WO2020181770A1 - Procédé de commande d'appareil électroménager et appareil électroménager - Google Patents

Procédé de commande d'appareil électroménager et appareil électroménager Download PDF

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Publication number
WO2020181770A1
WO2020181770A1 PCT/CN2019/112326 CN2019112326W WO2020181770A1 WO 2020181770 A1 WO2020181770 A1 WO 2020181770A1 CN 2019112326 W CN2019112326 W CN 2019112326W WO 2020181770 A1 WO2020181770 A1 WO 2020181770A1
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WIPO (PCT)
Prior art keywords
impedance
power supply
supply circuit
circuit
preset
Prior art date
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PCT/CN2019/112326
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English (en)
Chinese (zh)
Inventor
梁敏游
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广东美的制冷设备有限公司
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Publication of WO2020181770A1 publication Critical patent/WO2020181770A1/fr

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    • 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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/10—The network having a local or delimited stationary reach
    • H02J2310/12—The local stationary network supplying a household or a building
    • H02J2310/14—The load or loads being home appliances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/242—Home appliances

Definitions

  • the present disclosure relates to the technical field of electrical appliances, in particular to a control method of household appliances and household appliances.
  • PFC circuits are used in PFC circuits.
  • Electrical components such as inductors or reactors are installed. When current is generated in the circuit, the inductor or reactor will consume a certain amount of power, and the greater the current, the greater the power consumed.
  • the inductor or reactor Since the inductance or reactor has been installed on the machine, the power consumption is only related to the current flowing through the whole machine. There is a relationship, the power cannot be reduced by other means, which causes the power consumption of the electrical system to increase, and when the electrical appliance is running at low frequency, the power of the impedance element in the electrical circuit cannot be effectively reduced to reduce the power consumption.
  • the present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.
  • the first purpose of the present disclosure is to propose a control method for household appliances, which can be used when the operating frequency of the load of the household appliance is less than the first preset frequency and the impedance of the power supply circuit is greater than the preset impedance.
  • it can reduce the impedance of the power supply circuit, so that the power consumed on the impedance element can be reduced.
  • it can reduce the overall power consumption of the household appliance.
  • it will not affect the normal operation of the household appliance. influences.
  • the second purpose of the present disclosure is to propose a household appliance.
  • the first aspect of the present disclosure provides a method for controlling household appliances, including: obtaining the operating frequency of the load of the household appliance and connecting to a power supply circuit for the household appliance to supply power to the load The impedance; the operating frequency is less than the first preset frequency and the impedance connected to the power supply circuit is greater than the preset impedance, reducing the impedance connected to the power supply circuit.
  • the impedance of the power supply circuit can be reduced .
  • the impedance of the power supply circuit can reduce the overall power consumption of the household appliance, on the other hand, it will not affect the normal operation of the household appliance.
  • the method for controlling household appliances proposed according to the foregoing embodiments of the present disclosure may also have the following additional technical features:
  • the power supply circuit includes a plurality of impedance elements connected in series to reduce the impedance connected to the power supply circuit, including: short-circuiting one or more of the plurality of impedance elements to reduce access The impedance of the power supply circuit.
  • At least one or more of the plurality of impedance elements are connected in parallel with a switching element, and short-circuiting one or more of the plurality of impedance elements includes: controlling the switching element to close to short One or more of the multiple impedance elements are connected.
  • the switch element is a holding switch element, the switch element is connected with a switch circuit, and the control method includes: controlling a first control signal and a second control input to the switch circuit The level of the signal controls the working state of the switch, and the working state includes closed and open.
  • the control method includes: outputting the first control signal of a high level for a preset period of time and continuously outputting the second control signal of a low level to close the switch; Continuously outputting the first control signal of low level and the second control signal of outputting high level for the preset period of time, turning off the switch element.
  • control method includes: maintaining access when the operating frequency is less than the first preset frequency and the impedance connected to the power supply circuit is not greater than the preset impedance. The impedance of the power supply circuit remains unchanged.
  • the control method includes: keeping the power supply connected when the operating frequency is greater than a second preset frequency and the impedance connected to the power supply circuit is greater than the preset impedance The impedance of the circuit remains unchanged; when the operating frequency is greater than the second preset frequency and the impedance connected to the power supply circuit is not greater than the preset impedance, the impedance connected to the power supply circuit is increased, wherein , The second preset frequency is greater than the first preset frequency.
