Control device, health state detection method and equipment thereof and storage medium

Abstract

The invention discloses a control device, a health state detection method and equipment thereof and a storage medium. The control device comprises a controller, an energy storage module and a power supply circuit. The controller is used for controlling one valve body to act and supplying power to the other valve body; the energy storage module is used for supplying power to the controller when the external power supply is powered off; the power supply circuit is used for converting an external power supply and then supplying power to the controller and the energy storage module; the energy storage module comprises a capacitor, and the controller is used for detecting the health state of the capacitor. The health state of the capacitor is detected based on the controller, the air conditioner prompts a user to replace the capacitor about to reach the cycle life in time, and the emergency power supply requirement of the control device is ensured when the external power supply is powered off; the energy storage module is integrally designed, a user can replace the energy storage module by himself / herself, and time and cost for preventive maintenance of the air conditioner are saved.

Description

Technical Field

[0001] This application relates to the field of air conditioners, and in particular, to a control device, a health status detection method, a device, and a storage medium thereof. Background Art

[0002] An electric valve is usually used in an air conditioner. By sending a pulse signal or turning the power supply on and off, the opening degree of the electric valve, the truncation and opening of the flow path are controlled. Before the air conditioner stops running, the electric valve will be controlled to be in a set state. When the external power supply of the air conditioner suddenly cuts off, the controller of the air conditioner no longer controls the electric valve, and the electric valve maintains the opening state before power-off until the next power-on. If there is a leak in the indoor unit of the air conditioner, since the electric valve maintains the current opening state, the refrigerant in the refrigerant pipeline will leak into the surrounding environment of the air conditioner through the electric valve, and some types of refrigerants are flammable, posing a safety hazard.

[0003] In related technologies, an energy storage unit is usually set in the control device of the air conditioner to provide an emergency power supply when the external power supply cuts off, so that the controller can control the electric valve to close. However, the actual capacity of the energy storage unit will gradually decay as the energy storage unit ages. Therefore, there is a problem that the actual capacity of the energy storage unit cannot meet the emergency power supply requirements of the control device during the service life of the air conditioner. Summary of the Invention

[0004] In view of this, the embodiments of this application provide a control device, a health status detection method, a device, and a storage medium thereof, aiming to improve the reliability of the power-off valve closing function of the air conditioner and the safety of the air conditioner.

[0005] The technical solution of the embodiments of this application is implemented as follows:

[0006] In a first aspect, the embodiments of this application provide a control device. The control device is applied to an air conditioner, and at least one valve body is arranged on the refrigerant pipeline of the air conditioner. The control device includes:

[0007] A controller, configured to control the at least one valve body to act and supply power to the at least one valve body;

[0008] An energy storage module, configured to supply power to the controller when the external power supply cuts off;

[0009] A power supply circuit, configured to convert and process the external power supply and supply power to the controller and the energy storage module;

[0010] Wherein,

[0011] The energy storage module includes:

[0012] A capacitor, configured to store electric energy and discharge when the external power supply cuts off;

[0013] The controller is further configured to detect the health state of the capacitor.

[0014] In some embodiments, the energy storage module further includes:

[0015] A charging circuit for converting and processing the output power of the power supply circuit and supplying power to the capacitor;

[0016] A discharging circuit for converting and processing the output power of the capacitor and supplying power to the controller when the capacitor discharges;

[0017] A fast-discharging circuit for releasing the electrical energy stored in the capacitor when the controller is in a shutdown state.

[0018] In some embodiments, the main control board and / or the terminal interface board of the air conditioner are provided with a first interface for installing the energy storage module, and the energy storage module is integrally installed or disassembled based on the first interface.

[0019] In some embodiments, the energy storage module further includes:

[0020] A voltage detection circuit for detecting the voltage across the capacitor, obtaining a first voltage value, comparing the first voltage value with a set voltage threshold, and sending a first comparison result to the charging circuit; the charging circuit controls the charging mode of the capacitor based on the first comparison result;

[0021] Wherein, the charging mode includes: a constant current charging mode and a trickle charging mode.

[0022] In some embodiments, the charging circuit is further configured to determine that the first voltage value reaches the set voltage threshold based on the first comparison result, control the charging mode of the capacitor to switch to the trickle charging mode, and send a first message to the controller.

[0023] In a second aspect, an embodiment of the present application provides a method for detecting the health state of a control device as described in the first aspect of the embodiments of the present application, the method including:

[0024] Obtaining a first charging duration, and comparing the first charging duration with a set charging duration threshold;

[0025] Updating a first statistical result based on the comparison result of the comparison;

[0026] If it is determined that the first statistical result is greater than or equal to a set value, generating a warning message, the warning message being used to indicate that the energy storage module needs to be replaced;

[0027] Wherein, the first charging duration is the duration required for the power supply circuit to supply power to the energy storage module when the air conditioner is powered on, so that the voltage across the capacitor reaches the set voltage threshold;

[0028] The warning information indicates that the capacitance attenuation of the capacitor reaches the set threshold.

[0029] In some embodiments, the obtaining and recording the first charging duration includes:

[0030] Start timing based on the power-on start instruction;

[0031] Stop timing based on the first information and obtain the first charging duration;

[0032] Wherein, the first information is generated by the energy storage module.

[0033] In some embodiments, the updating the first statistical result based on the comparison result of the comparison includes:

[0034] If it is determined that the first charging duration is less than the set charging duration threshold, the first statistical result is incremented by one;

[0035] If it is determined that the first charging duration is greater than or equal to the set charging duration threshold, the first statistical result is cleared.

[0036] In some embodiments, after generating the warning information, the method further includes:

[0037] After determining that the energy storage module is replaced, clear the first statistical result.

