WO2020147234A1 - 供电控制电路和变频空调器 - Google Patents

供电控制电路和变频空调器 Download PDF

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Publication number
WO2020147234A1
WO2020147234A1 PCT/CN2019/088306 CN2019088306W WO2020147234A1 WO 2020147234 A1 WO2020147234 A1 WO 2020147234A1 CN 2019088306 W CN2019088306 W CN 2019088306W WO 2020147234 A1 WO2020147234 A1 WO 2020147234A1
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WIPO (PCT)
Prior art keywords
relay
power supply
outdoor unit
control module
control circuit
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PCT/CN2019/088306
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English (en)
French (fr)
Inventor
霍兆镜
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美的集团武汉制冷设备有限公司
美的集团股份有限公司
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Application filed by 美的集团武汉制冷设备有限公司, 美的集团股份有限公司 filed Critical 美的集团武汉制冷设备有限公司
Publication of WO2020147234A1 publication Critical patent/WO2020147234A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks

Definitions

  • This application relates to the technical field of air conditioners, and specifically to a power supply control circuit and an inverter air conditioner.
  • two high-current relays are required to control the power supply of the outdoor unit in the inverter air conditioner.
  • one is set on the indoor circuit board and the other is set on the outdoor circuit board.
  • the relay in the indoor unit it is necessary to turn on the relay in the indoor unit to get power to the outdoor unit.
  • the outdoor unit has a large filter capacitor, the thermistor must be connected in series to the main circuit to charge the large capacitor first, and then Use an outdoor high-current relay to short-circuit the thermistor.
  • the control circuit currently has the following defects:
  • the high-current relay has a higher cost and requires a larger control current, so it consumes a lot of energy;
  • the large current relay has a larger volume, so it takes up more space on the circuit board.
  • This application aims to solve at least one of the technical problems existing in the prior art or related technologies.
  • an object of the present application is to provide a power supply control circuit.
  • Another object of this application is to provide an inverter air conditioner.
  • a power supply control circuit is provided, which is suitable for an air conditioner.
  • the air conditioner includes an indoor unit and an outdoor unit that are electrically connected to each other.
  • the power supply control circuit includes an indoor unit.
  • the control module and the first relay in the control module are used to control the first relay to supply power to the outdoor unit or cut off the power supply.
  • the outdoor unit is provided with a filter capacitor.
  • the power supply control circuit also includes: a second relay and a current limiting resistor connected in series, The second relay is electrically connected to the control module, and the power-on instruction is obtained.
  • the control module controls the second relay to close to charge the filter capacitor.
  • the control module controls to open the second relay and control to close
  • the first relay is used to supply power to the outdoor unit, wherein the capacity of the first relay is greater than the capacity of the second relay, that is, the first relay is a large-capacity relay, and the second relay is a small-capacity relay.
  • the second relay with a small capacity is set to cooperate with the first relay with a large capacity in the original solution, instead of the existing technology on the indoor circuit board and the outdoor circuit board.
  • the large-capacity relay after completing the charging operation of the filter capacitor on the outdoor unit, power on the outdoor unit normally to ensure the smooth startup and operation of the outdoor unit.
  • the second relay Since the second relay is connected in series with a current limiting resistor, it is allowed to flow through a smaller value Control the current, and then set a small-capacity second relay to meet the circuit configuration requirements, so by adding a small-capacity second relay and canceling the large-capacity relay on the outdoor circuit board, on the one hand, it can reduce circuit power consumption, on the other hand No matter if the second relay and the current limiting resistor are arranged on the indoor circuit board or the outdoor circuit board, the space of the circuit board can be saved, which is beneficial to optimize the internal space of the air conditioner or facilitate the miniaturization of the outdoor unit of the air conditioner .
  • the indoor unit is first powered on.
  • the first relay is in the off state.
  • the second relay is first controlled to be closed to pass the current flowing through the current limiting resistor as The filter capacitor in the outdoor unit is charged, and the charging current is limited to prevent the filter capacitor and the second relay from being damaged by the excessive charging current.
  • the current limiting resistor Due to the characteristics of the current limiting resistor (PTC), it will heat up after charging for a period of time and the resistance will change Larger, the charging current becomes smaller and smaller, the large-capacity filter capacitor is fully charged, by setting the filter capacitor, when the outdoor unit is detected to be powered off, the filter capacitor is discharged to prevent the power supply voltage from suddenly disappearing, thereby preventing the circuit from suddenly dropping If the electricity is damaged, after charging the filter capacitor, control to close the first relay to supply power to the outdoor unit, so as to ensure that the outdoor unit can be turned on normally.
  • PTC current limiting resistor
  • the relay capacity or contact capacity is determined by the rated current allowed to flow through the relay.
  • the larger the rated current the thicker the metal coil in the relay and the larger the volume of the relay.
  • the smaller the current the thinner the metal coil in the relay and the smaller the volume of the relay. Therefore, the use of a small-capacity relay instead of a large-capacity relay will help save equipment space.
  • the second relay and the current limiting resistor are provided in the indoor unit.
  • the second relay and the current-limiting resistor in the indoor unit, the large-capacity relay on the outdoor unit is eliminated, and the thermistor setting on the outdoor unit is also eliminated.
  • the control module it is also convenient for the control module to control the second relay.
  • the current limiting resistor is specifically a thermistor.
  • the first input terminal of the control module is connected to the neutral terminal of the mains, and the second input terminal of the control module is connected to the live terminal of the mains via a current limiting resistor, wherein When the control module charges the filter capacitor through mains control, the resistance of the current limiting resistor gradually increases, so that the charging current of the filter capacitor gradually decreases until the filter capacitor is fully charged.
