Air valve control method, air valve controller and central purification system

Abstract

The invention discloses an air valve control method, an air valve controller, a central purification system, a computer readable storage medium and a computer program product. The air valve controller calculates the target working power of a range hood according to the obtained target working current and target working voltage; and the target working power is compared with a valve opening power threshold value and a valve closing power threshold value, and whether the air valve is controlled to conduct auxiliary smoke exhaust or the air valve is controlled to stop smoke exhaust is determined based on the size relation between the target working power and the valve opening power threshold value and the valve closing power threshold value. According to the control method provided by the invention, whether to assist smoke discharge or stop smoke discharge is controlled through the working power of the range hood, and the working power is generally at a relatively constant value, so that the fluctuation amplitude is not very large; therefore, the air valve is controlled to assist in discharging smoke or stop discharging smoke according to the size relation between the working power and the corresponding threshold value, the problems can be avoided or improved, and better use experience is provided.

Description

Technical Field

[0001] The present disclosure generally relates to the field of range fumes equipment control, and in particular to a method for controlling a damper, a damper controller, a central purification system, a computer-readable storage medium, and a computer program product. Background Art

[0002] Modern residential buildings generally utilize a shared flue system, centrally discharging cooking fumes from households on each floor. This system requires the installation of dampers to control cooking fume emissions at the kitchen flue opening on each floor. When a household's range hood is operating, the damper controller detects the hood's operating current and controls the damper to open, allowing cooking fumes to be discharged. Similarly, when the damper controller detects that the range hood's operating current is less than a preset threshold or zero, it controls the damper to close, halting cooking fume discharge.

[0003] At present, due to the increasing popularity of variable frequency range hoods, the working data generated by the range hood when it is in different working states (such as standby state and low air volume state) are relatively close, which leads to the problem of incorrect opening and closing of the air valve. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a control method for an air valve, an air valve controller, a central purification system, a computer-readable storage medium and a computer program product, which can more accurately control the air valve.

[0005] A first aspect provides a method for controlling a damper, the method being applied to a damper controller of a range hood, the method comprising:

[0006] Obtaining a target operating current and a target operating voltage of the range hood;

[0007] Obtaining a target operating power of the range hood according to the target operating current and the target operating voltage;

[0008] Controlling the air valve to assist in smoke exhaust based on the relationship between the target working power, the valve opening power threshold, and the valve closing power threshold;

[0009] or,

[0010] The air valve is controlled to stop exhausting smoke based on the magnitude relationship among the target working power, the valve opening power threshold and the valve closing power threshold.

[0011] A second aspect provides a damper controller, which includes a memory, a processor, a voltage acquisition module, a current acquisition module, and a drive module.

[0012] The power supply terminal of the voltage acquisition module is connected to the external power supply, and the signal output terminal is connected to the first signal input terminal of the processor; the power supply terminal of the current acquisition module is connected to the external power supply through the power conversion module, the signal input terminal is connected to the range hood, and the signal output terminal is connected to the second signal input terminal of the processor; the signal input terminal of the driving module is connected to the signal output terminal of the processor, and the signal output terminal is connected to the air valve;

[0013] The current acquisition module is used to acquire the target operating current of the range hood;

[0014] The voltage acquisition module is used to acquire the target operating voltage of the range hood;

[0015] The memory stores a computer program, and when the processor executes the computer program, the following is achieved:

[0016] Acquire the target operating current acquired by the current acquisition module and the target operating voltage acquired by the voltage acquisition module;

[0017] The target operating power of the range hood is obtained according to the target operating current and the target operating voltage, and based on the relationship between the target operating power, the valve opening power threshold and the valve closing power threshold stored in the memory, the driving module is instructed to control the air valve to assist in smoke exhaust or stop smoke exhaust.

[0018] The third aspect provides a central purification system, characterized in that it includes at least one terminal component, and the terminal component includes a range hood, a damper and the damper controller provided by the second aspect.

[0019] A fourth aspect provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the method of the first aspect when executed by a processor.

[0020] The fifth aspect provides a computer program product, comprising a computer program, characterized in that when the computer program is executed by a processor, the steps of the method of the first aspect are implemented.