  • control method includes: when the operating frequency is not less than the first preset frequency and not greater than the second preset frequency, maintaining access to the power supply circuit The impedance is unchanged.
  • the power supply circuit includes a power supply circuit and a storage circuit
  • the control method includes: controlling the power supply circuit to store energy for the impedance element through the storage circuit; controlling the power supply circuit The impedance element after energy storage provides power to the load.
  • controlling the power supply circuit to store energy for the impedance element through the energy storage circuit includes: turning on a switching transistor of the energy storage circuit so that the power supply circuit passes through the energy storage The circuit stores energy for the impedance element; controlling the power supply circuit and the impedance element after energy storage to supply power to the load includes: turning off the switching transistor of the energy storage circuit so that the power supply circuit and the stored energy The impedance element provides power to the load.
  • the second aspect of the implementation of the present disclosure proposes a household appliance, which includes a control device, a power supply circuit, and a load, the control device is connected to the power supply circuit and the load, and the power supply circuit is used for The load is supplied with power, and the control device is used to obtain the operating frequency of the load and the impedance connected to the power supply circuit, and to obtain the power supply circuit when the operating frequency is lower than the first preset frequency.
  • the impedance is greater than the preset impedance, the impedance connected to the power supply circuit is reduced.
  • the impedance of the power supply circuit when the operating frequency of the load of the home appliance is less than the first preset frequency and the impedance of the power supply circuit is greater than the preset impedance, the impedance of the power supply circuit can be reduced, so that the consumption
  • the power reduction on the impedance element can reduce the overall power consumption of the household appliance on the one hand, and on the other hand, it will not affect the normal operation of the household appliance.
  • the household appliances proposed according to the above embodiments of the present disclosure may also have the following additional technical features:
  • the power supply circuit includes a plurality of impedance elements connected in series, and the control device is used to short-circuit one or several of the plurality of impedance elements to reduce the impedance connected to the power supply circuit .
  • At least one or several of the plurality of impedance elements are connected in parallel with a switching element, and the control device is used to control the switching element to close to short-circuit one or one of the plurality of impedance elements. several.
  • the switch element is a holding switch element, the switch element is connected with a switch circuit, and the control device is used to control the first control signal and the second control input to the switch circuit
  • the level of the signal controls the working state of the switch, and the working state includes closed and open.
  • control device is used to control the output of the first control signal of a high level for a preset period of time and continuously output the second control signal of a low level to close the switch element , And used for continuously outputting the first control signal of low level and the second control signal of outputting high level for the preset period of time to turn off the switch.
  • control device is configured to maintain access when the operating frequency is less than the first preset frequency and the impedance connected to the power supply circuit is not greater than the preset impedance.
  • the impedance of the power supply circuit remains unchanged.
  • control device is configured to keep the power supply connected when the operating frequency is greater than the second preset frequency and the impedance connected to the power supply circuit is greater than the preset impedance
  • the impedance of the circuit remains unchanged, and when the operating frequency is greater than the second preset frequency and the impedance connected to the power supply circuit is not greater than the preset impedance, the power supply circuit is increased Impedance, wherein the second preset frequency is greater than the first preset frequency.
  • control device is configured to keep the power supply circuit connected to the power supply circuit when the operating frequency is not less than the first preset frequency and not greater than the second preset frequency.
  • the impedance is unchanged.
  • the power supply circuit includes a power supply circuit and an energy storage circuit
  • the control device is used for controlling the power supply circuit to store energy for the impedance element through the energy storage circuit, and for controlling the The power supply circuit and the impedance element after energy storage provide power to the load.
  • the control device is used to turn on the switching transistor of the tank circuit so that the power supply circuit stores energy for the impedance element through the tank circuit, and is used to turn off the The switching transistor of the energy storage circuit enables the power supply circuit and the impedance element after energy storage to supply power to the load.
  • FIG. 1 is a schematic flowchart of a control method of a household appliance according to an embodiment of the present disclosure
  • Fig. 2 is a schematic diagram of modules of a household appliance according to an embodiment of the present disclosure
  • FIG. 3 is another schematic flow chart of the control method of the household appliance according to the embodiment of the present disclosure.