  • the air conditioner is supplied with electricity through the mains, as a specific setting method of the current-limiting resistor, the live wire end of the mains is connected to the control module through the current-limiting resistor to prevent the input of large current to the control module.
  • the first coil end of the second relay is connected to an external DC power supply
  • the second coil end of the second relay is connected to the control module
  • the first contact end of the second relay is connected to To the outdoor power supply live wire of the outdoor unit, the second contact terminal of the second relay is connected to the other end of the current-limiting resistor, so that the current-limiting resistor will limit the current when the filter capacitor is charged.
  • the outdoor power supply of the outdoor unit is zero.
  • the line is connected to the neutral end of the mains.
  • the two ends of the coil of the second relay are respectively connected to the control module and the external DC power supply, and the two ends of the contacts of the second relay are respectively connected to the current limiting resistor.
  • the outdoor power supply live wire it can input different voltage values through the control module, and cooperate with the external DC power supply to make the voltage difference between the two ends of the coil to close the contact, or eliminate the voltage difference to open the contact.
  • the pass limit The current limited by the current resistance is input to the outdoor unit through the closed contact and the outdoor power live wire to charge the filter capacitor of the outdoor unit, so as to realize the matching of the second relay of the small capacitor and the series current limiting resistor to the outdoor unit The function of charging the filter capacitor.
  • the first coil end of the first relay is connected to an external DC power supply
  • the second coil end of the first relay is connected to the control module
  • the first contact end of the first relay is connected To the live wire of the outdoor power supply
  • the second contact end of the first relay is connected to the live wire end of the mains to supply power to the outdoor unit through the mains.
  • the two ends of the coil of the first relay are respectively connected to the control module and the external DC power supply, and the two ends of the contacts of the second relay are respectively connected to the mains live wire
  • the terminal and the outdoor live-wire power supply can output alternating current to the outdoor unit by controlling the contact closure of the second relay to control the normal operation of high-power devices on the outdoor unit, such as compressors.
  • a relay with a coil rated current less than or equal to a specified current threshold is determined as a small-capacity relay, and a relay with a coil rated current greater than the specified current threshold is determined as a large-capacity relay.
  • the specified current threshold is 16A.
  • a relay with a coil rated current less than or equal to 16A can be used as a small-capacity relay, that is, a second relay, and a relay with a coil rated current greater than 16A can be used as a relay Large-capacity relay, namely the first relay.
  • the power supply voltage of the external DC power supply is 12V.
  • it further includes: a communication module, respectively connected to the control module and the outdoor unit, for sending a start-up operation instruction to the outdoor unit when detecting that the first relay is closed to control The outdoor unit is turned on.
  • the communication module is set on the indoor unit to realize the information interaction between the indoor unit and the outdoor unit, so that after the outdoor unit is determined to be powered on, that is, after the first relay is closed, the start operation instruction is sent to the outdoor unit , To ensure that the outdoor unit starts normally.
  • a power supply control method for an outdoor unit of an air conditioner including: in response to a power-on instruction, controlling to close a second relay to charge a filter capacitor provided on the outdoor unit; After detecting that the filter capacitor is fully charged, the second relay is controlled to open, and the first relay is controlled to close, so that the outdoor unit is powered on.
  • the second relay with a small capacity is set to cooperate with the first relay with a large capacity in the original solution, instead of the existing technology on the indoor circuit board and the outdoor circuit board.
  • the large-capacity relay after completing the charging operation of the filter capacitor on the outdoor unit, power on the outdoor unit normally to ensure the smooth startup and operation of the outdoor unit.
  • the second relay Since the second relay is connected in series with a current limiting resistor, it is allowed to flow through a smaller value Control the current, and then set a small-capacity second relay to meet the circuit configuration requirements, so by adding a small-capacity second relay and canceling the large-capacity relay on the outdoor circuit board, on the one hand, it can reduce circuit power consumption, on the other hand No matter if the second relay and the current limiting resistor are arranged on the indoor circuit board or the outdoor circuit board, the space of the circuit board can be saved, which is beneficial to optimize the internal space of the air conditioner or facilitate the miniaturization of the outdoor unit of the air conditioner .
  • it further includes: after detecting that the first relay is closed, sending a start operation instruction to the outdoor unit to control the outdoor unit to start.
  • the communication module is set on the indoor unit to realize the information interaction between the indoor unit and the outdoor unit, so that after the outdoor unit is determined to be powered on, that is, after the first relay is closed, the start operation instruction is sent to the outdoor unit , To ensure that the outdoor unit starts normally.
  • an inverter air conditioner including: the power supply control circuit according to any one of the technical solutions of the first aspect of the present application.
  • the inverter air conditioner includes an outdoor unit and an indoor unit, and a power supply control circuit provided with a first relay, a second relay, and a current-limiting resistor is provided on the circuit board of the indoor unit. While reducing the energy consumption of the inverter air conditioner, it also Conducive to the optimization of the internal space of the outdoor unit.
  • a computer-readable storage medium on which a computer program is stored.
  • the steps of the power supply control method as defined in any of the above embodiments are implemented.
  • Figure 1 shows a schematic diagram of a power supply control circuit in the related art
  • Fig. 2 shows a schematic diagram of a power supply control circuit according to an embodiment of the present application
  • Fig. 3 shows a schematic flowchart of a power supply control method according to an embodiment of the present application.
  • first and second are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
  • the features defined as “first” and “second” may explicitly or implicitly include one or more of the features.
  • “plurality” means two or more.
  • connection should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components.
  • installation should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components.
  • the first feature "above” or “below” the second feature may include the direct contact of the first and second features, or may include the first and second features Not direct contact but contact through another feature between them.
