KR102122262B1 - Power supply apparatus and home appliance including the same - Google Patents

Abstract

The present invention relates to a power supply device and a home appliance including the same. According to an embodiment of the present invention, the power supply device includes: a power input unit provided with switching elements connected to a commercial alternating current power source and changing the path through which commercial alternating current power is supplied; a charging unit connected to the commercial alternating current power source and controlling the operation of a first switching element, which is one among the switching elements; and a control unit controlling the operation of a second switching element, which is another of the switching elements. The charging unit includes: a unidirectional conduction element; a first resistance element connected in series to the unidirectional conduction element; a capacitor storing the pulsating voltage from the unidirectional conduction element and the first resistance element; a second resistance element having an end connected to one end of the capacitor; and a third switching element connected between the other end of the second resistance element and the other end of the capacitor. The operation of the first switching element can be controlled based on the voltage at both ends of the capacitor. Accordingly, it is possible to cut off power input in accordance with a predetermined cycle with the home appliance in a standby power mode. As a result, the power consumption in the standby power mode can be more effectively reduced. Other various embodiments are also possible.

Description

Power supply and home appliance equipped with the same{POWER SUPPLY APPARATUS AND HOME APPLIANCE INCLUDING THE SAME}

The present invention relates to a power supply and a home appliance having the same, and more particularly, to a power supply that can reduce power consumption in a standby power mode and a home appliance having the same.

A home appliance is a device used for user convenience. In addition, home appliances such as air conditioners, washing machines, and refrigerators used in a predetermined space, such as a home or office, each perform unique functions and operations according to user manipulation.

Since most home appliances operate using electricity, various methods for reducing the amount of power consumed by home appliances are being sought. For example, in the case of an air conditioner, the amount of power consumed by an outdoor unit is larger than that of an indoor unit. In consideration of this, the air conditioner enters standby power mode after a certain period of time has elapsed after the air conditioner is stopped in the indoor unit or the user stops the air conditioner using the remote control. Cut off the power supplied to reduce power consumption.

On the other hand, even when the home appliance enters the standby power mode, it may consume predetermined power. For example, even when the air conditioner enters the standby power mode, power may be consumed for reasons such as driving an infrared sensor or the like to detect occupants in the room.

As such, the home appliance can consume power even in the standby power mode, and a method for more effectively reducing the amount of power consumption in the standby power mode is required.

An object of the present invention relates to a power supply device capable of blocking input of power in a standby cycle in a standby power mode and a home appliance having the same.

In order to achieve the above object, a power supply device according to an embodiment of the present invention includes a plurality of switching elements connected to a commercial AC power supply, a power input unit for changing a path through which commercial AC power is supplied, to a commercial AC power supply. Is connected, and includes a charging unit for controlling the operation of the first switching element among the plurality of switching elements, and a control unit for controlling the operation of the second switching element among the plurality of switching elements, the charging unit is a one-way conduction element, one-way conduction The first resistor element connected in series to the element, the one-way conduction element and the capacitor storing the pulsation voltage from the first resistor element, the second resistor element having one end connected to one end of the capacitor, and the other end and the capacitor of the second resistance element A third switching element connected between the other ends is included, and the operation of the first switching element can be controlled based on the voltage across the capacitor.

In order to achieve the above object, a home appliance according to another embodiment of the present invention includes a plurality of switching elements connected to a commercial AC power supply, a power input unit for changing a path through which commercial AC power is supplied, to a commercial AC power supply. Is connected, and includes a charging unit for controlling the operation of the first switching element among the plurality of switching elements, and a control unit for controlling the operation of the second switching element among the plurality of switching elements, the charging unit is a one-way conduction element, one-way conduction The first resistor element connected in series to the element, the one-way conduction element and the capacitor storing the pulsation voltage from the first resistor element, the second resistor element having one end connected to one end of the capacitor, and the other end and the capacitor of the second resistance element It may include a third switching element connected between the other end, and a power supply for controlling the operation of the first switching element based on the voltage across the capacitor.

According to various embodiments of the present invention, while the home appliance is in the standby power mode, it is possible to cut off the power input according to a predetermined cycle, thereby effectively reducing the amount of power consumption in the standby power mode.

In addition, according to various embodiments of the present invention, since relatively simple circuit elements such as resistors, capacitors, and transistors are used instead of complex and expensive circuit elements, the implementation is easy and the cost is low.

