CN111404383B - Power supply control device, air conditioner and power supply control method of air conditioner - Google Patents

Power supply control device, air conditioner and power supply control method of air conditioner Download PDF

Info

Publication number
CN111404383B
CN111404383B CN202010158885.3A CN202010158885A CN111404383B CN 111404383 B CN111404383 B CN 111404383B CN 202010158885 A CN202010158885 A CN 202010158885A CN 111404383 B CN111404383 B CN 111404383B
Authority
CN
China
Prior art keywords
power supply
switching
current
signal
state
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN202010158885.3A
Other languages
Chinese (zh)
Other versions
CN111404383A (en
Inventor
刘晨瑞
金国华
李忠正
唐玉龙
蓝振进
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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 Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202010158885.3A priority Critical patent/CN111404383B/en
Publication of CN111404383A publication Critical patent/CN111404383A/en
Application granted granted Critical
Publication of CN111404383B publication Critical patent/CN111404383B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • 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
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a power supply control device, an air conditioner and a power supply control method thereof, wherein the device comprises: the control unit, the switch unit and the switch power supply; the control unit is used for determining the current state of the electric appliance and determining the current power supply signal of the electric appliance according to the current state of the electric appliance; the switch unit is used for switching on a control branch of a current power supply signal according to the current power supply signal of the electric appliance; and the switching power supply is used for adjusting the current switching frequency according to the signal for controlling the branch circuit to be switched on of the current power supply signal. The scheme of the invention can solve the problem of large power consumption of the air conditioner and achieve the effect of reducing the power consumption of the air conditioner.

