detector which measures a current of an input power source supplied to the refrigerator, a current detected and an operation state of the compressor, a freezer compartment defroster heater, And calculates a power consumed in the refrigerator based on the estimated power factor. Thus, the power consumption calculation can be performed easily.

Description

Refrigerator {Refrigerator}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a refrigerator, and more particularly, to a refrigerator that can easily perform a power consumption calculation.

Generally, a refrigerator is a device used to store foods fresh for a long period of time. The refrigerator is composed of a freezer compartment for freezing food, a refrigerator compartment for refrigerating the plant, and a freezing cycle for cooling the freezer compartment and the refrigerating compartment. The operation control is performed by the control unit.

Unlike in the past, such a refrigerator is not simply a space for eating, but it is transformed into a major living space for family members to converge and solve dietary habits. Therefore, refrigerator, which is a key element in kitchen space, In addition, there is a need for quantitative / qualitative functional changes to facilitate the use of all family members.

An object of the present invention is to provide a refrigerator which can easily perform power consumption calculation.

According to an aspect of the present invention, there is provided a refrigerator including: a compressor for compressing refrigerant; a freezer compartment evaporator and a refrigerating compartment evaporator for performing heat exchange using the compressed refrigerant; A freezing chamber defrost heater which operates to remove frost from the freezing compartment evaporator, a current detector which measures a current of the input power supplied to the refrigerator, a detected current, a compressor, a freezer defrost heater, And a control unit for estimating a power factor based on the operating state of the refrigerating compartment defrost heater and calculating power consumed in the refrigerator based on the estimated power factor.

According to another aspect of the present invention, there is provided a refrigerator comprising: a plurality of power consumption units that consume power; a current detection unit that measures currents of input power supplied to the refrigerator; And a control unit for estimating a power factor based on the operation state of the power consumption unit of the refrigerator, and calculating power consumed in the refrigerator based on the estimated power factor.

According to the embodiment of the present invention, in the current detecting section that measures the current of the input power supplied to the refrigerator, the power factor is estimated based on the detected current and the operating state of the compressor, the freezer compartment defrost heater, The power consumed in the refrigerator can be calculated based on the power factor, so that the power consumption calculation can be performed easily.

Particularly, it is possible to estimate the power factor of the input current and the input voltage input to the refrigerator without measuring the power consumption consumed by the compressor, measuring the power consumption consumed by the freezer compartment defrost heater, and measuring the power consumption consumed by the defrosting heater, It is possible to easily perform the power consumption calculation by calculating the refrigerator power consumption according to the estimated power factor.

According to another embodiment of the present invention, the power consumption estimation and the power consumption calculation are performed based on the operation states of the plurality of power consumption units in the refrigerator and the input current to the refrigerator, so that the power consumption calculation can be performed easily .

1 is a perspective view illustrating a refrigerator according to an embodiment of the present invention.
2 is a view schematically showing the configuration of the refrigerator of FIG.
3 is a block diagram schematically illustrating the interior of the refrigerator shown in FIG.
Fig. 4 is a view showing a circuit part inside the refrigerator shown in Fig. 1. Fig.
FIGS. 5 to 7D are diagrams for explaining a power consumption calculation method of a refrigerator according to an embodiment of the present invention.

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

The suffix "module" and " part "for components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, the terms "module" and "part" may be used interchangeably.

1 is a perspective view illustrating a refrigerator according to an embodiment of the present invention.

The refrigerator 1 according to the present invention includes a case 110 having an inner space divided into a freezing chamber and a refrigerating chamber, a freezing chamber door 120 for shielding the freezing chamber, The outer appearance of the refrigerator is formed by the door 140 of the refrigerator.

A door handle 121 protruding frontward is further provided on the front surface of the freezing compartment door 120 and the refrigerating compartment door 140 so that the user can easily grip the freezing compartment door 120 and the refrigerator compartment door 140 .