  • Figure 4 is a schematic diagram of a circuit of a household appliance in the related art
  • FIG. 5 is another schematic flowchart of the control method of the household appliance according to the embodiment of the present disclosure.
  • FIG. 6 is another schematic flowchart of the control method of the household appliance according to the embodiment of the present disclosure.
  • FIG. 7 is another flowchart of the control method of the household appliance according to the embodiment of the present disclosure.
  • Fig. 8 is a schematic circuit diagram of a household appliance according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of another circuit of the household appliance according to the embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of another module of the household appliance according to the embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of another module of the household appliance according to the embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram of the principle of the power supply circuit of the household appliance according to the embodiment of the present disclosure in operation;
  • FIG. 13 is another schematic diagram of the principle of the power supply circuit of the household appliance according to the embodiment of the present disclosure during operation;
  • FIG. 14 is a schematic diagram of waveforms of a power supply circuit of a household appliance according to an embodiment of the present disclosure.
  • Power supply circuit 102 load 104, impedance element 106, control device 108, switch 110, energy storage circuit 112, power supply circuit 114, switch circuit 116, impedance element 200, control chip 124, first control terminal 125, and second control terminal 126, control terminal 128, power supply 400, first reactor L1, second reactor L2, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, diode D7, diode D8, magnetic latching relay RY1, Switch transistor Q1.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of the features.
  • “plurality” means two or more, unless otherwise specifically defined.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • they can be fixed connection or It is a detachable connection or an integral connection; it can be a mechanical connection, or it can be an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components or two components The interaction relationship.
  • connection should be understood according to specific situations.
  • the "on" or “under” of the first feature of the second feature may include direct contact between the first and second features, or include the first and The second feature is not in direct contact but through another feature between them.
  • an embodiment of the present disclosure provides a control method of a household appliance 100.
  • the home appliance 100 includes a power supply circuit 102 and a load 104.
  • the power supply circuit 102 is connected to the load 104 and supplies power to the load 104.
  • control method of the household appliance 100 includes:
  • Step S1 obtaining the operating frequency of the load 104 and the impedance of the power supply circuit 102 connected to it;
  • Step S2 when the operating frequency is less than the first preset frequency and the impedance of the power supply circuit 102 is greater than the preset impedance, the impedance of the power supply circuit 102 is reduced.
  • the control method of the household appliance 100 of the embodiment of the present disclosure may be implemented by the household appliance 100 of the embodiment.
  • the household appliance 100 includes a control device 108, a power supply circuit 102, and a load 104.
  • the control device 108 is connected to the power supply circuit 102 and the load 104.
  • the power supply circuit 102 is used to supply power to the load 104, and the control device 108 is used to obtain the load.
  • the operating frequency of 104 and the impedance of the power supply circuit 102 are used to reduce the impedance of the power supply circuit 102 when the operating frequency is less than the first preset frequency and the impedance of the power supply circuit 102 is greater than the preset impedance.
  • the access can be reduced.
  • the impedance of the power supply circuit 102 reduces the power consumed on the impedance element 106. On the one hand, it can reduce the overall power consumption of the household appliance 100, and on the other hand, it will not affect the normal operation of the household appliance 100.
  • step S2 includes:
  • Step S20 judging whether the operating frequency is less than the first preset frequency
  • Step S30 in the case that the operating frequency is less than the first preset frequency, determine whether the impedance of the power supply circuit 102 is greater than the preset impedance;
  • Step S40 when the impedance of the power supply circuit 102 is greater than the preset impedance, the impedance of the power supply circuit 102 is reduced.
  • the control method of the household appliance 100 of the embodiment of the present disclosure may be implemented by the household appliance 100 of the embodiment.
  • the control device 108 is used to obtain the operating frequency of the load 104, to determine whether the operating frequency is less than the first preset frequency, and to, when the operating frequency is less than the first preset frequency, It is determined whether the impedance of the access power supply circuit 102 is greater than the preset impedance, and is used to reduce the impedance of the access power supply circuit 102 when the impedance of the access power supply circuit 102 is greater than the preset impedance.
  • the relationship between the impedance of the power supply circuit 102 and the preset impedance may be determined first, and then the relationship between the operating frequency and the first preset frequency may be determined, or the impedance of the power supply circuit 102 may be determined at the same time.