  • the first feature is “above”, “above” and “above” the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • the “below”, “below” and “below” of the first feature of the second feature include the first feature directly above and diagonally above the second feature, or it simply means that the level of the first feature is smaller than the second feature.
  • the power supply control circuit is suitable for an air conditioner.
  • the air conditioner includes an indoor unit and an outdoor unit that are electrically connected to each other.
  • the power supply control circuit includes a control module and a control module arranged in the indoor unit.
  • the first relay RY1 the control module is used to control the first relay RY1 to supply power to the outdoor unit or cut off the power supply.
  • the outdoor unit is provided with a filter capacitor.
  • the power supply control circuit also includes: a second relay RY2 connected in series and a current limiting resistor PTC.
  • the relay RY2 is electrically connected to the control module, and the power-on instruction is obtained.
  • the control module controls the second relay RY2 to close to charge the filter capacitor.
  • the control module controls to open the second relay RY2 and control Close the first relay RY1 to supply power to the outdoor unit.
  • the first relay RY1 is a large-capacity relay
  • the second relay RY2 is a small-capacity relay.
  • control module includes the CPU as shown in Figure 2.
  • the small-capacity second relay RY2 is set to cooperate with the large-capacity first relay RY1 provided in the original solution, instead of being provided on the indoor circuit board and the outdoor circuit board in the prior art. After the large-capacity relay on the outdoor unit completes the charging operation of the filter capacitor on the outdoor unit, the outdoor unit is normally powered on to ensure the smooth startup and operation of the outdoor unit.
  • the second relay RY2 Since the second relay RY2 is connected in series with the current limiting resistor PTC, it is allowed to flow through A smaller value of control current, and then a small-capacity second relay RY2 can meet the circuit configuration requirements, so by adding a small-capacity second relay RY2 and canceling the large-capacity relay on the outdoor circuit board, on the one hand, the circuit can be reduced Power consumption, on the other hand, whether the second relay RY2 and the current limiting resistor PTC are arranged on the indoor circuit board or the outdoor circuit board, the space of the circuit board can be saved, which is beneficial to optimize the internal space of the air conditioner or Miniaturized installation of outdoor unit of air conditioner.
  • the indoor unit is first energized.
  • the first relay RY1 is in an off state.
  • the second relay RY2 is first controlled to close to pass through the current limiting resistor PTC.
  • the current of the outdoor unit is used to charge the filter capacitor in the outdoor unit.
  • the charging current is limited to prevent the filter capacitor and the second relay RY2 from being damaged by the excessive charging current. Due to the PTC characteristic of the current limiting resistor, it will heat up after charging for a period of time. When the value becomes larger, the charging current becomes smaller and smaller, and the large-capacity filter capacitor is charged.
  • the relay capacity or contact capacity is determined by the rated current allowed to flow through the relay.
  • the larger the rated current the thicker the metal coil in the relay and the larger the volume of the relay.
  • the smaller the current the thinner the metal coil in the relay and the smaller the volume of the relay. Therefore, the use of a small-capacity relay instead of a large-capacity relay will help save equipment space.
  • the specific setting positions of the second relay RY2 and the current-limiting resistor PTC are further limited, that is, the second relay RY2 and the current-limiting resistor PTC are set in the indoor unit.
  • the second relay RY2 and the current-limiting resistor PTC in the indoor unit, the large-capacity relay on the outdoor unit is eliminated, and the thermistor setting on the outdoor unit is also eliminated.
  • the control module it is also convenient for the control module to control the second relay RY2.
  • the current limiting resistor PTC is specifically a thermistor.
  • the first input terminal of the control module is connected to the mains neutral terminal ACN, and the second input terminal of the control module is connected to the mains live terminal ACL through the current limiting resistor PTC.
  • the resistance of the current limiting resistor PTC gradually increases, so that the charging current of the filter capacitor gradually decreases until the filter capacitor is completely charged.
  • the air conditioner is powered by the mains power as a specific setting method of the current-limiting resistance PTC.
  • the mains live wire end ACL is connected to the control module through the current-limiting resistance PTC to prevent input to the control module High Current.
  • the first coil end 1 of the second relay RY2 is connected to an external DC power supply
  • the second coil end 2 of the second relay RY2 is connected to the control module
  • the first coil end of the second relay RY2 is connected to the control module.
  • One contact terminal 3 is connected to the outdoor power source CON live wire of the outdoor unit
  • the second contact terminal 4 of the second relay RY2 is connected to the other end of the current limiting resistor PTC, so that when the filter capacitor is charged, the current limiting resistor PTC performs Current limiting, where the outdoor power CON neutral line of the outdoor unit is connected to the mains neutral terminal ACN.
  • the two ends of the coil of the second relay RY2 are respectively connected to the control module and the external DC power supply, and the two ends of the contact points of the second relay RY2 are respectively connected to
  • the current-limiting resistance PTC and the outdoor power CON live wire can input different voltage values through the control module, and cooperate with the external DC power supply to make the voltage difference between the two ends of the coil to close the contact, or eliminate the voltage difference to make the contact open.
  • the current limited by the current limiting resistor PTC is input to the outdoor unit through the closed contact and the outdoor power CON live wire to charge the filter capacitor of the outdoor unit, so as to realize the second relay RY2 through the small capacitor in series with
  • the current-limiting resistance PTC cooperates with the function of charging the filter capacitor of the outdoor unit.
  • the first coil end 1 of the first relay RY1 is connected to an external DC power supply
  • the second coil end 2 of the first relay RY1 is connected to the control module
  • the first coil end of the first relay RY1 is connected to the control module.
