KR20110013976A - Air conditioner - Google Patents

Abstract

PURPOSE: An air conditioner is provided to enable DC voltage to be supplied to a main power supply unit for an indoor unit even if the main power supply to the indoor is blocked since a standby power supply unit for an outdoor unit is operated by a relay unit for the outdoor unit. CONSTITUTION: An air conditioner comprises a main power supply unit(310), a standby power supply unit(342), a relay unit(316), and a connector(330). The main power supply unit outputs converted DC voltage from main AC power. The standby power supply unit outputs converted DC voltage from standby AC power. If power from the main power supply unit is blocked, the relay unit operates the standby power supply unit and supplies the DC voltage, which is output by the standby power supply unit, to the main power supply unit. The connector connects the main power supply unit to the standby power supply unit.

Description

Air Conditioner

The present invention relates to an air conditioner, and more particularly, to an air conditioner capable of satisfying standby power without providing a plurality of standby power supply units in an outdoor unit.

In general, an air conditioner is a home appliance for maintaining indoor air in a most suitable state. For example, in the summer, the room is cooled in a cool state, in the winter, the room is heated in a warm state, and also the humidity in the room, and the air in the room is adjusted to a comfortable clean state.

That is, the air conditioner is installed to provide a more comfortable indoor environment to humans by discharging cold air into the room to adjust the indoor temperature and purifying the indoor air to create a comfortable indoor environment. In general, an air conditioner includes an outdoor unit configured as a heat exchanger and an indoor unit installed indoors and a compressor and a heat exchanger to supply a refrigerant to the indoor unit.

At this time, the air conditioner is separated and controlled by an indoor unit composed of a heat exchanger and an electronic expansion valve and the like, and an outdoor unit composed of a compressor and a heat exchanger, and is operated by controlling power supplied to a compressor, an electronic expansion valve, or a heat exchanger. In addition, the air conditioner may be connected to at least one indoor unit to the outdoor unit, and supplies the refrigerant to the indoor unit in accordance with the requested operating state, it is operated in the cooling or heating mode.

However, even when the indoor unit is disconnected from the main power supply, standby power for communication between the indoor unit and the remote controller is required. Accordingly, a plurality of standby power supply units may be provided in the outdoor unit to satisfy the standby power, but the plurality of standby power supply units may be provided in the outdoor unit, thereby increasing the size of a printed circuit board (PCB) provided in the outdoor unit and providing logic. There is a problem with this complexity.

An object of the present invention, even if the main power supply of the indoor unit is cut off, the relay unit provided in the outdoor unit operates the outdoor unit standby power supply unit to satisfy the standby power by providing a DC voltage output by the standby power supply unit to the indoor unit main power supply unit. To provide an air conditioner.

The air conditioner according to the present invention, the main power supply for outputting the DC voltage converted from the input main AC power supply, the standby power supply for outputting the DC voltage converted from the input standby AC power supply and the power supply by the main power supply is cut off If so, it includes a relay unit for operating the standby power supply unit so that the DC voltage output by the standby power supply unit is provided to the main power supply unit.

The relay unit may include a relay for operating the standby power supply unit and a relay driver for driving the relay when the power supply by the main power supply unit is interrupted.

According to the present invention, even if the main power supply of the indoor unit is cut off, the relay unit provided in the outdoor unit operates the outdoor unit standby power supply unit so that the DC voltage outputted by the standby power supply unit is provided to the indoor unit main power supply unit to satisfy the standby power. have.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a view showing an air conditioner system according to an embodiment of the present invention.

1, the air conditioner system according to the present invention includes a plurality of units, such as an indoor unit for discharging cold air into the room, an outdoor unit connected to the indoor unit. In particular, a plurality of indoor units are connected to the outdoor unit, and the outdoor unit supplies a coolant to the plurality of connected indoor units. At this time, the number of the outdoor unit and the indoor unit is not limited to the drawing. The air conditioner of the present invention can be applied to any case, such as a stand-type air conditioner, a wall-mounted air conditioner or a ceiling-type air conditioner, the body is also a system air conditioner in which a unit including a plurality of outdoor units and outdoor units connected to a remote controller Applicable

That is, the air conditioner system may further include a local controller (R) connected to the indoor unit and inputting an operation command to the indoor unit, and a remote controller (RC) connected to a plurality of units to control and monitor the operation.

