WO2025107497A1 - Control apparatus of air conditioner and control method therefor, and device and storage medium - Google Patents

Abstract

Disclosed in the present application are a control apparatus of an air conditioner and a control method therefor, and a device and a storage medium. The control apparatus comprises: a controller, a power supply circuit and an energy storage circuit. The controller is used for controlling the action of at least one valve body and supplying power to the at least one valve body; the energy storage circuit is used for supplying power to the controller, storing, when the power supply circuit supplies power to the energy storage circuit, electric energy outputted by the power supply circuit, and performing filtering and voltage stabilizing processing on the output power supply of the power supply circuit, and an output end of the energy storage circuit is connected to a power supply end of the controller; and the power supply circuit is used for performing conversion processing on an external power supply and then supplying power to the energy storage circuit, and and an output end of the power supply circuit is connected to a power supply end of the energy storage circuit.

Description

Air conditioner control device and control method, equipment and storage medium thereof

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on Chinese patent application with application number 202311591588.8 and application date November 24, 2023 and Chinese patent application with application number 202323202630.0 and application date November 24, 2023, and claims the priority of the above-mentioned Chinese patent applications. The entire contents of the above-mentioned Chinese patent applications are hereby introduced into this application as a reference.

Technical Field

The present application relates to the field of air conditioning, and in particular to a control device for an air conditioner and a control method, equipment and storage medium thereof.

Background Art

Electric valves are commonly used in air conditioners. The opening size, flow path cutoff and opening of the electric valve are controlled by sending pulse signals or turning the power on and off. The electric valve will be controlled to a set state before the air conditioner stops running.

In the related art, when the external power supply of the air conditioner is suddenly cut off, the controller of the air conditioner no longer controls the electric valve, and the electric valve maintains the opening state before the power failure until the next power-on. If there is a leak in the air conditioner, since the electric valve maintains the current opening state, the refrigerant in the refrigerant pipeline will leak into the environment around the air conditioner through the electric valve, and some types of refrigerants are flammable, which poses a safety hazard.

Summary of the invention

In view of this, an embodiment of the present application provides a control device for an air conditioner and a control method, equipment and storage medium thereof, which is intended to control the valve body to be in a fully closed state when the external power supply of the air conditioner is suddenly cut off, thereby improving the safety and reliability of the air conditioner.

The technical solution of the embodiment of the present application is implemented as follows:

In a first aspect, an embodiment of the present application provides a control device for an air conditioner, wherein at least one valve body is provided on a refrigerant pipeline of the air conditioner, comprising:

A controller configured to control the movement of the at least one valve body and supply power to the at least one valve body;

An energy storage circuit is used to supply power to the controller; the output end of the energy storage circuit is connected to the power supply end of the controller;

A power supply circuit, used to convert and process the external power supply and supply power to the energy storage circuit; the output end of the power supply circuit is connected to the power supply end of the energy storage circuit;

When the power supply circuit supplies power to the energy storage circuit, the energy storage circuit is used to store the electric energy output by the power supply circuit and perform filtering and voltage stabilization processing on the output power of the power supply circuit.

In some embodiments, the tank circuit comprises:

an energy storage unit, used to store the electric energy output by the power circuit and supply power to the controller when the power circuit is powered off;

A step-down circuit is used to step down the output voltage of the power supply circuit, charge the energy storage unit and supply power to the controller.

In some embodiments, the energy storage circuit further comprises:

a first voltage detection circuit, configured to detect an output voltage of the step-down circuit, obtain a first voltage value, compare the first voltage value with a first set voltage threshold, and send a first comparison result to the step-down circuit, wherein the step-down circuit controls a charging mode of the energy storage unit based on the first comparison result;

Wherein, the charging modes include: constant current charging mode and trickle charging mode.

In some embodiments, the control device further comprises:

The second voltage detection circuit is used to detect the power supply status of the external power supply, generate first power supply detection information indicating that the external power supply is normal, and send the first power supply detection information to the controller.

In some embodiments, the energy storage unit is further used to supply power to the controller for a first set time period when the power circuit is powered off;

Wherein, the first set time length is greater than or equal to the time length required for the controller to control the at least one valve body from a fully open state to a fully closed state.

In some embodiments, the energy storage unit is configured such that: when the power circuit is powered off, the output voltage value of the energy storage unit is greater than or equal to a second set voltage threshold within a first set time period;

The second set voltage threshold is the lower limit of the operating voltage allowed by the controller.

In some embodiments, the energy storage circuit and the controller are disposed on the same substrate.

In some embodiments, the control device is disposed on a main control panel of an outdoor unit of the air conditioner.

In some embodiments, the energy storage unit includes: an electrolytic capacitor.

