WO2022142201A1 - 空调室外机控制电路、电控组件及空调器 - Google Patents

空调室外机控制电路、电控组件及空调器 Download PDF

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Publication number
WO2022142201A1
WO2022142201A1 PCT/CN2021/102398 CN2021102398W WO2022142201A1 WO 2022142201 A1 WO2022142201 A1 WO 2022142201A1 CN 2021102398 W CN2021102398 W CN 2021102398W WO 2022142201 A1 WO2022142201 A1 WO 2022142201A1
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WO
WIPO (PCT)
Prior art keywords
power supply
outdoor unit
air conditioner
power
standby
Prior art date
Application number
PCT/CN2021/102398
Other languages
English (en)
French (fr)
Inventor
易文杰
章文凯
邓谷城
卢伟彬
Original Assignee
佛山市顺德区美的电子科技有限公司
广东美的制冷设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 佛山市顺德区美的电子科技有限公司, 广东美的制冷设备有限公司 filed Critical 佛山市顺德区美的电子科技有限公司
Publication of WO2022142201A1 publication Critical patent/WO2022142201A1/zh
Priority to US18/203,959 priority Critical patent/US20230332799A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20Electric components for separate outdoor units
    • F24F1/22Arrangement or mounting thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/50Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56Remote control
    • F24F11/58Remote control using Internet communication
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/88Electrical aspects, e.g. circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/89Arrangement or mounting of control or safety devices
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/005Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/0003Details of control, feedback or regulation circuits
    • H02M1/0032Control circuits allowing low power mode operation, e.g. in standby mode
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/0048Circuits or arrangements for reducing losses
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/42Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208Arrangements for improving power factor of AC input

Definitions

  • the present application relates to the technical field of electric control, and in particular, to a control circuit of an outdoor unit of an air conditioner, an electric control assembly and an air conditioner.
  • the main purpose of this application is to propose an air conditioner outdoor unit control circuit, an electronic control component and an air conditioner, which aim to reduce the power consumed by standby and meet the requirements of low energy consumption.
  • control circuit for an outdoor unit of an air conditioner includes:
  • the power input terminal is used to connect to the AC power supply
  • an external unit power supply circuit connected to the power input end, and used for converting the connected AC power into an external unit power supply;
  • a first electronic switch arranged in series between the power input terminal and the external power supply circuit
  • a standby power supply the input end of which is connected to the output end of the standby control power supply of the indoor unit, and the output end of which is connected to the controlled end of the first electronic switch, and the standby power supply is used for receiving the standby control power supply of the indoor unit
  • the first electronic switch is controlled to be closed.
  • the first electronic switch is a first relay, the first end of the first relay coil is connected to the ground end of the standby power supply; the second end of the first relay coil is the The controlled end of the first electronic switch, the static contact of the first relay is connected to the power input end, and the movable contact of the first relay is connected to the input end of the external power supply circuit.
  • the standby power supply is a non-isolated switching power supply
  • the input terminal of the non-isolated switching power supply is the input terminal of the standby power supply
  • the output terminal of the non-isolated switching power supply is the power supply the output terminal
  • the non-isolated switching power supply is used to convert the standby control power supply of the indoor unit into a DC voltage, so that the first relay is powered and pulled in.
  • the air conditioner outdoor unit control circuit further includes:
  • the second electronic switch is arranged in series between the power input terminal and the input terminal of the external power supply circuit;
  • the air conditioner outdoor unit control circuit further includes:
  • the main controller of the outdoor unit the control signal input end of which is connected to the main controller of the indoor unit in communication, and the output end of the main controller of the outdoor unit is connected to the controlled end of the second electronic switch; the main controller of the outdoor unit is connected to the controlled end of the second electronic switch; , which is used to control the second electronic switch to close when receiving a power-on control signal.
  • the external power supply circuit includes a rectifier bridge circuit, a PFC circuit and an IPM module sequentially connected to the power input end, and the controlled ends of the PFC circuit and the IPM module are respectively connected to the main controller. connect.
  • the air conditioner outdoor unit control circuit has a first application mode and a second application mode
  • the first electronic switch is electrically connected to the current limiting element
  • the air conditioner outdoor unit control circuit further includes:
  • a short circuit device is electrically connected with the current limiting element.
  • the present application also proposes an electric control assembly, including an indoor electric control board, an outdoor electric control board, an electrical connector, and the above-mentioned control circuit for an outdoor unit of an air conditioner;
  • the air conditioner outdoor unit control circuit and the electrical connector are arranged on the outdoor unit control board;
  • the electrical connector is used to connect the indoor electric control board and the outdoor electric control board.
  • the indoor electric control board is provided with:
  • the indoor unit main controller is connected in communication with the main controller of the air conditioner outdoor unit control circuit;
  • the main controller of the indoor unit is used to communicate with the main controller of the outdoor unit of the control circuit of the outdoor unit of the air conditioner when receiving the power-on control signal, so as to control the second electronic switch of the control circuit of the outdoor unit of the air conditioner to close and, when receiving the wake-up control signal, output standby control power to the standby power supply of the air conditioner external unit control circuit to control the closing of the first electronic switch of the air conditioner external unit control circuit.
  • the present application also proposes an air conditioner, which includes the above-mentioned control circuit of the outdoor unit of the air conditioner; or, includes the above-mentioned electric control assembly.
  • the control circuit of the outdoor unit of the air conditioner of the present application is provided with a standby power supply, the input terminal of which is connected to the output terminal of the standby control power supply of the indoor unit, and the output terminal is connected to the controlled terminal of the first electronic switch, and the standby power supply is used for Start work when receiving the standby control power of the indoor unit to control the first electronic switch connected in series between the power input terminal and the power supply circuit of the outdoor unit to be closed, so that when the first electronic switch is closed,
  • the power input end and the power supply circuit of the external unit can be connected, so that the power supply circuit of the external unit converts the connected AC power into the power supply of the external unit to supply power for the outdoor unit.
  • the standby power supply works and provides driving power for the first electronic switch.
  • the standby power supply stops working, and the first electronic switch Because the standby power supply stops supplying power and is disconnected, the outdoor unit is powered off and stops working. Since the power supply between the outdoor unit and the indoor unit is disconnected, the outdoor unit will not be charged at this time, so that 0W standby can be realized when the outdoor unit is in standby.
  • the present application is beneficial to reduce the power consumed by the air conditioner due to standby, and meet the requirement of low energy consumption.
  • FIG. 1 is a schematic diagram of functional modules of an embodiment of an air conditioner outdoor unit control circuit of the present application
  • FIG. 2 is a schematic diagram of the circuit structure of an embodiment of the control circuit of the outdoor unit of the air conditioner of the present application;
  • FIG. 3 is a schematic diagram of a circuit structure of an embodiment of the standby power supply shown in FIG. 1 .
  • the present application proposes a control circuit for an outdoor unit of an air conditioner, which is applied to an outdoor unit of an air conditioner.
  • Both the outdoor unit and the indoor unit of the air conditioner are provided with electric control boards, that is, the outdoor electric control board and the indoor electric control board, and the indoor electric control board is provided with the power plug, the power plug and the indoor electric control board.
  • Control board connection used to connect to AC power, such as commercial power.
  • the indoor electrical control board is used to control the indoor unit of the air conditioner
  • the outdoor electrical control board is used to control the outdoor unit of the air conditioner.
  • the outdoor electric control board can be connected to the power supply from the indoor electric control board through the power cord, that is, the indoor unit is usually powered to the outdoor unit, and the air conditioner is in the standby state for most of the time, and the standby power consumption is Also higher.
  • the indoor unit is usually used to cut off the power of the outdoor unit, so that the outdoor unit is completely powered off, thereby reducing the standby power consumption of the outdoor unit.
  • an outdoor unit main controller and a relay for controlling the power supply of the outdoor unit are usually provided on the outdoor unit control board.
  • the communication connection between the main controller of the outdoor unit and the main controller of the indoor unit, the main controller of the outdoor unit determines whether to connect to the power supply of the indoor unit according to the control signal output by the main controller of the indoor unit.
  • the main controller of the unit controls the relay to turn off to cut off the power of the outdoor unit to reduce the standby power consumption of the air conditioner. To reduce the standby power consumption of the air conditioner.
  • the air conditioner can also be powered by the outdoor unit, and the loads in the indoor unit (such as indoor fans, stepper motors, etc.) are powered by the outdoor unit.
  • the main controller of the indoor unit is set on the electronic control board of the indoor unit.
  • the main controller of the indoor unit is the main control part of the whole air conditioner.
  • the loads of the indoor unit and the outdoor unit are controlled by the main controller of the indoor unit.
