CN110868060A

CN110868060A - Control method, control device, household appliance and computer readable storage medium

Info

Publication number: CN110868060A
Application number: CN201911204449.9A
Authority: CN
Inventors: 北本学; 文先仕; 曾贤杰; 张杰楠
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-03-06
Anticipated expiration: 2039-11-29
Also published as: CN110868060B

Abstract

The invention provides a control method, a control device, household electrical appliance equipment and a computer readable storage medium, wherein the control method is suitable for a control circuit, a Power Factor Correction (PFC) circuit is arranged in the control circuit, when a switch device in the PFC circuit receives a pulse signal, the amplitude of bus voltage output by the PFC circuit is increased, and the control method comprises the following steps: detecting a bus voltage of the drive control circuit; and controlling a plurality of pulse signals to be input into the switching device or controlling the PFC circuit to be in an intermittent state according to the bus voltage. By the technical scheme, normal operation of the load can be guaranteed, the voltage loss of the bus can be reduced under the condition of low load, the switching loss is reduced, and the harmonic performance and efficiency of the control circuit are improved.

Description

Control method, control device, household appliance and computer readable storage medium

Technical Field

The present invention relates to the field of circuit technologies, and in particular, to a control method, a control apparatus, a home appliance, and a computer-readable storage medium.

Background

In the current inverter air-conditioning market, in order to improve the operating energy efficiency of a load, a rectifier, an inductor, a PFC (power factor Correction) module, an electrolytic capacitor and an inverter are generally used to form a control circuit of a motor (load).

In the related art, in order to reduce the power consumption of the BOOST PFC and the power consumption of the rectifier, the totem-pole PFC module is used to replace the BOOST PFC and the rectifier, but the efficiency and the harmonic performance of the control circuit still need to be improved.

Moreover, any discussion of the prior art throughout the specification is not an admission that the prior art is necessarily known to a person of ordinary skill in the art, and any discussion of the prior art throughout the specification is not an admission that the prior art is necessarily widely known or forms part of common general knowledge in the field.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

In view of the above, an object of the present invention is to provide a control method.

Another object of the present invention is to provide a control device.

It is yet another object of the present invention to provide a home appliance.

It is yet another object of the present invention to provide a computer-readable storage medium.

In order to achieve the above object, a technical solution of a first aspect of the present invention provides a control method, which is applied to a control circuit, wherein the control circuit is provided with a PFC circuit, and when a switching device in the PFC circuit receives a pulse signal, an amplitude of a bus voltage output through the PFC circuit increases, and the control method includes: detecting a bus voltage of the drive control circuit; and controlling a plurality of pulse signals to be input into the switching device or controlling the PFC circuit to be in an intermittent state according to the bus voltage.

In the technical scheme, the bus voltage is improved by inputting a plurality of pulse signals to the switching device under the conditions that the load is large and the bus voltage is low, and the switching device of the PFC is controlled to be in an intermittent state under the conditions that the load is small and the bus voltage is low, so that the switching loss and the bus voltage loss are reduced, and the harmonic performance and the efficiency of the control circuit are improved.

For example, when the time when the bus voltage is determined to need to be increased is T1, the time when the pulse signals are input into the switching device at T1 to T2, the bus voltage is still increased in a period from T2 to T3 after the pulse signals are stopped being input, and the bus voltage starts to be reduced after the time T3, so that the working time of the switching device is maximally reduced.

It is worth pointing out that the duty ratio and the frequency of the pulse signal are both adjustable, so as to solve the problem that the bus voltage can be improved, thereby ensuring the reliable operation of the load and reducing the harmonic signal in the control circuit.

In the above technical solution, according to the bus voltage, controlling to input a plurality of pulse signals to the switching device specifically includes: determining a first bus voltage given value according to the load of the driving control circuit; judging whether the bus voltage is less than or equal to a first bus voltage given value or not; and judging that the bus voltage is less than or equal to the first bus voltage given value, and controlling to input a plurality of pulse signals to the switching device.

In the technical scheme, the first bus voltage given value is set according to the load amount, and the first bus voltage given value is mainly used for determining the lower limit value of the bus voltage for maintaining the load operation, so that the load is prevented from being suddenly powered off, and the reliability of the load operation is ensured.