In a second aspect, an embodiment of the present application provides a control method for the control device of the air conditioner as described in the first aspect of the embodiment of the present application, the method comprising:

Determining that the power circuit is de-energized;

Control the at least one valve body to close to a fully closed state.

In some embodiments, the method further comprises:

After controlling the at least one valve body to close for a first set time, the controller shuts down and cuts off the power. electricity;

Wherein, the first set time length is greater than or equal to the time length required for the controller to control the at least one valve body from a fully open state to a fully closed state.

In some embodiments, determining that the power circuit is powered off includes:

If the first power supply detection information is not received within a second set time period, it is determined that the power supply circuit is powered off;

The first power supply detection information is generated by the second voltage detection circuit of the control device and is used to indicate that the external power supply is normal.

In some embodiments, the method further includes: receiving first power supply detection information within a second set time period, and determining that the external power supply is supplying power normally;

Controlling the at least one valve body to be reset and in a set state;

The first power supply detection information is generated by the second voltage detection circuit of the control device and is used to indicate that the external power supply is normal.

In a third aspect, an embodiment of the present application provides a control device for the air conditioner described in the first aspect of the embodiment of the present application, wherein the controller is configured to execute the steps of the method described in the second aspect of the embodiment of the present application.

In a fourth aspect, an embodiment of the present application provides an electronic device, which is an air conditioner and includes: at least one valve body and the control device as described in the third aspect.

In a fifth aspect, an embodiment of the present application provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the second aspect of the embodiment of the present application are implemented.

The control device of the air conditioner provided in the embodiment of the present application includes: a controller for controlling the action of at least one valve body and supplying power to at least one valve body; an energy storage circuit for supplying power to the controller; the output end of the energy storage circuit is connected to the power supply end of the controller; a power supply circuit for supplying power to the energy storage circuit after converting and processing the external power supply; the output end of the power supply circuit is connected to the power supply end of the energy storage circuit; when the power supply circuit supplies power to the energy storage circuit, the energy storage circuit is used to store the electric energy output by the power supply circuit and filter and stabilize the output power of the power supply circuit. Based on the energy storage circuit set between the power supply circuit and the controller, in the case of a sudden power failure of the external power supply, the energy storage circuit can supply the stored electric energy to the controller, and then control the valve body to be completely closed, effectively preventing the flammable refrigerant from leaking through the valve body through the leak point to the surrounding environment of the air conditioner, and improving the safety and reliability of the air conditioner; the energy storage circuit and the controller are connected in series, and the energy storage circuit can be used as a voltage stabilizing circuit at the front end of the power supply end of the controller, and there is no need to set a voltage transformer circuit between the energy storage unit and the controller. Based on the miniaturized design of the energy storage circuit, the energy storage circuit and the controller are set on the same substrate, saving the cost of the control device.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a control device for an air conditioner according to an embodiment of the present application;

FIG2 is a schematic diagram of the structure of an energy storage circuit according to an embodiment of the present application;

FIG3 is a schematic diagram of the structure of an energy storage circuit in an application example of the present application;

FIG4 is a schematic diagram of the structure of a control device for an air conditioner in an application example of the present application;

FIG5 is a schematic structural diagram of a control device for an air conditioner in another application example of the present application;

FIG6 is a schematic flow chart of a control method of a control device according to an embodiment of the present application;

FIG7 is a schematic diagram of a second voltage detection circuit in an application example of the present application;

FIG8 is a waveform diagram of first power supply detection information in an application example of the present application;

FIG9 is a schematic structural diagram of an air conditioner in another application example of the present application;

FIG10 is a flow chart of a normal power-on control method for a control device in an application example of the present application;

FIG. 11 is a flow chart of a control method of a control device in an application example of the present application when an external power supply is suddenly cut off.

DETAILED DESCRIPTION

The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

An embodiment of the present application provides a control device for an air conditioner, as shown in FIG1 , wherein at least one valve body 400 is arranged on the refrigerant pipeline of the air conditioner, and the control device comprises: a controller 100, an energy storage circuit 200 and a power supply circuit 300, wherein the controller 100 is configured to control the action of at least one valve body 400 and supply power to at least one valve body 400; the energy storage circuit 200 is used to supply power to the controller 100; the output end of the energy storage circuit 200 is connected to the power supply end of the controller 100; the power supply circuit 300 is used to supply power to the energy storage circuit 200 after conversion processing of an external power supply 500; the output end of the power supply circuit 300 is connected to the power supply end of the energy storage circuit 200; wherein, when the power supply circuit 300 supplies power to the energy storage circuit 200, the energy storage circuit 200 is used to store the electric energy output by the power supply circuit 300, and filter and stabilize the output power of the power supply circuit 300.