  • a contact terminal 3 is connected to the outdoor power CON live line
  • the second contact terminal 4 of the first relay RY1 is connected to the mains live line ACL, so as to supply power to the outdoor unit through the mains.
  • the coil ends of the first relay RY1 are connected to the control module and the external DC power supply respectively, and the contact ends of the second relay RY2 are respectively connected to The mains live-wire terminal ACL and the outdoor live-wire power supply output alternating current to the outdoor unit by controlling the contact closure of the second relay RY2 to control the normal operation of high-power devices on the outdoor unit, such as compressors.
  • a relay with a coil rated current less than or equal to 16A is determined as a small-capacity relay, and a relay with a coil rated current greater than 16A is determined as a large-capacity relay.
  • a relay with a coil rated current less than or equal to 16A can be used as a small-capacity relay, that is, the second relay RY2, and a relay with a coil rated current greater than 16A As a large-capacity relay, the first relay RY1.
  • the power supply voltage of the external DC power supply is 12V.
  • it further includes: a communication module, respectively connected to the control module and the outdoor unit, for sending a start operation instruction to the outdoor unit when detecting that the first relay RY1 is closed. Control the outdoor unit to turn on.
  • the communication module is set on the indoor unit to realize the information exchange between the indoor unit and the outdoor unit, so that after it is determined that the outdoor unit is powered on, that is, after the first relay RY1 is closed, the outdoor unit is sent to start running Command to ensure that the outdoor unit starts normally.
  • the power supply control method according to the embodiment of the present application includes:
  • Step 302 in response to the power-on instruction, control to close the second relay to charge the filter capacitor provided on the outdoor unit;
  • Step 304 After detecting that the filter capacitor is fully charged, control to open the second relay and control to close the first relay, so that the outdoor unit is powered on.
  • a second relay with a small capacity is set to cooperate with the first relay with a large capacity in the original solution, instead of the prior art on the indoor circuit board and the outdoor circuit board.
  • the large-capacity relay after completing the charging operation of the filter capacitor on the outdoor unit, power on the outdoor unit normally to ensure the smooth startup and operation of the outdoor unit.
  • the second relay Since the second relay is connected in series with a current limiting resistor, it is allowed to flow through a smaller value Control the current, and then set a small-capacity second relay to meet the circuit configuration requirements, so by adding a small-capacity second relay and canceling the large-capacity relay on the outdoor circuit board, on the one hand, it can reduce circuit power consumption, on the other hand No matter if the second relay and the current limiting resistor are arranged on the indoor circuit board or the outdoor circuit board, the space of the circuit board can be saved, which is beneficial to optimize the internal space of the air conditioner or facilitate the miniaturization of the outdoor unit of the air conditioner .
  • detecting whether the filter capacitor is fully charged can be determined by detecting whether the charging duration reaches a preset duration threshold, or by detecting a change in the charging circuit.
  • the method further includes: after detecting that the first relay is closed, sending a start operation instruction to the outdoor unit to control the outdoor unit to start.
  • the communication module is set on the indoor unit to realize the information interaction between the indoor unit and the outdoor unit, so that after the outdoor unit is determined to be powered on, that is, after the first relay is closed, the start operation instruction is sent to the outdoor unit , To ensure that the outdoor unit starts normally.
  • An inverter air conditioner includes: the power supply control circuit described in any one of the above embodiments.
  • the inverter air conditioner includes an outdoor unit and an indoor unit, and a power supply control circuit provided with a first relay, a second relay, and a current-limiting resistor is provided on the circuit board of the indoor unit. While reducing the energy consumption of the inverter air conditioner, it also Conducive to the optimization of the internal space of the outdoor unit.
  • an additional small-capacity relay is installed in the indoor unit to realize the purpose of saving large-capacity relays of the outdoor unit and thermistors of the outdoor unit.
  • the indoor unit is powered on first when the air conditioner is powered on, while the outdoor unit is not powered on because the first relay RY1 and the second relay RY2 are in the off state.
  • the control module in the indoor unit The group controls the second relay RY2 to close, and the city power charges the large-capacity filter capacitor of the outdoor unit through the thermistor PTC, the second relay RY2 and the indoor and outdoor power connection line CON.
  • the first relay RY1 is controlled to close, and the second relay RY2 is controlled to open, and the outdoor unit is notified of the completion of power-on through the communication module, so as to ensure that it can be turned on normally.
  • the second relay RY2 By providing the existence of the second relay RY2, it is possible to avoid repeated installation of large-capacity relays and thermistors on the circuit board of the outdoor unit, and to reduce the circuit board area of the outdoor unit, thereby helping to reduce the manufacturing cost of the air conditioner.