  • the control signal of the load is directly sent by the main controller of the indoor unit, while the control signal of the load of the outdoor unit (such as outdoor electric control board, compressor, four-way valve, outdoor fan) is sent by the main controller of the indoor unit through the current loop communication circuit
  • the outdoor unit main controller controls the operation of the outdoor unit load according to the control signal.
  • the present application proposes a novel air conditioner outdoor unit control circuit.
  • the air conditioner outdoor unit control circuit includes:
  • the power input terminals L and N are used to connect to the AC power supply;
  • the external unit power supply circuit 10 is connected to the power input terminals L and N, and is used for converting the connected AC power into the external unit power supply;
  • the first electronic switch 20 is arranged in series between the power input terminals L and N and the external power supply circuit 10; and,
  • the standby power supply 30 whose input end is connected to the output end of the standby control power supply of the indoor unit, and whose output end is connected to the controlled end of the first electronic switch 20, the standby power supply 30 is used for receiving the output of the indoor unit When the control power is in standby, the work is started to control the first electronic switch 20 to be closed.
  • the power input terminals L and N can be connected to the AC power supply from the indoor unit, that is, to supply power to the outdoor unit through the indoor unit, or connected to the AC power supply from the outside, and the AC power output terminal can also be set to supply power to the indoor unit.
  • the unit provides AC power, that is, power is supplied to the indoor unit through the outdoor unit.
  • the power supply of the outdoor unit can be optionally provided by the indoor unit.
  • the external power supply circuit 10 can be realized by components such as isolation transformers, switch tubes, PWM controllers, rectifier filter circuits, etc., so as to connect the AC power supply, such as 220V mains, to the power input terminals L and N for power processing, such as Rectification, filtering, inversion, etc., are converted into corresponding power supply voltages to supply power to compressors, fans, solenoid valves, four-way valves, etc. in the outdoor unit.
  • components such as isolation transformers, switch tubes, PWM controllers, rectifier filter circuits, etc., so as to connect the AC power supply, such as 220V mains, to the power input terminals L and N for power processing, such as Rectification, filtering, inversion, etc., are converted into corresponding power supply voltages to supply power to compressors, fans, solenoid valves, four-way valves, etc. in the outdoor unit.
  • the power input terminals L and N include a neutral power supply terminal N and a live wire power supply terminal L.
  • the external power supply circuit 10 further includes a filter circuit, and the filter circuit is arranged in parallel with the neutral power supply. between the terminal N and the live wire power terminal L.
  • the filter circuit includes capacitors C1, C2, C3 and inductors L1 and L2.
  • the first end of the inductor L1 is connected to the live wire power supply terminal L
  • the second end of the inductor L1 is connected to the inductor L2
  • the capacitor C1 is connected to zero.
  • the capacitor C2 is arranged in parallel with the second terminal of the inductor L1.
  • the second end of the inductor L2 is connected to the first input end of the external power supply circuit 10
  • the capacitor C2 is arranged in parallel between the second end of the inductor L2 and the neutral power supply end N.
  • Capacitors C1 and C2 can choose to accommodate larger electrolytic capacitors to absorb low-order harmonics and maintain voltage
  • capacitor C3 can choose to accommodate smaller film capacitors to absorb higher-order harmonics.
  • the power input terminals L and N can be connected to the standby control power supply of the indoor unit through the power cord.
  • the standby control power supply of the indoor unit can be the AC power connected to the indoor unit.
  • the A relay is set on the indoor electric control board, and the relay is connected between the output terminal of the AC power supply and the standby power supply 30.
  • the main controller of the indoor unit can control the relay to disconnect, so that the standby power supply 30 can be switched off.
  • the main controller of the indoor unit controls the relay to pull in, so that the standby power supply 30 is connected to the power supply.
  • the standby power supply 30 converts the AC connected to the indoor unit into the driving power of the first electronic switch 20, thereby driving the first electronic switch 20 to work, so as to realize the on/off of the first electronic switch 20, and then control the output of the indoor unit to the outside
  • the AC power supply of the unit power supply circuit 10 is turned on/off, so that in the standby state of the outdoor unit, the whole outdoor unit is not powered, and the standby with zero power consumption can be realized.
  • the first electronic switch 20 in this embodiment is controlled by the standby power supply 30.
  • the standby power supply 30 works under the wake-up of the main controller of the indoor unit, and does not work (uncharged) when the outdoor unit is in normal operation or stopped, so that the first electronic switch 20 is not powered on.
  • the electronic switch 20 is in an off state, and this setting can meet the low power consumption requirement of the air conditioner, and at the same time reduce the power consumption of the low power consumption power supply itself, thereby further realizing energy saving and emission reduction.
  • the standby power supply 30 may be implemented by a switching power supply.
  • the standby power supply 30 may only provide driving power for the first electronic switch 20 to control the outdoor unit to switch from the standby state to the working state, and the standby power supply 30 may also be other circuit modules on the control board of the outdoor unit , for example, the main controller of the outdoor unit provides power to supply power to the outdoor unit when it is switched from the standby state to the working state.
  • the control circuit of the outdoor unit of the air conditioner of the present application is provided with a standby power supply 30, the input terminal of which is connected to the output terminal of the standby control power supply of the indoor unit, and the output terminal is connected to the controlled terminal of the first electronic switch 20.
  • the standby power supply 30 is used to start work when receiving the standby control power supply of the indoor unit, to control the first electronic switch 20 connected in series between the power input terminals L, N and the power supply circuit 10 of the external unit to close, so as to When the first electronic switch 20 is closed, the power input terminals L and N and the external unit power supply circuit 10 can be connected, so that the external unit power supply circuit 10 converts the connected AC power into the external unit power supply to supply power to the outdoor unit.
  • the standby power supply 30 works and provides driving power for the first electronic switch 20.
  • the standby power supply 30 stops working.
  • An electronic switch 20 is disconnected because the standby power supply 30 stops supplying power, so that the outdoor unit is powered off and stops working. Since the power supply between the outdoor unit and the indoor unit is disconnected, the outdoor unit will not be charged at this time, so that 0W standby can be realized when the outdoor unit is in standby.
  • the present application is beneficial to reduce the standby power consumption of the air conditioner and meet the requirement of low energy consumption.
  • the first electronic switch 20 is a first relay RY1, and the first end of the coil of the first relay RY1 is connected to the ground end of the standby power supply 30;
  • the second end of the coil of the first relay RY1 is the controlled end of the first electronic switch 20, the static contact of the first relay RY1 is connected to the power input terminals L and N, and the first relay RY1
  • the movable contact is connected to the input end of the external power supply circuit 10 .
  • the first electronic switch 20 can be implemented by a relay, a contactor or a circuit breaker, and this embodiment can be implemented by a relay.
  • one end of the coil of the first relay RY1 is shared with the standby power supply 30 One end is connected to the output terminal of the standby power supply 30.
  • the standby power supply 30 converts the connected power supply into the driving power of the first relay RY1 and supplies the power to the first relay RY1.
  • a relay RY1 coil supplies power, so that the first relay RY1 is pulled in.
  • the power input terminals L and N When the first relay RY1 is pulled in, the power input terminals L and N output the AC power input by the indoor unit to the external unit power supply circuit 10, and the external unit power supply circuit 10 is connected to Convert the AC power connected to the power input terminals L and N, such as 220V mains, for power processing, such as rectification, filtering, inversion, etc., into the corresponding power supply voltage to supply the compressor, fan, electromagnetic Valves, four-way valves, etc.
  • the external unit power supply circuit 10 can also supply power to the main controller of the outdoor unit, and the external unit power supply circuit 10 can be provided with a switching power supply for supplying power to the main controller of the outdoor unit.
  • the first relay RY1 When the first relay RY1 is closed, the power input terminals L and N output AC power.
  • the switching power supply from the power supply to the external unit power supply circuit 10 converts the connected AC power into the power supply of the main controller of the outdoor unit, so that the main controller of the outdoor unit is powered to work.
  • the main controller of the outdoor unit can use an isolated switching power supply to supply power, and specifically can be implemented by using components such as an isolation transformer, a switch tube, a PWM controller, a rectifier filter circuit, etc., so as to connect the power input terminals L and N to the power supply.
  • the AC power supply such as 220V mains, is converted into DC power and then output to the outdoor unit controller to provide working voltage for the outdoor unit controller.
  • the working voltage value of the outdoor unit controller may be 10-18V, and may be selected as 12V in this embodiment.
  • the first electronic switch 20 can be further realized by using the magnetically latched first relay RY1.
  • the indoor unit provides power to the standby power supply 30, so that the first relay RY1 is energized and pulled in, the magnetically latched first relay RY1 is turned on.
  • the magnetic force of the permanent magnet in RY1 keeps the moving and static contacts of the first magnetic-retaining relay RY1 in a closed state, and there is no need to continue charging the coil assembly.