Here, the refrigerant is used in the air conditioner to transfer heat energy to produce a cooling or heating effect; the refrigerant pipeline connects the indoor and outdoor units of the air conditioner for the circulation of the refrigerant; the valve body 400 controls the refrigerant flow in the refrigerant pipeline by adjusting the opening to produce different cooling or heating effects.

The valve body 400 may be an electric valve, and the embodiment of the present application does not specifically limit the type of the valve body 400; the air conditioner includes at least one valve body 400, and the number of valve bodies 400 may be determined according to the number of refrigerant pipelines.

It should be noted that when the controller 100 of the air conditioner receives an external shutdown command, the controller 100 will sequentially shut down the various working parts of the air conditioner according to the set shutdown steps. When all the shutdown steps are completed, the controller 100 executes the power-off step. At this time, the air conditioner loses control power and is in a shutdown and power-off state.

The set shutdown step includes the controller 100 controlling the valve body 400 to be in a set state.

It should be noted that in the related art, when the external power supply of the air conditioner is suddenly cut off, the controller loses input power and cannot execute the shutdown steps before the power failure. The controller no longer controls the valve opening, and the valve body maintains the opening state before the power failure until the next power is turned on. If there is a leak in the air conditioner, since the valve body maintains the current opening state, the refrigerant in the refrigerant pipeline will leak through the leak and the valve body into the surrounding environment of the air conditioner, posing a safety hazard; when the refrigerant is flammable, it may even cause an explosion.

It can be understood that the embodiment of the present application sets an energy storage circuit 200 between the power supply circuit 300 and the controller 100. In the event that the external power supply 500 suddenly loses power, the energy storage circuit 200 can supply the stored electrical energy to the controller 100. The controller 100 controls the valve body 400 to be completely closed, thereby effectively preventing the flammable refrigerant from leaking into the surrounding environment of the air conditioner through the leak and the valve body 400 when there is a leak in the air conditioner, thereby improving the safety and reliability of the air conditioner.

In one application example, the power supply circuit 300 may include a rectifier circuit, a filter circuit and a switching power supply circuit. The rectifier circuit is used to rectify the alternating current output by the external power supply 500 into direct current; the filter circuit is used to eliminate higher harmonics in the direct current output by the rectifier circuit; and the switching power supply circuit is used to adjust the voltage of the direct current output by the filter circuit and supply it to the energy storage circuit 200.

Exemplarily, as shown in FIG. 2 , the energy storage circuit 200 includes: an energy storage unit 201 and a step-down circuit 202. The energy storage unit 201 is used to store the electric energy output by the power supply circuit 300 and supply power to the controller 100 when the power supply circuit 300 is powered off; the step-down circuit 202 is used to charge the energy storage unit 201 and supply power to the controller 100 after stepping down the output voltage of the power supply circuit 300.

It can be understood that the output voltage of the power supply circuit 300 needs to be stepped down to a charging voltage by the step-down circuit 202 before charging the energy storage unit 201 and supplying power to the controller 100. Therefore, the output voltage of the power supply circuit 300 is greater than the rated working voltage of the controller 100. After the power supply circuit 300 is powered off, the energy storage unit 201 can directly supply power to the controller 100. Therefore, the nominal voltage of the energy storage unit 201 is within the allowable working voltage range of the controller 100.

Here, the rated operating voltage and the allowable operating voltage range of the controller 100 can be obtained from the technical specification provided by the manufacturer of the controller 100 .

It should be noted that, as an energy storage element, the energy storage unit 201 has a stable output voltage compared to the power supply circuit 300 and can directly supply power to the controller 100; when the output of the power supply circuit 300 is normal, the energy storage unit 201 can play a role in filtering and stabilizing the voltage.

It should be noted that the voltage resistance level of the step-down circuit 202 is higher than that of the controller 100. The output voltage of the power supply circuit 300 is stepped down by the step-down circuit 202 and then supplied to the controller 100. This can effectively reduce the impact of the output voltage fluctuation of the power supply circuit 300 on the controller 100. The step-down circuit 202 plays a role of filtering and stabilizing voltage.

It is understandable that the energy storage unit 201 directly supplies power to the controller 100 , and there is no need to set a voltage transformer circuit between the energy storage unit 201 and the controller 100 , thereby reducing the volume of the energy storage circuit 200 .

Exemplarily, the energy storage unit 201 includes: an electrolytic capacitor.

Here, the positive electrode of the electrolytic capacitor is a metal foil, and the negative electrode is mainly composed of an electrolyte. The capacitor has a large capacity per unit volume and can meet the demand of supplying power to the controller 100 .