Description

Power supply control device, air conditioner and power supply control method of air conditioner
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a power supply control device, an air conditioner and a power supply control method thereof, in particular to a load-adaptive low-power-consumption control circuit, an air conditioner and a load-adaptive low-power-consumption control method thereof.
Background
Along with the development of the society, the selection of the public on the air conditioner is more specialized, and the selection of the public on the air conditioner not only stays in the field of the cooling and heating effect of the air conditioner, but also gradually considers the power consumption problem of various high-power electrical appliances such as the air conditioner and the like. However, the air conditioner has certain power consumption problem in the operation stage no matter light load or heavy load; in addition, the switching power supply is designed such that switching loss is inevitably generated due to switching of the switching power supply.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The present invention is directed to provide a power supply control device, an air conditioner and a power supply control method thereof, so as to solve the problem of large power consumption of the air conditioner and achieve the effect of reducing the power consumption of the air conditioner.
The present invention provides a power supply control device, including: the control unit, the switch unit and the switch power supply; the control unit is used for determining the current state of the electric appliance and determining the current power supply signal of the electric appliance according to the current state of the electric appliance; the switch unit is used for switching on a control branch of a current power supply signal according to the current power supply signal of the electric appliance; and the switching power supply is used for adjusting the current switching frequency according to the signal for controlling the branch circuit to be switched on of the current power supply signal.
Optionally, the method further comprises: an isolation unit; and the isolation unit is used for carrying out photoelectric isolation on the signal for controlling the switching-on of the branch of the current power supply signal and then transmitting the signal to the control end of the switching power supply.
Optionally, wherein the current state includes: a standby state and an operating state; an operational state comprising: the load power consumption of the first load state is less than that of the second load state; a current power supply signal comprising: any one of the first power signal, the second power signal, and the third power signal; the control unit determines the current power supply signal of the electric appliance according to the current state of the electric appliance, and the method comprises the following steps: if the current state is the standby state, the current power supply signal is a first power supply signal; if the current state is the first load state, the current power supply signal is the second power supply signal; and if the current state is the second load state, the current power supply signal is a third power supply signal.
Optionally, a switching unit comprising: a first switch module, a second switch module and a third switch module; the switching power supply adjusts the current switching frequency according to the signal of the control branch circuit of the current power supply signal, including: if the current state is the standby state, the frequency end of the switching power supply is connected with the source electrode of the switching power supply through the control end of the switching power supply so as to adjust the switching frequency of the switching power supply to the set lowest frequency; if the current state is the first load state, the control end of the switching power supply is connected with the frequency end of the switching unit, and the current frequency of the switching power supply is adjusted to be within a first switching frequency threshold range matched with the second power supply signal; and if the current state is the second load state, switching on the control end of the switching power supply and the frequency end of the switching unit, and adjusting the current frequency of the switching power supply to be within a second switching frequency threshold range matched with the third power supply signal.
Optionally, wherein the first switch module comprises: the device comprises a first switch tube, a first starting module, a first current dividing module and a first voltage dividing module; the first power supply signal is connected to the base electrode of the first switching tube through the first starting module, and the collector electrode of the first switching tube is connected to the direct-current power supply after passing through the first voltage division module and the second voltage division module respectively; a second switch module comprising: the second switch tube, the second starting module, the second shunt module and the third shunt module; a second power supply signal is connected to a base electrode of a second switching tube through a second starting module, and a collector electrode of the second switching tube is connected to a common end of the first voltage division module and the first voltage division module through a second shunt module and a third shunt module which are connected in parallel; a third switch module comprising: the third switching tube, the third starting module, the fourth shunting module and the fifth shunting module; and a collector of the third switching tube is connected to a common end of the first voltage division module and the first voltage division module after passing through the fourth voltage division module and the fifth voltage division module which are connected in parallel.
In accordance with another aspect of the present invention, there is provided an air conditioner including: the above-described power supply control device.
In another aspect, the present invention provides a power supply control method for an air conditioner, including: determining the current state of the electric appliance through the control unit, and determining the current power supply signal of the electric appliance according to the current state of the electric appliance; switching on a control branch of a current power supply signal according to the current power supply signal of the electric appliance through a switch unit; and regulating the current switching frequency according to the signal for controlling the branch circuit to be switched on of the current power supply signal through the switching power supply.
Optionally, the method further comprises: and after the signal of the control branch of the current power supply signal is subjected to photoelectric isolation through the isolation unit, the signal is transmitted to the control end of the switching power supply.
Optionally, wherein the current state includes: a standby state and an operating state; an operational state comprising: the load power consumption of the first load state is less than that of the second load state;
a current power supply signal comprising: any one of the first power signal, the second power signal, and the third power signal; determining a current power signal of the electrical appliance according to a current state of the electrical appliance through the control unit, including: if the current state is the standby state, the current power supply signal is a first power supply signal; if the current state is the first load state, the current power supply signal is the second power supply signal; and if the current state is the second load state, the current power supply signal is a third power supply signal.
Optionally, adjusting the current switching frequency according to a signal that controls the branch of the current power signal by the switching power supply includes: if the current state is the standby state, the frequency end of the switching power supply is connected with the source electrode of the switching power supply through the control end of the switching power supply so as to adjust the switching frequency of the switching power supply to the set lowest frequency; if the current state is the first load state, the control end of the switching power supply is connected with the frequency end of the switching unit, and the current frequency of the switching power supply is adjusted to be within a first switching frequency threshold range matched with the second power supply signal; and if the current state is the second load state, switching on the control end of the switching power supply and the frequency end of the switching unit, and adjusting the current frequency of the switching power supply to be within a second switching frequency threshold range matched with the third power supply signal.