  • the relationship with the preset impedance, and the relationship between the operating frequency and the first preset frequency There is no specific limitation here.
  • the order of collecting the operating frequency of the load 104 and the impedance of the power supply circuit 102 is not specifically limited.
  • the operating frequency of the load 104 may be collected first, and then the relationship between the operating frequency of the load 104 and the first preset frequency may be determined, and then the impedance of the power supply circuit 102 may be collected, and then the power supply may be determined.
  • the relationship between the impedance of the circuit 102 and the preset impedance, etc. are all within the protection scope of the present disclosure.
  • the household appliance 100 includes but is not limited to air conditioners, refrigerators, washing appliances, microwave cooking equipment, etc.
  • the load 104 includes, but is not limited to, compressors, pumps, frequency converters, magnetrons, and the like.
  • the control device 108 can control the load 104 to operate at different frequencies.
  • the household appliance 100 is an inverter air conditioner, and the load 104 is a compressor. This embodiment is only described in detail. The present disclosure includes but is not limited to only applying this embodiment.
  • a passive PFC circuit a larger impedance element 200 (inductance or reactor) is generally connected to provide the required harmonics in the circuit.
  • the control method of the embodiment of the present disclosure can be applied to passive PFC circuits and active PFC circuits.
  • the power consumed by the impedance element 106 is proportional to the square of the current flowing through the impedance element 106, and also proportional to the resistance of the impedance element 106.
  • the greater the resistance the greater the power consumed by the impedance element 106.
  • the overall power consumption of the whole machine can be reduced by reducing the impedance of the access power supply circuit 102.
  • the operating frequency of the load 104 is controlled by the control device 108 according to the operating conditions of the household appliance 100.
  • the working conditions of the air conditioner include various operating modes, including but not limited to cooling mode, heating mode, dehumidification mode, ventilation mode, energy saving mode, sleep mode, etc.
  • the selection of the operating mode may be an automatic selection of the air conditioner, or may be selected according to an input instruction of the user, which is not specifically limited here.
  • step S1 the operating frequency of the load 104 is acquired.
  • the operating frequency of the compressor is acquired.
  • the compressor when the compressor is running at a higher frequency, the power of the whole household appliance 100 is larger, and the power drop caused by reducing the impedance of the power supply circuit 102 is small for the whole machine (basically can be ignored Excluding), it is of little significance to improve the energy efficiency ratio of the whole machine.
  • the current in the high frequency stage is large, and reducing the impedance may have a great impact on the harmonics and power factor. Therefore, when the operating frequency of the load is less than the first preset frequency and the impedance of the power supply circuit is greater than the preset impedance, the impedance of the power supply circuit 102 is reduced. In this way, the way to reduce power consumption is to use it when the compressor is running at low frequency, so that it has little effect on harmonics and power factor.
  • the preset impedance is R0
  • the impedance set when the load is running at lower frequency is R1
  • the impedance set when the load is running at higher frequency is R2
  • the current impedance connected to the power supply circuit 102 is RT, where R2> R1.
  • the lower frequency or low frequency may be a frequency less than the first preset frequency
  • the higher frequency or high frequency may be a frequency not less than the first preset frequency.
  • the load generally runs at a higher operating frequency.
  • the impedance of the access power supply circuit 102 is also relatively large to ensure that the requirements of harmonics and power factor are met.
  • the load 104 may run at a low frequency to reduce power consumption. Therefore, when the operating frequency of the load is less than the first preset frequency, the impedance of the power supply circuit 102 is reduced to reduce power consumption, and at the same time, the influence on harmonics and power factor is also within an acceptable range.
  • control method includes:
  • Step S3 when the operating frequency is less than the first preset frequency and the impedance of the power supply circuit 102 is not greater than the preset impedance, the impedance of the power supply circuit 102 is kept unchanged.
  • step S3 can be implemented by the household appliance 100 of the embodiment of the present disclosure, that is, the control device 108 is configured to operate when the operating frequency is less than the first preset frequency and the impedance connected to the power supply circuit 102 is not greater than the preset impedance In the case of, keep the impedance of the power supply circuit 102 connected to it.
  • control method includes:
  • Step S4 when the operating frequency is greater than the second preset frequency and the impedance of the power supply circuit 102 is greater than the preset impedance, the impedance of the power supply circuit 102 is kept unchanged.
