CN221526830U

CN221526830U - Control device and air conditioner

Info

Publication number: CN221526830U
Application number: CN202420077061.7U
Authority: CN
Inventors: 邓谷城; 王云亮; 章文凯; 付兆强; 蔡炜杰
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2024-01-11
Filing date: 2024-01-11
Publication date: 2024-08-13
Anticipated expiration: 2034-01-11

Abstract

The application discloses a control device and an air conditioner. Wherein, this controlling means includes: the device comprises a controller, an energy storage module and a power supply circuit. The controller is used for controlling the action of one valve body and supplying power to the 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 supplying power to the controller and the energy storage module after converting an external power supply; the energy storage module comprises a capacitor, and the controller is used for detecting the health state of the capacitor. Based on the detection of the health state of the capacitor by the controller, the air conditioner prompts a user to replace the capacitor which reaches the cycle life in time, so that the emergency power supply requirement of the control device is ensured when the external power supply is powered off; the energy storage module adopts an integral design, so that a user can replace the energy storage module by himself, and the time and cost for preventive maintenance of the air conditioner are saved.

Description

Control device and air conditioner

Technical Field

The present application relates to the field of air conditioners, and in particular, to a control device and an air conditioner.

Background

In the air conditioner, an electric valve is generally used, and the opening degree, flow path cutoff and opening of the electric valve are controlled by sending a pulse signal or switching on and off of a power supply, so that the electric valve is controlled to be in a set state before the air conditioner stops running. When the external power supply of the air conditioner is suddenly powered off, the controller of the air conditioner does not control the electric valve any more, and the electric valve keeps the opening state before power off until the next power on. If leakage points appear in the internal machine of the air conditioner, the refrigerant in the refrigerant pipeline can leak into the surrounding environment of the air conditioner through the electric valve because the electric valve keeps the current opening state, and part of types of refrigerant have combustibility and have potential safety hazards.

In the related art, an energy storage unit is generally disposed in a control device of an air conditioner, and is used for providing an emergency power supply when an external power supply is powered off, so that a controller can control an electric valve to be closed. However, the actual capacity of the energy storage unit gradually decays along with the aging of the energy storage unit, so that the problem that the actual capacity of the energy storage unit cannot meet the emergency power supply requirement of the control device exists in the service life of the air conditioner.

Disclosure of utility model

In view of the above, the embodiment of the application provides a control device and an air conditioner, which aim to improve the reliability of the power-off valve closing function of the air conditioner and the safety of the air conditioner.

The technical scheme of the embodiment of the application is realized as follows:

In a first aspect, an embodiment of the present application provides a control device, where the control device is applied to an air conditioner, and at least one valve body is disposed on a refrigerant pipeline of the air conditioner, and the control device includes:

The controller is used for controlling the action of the at least one valve body and supplying power to the at least one 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 supplying power to the controller and the energy storage module after the external power supply is converted;

wherein, the energy storage module includes:

The capacitor is used for storing the electric energy output by the power supply circuit and discharging when the external power supply is powered off;

The controller is also configured to detect a health state of the capacitor.

In some embodiments, the energy storage module further comprises:

the charging circuit is used for supplying power to the capacitor after the conversion treatment of the output power supply of the power supply circuit;

And the discharging circuit is used for supplying power to the controller after the output power supply conversion processing of the capacitor when the capacitor discharges.

In some embodiments, the energy storage module further comprises:

and the fast-release circuit is used for releasing the electric energy stored by the capacitor when the controller is in a stop state.

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

In some embodiments, the energy storage module further comprises:

The voltage detection circuit is used for detecting the voltages at two ends of the capacitor, acquiring a first voltage value, comparing the first voltage value with a set voltage threshold value, and sending a first comparison result to the charging circuit; the charging circuit controls a charging mode of the capacitor based on the first comparison result;

Wherein the charging mode includes: constant current charging mode and trickle charging mode.

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 a charging mode of the capacitor to switch to the trickle charging mode, and send a first message to the controller.

In some embodiments, the controller is further configured to detect a charge duration of the capacitor in the constant current charging mode based on the first information, and determine a health state of the capacitor based on the charge duration;

Wherein the state of health of the capacitor comprises a capacity fade condition of the capacitor.

In some embodiments, the charging circuit comprises: a step-down circuit; the discharge circuit includes: a booster circuit.

In a second aspect, an embodiment of the present application provides an air conditioner, where at least one valve body is disposed on a refrigerant pipeline of the air conditioner, and the air conditioner includes a first interface and a control device according to the first aspect of the present application, where the first interface is used to install an energy storage module of the control device.

In some embodiments, the refrigerant line includes at least one indoor unit refrigerant leg, and the at least one valve body includes electrically operated valves disposed on an inlet side and an outlet side of the at least one indoor unit refrigerant leg.