In the above technical solution, determining that the bus voltage is less than or equal to the first bus voltage given value, and controlling to input a plurality of pulse signals to the switching device specifically includes: judging that the bus voltage is less than or equal to a first bus voltage given value, and predicting the next zero-crossing moment of the alternating current signal input into the control circuit; from the next zero-crossing time, a plurality of pulse signals are input to the switching device.

In the technical scheme, the next zero-crossing time of the alternating current signal input into the control circuit is predicted, and a plurality of pulse signals are input into the switching device from the next zero-crossing time, so that the bus voltage can be timely improved, and the harmonic waves in the control circuit can be reduced.

In the above technical solution, the inputting a plurality of pulse signals to the switching device from the next zero-crossing time specifically includes: determining a second bus voltage given value according to the load of the drive control circuit; determining a signal difference between the first bus voltage setpoint and the second bus voltage setpoint; determining a half-wave period of bus voltage rising according to the signal difference value, and recording the half-wave period as a boosting half-wave period; a plurality of pulse signals are input to the switching device from the zero-crossing time of any one of the boosting half-wave periods.

In the technical scheme, a second bus voltage given value is determined according to the load of the drive control circuit, and a voltage boosting half-wave period is determined by determining a signal difference value between the first bus voltage given value and the second bus voltage given value, wherein the half-wave period refers to a complete half wave of an alternating current signal, a plurality of pulse signals are input to a switching device at the zero-crossing point moment, the bus voltage is increased, and the possibility of sudden power failure of a load is reduced.

In the above technical solution, according to the bus voltage, controlling the PFC circuit to be in an intermittent state specifically includes: determining a third bus voltage given value according to the load of the drive control circuit; judging whether the bus voltage is greater than or equal to the third bus voltage given value or not; and judging that the bus voltage is greater than or equal to the third bus voltage given value, and controlling the PFC circuit to be in an intermittent state.

In the technical scheme, a third bus voltage given value is determined according to the load of the drive control circuit, the third bus voltage given value is set so as to further improve the reliability of the control circuit, the third bus voltage given value is usually determined according to the voltage resistance index of an electrolytic capacitor and the voltage resistance index of an inverter switch, and the bus voltage when the control circuit supplies power is obtained, namely when the bus voltage is detected to be greater than or equal to the third bus voltage given value, the PFC circuit is controlled to be in an intermittent state, so that the PFC circuit is prevented from being broken down.

It will be appreciated that the PFC circuit is in an intermittent state, i.e. the switches in the PFC circuit are controlled not to perform a switching action.

In the above technical solution, the PFC circuit is a boost PFC circuit, a power conversion device is disposed between the boost PFC circuit and a power grid system to which an ac signal is input, and the step of determining that the bus voltage is greater than or equal to the third bus voltage given value and controlling the PFC circuit to be in an intermittent state specifically includes: and judging that the bus voltage is greater than or equal to the third bus voltage given value, and controlling a switching device of the boost PFC circuit to cut off or synchronously rectify so as to enable the boost PFC circuit to be in the intermittent state, wherein the switching device cuts off or synchronously rectify, and the alternating current signal is converted into a direct current signal through the power conversion device and is connected to a bus line.

In the technical scheme, the switching device of the boost PFC circuit is controlled to be switched off or synchronously rectified by judging that the bus voltage is greater than or equal to the third bus voltage given value, so that the boost PFC circuit is in the intermittent state, and the possibility that the switching device is broken down or burnt is reduced.

In the above technical solution, the PFC circuit is a totem-pole PFC circuit, the totem-pole PFC circuit includes four bridge arms, the switching device connected to each bridge arm is a power tube, each power tube is connected to a reverse-biased diode, the totem-pole PFC circuit is connected to a power grid system of the ac signal, it is determined that the bus voltage is greater than or equal to the third bus voltage given value, and the PFC circuit is controlled to be in an intermittent state, and specifically, the method further includes: and judging that the bus voltage is greater than or equal to the third bus voltage given value, and controlling the power tube to cut off or synchronously rectify so as to enable the totem-pole PFC circuit to be in the intermittent state, wherein the power tube cuts off or synchronously rectify, and the alternating current signal is converted into a direct current signal through the reverse bias diode and is connected to a bus line.

In the technical scheme, the power tube is controlled to be cut off or synchronously rectified by judging that the bus voltage is greater than or equal to the third bus voltage given value, so that the totem-pole PFC circuit is in the intermittent state, and the possibility that a switching device is broken down or burnt is reduced.