[0038] In some embodiments, the method further includes:

[0039] If it is determined that the first statistical result is less than the set value, control the air conditioner to continue running.

[0040] In a third aspect, an embodiment of the present application provides a control device as described in one aspect of the embodiments of the present application, and the controller is configured to execute the steps of the method described in the second aspect of the embodiments of the present application.

[0041] In a fourth aspect, an embodiment of the present application provides an electronic device, and the electronic device is an air conditioner, including: at least one valve body, a first interface, and a control device as described in the third aspect, wherein the first interface is used to install the energy storage module of the control device.

[0042] In a fifth aspect, an embodiment of the present application provides a storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the method described in the second aspect of the embodiments of the present application are implemented.

[0043] The control device of the air conditioner provided by the embodiment of the present application includes a controller, an energy storage module, and a power supply circuit. Among them, the energy storage module includes a capacitor, and the controller detects the health state of the capacitor. Based on the detection of the health state of the capacitor by the controller, the air conditioner can prompt the user to replace the capacitor that is about to reach the cycle life in time, ensuring the emergency power supply demand of the control device when the external power supply is cut off. Description of the Drawings

[0044] Figure 1 It is a schematic structural diagram of the control device of the air conditioner according to an embodiment of the present application;

[0045] Figure 2 It is a schematic structural diagram of the air conditioner in an application example of the present application;

[0046] Figure 3 It is a schematic structural diagram of the control device according to another embodiment of the present application;

[0047] Figure 4 It is a schematic circuit diagram of the energy storage module in an application example of the present application;

[0048] Figure 5 It is a schematic structural diagram of the control device in an application example of the present application;

[0049] Figure 6 It is a schematic structural diagram of the control device in another application example of the present application;

[0050] Figure 7A It is a schematic structural diagram of the main control board of the air conditioner in an application example of the present application;

[0051] Figure 7B It is a schematic structural diagram of the main control board of the air conditioner in another application example of the present application;

[0052] Figure 8A It is a schematic structural diagram of the air conditioner in another application example of the present application;

[0053] Figure 8B It is a schematic structural diagram of the interior of the air conditioner in an application example of the present application;

[0054] Figure 9A It is a schematic structural diagram of the air conditioner in yet another application example of the present application;

[0055] Figure 9B It is a schematic structural diagram of the interior of the air conditioner in another application example of the present application;

[0056] Figure 10 It is a schematic structural diagram of the control device in yet another application example of the present application;

[0057] Figure 11Schematic flowchart of the health status detection method for the control device according to an embodiment of the present application;

[0058] Figure 12 Schematic flowchart of the health status detection method for the control device in an application example of the present application. Detailed implementation manners

[0059] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0061] An embodiment of the present application provides a control device. As Figure 1 shown, the control device is applied to an air conditioner. At least one valve body 400 is provided on the refrigerant pipeline of the air conditioner. The control device includes: a controller 100, an energy storage module 200, and a power supply circuit 300. The controller 100 is used to control the operation of at least one valve body 400 and supply power to at least one valve body 400. The energy storage module 200 is used to supply power to the controller 100 when the external power supply 500 is powered off. The power supply circuit 300 is used to convert and process the external power supply 500 and supply power to the controller 100 and the energy storage module 200. The energy storage module 200 includes a capacitor 201, and the capacitor 201 is used to store the electric energy output by the power supply circuit 300 and discharge when the external power supply 500 is powered off. The controller 100 is further used to detect the health status of the capacitor 201.

[0062] Here, the refrigerant is used to transfer heat energy in the air conditioner to produce a refrigeration or heating effect; the refrigerant pipeline connects the indoor unit and the outdoor unit 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 degree to produce different refrigeration or heating effects.

[0063] Among them, the valve body 400 may be an electric valve, and 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 can be determined according to the number of refrigerant pipelines.

[0064] In addition, the air conditioner may also be provided with two valve bodies 400 on the main return pipeline of the refrigerant pipeline. When the controller 100 controls the two valve bodies 400 to be closed to the fully closed state, all the refrigerant pipelines are in a cut-off state.

[0065] In an application example of the present application, a structural schematic diagram of an air conditioner is provided. As Figure 2As shown in the figure. The outdoor unit of the air conditioner includes components such as an outdoor heat exchanger, a gas-liquid separator, a compressor, a check valve, and a four-way valve. A refrigerant pipeline is provided between the indoor unit and the outdoor unit of the air conditioner. An electric valve is provided on each branch of the refrigerant pipeline to control the refrigerant flow in the branch of the refrigerant pipeline. An electric valve is provided on the inlet side and the outlet side of the main circuit of the refrigerant pipeline to cut off the refrigerant flow in the refrigerant pipeline.

[0066] It can be understood that the controller 100 controls all the electric valves on the branch of the refrigerant pipeline to be closed to the fully closed state, or controls the two electric valves on the main circuit of the refrigerant pipeline to be closed to the fully closed state, both of which can achieve that all the refrigerant pipelines are in the cut-off state.

[0067] It should be noted that when the controller 100 of the air conditioner receives an external shutdown instruction, the controller 100 will perform sequential shutdown of the various working components of the air conditioner according to the set shutdown steps. When all the shutdown steps are completed, the controller 100 performs a power-off step. At this time, the air conditioner loses the control power supply and is in the shutdown and power-off state.

[0068] Among them, the set shutdown steps include the controller 100 controlling the valve body 400 to be in the set state.