The control device of the air conditioner provided by the embodiment of the application comprises a controller, an energy storage module and a power supply circuit, wherein the energy storage module comprises 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 a user to replace the capacitor which reaches the cycle life in time, so that the emergency power supply requirement of the control device is ensured when the external power supply is powered off; the energy storage module adopts integral design, and the air conditioner is provided with the installation interface that matches, and the user can change the energy storage module by oneself, saves time and the cost of preventive maintenance of air conditioner.

Drawings

FIG. 1 is a schematic diagram of a control device of an air conditioner according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an air conditioner according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a control device according to another embodiment of the present application;

FIG. 4 is a schematic circuit diagram of an energy storage module according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a control device according to an application example of the present application;

FIG. 6 is a schematic diagram of a control device according to another embodiment of the present application;

Fig. 7A is a schematic structural diagram of a main control board of an air conditioner in an application example of the present application;

fig. 7B is a schematic structural diagram of a main control board of an air conditioner according to another application example of the present application;

fig. 8A is a schematic structural view of an air conditioner according to another application example of the present application;

FIG. 8B is a schematic view illustrating an internal structure of an air conditioner according to an embodiment of the present application;

fig. 9A is a schematic structural view of an air conditioner according to another application example of the present application;

fig. 9B is a schematic view illustrating the structure of the inside of an air conditioner according to another application example of the present application;

Fig. 10 is a schematic structural diagram of a control device in yet another application example of the present application;

FIG. 11 is a flowchart of a method for detecting a health status of a control device according to an embodiment of the present application;

Fig. 12 is a flowchart of a method for detecting a health status of a control device according to another application example of the present application.

Detailed Description

The present application will be described in further detail with reference to the accompanying drawings and examples.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The embodiment of the application provides a control device, as shown in fig. 1, the control device is applied to an air conditioner, at least one valve body 400 is arranged on a refrigerant pipeline of the air conditioner, and the control device comprises: a controller 100, an energy storage module 200, and a power circuit 300. The controller 100 is configured to control the operation of the at least one valve body 400 and to power the at least one valve body 400. The energy storage module 200 is used for supplying power to the controller 100 when the external power supply 500 is powered off. The power supply circuit 300 is used for supplying power to the controller 100 and the energy storage module 200 after converting the external power supply 500. The energy storage module 200 includes a capacitor 201, and the capacitor 201 is used to store the electric energy output from the power circuit 300 and discharge when the external power supply 500 is powered off. The controller 100 is also used to detect the health of the capacitor 201.

Here, the refrigerant is used for transferring heat energy in the air conditioner to generate refrigeration or heating effect; the refrigerant pipeline is connected with an inner machine and an outer machine of the air conditioner and is used for circulating a refrigerant; the valve body 400 is used for controlling the refrigerant flow in the refrigerant pipeline by adjusting the opening degree, so as to generate different refrigeration or heating effects.

Wherein the valve body 400 may be an electric valve; the air conditioner includes at least one valve body 400, and the number of the valve bodies 400 may be determined according to the number of refrigerant lines.

In addition, the air conditioner may further include two valve bodies 400 disposed on the main circuit of the refrigerant pipe, and when the controller 100 controls the two valve bodies 400 to be closed to a fully closed state, all the refrigerant pipes are in a cut-off state.

In an application example of the present application, a schematic structural diagram of an air conditioner is provided, as shown in fig. 2. The outer machine of the air conditioner comprises an outdoor heat exchanger, a gas-liquid separator, a compressor, a one-way valve, a four-way valve and other parts, a refrigerant pipeline is arranged between the inner machine and the outer machine of the air conditioner, an electric valve is arranged on each refrigerant pipeline branch for controlling the refrigerant flow in the refrigerant pipeline branch, and an electric valve is arranged on the inlet side and the outlet side of a main loop of the refrigerant pipeline for cutting off the refrigerant circulation in the refrigerant pipeline.

It can be understood that the controller 100 controls all the electric valves on the branch circuit of the refrigerant pipeline to be closed to a fully closed state, or controls all the electric valves on the main circuit of the refrigerant pipeline to be closed to a fully closed state, so that all the refrigerant pipelines can be in a cut-off state.

When the controller 100 of the air conditioner receives an external shutdown command, the controller 100 sequentially shuts down all working components of the air conditioner according to a set shutdown step, and after all the shutdown steps are performed, the controller 100 performs a power-off step, and at this time, the air conditioner loses control power and is in a shutdown power-off state.

Wherein 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, an energy storage unit is usually disposed in a control device of an air conditioner, and is used for providing an emergency power supply when an external power supply is powered off, if the control device does not dispose the energy storage unit, when the external power supply of the air conditioner is suddenly powered off, the controller loses the input power, and cannot execute a shutdown step before power off, the controller does not control the opening of the valve body any more, and the valve body maintains the opening state before power off until the next power on. If leakage points appear in the air conditioner internal unit, because the valve body keeps the current opening state, the refrigerant in the refrigerant pipeline can leak to the surrounding environment where the air conditioner is located through the leakage points and the valve body, and potential safety hazards exist; when the refrigerant has combustibility, explosion may even occur.