  • the main controllers communicate with each other, so that the main controller of the indoor unit controls the first relay RY1 in the indoor unit to be disconnected.
  • the main controller of the indoor unit may set a timer to disconnect the power supply of the standby power supply 30 after supplying power to the standby power supply 30 for a preset time. Thereafter, the magnetic latching first relay RY1 does not need to consume power, thereby reducing the operating power consumption of the air conditioner.
  • the main controller of the outdoor unit communicates with the main controller of the indoor unit, so that the main controller of the indoor unit controls the first relay RY1 in the indoor unit to be disconnected. In order to cut off the power supply of the outdoor unit, stop the power supply to the outdoor unit, and control the outdoor unit to stop working, so that the standby power consumption of the air conditioner can be reduced when the air conditioner is in standby.
  • the standby power supply 30 is a non-isolated switching power supply
  • the input terminal of the non-isolated switching power supply is the input terminal of the standby power supply 30
  • the non-isolated switching power supply The output end of the power supply is the output end of the power supply
  • the non-isolated switching power supply is specifically used to convert the standby control power supply of the indoor unit into a DC voltage, so that the first relay RY1 is powered and pulled in.
  • the non-isolated switching power supply can be implemented by using components such as EMI filter capacitors, filter inductors, rectifier bridge B1, step-down chips, output inductors, and output capacitors, so as to convert the connected AC power, such as 220V mains power, into After rectification, filtering and step-down processing, it is converted into a power supply for the first electronic switch 20 and other circuit modules.
  • the power supply 130 can be optionally 12V or 24V.
  • the standby power supply 30 includes a rectifier circuit (eg, a rectifier bridge B1, a DC-DC circuit), a switching power supply IC1, a power supply filter circuit, a feedback circuit, etc., wherein the input end of the rectifier bridge B1 is connected to the input terminal of the indoor unit.
  • the output terminal of the standby control power supply is connected, the output terminal of the rectifier bridge B1 is connected to the switching power supply IC1, and the output terminal of the switching power supply IC1 is connected to the controlled terminal of the first electronic switch 20 through the power filter circuit.
  • the detection end of the feedback circuit is connected with the output end of the power filter circuit, and the output end of the feedback circuit is connected with the switching power supply IC1.
  • the feedback circuit includes resistors R1, R2, R3 and a diode D1, wherein the diode D1 is arranged in series with the resistors R1, R2, and R3, and the common terminal of R2 and R3 is the output terminal of the feedback circuit.
  • the power filter circuit includes an inductor L3, a resistor R4 and a capacitor C4, wherein one end of the inductor is connected to the output end of the switching power supply IC1, and the capacitor and the resistor are arranged in parallel at the other end of the inductor L3.
  • the standby power supply 30 is also provided with an NTC resistor NTC1, a fuse tube FUSE1, and a Zener diode D2.
  • the fuse tube FUSE1 and the NTC resistor NTC1 are connected in series between the output end of the standby control power supply and the rectifier bridge B1, and the Zener diode D2 is arranged in series at Between inductor L3 and ground.
  • the non-isolated switching power supply can provide the corresponding power supply for the first electronic switch 20 (such as a relay).
  • a relay when a relay is used, it can be a 12V power supply to control the pull-in of the relay and realize the low-power standby of the air-conditioning system. .
  • the input terminal W of the standby power supply 30 can be electrically connected with the strong current output terminal of the indoor unit, that is, the input terminal W and the power input terminal L of the standby power supply 30 are connected to the same AC power supply, so as to connect the After the strong alternating current is converted into weak direct current, power is supplied to the first electronic switch 20 to drive the second electronic switch 20 to work.
  • other power supplies in the indoor unit can also be connected, such as 24V, 36V, etc. power output terminals, which are not limited here.
  • This embodiment uses a non-isolated switching power supply to supply power to the first electronic switch 20.
  • this embodiment can reduce the interference of the electromagnetic interference generated by the isolated power supply on the first electronic switch 20, which is beneficial to improve the Reliability of the control of the first electronic switch 20 .
  • the non-isolated switching power supply has low power consumption because it does not need to install a device with serious heat such as a transformer, and does not need to provide a heat sink for the switching power supply.
  • the air conditioner outdoor unit control circuit further includes:
  • the second electronic switch 40, the second electronic switch 40 is arranged in series between the power input terminals L, N and the input terminal of the external power supply circuit 10; and,
  • the current limiting element PTC1 is arranged in series between the first electronic switch 20 and the power input terminals L and N of the external power supply circuit 10 .
  • the air conditioner outdoor unit control circuit further includes:
  • the main controller of the outdoor unit the control signal input terminal of which is connected to the main controller of the indoor unit in communication, and the output terminal of the main controller of the outdoor unit is connected to the controlled terminal of the second electronic switch 40; the main controller of the outdoor unit The controller is used to control the second electronic switch 40 to close when receiving the power-on control signal.
  • the current-limiting element PTC1 may be implemented by using an element with current-limiting characteristics, such as an inductor and a resistor, and a resistor may be optionally used in this embodiment.
  • the external unit power supply circuit 10 converts the AC power connected through the AC input terminal and the current limiting element PTC1 into DC power and outputs it to the power terminal of the main controller of the outdoor unit, so as to be the main controller of the outdoor unit. Controller power supply.
  • the current limiting element PTC1 can suppress the current surge at the moment of power-on, so as to prevent the current surge from being too large and damaging the subsequent circuit such as the rectifier bridge B1, the PFC circuit or other power supplies.
  • a counter is also integrated in the main controller of the outdoor unit, and by adjusting the timing time of the counter, the main controller of the outdoor unit controls the second electronic switch 40 to close after the air conditioner is powered on for a certain period of time, such as 10s or 20s, so as to control the power supply
  • the input terminals L and N are connected to the AC power supply and supply power to other circuit modules of the outdoor unit.
  • the second electronic switch 40 may be implemented by a relay, a contactor or a circuit breaker.
  • a relay may be selected to be implemented.
  • the outdoor unit controller is implemented by a microcontroller such as a single-chip microcomputer, and the second electronic switch 40
  • the relay When the relay is used to implement (marked as the second relay RY2 in the figure), the operating voltage of the outdoor unit controller is generally 3.3V or 5V, and the driving voltage of the relay is generally 12V.
  • a relay driving circuit such as a triode circuit, may be provided, and the relay driving circuit may be arranged in series between the outdoor unit controller and the relay, so that the outdoor unit controller controls the relay driving circuit to drive the relay to act.
  • the controlled end of the second electronic switch 40 is one end of the coil of the second relay RY2 (marked as M1 in the figure).
  • one end of the coil M1 of the second relay RY2 is connected to the outdoor unit controller through the relay drive circuit (not shown)
  • the other end of the coil of the second relay RY2 is connected to the DC power supply VCC1
  • the second relay RY2 receives the outdoor unit.
  • the power supply circuit 10 of the outdoor unit can be controlled by the second electronic switch 40 ( main relay) to achieve power-on.
  • This embodiment adopts dual electronic switches (dual relays RY1 and RY2).
  • the second electronic switch 40 is used to supply power to the outdoor unit when it is working normally, and the second electronic switch 40 is used to supply power when the outdoor unit is woken up from standby.
  • This application solves the problem that during the standby process of the air conditioner, it is necessary to supply power to the main controller of the outdoor unit, which makes the power supply circuit (such as the switching power supply) of the main controller of the outdoor unit still in a live working state, resulting in the high standby power of the air conditioner. And can not meet the problem of low energy consumption requirements.
  • the present application can also solve the problem that the whole power supply of the air conditioner is provided by the outdoor unit. When the whole unit is in the standby state, the load in the outdoor unit is still in a live working state, resulting in the high standby power of the air conditioner, which cannot meet the requirements of low energy consumption. question.
  • the external power supply circuit 10 includes a rectifier bridge circuit B2, a PFC circuit (not shown) and an IPM module ( Not shown), the controlled ends of the PFC circuit and the IPM module are respectively connected to the main controller.
  • the external power supply circuit 10 further includes a rectifier bridge B2, which is used for converting the input alternating current into direct current and then outputting it.
  • the PFC circuit can use other components such as PFC switches, diodes, energy storage capacitors, and inductors to realize the power factor correction of the DC power supply.
  • multiple power switch tubes are integrated in the IPM module, and multiple power switch tubes form a drive inverter bridge circuit.
  • the tubes form a two-phase inverter bridge circuit.
  • each power switch tube can be realized by MOS tube or IGBT.
  • Multiple power switch tubes form a power inverter bridge circuit, and the PFC circuit and the IPM module are respectively connected to the outdoor unit controller, so that when the PFC circuit receives the control signal output by the outdoor unit controller, the input power is corrected for the power factor.