[0069] It should be noted that in the related art, an energy storage unit is usually provided in the control device of the air conditioner to provide an emergency power supply when the external power supply is cut off. If the control device does not have an energy storage unit, when the external power supply of the air conditioner is suddenly cut off, the controller loses the input power supply and cannot perform the shutdown steps before power-off. The controller no longer controls the valve body opening, and the valve body remains in the opening state before power-off until the next power-on. If there is a leak in the indoor unit of the air conditioner, since the valve body remains in the current opening state, the refrigerant in the refrigerant pipeline will leak through the leak point and through the valve body into the surrounding environment where the air conditioner is located, posing a safety hazard; when the refrigerant is flammable, an explosion may even occur.

[0070] It can be understood that in the related art, based on the provision of an energy storage unit in the control device, an emergency power supply can be provided when the external power supply is cut off, so that the controller can control the electric valve to close.

[0071] It should be noted that in the related art, the actual capacity of the energy storage unit will gradually decay with the aging of the energy storage unit. Therefore, there is a problem that the actual capacity of the energy storage unit cannot meet the emergency power supply requirements of the control device during the service life of the air conditioner. Users cannot know that due to the capacity decay of the energy storage unit, the air conditioner can no longer achieve the function of automatically closing the valve when the external power supply is cut off. And when the user needs to replace the energy storage unit that has reached the cycle life, if the energy storage unit is set on the main control board of the air conditioner, the user needs to replace the entire main control board, resulting in waste of resources.

[0072] Exemplarily, the air conditioner is provided with a first interface for installing the energy storage module 200, and the energy storage module 200 is integrally installed or disassembled based on the first interface.

[0073] It can be understood that the energy storage module 200 of the embodiment of the present application adopts an integral design. When the air conditioner is provided with a first interface for installing the energy storage module 200, the energy storage module 200 can be integrally installed or disassembled based on the first interface, and the user can replace the energy storage module 200 by himself, saving the time and cost of preventive maintenance of the air conditioner; and the controller 100 detects the health state of the capacitor 201, and the air conditioner can prompt the user to replace the capacitor 201 that is about to reach the cycle life in time, ensuring the emergency power supply demand of the control device when the external power supply 500 is powered off, and improving the reliability of the power-off valve closing function of the air conditioner and the safety of the air conditioner.

[0074] Preferably, the capacitor 201 is preferably a supercapacitor.

[0075] Here, the supercapacitor is an electrochemical device that can quickly store and supply high-power electricity and has a high cycle life, with higher energy density and lower voltage limit. Selecting a supercapacitor as the energy storage unit of the control device is beneficial to reducing the volume of the energy storage module 200 and facilitating the integral design of the energy storage module 200.

[0076] In addition, the health state (State of Health, abbreviated as SOH) of the capacitor 201 mainly includes two main indicators: capacity attenuation and equivalent DC internal resistance. Among them, capacity attenuation represents the ratio of the current actual capacity of the capacitor 201 to the chargeable amount at the time of factory, and as the capacitor 201 ages, the ratio of the current actual capacity of the capacitor 201 to the chargeable amount at the time of factory will gradually decrease; the equivalent DC resistance of the capacitor 201 will gradually increase as the capacitor 201 ages, so as the usage time of the capacitor 201 increases, the temperature rise of the capacitor 201 during the charge and discharge process gradually increases.

[0077] It should be noted that the controller 100 of the embodiment of the present application detects the capacity attenuation of the capacitor 201. When it is detected that the capacitor 201 is about to reach the cycle life and the actual capacity cannot ensure the emergency power supply demand of the control device, the controller 100 issues a warning to the user, prompting the user to replace the capacitor 201.

[0078] In an 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 the high-order harmonics in the direct current output by the rectifier circuit; the switching power supply circuit is used to adjust the output voltage of the filter circuit to the working voltage of the controller 100.

[0079] Exemplarily, such asFigure 3 As shown, the energy storage module 200 further includes a charging circuit 202 and a discharging circuit 203. The charging circuit 202 is used to convert and process the output power of the power supply circuit 300 and supply power to the capacitor 201; the discharging circuit 203 is used to convert and process the output power of the capacitor 201 when the capacitor 201 discharges and supply power to the controller 100.

[0080] It can be understood that when the external power supply 500 supplies power normally, the charging circuit 202 operates normally and the discharging circuit 203 is in an open state; when the external power supply 500 is powered off, the charging circuit 202 is in an open state and the discharging circuit 203 operates normally.

[0081] Preferably, the charging circuit 202 can be a buck circuit, and the discharging circuit 203 can be a boost circuit.

[0082] It can be understood that by setting the charging circuit 202 as a buck circuit, the advantage of the large energy density of the capacitor 201 can be fully utilized, the rated voltage of the capacitor 201 can be reduced, the volume of the capacitor 201 can be reduced, which is beneficial to the overall design of the energy storage module 200.

[0083] In an application example of the present application, the main power topology circuit of the energy storage module 200 is provided, as Figure 4 shown, wherein, the charging circuit 202 is a buck circuit, and the discharging circuit 203 is a boost circuit; the energy storage module 200 is grounded through capacitors C1 - C3, inductors L41 and L42 play a role in energy storage and filtering, terminals VIN1 and VIN2 are connected in parallel with the power supply circuit 300, the terminal VOUT is connected to the capacitor 201, and the boost and buck functions of the energy storage module 200 are realized by controlling the conduction and disconnection of the field effect transistors Q41 - Q44.

[0084] Exemplarily, as Figure 5 shown, the energy storage module 200 further includes a fast - discharge circuit 204. The fast - discharge circuit 204 is used to release the electric energy stored in the capacitor 201 when the controller 100 is in a shutdown state.