According to the scheme of the invention, the low-power consumption control of the air conditioner is realized by adjusting the switching frequency of the air conditioner under different load states, so that the serious power consumption loss of the air conditioner in a standby state can be avoided, and the electric energy is saved.
Furthermore, according to the scheme of the invention, the switching frequency of the air conditioner is adjusted under different load states through the low-power-consumption control circuit which is self-adaptive along with the load, so that the low-power-consumption operation of the air conditioner is met.
Furthermore, according to the scheme of the invention, after the air conditioner enters the running working state, the switching frequency is selected by detecting the size of the load, so that the switching power supply can work in the most appropriate and effective frequency range, and the low power consumption is self-adaptive along with the load.
Therefore, according to the scheme of the invention, after the air conditioner enters the operation working state, the switching frequency is selected by detecting the size of the load, so that the switching power supply which continuously changes along with the load is realized, the problem of large power consumption of the air conditioner is solved, and the effect of reducing the power consumption of the air conditioner is achieved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of a power supply control device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of a power low-power control circuit in an air conditioner according to the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of a main chip in an air conditioner according to the present invention;
fig. 4 is a flowchart illustrating a power supply control method according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the present invention, there is provided a power supply control device. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The power supply control device may include: control unit, switching unit and switching power supply.
Specifically, the control unit may be configured to determine a current state of the electrical appliance, determine a current power signal of the electrical appliance according to the current state of the electrical appliance, and transmit the current power signal of the electrical appliance.
The current state may include: standby state and running state. The operation state can comprise: the load power consumption of the first load state is smaller than that of the second load state. The current power supply signal may include: any one of the first power signal, the second power signal, and the third power signal.
Optionally, the determining, by the control unit, the current power signal of the electrical appliance according to the current state of the electrical appliance may include: if the current state is the standby state, the current power supply signal is a first power supply signal; if the current state is the first load state, the current power supply signal is the second power supply signal; and if the current state is the second load state, the current power supply signal is a third power supply signal.
Therefore, different power supply signals are provided for different states of the electric appliance, different switching frequencies are conveniently provided for different states of the electric appliance, and loss is reduced.
Specifically, the switch unit may be configured to turn on a control branch of the current power signal according to the current power signal of the electrical appliance, and obtain a turn-on signal for turning on the control branch of the current power signal.
Specifically, the switching power supply may be configured to adjust a current switching frequency according to a signal that a control branch of a current power supply signal is turned on, so that the current switching frequency of the switching power supply matches with a current state of the electrical appliance.
For example: a load-adaptive low-power-consumption control circuit can solve the problem of high power consumption loss in the standby state and the operation stage of an air conditioner, meet the low-power-consumption operation of the air conditioner, achieve true low power consumption and save electric energy. If the air conditioner enters the operation working state, the MCU main chip detects the size of the load to select the switching frequency, so that the switching power supply which continuously changes along with the load is achieved, and unnecessary switching consumption is reduced.
For example: can realize that the air conditioner adjusts switching frequency under different load states through control circuits such as MCU, opto-coupler detection, triode control and reach the low-power consumption control of air conditioner, can avoid air conditioner standby state power consumption serious, practice thrift the electric energy. Specifically, according to the characteristics of the switching power supply, the load state of the air conditioner can be detected by using the MCU main chip, different state signals of the air conditioner are fed back to the corresponding LOWPOWER1, LOWPOWER2 and LOWPOWER3 when the air conditioner is in the load state, the MCU controls the optical coupling circuit and feeds back to the switching power supply to select corresponding switching frequency, so that the switching frequency in the same time is reduced, and the problem that the switching loss is serious when the frequency is unchanged and only the duty ratio is adjusted under different states of the air conditioner is solved.
Therefore, the switching frequency of the switching power supply of the electric appliance is adjusted according to different states of the electric appliance, and the phenomenon that the switching power supply is frequently started to increase energy consumption is avoided.
Wherein, the switch unit can include: the first switch module, the second switch module and the third switch module.
Optionally, the switching power supply adjusts the current switching frequency according to a signal that the control branch of the current power supply signal is turned on, and may include any one of the following adjustment situations.
The first regulation case: if the current state is the standby state, the frequency end of the switching power supply is connected with the source electrode of the switching power supply through the control end of the switching power supply so as to adjust the switching frequency of the switching power supply to the set lowest frequency.
For example: when the air conditioning system is powered on, the air conditioning system is in a standby state; feeding back a signal of a first power supply LOWPOWER1 to a first triode Q1 through MCU internal logic, controlling the conduction of a first triode Q1, feeding back the signal to a switching power supply chip U1 through an optocoupler detection circuit U2, and switching on a frequency pin F of a switching power supply chip U1 and a source S of the switching power supply chip U1 through a control pin C of the switching power supply chip U1 so as to adjust the switching frequency to the lowest state; further, when the frequency pin F of the switching power supply chip U1 is connected to the source S of the switching power supply chip U1, the switching power supply chip operates at the lowest switching frequency, so that the switching loss is reduced.
The second regulation case: if the current state is the first load state, the control end of the switching power supply is connected with the frequency end of the switching unit, and the current frequency of the switching power supply is adjusted to be within a first switching frequency threshold range matched with the second power supply signal.
For example: when the air conditioning system receives an external starting instruction, the MCU executes a load output command at the moment, and the running state is realized at the moment. In the operating state, when the air conditioner executes control, the power changes along with the load change at the rear end, when the MCU internal logic detects that the power is in the threshold range of the second power supply LOWPOWER2, the signal of the second power supply LOWPOWER2 is fed back to the second triode Q2, the conduction of the second triode Q2 is controlled, the signal is fed back to the switching power supply chip U1 through the optical coupling detection circuit U2, the control pin C of the switching power supply chip U1 is connected with the frequency pin F of the switching power supply chip U1 through the control pin C of the switching power supply chip U1, the switching frequency is adjusted to the corresponding threshold state, and therefore the high-efficiency output of the high-frequency band of the switching power supply is met.
The third regulation case: and if the current state is the second load state, switching on the control end of the switching power supply and the frequency end of the switching unit, and adjusting the current frequency of the switching power supply to be within a second switching frequency threshold range matched with the third power supply signal.