  • output to the IPM module when the IPM module receives the logic control signal output by the outdoor unit controller, it drives the compressor to work and realizes the frequency conversion control of the compressor.
  • the air conditioner outdoor unit control circuit has a first application mode and a second application mode
  • the first electronic switch 20 is electrically connected to the current limiting element PTC1;
  • the air conditioner outdoor unit control circuit further includes:
  • the short-circuiting devices J1 and J2 are electrically connected to the current limiting element PTC1 .
  • two 0-ohm resistors J1 and J2 are added in parallel on the two contacts of the relay and then connected in series with the current limiting element PTC1.
  • the low-power standby function of the outdoor unit is implemented as complete hardware control, and the standby and normal operation are completed by the dual relay control of relays RY2 and RY1, which can realize low-power standby.
  • the AC power is input through the high-power terminals L and N inserts to supply power to the external unit system of the air conditioner; in the application with low-power standby demand, that is, in the first application mode, the L, N , W 3 strong power inserts supply power to the system.
  • the two welding points of the static contact and the moving contact can be set on the electric control board by short-circuiting devices J1 and J2 such as 0 ohm resistors.
  • the short circuit is realized, and the current limiting element PTC1 is electrically connected to the power input terminal L through the short circuit devices J1 and J2.
  • the standby power supply 30 does not output 12V, so the first relay RY1 of the outdoor unit does not pull in, the power supply circuit of the outdoor unit is not powered, and the outdoor unit is in a standby state of 0 power consumption; when normal operation is required, the indoor unit controls the execution relay to pull
  • the input terminal of the standby power supply 30 is powered on, and the output is stabilized at 12V through the bridge stack rectification and switching power supply control in the standby power supply 30, and then the standby power supply 30 is controlled to execute the first relay RY1 to get power and pull in, So that the power supply circuit 40 of the outdoor unit is powered, so as to drive the outdoor unit to run normally.
  • the input terminals of the independent standby power supply 30 are W and N.
  • the W terminal is controlled by the internal machine to obtain power, and is rectified into DC through the fuse and NTC through the bridge stack, and then the above-mentioned non-isolated switching power supply outputs a stable DC 12V.
  • the standby power supply 30 provides a 12V power supply DJ12 and an independent DJ-GND for the execution relay RY1.
  • the low-power standby execution structure is the first relay RY1, which is placed at the rear end of the fuse FUSE1 of the main strong power input part of the external machine, and is located in front of the bridge stack, connected in series with the current limiting element PTC1, and then connected with the second relay RY2, that is, the first relay.
  • the two electronic switches 40 are connected in parallel.
  • the power supply ports of the main power input circuit of the outdoor unit are L and N
  • the input ports of the standby power supply 30 are W and N
  • the first relay RY1 of the execution structure is used.
  • the power supply 30 is connected to the power supply, and the first relay RY1 is energized and closed, so that the external unit power supply circuit 40 is energized, thereby driving the outdoor unit to operate normally.
  • the present application also proposes an electric control assembly, including an indoor electric control board, an outdoor electric control board, an electrical connector, and the above-mentioned control circuit for an outdoor unit of an air conditioner;
  • the air conditioner outdoor unit control circuit and the electrical connector are arranged on the outdoor unit control board;
  • the electrical connector is used to connect the indoor electric control board and the outdoor electric control board.
  • the electrical connector may be a power terminal, and the detachable electrical connection between the indoor electrical control board and the outdoor electrical control board is realized through the power terminal and the power cord, and all components of the control circuit of the outdoor unit of the air conditioner are arranged on the outdoor unit.
  • the electronic control board without relying on the AC contactor, all the low-power standby functions can be arranged on the control PCB board, and the on-off of the first electronic switch 20 is controlled by the standby power supply 30, so as to achieve zero power consumption standby and wake up.
  • the power supply port of the main high-power input circuit of the outdoor unit is LN, and there is no need to set the first relay RY1 and the standby power supply 30.
  • the AC contact is used.
  • the AC contactor needs to be assembled separately, which leads to complicated assembly and large external radiation, which increases the difficulty of electromagnetic compatibility.
  • the power supply 30 is set on the outdoor machine control board.
  • the standby power supply 30 is independent from the ground DJ-GND of the execution relay RY1, and has no common ground with the ground PGND of the main circuit of the outdoor machine, which can effectively reduce the relay generated. Electromagnetic interference affects other circuits on the electric control board, which is beneficial to improve the reliability of the outdoor unit.
  • the indoor electrical control board is provided with:
  • the main controller of the indoor unit (not shown in the figure), the main controller of the indoor unit is connected in communication with the main controller of the control circuit of the outdoor unit of the air conditioner; the main controller of the indoor unit is used for receiving the power-on control signal communicate with the outdoor unit main controller of the air conditioner external unit control circuit to control the second electronic switch 40 of the air conditioner external unit control circuit to close; and,
  • the indoor unit controller and the outdoor unit controller can be microprocessors such as single-chip microcomputer, DSP, and FPGA. Those skilled in the art can integrate some hardware circuits and software programs or algorithms in the indoor unit controller and the outdoor unit controller. To realize the communication between the two, the indoor unit controller and the outdoor unit controller may further integrate a software algorithm program for analyzing and comparing the received control command numbers, as well as a decoder and other algorithm programs for analyzing the control command. By running or executing the software programs and/or modules stored in the memory of the main controller, and calling the data stored in the memory, the received control instructions are compared and analyzed.
  • the outdoor unit controller when the outdoor unit controller receives a power-on command, the outdoor unit controller outputs a switch control signal to the second electronic switch 40 to trigger the second electronic switch 40 to close, thereby supplying power to the outdoor unit power supply circuit 10 .
  • the outdoor unit controller receives a shutdown command, the outdoor unit controller outputs a switch control signal to the second electronic switch 40 to trigger the second electronic switch 40 to be turned off, thereby stopping power supply to the outdoor unit power supply circuit 10 .
  • a current detection circuit and a voltage detection circuit are also provided on the indoor electrical control board, and signal detection circuits such as a temperature detection circuit are also provided at positions corresponding to each structural component of the air conditioner.
  • the indoor unit controller can also receive indoor signals, such as indoor temperature, heat exchanger temperature, compressor temperature, fan speed, compressor current, etc., and control the outdoor unit power supply circuit 10 to work through the outdoor unit controller according to the indoor signal. .
  • the outdoor unit power supply circuit 10 works according to the logic instructions output by the outdoor unit controller, and converts the connected AC power through the PFC circuit and the IPM module to drive components such as compressors, fans, and heat exchangers.
  • the power supply in the external unit power supply circuit 10 is converted into DC power through the AC input connected to the AC input terminal and then output to the power supply terminal of the outdoor unit controller to supply power to the outdoor unit controller.
  • the current limiting element PTC1 can suppress the current surge at the moment of power-on, so as to prevent the current surge from being too large and damaging the subsequent circuit such as the external machine power supply circuit 10 .
  • the outdoor unit controller is also integrated with a counter, and by adjusting the timing time of the counter, the outdoor unit controller controls the second electronic switch 40 to close after the air conditioner is powered on for a certain period of time, such as 10s or 20s, thereby controlling the power input terminal L and N are connected to the AC power supply and supply power to other circuit modules on the control board of the outdoor machine.
  • the outdoor unit controller and the indoor unit controller are connected in communication, and the indoor unit controller can receive external input control commands, such as remote control commands such as cooling, heating, dehumidification, temperature, and wind speed, and decode and analyze the received control commands. , converted into a corresponding control signal, and output to the external and internal unit controller, so that the outdoor unit controller can drive the external unit power supply circuit 10 and other circuit modules and loads on the outdoor unit control board to work according to the received control signal. So as to realize the cooling, heating, dehumidification and other functions of the air conditioner.
  • the external power supply circuit 10 converts the input electrical energy into a supply voltage and outputs it to components such as compressors, fans, and heat exchangers, so as to drive components such as compressors, fans, and heat exchangers to work.
  • the present application also proposes an air conditioner, which includes the above-mentioned control circuit for the outdoor unit of the air conditioner.
  • control circuit of the outdoor unit of the air conditioner For the detailed structure of the control circuit of the outdoor unit of the air conditioner, reference may be made to the above-mentioned embodiments, which will not be repeated here;
  • the examples include all the technical solutions of all the above-mentioned embodiments of the control circuit of the outdoor unit of the air conditioner, and the technical effects achieved are also the same, which will not be repeated here.