[0085] It should be noted that when the controller 100 is in a shutdown state, at this time the air conditioner stops running, the power supply circuit 300 no longer supplies power to the energy storage module 200, and the energy storage module 200 no longer supplies power to the controller 100. The fast - discharge circuit 204 is directly connected across the capacitor 201. At this time, the electric energy stored in the capacitor 201 is quickly released through the fast - discharge circuit 204. When the air conditioner is powered on and started next time, the power supply circuit 300 re - charges the energy storage module 200.

[0086] It can be understood that the capacitor 201 releases electrical energy through the fast discharge circuit 204 to deplete the stored electrical energy as much as possible. When the air conditioner is powered on and started next time, the power supply circuit 300 recharges the energy storage module 200. The controller 100 can judge the current actual capacity of the capacitor 201 according to the charging duration of the capacitor 201 each time, and then indirectly judge the health state of the capacitor 201. And when the user disassembles the energy storage module 200, it effectively avoids the capacitor 201 discharging to the human body and improves the safety of the replacement operation of the energy storage module 200.

[0087] In an application example of the present application, a schematic structural diagram of a control device energy storage module 200 is provided, as Figure 6 shown. Among them, the fast discharge circuit 204 may include a large-value resistor R1 and a normally closed switch K1, and the normally closed switch K1 is controlled by the controller 100. When the controller 100 is in the operating state, the controller 100 controls the normally closed switch K1 to disconnect. At this time, the capacitor 201 is in the charging or discharging state. When the controller 100 is in the shutdown state, the normally closed switch K1 returns to the closed state, and at this time the capacitor 201 discharges to the large-value resistor R1.

[0088] In an application example of the present application, the fast discharge circuit 204 may only include a large-value resistor R1. When the power supply circuit 300 charges the energy storage module 200, since the resistance value of the large-value resistor R1 is much larger than the internal resistance of the capacitor 201, at this time the fast discharge circuit 204 is equivalent to an open circuit and does not affect the charging circuit 202 from charging the capacitor 201. When the energy storage module 200 supplies power to the controller 100, since the resistance value of the large-value resistor R1 is much larger than the resistance value of the controller 100, at this time the fast discharge circuit 204 is equivalent to an open circuit and does not affect the discharge circuit 203 from supplying power to the controller 100. When the controller 100 is in the shutdown state, the air conditioner loses the control power supply. At this time, the charging circuit 202 and the discharge circuit 203 no longer operate, and the capacitor 201 can only discharge through the large-value resistor R1.

[0089] It can be understood that the larger the resistance value of the large-value resistor R1, the higher the discharge efficiency of the capacitor 201.

[0090] Exemplarily, the air conditioner includes a main control board 600 and a terminal interface board 700, and a first interface is provided on the main control board 600 and / or the terminal interface board 700 of the air conditioner.

[0091] Here, the controller 100 and the power supply circuit 300 are arranged on the main control board 600 of the air conditioner.

[0092] It should be noted that the first interface can also be an electrical interface. In addition to being installed and fixed on the main control board 600 or the terminal interface board 700 of the air conditioner based on the first interface, the energy storage module 200 can also be electrically connected to the controller 100 and the power supply circuit 300 based on the first interface.

[0093] In an application example of the present application, a schematic structural diagram of a main control board 600 of an air conditioner is provided, wherein, Figure 7A A schematic structural diagram showing an energy storage module 200 installed on the main control board 600 based on a first interface is shown. Figure 7B A schematic structural diagram showing the removal of the energy storage module 200 from the main control board is shown.

[0094] It can be understood that a first interface is provided on the main control board 600 of the air conditioner, and the energy storage module 200 is integrally encapsulated. The user can install the energy storage module 200 on the main control board 600 or remove it from the main control board 600 according to needs. The energy storage module 200 is directly installed on the main control board 600, which facilitates the realization of the electrical connection between the energy storage module 200, the power supply circuit 300, and the controller 100, and is beneficial to the wiring design of the main control board 600.

[0095] In an application example of the present application, a schematic structural diagram of an air conditioner is provided, as Figure 8A shown, wherein the air conditioner is provided with a front panel 800, and the user can open the front panel 800 of the air conditioner by himself. Figure 8B A schematic structural diagram of the interior of the air conditioner with the front panel 800 opened is shown, wherein the main control board 600 of the air conditioner is arranged in an obvious manner, and the main control board 600 is arranged inside the air conditioner opposite to the front panel 800. After the user opens the front panel 800, the energy storage module 200 on the main control board 600 can be directly replaced.

[0096] In an application example of the present application, a schematic structural diagram of an air conditioner is provided, as Figure 9A shown. The air conditioner is provided with a maintenance panel 900, and an invisible handle 901 is provided on the maintenance panel. The user can open the maintenance panel 900 by himself based on the invisible handle 901. Figure 9B A schematic structural diagram of the interior of the air conditioner with the maintenance panel 900 opened is shown, wherein the terminal interface board 700 of the air conditioner is sealed based on the maintenance panel 900, and a first interface is provided on the terminal interface board 700. After the user opens the maintenance panel 900, the energy storage module 200 can be installed on the terminal interface board 700 or removed from the terminal interface board 700 according to needs.

[0097] It can be understood that whether the energy storage module 200 is directly installed on the main control board 600 or installed on the terminal interface board 700 and connected to the main control board 600 through a wiring terminal, the controller 100 and the power supply circuit 300 can be connected.

[0098] Exemplarily, as Figure 10As shown, the energy storage module 200 further includes a voltage detection circuit 205. The voltage detection circuit 205 is used to detect the voltage across the capacitor 201, obtain a first voltage value, compare the first voltage value with a set voltage threshold, and send a first comparison result to the charging circuit 202. The charging circuit 202 controls the charging mode of the capacitor 201 based on the first comparison result. Among them, the charging mode includes: constant current charging mode and trickle charging mode.