For example: when the air conditioning system receives an external starting instruction, the MCU executes a load output command at the moment, and the running state is realized at the moment. In the operating state, when the air conditioner load is heavy load, and in the same way, when the power is detected to be within the threshold range of the third power supply LOWPOWER3, a signal of the third power supply LOWPOWER3 is fed back to the third triode Q3, the conduction of the third triode Q3 is controlled, the signal is fed back to the switching power supply chip U1 through the optical coupling detection circuit U2, the control pin C of the switching power supply chip U1 is connected with the frequency pin F of the switching power supply chip U1 through the control pin C of the switching power supply chip U1, the switching frequency is adjusted to the threshold state, and therefore the high-efficiency output of the switching power supply in the high frequency range is met.
Therefore, by arranging the plurality of control branches, the switching frequency of the switching power supply is controlled by different control branches according to different states of the electric appliance, the switching frequency can be adjusted according to the adaptability of the electric appliance to different states, and the phenomenon that the energy consumption is increased due to frequent switching of the switching power supply is avoided.
More optionally, a more specific structure of the switch unit can be seen in the following exemplary description.
Specifically, the first switch module may include: the device comprises a first switch tube, a first starting module, a first current dividing module and a first voltage dividing module. The first power supply signal is connected to the base electrode of the first switch tube through the first starting module, the collector electrode of the first switch tube is connected to the direct-current power supply after passing through the first voltage division module and the second voltage division module respectively, and the emitting electrode of the first switch tube is grounded. For example: a first switch, such as a first transistor Q1. The first enabling module may be a base resistor R1. The first shunting module may be a resistor R8. The first voltage dividing module may be a resistor R9.
Specifically, the second switch module may include: the second switch tube, the second starting module, the second shunt module and the third shunt module. The second power supply signal is connected to the base electrode of the second switch tube through the second starting module, the collector electrode of the second switch tube is connected to the common end of the first voltage division module and the first voltage division module through the second voltage division module and the third voltage division module which are connected in parallel, and the emitting electrode of the second switch tube is grounded. For example: and a second switching tube, such as a second transistor Q2. A second enabling module, such as a base resistor R2. A second shunt module, such as resistor R6. A third shunt module, such as resistor R7.
Specifically, the third switching module may include: the third switch tube, the third starting module, the fourth shunting module and the fifth shunting module. The third power supply signal is connected to the base electrode of the third switching tube through the third starting module, the collector electrode of the third switching tube is connected to the common end of the first voltage division module and the first voltage division module through the fourth voltage division module and the fifth voltage division module which are connected in parallel, and the emitter electrode of the third switching tube is grounded. For example: and a third transistor, such as a third transistor Q3. A third enabling block, such as base resistor R3. A fourth shunting module, such as resistor R4. A fourth shunting module, such as resistor R5.
For example: and transistors Q1, Q2 and Q3, which are used as frequency switching control switches. Base resistors R1, R2, and R3 may be used to provide a base current for transistor turn-on. The resistors R4, R5, R6, R7, and R8, as pull-up shunt resistors, may be used to adjust the magnitude of the feedback current according to the load adjustment frequency. And the main chip controls the signal of the corresponding triode switch according to the power supply signal which is output by the load and is related to the frequency threshold.
Therefore, the switch tube is used as the switch unit, the structure is simple, and the control reliability is good.
In an alternative embodiment, the method may further include: and an isolation unit. For example: the isolation unit can be a photoelectric coupler.
Specifically, the isolation unit may be configured to perform photoelectric isolation on a signal that is switched on by a control branch of the current power signal, and transmit the signal to a control end of the switching power supply. The control terminal of the switching power supply, for example, the control pin C of the switching power supply chip U1.
For example: according to the control circuit for adjusting the switching frequency according to the load, the control circuit is composed of a first switching tube Q1, a second switching tube Q2, a third switching tube Q3 and resistors R1-R8, according to the weight of the load, the main chip outputs control signals to switch on different triodes QX (namely the first switching tube Q1, the second switching tube Q2 and the third switching tube Q3), and the control signals are fed back to a frequency control pin of the switching power supply through optical couplers, so that the switching frequency is adjusted in a self-adaptive mode according to the load, and the switching loss is reduced. When the standby state is entered again, the signal of the first power source LOWPOWER1 is fed back to the first transistor Q1 continuously through the MCU internal logic.
Therefore, the signal which controls the opening of the branch of the current power supply signal is subjected to photoelectric isolation and then transmitted through the isolation unit, and the accuracy of receiving the signal by the switching power supply is improved.
Through a large number of tests, the technical scheme of the invention is adopted to realize low-power consumption control of the air conditioner by adjusting the switching frequency of the air conditioner under different load states, so that the serious power consumption loss of the air conditioner in a standby state can be avoided, and the electric energy is saved.
According to the embodiment of the invention, an air conditioner corresponding to the power supply control device is also provided. The air conditioner may include: the above-described power supply control device.
In the operation process of the unit, the switching power supply adjusts the output of the rear end through a feedback loop to achieve a balance state. Some air conditioner controllers adopt a fixed frequency switch due to design problems, the switching frequency cannot be self-adjusted according to the load, and only the duty ratio is adjusted. The switching process with fixed frequency generates large loss.
The problem of large power consumption loss in the standby state and the operation stage of the air conditioner is considered. The scheme of the invention provides a low-power-consumption control circuit adaptive to a load, and the low-power-consumption operation of an air conditioner is met. By using the power supply low-power consumption control circuit, the real low power consumption can be achieved, and the electric energy is saved; the market competitiveness of the low-power-consumption air conditioner is improved.
Some switching power supply schemes implement the switching state of the switching power supply by adjusting the duty ratio of the switch; according to the load requirement, the duty ratio can be continuously adjusted, namely the switching power supply is switched on and off continuously, so that energy is stored for the rear-end winding. When the air conditioning system is in a light load state, the switching of the fixed frequency inevitably causes frequent switching waste. The scheme of the invention provides a power supply low-power consumption control circuit adaptive to a load, which comprises the following steps: the control circuits such as the MCU, the optocoupler detection, the triode control and the like realize that the air conditioner adjusts the switching frequency under different load states to achieve low power consumption control of the air conditioner, so that the serious power consumption loss of the air conditioner in a standby state can be avoided, and the electric energy is saved; the market competitiveness of the low-power-consumption air conditioner is improved.