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Abstract

一种空调室外机控制电路、电控组件及空调器,该空调室外机控制电路包括:电源输入端,用于接入交流电源;外机供电电路(10),与电源输入端连接,用于将接入的交流电转换成外机供电电源;第一电子开关(20),串联设置于电源输入端与外机供电电路(10)之间;以及,待机供电电源(30),其输入端与室内机的待机控制电源输出端连接,其输出端与第一电子开关(20)的受控端连接,待机供电电源(30)用于在接收到室内机的待机控制电源时启动工作,以控制第一电子开关(20)闭合。

Description

空调室外机控制电路、电控组件及空调器
本申请要求于2020年12月31日申请的、申请号为202011644550.9的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电控技术领域,特别涉及一种空调室外机控制电路、电控组件及空调器。
背景技术
随着科技进步,人们对空调的要求也越来越高,不再关注是否能制冷、制热,人们也越来越关注空调是否节能减耗,也即节能是衡量家电性能的标准之一,空调作为大功率电器,是家庭能耗较大的家电设备,因此如何降低空调器的能耗,实现节能环保成为空调厂家研究以及用户关注的热点。然而在空调自身结构限制下,降低功耗也越来越难。
技术问题
本申请的主要目的是提出一种空调室外机控制电路、电控组件及空调器,旨在降低因待机消耗的功率,满足低能耗要求。
技术解决方案
为实现上述目的,本申请提出一种空调室外机控制电路,所述空调室外机控制电路包括:
电源输入端,用于接入交流电源;
外机供电电路,与所述电源输入端连接,用于将接入的交流电转换成外机供电电源;
第一电子开关,串联设置于所述电源输入端与所述外机供电电路之间;以及,
待机供电电源,其输入端与室内机的待机控制电源输出端连接,其输出端与所述第一电子开关的受控端连接,所述待机供电电源用于在接收到室内机的待机控制电源时启动工作,以控制所述第一电子开关闭合。
在一实施例中,所述第一电子开关为第一继电器,所述第一继电器线圈的第一端与所述待机供电电源的接地端连接;所述第一继电器线圈的第二端为所述第一电子开关的受控端,所述第一继电器的静触点与所述电源输入端连接,所述第一继电器的动触点与所述外机供电电路的输入端连接。
在一实施例中,所述待机供电电源为非隔离开关电源,所述非隔离开关电源的输入端为所述待机供电电源的输入端,所述非隔离开关电源的输出端为所述供电电源的输出端;
所述非隔离开关电源,用于将所述室内机的待机控制电源转换为直流电压,以使所述第一继电器得电吸合。
在一实施例中,所述空调室外机控制电路还包括:
第二电子开关,所述第二电子开关串联设置于电源输入端与所述外机供电电路的输入端之间;以及,
限流元件,所述限流元件串联设置于所述第一电子开关与所述外机供电电路的电源输入端之间。
在一实施例中,所述空调室外机控制电路还包括:
室外机主控制器,其控制信号输入端与室内机主控制器通讯连接,所述室外机主控制器的输出端与所述第二电子开关的受控端连接;所述室外机主控制器,用于在接收到开机控制信号时,控制所述第二电子开关闭合。
在一实施例中,所述外机供电电路包括依次与所述电源输入端连接的整流桥电路、PFC电路及IPM模块,所述PFC电路和IPM模块的受控端分别与所述主控制器连接。
在一实施例中,所述空调室外机控制电路具有第一应用模式及第二应用模式;
在所述第一应用模式下,所述第一电子开关与所述限流元件电连接;
在所述第二应用模式下,所述空调室外机控制电路还包括:
短接器件,所述短接器件与所述限流元件电连接。
本申请还提出一种电控组件,包括室内机电控板、室外机电控板、电连接器及如上所述的空调室外机控制电路;
所述空调外机控制电路及所述电连接器设置于所述室外机电控板上;
所述电连接器用于连接所述室内机电控板及室外机电控板。
在一实施例中,所述室内机电控板上设置有:
室内机主控制器,所述室内机主控制器与所述空调外机控制电路的主控制器通讯连接;
所述室内机主控制器,用于在接收到开机控制信号时,与所述空调外机控制电路的室外机主控制器进行通讯,以控制所述空调外机控制电路的第二电子开关闭合;以及,在接收到唤醒控制信号时,输出待机控制电源至所述空调外机控制电路的待机供电电源,以控制所述空调外机控制电路的第一电子开关闭合。
本申请还提出一种空调器,包括如上所述的空调室外机控制电路;或者,包括如上所述的电控组件。
有益效果
本申请空调室外机控制电路通过设置待机供电电源,其输入端与室内机的待机控制电源输出端连接,其输出端与所述第一电子开关的受控端连接,所述待机供电电源用于在接收到室内机的待机控制电源时启动工作,以控制所述串联设置于所述电源输入端与所述外机供电电路之间的第一电子开关闭合,以在第一电子开关闭合时,能够连通电源输入端及外机供电电路,从而使得外机供电电路将接入的交流电转换成外机供电电源为室外机供电。可以理解的是,在室内机输出有电源时,待机供电电源则工作,并为第一电子开关提供驱动电源,在室内机停止输出电源时,待机供电电源则停止工作,此时第一电子开关因为待机供电电源停止供电而断开,从而使室外机掉电而停止工作。由于室外机与室内机之间的电源断开,此时室外机上不会带电,从而可以在室外机待机时,实现0W待机。本申请有利于降低空调器因待机消耗的功率,满足低能耗要求。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图示出的结构获得其他的附图。
图1为本申请空调室外机控制电路一实施例的功能模块示意图;
图2为本申请空调室外机控制电路一实施例的电路结构示意图;
图3为图1中待机供电电源一实施例的电路结构示意图。
附图标号说明:
标号 名称 标号 名称
10 外机供电电路 40 第二电子开关
20 第一电子开关 PTC1 限流元件
30 待机供电电源 J1、J2 短接器件
本申请目的的实现、功能特点及优点将结合实施例,参照附图做进一步说明。
本发明的实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请的一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
本申请提出一种空调室外机控制电路,应用于空调室外机中,该空调器可以是挂机、柜机、中央空调器等具有室外机的空调器。
空调器的室外机和室内机中,均设置有电控板,也即室外机电控板和室内机电控板,并且在室内机电控板上设置于电源插头,电源插头与室内机电控板连接,用于接入交流电源,例如市电。室内机电控板用于控制空调器的室内机工作,室外机电控板用于控制空调器的室外机工作。需要说明的是,室外机电控板可以通过电源线从室内电控板接入电源,也即通常是由室内机供电给室外机,并且空调器有多半时间是处于待机状态的,待机功耗也比较高。如果对空调器进行低功耗待机设计,通常会采用室内机对室外机进行电源切断的方式,以使室外机完全掉电,从而可降低室外机的待机功耗。一般地,室外机电控板上通常设置有室外机主控制器及用于控制室外机供电的继电器。室外机主控制器与室内机主控制器之间通讯连接,室外机主控制器根据室内机主控制器输出的控制信号来确定是否接入室内机的电源,当空调处于长期待机状态时,室外机主控制器控制继电器关断,以切断室外机电源,来降低空调器的待机功耗,并在空调器开机或者结束待机时,室外机主控制器控制继电器吸合,将电源给室外机,以降低空调器的待机功耗。由此可知,若通过室外机主控制器来控制继电器的通断,在空调器待机的过程中,需要给室外机主控制器供电,这使得室外机主控制器的供电回路(例如开关电源)仍然是带电工作状态,因此会导致空调器因待机功率高,而无法满足低能耗要求。
空调器也可以由室外机供电,室内机中的负载(如室内风机、步进电机等) 都由室外机提供电源。室内机的电控板上设置有室内机主控制器,室内机主控制器为空调器整机的主控部分,室内机和室外机的负载都由室内机的主控制器进行控制,室内机负载的控制信号由室内机主控制器直接发出,而室外机负载(如室外电控板、压缩机、四通阀、室外风机)的控制信号则由室内机主控制器通过电流环通讯电路发送至室外机控制器,再由室外机主控制器根据此控制信号控制室外机负载的运行。由此可知,若空调器的整机电源由室外机提供,那么当整机处于待机状态时,室外机中的负载仍处于带电工作状态,因此会导致空调器因待机功率高,而无法满足低能耗要求。