[0099] It should be noted that due to the large energy density of the capacitor 201, the voltage of the capacitor 201 changes slowly during the charging process, and the voltage detection circuit 205 cannot quickly provide voltage feedback during the charging start process. Moreover, if the charging circuit 202 uses a constant voltage charging mode to charge the capacitor 201, it is easy to have a situation where the charging current of the capacitor 201 is too large to exceed the power supply capacity of the power supply circuit 300, thereby pulling down the output voltage of the power supply circuit 300 and affecting the normal operation of the controller 100. Considering the foregoing situation, in the embodiment of the present application, the charging circuit 202 needs to control the charging current of the capacitor 201 to be constant and not exceed the power supply capacity range of the power supply circuit 300.

[0100] Here, the charging circuit 202 further includes a current sampling feedback circuit. The current sampling feedback circuit is used to collect the output current value of the charging circuit 202 and feedback the collected current value to the charging circuit 202. The charging circuit 202 determines whether the charging current of the charging circuit 202 is constant and does not exceed the power supply capacity range of the power supply circuit 300 based on the feedback collected current value.

[0101] It can be understood that the charging mode of the capacitor 201 includes a constant current charging mode and a trickle charging mode. In the constant current charging mode, the charging circuit 202 charges the capacitor 201 with a constant preset charging current. As the charging process progresses, the current stored power of the capacitor 201 gradually increases, and the charging voltage output by the charging circuit 202 also gradually increases; when the output voltage of the charging circuit 202 is equal to the target charging voltage of the capacitor 201 (i.e., the set voltage threshold), the charging circuit 202 cannot maintain the constancy of the charging current by increasing the output voltage. At this time, the charging circuit 202 uses the trickle charging mode to charge the capacitor 201. In the trickle charging mode, the charging circuit 202 charges the capacitor 201 with a small current at a constant voltage to make up for the power loss of the capacitor 201 due to self-discharge.

[0102] Here, considering that the capacitor 201 needs to reserve sufficient withstand voltage derating, the set voltage threshold should be less than the allowable charging voltage of the capacitor 201 at the current temperature.

[0103] Among them, the allowable charging voltage of the capacitor 201 can be a uniquely determined value. The average temperature of the surrounding environment where the air conditioner is located can be combined. For example, when the average temperature is 25°C, the allowable charging voltage of the capacitor 201 is determined, and the set voltage threshold should be less than the allowable charging voltage of the capacitor 201 under the average ambient temperature.

[0104] It should be noted that the voltage detection circuit 205 includes a comparator. The comparator is used to compare the first voltage value with the set voltage threshold and generate a first comparison result to be sent to the charging circuit 202. The charging circuit 202 controls the charging mode of the capacitor 201 based on the first comparison result.

[0105] Exemplarily, the charging circuit 202 is further configured to determine that the first voltage value reaches the set voltage threshold based on the first comparison result, control the charging mode of the capacitor 201 to switch to the trickle charging mode, and send a first message to the controller 100.

[0106] It should be noted that as the capacitor 201 ages, the capacitance of the capacitor 201 will decay, that is, the ratio of the current actual capacitance of the capacitor 201 to the chargeable amount of electricity when the capacitor 201 leaves the factory gradually decreases. However, the capacitance decay of the capacitor 201 only affects the current chargeable capacitance of the capacitor 201 and does not affect the charging and discharging voltage range of the capacitor 201, that is, the health state of the capacitor 201 does not affect the charging and discharging characteristic curve of the capacitor 201.

[0107] It can be understood that when the output voltage of the charging circuit 202 reaches the set voltage threshold, the voltage of the capacitor 201 at this time is a determined value, that is, the state of charge (SOC) of the capacitor 201 is a determined value. Among them, SOC represents the ratio of the remaining charge of the capacitor 201 to the current chargeable amount of electricity. For example, based on the determination of the set voltage threshold, when the output voltage of the charging circuit 202 reaches the set voltage threshold, the SOC of the capacitor 201 is 90%. Even as the capacitor 201 ages and the capacitor 201 has a capacitance decay, when the output voltage of the charging circuit 202 reaches the set voltage threshold, the SOC of the capacitor 201 is still 90%.

[0108] It can be understood that when the charging circuit 202 determines that the first voltage value reaches the set voltage threshold based on the first comparison result, controls the charging mode of the capacitor 201 to switch to the trickle charging mode, and sends a first message to the controller 100, the controller 100 can determine that the SOC of the capacitor 201 reaches a determined value based on the first message.

[0109] The embodiment of the present application further provides a health state detection method based on the foregoing control device, as Figure 11 shown. This method includes:

[0110] Step 1101: Obtain the first charging duration and compare the first charging duration with a set charging duration threshold.

[0111] Step 1102: Update the first statistical result based on the comparison result of the comparison.

[0112] Step 1103: If it is determined that the first statistical result is greater than or equal to a set value, generate a warning message.

[0113] Among them, the first charging duration is the duration required for the power supply circuit 300 to supply power to the energy storage module 200 when the air conditioner is powered on, so that the voltage across the capacitor 201 reaches the set voltage threshold. The warning message indicates that the capacity attenuation of the capacitor 201 has reached the set threshold.

[0114] It can be understood that when the external power supply 500 is powered off, the energy storage module 200 supplies power to the controller 100, and the power supplied by the energy storage module 200 to the controller 100 should at least ensure that the controller 100 controls at least one valve body 400 to close to the fully closed state. When the current actual capacity of the capacitor 201 decays to the point where it can no longer guarantee the power required for the controller 100 to control at least one valve body 400 to close to the fully closed state, a warning message needs to be sent to the user.