In the above technical solution, determining that the bus voltage is greater than or equal to the given value of the second bus voltage, and controlling the PFC circuit to be in an intermittent state specifically includes: judging that the bus voltage is greater than or equal to a given value of the second bus voltage, and predicting the next zero-crossing time of the alternating current signal input into the control circuit; and determining that the next zero-crossing moment is reached, and controlling the power tube to cut off or synchronously rectify so as to enable the PFC circuit to be in an intermittent state.

In the technical scheme, the next zero-crossing time of the alternating current signal input into the control circuit is predicted by judging that the bus voltage is greater than or equal to the given value of the second bus voltage, the next zero-crossing time is determined, and the power tube is controlled to be cut off or synchronously rectified, so that the switching loss and the bus voltage loss are favorably reduced, and the harmonic wave in the control circuit can also be reduced.

In the above technical solution, the method further comprises: detecting the operating parameters of the load to determine the load capacity of the output end of the control circuit; and determining parameters corresponding to the pulse signals according to the bus voltage, wherein the parameters comprise at least one of duration, number, pulse width, duty ratio and frequency.

In the technical scheme, the load capacity of the output end of the control circuit is determined by detecting the operation parameters of the load, the parameters corresponding to the pulse signals are determined according to the bus voltage, the first bus voltage given value, the second bus voltage given value and the third bus voltage given value can be adjusted at any time according to the bus voltage, and the reliability, the harmonic performance and the power factor of the load operation are further improved.

The parameters corresponding to the pulse signals can be adjusted, and the purpose of adjusting the parameters is to improve the bus voltage.

In the above technical solution, the method further comprises: detecting the operating parameters of the load, and analyzing the operating parameters to determine the back electromotive force and the rotating speed of the load; the amount of load is determined from the back emf and the rotational speed.

According to the technical scheme, the back electromotive force and the rotating speed of the load are determined by detecting the operating parameters of the load and analyzing the operating parameters, and finally the load capacity is determined according to the back electromotive force and the rotating speed, so that the electric quantity and the bus voltage value required by the load operation are comprehensively determined, and the reliability of the load operation is ensured.

An aspect of the second aspect of the present invention provides a control apparatus comprising a processor which, when executing a computer program, implements a control method as defined in any one of the above aspects.

Therefore, the technical effect defined by any one of the technical schemes is achieved, and details are not repeated herein.

A third aspect of the present invention provides a home appliance, including: a load; a control device as defined in any of the above claims; the control circuit is controlled by the control device and provided with a PFC circuit, and the PFC circuit comprises at least one switching device which is configured to control a power supply signal to supply power to a load.

The processor of the control device implements the control method defined in any one of the above claims when executing the computer program.

Therefore, the technical effect of the control method defined by any one of the above technical schemes is achieved, and details are not repeated herein.

According to the third aspect of the present invention, the household electrical appliance optionally comprises at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector and a computer host.

An aspect of the fourth aspect of the present invention provides a computer-readable storage medium, where a computer program is executed by a processor to implement the steps of the control method defined in any one of the above technical solutions, so that the technical effects of the control method defined in any one of the above technical solutions are achieved, and details are not repeated here.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 shows a flow diagram of a control method according to an embodiment of the invention;

fig. 2 shows a circuit configuration diagram of the boost pfc of the control method according to an embodiment of the present invention;

fig. 3 shows a circuit configuration diagram of a totem-column type PFC according to a control method of an embodiment of the present invention;

FIG. 4 shows a schematic diagram of a circuit of a control method according to an embodiment of the invention;

FIG. 5 shows a flow diagram of a control method according to an embodiment of the invention;

FIG. 6 shows a voltage-current waveform diagram of a control method according to an embodiment of the invention;

FIG. 7 shows a voltage-current waveform diagram of a control method according to yet another embodiment of the invention;

FIG. 8 shows a schematic block diagram of a control device according to an embodiment of the present invention;

fig. 9 shows a schematic block diagram of a home device according to an embodiment of the present invention;

FIG. 10 shows a schematic block diagram of a computer-readable storage medium according to an embodiment of the invention.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Some embodiments according to the invention are described below with reference to fig. 1 to 10.

Example one

As shown in fig. 1, a flow chart of a control method according to an embodiment of the invention is shown, which includes:

step S102 detects a bus voltage of the drive control circuit.