参照图1至图3,为了解决上述问题,本申请提出一种新型的空调室外机控制电路,在本申请一实施例中,该空调室外机控制电路包括:
电源输入端L、N,用于接入交流电源;
外机供电电路10,与所述电源输入端L、N连接,用于将接入的交流电转换成外机供电电源;
第一电子开关20,串联设置于所述电源输入端L、N与所述外机供电电路10之间;以及,
待机供电电源30,其输入端与室内机的待机控制电源输出端连接,其输出端与所述第一电子开关20的受控端连接,所述待机供电电源30用于在接收到室内机的待机控制电源时启动工作,以控制所述第一电子开关20闭合。
本实施例中,电源输入端L、N可以从室内机接入交流电源,也即通过室内机给室外机供电,或者从外部接入交流电源,并且还可以设置交流电源输出端,以给室内机提供交流电源,也即通过室外机给室内机供电。本实施例可选为室外机的供电由室内机提供。
外机供电电路10可以采用隔离变压器、开关管、PWM控制器、整流滤波电路等元器件来实现,以将电源输入端L、N接入的交流电源,例如220V的市电进行电源处理,例如整流、滤波、逆变等,转换成对应的供电电压,以给室外机内的压缩机、风机、电磁阀、四通阀等供电。
上述实施例中,电源输入端L、N包括零线电源端N和火线电源端L,进一步地,所述外机供电电路10还包括滤波电路,所述滤波电路并联设置于所述零线电源端N和所述火线电源端L之间。
本实施例中,滤波电路包括电容C1、C2、C3和电感L1、L2,电感L1的第一端与火线电源端L连接,电感L1的第二端与电感L2连接,电容C1联设置于零线电源端N和所述火线电源端L之间,电容C2并连设置于电感L1的第二端。电感L2的第二端与外机供电电路10的第一输入端连接,电容C2并连设置于电感L2的第二端与零线电源端N之间。电容C1、C2可选用容置较大的电解电容,以吸收低次谐波和维持电压;电容C3可选用容置较小的薄膜电容,以吸收高次谐波。
电源输入端L、N可以通过电源线与室内机的待机控制电源连接,该室内机的待机控制电源具体可以是室内机接入的交流电源,在需要给室外机输出待机供电电源30时,在室内机电控板上设置继电器,继电器连接于交流电源输出端与待机供电电源30之间,在空调器切断电源,或者需要室外机待机的工况下,例如室内机和室外机均处于待机时,或者在室内机工作于扫风的工况时,此时室外机不工作,因此可以通过室内机主控制器控制继电器断开,从而使待机供电电源30切出电源。在需要室外机结束待机时,室内机主控制器控制继电器吸合,从而使待机供电电源30接入电源。待机供电电源30将室内机接入的交流转换成第一电子开关20的驱动电源,从而驱动第一电子开关20工作,以实现第一电子开关20的通/断,进而控制室内机输出至外机供电电路10的交流电源通/断,可以实现在室外机待机状态下,室外机整机不带电,可以实现0功耗待机。本实施例的第一电子开关20由待机供电电源30控制,待机供电电源30在室内机主控制器的唤醒下工作,在室外机正常工作或者停机时均不工作(不带电),使得第一电子开关20处于断开状态,如此设置,可以满足空调器的低功耗需求,同时降低低功耗供电电源自身的功耗,进一步的实现节能减排。其中,待机供电电源30可以采用开关电源来实现。本实施例中,待机供电电源30可以仅为第一电子开关20提供驱动电源,以控制室外机由待机状态转换为工作状态,待机供电电源30也可以为室外机电控板上的其他电路模块,例如室外机主控制器提供电源,以在室外机由待机状态转换为工作状态时,为其供电。
本申请空调室外机控制电路通过设置待机供电电源30,其输入端与室内机的待机控制电源输出端连接,其输出端与所述第一电子开关20的受控端连接,所述待机供电电源30用于在接收到室内机的待机控制电源时启动工作,以控制所述串联设置于所述电源输入端L、N与所述外机供电电路10之间的第一电子开关20闭合,以在第一电子开关20闭合时,能够连通电源输入端L、N及外机供电电路10,从而使得外机供电电路10将接入的交流电转换成外机供电电源为室外机供电。可以理解的是,在室内机输出有电源时,待机供电电源30则工作,并为第一电子开关20提供驱动电源,在室内机停止输出电源时,待机供电电源30则停止工作,此时第一电子开关20因为待机供电电源30停止供电而断开,从而使室外机掉电而停止工作。由于室外机与室内机之间的电源断开,此时室外机上不会带电,从而可以在室外机待机时,实现0W待机。本申请有利于降低空调器的待机功耗,满足低能耗要求。
参照图1至图3,在一实施例中,所述第一电子开关20为第一继电器RY1,所述第一继电器RY1线圈的第一端与所述待机供电电源30的接地端连接;所述第一继电器RY1线圈的第二端为所述第一电子开关20的受控端,所述第一继电器RY1的静触点与所述电源输入端L、N连接,所述第一继电器RY1的动触点与所述外机供电电路10的输入端连接。
本实施例中,第一电子开关20可以采用继电器、接触器或者断路器来实现,本实施例可选为继电器来实现,本实施例中,第一继电器RY1的线圈一端与待机供电电源30共地,一端与待机供电电源30的输出端连接,当待机供电电源30的输入端接入有电源时,待机供电电源30将从接入的电源转换成第一继电器RY1的驱动电源后,给第一继电器RY1线圈供电,从而使第一继电器RY1吸合,当第一继电器RY1吸合时,电源输入端L、N将室内机输入的交流电输出至外机供电电路10,外机供电电路10以将电源输入端L、N接入的交流电源,例如220V的市电进行电源处理,例如整流、滤波、逆变等,转换成对应的供电电压,以给室外机内的压缩机、风机、电磁阀、四通阀等供电。外机供电电路10还可以给室外机主控制器供电,外机供电电路10可以设置有给室外机主控制器供电的开关电源,在第一继电器RY1闭合时,电源输入端L、N输出交流电源至外机供电电路10的开关电源将接入的交流电转换成室外机主控制器的供电电源,从而使室外机主控制器得电工作。本实施例中,室外机主控制器可以采用隔离开关电源来供电,具体可以采用隔离变压器、开关管、PWM控制器、整流滤波电路等元器件来实现,以将电源输入端L、N接入的交流电源,例如220V的市电转换成直流电后输出至室外机控制器,以为室外机控制器提供工作电压。其中,室外机控制器的工作电压值可以是10~18V,本实施例可选为12V。
上述实施例中,第一电子开关20可以进一步采用磁保持第一继电器RY1来实现,在室内机给待机供电电源30提供电能,进而使第一继电器RY1得电吸合后,磁保持第一继电器RY1中永久磁铁的磁力使磁保持第一继电器RY1的动触点和静触点保持吸合状态,不需要再对线圈组件继续充电,也即,此时可以通过室外机主控制器与室内机主控制器之间进行通讯,从而使室内机主控制器控制室内机中的第一继电器RY1断开。或者,室内机主控制器可以设置定时器,在给待机供电电源30提供电源预设时间后断开待机供电电源30的供电。此后,磁保持第一继电器RY1不需要耗费电能,实现了降低空调器运行功耗,同时在空调器待机时通过磁保持第一继电器RY1控制室外机切断电源,降低了空调器的待机功耗。当接收到空调遥控器输出的关机或者待机的指令时,室外机主控制器与室内机主控制器之间进行通讯,从而使室内机主控制器控制室内机中的第一继电器RY1断开,以切断室外机电源,停止对室外机供电,控制室外机停止工作,从而使得空调器在待机时,能够降低空调器的待机功耗。
参照图1至图3,在一实施例中,所述待机供电电源30为非隔离开关电源,所述非隔离开关电源的输入端为所述待机供电电源30的输入端,所述非隔离开关电源的输出端为所述供电电源的输出端;
所述非隔离开关电源,具体用于将所述室内机的待机控制电源转换为直流电压,以使所述第一继电器RY1得电吸合。