  • a computer-readable storage medium has a computer program stored thereon, and when the computer program is executed, the steps of the power supply control method defined in any of the above embodiments are implemented.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

本申请提供了一种供电控制电路和变频空调器，其中，供电控制电路包括：设置于室内机中的控制模组与第一继电器，控制模组用于控制第一继电器对室外机供电或切断供电，室外机上设置有滤波电容，供电控制电路还包括：串联的第二继电器与限流电阻，第二继电器电连接至控制模组，获取到上电指令，控制模组控制第二继电器闭合，以对滤波电容进行充电，滤波电容充电完毕，控制模组控制断开第二继电器，并控制闭合第一继电器，以对室外机进行供电，其中，第一继电器的容量大于第二继电器的容量。通过本申请的技术方案，能够降低电路功耗并节省电路板空间。

Description

供电控制电路和变频空调器
本申请要求于2019年01月16日提交中国专利局、申请号为201920071616.6、发明创造名称为“供电控制电路和变频空调器”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
本申请涉及空调技术领域，具体而言，涉及一种供电控制电路和一种变频空调器。
背景技术
相关技术中，需要采用两个大电流的继电器对变频空调器中的室外机进行供电控制，如图1所示，其中一个设置于室内的电路板上，另一个设置于室外的电路板上，在对室外机进行供电时需要先开启室内机中的继电器，使室外机得电，而由于室外机具有大滤波电容，故必须将热敏电阻串联到主回路，以先为大电容充电，然后利用室外的大电流继电器对热敏电阻进行短接，该控制电路目前存在以下缺陷：
(1)大电流继电器的成本较高，并且需要较大的控制电流，因此能耗较大；
(2)大电流继电器的体积较大，因此占用较多的电路板空间。
申请内容
本申请旨在至少解决现有技术或相关技术中存在的技术问题之一。
为此，本申请的一个目的在于提供一种供电控制电路。
本申请的再一个目的在于提供一种变频空调器。
为了实现上述目的，根据本申请的第一方面的实施例，提供了一种供电控制电路，适用于空调器，空调器包括相互电联的室内机与室外机，供 电控制电路包括设置于室内机中的控制模组与第一继电器，控制模组用于控制第一继电器对室外机供电或切断供电，室外机上设置有滤波电容，供电控制电路还包括：串联的第二继电器与限流电阻，第二继电器电连接至控制模组，获取到上电指令，控制模组控制第二继电器闭合，以对滤波电容进行充电，滤波电容充电完毕，控制模组控制断开第二继电器，并控制闭合第一继电器，以对室外机进行供电，其中，所述第一继电器的容量大于所述第二继电器的容量，即第一继电器为大容量继电器，第二继电器为小容量继电器。
在该技术方案中，通过设置小容量的第二继电器与原有方案中设置的大容量的第一继电器配合，以代替现有技术中设置于分别设置于室内电路板上以及室外电路板上的大容量继电器，在完成对室外机上的滤波电容的充电操作后，对室外机正常上电，以保证室外机的顺利启动运行，由于第二继电器串联有限流电阻，因此允许流过较小值的控制电流，进而设置小容量的第二继电器即可满足电路配置需求，从而通过增加小容量的第二继电器并取消室外电路板上的大容量继电器，一方面，能够降低电路功耗，另一方面，无论将第二继电器与限流电阻设置于室内电路板上还是室外电路板上，都能够节省电路板空间，从而有利于对空调器内部空间进行优化或有利于空调器室外机的小型化设置。
具体地，空调器上电时，室内机首先通电，此时第一继电器处于断开状态，在室外机需要上电启动时，首先控制第二继电器闭合，以通过流经限流电阻的电流为室外机中的滤波电容进行充电，通过对充电电流进行限流，以防止充电电流过大损坏滤波电容与第二继电器，由于限流电阻(PTC)特性，在充电一段时间后发热，阻值变大，充电电流则越来越小，大容量的滤波电容充电完毕，通过设置滤波电容，在检测到室外机突然掉电时，通过滤波电容放电使供电电压不会突然消失，进而防止电路突然掉电出现损坏，在对滤波电容充电完毕后，控制闭合第一继电器，以对室外机进行供电，从而保证室外机能够正常开机。
其中，本领域的技术人员理解的是，继电器容量或触点容量由允许流过继电器的额定电流决定，额定电流越大，继电器中的金属线圈会越粗，继电器的体积就会越大，额定电流越小，继电器中的金属线圈则会越细，继电器的体积就会越小，因此采用小容量继电器代替大容量继电器，有利 于节省设备空间。
在上述技术方案中，优选地，第二继电器与限流电阻设置于室内机中。
在该技术方案中，通过将第二继电器与限流电阻均设置于室内机中，在取消室外机上的大容量继电器的同时，还取消了室外机上热敏电阻的设置，一方面，有利于进一步节省室外机的电路板空间，另一方面，也便于控制模组对于第二继电器的控制。
其中，限流电阻具体为热敏电阻。
在上述任一项技术方案中，优选地，控制模组的第一输入端连接至市电零线端，所述控制模组的第二输入端通过限流电阻连接至市电火线端，其中，在控制模组通过市电控制对滤波电容充电的过程中，限流电阻的阻值逐渐增大，以使滤波电容的充电电流逐渐减小，直至滤波电容充电完毕。
在该技术方案中，通过市电对空调器进行供电，作为限流电阻的一种具体设置方式，市电火线端通过限流电阻连接至控制模组，以防止向控制模组输入大电流。