[0115] It can be understood that the user can choose to replace the energy storage module 200 based on the received warning message.

[0116] It should be noted that the energy storage module 200 includes a fast discharge circuit 204. When the controller 100 is in a power-off state, the electric energy stored in the capacitor 201 is quickly released through the fast discharge circuit 204. After being quickly released through the fast discharge circuit 204, the electric energy stored in the capacitor 201 is exhausted. When the air conditioner is powered on and started next time, the power supply circuit 300 recharges the energy storage module 200.

[0117] It should be noted that when the air conditioner is powered on and started, the electric energy stored in the capacitor 201 has been exhausted, and the power supply circuit 300 charges the capacitor 201 through the charging circuit 202. During the first charging duration, the charging current of the capacitor 201 is a constant current. Therefore, the first charging duration can directly reflect the situation of the electric energy stored (i.e., the remaining electric energy) in the capacitor 201 when the voltage across the capacitor 201 reaches the set voltage threshold.

[0118] It can be understood that the capacity attenuation of the capacitor 201 does not affect the charging and discharging voltage range of the capacitor 201. When the voltage across the capacitor 201 reaches the set voltage threshold, the SOC of the capacitor 201 at this time is a definite value, that is, the ratio of the remaining power of the capacitor 201 to the current actual capacity is certain. Since the first charging duration can directly reflect the remaining power of the capacitor, the controller 100 can indirectly determine the current actual capacity of the capacitor 201 by detecting the first charging duration, and then determine the capacity attenuation of the capacitor 201.

[0119] Here, the set charging duration threshold can be determined based on the charging and discharging curve of the capacitor 201 and the ambient temperature during the operation of the air conditioner, or can be determined according to the average value of the first charging duration of the capacitor 201 of the control device detected.

[0120] For example, based on the power required for the controller 100 to control at least one valve body 400 to close to the fully closed state and the power that can be stored when the capacitor 201 leaves the factory, when it is determined that the ratio of the current actual capacity of the capacitor 201 to the power that can be stored when the capacitor 201 leaves the factory is greater than or equal to 80%, the capacitor 201 can ensure the emergency power supply demand of the control device when the external power supply 500 is powered off. Then the set charging duration threshold t1 can be obtained according to the following formula:

[0121] t1 = 80% × t T0 / I0 ;

[0122] where, t T0 / I0 is the constant current charging duration of the capacitor 201 when the ambient temperature during the operation of the air conditioner is T0 and the preset charging current is I0, and t T0 / I0 can be obtained according to the technical specification provided by the manufacturer of the capacitor 201.

[0123] In addition, the set charging duration threshold t1 can also be obtained according to the following formula:

[0124]

[0125] where, t0 is the detection value of the first charging duration of the capacitor 201 of the control device for the first N1 times.

[0126] It can be understood that considering the change of the ambient temperature during the operation of the air conditioner, the set charging duration threshold t1 can also be determined according to the average value of the first charging duration of the capacitor 201 of the control device detected for the first N1 times.

[0127] Here, the embodiments of the present application provide two methods for determining the set charging duration threshold, and the embodiments of the present application do not make specific limitations on the method for determining the set charging duration threshold.

[0128] It can be understood that, based on comparing the first charging duration with a set charging duration threshold, the number of times the first charging duration is less than the set charging duration threshold is determined and counted, and a first statistical result is generated. When the first statistical result is greater than or equal to a set value, it is considered that the capacitance of capacitor 201 has decayed to the point where it can no longer guarantee the power required to control at least one valve body 400 to close to the fully closed state by the controller 100, and a warning message is sent to the user indicating that the user needs to replace the energy storage module 200.

[0129] It can be understood that the controller 100 of the embodiment of the present application detects the health status of the capacitor 201, and the air conditioner can prompt the user to replace the capacitor 201 that is about to reach the cycle life in time, ensure the emergency power supply demand of the control device when the external power supply 500 is powered off, and improve the reliability of the power-off valve closing function of the air conditioner and the safety of the air conditioner.

[0130] Exemplarily, obtaining and recording the first charging duration includes:

[0131] Start timing based on the power-on startup instruction.

[0132] Stop timing based on the first information and obtain the first charging duration.

[0133] Wherein, the first information is generated by the energy storage module.

[0134] Here, the first information is generated by the charging circuit 202 of the energy storage module 200.

[0135] It can be understood that when the voltage across the capacitor 201 reaches the set voltage threshold, the charging mode of the capacitor 201 switches to the trickle charging mode, and the charging circuit 202 sends the first information indicating the end of the constant current charging mode of the capacitor 201 to the controller 100. After receiving the first information, the controller 100 determines that the constant current charging mode of the capacitor 201 ends, and the SOC of the capacitor 201 reaches a determined value, and the first charging duration is obtained.

[0136] Exemplarily, based on the comparison result of the comparison, updating the first statistical result includes:

[0137] If it is determined that the first charging duration is less than the set charging duration threshold, the first statistical result is incremented by one.

[0138] If it is determined that the first charging duration is greater than or equal to the set charging duration threshold, the first statistical result is cleared.

[0139] It should be noted that the first charging duration is related not only to the capacity attenuation of the capacitor 201, but also to factors such as the ambient temperature during the operation of the air conditioner. When the first charging duration is less than the set charging duration threshold, it is considered that the current storable capacity of the capacitor 201 cannot meet the emergency power supply requirement of the control device when the external power supply 500 is powered off. The controller 100 records this comparison result, and the first statistical result is incremented by one; if the controller 100 subsequently obtains a comparison result that the first charging duration is greater than or equal to the set charging duration threshold, considering the influencing factors such as the ambient temperature during the operation of the air conditioner, it is considered that there was a misjudgment of the current actual capacity of the capacitor 201 before. The controller 100 clears the first statistical result and continues to re - count.