Meanwhile, a home bar 180 may be provided on the front of the refrigerator compartment door 140, which is a means for allowing a user to take out a stored beverage such as beverage without opening the refrigerator compartment door 140.

The dispenser 160 may be provided on the front surface of the freezer compartment door 120 as a convenience means for allowing a user to easily remove ice or drinking water without opening the freezer compartment door 120. In addition, A control panel 200 for controlling the driving operation of the refrigerator 1 and showing the state of the refrigerator 1 in operation can be further provided on the upper side.

The control panel 200 may include an input unit 220 including a plurality of buttons, and a display unit 230 for displaying a control screen and an operating state.

The display unit 230 displays information such as a control screen, an operating state, and a room temperature. For example, the display unit 230 can display the service type (each ice, water, sculptured ice) of the dispenser, the set temperature of the freezer, and the set temperature of the freezer.

The display unit 230 may be implemented as a liquid crystal display (LCD), a light emitting diode (LED), an organic light emitting diode (OLED), or the like. Also, the display unit 230 may be implemented as a touch screen capable of performing the function of the input unit 220 as well.

The input unit 220 may include a plurality of operation buttons. For example, the input unit 220 may include a dispenser setting button (not shown) for setting a dispenser service type (ice, water, sculpted ice, etc.), a freezer room temperature setting button (not shown) And a refrigerator compartment temperature setting button (not shown) for setting the freezer compartment temperature. Meanwhile, the input unit 220 may be implemented as a touch screen capable of performing the function of the display unit 230 as well.

Meanwhile, the refrigerator according to the present invention is not limited to the double door type shown in the drawing, but may be a one door type, a sliding door type, a curtain door type, Type, and the like, and it is sufficient to provide a compressor and a fan for a refrigerator refrigeration cycle or a refrigeration cycle.

2 is a view schematically showing the configuration of the refrigerator of FIG.

The refrigerator 1 includes a compressor 112, a condenser 116 for condensing the refrigerant compressed by the compressor 112, a condenser 116 for condensing the refrigerant condensed in the condenser 116, A refrigerating compartment evaporator 122 disposed in a refrigerating compartment (not shown), a freezing compartment evaporator 124 disposed in a freezing compartment (not shown), and a refrigerant condenser 123 condensed in the refrigerating compartment evaporator 122 or the freezing compartment evaporator 124 A refrigerating compartment expansion valve 132 for expanding the refrigerant supplied to the refrigerating compartment evaporator 122 and a freezing compartment expansion valve 134 for expanding the refrigerant supplied to the freezing compartment evaporator 124 do.

The refrigerator 1 may further include a gas-liquid separator (not shown) in which refrigerant having passed through the evaporators 122 and 124 is separated into a liquid and a gas.

The refrigerator 1 further includes a refrigerator compartment fan 142 and a freezer compartment fan 142 for sucking the refrigerant that has passed through the refrigerating compartment evaporator 122 and the freezing compartment evaporator 124 and blowing them into a refrigerating compartment (not shown) and a freezing compartment (not shown) 144).

The controller may further include a compressor driving unit 113 for driving the compressor 112 and a refrigerating compartment fan driving unit 143 and a freezing compartment fan driving unit 145 for driving the refrigerating compartment fan 142 and the freezing compartment fan 144.

3 is a block diagram schematically illustrating the interior of the refrigerator shown in FIG.

3 includes a compressor 112, a refrigerating compartment fan 142, a freezing compartment fan 144, a controller 310, a first heater 330, a first heater 330, 2 heater 331, a temperature sensing unit 320, and a memory 240. The refrigerator compartment fan drive unit 143, the freezer compartment fan drive unit 145, the first heater drive unit 332, the second heater drive unit 331, the display unit 230, and the input unit 220 are further connected to the compressor driving unit 113, .

For a description of the compressor 112, the refrigerating compartment fan 142, and the freezing compartment fan 144, see FIG.