Here, the air conditioner may include an indoor unit (I) and an outdoor unit (O) unit, and may further include a unit such as an air cleaning unit, a ventilation unit, a humidification unit, a dehumidification unit, and a heater, and the unit may include a remote controller (RC). ) Can be integrated control. Hereinafter, the indoor unit (I) and the outdoor unit (O) will be described as an example, but may also be applied to the case where the above units are connected.

At least one indoor unit (I) may be provided in one room, and one or more outdoor units (O) are driven by a request of at least one of the plurality of indoor units (I), and correspond to the driven indoor unit (I). As the cooling / heating capacity is variable, the number of operations of the outdoor unit O and the number of operations of the compressor installed in the outdoor unit O are variable. Here, the number of outdoor units may vary depending on the cooling and heating capacity according to the number of indoor units and the capacity of the compressor provided.

The outdoor unit O and the indoor unit I are connected through a refrigerant pipe to perform cooling or heating operation according to the flow of the refrigerant between the outdoor unit O and the indoor unit I, and mutual data according to a predetermined communication method. Send and receive.

 The local controller R is connected to the indoor unit I, displays the operating state of the connected indoor unit I, and transmits a control command corresponding to the input data to the indoor unit I. In this case, the local controller may be connected to the indoor unit by wire or wirelessly, and one-way or two-way communication may be performed according to a communication method.

The remote controller RC is connected to a plurality of units to control the operation thereof, as well as to set the operation schedule of each unit and to operate according to the set schedule.

In addition, the air conditioner may further include a distributor for decomposing the refrigerant to be supplied to the plurality of indoor units.

2 is a view showing the internal configuration of the outdoor unit and the indoor unit of the air conditioner according to an embodiment of the present invention.

Referring to FIG. 2, the outdoor unit O includes an outdoor heat exchanger 4 through which outdoor air and a refrigerant are heat exchanged, an outdoor blower 5 for blowing outdoor air to the outdoor heat exchanger 4, and extracts only a gas refrigerant. The accumulator 3, the compressor 2 for compressing the gas refrigerant extracted from the accumulator 3, the four-way valve 10 for switching the refrigerant flow, and the outdoor electronic expansion controlled according to the supercooling degree and the superheat degree during the heating operation. A valve 6.

The outdoor heat exchanger (4) acts as a condenser to suck the gaseous refrigerant during the cooling operation of the air conditioner and condense the sucked gaseous refrigerant by the outdoor air, and during the heating operation of the air conditioner, the liquid refrigerant is sucked and suctioned. It acts as an evaporator that allows the liquid refrigerant to be evaporated by the outdoor air.

The outdoor blower 5 is connected to the outdoor electric motor 5b, which is controlled by an outdoor unit controller (not shown) to generate power, and is rotated by the power of the outdoor electric motor 5b to be connected to the outdoor electric motor 5b. It consists of the outdoor fan 5a which generate | occur | produces.

The main outdoor unit may include two compressors therein, one may be an inverter compressor, and the other may be a constant speed compressor. Meanwhile, the sub outdoor unit may also include two compressors, and both compressors may be constant speed compressors, but this is merely an example and the present invention is not limited thereto.

The plurality of outdoor units are provided with a main outdoor unit and an auxiliary outdoor unit, and are driven by the request of at least one of the plurality of indoor units. At this time, in response to the number of indoor units operated, the main outdoor unit is operated, and as the required cooling / heating capacity is changed, the auxiliary outdoor unit is operated when it exceeds the capacity of the main outdoor unit. That is, the operation number of the outdoor unit and the operation of the compressor provided in the outdoor unit vary according to the required cooling / heating capacity.

The indoor unit (I) blows the indoor heat exchanger (8) through which the indoor air of the room where each indoor unit (I) is installed and the refrigerant are heat exchanged, and the indoor air in the room where the indoor unit (I) is installed, to the indoor heat exchanger (8). It may include an indoor blower (9), and an indoor expansion valve (not shown) that is an indoor flow rate control unit controlled according to the supercooling and superheating degree during the cooling operation.