It can be appreciated that in the related art, based on the provision of the energy storage unit at the control device, the emergency power supply can be provided when the external power supply is powered off, so that the controller can control the electric valve to be closed.

It should be noted that, in the related art, the actual capacity of the energy storage unit gradually decreases with aging of the energy storage unit, so that the problem exists that the actual capacity of the energy storage unit cannot meet the emergency power supply requirement of the control device during the service life of the air conditioner. The user can't learn because the capacity decay of energy storage unit, and the air conditioner has unable to realize the function of automatic shut-off valve when external power supply outage, and when the user need change the energy storage unit that reaches cycle life, if the energy storage unit sets up on the main control board of air conditioner, the user needs to carry out whole change to the main control board, has caused the wasting of resources.

Illustratively, the air conditioner is provided with a first interface for mounting the energy storage module 200, and the energy storage module 200 is integrally mounted or dismounted based on the first interface.

It can be appreciated that, the energy storage module 200 in the embodiment of the present application adopts an integral design, a first interface for installing the energy storage module 200 is provided in the air conditioner, the energy storage module 200 can be integrally installed or detached based on the first interface, and a user can replace the energy storage module 200 by himself, thereby saving the time and cost of preventive maintenance of the air conditioner; and the controller 100 detects the health state of the capacitor 201, the air conditioner can prompt a user to replace the capacitor 201 which reaches the cycle life in time, the emergency power supply requirement of the control device when the external power supply 500 is powered off is ensured, and the reliability of the power-off valve closing function of the air conditioner and the safety of the air conditioner are improved.

Preferably, the capacitor 201 is preferably a super capacitor.

Here, the super capacitor is an electrochemical device capable of rapidly storing and supplying high-power and having a long cycle life, a higher energy density and a lower voltage limit. The super capacitor is selected as an energy storage unit of the control device, so that the volume of the energy storage module 200 is reduced, and the integral design of the energy storage module 200 is facilitated.

In addition, the Health State (SOH for short) of the capacitor 201 mainly includes two main indexes of capacity attenuation and equivalent direct current internal resistance, wherein the capacity attenuation represents a ratio of the current actual capacity of the capacitor 201 to the storable electric quantity when leaving the factory, and the ratio of the current actual capacity of the capacitor 201 to the storable electric quantity when leaving the factory gradually decreases along with the aging of the capacitor 201; the equivalent dc resistance of the capacitor 201 gradually increases with the aging of the capacitor 201, so as the service time of the capacitor 201 increases, the temperature rise of the capacitor 201 increases gradually during the charging and discharging processes.

It should be noted that, when the controller 100 in the embodiment of the present application detects that the capacity attenuation condition of the capacitor 201 is about to reach the cycle life, and the actual capacity cannot guarantee the emergency power supply requirement of the control device, the controller 100 sends an early warning to the user to prompt the user to replace the capacitor 201.

In one application example, the power supply circuit 300 may include a rectifying circuit for rectifying alternating current output from the external power supply 500 into direct current, a filter circuit, and a switching power supply circuit; the filter circuit is used for eliminating higher harmonics in the direct current output by the rectifier circuit; the switching power supply circuit is used to regulate the output voltage of the filter circuit to the operating voltage of the controller 100.

Illustratively, as shown in fig. 3, the energy storage module 200 further includes: a charging circuit 202 and a discharging circuit 203. The charging circuit 202 is used for supplying power to the capacitor 201 after the output power of the power circuit 300 is converted; the discharging circuit 203 is configured to supply power to the controller 100 after converting the output power of the capacitor 201 when the capacitor 201 is discharged.

It will be appreciated that when the external power supply 500 is supplying power normally, the charging circuit 202 operates normally and the discharging circuit 203 is in an off state; when the external power supply 500 is powered off, the charging circuit 202 is in an off state and the discharging circuit 203 operates normally.

Illustratively, the charging circuit 202 includes a buck circuit and the discharging circuit 203 includes a boost circuit.

It can be appreciated that the charging circuit 202 includes a voltage reducing circuit, which can fully utilize the advantage of high energy density of the capacitor 201, reduce the rated voltage of the capacitor 201, reduce the volume of the capacitor 201, and facilitate the integral design of the energy storage module 200.

In an application example of the present application, a main power topology circuit of the energy storage module 200 is provided, as shown in fig. 4, wherein the charging circuit 202 is a Buck-Boost circuit, and the discharging circuit 203 is a Boost-Boost circuit; the energy storage module 200 is grounded through the capacitors C1-C3, the inductors L41 and L42 play a role in energy storage and filtering, the terminals VIN1 and VIN2 are connected with the power circuit 300 in parallel, the terminal VOUT is connected with the capacitor 201, and the boosting and the reducing functions of the energy storage module 200 are realized by controlling the on and off of the field effect transistors Q41-Q44.