  • Step S5 when the operating frequency is greater than the second preset frequency and the impedance of the power supply circuit 102 is not greater than the preset impedance, the impedance of the power supply circuit 102 is increased.
  • the second preset frequency is greater than the first preset frequency
  • the above-mentioned steps can be implemented by the household appliance 100 of the embodiment of the present disclosure, that is, the control device 108 is used in the case where the operating frequency is greater than the second preset frequency and the impedance connected to the power supply circuit 102 is greater than the preset impedance , Keeping the impedance of the power supply circuit 102 connected, and used to increase the impedance of the power supply circuit 102 when the operating frequency is greater than the second preset frequency and the impedance of the power supply circuit 102 is not greater than the preset impedance .
  • the power supply circuit 102 can be operated with a relatively high impedance to meet the circuit characteristic requirements of the household appliance 100, such as the requirements of harmonics and power factor.
  • the load 104 may operate at a higher frequency again.
  • the power supply circuit 102 needs to operate with a larger impedance.
  • the impedance of the power supply circuit 102 is kept unchanged, and when the operating frequency is greater than the second preset frequency and the impedance If the impedance of the power supply circuit 102 is not greater than the preset impedance, the impedance of the power supply circuit 102 is increased. Specifically, the impedance of the power supply circuit 102 can be increased by increasing the impedance of the impedance element 106 connected to the power supply circuit 102.
  • control method includes:
  • Step S6 When the operating frequency is not less than the first preset frequency and not greater than the second preset frequency, the impedance of the power supply circuit 102 is kept unchanged.
  • the above steps can be implemented by the household appliance 100 of the embodiment of the present disclosure, that is, the control device 108 is used to maintain the connection when the operating frequency is not less than the first preset frequency and not greater than the second preset frequency.
  • the impedance of the input power supply circuit 102 remains unchanged.
  • the operating frequency of the load 104 may fluctuate. If it is detected that the operating frequency of the load 104 is not less than the first preset frequency and not greater than the second preset frequency, the impedance connected to the power supply circuit 102 is kept unchanged, which can avoid the impedance fluctuation caused by the fluctuation of the operating frequency of the load 104 Switch frequently.
  • the impedance connected to the power supply circuit 102 is larger as R2.
  • the impedance connected to the power supply circuit 102 is reduced, and the reduced impedance is R1. In the case that the detected operating frequency is not less than the first preset frequency and not greater than the second preset frequency, the impedance of the power supply circuit 102 connected to it is maintained at R1.
  • the operating frequency of the load 104 if the operating frequency of the load 104 is less than the first preset frequency, it means that the load 104 is operating in the low frequency stage. If the operating frequency of the load 104 is greater than the second preset frequency, it means that the load 104 is operating in the high frequency stage.
  • the selectable range of the first preset frequency is [29 Hz, 31 Hz)
  • the selectable range of the second preset frequency is [31 Hz, 33 Hz].
  • the first preset frequency is 30 Hz
  • the second preset frequency is 32 Hz.
  • the power supply circuit 102 includes a plurality of impedance elements 106 connected in series, and step S40 includes: short-circuiting one of the plurality of impedance elements 106 when the impedance of the power supply circuit 102 is greater than the preset impedance Or several to reduce the impedance of the access power supply circuit 102.
  • control device 108 is used to short-circuit one or more of the multiple impedance elements 106 when the impedance of the power supply circuit 102 is greater than the preset impedance. This can reduce the impedance of the power supply circuit 102.
  • the total impedance is equal to the impedance R2 required by the load in the high-frequency operation stage.
  • the impedance of each impedance element 106 can be the same or different.
  • the impedance element 200 with a larger impedance (for example, its impedance is R2) is split into two impedance elements 106 with smaller impedance, and the impedance of each impedance element 106 is equal to the impedance element 200 Half of the impedance of, that is, the impedance of each impedance element 106 is R2/2. Since there is no change in the total impedance, when the two impedance elements 106 are connected to the power supply circuit 102, the total power consumed is the sum of the respective powers of the two impedance elements 106, which is the same as the power consumed by the impedance element 200 .
  • impedance can be understood as resistance
  • the magnitude of impedance can be understood as resistance value
  • the impedance element 106 includes, but is not limited to, reactors, resistors, inductors, and other impedance elements 106 that can generate impedance in a circuit.