Fig. 2 can show a schematic diagram of the power supply low power consumption control circuit.
As shown in fig. 2, after the air conditioner enters the operation state, the MCU main chip detects the load size to select the switching frequency, so as to achieve a switching power supply that varies with the load, thereby reducing unnecessary switching power consumption. In fig. 2, the floating winding of the transformer is the other load circuit.
As shown in fig. 2, a control circuit for adjusting the switching frequency according to the load is provided on the hardware, and the control circuit is composed of a first switch tube Q1, a second switch tube Q2, a third switch tube Q3 and resistors R1-R8, and according to the weight of the load, the main chip outputs a control signal to turn on different triodes QX (i.e., the first switch tube Q1, the second switch tube Q2 and the third switch tube Q3), and feeds the control signal back to the frequency control pin of the switching power supply through optical coupling feedback, so that the switching frequency is adaptively adjusted according to the load, and the switching loss is reduced.
In fig. 2, a rectifier bridge DB1 may be used for rectification. And the switching power supply chip U1 can be used for supplying power. And bus capacitor C83, which can be used for filtering. The resistor R15 and the resistor R16 can be used for setting resistor voltage division and current limiting. And a resistor RCD can be used for absorbing leakage inductance energy. The transformer L may be used for energy conversion. An optical coupler U2 may be used to isolate the feedback. Diode D2 may be used for rectification. Resistor R13 acts as a pull-up resistor. The resistor R11 and the resistor R12 are used as current limiting resistors. The resistor R9 and the resistor R10 can be used for dividing and setting the output voltage. And transistors Q1, Q2 and Q3, which are used as frequency switching control switches. Base resistors R1, R2, and R3 may be used to provide a base current for transistor turn-on. The resistors R4, R5, R6, R7, and R8, as pull-up shunt resistors, may be used to adjust the magnitude of the feedback current according to the load adjustment frequency.
Fig. 3 may show a schematic block diagram of a main chip.
The three power signals in fig. 3 are power signals related to a frequency threshold value output by the main chip according to the magnitude of the load, and control signals of the corresponding triode switch in fig. 2.
Specifically, according to the characteristics of the switching power supply, the load state of the air conditioner can be detected by using the MCU main chip, different state signals of the air conditioner are fed back to the corresponding LOWPOWER1, LOWPOWER2 and LOWPOWER3 when the air conditioner is in the load state, the MCU controls the optical coupling circuit and feeds back to the switching power supply to select corresponding switching frequency, so that the switching frequency in the same time is reduced, and the problem that the switching loss is serious when the frequency is unchanged and only the duty ratio is adjusted under different states of the air conditioner is solved.
Optionally, when the air conditioning system is powered on, the air conditioning system is in a standby state; feeding back a signal of a first power supply LOWPOWER1 to a first triode Q1 through MCU internal logic, controlling the conduction of a first triode Q1, feeding back the signal to a switching power supply chip U1 through an optocoupler detection circuit U2, and switching on a frequency pin F of a switching power supply chip U1 and a source S of the switching power supply chip U1 through a control pin C of the switching power supply chip U1 so as to adjust the switching frequency to the lowest state; further, when the frequency pin F of the switching power supply chip U1 is connected to the source S of the switching power supply chip U1, the switching power supply chip operates at the lowest switching frequency, so that the switching loss is reduced.
Optionally, when the air conditioning system receives an external power-on instruction, the MCU executes the load output command, which is in an operating state.
In the operating state, when the air conditioner executes control, the power changes along with the load change at the rear end, when the MCU internal logic detects that the power is in the threshold range of the second power supply LOWPOWER2, the signal of the second power supply LOWPOWER2 is fed back to the second triode Q2, the conduction of the second triode Q2 is controlled, the signal is fed back to the switching power supply chip U1 through the optical coupling detection circuit U2, the control pin C of the switching power supply chip U1 is connected with the frequency pin F of the switching power supply chip U1 through the control pin C of the switching power supply chip U1, the switching frequency is adjusted to the corresponding threshold state, and therefore the high-efficiency output of the high-frequency band of the switching power supply is met.
In the operating state, when the air conditioner load is heavy load, and in the same way, when the power is detected to be within the threshold range of the third power supply LOWPOWER3, a signal of the third power supply LOWPOWER3 is fed back to the third triode Q3, the conduction of the third triode Q3 is controlled, the signal is fed back to the switching power supply chip U1 through the optical coupling detection circuit U2, the control pin C of the switching power supply chip U1 is connected with the frequency pin F of the switching power supply chip U1 through the control pin C of the switching power supply chip U1, the switching frequency is adjusted to the threshold state, and therefore the high-efficiency output of the switching power supply in the high frequency range is met.
In this way, when the standby state is entered again, the signal of the first power source LOWPOWER1 is fed back to the first transistor Q1 through the MCU internal logic.
It can be seen that by using the principle of a switching power supply, t is 1/f, and in the same time period t, the switching frequency f is larger, the switching times are more, and the switching loss of the air conditioner is larger; and the MCU executes related actions through external instruction information, so that the switching power supply works in the most appropriate and effective frequency band, and the purpose of self-adapting with the load and low power consumption is achieved.
Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the apparatus shown in fig. 1, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the embodiments, which are not described herein again.
Through a large number of tests, the technical scheme of the invention is adopted, and the switching frequency of the air conditioner is adjusted under different load states through the low-power-consumption control circuit which is self-adaptive along with the load, so that the low-power-consumption operation of the air conditioner is met.
According to an embodiment of the present invention, there is also provided a power supply control method for an air conditioner corresponding to the air conditioner, as shown in fig. 4, which is a schematic flow chart of an embodiment of the method of the present invention. The power supply control method of the air conditioner may include steps S110 to S130.
At step S110, determining, by the control unit, a current state of the appliance, and determining a current power signal of the appliance according to the current state of the appliance, and transmitting the current power signal of the appliance.
The current state may include: standby state and running state. The operation state can comprise: the load power consumption of the first load state is smaller than that of the second load state. The current power supply signal may include: any one of the first power signal, the second power signal, and the third power signal.
Optionally, the determining, by the control unit, the current power signal of the electrical appliance according to the current state of the electrical appliance in step S110 may include: if the current state is the standby state, the current power supply signal is a first power supply signal; if the current state is the first load state, the current power supply signal is the second power supply signal; and if the current state is the second load state, the current power supply signal is a third power supply signal.
Therefore, different power supply signals are provided for different states of the electric appliance, different switching frequencies are conveniently provided for different states of the electric appliance, and loss is reduced.
In step S120, according to the current power signal of the electrical appliance, the control branch of the current power signal is turned on through the switch unit, and a turn-on signal for turning on the control branch of the current power signal is obtained.