Exemplarily, as shown in FIG3 , the energy storage circuit 200 further includes:

The first voltage detection circuit 203 is used to detect the output voltage of the buck circuit 202, obtain a first voltage value, compare the first voltage value with a first set voltage threshold, and send a first comparison result to the buck circuit 202. The buck circuit 202 controls the charging mode of the energy storage unit 201 based on the first comparison result; wherein the charging mode includes: a constant current charging mode and a trickle charging mode.

It should be noted that, due to the large capacity of the selected energy storage unit 201, the voltage of the energy storage unit 201 changes slowly during the charging process, and the first voltage detection circuit 203 cannot quickly provide the first comparison result feedback during the charging start process, and if the buck circuit 202 adopts the constant voltage charging mode to charge the energy storage unit 201, it is easy for the charging current of the energy storage unit 201 to be too large to exceed the power supply capacity of the power supply circuit 300, causing the power supply circuit 300 to trigger protection. Considering the above situation, in the embodiment of the present application, the buck circuit 202 needs to control the charging current of the energy storage unit 201 to be constant and not exceed the power supply capacity range of the power supply circuit 300.

In an application example of the present application, the buck circuit 202 also includes a current sampling feedback circuit, which is used to collect the output current value of the buck circuit 202 and feed the current value back to the buck circuit 202. The buck circuit 202 determines whether the charging current of the energy storage unit 201 is constant and does not exceed the power supply capacity of the power supply circuit 300 based on the feedback current value.

It is understandable that the charging mode of the energy storage unit 201 includes a constant current charging mode and a trickle charging mode. In the constant current charging mode, the buck circuit 202 charges the energy storage unit 201 with a constant preset charging current. As the charging process proceeds, the current power of the energy storage unit 201 gradually increases, and the charging voltage output by the buck circuit 202 also gradually increases; when the output voltage of the buck circuit 202 is equal to the target charging voltage of the energy storage unit 201 (i.e., the first set voltage threshold), the buck circuit 202 cannot maintain the constant charging current by increasing the output voltage. At this time, the buck circuit 202 charges the energy storage unit 201 in a trickle charging mode. In the trickle charging mode, the buck circuit 202 charges the energy storage unit 201 with a small current at a constant voltage to compensate for the power loss of the energy storage unit 201 due to self-discharge.

Here, considering that the energy storage unit 201 needs to reserve enough voltage derating, the first set voltage threshold should be smaller than the allowable charging voltage of the energy storage unit 201 at the current temperature.

Among them, the allowable charging voltage of the energy storage unit 201 can be a uniquely determined value, which can be determined in combination with the average temperature of the surrounding environment in which the air conditioner is located. For example, the average temperature is 25°C, and the allowable charging voltage of the energy storage unit 201 is determined. The first set voltage threshold should be less than the allowable charging voltage of the energy storage unit 201 at the average ambient temperature.

The voltage derating level of the energy storage unit 201 can be determined according to the surrounding environment of the air conditioner. For example, if the air conditioner is used in a ground environment, the voltage derating level of the energy storage unit 201 can be level 2 derating or level 3 derating.

It is understandable that the first voltage value acquired by the first voltage detection circuit 203 should be within the allowable operating voltage range of the controller 100 .

It should be noted that the first voltage detection circuit 203 includes a first comparator. It is used to compare the first voltage value with the first set voltage threshold, generate a first comparison result and send it to the step-down circuit 202, and the step-down circuit 202 controls the charging mode of the energy storage unit 201 based on the first comparison result.

Exemplarily, as shown in FIG. 4 , the control device further includes: a second voltage detection circuit 600 for detecting the power supply status of the external power supply 500 , generating first power supply detection information indicating that the external power supply 500 is supplying power normally, and sending the first power supply detection information to the controller 100 .

It can be understood that the controller 100 determines whether the external power supply 500 is supplying power normally based on the first power supply detection information sent by the second voltage detection circuit 600. The embodiment of the present application does not specifically limit the manner in which the second voltage detection circuit 600 detects the power supply status of the external power supply 500.

Exemplarily, the energy storage unit 201 is also used to supply power to the controller 100 within a first set time period when the power supply circuit 300 is powered off; wherein the first set time period is greater than or equal to the time required for the controller 100 to control at least one valve body 400 from a fully open state to a fully closed state.

It is understandable that when the power supply circuit 300 is powered off, the step-down circuit 201 cannot supply power to the controller 100, and the energy storage unit 201 is no longer charged. At this time, the electric energy stored in the energy storage unit 201 can supply power to the controller 100. To ensure that the controller 100 can control at least one valve body 400 to close to a fully closed state, the energy storage unit 201 supplies power to the controller 100 for at least a first set time period.