  • At least one or more of the multiple impedance elements 106 are connected in parallel with the switch 110, and short-circuit one or more of the multiple impedance elements 106, including: controlling the switch 110 to close to short-circuit the multiple impedance elements 106 One or several of them. In this way, short-circuiting the impedance element 106 through the switch 110 is simple, easy to control, and low in cost.
  • the number of impedance elements 106 is two, one impedance element 106 is connected in parallel with the switching element 110, and the other impedance element 106 does not have the switching element 110 in parallel.
  • the switching element 110 is controlled. 110 is closed to short-circuit one of the impedance elements 106.
  • each of the two impedance elements 106 can be connected in parallel with a switch 110.
  • one of the switch 110 can be controlled to be closed and short. Connect one of the impedance elements 106.
  • the number of impedance elements 106 is greater than two, it may be that one impedance element 106 is connected in parallel with the switching element 110, and the other impedance elements 106 are not connected in parallel with the switching element 110, or each impedance element 106 is connected in parallel.
  • the switching element 110 may also be that two of the impedance elements 106 connected in series are connected in parallel with one switching element 110, and the other impedance elements 106 are not connected in parallel with the switching element 110.
  • the household appliance 100 is an air conditioner, and the circuits shown in FIGS. 8 and 9 can be applied to the outdoor unit rectifier circuit of the air conditioner.
  • the rectifier circuit includes a rectifier bridge composed of four diodes D1, D2, D3 and D4.
  • the control device 108 includes a control chip 124 and a switch circuit 116.
  • the control chip 124 is connected to the switch circuit 116 and the power supply circuit 102.
  • the control chip 124 outputs a control signal to enable the switch circuit 116 to control the operation of the switch 110 status.
  • the working state includes closed and open.
  • the control chip 124 may be an MCU (Micro Control Unit, microcontroller).
  • the switching element 110 includes a relay.
  • the relay is a normally open relay. When the coil of the normally open relay is not energized, the two contacts are disconnected, and after power is applied, the two contacts are closed. Therefore, when the impedance element 106 needs to be short-circuited, the control chip 124 outputs a control signal to make the switch circuit 116 continue to supply power to the relay to short-circuit the impedance element 106.
  • the relay may be a normally closed relay. When the coil of the normally closed relay is not energized, the two contacts are closed, and the two contacts are disconnected after being energized. Therefore, when the impedance element 106 needs not to be short-circuited, the control chip 124 outputs a control signal to make the switch circuit 116 continue to supply power to the relay so that the impedance element 106 is not short-circuited.
  • control chip 124 is connected to the control terminal 128 of the switch circuit 116 for the main chip control signal, and the control chip 124 inputs the control signal to the switch circuit 116 through the control terminal of the switch circuit 116, so that the switch circuit 116 can control the switching device. 110 working status.
  • the switch The element 110 may be a holding switch element.
  • the control method includes: controlling the working state of the switching element by controlling the levels of the first control signal and the second control signal input to the switching circuit.
  • the holding type switching device is a magnetic holding relay RY1.
  • the normally open or normally closed state of the magnetic latching relay RY1 relies on the action of a permanent magnet, and the conversion of its working state is triggered by a pulse signal of a certain width.
  • the coil does not need to be continuously energized, and the state of the relay can be maintained unchanged by the magnetic force of the permanent magnet.
  • the use of the magnetic latching relay RY1 as the switch element 110 can prevent the switch element 110 from consuming more power, so as to further reduce the power consumption of the whole household appliance 100.
  • the switching element 110 can also select other elements with switching functions, and is not limited to the relay discussed above.
  • control method includes: outputting a high-level first control signal for a preset period of time and continuously outputting a low-level second control signal to close the switch 110;
  • the first control signal with a low level and the second control signal with a high level are continuously output for a preset period of time, so that the switch element 110 is turned off.
  • control device 108 that is, the control device 108 is used to control the output of the first control signal of high level for a preset period of time and continuously output the second control signal of low level to close the switch 110, and The first control signal for continuously outputting the low level and the second control signal for outputting the high level continue for a preset period of time, so that the switch 116 is turned off. In this way, the state switching of the holding switch element is realized.