At step S130, the current switching frequency is adjusted by the switching power supply according to the signal that the control branch of the current power supply signal is turned on, so that the current switching frequency of the switching power supply matches the current state of the electrical appliance.
For example: a load-adaptive low-power-consumption control circuit can solve the problem of high power consumption loss in the standby state and the operation stage of an air conditioner, meet the low-power-consumption operation of the air conditioner, achieve true low power consumption and save electric energy. If the air conditioner enters the operation working state, the MCU main chip detects the size of the load to select the switching frequency, so that the switching power supply which continuously changes along with the load is achieved, and unnecessary switching consumption is reduced.
For example: can realize that the air conditioner adjusts switching frequency under different load states through control circuits such as MCU, opto-coupler detection, triode control and reach the low-power consumption control of air conditioner, can avoid air conditioner standby state power consumption serious, practice thrift the electric energy. Specifically, according to the characteristics of the switching power supply, the load state of the air conditioner can be detected by using the MCU main chip, different state signals of the air conditioner are fed back to the corresponding LOWPOWER1, LOWPOWER2 and LOWPOWER3 when the air conditioner is in the load state, the MCU controls the optical coupling circuit and feeds back to the switching power supply to select corresponding switching frequency, so that the switching frequency in the same time is reduced, and the problem that the switching loss is serious when the frequency is unchanged and only the duty ratio is adjusted under different states of the air conditioner is solved.
Therefore, the switching frequency of the switching power supply of the electric appliance is adjusted according to different states of the electric appliance, and the phenomenon that the switching power supply is frequently started to increase energy consumption is avoided.
Optionally, the current switching frequency is adjusted by the switching power supply according to the signal that the control branch of the current power supply signal is turned on in step S130, which may include any one of the following adjustment situations.
The first regulation case: if the current state is the standby state, the frequency end of the switching power supply is connected with the source electrode of the switching power supply through the control end of the switching power supply so as to adjust the switching frequency of the switching power supply to the set lowest frequency.
For example: when the air conditioning system is powered on, the air conditioning system is in a standby state; feeding back a signal of a first power supply LOWPOWER1 to a first triode Q1 through MCU internal logic, controlling the conduction of a first triode Q1, feeding back the signal to a switching power supply chip U1 through an optocoupler detection circuit U2, and switching on a frequency pin F of a switching power supply chip U1 and a source S of the switching power supply chip U1 through a control pin C of the switching power supply chip U1 so as to adjust the switching frequency to the lowest state; further, when the frequency pin F of the switching power supply chip U1 is connected to the source S of the switching power supply chip U1, the switching power supply chip operates at the lowest switching frequency, so that the switching loss is reduced.
The second regulation case: if the current state is the first load state, the control end of the switching power supply is connected with the frequency end of the switching unit, and the current frequency of the switching power supply is adjusted to be within a first switching frequency threshold range matched with the second power supply signal.
For example: when the air conditioning system receives an external starting instruction, the MCU executes a load output command at the moment, and the running state is realized at the moment. In the operating state, when the air conditioner executes control, the power changes along with the load change at the rear end, when the MCU internal logic detects that the power is in the threshold range of the second power supply LOWPOWER2, the signal of the second power supply LOWPOWER2 is fed back to the second triode Q2, the conduction of the second triode Q2 is controlled, the signal is fed back to the switching power supply chip U1 through the optical coupling detection circuit U2, the control pin C of the switching power supply chip U1 is connected with the frequency pin F of the switching power supply chip U1 through the control pin C of the switching power supply chip U1, the switching frequency is adjusted to the corresponding threshold state, and therefore the high-efficiency output of the high-frequency band of the switching power supply is met.
The third regulation case: and if the current state is the second load state, switching on the control end of the switching power supply and the frequency end of the switching unit, and adjusting the current frequency of the switching power supply to be within a second switching frequency threshold range matched with the third power supply signal.
For example: when the air conditioning system receives an external starting instruction, the MCU executes a load output command at the moment, and the running state is realized at the moment. In the operating state, when the air conditioner load is heavy load, and in the same way, when the power is detected to be within the threshold range of the third power supply LOWPOWER3, a signal of the third power supply LOWPOWER3 is fed back to the third triode Q3, the conduction of the third triode Q3 is controlled, the signal is fed back to the switching power supply chip U1 through the optical coupling detection circuit U2, the control pin C of the switching power supply chip U1 is connected with the frequency pin F of the switching power supply chip U1 through the control pin C of the switching power supply chip U1, the switching frequency is adjusted to the threshold state, and therefore the high-efficiency output of the switching power supply in the high frequency range is met.
Therefore, by arranging the plurality of control branches, the switching frequency of the switching power supply is controlled by different control branches according to different states of the electric appliance, the switching frequency can be adjusted according to the adaptability of the electric appliance to different states, and the phenomenon that the energy consumption is increased due to frequent switching of the switching power supply is avoided.
In an alternative embodiment, the method may further include: and after the signal of the control branch of the current power supply signal is subjected to photoelectric isolation through the isolation unit, the signal is transmitted to the control end of the switching power supply. The control terminal of the switching power supply, for example, the control pin C of the switching power supply chip U1.
For example: according to the control circuit for adjusting the switching frequency according to the load, the control circuit is composed of a first switching tube Q1, a second switching tube Q2, a third switching tube Q3 and resistors R1-R8, according to the weight of the load, the main chip outputs control signals to switch on different triodes QX (namely the first switching tube Q1, the second switching tube Q2 and the third switching tube Q3), and the control signals are fed back to a frequency control pin of the switching power supply through optical couplers, so that the switching frequency is adjusted in a self-adaptive mode according to the load, and the switching loss is reduced. When the standby state is entered again, the signal of the first power source LOWPOWER1 is fed back to the first transistor Q1 continuously through the MCU internal logic.
Therefore, the signal which controls the opening of the branch of the current power supply signal is subjected to photoelectric isolation and then transmitted through the isolation unit, and the accuracy of receiving the signal by the switching power supply is improved.
Since the processing and functions implemented by the method of this embodiment substantially correspond to the embodiments, principles and examples of the air conditioner, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of this embodiment.
After a large number of tests prove that by adopting the technical scheme of the embodiment, after the air conditioner enters the running working state, the switching frequency is selected by detecting the size of the load, so that the switching power supply can work in the most appropriate and effective frequency section and is self-adaptive with the load, and the low power consumption is realized.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (8)