本实施例中,非隔离开关电源可以采用EMI滤波电容、滤波电感、整流桥B1、降压芯片、输出电感及输出电容等元器件来实现,以将接入的交流电,例如220V的市电进行整流滤波及降压处理后,转换成第一电子开关20及其他电路模块的供电电源,本实施例中供电电源130可选为12V,或者24V。进一步地,上述实施例中,待机供电电源30包括整流电路(例如整流桥B1,DC-DC电路),开关电源IC1,电源滤波电路,反馈电路等,其中整流桥B1的输入端与室内机的待机控制电源输出端连接,整流桥B1的输出端与开关电源IC1连接,开关电源IC1的输出端与经电源滤波电路与第一电子开关20的受控端连接。反馈电路的检测端与电源滤波电路的输出端连接,反馈电路的输出端与开关电源IC1连接。其中,反馈电路包括电阻R1、R2、R3及二极管D1,其中二极管D1与电阻R1、R2、R3串联设置,R2、R3的公共端为反馈电路的输出端。电源滤波电路包括电感L3、电阻R4及电容C4,其中,电感一端与开关电源IC1的输出端连接,电容及电阻则并联设置于电感L3的另一端。在待机供电电源30中还设置有NTC电阻NTC1、保险管FUSE1、稳压二极管D2,保险管FUSE1、NTC电阻NTC1串联于待机控制电源输出端与整流桥B1之间,稳压二极管D2串联设置于电感L3与地之间。非隔离开关电源可以给第一电子开关20(例如继电器),提供相应的的供电电源,例如在采用继电器实现时,可以是12V供电电源的,以控制继电器吸合,实现空调系统低功耗待机。上述实施例中,待机供电电源30的输入端W可以与室内机的强电输出端电连接,也即待机供电电源30的输入端W与电源输入端L接入同一交流电源,以将接入的强电交流电转换成弱电直流电后,给第一电子开关20供电,驱动第二电子开关20工作。当然在其他实施例中,也可以接入室内机中的其他供电电源,例如24V,36V等的电源输出端,此处不做限制。本实施例采用非隔离开关电源来给第一电子开关20供电,相较于采用变压器等隔离电源,本实施例可以减少隔离电源自身产生的电磁干扰对第一电子开关20的干扰,有利于提高对第一电子开关20控制的可靠性。并且,非隔离开关电源因为不需要设置变压器等发热比较严重的器件,自身的功耗较低,且不需要为开关电源设置散热装置。
参照图1至图3,在一实施例中,所述空调室外机控制电路还包括:
第二电子开关40,所述第二电子开关40串联设置于电源输入端L、N与所述外机供电电路10的输入端之间;以及,
限流元件PTC1,所述限流元件PTC1串联设置于所述第一电子开关20与所述外机供电电路10的电源输入端L、N之间。
在一实施例中,所述空调室外机控制电路还包括:
室外机主控制器,其控制信号输入端与室内机主控制器通讯连接,所述室外机主控制器的输出端与所述第二电子开关40的受控端连接;所述室外机主控制器,用于在接收到开机控制信号时,控制所述第二电子开关40闭合。
其中,限流元件PTC1可以采用电感、电阻等具有限流特性的元件来实现,本实施例可选采用电阻。
本实施例中,在空调器上电时,外机供电电路10将经交流输入端及限流元件PTC1接入的交流电转换为直流电后输出至室外机主控制器的电源端,以为室外机主控制器供电。此时限流元件PTC1可以抑制上电瞬间的电流浪涌,以防止电流冲击过大,而损坏后级电路例如整流桥B1、PFC电路或者其他供电电源。室外机主控制器内还集成有计数器,并通过调节计数器的计时时间,从而在空调器上电一定时间,例如10s或者20s后,室外机主控制器控制第二电子开关40闭合,从而控制电源输入端L、N接入交流电源,并为室外机的其他电路模块供电。
第二电子开关40可以采用继电器、接触器或者断路器来实现,本实施例可选为继电器来实现,可以理解的是,在室外机控制器采用单片机等微控制器来实现,第二电子开关40采用继电器来实现时(图中标为第二继电器RY2),室外机控制器的工作电压一般为3.3V或者5V,而继电器的驱动电压一般为12V,为了驱动继电器工作,在主控板上还可以设置有继电器驱动电路,例如三极管电路,并将继电器驱动电路串联设置于室外机控制器与继电器之间,以使室外机控制器控制继电器驱动电路驱动继电器动作。本实施例中,在第二电子开关40采用继电器来实现时,也即第二继电器RY2来实现时,第二电子开关40的受控端即为第二继电器RY2线圈的一端(图中标为M1),第二继电器RY2的线圈一端M1经继电器驱动电路(图未示出)与室外机控制器连接,第二继电器RY2的线圈另一端接入直流电源VCC1,第二继电器RY2在接收到室外机控制器的控制信号时闭合/断开,以在第二继电器RY2闭合时,控制电源输入端L、N输出交流电源至外机供电电路10,或者在第二继电器RY2断开合时,停止给室外机供电。
可以理解的是,在空调室外机正常工作,例如制冷、制热、除霜、消毒、电净化等工况时,外机供电电路10可由原室外机电控板上的第二电子开关40(主继电器)实现接电。本实施例采用双电子开关(双继电器RY1、RY2),由第二电子开关40来实现室外机正常工作时的供电,由第二电子开关40实现室外机待机状态下被唤醒工作时的供电。本申请解决了在空调器待机的过程中,需要给室外机主控制器供电,这使得室外机主控制器的供电回路(例如开关电源)仍然是带电工作状态,导致空调器因待机功率高,而无法满足低能耗要求的问题。本申请还可以解决空调器的整机电源由室外机提供,当整机处于待机状态时,室外机中的负载仍处于带电工作状态,导致空调器因待机功率高,而无法满足低能耗要求的问题。
参照图1至图3,在一实施例中,所述外机供电电路10包括依次与所述电源输入端L、N连接的整流桥电路B2、PFC电路(图未示出)及IPM模块(图未示出),所述PFC电路和IPM模块的受控端分别与所述主控制器连接。
本实施例中,外机供电电路10还包括整流桥B2,用于将输入的交流电转换成直流电后输出。PFC电路可以采用PFC开关、二极管、储能电容、电感等其他元器件来实现对直流电源的功率因素校正。本实施例中,IPM模块中集成了多个功率开关管,多个功率开关管组成驱动逆变桥电路,例如可以由六个功率开关管组成三相逆变桥电路,或者由四个功率开关管组成两相逆变器桥电路。其中,各功率开关管可以采用MOS管或者IGBT来实现。多个功率开关管组成功率逆变桥电路,PFC电路及IPM模块分别与室外机控制器连接,以在PFC电路接收到室外机控制器输出的控制信号时,对输入的电源进行功率因素校正后,输出至IPM模块,IPM模块在接收到室外机控制器输出的逻辑控制信号时,以驱动压缩机工作,并实现对压缩机的变频控制。
参照图1至图3,在一实施例中,所述空调室外机控制电路具有第一应用模式及第二应用模式;
在所述第一应用模式下,所述第一电子开关20与所述限流元件PTC1电连接;
在所述第二应用模式下,所述空调室外机控制电路还包括:
短接器件J1、J2,所述短接器件J1、J2与所述限流元件PTC1电连接。
本实施例中,同步增加2个0欧电阻J1、J2并联在继电器的两个触点上再与限流元件PTC1串联。室外机低功耗待机功能实现为完全硬件控制,待机与正常运行由继电器RY2和RY1双继电器控制完成,可以实现低功耗待机。当无低功耗待机需求应用场合,通过强电端子L 、N插片输入交流电为空调外机系统供电;有低功耗待机需求应用场合,也即第一应用模式下,则由L、N、W 3个强电插片为系统供电。并且在无低功耗电机需求应用场合,也即第二应用模式下,可以通过0欧姆电阻等短接器件J1、J2来将电控板上设置静触点和动触点的两个焊接点实现短接,此时限流元件PTC1通过短接器件J1、J2与电源输入端L电连接。如此设置,可以根据实际应用需求实现对应的功能。有利于提高电控板的兼容性,可以广泛应用于不同的机型的电控中,可以降低电控板的开发成本和生产成本。有低功耗待机需要的场合:当需要待机时,内机不输出控制信号,内机执行继电器不吸合,室外机W端口不得电,待机供电电源30不输出稳定12V,继电器不吸合,外机不得电处于低功耗状态;内机扫风状态时,内机不输出控制信号,内机执行继电器不吸合,室外机W端口不得电,W、N端口不输入交流电到待机供电电源30,待机供电电源30不输出12V,进而室外机执行第一继电器RY1不吸合,室外机供电电路不得电,室外机处于0功耗待机状态;当需要正常运行时,室内机控制执行继电器吸合,W得电,待机供电电源30输入端得电,经过待机供电电源30中的桥堆整流和开关电源控制输出稳定直流12V,进而控制待机供电电源30执行第一继电器RY1得电吸合,以使外机供电电路40得电,从而驱动室外机正常运行。独立的待机供电电源30输入端为W、N,其中W端由内机控制得电,经过保险管、NTC通过桥堆整流成直流,再由上述非隔离开关电源输出稳定的直流12V。为保证输出稳定,还可以在继电器的线圈两端加入2个电阻假负载。待机供电电源30为执行继电器RY1提供12V电源DJ12和独立地DJ-GND。低功耗待机执行结构为第一继电器RY1,放置于外机主强电输入部分保险管FUSE1后端,且位于桥堆前面,与限流元件PTC1串联,再与第二继电器RY2,也即第二电子开关40并联。低功耗待机需求场合,室外机主强电输入电路供电端口是L、 N,待机供电电源30输入端口W、N,执行结构第一继电器RY1,当需要从待机状态唤醒室外机时,通过待机供电电源30接入电源,第一继电器RY1得电吸合,以使外机供电电路40得电,从而驱动室外机正常运行。
本申请还提出一种电控组件,包括室内机电控板、室外机电控板、电连接器及如上所述的空调室外机控制电路;