It can be understood that since the first set time length is greater than or equal to the time length required for the controller 100 to control the valve body 400 from a fully open state to a fully closed state, the controller 100 executes the control valve body 400 closing action for the first set time length, and it can be determined that the valve body 400 is in a fully closed state at this time.

Exemplarily, the energy storage unit 201 is configured such that when the power circuit is powered off 300 , the output voltage value of the energy storage unit 201 is greater than or equal to a second set voltage threshold within a first set time period; wherein the second set voltage threshold is the lower limit of the operating voltage allowed by the controller 100 .

It can be understood that the second set voltage threshold is the lower limit of the allowable operating voltage of the controller 100. When the output voltage value of the energy storage unit 201 is greater than or equal to the second set voltage threshold, the normal operation of the controller 100 can be guaranteed; when the output voltage value of the energy storage unit 201 is less than the second set voltage threshold, the normal operation of the controller 100 cannot be guaranteed.

It should be noted that the capacity of the energy storage unit 201 needs to ensure that in the discharge mode, after discharging for a first set time, the output voltage value of the energy storage unit 201 is greater than or equal to the second set voltage threshold, that is, the output voltage of the energy storage unit 201 can ensure that the controller 100 controls at least one valve body 400 to close to a fully closed state within the first set time, and the energy storage unit 201 meets the derating level requirements.

Here, the lower limit value of the operating voltage allowed by the controller 100 can be obtained from the technical specification provided by the manufacturer of the controller 100 .

Exemplarily, the energy storage circuit 200 and the controller 100 are disposed on the same substrate.

Exemplarily, the control device is arranged on a main control panel of an outdoor unit of the air conditioner.

It can be understood that the energy storage circuit 200 and the controller 100 in the embodiment of the present application are connected in series, the energy storage circuit 200 can be used as a voltage stabilizing circuit at the front end of the power supply end of the controller 100, and there is no need to set a voltage transformer circuit between the energy storage unit 201 and the controller 100. Based on the miniaturized design of the energy storage circuit 200, the energy storage circuit 200 and the controller 100 can be set on the same substrate, saving the cost of the control device.

In an application example of the present application, a structural schematic diagram of a control device for an air conditioner is provided, as shown in Figure 5. The power supply circuit 300 includes a rectifier circuit 301, a filter circuit 302, and a switch power supply circuit 303, and the controller 100 includes a control chip 101 and a valve body control circuit 102. The control chip 101 generates a valve body control instruction and sends it to the valve body control circuit 102. The valve body control circuit 102 generates n valve body control information based on the valve body control instruction, which is used to control the opening of the n valve bodies to be in a set state respectively.

Here, considering that the power supply voltages of the control chip 101 and the valve body control circuit 102 are different, the control device also includes a first controller power supply 701 and a second controller power supply 702, which are used to convert the output voltage of the energy storage circuit 200 into the power supply voltage of the control chip 101 and the valve body control circuit 102.

Here, at least one valve body 400 includes a first valve body 401 and a second valve body 402 , that is, the valve body control circuit 102 generates two valve body control information for controlling the opening of the first valve body 401 and the second valve body 402 to be in a set state.

The embodiment of the present application further provides a control method based on the aforementioned control device, as shown in FIG6 , the method includes:

Step 601, determine whether the power circuit is powered off.

Step 602, controlling at least one valve body to close to a fully closed state.

It can be understood that the control method of the embodiment of the present application, under the premise that the controller 100 has not received an external shutdown command, determines that the power circuit 300 is powered off, judges that the output voltage of the step-down circuit 201 will no longer be able to ensure the normal operation of the controller 100, and the controller 100 executes the shutdown procedure to control the valve body 400 to close to a fully closed state, thereby effectively avoiding the inability of the controller 100 to control the opening of the valve body 400 due to a sudden power failure of the external power supply 500, thereby eliminating the leakage of flammable refrigerant through the valve body into the surrounding environment of the air conditioner through the leak when there is a leak in the indoor unit of the air conditioner, thereby improving the safety and reliability of the air conditioner.

It is understandable that after the power circuit 300 is powered off, the energy storage unit 201 is no longer charged. Since the controller 100 continues to work, the energy storage unit 201 is converted from the charging mode to the discharging mode, and the energy storage unit 201 supplies power to the controller 100.

It should be noted that the energy storage unit 201 may be an electrolytic capacitor. When the output voltage value of the step-down circuit 202 is lower than the voltage value of the energy storage unit 201 , the energy storage unit 201 does not need to be controlled and directly supplies power to the controller 100 .

In an application example of the present application, after step 601, the control method further includes: stopping the compressor and the external DC fan.

Here, the controller 100 of the control device may control the start and stop of the compressor and the outdoor DC fan of the air conditioner in addition to controlling the opening of the valve body 400 .