1. A power supply control device of an air conditioner, characterized by comprising: the control unit, the switch unit and the switch power supply; wherein the content of the first and second substances,
the control unit is used for determining the current state of the electric appliance and determining the current power supply signal of the electric appliance according to the current state of the electric appliance;
the switch unit is used for switching on a control branch of a current power supply signal according to the current power supply signal of the electric appliance;
the switching power supply is used for adjusting the current switching frequency according to a signal for controlling the branch circuit to be switched on of a current power supply signal;
after the air conditioner enters the operation working state, the MCU main chip detects the size of the load to select the switching frequency, so as to achieve the switching power supply which continuously changes along with the load;
wherein the current state comprises: a standby state and an operating state; an operational state comprising: the load power consumption of the first load state is less than that of the second load state;
a current power supply signal comprising: any one of the first power signal, the second power signal, and the third power signal;
the control unit determines the current power supply signal of the electric appliance according to the current state of the electric appliance, and the method comprises the following steps:
if the current state is the standby state, the current power supply signal is a first power supply signal;
if the current state is the first load state, the current power supply signal is the second power supply signal;
if the current state is the second load state, the current power supply signal is a third power supply signal;
a switch unit comprising: a first switch module, a second switch module and a third switch module;
the switching power supply adjusts the current switching frequency according to the signal of the control branch circuit of the current power supply signal, including:
if the current state is the standby state, the frequency end of the switching power supply is connected with the source electrode of the switching power supply through the control end of the switching power supply so as to adjust the switching frequency of the switching power supply to the set lowest frequency;
if the current state is the first load state, the control end of the switching power supply is connected with the frequency end of the switching unit, and the current frequency of the switching power supply is adjusted to be within a first switching frequency threshold range matched with the second power supply signal;
and if the current state is the second load state, switching on the control end of the switching power supply and the frequency end of the switching unit, and adjusting the current frequency of the switching power supply to be within a second switching frequency threshold range matched with the third power supply signal.
2. The power supply control device according to claim 1, characterized by further comprising: an isolation unit;
and the isolation unit is used for carrying out photoelectric isolation on the signal for controlling the switching-on of the branch of the current power supply signal and then transmitting the signal to the control end of the switching power supply.
3. The power supply control device according to claim 1, wherein,
a first switch module comprising: the device comprises a first switch tube, a first starting module, a first current dividing module and a first voltage dividing module; the first power supply signal is connected to the base electrode of the first switching tube through the first starting module, and the collector electrode of the first switching tube is connected to the direct-current power supply after passing through the first voltage division module and the second voltage division module respectively;
a second switch module comprising: the second switch tube, the second starting module, the second shunt module and the third shunt module; a second power supply signal is connected to a base electrode of a second switching tube through a second starting module, and a collector electrode of the second switching tube is connected to a common end of the first voltage division module and the first voltage division module through a second shunt module and a third shunt module which are connected in parallel;
a third switch module comprising: the third switching tube, the third starting module, the fourth shunting module and the fifth shunting module; and a collector of the third switching tube is connected to a common end of the first voltage division module and the first voltage division module after passing through the fourth voltage division module and the fifth voltage division module which are connected in parallel.
4. An air conditioner, comprising: the power supply control device according to any one of claims 1 to 3.
5. A power supply control method of an air conditioner according to claim 4, comprising:
determining the current state of the electric appliance through the control unit, and determining the current power supply signal of the electric appliance according to the current state of the electric appliance;
switching on a control branch of a current power supply signal according to the current power supply signal of the electric appliance through a switch unit;
adjusting the current switching frequency according to a signal for controlling the branch circuit of the current power supply signal to be switched on by a switching power supply;
after the air conditioner enters the operation working state, the MCU main chip detects the size of the load to select the switching frequency, so that the switching power supply which continuously changes along with the load is achieved.
6. The power supply control method according to claim 5, characterized by further comprising:
and after the signal of the control branch of the current power supply signal is subjected to photoelectric isolation through the isolation unit, the signal is transmitted to the control end of the switching power supply.
7. The power supply control method according to claim 5 or 6, wherein the current state includes: a standby state and an operating state; an operational state comprising: the load power consumption of the first load state is less than that of the second load state;
a current power supply signal comprising: any one of the first power signal, the second power signal, and the third power signal;
determining a current power signal of the electrical appliance according to a current state of the electrical appliance through the control unit, including:
if the current state is the standby state, the current power supply signal is a first power supply signal;
if the current state is the first load state, the current power supply signal is the second power supply signal;
and if the current state is the second load state, the current power supply signal is a third power supply signal.
8. The power supply control method according to claim 7, wherein adjusting the current switching frequency by the switching power supply according to the signal that the control branch of the current power supply signal is turned on comprises:
if the current state is the standby state, the frequency end of the switching power supply is connected with the source electrode of the switching power supply through the control end of the switching power supply so as to adjust the switching frequency of the switching power supply to the set lowest frequency;
if the current state is the first load state, the control end of the switching power supply is connected with the frequency end of the switching unit, and the current frequency of the switching power supply is adjusted to be within a first switching frequency threshold range matched with the second power supply signal;
and if the current state is the second load state, switching on the control end of the switching power supply and the frequency end of the switching unit, and adjusting the current frequency of the switching power supply to be within a second switching frequency threshold range matched with the third power supply signal.
CN202010158885.3A 2020-03-09 2020-03-09 Power supply control device, air conditioner and power supply control method of air conditioner Active CN111404383B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010158885.3A CN111404383B (en) 2020-03-09 2020-03-09 Power supply control device, air conditioner and power supply control method of air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010158885.3A CN111404383B (en) 2020-03-09 2020-03-09 Power supply control device, air conditioner and power supply control method of air conditioner