[0021] The present application provides a control method for a damper, a damper controller, a central purification system, a computer-readable storage medium, and a computer program product, wherein the damper controller constantly obtains the target operating current and target operating voltage of the range hood, and calculates the target operating power of the range hood based on the target operating current and target operating voltage, and compares the target operating power with the valve opening power threshold and the valve closing power threshold, respectively, and determines whether to control the damper to assist in exhausting smoke or to stop exhausting smoke based on the magnitude relationship between the valve opening power threshold and the valve closing power threshold. The method control method provided by the present application is inversely proportional to the voltage and current values ​​of the range hood when it is working, that is, the greater the voltage, the smaller the current, and conversely, the smaller the voltage, the greater the current. If the current fluctuation of the range hood during operation is large, then whether to control the damper to assist in smoke exhaust or stop smoke exhaust is determined by the size relationship between the current and the current threshold. When the range hood is in different working states, there will be a problem of the damper being mistakenly switched on and off due to the similar working currents generated in different working states (for example, when the range hood is in standby state, the damper is controlled to be open; or, when the range hood is in low air volume operation, the damper is controlled to be closed). The present application controls whether to assist in smoke exhaust or stop smoke exhaust by the working power of the range hood. The working power of the range hood is inversely proportional to the voltage and current. Therefore, no matter how the voltage and current change, the obtained working power will be at a relatively constant value, and its fluctuation amplitude will not be large. Therefore, controlling the damper to assist in smoke exhaust or stop smoke exhaust by the size relationship between the working power and the corresponding threshold can avoid or improve the occurrence of the above-mentioned problems, thereby providing a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 A schematic diagram of the structure of a central purification system provided in one embodiment;

[0024] Figure 2 A schematic diagram of the internal structure of a damper controller provided in one embodiment;

[0025] Figure 3 A flowchart of a method for controlling a damper according to an embodiment;

[0026] Figure 4 A flowchart of a method for controlling a damper according to another embodiment;

[0027] Figure 5 A flowchart of the steps of a method for controlling an air valve provided in yet another embodiment. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] Please refer to Figure 1 , Figure 1 The central purification system provided in this application includes at least one terminal component, a main unit electrical control box, and a main unit. The terminal component includes a range hood, a damper, and a damper controller. The damper controller is capable of obtaining the operating current and voltage of the range hood, and based on the operating power derived from the operating current and voltage, determines whether the operating power is greater than a valve opening power threshold or less than a valve closing power threshold. Based on the comparison result, the damper controller controls the opening or closing of the damper, thereby enabling the damper to assist in exhaust or stop exhaust.

[0031] The following combination Figure 1 and Figure 2 , explain the internal structure of the air valve controller, such as Figure 2 As shown, the air valve controller includes a processor, a memory, a voltage acquisition module, a current acquisition module and a drive module.

[0032] The power supply end of the voltage acquisition module is connected to the external power supply, and the signal output end is connected to the first signal input end of the processor; the power supply end of the current acquisition module is connected to the external power supply through the power conversion module, the signal input end is connected to the range hood, and the signal output end is connected to the second signal input end of the processor; the signal input end of the drive module is connected to the signal output end of the processor, and the signal output end is connected to the air valve.

[0033] The voltage acquisition module may be a voltage acquisition circuit or a voltage collector, etc., which is not limited in this application.

[0034] The current acquisition module may also be a current acquisition circuit, or a current collector, etc., which is not limited in this application.

[0035] The driving module can also be a driving module or a driver, etc., and this application does not limit it.

[0036] The processor is, for example, a single-chip microcomputer, a processing chip, etc., which is not limited in this application.

[0037] The memory can be a short-term memory or a long-term memory, and this application does not limit this.

[0038] Based on the above connection relationship and Figure 1 It can be seen that the following combination Figure 3 Explain how the damper controller controls the damper to assist in exhausting smoke or stop exhausting smoke:

[0039] Step S301, collecting the target operating current of the range hood;

[0040] Among them, the external power supply is output to the load power socket through the current acquisition module. When the power cord of the range hood is connected to the load power socket, the external power supply can indirectly provide power to the range hood through the current acquisition module and the load power socket. The current acquisition module can collect the target working current of the range hood while providing power to the range hood.