The input unit 220 includes a plurality of operation buttons and transmits a signal to the control unit 310 about the input freezing room set temperature or the refrigerating room setting temperature.

The temperature sensing unit 320 senses the temperature in the refrigerator and transmits a signal indicating the sensed temperature to the controller 310. [ Here, the temperature sensing unit 320 senses the refrigerator compartment temperature and the freezer compartment temperature, respectively. It is also possible to detect the temperature of each chamber in the refrigerating chamber or each chamber in the freezing chamber.

The control unit 310 controls the compressor driving unit 113 and the fan driving unit 143 or 145 directly to control the on / off operation of the compressor 112 and the fan 142 or 144, And finally control the compressor 112, and the fan 142 or 144. [0050] Here, the fan driving unit may be a refrigerator compartment fan driving unit 143 or a freezing compartment fan driving unit 145.

For example, the control unit 310 may include a microcomputer and may output a corresponding speed command value signal to the compressor driving unit 113 or the fan driving unit 143 or 145, respectively.

The compressor driving unit 113 and the freezing compartment fan driving unit 145 each include a compressor motor (not shown) and a freezer compartment fan motor (not shown), and each of the motors (not shown) And can be operated at the target rotation speed according to the control.

Meanwhile, the refrigerator compartment fan driving unit 143 includes a motor for driving a fan (not shown), and a motor for driving the fan (not shown) can be operated at a target rotation speed under the control of the controller 310.

When such an electric motor is a three-phase electric motor, it can be controlled by a switching operation in an inverter (not shown) or can be controlled at a constant speed by using AC power as it is. Here, each electric motor (not shown) may be any one of an induction motor, a BLDC (blush less DC) electric motor, a synRM (synchronous reluctance motor) electric motor, and the like.

The display unit 230 can display the operation state of the refrigerator. Meanwhile, in connection with the embodiment of the present invention, the power consumption calculated by the controller 310 can be displayed.

The memory 240 may store data necessary for refrigerator operation. On the other hand, with respect to the embodiment of the present invention, it is possible to store the detected current and a power factor value or a power factor calculation expression corresponding to an operation state of a plurality of power consumption units such as a compressor.

On the other hand, the control unit 310 can control the operation of the entire refrigerator 1, in addition to the operation control of the compressor 112 and the fans 142 and 144, as described above.

That is, the control unit 310 can control the overall operation of the refrigerant cycle in accordance with the set temperature from the input unit 220. For example, in addition to the compressor drive 113, the freezer compartment fan driver 145, and the refrigerator compartment fan driver 143, the freezer compartment expansion valve 134 may be further controlled. The operation of the condenser 116 can also be controlled. In addition, the control unit 310 may control the operation of the display unit 230.

On the other hand, the control unit 310 can receive the detection current value for the input power supplied to the refrigerator 1 from the current detection unit (Fig. 4A). On the other hand, the control unit 310 can grasp the overall operation state of the refrigerator.

The control unit 310 estimates the power factor based on the detected current and the operating state of the compressor 112, the freezer compartment defrost heater 330, and the refrigerating compartment defrost heater 331 according to the embodiment of the present invention. And calculates power consumed in the refrigerator 1 based on the estimated power factor.

For example, the control unit 310 estimates the power factor as a first power factor value when the freezer compartment defroster heater 330 and the refrigerating compartment defrost heater 331 operate and the compressor 112 does not operate, Can be calculated with the first power value.

As another example, when the freezer compartment defrost heater 330 operates and the refrigerating compartment defrost heater 331 and the compressor 112 do not operate, the control unit 310 estimates the power factor as a second power factor value, The second power value can be calculated.

As another example, when the freezer compartment defrost heater 330 and the compressor 112 operate and the refrigerating compartment defrost heater 331 does not operate, the control unit 310 estimates that the power factor becomes smaller as the magnitude of the detected current increases. And the power consumed in the refrigerator can be calculated using the estimated power factor.

On the other hand, when the compressor 112 operates and the freezer compartment defroster heater 330 and the refrigerating compartment defrost heater 331 are not operated, the control unit 310 estimates that the power factor increases as the magnitude of the detected current increases , And the power consumed in the refrigerator can be calculated using the estimated power factor.

On the other hand, the control unit 310 can estimate the power factor using the power factor and the equation stored in the memory 240, and calculate the power consumed in the refrigerator using the estimated power factor.

When the freezer compartment defroster heater 330 and the compressor 112 are operated, the control unit 310 determines whether the compressor 112 is operating or not, compared with the case where only the freezer compartment defrost heater 330 operates and the compressor 112 does not operate, Or the amount of change in the power consumption is larger.

The control unit 310 can calculate that when the compressor 112 operates, the power factor variation is larger or the power consumption variation is larger than the detected current in comparison with the case where the compressor 112 does not operate .

As described above, the power factor estimation and power consumption calculation of the control unit 310 will be described in detail with reference to FIG. 4 and subsequent figures.

Fig. 4 is a view showing a circuit part inside the refrigerator shown in Fig. 1. Fig.

Referring to FIG. 4, the circuit unit 610 of FIG. 4 may include at least one circuit board provided in the refrigerator.

Specifically, the circuit unit 610 includes an input current detection unit A, a power supply unit 415, a control unit 310, a memory 240, a compressor microcomputer 430, a display microcomputer 432, .

First, the input current detection section A can detect the input current (is) input from the commercial AC power source 405. To this end, a current transformer (CT), a shunt resistor, or the like may be used as the input current detector A. The detected input current is is a pulse-shaped discrete signal that can be input to the control unit 310 for power factor estimation.

The power supply unit 415 can convert the power of the input AC power to generate operating power so that each unit in the circuit unit 610 can operate. Here, the operation power source may be a DC power source. To this end, the power supply unit 415 may include a converter having a switching element or a rectifying part without a switching element.

The compressor microcomputer 430 outputs a signal for driving the compressor 122. Although not shown in the figure, an inverter (not shown) may be used to operate the compressor motor provided in the compressor 1220. The compressor microcomputer 430 may control the inverter (not shown) And the inverter can be controlled. Then, the switching control signal Si can be generated by receiving the current (io) flowing through the compressor motor and by feedback control.

The display microcomputer 432 can control the display unit 230. Data to be displayed on the display unit 230 may be generated and transmitted to the display unit 230 or the data input by the control unit 310 may be transmitted to the display unit 310. [

The communication microcomputer 434 can control a communication unit (not shown) provided in the refrigerator 1. [ Here, the communication unit (not shown) may include at least one of a wireless communication unit such as WiFi or Zigbee, a near-field communication unit such as NFC, and a wired communication unit such as a UART.

Although the communication microcomputer 434 and the display microcomputer 432 exchanges data with each other, the communication microcomputer 434 can exchange data with the control unit 310 directly.

On the other hand, the control unit 310 can control the overall control operation in the refrigerator. For this, the control unit 310 may be called a main microcomputer.

The control unit 310 can exchange data with the memory 240, the compressor microcomputer 430, the display microcomputer 432, and the communication microcomputer 434. In addition, the control unit 310 can exchange data with the fan 444 and the heater 445 as well.

4 may be used to refer to both the refrigerator compartment fan 142 and the freezer compartment fan 144 described above and the heater 445 of Figure 4 may be used to refer to both the freezer compartment defrost heater 330, Heater 331 may be referred to.

The control unit 310 can grasp the operating states of the compressor 310, the freezer compartment defrost heater 330, and the refrigerating compartment defrost heater 331, which are units that consume large electric power among the plurality of power consumption units in the refrigerator. For example, with respect to the compressor 310, the operation state of the freezer compartment defroster heater 330 and the refrigerating compartment defrost heater 331 can be grasped directly through the compressor microcomputer 430.