Exemplarily, after step 602, the control method further includes: after controlling at least one valve body 400 to close for a first set time, the controller 100 shuts down and cuts off power; wherein the first set time is greater than or equal to the time required for the controller 100 to control at least one valve body 400 from a fully open state to a fully closed state.

It is understood that when the controller 100 determines that the power circuit 300 is powered off, the controller 100 The valve body 400 is controlled to be closed to a fully closed state. Since the controller 100 cannot directly detect the current opening of the valve body 400, the controller 100 controls the valve body 400 to be closed for a first set time period, wherein the first set time period is greater than or equal to the time period required for the controller 100 to control the valve body 400 from a fully open state to a fully closed state. This can indirectly determine that the valve body 400 is currently in a fully closed state. At this time, the controller 100 has executed all the set shutdown steps, and the air conditioner does not need to be powered on to work, and the controller 100 executes the power-off step.

It is understandable that after the control valve body 400 is closed to a fully closed state, the controller 100 is powered off and the energy storage unit 201 no longer supplies power to the controller 100 .

Exemplarily, determining that the power circuit 300 is powered off includes:

If the first power detection information is not received within the second set time period, it is determined that the power circuit 300 is powered off.

The first power supply detection information is generated by the second voltage detection circuit 600 of the control device, and is used to indicate that the external power supply 500 is supplying power normally.

Here, in an application example of the present application, the second voltage detection circuit 600 can be an optocoupler voltage detection circuit, as shown in Figure 7, the external power supply 500 is connected to the optocoupler IC71 through a diode D71 and a high-power resistor R71, the high-power resistor R72, the capacitor C71 and the Schottky diode D72 play a role in voltage stabilization and protection, and the optocoupler IC71 is turned on in the positive half-cycle of the output voltage of the external power supply 500, and the optocoupler is turned off in the negative half-cycle of the output voltage of the external power supply 500; the control power supply is grounded through the capacitor C72, and the output end of the optocoupler is connected to the pull-up resistor R73 and the high-power resistor R74. When the optocoupler IC71 is turned on, the controller 100 receives a low-level signal, and when the optocoupler IC71 is turned off, the controller 100 receives a high-level signal.

FIG8 is a waveform diagram of first power supply detection information in an application example of the present application.

It can be understood that the first power supply detection information can be a low-level signal generated by the second voltage detection circuit 600. When the external power supply 500 is supplying power normally, the controller 100 will periodically receive the low-level signal according to the frequency of the output voltage of the external power supply 500. If the controller 100 does not receive the low-level signal sent by the second voltage detection circuit 600 within the second set time period, it is judged that the external power supply 500 is supplying power abnormally, and then it is judged that the power supply circuit 300 powered by the external power supply 500 is powered off.

It can be understood that the second set time length is greater than or equal to one cycle of the output voltage of the external power supply 500. When the external power supply 500 is supplying power normally, within half of the second set time length, the controller 100 receives a low-level signal sent by the second voltage detection circuit 600, and within the other half of the second set time length, the controller 100 receives a high-level signal sent by the second voltage detection circuit 600.

Exemplarily, the method further includes: receiving first power supply detection information within a second set time period, and determining that the external power supply 500 is supplying power normally; and controlling at least one valve body 400 to reset and be in a set state.

It can be understood that when the external power supply 500 is supplying power normally, the second voltage detection circuit 600 sends a high level signal within the second set time period, and the controller 100 determines the external power supply 500 based on the high level signal. The power supply 500 supplies power normally, performs a reset operation on at least one valve body 400, and controls the opening of at least one valve body 400 to be in a set state after the reset operation is completed, waiting for the next valve body control instruction.

In an application example of the present application, a structural schematic diagram of an air conditioner is provided, as shown in FIG9. The outdoor unit of the air conditioner includes an outdoor heat exchanger, a gas-liquid separator, a compressor, a one-way valve, a four-way valve and other components. A refrigerant pipeline is arranged between the indoor unit and the outdoor unit of the air conditioner. An electric valve group 403 is arranged on the refrigerant pipeline branch. The electric valve group 403 includes an electric valve arranged on each refrigerant pipeline branch. The electric valve group 403 is used to control the refrigerant flow in the refrigerant pipeline branch. A first electric valve 404 and a second electric valve 405 are respectively arranged on the inlet side and the outlet side of the main circuit of the refrigerant pipeline. The first electric valve 404 and the second electric valve 405 are used to cut off the refrigerant flow in the refrigerant pipeline. It can be understood that based on the structural schematic diagram of the air conditioner shown in FIG11, after the controller 100 determines that the external power supply 500 is normally powered, the electric valve on the refrigerant pipeline of the air conditioner is reset.