在上述任一项技术方案中，优选地，第二继电器的第一线圈端连接至外接直流电源，第二继电器的第二线圈端连接至控制模组，第二继电器的第一触点端连接至室外机的室外电源火线，第二继电器的第二触点端连接至限流电阻的另一端，以在滤波电容进行充电时，由限流电阻进行限流，其中，室外机的室外电源零线连接至市电零线端。
在该技术方案中，作为第二继电器的以一种具体连接方式，第二继电器的线圈两端分别连接至控制模组与外接直流电源，第二继电器的触点两端分别连接至限流电阻与室外电源火线，以通过控制模组输入不同的电压值，与外接直流电源配合，使线圈两端产生电压差使触点闭合，或消除电压差使触点断开，在触点闭合时，通过限流电阻限流后的电流通过闭合的触点与室外电源火线输入至室外机，以对室外机的滤波电容进行充电，从而实现通过小电容的第二继电器与串联的限流电阻配合对室外机的滤波电容进行充电的功能。
在上述任一项技术方案中，优选地，第一继电器的第一线圈端连接至外接直流电源，第一继电器的第二线圈端连接至控制模组，第一继电器的第一触点端连接至室外电源火线，第一继电器的第二触点端连接至市电火线端，以通过市电对室外机供电。
在该技术方案中，作为第一继电器的以一种具体连接方式，第一继电器的线圈两端分别连接至控制模组与外接直流电源，第二继电器的触点两端分别连接至市电火线端与室外火线电源，以通过控制第二继电器的触点闭合向室外机输出交流电，以控制室外机上大功率的器件，比如压缩机等正常运行。
在上述任一项技术方案中，优选地，将线圈额定电流小于或等于指定电流阈值的继电器确定为小容量继电器，将线圈额定电流大于指定电流阈值的继电器确定为大容量继电器。
其中，指定电流阈值为16A。
在该技术方案中，作为大容量电容与小容量电容的一种限定方式，可以将线圈额定电流小于或等于16A的继电器作为小容量继电器，即第二继电器，将线圈额定电流大于16A的继电器作为大容量继电器，即第一继电器。
在上述任一项技术方案中，优选地，外接直流电源的供电电压为12V。
在上述任一项技术方案中，优选地，还包括：通信模组，分别连接至控制模组与室外机，用于在检测到第一继电器闭合时，向室外机发送启动运行指令，以控制室外机开机。
在该技术方案中，通过在室内机上设置通信模组，以实现室内机与室外机之间的信息交互，从而在确定室外机上电后，即第一继电器闭合后，向室外机发送启动运行指令，以保证室外机正常开机。
根据本申请的第二方面的实施例，提供了一种空调器室外机的供电控制方法，包括：响应于上电指令，控制闭合第二继电器，以对设置于室外机上的滤波电容进行充电；在检测到对滤波电容充电完毕后，控制断开第二继电器，并控制闭合第一继电器，以使室外机上电。
在该技术方案中，通过设置小容量的第二继电器与原有方案中设置的大容量的第一继电器配合，以代替现有技术中设置于分别设置于室内电路板上以及室外电路板上的大容量继电器，在完成对室外机上的滤波电容的充电操作后，对室外机正常上电，以保证室外机的顺利启动运行，由于第二继电器串联有限流电阻，因此允许流过较小值的控制电流，进而设置小容量的第二继电器即可满足电路配置需求，从而通过增加小容量的第二继电器并取消室外电路板上的大容量继电器，一方面，能够降低电路功耗， 另一方面，无论将第二继电器与限流电阻设置于室内电路板上还是室外电路板上，都能够节省电路板空间，从而有利于对空调器内部空间进行优化或有利于空调器室外机的小型化设置。
在上述技术方案中，优选地，还包括：在检测到第一继电器闭合后，向室外机发送启动运行指令，以控制室外机开机。
在该技术方案中，通过在室内机上设置通信模组，以实现室内机与室外机之间的信息交互，从而在确定室外机上电后，即第一继电器闭合后，向室外机发送启动运行指令，以保证室外机正常开机。
根据本申请的第三方面的实施例，提供了一种变频空调器，包括：如本申请第一方面任一项技术方案所述的供电控制电路。
具体地，变频空调器包括室外机与室内机，设置有第一继电器与第二继电器以及限流电阻的供电控制电路设置在室内机的电路板上，在降低变频空调器能耗的同时，还有利于室外机内部空间的优化。
根据本申请的第四方面的实施例，提供了一种计算机可读存储介质，其上存储有计算机程序，计算机程序被执行时，实现如上述任一项实施例限定的供电控制方法的步骤。
本申请的附加方面和优点将在下面的描述部分中给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1示出了相关技术中的供电控制电路的示意图；
图2示出了根据本申请的一个实施例的供电控制电路的示意图；
图3示出了根据本申请的一个实施例的供电控制方法的示意流程图。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申 请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度小于第二特征。
实施例一
如图2所示，根据本申请的一个实施例的供电控制电路，适用于空调器，空调器包括相互电联的室内机与室外机，供电控制电路包括设置于室内机中的控制模组与第一继电器RY1，控制模组用于控制第一继电器RY1对室外机供电或切断供电，室外机上设置有滤波电容，供电控制电路还包括：串联的第二继电器RY2与限流电阻PTC，第二继电器RY2电连接至控制模组，获取到上电指令，控制模组控制第二继电器RY2闭合，以对滤 波电容进行充电，滤波电容充电完毕，控制模组控制断开第二继电器RY2，并控制闭合第一继电器RY1，以对室外机进行供电，其中，第一继电器RY1为大容量继电器，第二继电器RY2为小容量继电器。
其中，控制模组包括如图2所示的CPU。