[0140] It can be understood that the embodiments of the present application indirectly judge the current storable capacity of the capacitor 201 based on detecting the first charging duration, which will be affected by factors such as the ambient temperature during the operation of the air conditioner. In order to reduce the frequent replacement of the energy storage module 200 by the user due to the misjudgment of the current storable capacity of the capacitor 201, in the embodiments of the present application, it is necessary to detect that the first charging duration is less than the set charging duration threshold continuously for multiple times before determining that the current storable capacity of the capacitor 201 cannot meet the emergency power supply requirement of the control device when the external power supply 500 is powered off, and instruct the user to replace the energy storage module 200.

[0141] Exemplarily, after generating the warning information, the health status detection method further includes:

[0142] After determining that the energy storage module 200 is replaced, clear the first statistical result.

[0143] It can be understood that the premise for determining that the energy storage module 200 is replaced is that the user replaces the energy storage module 200 after receiving the warning information. After the user completes the replacement operation of the energy storage module 200, the controller 100 receives a reset instruction, determines that the energy storage module 200 has been replaced, clears the first statistical result, and continues to detect the health status of the replaced energy storage module 200.

[0144] In an application example of the present application, the reset instruction can be sent by the user to the air conditioner.

[0145] Here, the reset instruction can be sent based on the display panel of the air conditioner or based on the remote control instruction of the remote controller of the air conditioner.

[0146] In another application example of the present application, the reset instruction can be generated by the controller 100. The controller 100 generates a reset instruction based on the change of the pin - level signal of the first interface, and then confirms the replacement of the energy storage module 200.

[0147] Exemplarily, the health status detection method further includes:

[0148] If it is determined that the first statistical result is less than the set value, control the air conditioner to continue running.

[0149] It can be understood that if it is determined that the first statistical result is less than the set value, it is considered that the current actual capacity of the capacitor 201 can ensure the emergency power supply demand of the control device when the external power supply 500 is powered off, and the air conditioner operates normally.

[0150] It should be noted that if it is determined that the first statistical result is greater than or equal to the set value, the air conditioner can stop running and send a warning message to the user, and continue running after receiving the user's reset instruction, or the air conditioner can be controlled to continue running. The embodiments of the present application do not make specific limitations.

[0151] In an application example of the present application, a method for detecting the health status of a control device of an air conditioner is provided, as Figure 12 shown, including:

[0152] Step 1201, power on the air conditioner.

[0153] Here, powering on the air conditioner means that the external power supply 500 supplies power normally, and the output voltage can ensure the startup and operation of the air conditioner.

[0154] Step 1202, power on and start the controller, and start timing; the power circuit charges the energy storage module.

[0155] Here, the external power supply 500 supplies power to the power circuit 300. After the power circuit 300 operates, it supplies power to the energy storage module 200 and the controller 100. Since the power of the capacitor 201 of the energy storage module 200 is exhausted at this time, the power circuit 300 charges the energy storage module 200, and the controller 100 starts timing and records the first charging duration representing the constant current charging stage duration of the capacitor 201.

[0156] In addition, if the fast discharge circuit 204 is provided with a normally closed switch K1, the controller 100 controls the normally closed switch K1 to be disconnected.

[0157] Step 1203, receive the first information, stop timing, and obtain the first charging duration.

[0158] Here, when the voltage across the capacitor 201 reaches a preset voltage threshold, the charging circuit 202 controls the charging mode of the capacitor 201 to switch to the trickle charging mode. At this time, the SOC of the capacitor 201 reaches a determined value. The charging circuit 202 sends a first message to the controller 100. After receiving the first message, the controller 100 determines that the constant current charging stage of the capacitor 201 ends, the SOC of the capacitor 201 reaches a determined value, stops timing, and obtains the first charging duration. The controller 100 can indirectly determine the current actual capacity of the capacitor 201 by detecting the first charging duration, and then determine the capacity attenuation of the capacitor 201.

[0159] Step 1204, determine the set charging duration threshold.

[0160] Here, the set charging duration threshold is related to the power required for the controller 100 to control at least one valve body 400 to close to the fully closed state and the power that can be stored by the capacitor 201 when it leaves the factory. The set charging duration threshold can be determined based on the charge and discharge curve of the capacitor 201 and the ambient temperature during the operation of the air conditioner, or can be determined according to the average value of the first charging duration of the capacitor 201 of the control device detected.

[0161] Step 1205, determine whether the first charging duration is less than the set charging duration threshold. If so, execute step 1206; if not, execute step 1207.

[0162] Here, if it is determined that the first charging duration is less than the set charging duration threshold, it is considered that there is a potential risk that the current actual capacity of the capacitor 201 cannot ensure the emergency power supply demand of the control device when the external power supply 500 is powered off.

[0163] Step 1206, add one to the cumulative first comparison result.

[0164] Step 1207, clear the first comparison result.

[0165] Step 1208, determine whether the first comparison result is greater than or equal to a set value. If so, execute 1209; if not, execute 1211.

[0166] Here, if it is determined that the first comparison result is greater than or equal to the set value, indicating that the first charging duration is less than the set charging duration threshold has been detected continuously for multiple times, it is determined that the current storable capacity of the capacitor cannot meet the emergency power supply demand of the control device when the external power supply 500 is powered off.

[0167] Step 1209, send a warning message indicating that the capacity attenuation of the capacitor reaches the set threshold.

[0168] Step 1210, receive a reset instruction; based on the reset instruction, determine that the energy storage module is replaced, and clear the first comparison result.