The control unit 310 can estimate the power factor based on the input current is detected by the input current detection unit A. [

For example, when the input voltage of the commercial AC power source is 220V, the effective value (V _RMS ) of the input voltage corresponds to a fixed value of 220V. As another example, when the input voltage of the commercial AC power source is 110 V, the effective value (V _RMS ) of the input voltage corresponds to a fixed value of 110 V.

Since the power factor (ppower factor) is related to the phase difference between the input voltage and the input current, the power factor can be calculated or estimated if the input current value is known. When the power factor is known, the power can be calculated as shown in the following equation (1).

Where P is the input power, V _RMS is the effective value of the input voltage, I _RMS is the effective value of the input current, and PF is the power factor.

As a result, when the input power P is calculated, the power consumption consumed in the refrigerator 1 can be calculated.

To this end, in the embodiment of the present invention, as described above, the input current is detected and the power factor is estimated based on the input current value, that is, the effective value (I _RMS ) of the input current.

When estimating the power factor, the value may vary depending on the operation state of the power consumption unit in the refrigerator. 5 exemplifies the power factor and the power consumption according to the operating states of the freezer compartment defrost heater 330, the refrigerating compartment defrost heater 331, and the compressor 112 among the power consumption units in the refrigerator.

FIGS. 5 to 7D are diagrams for explaining a power consumption calculation method of a refrigerator according to an embodiment of the present invention.

5, the table 500 shown in FIG. 5 includes information on the power factor and the power consumption according to the operation states of the freezer compartment defrost heater 330, the refrigerating compartment defrost heater 331, and the compressor 112 And may be stored in the memory 240 as described above.

The table 500 in FIG. 5 identifies the operating states of the freezer compartment defrost heater 330, the refrigerating compartment defrost heater 331, and the compressor 112 as shown in the following (1) to (4).

(1) The freezing chamber defrost heater 330, the defrosting chamber defrost heater 331 are on, the compressor 112 is off

(2) The freezer defrost heater 330 is on, the defrosting chamber heater 331, and the compressor 112 is off

(3) The freezer compartment defrost heater 330, the compressor 112 are on, the defrosting compartment heater 331 is off

(4) The freezer defrost heater 330 and the defrosting chamber defrost heater 331 are off, the compressor 112 is on

6A to 7D are graphs showing the relationship between the current value measured actually when the operation states of the freezer compartment defrost heater 330, the refrigerating compartment defrost heater 331 and the compressor 112 are the above (1) to (4) Power factor value, and power value versus current value.

As a result of the measurement, the power consumption is the largest in the case (1), and the order of (2), (3), and (4) is sequentially found.

When the freezer compartment defroster heater 330 and the refrigerating compartment defrost heater 331 are turned on and the compressor 112 is turned off as shown in the following equation (1), the input current value is measured as the value of Ia to Ib as shown in FIG. 6A, It can be seen that the power factor has a constant value and has a PF1 value. The power consumption value is measured to have a value of approximately P1 when the input current value is a value of Ia to Ib as shown in Fig. 7A. Here, the PF1 value means the same value as K1 in FIG.

Next, as shown in (2), when the freezer defrost heater 330 is turned on, the defrosting heater 331, and the compressor 112 are turned off, the input current value is measured as a value of Ic to Id as shown in FIG. At this time, it can be seen that the power factor has a constant value and a PF2 value. The power consumption value is measured to have a value of approximately P2 when the input current value is a value of Ic to Id as shown in Fig. 7B. Here, the value of PF2 means the same value as K2 in Fig.

On the other hand, Ic to Id are values smaller than Ia to Ib, PF2 is smaller than PF1, and P2 is smaller than P1. That is, it can be seen that the magnitude of the detected current value, the power factor, and the power consumption are both greater in the case (1) than in the case of (2).