Illustratively, as shown in fig. 5, the energy storage module 200 further includes a fast-discharging circuit 204. The fast-discharging circuit 204 is used for discharging the electric energy stored in the capacitor 201 when the controller 100 is in the shutdown state.

When the controller 100 is in the shutdown state, the air conditioner is no longer operated, the power 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-discharging circuit 204 is directly connected to two ends of the capacitor 201, and at this time, the electric energy stored in the capacitor 201 is rapidly discharged through the fast-discharging circuit 204, and the power circuit 300 recharges the energy storage module 200 when the air conditioner is powered on next time.

It can be understood that the capacitor 201 discharges electric energy through the fast-discharging circuit 204, so that the stored electric energy is exhausted as much as possible, the power circuit 300 recharges the energy storage module 200 when the air conditioner is powered on next time, and the controller 100 can judge the current actual capacity of the capacitor 201 according to the charging duration of each time of the capacitor 201, thereby indirectly judging the health state of the capacitor 201; and when the user dismantles the energy storage module 200, effectively avoided electric capacity 201 to human body discharge, promoted the security of energy storage module 200 change operation.

In an application example of the present application, a schematic structural diagram of the control device energy storage module 200 is provided, as shown in fig. 6. The fast amplifying circuit 204 may include a large-resistance resistor R1 and a normally closed switch K1, where the normally closed switch K1 is controlled by the controller 100. When the controller 100 is in the operation state, the controller 100 controls the normally closed switch K1 to be turned off, and the capacitor 201 is in the charging or discharging state; when the controller 100 is in the shutdown state, the normally closed switch K1 is restored to the closed state, and the capacitor 201 discharges the large-value resistor R1.

In one application example of the present application, the fast-discharging circuit 204 may include only the large-value resistor R1. When the power circuit 300 charges the energy storage module 200, the resistance value of the large-resistance resistor R1 is far greater than the internal resistance of the capacitor 201, and the fast discharging circuit 204 is equivalent to open circuit at this time, so that the charging circuit 202 is not influenced to charge the capacitor 201; when the energy storage module 200 supplies power to the controller 100, since the resistance of the large-resistance resistor R1 is far greater than that of the controller 100, the fast discharging circuit 204 is equivalent to a circuit breaker, and the discharging circuit 203 is not affected to supply power to the controller 100; when the controller 100 is in a shutdown state, the air conditioner loses control power, at which time the charging circuit 202 and the discharging circuit 203 no longer operate, and the capacitor 201 can only be discharged through the large-resistance resistor R1.

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

Illustratively, the air conditioner includes a main control board 600 and a terminal interface board 700, and the main control board 600 and/or the terminal interface board 700 of the air conditioner are provided with a first interface.

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

It is understood that the first interface is used to mount the energy storage module 200, and the energy storage module 200 may be integrally mounted on the main control board 600 or the terminal interface board 700 of the air conditioner based on the first interface.

The first interface may be an electrical interface. The energy storage module 200 may be electrically connected to the controller 100 and the power circuit 300 based on the first interface, in addition to being mounted and fixed on the main control board 600 or the terminal interface board 700 of the air conditioner based on the first interface.

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 fig. 7A shows a schematic structural diagram of an energy storage module 200 mounted on the main control board 600 based on a first interface, and fig. 7B shows a schematic structural diagram of the energy storage module 200 detached from the main control board.

It can be appreciated that the main control board 600 of the air conditioner is provided with a first interface, the energy storage module 200 is integrally packaged, and a user can install the energy storage module 200 on the main control board 600 or detach the energy storage module from the main control board 600 according to the need. The energy storage module 200 is directly installed on the main control board 600, so that the electric connection between the energy storage module 200 and the power circuit 300 and between the energy storage module and the controller 100 can be conveniently realized, and the wiring design of the main control board 600 is facilitated.

In an application example of the present application, a schematic structural diagram of an air conditioner is provided, as shown in fig. 8A, wherein the air conditioner is provided with a front panel 800, and a user can open the front panel 800 of the air conditioner by himself. Fig. 8B shows a schematic structural diagram of an air conditioner in which the front panel 800 is opened, wherein the main control board 600 of the air conditioner is arranged explicitly, the main control board 600 is disposed in the air conditioner in which the front panel 800 is facing, and a user can directly replace the energy storage module 200 on the main control board 600 after opening the front panel 800.

In an application example of the present application, a schematic structural diagram of an air conditioner is provided, as shown in fig. 9A. The air conditioner is provided with a maintenance panel 900, an invisible handle 901 is arranged on the maintenance panel, and a user can open the maintenance panel 900 by himself based on the invisible handle 901. Fig. 9B is a schematic view showing a structure of an air conditioner inside which the maintenance panel 900 is opened, wherein the terminal interface board 700 of the air conditioner is sealed based on the maintenance panel 900, a first interface is provided on the terminal interface board 700, and a user can install the energy storage module 200 on the terminal interface board 700 or detach it from the terminal interface board 700 according to need after opening the maintenance panel 900.

It is understood that the controller 100 and the power circuit 300 may be connected to each other through the connection terminals, whether the energy storage module 200 is directly mounted on the main control board 600 or mounted on the terminal interface board 700.

Illustratively, as shown in fig. 10, the energy storage module 200 further includes a voltage detection circuit 205. The voltage detection circuit 205 is configured to detect voltages at two ends of 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. Wherein, the charging mode includes: constant current charging mode and trickle charging mode.

It should be noted that, because the energy density of the capacitor 201 is large, the voltage of the capacitor 201 changes slowly during the charging process, the voltage detection circuit 205 cannot provide voltage feedback rapidly during the charging start process, and if the charging circuit 202 charges the capacitor 201 in a constant voltage charging mode, the charging current of the capacitor 201 is easily too large to exceed the power supply capability of the power supply circuit 300, so that the output voltage of the power supply circuit 300 is lowered, which affects the normal operation of the controller 100. In view of the foregoing, the charging circuit 202 according to the embodiment of the present application needs to control the charging current of the capacitor 201 to be constant and not to exceed the power supply capability range of the power supply circuit 300.

Here, the charging circuit 202 further includes a current sampling feedback circuit for collecting an output current value of the charging circuit 202 and feeding back the collected current value to the charging circuit 202, and the charging circuit 202 determines whether the charging current of the charging circuit 202 is constant and not out of the power supply capability range of the power supply circuit 300 based on the collected current value fed back.

It is understood that the charging modes of the capacitor 201 include 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, and as the charging process proceeds, the current stored electric quantity of the capacitor 201 is gradually increased, and the charging voltage output by the charging circuit 202 is also gradually increased; when the output voltage of the charging circuit 202 is equal to the target charging voltage (i.e., the set voltage threshold) of the capacitor 201, the charging circuit 202 cannot maintain the constant charging current by increasing the output voltage, at this time, the charging circuit 202 charges the capacitor 201 in a trickle charging mode, and in the trickle charging mode, the charging circuit 202 charges the capacitor 201 with a small current at a constant voltage to compensate for the power loss of the capacitor 201 due to self-discharge.

Here, considering that the capacitor 201 needs to reserve a sufficient withstand voltage derate, the set voltage threshold should be smaller than the allowable charging voltage of the capacitor 201 at the current temperature.

The allowable charging voltage of the capacitor 201 may be a unique determined value, and the allowable charging voltage of the capacitor 201 may be determined in combination with an average temperature of an ambient environment where the air conditioner is located, for example, the average temperature is 25 ℃, and the set voltage threshold should be smaller than the allowable charging voltage of the capacitor 201 at the average ambient temperature.

The voltage detection circuit 205 includes a comparator for comparing the first voltage value with a set voltage threshold value, generating a first comparison result and transmitting the first comparison result to the charging circuit 202, and the charging circuit 202 controls the charging mode of the capacitor 201 based on the first comparison result.

Illustratively, 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, switch the charging mode of the control capacitor 201 to the trickle charging mode, and send the first information to the controller 100.

It should be noted that, as the capacitor 201 ages, there may be a case where the capacity of the capacitor 201 decays, that is, the ratio of the current actual capacity of the capacitor 201 to the storable electric power of the capacitor 201 when leaving the factory is gradually reduced. However, the capacity attenuation of the capacitor 201 only affects the current storable capacity of the capacitor 201, and does not affect the charge-discharge voltage interval of the capacitor 201, i.e., the health status of the capacitor 201 does not affect the charge-discharge characteristic curve of the capacitor 201.

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 is a determined value, that is, the State of Charge (SOC) of the capacitor 201 is a determined value, where the SOC represents the ratio of the remaining capacity of the capacitor 201 to the current storable capacity. For example, based on the determination of the set voltage threshold, the SOC of the capacitor 201 is made 90% when the output voltage of the charging circuit 202 reaches the set voltage threshold, and even if there is capacity fading of the capacitor 201 with the aging of the capacitor 201, the SOC of the capacitor 201 remains 90% when the output voltage of the charging circuit 202 reaches the set voltage threshold.

It may be appreciated that when the charging circuit 202 determines that the first voltage value reaches the set voltage threshold based on the first comparison result, the charging mode of the control capacitor 201 is switched to the trickle charging mode, and the first information is sent to the controller 100, and the controller 100 may determine that the SOC of the capacitor 201 reaches the determined value at this time based on the first information.

Illustratively, the controller 100 is further configured to detect a charging duration of the capacitor 201 in the constant current charging mode based on the first information, and determine a health state of the capacitor 201 based on the charging duration. The health of the capacitor 201 includes, among other things, the capacity fade of the capacitor 201.

It may be understood that, after the controller 100 receives the first information, it determines that the charging mode of the capacitor 201 is switched to the trickle charging mode and the SOC of the capacitor 201 reaches a determined value, the controller 100 detects and records the charging duration of the capacitor 201 in the constant current charging mode, compares the recorded charging duration with a set charging duration threshold, and if the recorded charging duration is significantly lower than the set charging duration threshold, it indicates that the capacity attenuation condition of the capacitor 201 is significant.

In an application example of the present application, there is provided a health state detection method based on the aforementioned control device, as shown in fig. 11, the method including:

Step 1101, a first charging duration is obtained, and the first charging duration is compared with a set charging duration threshold.

Step 1102, updating a first statistical result based on the compared result of the comparison.

In step 1103, if the first statistical result is greater than or equal to the set value, early warning information is generated.

The first charging time period is a time period 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 pre-warning information characterizes the capacity fade of the capacitor 201 to reach a set threshold.

It can be appreciated that when the external power supply 500 is powered off, the energy storage module 200 supplies power to the controller 100, and the energy storage module 200 provides the controller 100 with an amount of power that at least ensures that the controller 100 controls the at least one valve body 400 to be closed to a fully closed state. When the current actual capacity of the capacitor 201 is attenuated to an extent that it is not guaranteed that the amount of electricity required for the controller 100 to control the at least one valve body 400 to be closed to the fully closed state can be provided, an early warning message needs to be sent to the user.

It will be appreciated that the user may choose to replace the energy storage module 200 based on receiving the pre-warning information.

It should be noted that, the energy storage module 200 includes a fast discharging circuit 204, when the controller 100 is in a power-off state, the electric energy stored in the capacitor 201 is rapidly discharged through the fast discharging circuit 204, after the electric energy stored in the capacitor 201 is rapidly discharged through the fast discharging circuit 204, the power circuit 300 recharges the energy storage module 200 when the air conditioner is powered on next time.

It should be noted that, when the air conditioner is powered on and started, the electric energy stored in the capacitor 201 is exhausted, the power circuit 300 charges the capacitor 201 through the charging circuit 202, and the charging current of the capacitor 201 is constant in the first charging period, so that the first charging period can directly reflect the condition that the electric energy (i.e. the residual electric energy) stored in the capacitor 201 when the voltages at two ends of the capacitor 201 reach the set voltage threshold.

It can be understood that the capacity fade of the capacitor 201 does not affect the charge-discharge voltage interval of the capacitor 201, when the voltage at two ends of the capacitor 201 reaches the set voltage threshold, the SOC of the capacitor 201 is a determined value, that is, the ratio of the remaining capacity of the capacitor 201 to the current actual capacity is fixed, and since the first charging duration can directly reflect the remaining capacity condition of the capacitor, the controller 100 can indirectly determine the current actual capacity of the capacitor 201 by detecting the first charging duration, thereby determining the capacity fade condition of the capacitor 201.

Here, the set charging period threshold may be determined based on the charging and discharging curve of the capacitor 201 and the ambient temperature when the air conditioner is operated, or may be determined according to the detected average value of the first charging period of the capacitor 201 of the control device.

For example, based on the amount of electricity required by the controller 100 to control the at least one valve body 400 to be closed to the fully closed state and the amount of electricity storable 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 amount of electricity storable when the capacitor 201 leaves the factory is greater than or equal to 80%, the capacitor 201 can ensure an emergency power supply requirement of the control device when the external power supply 500 is powered off. The set charge duration threshold t ₁ may be derived according to:

t₁＝80％×t_T0/I0；

Wherein, T _T0/I0 is the ambient temperature when the air conditioner is running, T _T0/I0 is the constant current charging time of the capacitor 201 when the preset charging current is I0, and the technical specification provided by the manufacturer of the capacitor 201 can be obtained.

In addition, the set charging time period threshold t ₁ may also be obtained according to the following equation:

Wherein t ₀ is a detected value of the first charging duration of the first N ₁ times of the capacitor 201 of the control device.

It will be appreciated that, in consideration of the environmental temperature change during operation of the air conditioner, the charging time period threshold t ₁ may also be determined according to the average value of the first charging time periods of the capacitor 201 of the control device detected N ₁ times before.

Here, the embodiment of the present application provides two determination methods for setting the charging duration threshold, and the embodiment of the present application does not specifically limit the determination method for setting the charging duration threshold.

It may be appreciated that based on comparing the first charge duration with the set charge duration threshold, determining and counting a number of times the first charge duration is less than the set charge duration threshold, and generating a first statistical result. When the first statistical result is greater than or equal to the set value, it is considered that the capacity of the capacitor 201 is attenuated to an extent that the capacity of the capacitor is not guaranteed to be able to provide the electric quantity required by the controller 100 to control the at least one valve body 400 to be closed to the fully closed state, and early warning information is sent to the user to indicate that the user needs to replace the energy storage module 200.

It can be appreciated that, the controller 100 in 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 will reach the cycle life in time, so as to ensure the emergency power supply requirement 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.

In an application example of the present application, acquiring and recording a first charging duration includes:

Timing is started based on the power-on start command.

And stopping timing based on the first information, and acquiring a first charging time length.

Wherein the first information is generated by the energy storage module.

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

It will be appreciated that when the voltage across the capacitor 201 reaches the set voltage threshold, the charging mode of the capacitor 201 switches to the trickle charge mode and the charging circuit 202 sends a first message to the controller 100 indicating that the constant current charging mode of the capacitor 201 is complete. After receiving the first information, the controller 100 determines that the constant current charging mode of the capacitor 201 is finished, and the SOC of the capacitor 201 reaches a determined value, so as to obtain a first charging duration.

In one application example of the present application, updating the first statistical result based on the comparison result of the comparison includes:

If the first charging duration is determined to be smaller than the set charging duration threshold, the first statistical result is accumulated and added by one.

And if the first charging time length is greater than or equal to the set charging time length threshold value, resetting the first statistical result.

The first charging period is related to the capacity fade of the capacitor 201, and also to the ambient temperature when the air conditioner is operated. When the first charging duration is less than the set charging duration threshold, the current storable capacity of the capacitor 201 is considered to be incapable of meeting the emergency power supply requirement of the control device when the external power supply 500 is powered off, and the controller 100 records the comparison result, and adds one to the first statistical result accumulation; if the controller 100 subsequently obtains the comparison result that the first charging time length is greater than or equal to the set charging time length threshold, considering the influence factors such as the ambient temperature when the air conditioner is running, the current actual capacity of the capacitor 201 is considered to be misjudged before, the controller 100 clears the first statistics result, and continues to make statistics again.

It can be appreciated that, in the embodiment of the present application, the current storable capacity of the capacitor 201 is indirectly determined based on the detection of the first charging time period, which is affected by factors such as the ambient temperature during operation of the air conditioner, so as to reduce frequent replacement of the energy storage module 200 by the user due to misjudgment of the current storable capacity of the capacitor 201.

In an application example of the present application, after generating the early warning information, the health status detection method further includes:

after determining that the energy storage module 200 is replaced, the first statistical result is cleared.

It can be appreciated that the premise of determining that the energy storage module 200 is replaced is that the user changes the energy storage module 200 after receiving the early 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 completed the replacement, clears the first statistical result, and continues to detect the health status of the replaced energy storage module 200.

In an application example of the present application, the reset instruction may be sent to the air conditioner by the user.

Here, the reset instruction may be transmitted based on a display panel of the air conditioner, or may be transmitted based on a remote control instruction of a remote controller of the air conditioner.

In another application example of the present application, a reset instruction may be generated by the controller 100. The controller 100 generates a reset command based on the pin level signal change of the first interface, thereby confirming replacement of the energy storage module 200.

In an application example of the present application, the health status detection method further includes:

and if the first statistical result is smaller than the set value, controlling the air conditioner to continue to operate.

It will be appreciated that if the first statistical result is determined to be smaller than the set value, the current actual capacity of the capacitor 201 is considered to ensure that the emergency power supply requirement of the control device is met when the external power supply 500 is powered off, and the air conditioner operates normally.

It should be noted that, if the first statistical result is determined to be greater than or equal to the set value, the air conditioner may stop running and send early warning information to the user, and continue running after receiving the reset instruction of the user, or may control the air conditioner to continue running.

In an application example of the present application, there is provided a health state detection method of a control device of an air conditioner, as shown in fig. 12, including:

Step 1201, the air conditioner is powered on.

Here, the air conditioner is powered on, that is, the external power supply 500 supplies power normally, and the output voltage can ensure the starting operation of the air conditioner.

Step 1202, the controller is powered on and started to start timing; the power supply circuit charges the energy storage module.

Here, the external power supply 500 supplies power to the power supply circuit 300, and the power supply circuit 300 supplies power to the energy storage module 200 and the controller 100 after running, and the power supply circuit 300 charges the energy storage module 200 because the electric quantity of the capacitor 201 of the energy storage module 200 is exhausted at this time, and the controller 100 starts timing and records a first charging duration representing a constant current charging period duration of the capacitor 201.

In addition, if the fast discharging circuit 204 is provided with a normally closed switch K1, the controller 100 controls the normally closed switch K1 to be turned off.

Step 1203, receiving the first information, stopping timing, and obtaining a first charging duration.

Here, when the voltage across the capacitor 201 reaches the 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 first information to the controller 100, the controller 100 determines that the constant current charging phase of the capacitor 201 is finished after receiving the first information, the SOC of the capacitor 201 reaches the determined value, and the timing is stopped, so as to obtain the first charging duration. The controller 100 may indirectly determine the current actual capacity of the capacitor 201 by detecting the first charging period, thereby determining the capacity fade condition of the capacitor 201.

Step 1204, determining a set charge duration threshold.

Here, the set charge duration threshold is related to the amount of electricity required for the controller 100 to control the at least one valve body 400 to be closed to the fully closed state and the storable amount of electricity when the capacitor 201 leaves the factory, and the set charge duration threshold may be determined based on a charge-discharge curve of the capacitor 201 and an ambient temperature when the air conditioner is operated, or may be determined according to a detected average value of the first charge duration of the capacitor 201 of the control device.

Step 1205, determining whether the first charging duration is less than a set charging duration threshold, if so, executing step 1206; if not, step 1207 is performed.

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 guarantee the emergency power supply requirement of the control device when the external power supply 500 is powered off.

In step 1206, the first comparison result is incremented by one.

Step 1207, clear the first comparison result.

Step 1208, determining whether the first comparison result is greater than or equal to the set value, if yes, executing 1209; if not, 1211 is performed.

Here, if it is determined that the first comparison result is greater than or equal to the set value, which means that the first charging duration is less than the set charging duration threshold value has been detected multiple times in succession, it is determined 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.

Step 1209, sending early warning information indicating that the capacity fade of the capacitor reaches a set threshold.

Step 1210, receiving a reset instruction; based on the reset instruction, the energy storage module is determined to be replaced, and the first comparison result is cleared.

Here, the controller 100 confirms that the user has replaced the capacity-attenuated capacitor 201 based on the reset instruction, clears the first comparison result, and continues the health detection of the replaced capacitor 201.

The air conditioner continues to operate at step 1211.

It will be appreciated that any of the steps of the method for detecting the health status of a control device in the application example of the present application described above may be implemented by a configuration program of the controller 100 of the control device.

The embodiment of the application also provides an air conditioner, at least one valve body 400 is arranged on a refrigerant pipeline of the air conditioner, and the air conditioner comprises a first interface and the control device. Wherein the first interface is used for controlling the energy storage module 200 of the device. Thus, the energy storage module 200 of the embodiment of the application adopts an integral design, a first interface for installing the energy storage module 200 is arranged in the air conditioner, the energy storage module 200 can be integrally installed or detached based on the first interface, and a user can automatically replace the energy storage module 200, so that the time and the cost for preventive maintenance of the air conditioner are saved; and the controller 100 detects the health state of the capacitor 201, the air conditioner can prompt a user to replace the capacitor 201 which reaches the cycle life in time, the emergency power supply requirement of the control device when the external power supply 500 is powered off is ensured, and the reliability of the power-off valve closing function of the air conditioner and the safety of the air conditioner are improved.

The refrigerant pipe of the air conditioner comprises at least one indoor unit refrigerant branch, and the at least one valve body comprises an electric valve arranged on the inlet side and the outlet side of the at least one indoor unit refrigerant branch.

In an application example of the present application, there is further provided a storage medium, i.e. a computer storage medium, which may be a computer readable storage medium, for example, including a memory storing a computer program, where the computer program may be executed by a microprocessor of a control device to perform the steps of the method according to the embodiment of the present application. The computer-readable storage medium may be Read Only Memory (ROM), programmable Read Only Memory (PROM, programmable Read-Only Memory), erasable programmable Read Only Memory (EPROM, erasable Programmable Read-Only Memory), electrically erasable programmable Read Only Memory (EEPROM, ELECTRICALLY ERASABLE PROGRAMMABLE READ-Only Memory), magnetic random access Memory (FRAM, ferromagnetic random access Memory), flash Memory (Flash Memory), magnetic surface Memory, optical disk, or compact disk Read Only Memory (CD-ROM, compact Disc Read-Only Memory); the magnetic surface memory may be a disk memory or a tape memory.

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

In addition, the embodiments of the present application may be arbitrarily combined without any collision.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. A control device, characterized in that, the control device is applied to the air conditioner, set up at least one valve body on the refrigerant pipeline of air conditioner, the control device includes:

wherein, the energy storage module includes:

The controller is also configured to detect a health state of the capacitor.

2. The control device of claim 1, wherein the energy storage module further comprises:

3. The control device of claim 2, wherein the energy storage module further comprises:

4. The control device according to claim 1, wherein the main control board and/or the terminal interface board of the air conditioner is provided with a first interface for mounting the energy storage module, and the energy storage module is integrally mounted or dismounted based on the first interface.

5. The control device of claim 2, wherein the energy storage module further comprises:

6. The control device of claim 5, wherein 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 a charging mode of the capacitor to switch to the trickle charging mode, and send a first message to the controller.

7. The control device according to claim 6, wherein the controller is further configured to detect a charging period of the capacitor in the constant current charging mode based on the first information, and determine a health state of the capacitor based on the charging period;

8. The control device according to claim 2, wherein the charging circuit includes: a step-down circuit; the discharge circuit includes: a booster circuit.

9. An air conditioner provided with at least one valve body on a refrigerant pipeline of the air conditioner, the air conditioner comprising a first interface and the control device according to any one of claims 1 to 8, wherein the first interface is used for installing an energy storage module of the control device.

10. The air conditioner as set forth in claim 9, wherein said refrigerant line includes at least one indoor unit refrigerant branch, and at least one valve body includes electric valves provided at an inlet side and an outlet side of said at least one indoor unit refrigerant branch.