在该实施例中，通过设置小容量的第二继电器RY2与原有方案中设置的大容量的第一继电器RY1配合，以代替现有技术中设置于分别设置于室内电路板上以及室外电路板上的大容量继电器，在完成对室外机上的滤波电容的充电操作后，对室外机正常上电，以保证室外机的顺利启动运行，由于第二继电器RY2串联有限流电阻PTC，因此允许流过较小值的控制电流，进而设置小容量的第二继电器RY2即可满足电路配置需求，从而通过增加小容量的第二继电器RY2并取消室外电路板上的大容量继电器，一方面，能够降低电路功耗，另一方面，无论将第二继电器RY2与限流电阻PTC设置于室内电路板上还是室外电路板上，都能够节省电路板空间，从而有利于对空调器内部空间进行优化或有利于空调器室外机的小型化设置。
具体地，空调器上电时，室内机首先通电，此时第一继电器RY1处于断开状态，在室外机需要上电启动时，首先控制第二继电器RY2闭合，以通过流经限流电阻PTC的电流为室外机中的滤波电容进行充电，通过对充电电流进行限流，以防止充电电流过大损坏滤波电容与第二继电器RY2，由于限流电阻PTC特性，在充电一段时间后发热，阻值变大，充电电流则越来越小，大容量的滤波电容充电完毕，通过设置滤波电容，在检测到室外机突然掉电时，通过滤波电容放电使供电电压不会突然消失，进而防止电路突然掉电出现损坏，在对滤波电容充电完毕后，控制闭合第一继电器RY1，以对室外机进行供电，从而保证室外机能够正常开机。
其中，本领域的技术人员理解的是，继电器容量或触点容量由允许流过继电器的额定电流决定，额定电流越大，继电器中的金属线圈会越粗，继电器的体积就会越大，额定电流越小，继电器中的金属线圈则会越细，继电器的体积就会越小，因此采用小容量继电器代替大容量继电器，有利于节省设备空间。
实施例二
对第二继电器RY2与限流电阻PTC的具体设置位置进行进一步限定，即将第二继电器RY2与限流电阻PTC设置于室内机中。
在该实施例中，通过将第二继电器RY2与限流电阻PTC均设置于室内机中，在取消室外机上的大容量继电器的同时，还取消了室外机上热敏电阻的设置，一方面，有利于进一步节省室外机的电路板空间，另一方面，也便于控制模组对于第二继电器RY2的控制。
其中，限流电阻PTC具体为热敏电阻。
在上述任一项实施例中，优选地，控制模组的第一输入端连接至市电零线端ACN，控制模组的第二输入端通过限流电阻PTC连接至市电火线端ACL，其中，在控制模组通过市电控制对滤波电容充电的过程中，限流电阻PTC的阻值逐渐增大，以使滤波电容的充电电流逐渐减小，直至滤波电容充电完毕。
在该实施例中，通过市电对空调器进行供电，作为限流电阻PTC的一种具体设置方式，市电火线端ACL通过限流电阻PTC连接至控制模组，以防止向控制模组输入大电流。
实施例三
在上述任一项实施例中，优选地，第二继电器RY2的第一线圈端1连接至外接直流电源，第二继电器RY2的第二线圈端2连接至控制模组，第二继电器RY2的第一触点端3连接至室外机的室外电源CON火线，第二继电器RY2的第二触点端4连接至限流电阻PTC的另一端，以在滤波电容进行充电时，由限流电阻PTC进行限流，其中，室外机的室外电源CON零线连接至市电零线端ACN。
在该实施例中，作为第二继电器RY2的以一种具体连接方式，第二继电器RY2的线圈两端分别连接至控制模组与外接直流电源，第二继电器RY2的触点两端分别连接至限流电阻PTC与室外电源CON火线，以通过控制模组输入不同的电压值，与外接直流电源配合，使线圈两端产生电压差使触点闭合，或消除电压差使触点断开，在触点闭合时，通过限流电阻PTC限流后的电流通过闭合的触点与室外电源CON火线输入至室外机，以对室外机的滤波电容进行充电，从而实现通过小电容的第二继电器RY2与串联的限流电阻PTC配合对室外机的滤波电容进行充电的功能。
实施例四
在上述任一项实施例中，优选地，第一继电器RY1的第一线圈端1连接至外接直流电源，第一继电器RY1的第二线圈端2连接至控制模组，第 一继电器RY1的第一触点端3连接至室外电源CON火线，第一继电器RY1的第二触点端4连接至市电火线端ACL，以通过市电对室外机供电。
在该实施例中，作为第一继电器RY1的以一种具体连接方式，第一继电器RY1的线圈两端分别连接至控制模组与外接直流电源，第二继电器RY2的触点两端分别连接至市电火线端ACL与室外火线电源，以通过控制第二继电器RY2的触点闭合向室外机输出交流电，以控制室外机上大功率的器件，比如压缩机等正常运行。
在上述任一项实施例中，优选地，将线圈额定电流小于或等于16A的继电器确定为小容量继电器，将线圈额定电流大于16A的继电器确定为大容量继电器。
在该实施例中，作为大容量电容与小容量电容的一种限定方式，可以将线圈额定电流小于或等于16A的继电器作为小容量继电器，即第二继电器RY2，将线圈额定电流大于16A的继电器作为大容量继电器，即第一继电器RY1。
在上述任一项实施例中，优选地，外接直流电源的供电电压为12V。
在上述任一项实施例中，优选地，还包括：通信模组，分别连接至控制模组与室外机，用于在检测到第一继电器RY1闭合时，向室外机发送启动运行指令，以控制室外机开机。
在该实施例中，通过在室内机上设置通信模组，以实现室内机与室外机之间的信息交互，从而在确定室外机上电后，即第一继电器RY1闭合后，向室外机发送启动运行指令，以保证室外机正常开机。
实施例五：
如图3所示，根据本申请的实施例的供电控制方法，包括：
步骤302，响应于上电指令，控制闭合第二继电器，以对设置于室外机上的滤波电容进行充电；
步骤304，在检测到对滤波电容充电完毕后，控制断开第二继电器，并控制闭合第一继电器，以使室外机上电。
在该实施例中，通过设置小容量的第二继电器与原有方案中设置的大容量的第一继电器配合，以代替现有技术中设置于分别设置于室内电路板上以及室外电路板上的大容量继电器，在完成对室外机上的滤波电容的充电操作后，对室外机正常上电，以保证室外机的顺利启动运行，由于第二 继电器串联有限流电阻，因此允许流过较小值的控制电流，进而设置小容量的第二继电器即可满足电路配置需求，从而通过增加小容量的第二继电器并取消室外电路板上的大容量继电器，一方面，能够降低电路功耗，另一方面，无论将第二继电器与限流电阻设置于室内电路板上还是室外电路板上，都能够节省电路板空间，从而有利于对空调器内部空间进行优化或有利于空调器室外机的小型化设置。