[0041] Step S302, collecting the target operating voltage of the range hood;

[0042] The power supply for the range hood is provided by an external power supply, and one end of the voltage acquisition module is connected to the external power supply and can acquire the output voltage of the external power supply. The external power supply provides power for the operation of the range hood, so the target operating voltage of the range hood is obtained by acquiring the output voltage of the external power supply through the voltage acquisition module.

[0043] Step S303, acquiring the target operating current acquired by the current acquisition module and the target operating voltage acquired by the voltage acquisition module;

[0044] The other ends of the voltage acquisition module and the current acquisition module are both connected to the processor, and the acquired target operating current and target operating voltage can be sent to the processor. The processor can also obtain the target operating current and target operating voltage from the current acquisition module and the voltage acquisition module, which is not limited in this application.

[0045] Step S304, obtain the target operating power of the range hood according to the target operating current and the target operating voltage, and instruct the driving module to control the air valve to assist in smoke exhaust or stop smoke exhaust based on the target operating power, the valve opening power threshold and the valve closing power threshold stored in the memory.

[0046] After obtaining or receiving the target operating current and target operating voltage, the processor obtains the target operating power of the range hood by multiplying the target operating current and target operating voltage. After obtaining the target operating power of the range hood, the processor may retrieve a pre-stored valve opening power threshold and / or valve closing power threshold from a corresponding memory address, compare the target operating power with the valve opening power threshold and / or valve closing power threshold, and determine, based on the comparison result, whether to send an opening signal or a closing signal to the driver module, so that the damper driver module drives the damper to open or close a preset angle, thereby controlling the damper to perform auxiliary smoke exhaust or to stop exhausting smoke.

[0047] Optionally, the processor may control the damper to assist in smoke exhaust when the target operating power is greater than or equal to the valve opening power threshold and / or the valve closing power threshold, respectively. The specific operation of the processor controlling the damper to assist in smoke exhaust may, for example, include: the processor sending a valve opening signal to a drive module, and upon receiving the valve opening signal, the drive module providing power to a component controlling the opening and closing of the damper to open the damper to a first preset angle.

[0048] Optionally, when the processor determines that the target operating power is greater than or equal to the valve opening power threshold, it can also determine the first operating frequency of the driving module and encapsulate the first operating frequency of the driving module into the valve opening signal, so that the driving module operates according to the operating power determined by the processor, so that the air valve opens to a first preset angle.

[0049] Optionally, the processor may control the damper to stop exhausting smoke when the target operating power is less than or equal to the valve-closing power threshold and / or the valve-opening power threshold. The specific operation of the processor controlling the damper to stop exhausting smoke may, for example, include: the processor sending a valve-closing signal to a drive module, and upon receiving the valve-closing signal, the drive module discontinues powering a component controlling the opening and closing of the damper, thereby closing the damper to a second preset angle.

[0050] Optionally, when the processor determines that the target operating power is less than the valve closing power threshold, it can also determine the second operating frequency of the driving module and encapsulate the second operating frequency of the driving module into the valve closing signal, so that the driving module operates according to the second operating power determined by the processor, so that the air valve is closed to a second preset angle.

[0051] In an optional embodiment, the processor may, during operation, continuously obtain multiple target operating currents and multiple target operating voltages from the current acquisition module and the voltage acquisition module, and obtain multiple target operating powers based on the multiple target operating currents and target operating voltages. To avoid inaccurate calculations during the calculation process, the current acquisition module and the voltage acquisition module may add a collection time tag to each target operating current and target operating voltage when collecting the target operating current and target operating voltage, so that the processor can perform corresponding processing on the multiple target operating currents and target operating voltages.

[0052] In another optional embodiment, after obtaining multiple target operating powers, the processor may compare the multiple target operating powers with the valve opening power threshold and / or the valve closing power threshold, and determine whether to control the damper to assist in smoke exhaust or to stop smoke exhaust based on the multiple comparison results. Determining the control method for the damper based on the comparison results of multiple data can avoid or improve the situation where the method for determining the control method of the damper based on the instantaneous increase or decrease in current or voltage during the operation of the range hood causes inaccurate determination results, thereby achieving the technical effect of more accurate control of the damper.