Here, resetting the electric valves on the refrigerant pipeline of the air conditioner may include: the controller 100 controls the electric valves in the electric valve group 403 to reset and maintain the set openings in sequence, and after determining that the electric valve group 403 has completed the reset operation, controls the first electric valve 404 and the second electric valve 405 to reset and maintain the set openings.

Here, the resetting operation of the electric valves on the refrigerant pipeline of the air conditioner may also include: the controller 100 controls the first electric valve 404 and the second electric valve 405 to reset and maintain the set opening, and after determining that the first electric valve 404 and the second electric valve 405 have completed the reset operation, controls the electric valves in the electric valve group 403 to reset in sequence and maintain the set opening.

Preferably, the first electric valve 404 and the second electric valve 405 are reset and maintain the set opening, and the first electric valve 404 and the second electric valve 405 are closed to a fully closed state after being reset, and the refrigerant pipeline of the air conditioner is in a cut-off state to avoid refrigerant leakage. In an application example of the present application, a control method for normal power-on operation of a control device is provided, as shown in FIG10, including:

Step 1001, power on the air conditioner.

Here, the air conditioner is powered on means that the external power supply 500 supplies power normally and the output voltage can ensure that the air conditioner starts running.

Step 1002: The power supply circuit operates normally.

Here, the power circuit 300 successfully receives power from the external power supply 500 , and the power circuit 300 supplies power to the energy storage circuit 200 .

Step 1003: the energy storage circuit operates normally.

Here, the energy storage circuit 200 successfully receives power from the power supply circuit 300 , and the energy storage circuit 200 supplies power to the controller 100 .

Step 1004: The controller operates normally.

Here, the controller 100 successfully receives power from the energy storage circuit 200 , and the controller 100 controls the opening of at least one valve body 400 .

Step 905: the air conditioner operates normally.

Here, the normal operation of the air conditioner includes the normal operation of the control device, the valve body 400, the compressor, and the like. The air conditioner components such as the external DC fan are working normally.

Wherein, step 1003, the energy storage circuit works normally, specifically including:

Step 10031: The buck circuit charges the energy storage unit in a constant current charging mode.

Here, since the air conditioner is in the power-on startup stage and the remaining power of the energy storage unit 201 is small, the step-down circuit 202 charges the energy storage unit 201 in a constant current charging mode.

Step 10032, determine whether the first voltage value is equal to the first set voltage threshold, if yes, execute step 10033; if not, continue to execute step 10031.

Step 10033: The buck circuit charges the energy storage unit in a trickle charging mode.

In an application example of the present application, a control method for a control device when an external power supply suddenly loses power is provided, as shown in FIG11 , including:

Step 1101, the external power supply is turned off.

Here, the power failure of the external power supply 500 may be that the external power supply 500 suddenly loses power, or the power plug of the air conditioner suddenly falls off from the socket.

Step 1102, determine whether the power circuit is powered off.

Here, it can be determined that the power circuit 300 is powered off based on the failure to receive the first power detection information within the second set time. The first power detection information can be a low-level signal periodically sent by the second voltage detection circuit 600, and the second set time is greater than or equal to one cycle of the output voltage of the external power supply 500. The controller 100 determines that the power supply of the external power supply 500 is abnormal, and then determines that the power circuit 300 powered by the external power supply 500 is powered off.

Step 1103: the energy storage unit supplies power to the controller.

Here, since the power supply circuit 300 is powered off, the output voltage of the step-down circuit 202 will no longer be able to ensure the normal operation of the controller 100, and the energy storage unit 201 will no longer be charged. When the output voltage value of the step-down circuit 202 is lower than the voltage value of the energy storage unit 201, the energy storage unit 201 discharges and directly supplies power to the controller 100.

Step 1104, stop the compressor and the external DC fan.

Here, the controller 100 of the control device can control the start and stop of the compressor and the outdoor DC fan of the air conditioner in addition to controlling the opening of the valve body 400.

Step 1105, controlling the valve body to close to a fully closed state.

Step 1106, the controller is shut down and powered off.

Here, after the controller 100 determines that the valve bodies 400 are all in the fully closed state, it is determined that all the shutdown steps have been executed, and the controller 100 shuts down and cuts off the power.

Here, timing can be started from the time when the controller 100 controls the valve body 400 to close. After reaching a first set time, the controller 100 determines that all valve bodies 400 are in a fully closed state, wherein the first set time is greater than or equal to the time required for the controller 100 to control at least one valve body 400 from a fully open state to a fully closed state.

It can be understood that any step of the control method of the control device in the aforementioned embodiment of the present application can be implemented by configuring the program of the controller 100 of the control device.