  • the initial working state of the magnetic latching relay RY1 is off, and the control chip 124 outputs a high-level first control signal for a preset period of time until the first control terminal 125 of the switch circuit 116 chip control signal 2 , Continue to output the low-level second control signal to the second control terminal 126 of the switch circuit chip control signal 1 to close the magnetic latching relay RY1.
  • the control chip 124 controls the first control signal with a low level to be output continuously.
  • the control chip 124 continuously outputs the first control signal of low level to the first control terminal 125 of the switch circuit 116 and the chip control signal 2 and outputs the second control signal of high level for a preset period of time to the second control terminal of the switch circuit 116
  • the 126 chip controls signal 1 to turn off the magnetic latching relay RY1. After the high-level second control signal is output for a preset period of time, the control chip 124 controls the low-level second control signal to be output continuously.
  • the preset duration can be 1 second, 10 seconds, or any value between the two.
  • the high level and the low level refer to the electrical characteristics of the control signal that can trigger the action of the switch 110, such as voltage or current.
  • the specific voltage or current is set according to the specific situation.
  • the high level is usually set to 1, and the low level is set to 0.
  • the first control signal output 1 (representing the first control signal of high level) for 1 second and then continuously output 0 to the first control terminal 125 of the switch circuit 116.
  • the chip control signal 2 is When the second control signal always outputs 0 (the second control signal representing the low level) to the second control terminal 126 of the switch circuit 116, the chip control signal 1, the magnetic latching relay RY1 is closed. If the first control signal always outputs 0 and the second control signal outputs 1 for 1 second and then continues to output 0, the magnetic latching relay RY1 is turned off.
  • the power supply circuit 102 includes a power supply circuit 114 and an energy storage circuit 112.
  • the control method includes: controlling the power supply circuit 114 to store energy for the impedance element 106 through the energy storage circuit 112; controlling the power supply circuit 114 and The impedance element 106 after energy storage supplies power to the load 104.
  • the control device 108 is used to control the power supply circuit 114 to store energy for the impedance element 106 through the energy storage circuit 112; and to control the power supply circuit 114 and the stored energy
  • the impedance element 106 supplies power to the load 104. In this way, the power supply circuit 102 can be boosted to meet the operating conditions of the load 104.
  • the energy storage circuit 112 includes a switching transistor Q1 and four diodes D5, D6, D7, and D8.
  • the base of the switching transistor Q1 is connected to the control chip 124, and the control chip 124 controls the switching transistor Q1. Turn on and off.
  • the switching transistor Q1 may include an IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor). It should be pointed out that the component models and values shown in FIG. 8 and FIG. 9 are merely illustrative and do not limit the protection scope of the present disclosure.
  • the control power supply circuit 114 stores energy for the impedance element 106 through the tank circuit 112, including: turning on the switching transistor Q1 of the tank circuit 112 so that the power supply circuit 114 stores energy for the impedance element 106 through the tank circuit 112.
  • Controlling the power supply circuit 114 and the stored energy impedance element 106 to supply power to the load 104 includes: turning off the switching transistor Q1 of the energy storage circuit 112 so that the power supply circuit 114 and the energy stored impedance element 106 supply power to the load 104.
  • the control device 108 is used to turn on the switching transistor Q1 of the tank circuit 112 so that the power supply circuit 114 stores energy as the impedance element 106 through the tank circuit 112, and The switching transistor Q1 of the energy storage circuit 112 is turned off so that the power supply circuit 114 and the impedance element 106 after energy storage can supply power to the load 104.
  • the impedance element 106 can store energy and release energy by turning on and off the switching transistor Q1.
  • the control method is simple and the cost is low.
  • the power supply 400 stores energy for the impedance element 106 through the tank circuit 112.
  • the switching transistor Q1 of the tank circuit 112 is turned off, the energy stored in the impedance element 106 is released, which causes the voltage across the load to increase.
  • the dashed arrow indicates the direction of current.
  • the power source 400 may be an AC power source (for example, a two-phase AC power source), and the control signal for controlling the switching transistor Q1 may be a pulse signal.
  • the pulse signal may be a PFC control signal output by the control chip 124.