[0053] Optionally, the processor may control the air valve to assist in smoke exhaust when multiple target operating powers are greater than or equal to a valve opening power threshold.

[0054] Optionally, the processor may control the air valve to stop exhausting smoke when multiple target operating powers are all less than or equal to the valve closing power threshold.

[0055] Optionally, the processor may control the air valve to assist in smoke exhaust when a preset proportion of target operating powers among multiple target operating powers are all greater than or equal to a valve opening power threshold.

[0056] Optionally, the processor may control the air valve to stop exhausting smoke when a preset proportion of target operating powers among multiple target operating powers are all less than or equal to the valve closing power threshold.

[0057] Optionally, after the processor obtains the target operating current and target operating voltage from time to time, it can process multiple target operating currents and multiple target operating voltages at intervals of a preset time length, and the preset time length is, for example, 1 minute, 2 minutes, 5 minutes, etc., which is not limited in this application.

[0058] The following combination Figure 4 A control method for a damper provided in this application is generally described, and the control method includes the following steps:

[0059] Step S401, the terminal component is powered on;

[0060] Step S402: The damper controller obtains multiple target operating currents and multiple target operating voltages of the range hood from time to time within a preset first time period.

[0061] Step S403: The damper controller calculates and obtains multiple target operating powers based on the multiple target operating currents and the multiple target operating voltages;

[0062] Step S404: the air valve controller reads the pre-stored valve opening power threshold and valve closing power threshold from the memory address;

[0063] Step S405: The damper controller compares the target operating powers with the valve opening power threshold and the valve closing power threshold respectively.

[0064] In step S406 , when the damper controller determines that the multiple target operating powers are all greater than or equal to the valve opening power threshold, the damper controller controls the damper to assist in exhausting smoke.

[0065] The present application provides a method for controlling a damper, wherein the damper controller constantly obtains the target operating current and target operating voltage of the range hood, calculates the target operating power of the range hood based on the target operating current and target operating voltage, compares the target operating power with a valve opening power threshold and a valve closing power threshold, and determines whether to control the damper to assist in exhausting smoke or to stop exhausting smoke based on the magnitude relationship between the valve opening power threshold and the valve closing power threshold. The method control method provided by the present application is inversely proportional to the voltage and current values ​​of the range hood when it is operating, that is, the greater the voltage, the smaller the current, and conversely, the smaller the voltage, the greater the current. If the current fluctuation of the range hood during operation is large, then whether to control the damper to assist in smoke exhaust or stop smoke exhaust is determined by the size relationship between the current and the current threshold. When the range hood is in different working states, there will be a problem of the damper being mistakenly switched on and off due to the similar working currents generated in different working states (for example, when the range hood is in standby state, the damper is controlled to be open; or, when the range hood is in low air volume operation, the damper is controlled to be closed). The present application controls whether to assist in smoke exhaust or stop smoke exhaust by the working power of the range hood. The working power of the range hood is inversely proportional to the voltage and current. Therefore, no matter how the voltage and current change, the obtained working power will be at a relatively constant value, and its fluctuation amplitude will not be large. Therefore, controlling the damper to assist in smoke exhaust or stop smoke exhaust by the size relationship between the working power and the corresponding threshold can avoid or improve the occurrence of the above-mentioned problems, thereby providing a better user experience.

[0066] Based on the above description of the control method of the air valve, continue as follows Figure 2As shown, the present application also provides a communication module, through which the air valve controller can exchange data with other terminal devices. The following is an exemplary description of an optional interaction process between the air valve controller and the terminal device. In addition, the method is described as an example in which the air valve controller modifies the pre-stored valve opening power threshold and valve closing power threshold based on the modification instruction of the terminal device:

[0067] Before explaining the interactive process, the modification of the pre-set valve opening power threshold and valve closing power threshold is explained:

[0068] The first method requires professional personnel to use specialized adjustment instruments (such as potentiometers) to perform adjustments. This method can only appropriately adjust the valve opening and closing power thresholds based on the professional's experience. However, due to the diversity of brands and functions of range hoods on the market, this adjustment method cannot provide a more appropriate adjustment for the valve opening and closing power thresholds, resulting in the damper opening and closing being erroneously caused.