The embodiment of the present application also provides an electronic device, which is an air conditioner. The device includes at least one valve body 400 and the aforementioned control device of the embodiment of the present application. In this way, the electronic device can, under the premise that the controller 100 has not received an external shutdown command, determine that the output voltage of the step-down circuit 201 will not be able to guarantee the normal operation of the controller 100 by determining that the power circuit 300 is powered off, and the controller 100 executes the shutdown step to control the valve body 400 to close to a fully closed state, effectively avoiding the controller 100 being unable to control the opening of the valve body 400 due to a sudden power failure of the external power supply 500, thereby eliminating the leakage of flammable refrigerant through the valve body through the leak point into the surrounding environment of the air conditioner when there is a leak point in the air conditioner indoor unit, thereby improving the safety and reliability of the air conditioner.

In an exemplary embodiment, the present application embodiment further provides a storage medium, namely a computer storage medium, which can be a computer-readable storage medium, for example, a memory including a computer program, and the aforementioned computer program can be executed by a microprocessor of a control device to complete the steps described in the method of the present application embodiment. The computer-readable storage medium can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a ferromagnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a disk memory or a tape memory.

It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (16)

A control device for an air conditioner, wherein at least one valve body is arranged on a refrigerant pipeline of the air conditioner, and the control device comprises: A controller configured to control the movement of the at least one valve body and supply power to the at least one valve body; An energy storage circuit is used to supply power to the controller; the output end of the energy storage circuit is connected to the power supply end of the controller; A power supply circuit, used to convert and process the external power supply and supply power to the energy storage circuit; the output end of the power supply circuit is connected to the power supply end of the energy storage circuit; When the power supply circuit supplies power to the energy storage circuit, the energy storage circuit is used to store the electric energy output by the power supply circuit and perform filtering and voltage stabilization processing on the output power of the power supply circuit. The control device according to claim 1, wherein the energy storage circuit comprises: an energy storage unit, used to store the electric energy output by the power circuit and supply power to the controller when the power circuit is powered off; A step-down circuit is used to step down the output voltage of the power supply circuit, charge the energy storage unit and supply power to the controller. The control device according to claim 2, wherein the energy storage circuit further comprises: a first voltage detection circuit, configured to detect an output voltage of the step-down circuit, obtain a first voltage value, compare the first voltage value with a first set voltage threshold, and send a first comparison result to the step-down circuit, wherein the step-down circuit controls a charging mode of the energy storage unit based on the first comparison result; Wherein, the charging modes include: constant current charging mode and trickle charging mode. The control device according to claim 1, wherein the control device further comprises: The second voltage detection circuit is used to detect the power supply status of the external power supply and generate a table The controller collects first power supply detection information indicating that the external power supply is normally powered, and sends the first power supply detection information to the controller. The control device according to claim 2, wherein the energy storage unit is further used to supply power to the controller within a first set time period when the power circuit is powered off; Wherein, the first set time length is greater than or equal to the time length required for the controller to control the at least one valve body from a fully open state to a fully closed state. The control device according to claim 5, wherein the energy storage unit is configured such that: when the power circuit is powered off, the output voltage value of the energy storage unit is greater than or equal to a second set voltage threshold within the first set time period; The second set voltage threshold is the lower limit of the operating voltage allowed by the controller. The control device according to claim 1, wherein the energy storage circuit and the controller are arranged on the same substrate. The control device according to claim 1, wherein the control device is arranged on a main control board of an outdoor unit of the air conditioner. The control device according to claim 2, wherein the energy storage unit comprises: an electrolytic capacitor. A control method for the control device of an air conditioner according to any one of claims 1 to 9, comprising: Determining that the power circuit is de-energized; Control the at least one valve body to close to a fully closed state. The method according to claim 10, further comprising: After controlling the at least one valve body to be closed for a first set time, the controller shuts down and cuts off power; Wherein, the first set time length is greater than or equal to the time length required for the controller to control the at least one valve body from a fully open state to a fully closed state. The method according to claim 10, wherein the determining that the power circuit is powered off comprises: If the first power supply detection information is not received within a second set time period, it is determined that the power supply circuit is powered off; The first power supply detection information is generated by the second voltage detection circuit of the control device and is used to indicate that the external power supply is normal. The method according to claim 10, further comprising: receiving first power supply detection information within a second set time period, and determining that the external power supply is supplying power normally; Controlling the at least one valve body to be reset and in a set state; The first power supply detection information is generated by the second voltage detection circuit of the control device and is used to indicate that the external power supply is normal. A control device for an air conditioner as claimed in any one of claims 1 to 9, wherein the controller is configured to execute the steps of the method as claimed in any one of claims 10 to 13. An electronic device, which is an air conditioner, comprises: at least one valve body and the control device as claimed in claim 14. A storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method according to any one of claims 10 to 13 are implemented.