[0169] Here, based on the reset instruction, the controller 100 confirms that the user has replaced the capacitor 201 whose capacity attenuation has reached the set threshold, clears the first comparison result, and continues to detect the health status of the replaced capacitor 201.

[0170] Step 1211, the air conditioner continues to operate.

[0171] It can be understood that any step of the health status detection method of the control device in the foregoing embodiments of the present application can be implemented by the configuration program of the controller 100 of the control device.

[0172] The embodiments of the present application further provide an electronic device, which is an air conditioner. The electronic device includes at least one valve body 400, a first interface, and the control device described above in the embodiments of the present application. Among them, the first interface is used for the energy storage module 200 of the control device. In this way, the energy storage module 200 in the embodiments of the present application adopts an integrated design. A first interface for installing the energy storage module 200 is provided on the air conditioner. The energy storage module 200 can be integrally installed or disassembled based on the first interface, and the user can replace the energy storage module 200 by himself, saving the time and cost of preventive maintenance of the air conditioner; and the controller 100 detects the health status of the capacitor 201, and the air conditioner can prompt the user to replace the capacitor 201 that is about to reach the cycle life in time, ensuring the emergency power supply demand of the control device when the external power supply 500 is powered off, and improving the reliability of the power-off valve closing function of the air conditioner and the safety of the air conditioner.

[0173] In an exemplary embodiment, the embodiment of the present application further provides a storage medium, namely a computer storage medium, specifically a computer-readable storage medium, for example, including a memory storing a computer program, and the foregoing computer program can be executed by a microprocessor of a control device to complete the steps described in the method of the embodiment of the present application. The computer-readable storage medium may be a read-only memory (ROM, Read Only Memory), a programmable read-only memory (PROM, Programmable Read-Only Memory), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory), an electrically erasable programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), a ferromagnetic random access memory (FRAM, ferromagnetic random access memory), a flash memory (Flash Memory), a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM, Compact Disc Read-Only Memory); the magnetic surface memory may be a disk memory or a tape memory.

[0174] It should be noted that: "first", "second", etc. are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence.

[0175] In addition, the technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

[0176] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A control device, characterized in that, The control device is applied to an air conditioner, and at least one valve body is arranged on the refrigerant pipeline of the air conditioner. The control device includes: A controller, configured to control the at least one valve body to actuate and supply power to the at least one valve body; An energy storage module, configured to supply power to the controller when an external power supply is powered off; A power supply circuit, configured to convert and process the external power supply and supply power to the controller and the energy storage module; Wherein, the energy storage module includes: A capacitor, configured to store electrical energy and discharge when the external power supply is powered off; The controller is further configured to detect the health state of the capacitor.

2. The control device according to claim 1, wherein The energy storage module further includes: A charging circuit, configured to convert and process the output power of the power supply circuit and supply power to the capacitor; A discharging circuit, configured to convert and process the output power of the capacitor when the capacitor discharges and supply power to the controller; A fast discharge circuit, configured to release the electrical energy stored in the capacitor when the controller is in a shutdown state.

3. The control device according to claim 1, characterized in that, A first interface for installing the energy storage module is provided on the main control board and / or the terminal interface board of the air conditioner, and the energy storage module is integrally installed or disassembled based on the first interface.

4. The control device according to claim 2, wherein The energy storage module further includes: A voltage detection circuit, configured to detect the voltage across the capacitor, obtain a first voltage value, compare the first voltage value with a set voltage threshold, and send a first comparison result to the charging circuit; the charging circuit controls the charging mode of the capacitor based on the first comparison result; Wherein, the charging mode includes: a constant current charging mode and a trickle charging mode.

5. The control device according to claim 4, characterized in that The charging circuit is further configured to determine that the first voltage value reaches the set voltage threshold based on the first comparison result, control the charging mode of the capacitor to switch to the trickle charging mode, and send a first message to the controller.

6. A method for detecting the health status of a control device according to any one of claims 1 to 5, characterized in that, Including: Obtain a first charging duration and compare the first charging duration with a set charging duration threshold; Update a first statistical result based on the comparison result of the comparison; If it is determined that the first statistical result is greater than or equal to a set value, generate a warning message; Wherein, the first charging duration is the duration required for the power supply circuit to supply power to the energy storage module when the air conditioner is powered on, so that the voltage across the capacitor reaches the set voltage threshold; The warning message indicates that the capacity attenuation of the capacitor reaches a set threshold.

7. The method according to claim 6, characterized in that, The obtaining and recording of the first charging duration includes: Start timing based on a power-on startup instruction; Stop timing based on the first message and obtain the first charging duration; Wherein, the first message is generated by the energy storage module.

8. The method according to claim 6, characterized in that, The updating of the first statistical result based on the comparison result of the comparison includes: If it is determined that the first charging duration is less than the set charging duration threshold, the first statistical result is incremented by one; If it is determined that the first charging duration is greater than or equal to the set charging duration threshold, the first statistical result is cleared.

9. The method according to claim 6, wherein After generating the warning message, the method further includes: After determining that the energy storage module is replaced, clear the first statistical result.

10. The method according to claim 6, characterized in that, The method further includes: If it is determined that the first statistical result is less than the set value, control the air conditioner to continue running.

11. A control device according to any one of claims 1 to 5, characterized in that the controller is configured to perform the steps of the method according to any one of claims 6 to 10.

12. An electronic device, characterized in that, The electronic device is an air conditioner, comprising: at least one valve body, a first interface, and the control device according to claim 11, wherein the first interface is used to install the energy storage module of the control device.

13. A storage medium, on which a computer program is stored, characterized in that, When the computer program is executed by a processor, the steps of the method according to any one of claims 6 to 10 are implemented.

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