1 is an internal block diagram of a power supply provided in a home appliance according to an embodiment of the present invention.
FIG. 2 is an internal circuit diagram of the power supply of FIG. 1 according to an embodiment of the present invention.
3A and 3B are diagrams referred to for explanation of the operation of the power supply, according to an embodiment of the present invention.
4 is a view referred to for explanation of the operation of switching elements provided in a power supply according to an embodiment of the present invention.
5 is a diagram illustrating a configuration of an air conditioner, which is an example of a home appliance, according to an embodiment of the present invention.
6 is a schematic diagram of the outdoor unit and the indoor unit of FIG. 5 according to an embodiment of the present invention.
7 is a perspective view illustrating a refrigerator, which is an example of a home appliance, according to an embodiment of the present invention.
8 is a diagram briefly showing a configuration of the refrigerator of FIG. 7 according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings. In the drawings, in order to clearly and briefly describe the present invention, illustration of parts irrelevant to the description is omitted, and the same reference numerals are used for the same or extremely similar parts throughout the specification.

The suffixes "modules" and "parts" for components used in the following description are given simply by considering the ease of writing this specification, and do not imply any special significance or role in itself. Therefore, the "module" and the "unit" may be used interchangeably.

In this application, terms such as "comprises" or "have" are intended to indicate the presence of features, numbers, steps, actions, components, parts or combinations thereof described in the specification, but one or more other features. It should be understood that the presence of, or the likelihood of, or addition to, numbers, steps, actions, components, parts, or combinations thereof are not to be excluded in advance.

Further, in this specification, terms such as first and second may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

1 is an internal block diagram of a power supply provided in a home appliance according to an embodiment of the present invention.

Referring to FIG. 1, the power supply 300 includes, for example, a power input unit 310, a charging unit 320, a rectifying unit 330, a dc stage capacitor C1, a voltage step-down unit 340, and/or It may include a control unit 350.

The power input unit 310 may be connected to, for example, a commercial AC power supply 301, and may transmit AC power to the rectifying unit 330.

The power input unit 310 may include a plurality of switching elements (not shown), for example, and may change a path through which AC power is transmitted according to the switching operation of the plurality of switching elements.

For example, the power input unit 310 may turn on at least one of the plurality of switching elements to transfer AC power to the rectifier 330. For example, the power input unit 310 may turn off a plurality of switching elements to cut off the supply of AC power to the rectifier 330.

The plurality of switching elements provided in the power input unit 310 may be, for example, a relay that is turned on or off based on a current flowing through the coil.

The plurality of switching elements provided in the power input unit 310 may be, for example, transistor elements. For example, the plurality of switching elements provided in the power input unit 310 may be a bipolar junction transistor (BJT) or a field effective transistor (FET).

The power input unit 310 may receive signals, for example, from the charging unit 320 and the control unit 350 to control the path through which the AC power is transmitted is changed. For example, the power input unit 310 may receive a switching signal S1 that controls the operation of any one of the plurality of switching elements from the charging unit 320. For example, the power input unit 310 may receive, from the control unit 350, a switching signal S2 that controls the operation of the remaining switching elements except for the switching elements controlled by the charging unit 320 among the plurality of switching elements. Can be.

The charging unit 320 may be connected to, for example, a commercial AC power supply 301.

The charging unit 320 may store a predetermined voltage based on, for example, an AC power delivered from the commercial AC power 301. The charging unit 320 may include, for example, a capacitor (not shown) that stores voltage (hereinafter, a charging capacitor).

The charging unit 320 may control the power input unit 310 so that, for example, a path through which AC power is transmitted is changed. The charging unit 320 may output, for example, a switching signal S1 that controls the operation of any one of a plurality of switching elements provided in the power input unit 310.

The charging unit 320 may output, for example, a switching signal S1 that controls the operation of any one of a plurality of switching elements provided in the power input unit 310 based on the voltage stored in the charging unit 320. have. For example, when a voltage equal to or greater than a predetermined voltage value is applied to both ends of the charging capacitor, the charging unit 320 controls a switching signal to control one of a plurality of switching elements provided in the power input unit 310 to be turned on ( S1) can be output.

The charging unit 320 may include, for example, a switching element (hereinafter, a switching element for discharging) (not shown) for stepping down the voltage stored in the charging unit 320. For example, when the switching element for discharge is turned on, the voltage applied to both ends of the charging capacitor may be stepped down.