Next, as shown in (3), when the freezer compartment defroster heater 330, the compressor 112 are turned on, and the defrosting chamber heater 331 is turned off, the input current value is measured as Ie to If as shown in FIG. At this time, it can be seen that the power factor has a decreasing value (PF3 to PF4) with a constant slope with respect to the input current value. The relational expression for this may be f1 (i) as shown in Fig. The power consumption value can have a value (P4 to P3) having a constant slope with respect to the input current value when the input current value is a value of Ie to If as shown in Fig. 7C. The relational expression for this may be fa (i), as in Fig. Here, f1 (i) and fa (i) can be a linear function.

Next, as shown in (4), when the freezer compartment defrost heater 330 and the refrigerating compartment defrost heater 331 are off and the compressor 112 is turned on, the input current value is measured as Ig to Ih as shown in FIG. 6d, At this time, it can be seen that the power factor has values (PF6 to PF5) that increase sequentially with respect to the input current value. The relational expression for this may be f2 (i) as shown in Fig. The power consumption value can have a value (P6 to P5) that increases sequentially with respect to the input current value when the input current value is a value of Ig to Ih as shown in Fig. 7D. The relational expression for this may be fb (i), as shown in Fig. Here, f2 (i) and fb (i) may be logarithmic functions.

Here, Ig to Ih are values smaller than Ie to If, and the power factor of Fig. 6 (d) is a value smaller than PF1 and P2 is smaller than P1. That is, it can be seen that the magnitude of the detected current value, the power factor, and the power consumption are all larger in the case (3) than in the case of (4).

The control unit 310 can determine whether the operation state is any one of the above-described (1) to (4) based on the input current value detected by the input current detection unit A. [ Then, the control unit 310 estimates the power factor using the detected input current value and any one of the operating states (1) to (4), and calculates the power consumption based on the estimated power factor have. That is, as shown in FIG. 5, power factor estimation and power consumption calculation can be performed by selecting any one of (1) to (4).

Accordingly, it is possible to easily calculate the power consumption of the entire refrigerator 1 only by the input current value detected by the input current detection section A. [

As another example, the control unit 310 first determines whether the operation state is any one of (1) to (4), determines the input current value detected by the input current detection unit A, By using any one of the operating states, the power factor can be estimated, and the power consumption can be calculated based on the estimated power factor. That is, as shown in FIG. 5, either one of (1) to (4) may be selected to perform power factor estimation and power consumption calculation.

That is, when the freezer compartment defroster heater 330 and the refrigerating compartment defrost heater 331 operate and the compressor 112 does not operate as in (1), for example, the control unit 310 sets the power factor to the first It is possible to estimate the power factor value PF1 and calculate the power consumption as the first power value P1.

When the freezing compartment defrost heater 330 operates and the refrigerating compartment defrost heater 331 and the compressor 112 do not operate as in (2), the control unit 310 sets the power factor to the second power factor value PF2 ), And the power consumption can be calculated by the second power value P2.

When the freezer compartment defroster heater 330 and the compressor 112 operate and the refrigerating compartment defrost heater 331 does not operate as shown in (3), the controller 310, The power factor is estimated by the calculation formula f1 (i) and the power is calculated by the calculation formula fa (i) so that the power factor becomes small.

When the compressor 112 operates and the freezer compartment defroster heater 330 and the refrigerating compartment defrost heater 331 do not operate as in (4), the controller 310 determines that the larger the magnitude of the detected current, The power factor is estimated by the calculation formula f2 (i) so that the power factor becomes large, and the power is calculated by the calculation formula fb (i).

Thus, the power consumption of the entire refrigerator 1 can be easily calculated only by the input current value detected by the input current detection section A and the operation state of the power consumption unit.

On the other hand, the display unit 230 can display the power consumption calculated by the control unit 310, in addition to displaying the operation state of the refrigerator.

The refrigerator according to the present invention is not limited to the configuration and the method of the embodiments described above but the embodiments may be modified such that all or some of the embodiments are selectively combined .