And step S104, controlling to input a plurality of specified pulse signals to the switching device or controlling the PFC circuit to work in a high-frequency switching mode according to the bus voltage.

Example two

As shown in fig. 2, a block diagram of a BOOST PFC circuit according to a control method of an embodiment of the present invention includes:

alternating current power supply AC, a diode D1, a diode D2, a diode D3, a diode D4, an inductance coil L, a power tube Q0, a capacitor C, an inverter bridge and a compressor.

Wherein, the PFC circuit includes: inductor L, diode D1, diode D2, diode D3, and diode D4. When the switch device is turned on, the AC signal AC is sent to the PFC circuit, and a pulse signal is output, wherein C is an electrolytic capacitor.

EXAMPLE III

As shown in fig. 3, a structural diagram of a totem-column PFC circuit showing a control method according to an embodiment of the present invention includes:

the power supply comprises an alternating current power supply AC, an inductance coil L, a diode D1, a diode D2, a diode D3 and a diode D4 which are respectively reverse-biased diodes of a power tube Q1, a power tube Q2, a power tube Q3 and a power tube Q4, and further comprises a capacitor C, an inverter bridge and a compressor, wherein the compressor is an embodiment of a load.

Wherein, the PFC circuit includes: the inductive coil L, the diode D1, the diode D2, the diode D3, the diode D4, the power tube Q1, the power tube Q2, the power tube Q3, the power tube Q4 and the totem-pole PFC circuit can carry out synchronous rectification.

Example four

As shown in fig. 4, a schematic diagram of a circuit of a control method according to an embodiment of the present invention is shown, including: the device comprises an alternating current power supply AC, a current detection unit, a PFC circuit, a capacitor C, a load, an alternating current voltage detection unit, a driving unit, a control unit and a bus voltage detection unit.

The first switching device Q1, the second switching device Q2, the third switching device Q3 and the fourth switching device Q4 are controlled by a Control Unit, and in addition, the ac voltage detection Unit, the bus voltage detection Unit and the current detection Unit also send detection signals to the Control Unit, wherein the Control Unit may be one of a Micro-programmed Control Unit (MCU), a Central Processing Unit (CPU), a Digital Signal Processor (DSP), and an embedded device, but is not limited thereto.

EXAMPLE five

As shown in fig. 5, a flow chart of a control method according to an embodiment of the invention is shown, which includes:

step S502, bus voltage detection and alternating voltage detection.

Step S504, determining the current working state, continuing to execute step S506 if the current circuit state is determined to be the synchronous rectification state, and continuing to execute step S508 if the current circuit state is determined to be the multi-pulse state.

Step S506, determining whether the bus voltage is less than the threshold 1, returning to step S506 if the bus voltage is greater than or equal to the threshold 1, and continuing to execute step S510 if the bus voltage is less than the threshold 1.

Step S510, switching the PFC state to a multi-pulse operating state at a zero crossing point of the ac voltage.

Step S508, determining whether the bus voltage is greater than the threshold 2, if so, executing step S512, otherwise, executing step S508.

Step S512, switching the PFC state to a synchronous rectification state at the zero crossing point of the alternating-current voltage.

EXAMPLE six

As shown in fig. 6, a voltage-current waveform diagram illustrating a control method according to an embodiment of the present invention includes:

vertical axis voltage, first bus voltage threshold V1, second bus voltage threshold V2, third bus voltage threshold V3, horizontal axis state, intermittent state, on state, zero crossing, synchronous rectified drive signal, multi-pulse drive signal, bus voltage, input voltage, and input current.

Wherein, the intermittent state is a state that the switching device is disconnected, and turning on another state at the zero crossing point can reduce the harmonic signal in the control circuit, as shown in fig. 6, when the time that the bus voltage needs to be increased is determined as T1, the bus voltage falls to the first bus voltage threshold, in order to prevent the power failure caused by the voltage continuous falling, at the zero crossing point, i.e. at the time of T1, a plurality of pulse signals are input to the switching device to the time of T2, the switching device is closed, when a plurality of pulse signals of a certain time are input, the input is immediately stopped, in the time period of T2 to T3 after the input of the pulse signals is stopped, the bus voltage still rises, when the voltage value of the second threshold of the bus voltage is reached, because if the voltage continues to rise, the phenomenon of breaking down the circuit device can occur, a dangerous accident occurs, after the time of T3, the bus voltage starts to, the PFC circuit synchronously rectifies or stops working to reduce the working time of a switching device to the maximum extent, so that the reliable operation of a load is ensured, the switching loss is reduced, and the working efficiency of the circuit is improved.