At this time, when a voltage less than a predetermined voltage value is applied to both ends of the charging capacitor according to the operation of the switching device for discharging, a switching signal for controlling one of a plurality of switching elements provided in the power input unit 310 to be turned off (S1) can be output.

The charging unit 320 may receive, for example, a signal that controls the stored voltage to be stepped down from the voltage step-up unit 340. For example, the charging unit 320 may receive a switching signal S3 that controls the operation of the switching element for discharge.

In this drawing, although the operation of the switching element for discharge is illustrated as being controlled by the voltage step-down unit 340, the present invention is not limited thereto, and may be controlled by the control unit 350.

The rectifying unit 330 may, for example, rectify and output the input AC power to DC power. In this case, the AC power may be, for example, a single-phase AC power or a three-phase AC power.

The rectifier 330 may include, for example, a bridge diode. For example, the upper and lower arm diode elements are connected in series with each other, and a total of two or three pairs of upper and lower arm diode elements may be connected in parallel with each other.

The rectifying unit 330 may further include, for example, a switching element. In this case, the AC power may be rectified according to the switching operation of the switching element.

The dc stage capacitor C1 may be connected to, for example, an output terminal of the rectifier 330, and smooth and store power output from the rectifier 330. In the drawing, a single device is illustrated as a dc terminal capacitor C1, but the present invention is not limited thereto, and a plurality of devices are provided to secure device stability.

The voltage step-down unit 340 may output a DC voltage using, for example, a voltage applied to both ends of the dc terminal capacitor C1. For example, the voltage step-down unit 340 may step down the voltage at both ends of the dc stage capacitor C1 and output the step-down voltage.

The voltage step-down unit 340 may include, for example, a switching mode power supply (SMPS). The voltage step-down unit 340 may output voltages of various sizes (eg, 5V, 7.5V, 10V, 15V, etc.) required by circuit elements provided in the home appliance, for example.

The voltage step-down unit 340 may control, for example, the voltage stored in the charging unit 320 to be stepped down. For example, the voltage step-down unit 340 may output a switching signal S3 that controls the operation of the switching element for discharge to the charging unit 320. In this case, the switching signal S3 that controls the operation of the switching element for discharge may be, for example, a signal based on the voltage output from the voltage step-down unit 340.

The control unit 350 may be connected to each component provided in the power supply device 300, for example. The control unit 350 can transmit and receive signals to and from each other, for example, and control the overall operation of each component.

The control unit 350 may control the power input unit 310 such that a path through which AC power is transmitted is changed, for example. The control unit 350, for example, among the plurality of switching elements provided in the power input unit 310, the switching signal (S2) for controlling the operation of the remaining switching elements except for the switching element controlled by the charging unit 320 Can print

Meanwhile, when the DC voltage is output from the voltage step-down unit 340, the control unit 350 may control the power input unit 310 so that the path through which the AC power is transmitted is changed. For example, the control unit 350 may receive the DC voltage output from the voltage step-down unit 340 as a driving voltage for driving the control unit 350, and when the driving voltage is received, AC power is transmitted. The power input unit 310 may be controlled to change the path.

The control unit 350 may control the power input unit 310 so that the path through which AC power is transmitted is changed, for example, when the operation mode of the home appliance is changed from a driving mode to a standby power mode. For example, when the operation mode of the home appliance is changed from a driving mode to a standby power mode, the control unit 350 controls switching so that the remaining switching elements except for the switching elements controlled by the charging unit 320 are turned off. The signal S2 can be output.

Here, the driving mode may mean, for example, a mode that performs a predetermined function according to the operation of each component provided in the home appliance. Meanwhile, the standby power mode may mean, for example, a mode for cutting off power supplied to the home appliance and stopping an operation related to a driving mode performed in the home appliance.

The control unit 350, for example, when a driving voltage is received from the voltage step-down unit 340 while the operation mode of the home appliance is in the standby power mode, outputs AC power from the power input unit 310 for a predetermined time. , The power input unit 310 can be controlled. For example, the control unit 350 controls switching such that among the plurality of switching elements provided in the power input unit 310, the switching elements other than the switching element controlled by the charging unit 320 are turned on for a predetermined period of time. The signal S2 can be output.

The control unit 350 may control the power input unit 310 such that the path through which AC power is transmitted is changed, for example, when the operation mode of the home appliance is changed from a standby power mode to a driving mode. For example, when the operation mode of the home appliance is changed from a standby power mode to a driving mode, the control unit 350 controls switching such that the remaining switching elements except for the switching elements controlled by the charging unit 320 are turned on. The signal S2 can be output.