The indoor heat exchanger (8) acts as an evaporator to allow the indoor air to be cooled while the liquid refrigerant is sucked in the cooling operation of the air conditioner and the sucked liquid refrigerant is evaporated by the indoor air in which the indoor unit (I) which requests the cooling operation is installed. The gaseous refrigerant is sucked during the heating operation of the air conditioner, and the sucked gaseous refrigerant is condensed by the indoor air in which the indoor unit I, which has requested the heating operation, is acted as a condenser for raising the indoor air temperature.

The indoor blower 9 is controlled by an indoor unit controller (not shown) to generate power by being connected to the indoor electric motor 9b and the indoor electric motor 9b to be rotated by the indoor electric motor 9b. It consists of an indoor fan 9a.

3 is a view showing the configuration of an air conditioner according to an embodiment of the present invention, Figure 4 is a view showing the configuration of a relay unit according to an embodiment of the present invention.

Referring to the drawings, an air conditioner according to an exemplary embodiment of the present invention includes an outdoor unit 310 including a first power supply unit 312, a first control unit 314, a relay unit 316, and a first AC Com 318. , A connector 330 including a first connector 332, a second connector 334, and a third connector 336, a second power supply 342, a second controller 344, and a second AC Com 346. And an indoor unit 340 including a receiver 348 for communicating with the remote controller 350.

The first power supply 312 may output the DC voltage converted from the input AC power to the first controller 314. In addition, the first power supply unit 312 may output the DC voltage converted from the input AC power to the second power supply unit 342 through the second connection unit 334 of the connector 330. The first power supply 312 may be provided as a standby power supply.

The second power supply unit 342 may output the DC voltage converted from the input AC power to the second control unit 344. The second power supply unit 342 may be provided as a main power supply unit.

In this case, the first power supply unit 312 and the second power supply unit 342 may be provided as a switching mode power supply (SMPS), which is an AC power supplied from a commercial power source, a computer, a communication device, Modular power supply that converts to suit various devices such as home appliances.

Intermittent control at high frequency using high-speed power semiconductor, and stable DC voltage through rectification and smoothing circuit. DC power supplies are classified into linear type and switch mode type. Recently, the switch mode type suitable for light weight and miniaturization is becoming the main power supply of personal computer (PC) and home appliance electronic products. Resonant circuit is the most efficient conversion method and is mainly used for laptop adapters.

In addition, the switching mode power supply (SMPS) may include at least one of an AC power input unit, a filter unit, a smoothing unit, a switching unit, and a feedback unit.

The filter unit filters a noise component or a harmonic current component of a commercial AC power supply. To this end, the filter unit may include a reactor element or a capacitor element.

In addition, to remove the harmonic current, the filter unit may be provided as a common mode LCL filter. When the commercial AC power supply is a three-phase AC power supply, the magnitude of the harmonic current generated by the high speed switching may be increased, and in order to effectively limit this, a common mode LCL filter may be used.

The switching unit converts the commercial AC power passed through the filter unit into DC power and outputs the DC power. The commercial AC power source may be a single phase AC power source or a three phase AC power source. The internal structure of the switching unit also varies according to the type of commercial AC power. For example, in the case of a single phase AC power supply, a half bridge type converter in which two switching elements and four diodes are connected may be used, and in the case of a three phase AC power supply, six switching elements and six diodes may be used.

In addition, the switching unit includes a switching element to perform the step-up operation and the DC power conversion by the switching operation. On the other hand, the switching unit may be made of a diode or the like to perform the rectifying operation without a separate switching operation.

The smoothing part is provided with a smoothing capacitor, which is connected to the output terminal of the switching part to smooth the converted DC power output from the switching part.

The feedback unit may be provided at an output terminal of the switching unit and may be provided as a DC voltage output unit.

The DC voltage output unit may output the voltage of the dc terminal which is both ends of the smoothing capacitor. To this end, the DC voltage output unit may include a resistor, an amplifier, or the like. The output voltage is a discrete signal in the form of a pulse and may be provided to a control unit for controlling switching.

As shown in FIG. 4, the relay unit 316 may include a relay driver 402 and a relay 404. When the power supply by the second power supply unit 342 is cut off, the first power supply unit ( 312 may be operated to provide a DC voltage output by the first power supply 312 to the second power supply 342.

In this case, the relay unit 316 receives a signal from the relay driver 402 for driving the relay 404 and the relay driver 402 when the power supply by the second power supply unit 342 is cut off. And a relay 404 for operating the power supply 312.