所述空调外机控制电路及所述电连接器设置于所述室外机电控板上;
所述电连接器用于连接所述室内机电控板及室外机电控板。
本实施例中,电连接器可以是电源端子,通过电源端子和电源线实现室内机电控板和室外机电控板的可拆卸电连接,空调室外机控制电路的全部零器件设置在室外机电控板上,可以在不依赖交流接触器的情况下,将低功耗待机功能全部布局在控制PCB板,通过待机供电电源30控制第一电子开关20的通断,从而实现0功耗待机和唤醒。
本申请在无低功耗待机需求场合下,室外机主强电输入电路供电端口是L N,无需设置第一继电器RY1和待机供电电源30,相较于空调室外机低功耗待机功能采用交流接触器开断实现待机,由于需要单独装配交流接触器,导致装配复杂,且对外辐射大,增加电磁兼容的难度,本申请采用继电器及待机供电电源30来实现低功耗待机,并且将继电器和待机供电电源30设置在室外机电控板上,待机供电电源30与执行继电器RY1的地DJ-GND是独立的,与室外机主电路的地PGND两者不共地,可以有效的减少继电器产生的电磁干扰影响电控板上的其他电路,有利于提高室外机的可靠性。
参照图1至图3,在一实施例中,所述室内机电控板上设置有:
室内机主控制器(图未示出),所述室内机主控制器与所述空调外机控制电路的主控制器通讯连接;所述室内机主控制器,用于在接收到开机控制信号时,与所述空调外机控制电路的室外机主控制器进行通讯,以控制所述空调外机控制电路的第二电子开关40闭合;以及,
在接收到唤醒控制信号时,输出待机控制电源至所述空调外机控制电路的待机供电电源30,以控制所述空调外机控制电路的第一电子开关20闭合。
室内机控制器和室外机控制器可以是单片机、DSP及FPGA等微处理器,本领域的技术人员能够通过在室内机控制器和室外机控制器中集成一些硬件电路和软件程序或算法,来实现两者之间的通讯,室内机控制器和室外机控制器中可以还集成有用于分析比较接收到的控制指令号的软件算法程序,以及用于解析控制指令的解码器及其他算法程序。通过运行或执行存储在主控制器存储器内的软件程序和/或模块,并调用存储在存储器内的数据,对接收到的控制指令进行比较、分析等处理。例如在室外机控制器接收到开机指令时,室外机控制器输出开关控制信号至第二电子开关40,以触发第二电子开关40闭合,从而给外机供电电路10供电。或者在室外机控制器接收到关机指令时,室外机控制器输出开关控制信号至第二电子开关40,以触发第二电子开关40关断,从而停止给外机供电电路10供电。
可以理解的是,室内机电控板上还设置有电流检测电路、电压检测电路,以及在空调器的各结构部件对应的位置还设置有温度检测电路等信号检测电路。室内机控制器还可以接收室内信号,例如室内温度、换热器的温度、压缩机的温度、风机转速,压缩机电流等,并根据室内信号,通过室外机控制器控制外机供电电路10工作。
外机供电电路10根据室外机控制器输出的逻辑指令工作,并将接入的交流电源经过PFC电路及IPM模块进行电源转换,以驱动压缩机、风机、换热器等部件工作。
在空调器上电时,外机供电电路10内的供电电源经交流输入端接入的交流电转换为直流电后输出至室外机控制器的电源端,以为室外机控制器供电。此时限流元件PTC1可以抑制上电瞬间的电流浪涌,以防止电流冲击过大,而损坏后级电路例如外机供电电路10。室外机控制器内还集成有计数器,并通过调节计数器的计时时间,从而在空调器上电一定时间,例如10s或者20s后,室外机控制器控制第二电子开关40闭合,从而控制电源输入端L、N接入交流电源,并为室外机电控板上的其他电路模块供电。
室外机控制器和室内机控制器通讯连接,并且室内机控制器可以接收外部输入的控制指令,例如制冷、制热、除湿、温度、风速等遥控指令,并对接收的控制指令进行解码、分析,转换成对应的控制信号后,输出至外内机控制器,以使室外机控制器根据接收到的控制信号驱动外机供电电路10及室外机电控板上的其他电路模块及负载工作,从而实现空调器的制冷、制热、除湿等功能。外机供电电路10将输入的电能转换成供电电压后输出至压缩机、风机、换热器等部件,以驱动压缩机、风机、换热器等部件工作。
本申请还提出一种空调器,所述空调器包括如上所述的空调室外机控制电路。该空调室外机控制电路的详细结构可参照上述实施例,此处不再赘述;可以理解的是,由于在本申请空调器中使用了上述空调室外机控制电路,因此,本申请空调器的实施例包括上述空调室外机控制电路全部实施例的全部技术方案,且所达到的技术效果也完全相同,在此不再赘述。
以上所述仅为本申请的优选实施例,并非因此限制本申请的专利范围,凡是在本申请的发明构思下,利用本申请说明书及附图内容所作的等效结构变换,或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (10)

  1. 一种空调室外机控制电路,其中,所述空调室外机控制电路包括:
    电源输入端,用于接入交流电源;
    外机供电电路,与所述电源输入端连接,用于将接入的交流电转换成外机供电电源;
    第一电子开关,串联设置于所述电源输入端与所述外机供电电路之间;以及,
    待机供电电源,其输入端与室内机的待机控制电源输出端连接,其输出端与所述第一电子开关的受控端连接,所述待机供电电源用于在接收到室内机的待机控制电源时启动工作,以控制所述第一电子开关闭合。
  2. 如权利要求1所述的空调室外机控制电路,其中,所述第一电子开关为第一继电器,所述第一继电器线圈的第一端与所述待机供电电源的接地端连接;所述第一继电器线圈的第二端为所述第一电子开关的受控端,所述第一继电器的静触点与所述电源输入端连接,所述第一继电器的动触点与所述外机供电电路的输入端连接。
  3. 如权利要求2所述的空调室外机控制电路,其中,所述待机供电电源为非隔离开关电源,所述非隔离开关电源的输入端为所述待机供电电源的输入端,所述非隔离开关电源的输出端为所述供电电源的输出端;
    所述非隔离开关电源,用于将所述室内机的待机控制电源转换为直流电压,以使所述第一继电器得电吸合。
  4. 如权利要求1所述的空调室外机控制电路,其中,所述空调室外机控制电路还包括:
    第二电子开关,所述第二电子开关串联设置于电源输入端与所述外机供电电路的输入端之间;以及,
    限流元件,所述限流元件串联设置于所述第一电子开关与所述外机供电电路的电源输入端之间。
  5. 如权利要求4所述的空调室外机控制电路,其中,所述空调室外机控制电路还包括:
    室外机主控制器,其控制信号输入端与室内机主控制器通讯连接,所述室外机主控制器的输出端与所述第二电子开关的受控端连接;所述室外机主控制器,用于在接收到开机控制信号时,控制所述第二电子开关闭合。
  6. 如权利要求5所述的空调室外机控制电路,其中,所述外机供电电路包括依次与所述电源输入端连接的整流桥电路、PFC电路及IPM模块,所述PFC电路和IPM模块的受控端分别与所述主控制器连接。
  7. 如权利要求4所述的空调室外机控制电路,其中,所述空调室外机控制电路具有第一应用模式及第二应用模式;
    在所述第一应用模式下,所述第一电子开关与所述限流元件电连接;
    在所述第二应用模式下,所述空调室外机控制电路还包括:
    短接器件,所述短接器件与所述限流元件电连接。
  8. 一种电控组件,其中,包括室内机电控板、室外机电控板、电连接器及如权利要求1至7任意一项所述的空调室外机控制电路;
    所述空调外机控制电路及所述电连接器设置于所述室外机电控板上;
    所述电连接器用于连接所述室内机电控板及所述室外机电控板。
  9. 如权利要求8所述的电控组件,其中,所述室内机电控板上设置有:
    室内机主控制器,所述室内机主控制器与所述空调外机控制电路的主控制器通讯连接;
    所述室内机主控制器,用于在接收到开机控制信号时,与所述空调外机控制电路的室外机主控制器进行通讯,以控制所述空调外机控制电路的第二电子开关闭合;以及,在接收到唤醒控制信号时,输出待机控制电源至所述空调外机控制电路的待机供电电源,以控制所述空调外机控制电路的第一电子开关闭合。
  10. 一种空调器,其中,包括如权利要求1至7任意一项所述的空调室外机控制电路;或者,包括如权利要求8或9所述的电控组件。
PCT/CN2021/102398 2020-12-31 2021-06-25 空调室外机控制电路、电控组件及空调器 WO2022142201A1 (zh)

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