FIG. 2 is an internal circuit diagram of the power supply of FIG. 1 according to an embodiment of the present invention.

Referring to FIG. 2, the power input unit 310 may include, for example, a plurality of switching elements Ry1 and Ry2. In the present invention, although the power input unit 310 is described as having two switching elements Ry1 and Ry2, the present invention is not limited thereto, and three or more switching elements may be provided.

The first switching element Ry1 and the second switching element Ry2 may be, for example, relays that are turned on or off based on a current flowing through the coil.

The first switching element Ry1 may be turned on or off according to, for example, a voltage applied to both ends of the charging capacitor C2 provided in the charging unit 320. For example, the first switching element Ry1 may be turned on when a voltage equal to or greater than a predetermined voltage is applied to both ends of the charging capacitor C2 provided in the charging unit 320.

The first switching element Ry1 may be turned on or off based on, for example, a current flowing through the coil L connected to both ends of the charging capacitor C2 provided in the charging unit 320. have.

The second switching element Ry2 may be turned on or off, for example, based on the switching signal S2 output from the control unit 350. In the present invention, since the contents of the coil corresponding to the second switching element Ry2 are general contents to those skilled in the art to which the present invention belongs, detailed descriptions thereof will be omitted.

The charging unit 320 includes, for example, a one-way conduction element D, a first resistance element R1, a second resistance element R2, a discharge switching element Tr, and/or a charging capacitor C2. can do.

The one-way conduction element D may be, for example, a diode element. The one-way conduction element D may be connected in series with the first resistance element R1, for example.

The one-way conduction element D and the first resistor element R1 connected in series may be connected, for example, between a commercial AC power source 301 and a charging capacitor C2.

For example, the one-way conduction element D may be connected between the commercial AC power source 301 and the first resistance element R1, and the first resistance element R1 may include a one-way conduction element D and a charging capacitor ( C2).

Meanwhile, the one-way conduction element D may be arranged such that current flows from the commercial AC power supply 301 to the charging capacitor C2. For example, when the one-way conduction element D is a diode element, the anode may be connected to a commercial AC power source 301 and the cathode to the first resistor element R1.

The second resistor element R2 may be connected in series with, for example, the switching element Tr for discharge.

The resistance value of the second resistance element R2 may be smaller than, for example, the first resistance element R1.

The second resistance element R2 connected in series and the switching element Tr for discharge may be connected to both ends of the charging capacitor C2, for example.

For example, the second resistor element R2 may be connected between one end of the charging capacitor C2 connected to the first resistor element R1 and the switching element Tr for discharge, and the switching element for discharge ( Tr) may be connected between the other terminal of the charging capacitor C2 connected to the ground terminal and the second resistor element R2.

The switching element Tr for discharge may be, for example, a transistor element. The switching element Tr for discharge may be, for example, a bipolar junction transistor BJT. For example, when the switching element for discharge Tr is a bipolar junction transistor BJT, a signal may be input to the base end of the switching element for discharge Tr, and the switching element for discharge based on the input signal ( Tr) can operate. In this case, the variable voltage signal may be, for example, a pulse width modulation (PWM) signal.

The charging capacitor C2 may store, for example, a pulsation voltage from the one-way conduction element D and the first resistance element R1.

The charging capacitor C2 may be connected to, for example, a coil L corresponding to the first switching element Ry1. For example, according to the voltage applied to both ends of the charging capacitor C2, a current may flow through the coil L corresponding to the first switching element Ry1. At this time, the current in the coil L corresponding to the first switching element Ry1 may be, for example, a switching signal S1 that controls the operation of the first switching element Ry1.

The voltage step-down unit 340 may, for example, step down the voltage at both ends of the dc stage capacitor C1, and output the step-down voltage. For example, the voltage step-down unit 340 may step down the voltage at both ends of the dc terminal capacitor C1 and output a voltage of DC 5V.

Meanwhile, the power supply device 300 may further include, for example, at least one capacitor storing DC voltage output from the voltage step-down unit 340. In this drawing, one capacitor C3 for storing the voltage of DC 5V output from the voltage step-down unit 340 is illustrated, but the present invention is not limited thereto, and the power supply device 300 includes a plurality of capacitors. It may include.

Meanwhile, the voltage step-down unit 340 may output, for example, a switching signal S3 that controls the operation of the discharge switching element Tr to the charging unit 320. For example, the voltage step-down unit 340 may output a switching signal S3 that controls the operation of the discharge switching element Tr by outputting a voltage of DC 5V.

Meanwhile, the voltage output from the voltage step-down unit 340 may be, for example, a driving voltage for driving the control unit 350.

The control unit 350 may control, for example, the operation of the second switching element Ry2 by outputting the switching signal S2. For example, according to the switching signal S2 output from the control unit 350, a current may flow in a coil corresponding to the second switching element Ry2, and based on this, the second switching element Ry2 is turned- It can be turned on or off.

3A and 3B are diagrams referred to for explanation of the operation of the power supply, according to an embodiment of the present invention.

Referring to Figure 3a, when the operation mode of the home appliance is a standby power mode, both the first switching element (Ry1) and the second switching element (Ry2) can be turned off, AC power to the rectifier 330 Supply may be cut off.

Meanwhile, in the state in which both the first switching element Ry1 and the second switching element Ry2 are turned off, the charging capacitor provided in the charging unit 320 by the AC power delivered from the commercial AC power 301 ( A voltage above a predetermined voltage value may be stored in C2).

When a voltage equal to or greater than a predetermined voltage value is applied to both ends of the charging capacitor C2, the first switching element Ry1 is turned on according to a current flowing through the coil L corresponding to the first switching element Ry1. Can be.

When the first switching element Ry1 is turned on, AC power may be supplied to the rectifying unit 330 through the first switching element Ry1, and a dc terminal capacitor may be provided by a DC power output from the rectifying unit 330. DC voltage may be stored in (C1). In this case, the voltage step-down unit 340 may step down the voltage applied to both ends of the dc terminal capacitor C1 to output a voltage of DC 5V.

The control unit 350 may receive a voltage of DC 5V output from the voltage step-down unit 340 as a driving voltage.

Meanwhile, a switching signal S3 for controlling the operation of the discharge switching element Tr may be output to the discharge switching element Tr by the voltage of DC 5V output from the voltage step-down unit 340.

Referring to Figure 3b, by the switching signal (S3) output from the voltage step-down unit 340, the switching element for discharge (Tr) can be turned on, from the commercial AC power supply 301 to the charging unit 320 The input voltage may be distributed by the first resistor element R1 and the second resistor element R2.

On the other hand, the resistance value (for example, 1 k2) of the second resistor element R2 is controlled so that the voltage input from the commercial AC power source 301 to the charging part 320 is mostly applied to both ends of the first resistor element R1. 1 may be significantly smaller than the resistance value of the resistance element R1 (eg, 386 M386).

At this time, the voltage applied to both ends of the charging capacitor C2 may be stepped down below a predetermined voltage value, and according to the current flowing through the coil L corresponding to the first switching element Ry1, the first switching element Ry1 ) Can be turned off.

Meanwhile, as the operation mode of the home appliance is the standby power mode, the control unit 350 receives the driving voltage of DC 5V from the voltage step-down unit 340, so that the control unit 350 includes the second switching element Ry2. It is possible to output the switching signal (S2) to control the turn-on for a predetermined time to the second switching element (S2).

The second switching element Ry2 may be turned on according to the switching signal S2 output from the control unit 350, and AC power may be supplied to the rectifying unit 330 through the second switching element Ry2. Can be.

On the other hand, when a predetermined time elapses, the second switching element Ry2 may be turned off, and as both the first and second switching elements Ry1 and Ry2 are turned off, the rectifier 330 may be turned off. The supply of AC power is cut off.

4 is a view referred to for explanation of the operation of switching elements provided in a power supply according to an embodiment of the present invention.

Reference numeral (a) in FIG. 4 indicates voltages applied to both ends of the charging capacitor C2, and reference numerals (b) to (d) indicate the first switching element Ry1, the second switching element Ry2, and the room. It can be seen that the operation of the dedicated switching element Tr is shown respectively.

Referring to FIG. 4, the charging capacitor C2 may charge a voltage based on the resistance value of the first resistor element R1 and the capacitance of the charging capacitor C2. For example, when the resistance value of the first resistor element R1 is 386 MΩ and the capacitance of the charging capacitor C2 is 47 μF, the voltage applied to both ends of the charging capacitor C2 for 15 minutes is 0 V to 15 V. Can be changed to

The first switching element Ry1 may be turned on when a voltage of 15 V or more is applied to both ends of the charging capacitor C2, and may be turned off when a voltage of less than 15 V is applied.

Meanwhile, when the first switching element Ry1 is turned on and a voltage equal to or higher than a predetermined voltage value is applied to both ends of the dc terminal capacitor C1, a voltage of DC 5V may be output from the voltage step-down unit 340. .

At this time, the voltage of the DC 5V output from the voltage step-down unit 340 may be received as the driving voltage, the switching signal S2 is output from the control unit 350, and the second switching element Ry2 Can be turned on.

In addition, by the voltage of the DC 5V output from the voltage step-down unit 340, the switching signal (S3) for controlling the operation of the switching element for discharge (Tr) can be output to the switching element for discharge (Tr), The dedicated switching element Tr can be turned on.

As the switching switching element Tr for discharge is turned on, the voltage applied to both ends of the charging capacitor C2 may be stepped down below a predetermined voltage value, and the first switching element Ry1 may be turned off. .

Meanwhile, the control unit 350 may control the switching element Ry2 to be turned on for a predetermined period of time. When the second switching element Ry2 is turned off after a predetermined period of time, the voltage at both ends of the dc terminal capacitor C1 becomes less than a predetermined voltage value, and a voltage of DC 5V is not output from the voltage step-down unit 340. It may not. At this time, when the voltage of the DC 5V is not output from the voltage step-down unit 340, the switching element for discharge Tr may be turned off, and the charging capacitor C2 may charge the voltage again.

As described above, according to various embodiments of the present disclosure, power supply to the home appliance may be cut off during a predetermined time in the standby power mode, that is, a voltage over a predetermined voltage value in the charging capacitor C2. Through this, by periodically performing an operation to cut off the power supply, the amount of power consumption in the standby power mode can be more effectively reduced.

5 is a diagram illustrating a configuration of an air conditioner, which is an example of a home appliance, according to an embodiment of the present invention.

Referring to FIG. 5, the air conditioner 100a according to an embodiment of the present invention may include an indoor unit 31a and an outdoor unit 21a connected to the indoor unit 31a.

The indoor unit 31a of the air conditioner may be, for example, any one of a stand type air conditioner, a wall-mounted air conditioner, and a ceiling type air conditioner, but in the drawing, the stand type indoor unit 31a is exemplified. do.

Meanwhile, the air conditioner 100a may further include at least one of a ventilation device, an air cleaning device, a humidifying device, and a heater, for example, and may operate in conjunction with the operation of the indoor unit and the outdoor unit.

The outdoor unit 21a is, for example, a compressor (not shown) that receives and compresses refrigerant, and an outdoor heat exchanger (not shown) that exchanges heat between the refrigerant and outdoor air, and extracts gas refrigerant from the supplied refrigerant to the compressor. It may include an accumulator (not shown) to supply, and a four-way valve (not shown) for selecting a flow path of the refrigerant according to the heating operation. In addition, a plurality of sensors, valves, and an oil recovery unit are further included, but a description of the configuration will be omitted below.

The outdoor unit 21a may, for example, operate a compressor and an outdoor heat exchanger provided to compress or heat exchange the refrigerant according to the setting to supply the refrigerant to the indoor unit 31a. The outdoor unit 21a may be driven by, for example, a remote controller (not shown) or a demand of the indoor unit 31a. At this time, as the cooling/heating capacity is changed corresponding to the driven indoor unit, it is possible that the number of operation of the outdoor unit and the number of operation of the compressor installed in the outdoor unit are variable.

At this time, the outdoor unit 21a may supply compressed refrigerant to the connected indoor unit 310a, for example.

The indoor unit 31a may receive coolant from the outdoor unit 21a, for example, and discharge cold air into the room. The indoor unit 31a may include, for example, an indoor heat exchanger (not shown), an indoor fan (not shown), an expansion valve (not shown) for expanding the supplied refrigerant, and a plurality of sensors (not shown). Can be.

At this time, the outdoor unit (21a) and the indoor unit (31a), for example, is connected by a communication line can transmit and receive mutual data, and a remote controller (not shown) and wired or wirelessly connected, the remote controller (not shown) It can operate under control.

The remote controller (not shown) may be connected to, for example, the indoor unit 31a, input a user's control command to the indoor unit 31a, and receive and display status information of the indoor unit 31a. At this time, the remote control may communicate by wire or wireless depending on the connection type with the indoor unit 31a.

6 is a schematic diagram of the outdoor unit and the indoor unit of FIG. 5 according to an embodiment of the present invention.