Meanwhile, the connector 330 connects the outdoor unit 310 and the indoor unit 320, and may include a first connection part 332, a second connection part 334, and a third connection part 336. In this case, the first connector 332 is connected to the relay unit 316 and the second power supply unit 342, and the second connector 334 is connected to the first power supply unit 312 and the second power supply unit 342. The third connector 336 may be connected to the first AC Com 318 and the second AC Com 346.

5 is a block diagram showing an internal configuration of a power supply unit according to an embodiment of the present invention.

Referring to FIG. 5, the power supply unit according to the present invention may include an AC power input unit 502, a smoothing unit 504, a switching control unit 506, a conversion unit 508, a switch unit 510, and feedback for receiving AC power. Section 512.

The smoothing unit 504 filters, rectifies, and outputs AC power input from the AC power input unit 502, and the switching controller 506 converts the AC unit 508 according to the secondary output voltage level of the converter 508 to be fed back. The on / off switching operation is repeatedly performed to convert the duty ratio of the primary on / off.

The converter 508 induces and outputs an output voltage proportional to the turns ratio to the secondary side according to the input power of the primary winding, and the number of different windings for supplying the first and second operating voltages to the switching controller 506. A plurality of tabs may be provided.

The converter 508 outputs the first operating voltage through a tap directly connected to the switching controller 506, and a tap for outputting the secondary operating voltage is connected through the switch unit 510. In addition, the converter 508 is designed so that the number of turns of the tap outputting the secondary operating voltage is larger than the number of turns of the tap outputting the primary operating voltage Vcc1.

The converter 508 is connected to various loads operating by receiving the output voltage induced on the secondary side of the converter 508, and the feedback unit 512 is connected to the output voltage induced on the secondary side of the converter 508. The error is detected, and the switching controller 506 feeds back the secondary output voltage level of the converter 508.

The switch unit 510 performs a switching operation for applying the first operating voltage and the second operating voltage output from the converter 508 as the operating voltage of the switching controller 506.

For example, the power supply unit according to the embodiment of the present invention is provided with a plurality of transformer taps of different winding number for the operating voltage of the switching controller 506 connected to the converter 508, one of which has a small load In addition to using as a source to be supplied to the first operating voltage of the switching control unit 506 at light load, the other is used as a source to be supplied to the second operating voltage of the switching control unit 506 during peak load with a large load, By switching the switch unit 510 in comparison with the secondary output voltage level of the converter unit 508 fed back through the feedback unit 512 and the burst level which is a reference voltage at light load, the operating voltage of the switching controller 508 is specified. It can operate stably within.

Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Accordingly, modifications of the embodiments of the present invention will not depart from the scope of the present invention.

1 is a view showing an air conditioner system according to an embodiment of the present invention.

2 is a view showing the internal configuration of the outdoor unit and the indoor unit of the air conditioner according to an embodiment of the present invention.

3 is a view showing the configuration of an air conditioner according to an embodiment of the present invention.

4 is a view showing the configuration of a relay unit according to an embodiment of the present invention.

5 is a block diagram showing an internal configuration of a power supply unit according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

312: first power supply unit 314: first control unit

316: relay 330: connector

342: second power supply unit 344: second control unit

Claims (6)

A main power supply for outputting a DC voltage converted from the input main AC power; A standby power supply for outputting a DC voltage converted from the input standby AC power; And And a relay unit configured to operate the standby power supply unit to supply a DC voltage output by the standby power supply unit to the main power supply unit when power supply by the main power supply unit is cut off. The method of claim 1, And the relay unit includes a relay for operating the standby power supply unit and a relay driver for driving the relay when the power supply by the main power supply unit is interrupted. The method of claim 1, And a connector connecting the main power supply unit and the standby power supply unit, wherein the connector includes one or more connection units. The method of claim 1, And the main power supply unit is provided in an indoor unit, and the standby power supply unit is provided in an outdoor unit. The method of claim 1, The main power supply unit is provided with a switching mode power supply (SMPS), the standby power supply is an air conditioner, characterized in that provided with a switching mode power supply (SMPS). The method of claim 5, The switching mode power supply (SMPS) comprises at least one of an AC power input unit, a smoothing unit, a switching control unit, a switch unit, a conversion unit and a feedback unit.

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