[0069] The second method involves adjusting the pre-stored open and close power thresholds on the damper controller. However, since damper controllers are typically mounted on the ceiling, adjusting these thresholds requires dismantling the ceiling and other components before reinstalling them. This method can easily damage the external environment, is time-consuming, and labor-intensive, and results in high maintenance costs.

[0070] Based on the problems existing in the existing methods for adjusting the valve opening power threshold and the valve closing power threshold, the present application provides a method for adjusting the valve opening power threshold and the valve closing power threshold, such as Figure 5 As shown, the method includes the following steps:

[0071] Step S501: The communication module of the air valve controller establishes a binding relationship with the communication module of the terminal device;

[0072] Step S502: The damper controller sends the initial valve opening power threshold and the initial valve closing power threshold stored in the current memory address to the terminal device via the communication module;

[0073] Step S503: After receiving the initial valve opening power threshold and the initial valve closing power threshold, the terminal device determines whether the initial valve opening power threshold and the initial valve closing power need to be modified according to the modified valve opening power threshold and / or modified valve closing power threshold input by the user;

[0074] Step S504: When the terminal device determines that modification is required, it generates a threshold modification instruction, encapsulates the modified valve opening power threshold and / or modified valve closing power threshold into the threshold modification instruction, and sends the threshold modification instruction to the damper controller;

[0075] Step S505: After receiving the threshold modification instruction sent by the terminal device, the damper controller parses the threshold modification instruction, obtains a modified valve opening power threshold and / or a modified valve closing power threshold, and updates the initial valve opening power threshold and / or the initial valve closing power to the corresponding modified valve opening power threshold and / or modified valve closing power threshold;

[0076] Step S506: After executing step S505, the damper controller sends a message indicating that the modification has been made to the terminal device;

[0077] Step S507: After the damper controller sends a message indicating modification to the terminal device, if the latest threshold modification instruction sent by the terminal device is not received within a preset time period, the connection between the communication module and the communication module of the terminal device is disconnected;

[0078] Step S508: After the damper controller sends a message indicating modification to the terminal device, if the latest threshold modification instruction is received, the valve opening power threshold and / or valve closing power threshold currently stored in the damper controller is updated according to the instruction of the latest threshold modification instruction.

[0079] It should be noted here that after purchasing and installing the terminal components, the user can obtain the modified valve opening power threshold and / or modified valve closing power threshold through multiple tests during the use of the terminal components. Of course, the user can also obtain the modified valve opening power threshold and / or modified valve closing power threshold through other means, and this application does not limit this.

[0080] Optionally, after using the terminal component for a period of time, the user can continue to obtain a new modified valve opening power threshold and / or a new modified valve closing power threshold through multiple tests, so that the new modified valve opening power threshold and / or the new modified valve closing power threshold better matches the current internal parameters of the terminal component, which is more helpful for the air valve controller to accurately control the air valve to assist smoke exhaust or stop smoke exhaust.

[0081] The control method for the air valve provided in the present application sets a communication module for the air valve controller and is able to establish a communication connection with the terminal device, so that the user can use the terminal device to quickly and conveniently make targeted modifications to the valve opening power threshold and valve closing power threshold stored in the air valve controller, saving time and effort, and does not require the assistance of the external environment where the terminal device is located, so no subsequent maintenance is required, saving costs.

[0082] It should be noted that although the operations of the present invention are described in a particular order in the accompanying drawings, this does not require or imply that these operations must be performed in this particular order, or that all the operations shown must be performed to achieve the desired results. On the contrary, the steps depicted in the flowchart can be performed in a different order.

[0083] In particular, according to the embodiments of the present disclosure, the above reference Figure 3 The described processes may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program comprising instructions for executing Figure 3 In such an embodiment, the computer program may be downloaded and installed from a network, and / or installed from a removable medium.

[0084] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the module, program segment, or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of the boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0085] The units or modules involved in the embodiments described in this application may be implemented by software or hardware. The units or modules described may also be provided in a processor. For example, it may be described as follows: a processor includes unit XX, unit YY, and unit ZZ. The names of these units or modules do not, in certain circumstances, constitute limitations on the units or modules themselves. For example, unit XX may also be described as a "unit for XX."