Referring to FIG. 6, the air conditioner 100a according to an embodiment of the present invention may be largely divided into an outdoor unit 21a and an indoor unit 31a.

The outdoor unit 21a includes, for example, a compressor 102a serving to compress the refrigerant, a compressor electric motor 102ab driving the compressor 102a, and an outdoor heat exchanger serving to dissipate the compressed refrigerant. Outdoor fan (105a) consisting of an electric fan (105a) for rotating the outdoor fan (105aa) and the outdoor fan (105aa), which is disposed on one side of the outdoor heat exchanger (104a) and promotes heat dissipation of the refrigerant, The expansion mechanism (106a) for expanding the condensed refrigerant, the cooling/heating switching valve (110a) for changing the flow path of the compressed refrigerant, and the vaporized refrigerant is temporarily stored to remove moisture and foreign matter, and then the refrigerant at a constant pressure is compressed. It may include an accumulator (103a) supplied to the.

The indoor unit 31a is, for example, an indoor heat exchanger 108a disposed indoors to perform a cooling/heating function, and an indoor fan arranged on one side of the indoor heat exchanger 108a to promote heat dissipation of the refrigerant. It may include an indoor blower (109a) consisting of (109aa) and the electric motor (109ab) for rotating the indoor fan (109aa).

At least one indoor heat exchanger 108a may be installed, for example. As the compressor 102a, for example, at least one of an inverter compressor and a constant speed compressor may be used.

In addition, the air conditioner 100a may be configured with, for example, a cooler that cools the room, or a heat pump that cools or heats the room.

7 is a perspective view illustrating a refrigerator, which is an example of a home appliance, according to an embodiment of the present invention.

Referring to FIG. 7, the refrigerator 100b according to the present invention, although not illustrated, shields a case 110b having an internal space divided into a freezer compartment and a freezer compartment, and a freezer door 120b shielding the freezer compartment and a refrigerator compartment A schematic appearance may be formed by the refrigerator compartment door 140b.

And, the front of the freezer compartment door (120b) and the freezer compartment door (140b) is further provided with a door handle (121b) protruding forward, the user can easily grip and rotate the freezer compartment door (120b) and the refrigerator compartment door (140b) I can do it.

On the other hand, on the front of the refrigerator compartment door 140b, for example, a home bar 180b, which is a convenient means for allowing a user to take out storage items such as drinks contained therein, without opening the refrigerator compartment 140b, is further provided. It may be provided.

And, the front of the freezer compartment door 120b, for example, may be provided with a dispenser 160b, which is a convenient means for allowing a user to easily take out ice or drinking water without opening the freezer compartment door 120b. On the upper side of the dispenser 160b, a control panel 210b that controls a driving operation of the refrigerator 100b and shows the state of the refrigerator 100b in operation on a screen may be further provided.

Meanwhile, in the drawing, the dispenser 160b is illustrated as being disposed on the front side of the freezer compartment door 120b, but is not limited thereto, and may be disposed on the front side of the refrigerator compartment door 140b.

On the other hand, the inner upper portion of the freezer (not shown), for example, using the cold air in the freezer icemaker 190b for ice-watering water, and ice frozen in the ice machine is frozen and contained inside the freezer (not shown) An ice bank 195b mounted on the may be further provided. In addition, although not shown in the drawing, an ice suit (not shown) that guides ice contained in the ice bank 195b to be dropped to the dispenser 160b may be further provided.

The control panel 210b may include, for example, an input unit 220b composed of a plurality of buttons, and a display unit 230b displaying a control screen and an operation state.

The display unit 230b displays information such as, for example, a control screen, an operating state, and a high internal temperature. For example, the display unit 230b may display a dispenser service type (each ice, water, or piece of ice), a set temperature of the freezer, and a set temperature of the refrigerator.

The display unit 230b may be implemented in various ways, such as a liquid crystal display (LBD), a light emitting diode (LED), or an organic light emitting diode (OLED). Also, the display unit 230b may be implemented as a touch screen capable of performing the function of the input unit 220b.

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

On the other hand, the refrigerator according to an embodiment of the present invention is not limited to the double door type (double door type) shown in the drawing, one door type (one door type), sliding door type (sliding door type), curtain door type (curtain door type).

8 is a diagram briefly showing a configuration of the refrigerator of FIG. 7 according to an embodiment of the present invention.

Referring to FIG. 8, the refrigerator 100b receives, for example, a compressor 112b, a condenser 116b condensing the refrigerant compressed by the compressor 112b, and a refrigerant condensed from the condenser 116b. The evaporator may include a freezer compartment evaporator 124b disposed in a freezer compartment (not shown) and a freezer compartment expansion valve 134b that expands refrigerant supplied to the freezer compartment evaporator 124b.

Meanwhile, in the drawings, one evaporator is illustrated, but it is also possible to use each evaporator in the refrigerating compartment and the freezing compartment.

That is, the refrigerator 100b is a three-way valve that supplies the refrigerant condensed in the refrigerator evaporator (not shown) and the condenser 116b disposed in the refrigerator (not shown) to the refrigerator evaporator (not shown) or the freezer evaporator 124b. (Not shown) and a refrigerating compartment expansion valve (not shown) that expands the refrigerant supplied to the refrigerating compartment evaporator (not shown).

In addition, the refrigerator 100b may further include a gas-liquid separator (not shown) in which the refrigerant passing through the evaporator 124b is separated into liquid and gas.

In addition, the refrigerator 100b further includes a refrigerating compartment fan (not shown) and a freezing compartment fan 144b that sucks cold air that has passed through the freezer compartment evaporator 124b and blows them into the refrigerating compartment (not shown) and the freezing compartment (not shown), respectively. can do.

In addition, a compressor driving unit 113b for driving the compressor 112b, and a refrigerator compartment fan driving unit (not shown) and a freezing compartment fan driving unit 145b for driving the refrigerator compartment fan (not shown) and the freezer compartment fan 144b may be further included. have.

On the other hand, according to the drawings, since a common evaporator 124b is used in the refrigerating compartment and the freezing compartment, in this case, a damper (not shown) may be installed between the refrigerating compartment and the freezing compartment, and a fan (not shown) is one evaporator. The generated cold air can be forcedly blown to be supplied to the freezing and refrigerating compartments.

The accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and technical scope of the present invention It should be understood to include water to substitutes.

Likewise, although the operations are depicted in the drawings in a particular order, it should not be understood that such operations should be performed in the particular order shown or in sequential order, or that all shown actions should be performed in order to obtain the desired result. . In certain cases, multitasking and parallel processing may be advantageous.

In addition, although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. In addition, various modifications can be carried out by a person having ordinary knowledge, and these modifications should not be individually understood from the technical idea or prospect of the present invention.

300: power supply
301: commercial AC power
310: power input
320: live parts
330: rectifier
340: voltage step-down part
350: control unit
C1: dc stage capacitor

Claims (10)

A power input unit having a plurality of switching elements connected to a commercial AC power supply to change a path to which the commercial AC power is supplied;
A charging unit connected to the commercial AC power supply and controlling an operation of the first switching element among the plurality of switching elements; And
Of the plurality of switching elements, including a control unit for controlling the operation of the second switching element,
The charging unit,
One-way conduction element;
A first resistance element connected in series to the one-way conduction element;
A capacitor storing pulsation voltages from the one-way conduction element and the first resistance element;
A second resistor element having one end connected to one end of the capacitor; And
And a third switching element connected between the other end of the second resistor element and the other end of the capacitor,
Power supply device, characterized in that for controlling the operation of the first switching element, based on the voltage across the capacitor. According to claim 1,
The one-way conduction element and the first resistance element,
It is connected between the commercial AC power supply and the capacitor,
The capacitor,
Power supply device characterized in that it is connected between the one-way conduction element and the first resistor element and a ground terminal. According to claim 2,
The second resistance element and the third switching element,
Power supply characterized in that they are connected in series with each other, and are connected in parallel to both ends of the capacitor. According to claim 3,
The resistance value of the second resistance element is a power supply device, characterized in that less than the resistance value of the first resistance element. The method of claim 4,
The first switching element,
Power supply device characterized in that the relay is operated by a coil through which a current flows according to the voltage across the capacitor. The method of claim 5,
The third switching element,
When the second switching element is turned on, the power supply device characterized in that it is turned on. The method of claim 6,
It is further connected to the power input unit, further comprising a power conversion unit for rectifying the AC power to output a DC power,
The control unit,
When the DC power is output through the power conversion unit, the power supply device, characterized in that for controlling the operation of the second switching element. The method of claim 7,
The third switching element,
Power supply device characterized in that it operates according to the output of the power converter. The method of claim 7,
The third switching element,
Power supply device characterized in that it operates under the control of the control unit. A home appliance comprising the power supply of claim 1.

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