EXAMPLE seven

As shown in fig. 7, a voltage-current waveform diagram illustrating a control method according to still another embodiment of the present invention includes:

vertical axis voltage, first bus voltage threshold V1, second bus voltage threshold V2, third bus voltage threshold V3, horizontal axis state, intermittent state, on state, zero crossing, bus voltage, input voltage, and input current.

Wherein, the intermittent state is a state that the switching device is disconnected, and turning on another state at the zero crossing point can reduce the harmonic signal in the control circuit, as shown in fig. 6, when the time that the bus voltage needs to be increased is determined as T1, the bus voltage falls to the first bus voltage threshold, in order to prevent the power failure caused by the voltage continuous falling, at the zero crossing point, i.e. at the time of T1, a plurality of pulse signals are input to the switching device to the time of T2, the switching device is closed, when a plurality of pulse signals of a certain time are input, the input is immediately stopped, in the time period of T2 to T3 after the input of the pulse signals is stopped, the bus voltage still rises, when the voltage value of the second threshold of the bus voltage is reached, because if the voltage continues to rise, the phenomenon of breaking down the circuit device can occur, a dangerous accident occurs, after the time of T3, the bus voltage starts to, the PFC circuit is cut off to reduce the working time of the switching device to the maximum extent, so that the reliable operation of the load is ensured, the switching loss is reduced, and the working efficiency of the circuit is improved.

Example eight

As shown in fig. 8, the embodiment of the present invention further discloses a control device 800, the control device 800 includes a processor 802, and the processor 802 executes a computer program to implement the control method defined in any one of the above embodiments. Therefore, the technical effect defined by any one of the above embodiments is achieved, and is not described herein again.

The Control device 800 includes at least one logic computing device selected from a Micro-programmed Control Unit (MCU), a Central Processing Unit (CPU), a Digital Signal Processor (DSP), a single chip, and an embedded device.

Example nine

As shown in fig. 9, an embodiment of the present invention further provides a home appliance 900, including: a load; the control device 800 as defined in any of the embodiments above; the control circuit is controlled by the control device and provided with a PFC circuit, and the PFC circuit comprises at least one switching device which is configured to control a power supply signal to supply power to a load. The processor of the control device 800, when executing the computer program, implements the steps of the control method as defined in any of the embodiments above. Therefore, the technical effect of the control method defined in any of the above embodiments is not described herein again. Optionally, the home appliance 900 includes at least one of an air conditioner, a refrigerator, a fan, a hood, a vacuum cleaner, and a computer mainframe.

Example ten

As shown in fig. 10, an embodiment of the present invention further provides a computer-readable storage medium 1000, where a computer program 1002 is stored in the computer-readable storage medium 1000, and when executed by a processor, the computer program 1002 implements the steps of the control method disclosed in any of the above embodiments, so that the technical effects of the control method in any of the above embodiments are achieved, and details are not repeated herein.

In this embodiment, the computer program 1002, when executed by a processor, implements the steps of:

a bus voltage of the drive control circuit is detected.

And controlling a plurality of specified pulse signals to be input into the switching device or controlling the PFC circuit to work in a high-frequency switching mode according to the bus voltage.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method is applicable to a control circuit, and is characterized in that a PFC circuit is arranged in the control circuit, and when a switching device in the PFC circuit receives a pulse signal, the amplitude of a bus voltage output by the PFC circuit is increased, and the control method comprises the following steps:

detecting a bus voltage of the control circuit;

and controlling a plurality of pulse signals to be input into the switching device or controlling the PFC circuit to be in an intermittent state according to the bus voltage.

2. The control method according to claim 1, wherein controlling the input of the plurality of pulse signals to the switching device according to the bus voltage specifically includes:

determining a first bus voltage given value according to the load of the drive control circuit;

judging whether the bus voltage is less than or equal to the first bus voltage given value or not;

and judging that the bus voltage is less than or equal to the first bus voltage given value, and controlling to input a plurality of pulse signals to the switching device.