[0086] As another aspect, the present application further provides a computer-readable storage medium, which may be the computer-readable storage medium included in the apparatus described in the above embodiments, or a separate computer-readable storage medium not incorporated into the apparatus. The computer-readable storage medium stores one or more programs, which are used by one or more processors to execute the formula input method described in the present application.

[0087] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A method for controlling a damper, characterized in that: The control method is applied to a damper controller of a range hood, and the method comprises: Obtaining a target operating current and a target operating voltage of the range hood; Obtaining a target operating power of the range hood according to the target operating current and the target operating voltage; Controlling the air valve to assist in smoke exhaust based on the magnitude relationship among the target working power, the valve opening power threshold, and the valve closing power threshold; Alternatively, the damper is controlled to stop exhausting smoke based on the relationship between the target working power, the valve opening power threshold and the valve closing power threshold.

2. The control method according to claim 1, characterized in that: The controlling the air valve to assist in smoke exhaust or stop smoke exhaust based on the magnitude relationship between the target working power, the valve opening power threshold and the valve closing power threshold comprises: If the magnitude relationship is that the target working power is greater than or equal to the valve opening power threshold, then controlling the air valve to assist in smoke exhaust; If the size relationship is that the target working power is less than or equal to the valve closing power threshold, the air valve is controlled to stop exhausting smoke.

3. The control method according to claim 1, characterized in that: The target working power includes multiple ones, and the controlling of the air valve to assist smoke exhaust or stop smoke exhaust based on the magnitude relationship between the target working power, the valve opening power threshold and the valve closing power threshold includes: If the magnitude relationship is that the multiple target working powers are all greater than or equal to the valve opening power threshold, then controlling the air valve to assist in smoke exhaust; If the magnitude relationship is that the multiple target working powers are all less than or equal to the valve closing power threshold, the air valve is controlled to stop exhausting smoke.

4. The control method according to claim 1, characterized in that: The air valve controller further includes a communication module, and the method further includes: Receive a threshold modification instruction sent by a terminal device, wherein the threshold modification instruction is used to instruct to modify the currently stored valve opening power threshold and / or the valve closing power threshold, and the threshold modification instruction carries the modification of the valve opening power threshold and / or the modification of the valve closing power threshold; The currently stored valve opening power threshold and / or valve closing power threshold are updated to the modified valve opening power threshold and / or the modified valve closing power threshold according to the threshold modification instruction.

5. The control method according to claim 4, characterized in that: The method further comprises: After updating the currently stored valve opening power threshold and / or valve closing power threshold to the modified valve opening power threshold and / or the modified valve closing power threshold according to the threshold modification instruction, returning a modified message to the terminal device; determining whether a latest threshold modification instruction sent by the terminal device is received within a preset time period after returning the modified message to the terminal device; If not, disconnect the terminal device.

6. A damper controller, characterized in that: The air valve controller includes a memory, a processor, a voltage acquisition module, a current acquisition module and a drive module. The power supply end of the voltage acquisition module is connected to the external power supply, and the signal output end is connected to the first signal input end of the processor; the power supply end of the current acquisition module is connected to the external power supply through the power conversion module, the signal input end is connected to the range hood, and the signal output end is connected to the second signal input end of the processor; the signal input end of the drive module is connected to the signal output end of the processor, and the signal output end is connected to the air valve; The current acquisition module is used to acquire the target operating current of the range hood; The voltage acquisition module is used to acquire the target operating voltage of the range hood; The memory stores a computer program, and when the processor executes the computer program, the following is achieved: Acquire the target operating current acquired by the current acquisition module and the target operating voltage acquired by the voltage acquisition module; Obtaining a target operating power of the range hood according to the target operating current and the target operating voltage, and instructing the driving module to control the air valve to assist in smoke exhaust based on the target operating power, the valve opening power threshold, and the valve closing power threshold stored in the memory; Alternatively, based on the target working power, the valve opening power threshold and the valve closing power threshold stored in the memory, the driving module is instructed to control the air valve to stop exhausting smoke.

7. The air valve controller according to claim 6, characterized in that: The air valve controller further includes a communication module, and the communication module is connected to the processor.

8. A central purification system, characterized in that: It comprises at least one terminal component, and the terminal component comprises a range hood, a damper and a damper controller as described in any one of claims 6 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

Images