具体地，检测滤波电容是否充电完成，可以通过检测充电时长是否达到预设时长阈值来确定，还可以通过检测充电电路的变化来确定。
在上述实施例中，优选地，还包括：在检测到第一继电器闭合后，向室外机发送启动运行指令，以控制室外机开机。
在该实施例中，通过在室内机上设置通信模组，以实现室内机与室外机之间的信息交互，从而在确定室外机上电后，即第一继电器闭合后，向室外机发送启动运行指令，以保证室外机正常开机。
根据本申请的实施例的变频空调器，包括：上述任一项实施例所述的供电控制电路。
具体地，变频空调器包括室外机与室内机，设置有第一继电器与第二继电器以及限流电阻的供电控制电路设置在室内机的电路板上，在降低变频空调器能耗的同时，还有利于室外机内部空间的优化。
本申请在室内机中多安装一个小容量继电器从而实现节省室外机大容量继电器以及室外机热敏电阻的目的。
如图2所示，空调器上电时室内机先通电，而室外机由于第一继电器RY1以及第二继电器RY2处于断开状态而没有通电，当需要开启室外机时，室内机中的控制模组控制第二继电器RY2闭合，市电通过热敏电阻PTC、第二继电器RY2以及室内外电源连接线CON为室外机大容量的滤波电容进行充电。
在大容量的滤波电容充电完毕后，控制闭合第一继电器RY1，并控制断开第二继电器RY2，并通过通信模块通知室外机上电完成，从而保证能够正常开机。
通过设置第二继电器RY2的存在，能够避免在室外机的电路板上重复安装大容量继电器以及热敏电阻，并能够减少室外机的电路板面积，从而有利于降低空调器的制备成本。
根据本申请的一个实施例的计算机可读存储介质，其上存储有计算机程序，计算机程序被执行时，实现如上述任一项实施例限定的供电控制方法的步骤。
与现有技术相比，本申请技术方案中公开的实施例至少具有下述有益效果：
(1)取消室外机上用于使室外机上的限流电阻短接的大容量继电器，通过设置串联的小容量继电器与限流电阻，以降低制备成本并降低设备能耗。
(2)通过取消室外机的大电流继电器，以减少对室外机电路板空间的占用。
以上结合附图详细说明了本申请的技术方案，通过本申请的技术方案，通过增加小容量的第二继电器并取消室外电路板上的大容量继电器，一方面，能够降低电路功耗，另一方面，无论将第二继电器与限流电阻设置于室内电路板上还是室外电路板上，都能够节省电路板空间，从而有利于对空调器内部空间进行优化或有利于空调器室外机的小型化设置。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本申请的实施例，本领域的普通技术人员可以理解：在不脱离本申请的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (9)

  1. 一种供电控制电路，适用于空调器，所述空调器包括相互电联的室内机与室外机，其中，所述供电控制电路包括设置于所述室内机中的控制模组与第一继电器，所述控制模组用于控制所述第一继电器对所述室外机供电或切断供电，所述室外机上设置有滤波电容，所述供电控制电路还包括：
    串联的第二继电器与限流电阻，所述第二继电器电连接至所述控制模组，
    获取到上电指令，所述控制模组控制第二继电器闭合，以对所述滤波电容进行充电，所述滤波电容充电完毕，所述控制模组控制断开所述第二继电器，并控制闭合第一继电器，以对所述室外机进行供电，所述第一继电器的容量大于所述第二继电器的容量。
  2. 根据权利要求1所述的供电控制电路，其中，
    所述第二继电器与所述限流电阻设置于所述室内机中。
  3. 根据权利要求2所述的供电控制电路，其中，
    所述控制模组的第一输入端连接至市电零线端；
    所述控制模组的第二输入端通过所述限流电阻连接至所述市电火线端，
    在所述控制模组通过所述市电控制对所述滤波电容充电的过程中，所述限流电阻的阻值逐渐增大，以使所述滤波电容的充电电流逐渐减小，直至所述滤波电容充电完毕。
  4. 根据权利要求3所述的供电控制电路，其中，
    所述第二继电器的第一线圈端连接至外接直流电源，所述第二继电器的第二线圈端连接至所述控制模组，所述第二继电器的第一触点端连接至室外机的室外电源火线，所述第二继电器的第二触点端连接至所述限流电阻的另一端，以在所述滤波电容进行充电时，由所述限流电阻进行限流，所述室外机的室外电源零线连接至所述市电零线端。
  5. 根据权利要求4所述的供电控制电路，其中，
    所述第一继电器的第一线圈端连接至所述外接直流电源，所述第一继电器的第二线圈端连接至所述控制模组，所述第一继电器的第一触点端连接至所述室外电源火线，所述第一继电器的第二触点端连接至所述市电火 线端，以通过市电对所述室外机供电。
  6. 根据权利要求1至5中任一项所述的供电控制电路，其中，
    所述第二继电器的线圈额定电流小于或等于指定电流阈值；
    所述第一继电器的线圈额定电流小于或等于所述指定电流阈值。
  7. 根据权利要求4或5所述的供电控制电路，其中，
    所述外接直流电源的供电电压为12V。
  8. 根据权利要求1至7中任一项所述的供电控制电路，其中，还包括：
    通信模组，分别连接至所述控制模组与所述室外机，用于在检测到所述第一继电器闭合时，向所述室外机发送启动运行指令，以控制所述室外机开机。
  9. 一种变频空调器，其中，包括：
    如权利要求1至8中任一项所述的供电控制电路。
PCT/CN2019/088306 2019-01-16 2019-05-24 供电控制电路和变频空调器 WO2020147234A1 (zh)

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