3. The control method according to claim 2, wherein determining that the bus voltage is less than or equal to the first bus voltage given value and controlling the input of the plurality of pulse signals to the switching device specifically includes:

judging that the bus voltage is less than or equal to the first bus voltage given value, and predicting the next zero-crossing moment of an alternating current signal input into the control circuit;

inputting a plurality of the pulse signals to the switching device from the next zero-crossing timing.

4. The control method according to claim 3, wherein inputting a plurality of the pulse signals to the switching device from the next zero-crossing time specifically includes:

determining a second bus voltage given value according to the load of the drive control circuit;

determining a signal difference between the first bus voltage setpoint and the second bus voltage setpoint;

determining a half-wave period of the bus voltage rising according to the signal difference value, and recording the half-wave period as a boosting half-wave period;

and a plurality of pulse signals are input to the switching device from the zero-crossing time of any one of the boosting half-wave periods.

5. The control method according to claim 1, wherein controlling the PFC circuit to be in an intermittent state according to the bus voltage specifically comprises:

determining a third bus voltage given value according to the load of the drive control circuit;

judging whether the bus voltage is greater than or equal to the third bus voltage given value or not;

and judging that the bus voltage is greater than or equal to the third bus voltage given value, and controlling the PFC circuit to be in an intermittent state.

6. The control method according to claim 5, wherein the PFC circuit is a boost PFC circuit, a power conversion device is disposed between the boost PFC circuit and a power grid system to which an ac signal is input, and the step of determining that the bus voltage is greater than or equal to the third bus voltage given value and controlling the PFC circuit to be in an intermittent state specifically comprises:

determining that the bus voltage is greater than or equal to the third bus voltage given value, controlling a switching device of the boost PFC circuit to cut off or synchronously rectify current so as to enable the boost PFC circuit to be in the intermittent state,

the switching device is cut off or synchronously rectified, and the alternating current signal is converted into a direct current signal through the power conversion device and is connected to a bus line.

7. The control method according to claim 5, wherein the PFC circuit is a totem-pole PFC circuit, the totem-pole PFC circuit includes four bridge arms, the switching device connected to each bridge arm is a power tube, each power tube is connected to a reverse-biased diode, the totem-pole PFC circuit is connected to a power grid system of the AC signal, the bus voltage is determined to be greater than or equal to the given value of the third bus voltage, and the PFC circuit is controlled to be in an intermittent state, and specifically the method further includes:

judging that the bus voltage is greater than or equal to the third bus voltage given value, controlling the power tube to cut off or synchronously rectify so as to enable the totem-pole PFC circuit to be in the intermittent state,

the power tube is cut off or synchronously rectified, and the alternating current signal is converted into a direct current signal through the reverse bias diode and is connected to a bus line.

8. The control method according to any one of claims 5 to 7, wherein determining that the bus voltage is greater than or equal to the second bus voltage given value and controlling the PFC circuit to be in an intermittent state specifically comprises:

determining that the bus voltage is greater than or equal to the second bus voltage given value and the bus voltage is less than the third bus voltage given value, and predicting a next zero-crossing time of an alternating current signal input into the control circuit;

and determining that the next zero-crossing moment is reached, and controlling the power tube to cut off or synchronously rectify so as to enable the PFC circuit to be in the intermittent state.

9. The control method according to any one of claims 1 to 7, characterized by further comprising:

detecting an operating parameter of the load to determine the load capacity of the output end of the control circuit;

determining parameters corresponding to the pulse signals according to the load of the drive control circuit,

wherein the parameter includes at least one of a duration, a number, a pulse width, a duty cycle, and a frequency.

10. The control method according to any one of claims 1 to 7, wherein detecting the bus voltage of the control circuit specifically comprises:

detecting an operating parameter of a load and resolving the operating parameter to determine a back electromotive force and a rotation speed of the load;

and determining the load according to the back electromotive force and the rotating speed.

11. A control apparatus comprising a processor, wherein the processor when executing a computer program implements:

the steps of the control method according to any one of claims 1 to 10.

12. An appliance, comprising:

a load;

the control device of claim 11;

the control circuit is controlled by the control device and provided with a PFC circuit, and the PFC circuit comprises at least one switching device which is configured to control a power supply signal to supply power to a load.

13. The home device of claim 12,

the household appliance comprises at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector and a computer host.

14. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed, implements the steps of the control method according to any one of claims 1 to 10.