  • the control chip 124 After each AC voltage zero crossing signal, the control chip 124 outputs a pulse signal, which is boosted by the PFC circuit composed of the tank circuit 112 and the impedance element 106. 14 shows the correspondence between the waveform of the AC voltage, the signal waveform of the output pin of the control chip 124, and the control signal waveform of the base of the switching transistor Q1.
  • a "computer-readable medium” can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, device, or device or in combination with these instruction execution systems, devices, or devices.
  • computer readable media include the following: electrical connections (electronic devices) with one or more wiring, portable computer disk cases (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable and editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM).
  • the computer-readable medium may even be paper or other suitable medium on which the program can be printed, because it can be done, for example, by optically scanning the paper or other medium, and then editing, interpreting or other suitable methods when necessary. Process to obtain the program electronically and then store it in computer memory.
  • each part of the embodiments of the present disclosure can be implemented by hardware, software, firmware, or a combination thereof.
  • multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system.
  • a logic gate circuit for implementing logic functions on data signals
  • Discrete logic circuits Discrete logic circuits
  • application-specific integrated circuits with suitable combinational logic gates
  • FPGA field programmable gate array
  • the functional units in the various embodiments of the present disclosure may be integrated into one processing module, or each unit may exist alone physically, or two or more units may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer readable storage medium.
  • the aforementioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

L'invention concerne un procédé de commande d'appareil électroménager (100) et un appareil électroménager (100). Le procédé de commande consiste : à obtenir une fréquence de fonctionnement d'une charge (104) d'un appareil électroménager (100) et une impédance d'un circuit d'alimentation électrique (102) connecté à l'appareil électroménager (100) pour fournir de l'énergie à la charge (104) (S1) ; et si la fréquence de fonctionnement est inférieure à une première fréquence prédéfinie et que l'impédance du circuit d'alimentation électrique connecté (102) est supérieure à une impédance prédéfinie, à réduire l'impédance du circuit d'alimentation électrique connecté (102). Dans le cas où la fréquence de fonctionnement de la charge (104) de l'appareil électroménager (100) est inférieure à la première fréquence prédéfinie et l'impédance du circuit d'alimentation électrique connecté (102) est supérieure à l'impédance prédéfinie, le procédé de commande peut réduire l'impédance du circuit d'alimentation électrique connecté (102), de manière à réduire la puissance consommée sur un élément d'impédance (106). D'une part, la consommation d'énergie globale de l'appareil électroménager (100) peut être réduite, et d'autre part, le fonctionnement normal de l'appareil électroménager (100) ne sera pas affecté.
PCT/CN2019/112326 2019-03-11 2019-10-21 Procédé de commande d'appareil électroménager et appareil électroménager WO2020181770A1 (fr)

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CN110021937B (zh) * 2019-03-11 2020-09-25 广东美的制冷设备有限公司 家用电器的控制方法及家用电器

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CN201860283U (zh) * 2010-11-03 2011-06-08 武汉理工大学 基于可变电抗器的分级变频重载软起动装置
CN104134981A (zh) * 2014-07-02 2014-11-05 邯郸美的制冷设备有限公司 用于空调器的过电压保护装置、过电压保护方法及空调器
US20140376284A1 (en) * 2013-06-21 2014-12-25 Hamilton Sundstrand Corporation Systems and methods for tuning the control of a shunt active power filter over a variable frequency
CN104882887A (zh) * 2015-05-28 2015-09-02 株洲变流技术国家工程研究中心有限公司 一种变频调速装置的输出滤波器及控制方法
CN110021937A (zh) * 2019-03-11 2019-07-16 广东美的制冷设备有限公司 家用电器的控制方法及家用电器

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CN101789685A (zh) * 2010-03-04 2010-07-28 广东美的电器股份有限公司 一种部分pfc装置及其控制方法
CN101807799A (zh) * 2010-04-27 2010-08-18 天津大学 超级电容储能型电能质量补偿器
CN201860283U (zh) * 2010-11-03 2011-06-08 武汉理工大学 基于可变电抗器的分级变频重载软起动装置
US20140376284A1 (en) * 2013-06-21 2014-12-25 Hamilton Sundstrand Corporation Systems and methods for tuning the control of a shunt active power filter over a variable frequency
CN104134981A (zh) * 2014-07-02 2014-11-05 邯郸美的制冷设备有限公司 用于空调器的过电压保护装置、过电压保护方法及空调器
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