Meanwhile, the method of operating the refrigerator of the present invention can be implemented as a code that can be read by a processor on a recording medium readable by a processor provided in the refrigerator. The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored. Examples of the recording medium that can be read by the processor include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave such as transmission over the Internet . In addition, the processor-readable recording medium may be distributed over network-connected computer systems so that code readable by the processor in a distributed fashion can be stored and executed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

Claims (15)

A compressor for compressing the refrigerant;
A freezer compartment evaporator and a refrigerating compartment evaporator for performing heat exchange using the compressed refrigerant;
A freezer defrost heater operable to remove the frosting on the freezer compartment evaporator;
A defrosting chamber heater operative to remove the impurities adhered to the defrosting chamber evaporator;
A current detector for measuring a current of the input power supplied to the refrigerator;
And a controller for estimating a power factor based on the detected current and an operation state of the compressor, the freezer compartment defroster heater, and the defrosting defroster heater, and calculating power consumed in the refrigerator based on the estimated power factor In addition,
Wherein,
Wherein when the compressor operates, the power factor variation amount is larger or the power consumption variation amount is larger than the detected current, as compared with the case where the compressor is not operated. The method according to claim 1,
Wherein,
Wherein the power factor estimating unit estimates the power factor as a first power factor value and calculates the power consumption as a first power value when the compressor operates, the freezer compartment defrost heater, and the refrigerator compartment defroster heater. The method according to claim 1,
Wherein,
Estimates the power factor as a second power factor value and calculates the power consumption as a second power value when the freezer compartment defroster heater operates and the refrigerator compartment defroster heater and the compressor do not operate. The method according to claim 1,
Wherein,
Estimating the power factor to be smaller as the magnitude of the detected current increases when the freezer compartment defroster heater and the compressor operate and the refrigerating compartment defrost heater is not operating, and using the estimated power factor, And calculates the consumed electric power. The method according to claim 1,
Wherein,
Estimating the power factor to be larger as the magnitude of the detected current increases when the compressor operates and the freezer compartment defroster heater and the refrigerating compartment defrost heater are not operated, and using the estimated power factor, And calculates the consumed electric power. The method according to claim 1,
Further comprising a memory for storing the detected current and a power factor value or a power factor calculating expression corresponding to the operating state of the compressor, the freezer compartment defrost heater, and the refrigerating compartment defrost heater,
Wherein the control unit estimates the power factor using a power factor value stored in the memory and the calculation formula. The method according to claim 1,
And a display unit for outputting the calculated power consumption. The method according to claim 1,
Wherein,
When the freezer compartment defroster heater and the compressor operate, the power factor variation is larger or the power consumption variation is larger than the detected current, compared with the case where only the freezer compartment defroster heater operates and the compressor is not operated. . delete A plurality of power consumption units that consume power;
A current detector for measuring a current of the input power supplied to the refrigerator;
And a control unit for estimating a power factor based on the detected current and the operation states of the plurality of power consumption units and calculating power consumed in the refrigerator based on the estimated power factor,
When the first power consumption unit consuming the maximum power among the plurality of power consumption units operates and the second power consumption unit consuming the power consumption next to the maximum power consumption unit does not operate, And the power consumption is calculated as a first power value. delete 11. The method of claim 10,
Wherein,
A first power consumption unit which consumes the maximum power among a plurality of power consumption units operates and when the second power consumption unit consuming power consumption next to the maximum power consumption unit operates, Estimates the power factor to be smaller as the power factor increases, and calculates power consumed in the refrigerator using the estimated power factor. 11. The method of claim 10,
Wherein the first power consumption unit is a freezer compartment defrost heater, and the second power consumption unit is a compressor. 11. The method of claim 10,
Further comprising a memory for storing the detected current and a power factor value or a power factor calculating equation corresponding to a compressor, an operation state of the plurality of power consumption units,
Wherein the control unit estimates the power factor using the power factor value and the calculation formula stored in the memory. 11. The method of claim 10,
And a display unit for outputting the calculated power consumption.

Images