Publications (2)

Publication Number Publication Date
CN111404383A CN111404383A (en) 2020-07-10
CN111404383B true CN111404383B (en) 2022-03-15

Family

ID=71413248

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010158885.3A Active CN111404383B (en) 2020-03-09 2020-03-09 Power supply control device, air conditioner and power supply control method of air conditioner

Country Status (1)

Country Link
CN (1) CN111404383B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201887660U (en) * 2010-12-24 2011-06-29 海信（山东）空调有限公司 LPC switch power supply circuit and air conditioner with same
CN202394143U (en) * 2011-09-28 2012-08-22 深圳麦格米特电气股份有限公司 Control circuit capable of reducing standby power consumption of switching power supply
CN103208934A (en) * 2012-01-11 2013-07-17 成都启臣微电子有限公司 Pulse width modulation switching power supply controller and switching power supply
CN208300070U (en) * 2018-03-29 2018-12-28 成都智芯微科技有限公司 The high-power LED drive circuit of constant current is realized based on frequency modulation ballast

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102685420A (en) * 2011-03-08 2012-09-19 青岛海信电器股份有限公司 Standby control module and television
CN102332827B (en) * 2011-06-24 2014-08-20 苏州佳世达电通有限公司 Power supply converter with electricity-saving mechanism and power supply conversion method
CN202435294U (en) * 2012-01-11 2012-09-12 成都启臣微电子有限公司 Pulse width modulation switch power supply controller and switch power supply

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201887660U (en) * 2010-12-24 2011-06-29 海信（山东）空调有限公司 LPC switch power supply circuit and air conditioner with same
CN202394143U (en) * 2011-09-28 2012-08-22 深圳麦格米特电气股份有限公司 Control circuit capable of reducing standby power consumption of switching power supply
CN103208934A (en) * 2012-01-11 2013-07-17 成都启臣微电子有限公司 Pulse width modulation switching power supply controller and switching power supply
CN208300070U (en) * 2018-03-29 2018-12-28 成都智芯微科技有限公司 The high-power LED drive circuit of constant current is realized based on frequency modulation ballast

Also Published As

Publication number Publication date
CN111404383A (en) 2020-07-10

Similar Documents

Publication Publication Date Title
US6297601B1 (en) Apparatus and method for saving electric power in a display system
CN113794379B (en) Cascade converter and control method thereof
CN201656779U (en) Low power consumption standby circuit and electric appliance
CN212204951U (en) Power supply system and air conditioner
CN108667289B (en) Power supply device and power supply method
CN108488948B (en) Air conditioner, air conditioner control system and outdoor unit switch circuit
CN111404383B (en) Power supply control device, air conditioner and power supply control method of air conditioner
CN216774278U (en) Surge suppression control circuit
CN207489241U (en) A kind of electrical equipment and its Zero consumption standby circuit
WO2022057281A1 (en) Voltage output apparatus and voltage output control method
CN215647484U (en) LED driving power supply
CN110308686B (en) Electric equipment controller, driving method thereof and electric equipment
CN113890378A (en) Control method of switching power supply and switching power supply
CN211925953U (en) Low-power consumption control system and air conditioner
WO2015139337A1 (en) Standby power consumption control circuit and method
JPH09107678A (en) Power supply
CN113765365A (en) Control method of switching power supply and switching power supply
KR20110059119A (en) Electrical power-saving control apparatus, power supply including that apparatus and power-saving method thereof
CA3084643A1 (en) Power fetching system for no neutral switch and control method thereof, no neutral switch
CN218162232U (en) Low-power-consumption power supply system and control system
CN218301214U (en) Output voltage soft switching circuit
CN211630068U (en) Switching power supply control circuit capable of realizing frequency switching and air conditioning equipment
US11122661B2 (en) Driver, controlling method and illumination system
KR100371164B1 (en) Electrical apparatus having power saving mode
CN210724727U (en) Single-live-wire electronic switch circuit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant