Intelligent dynamic cleaning control system and method and storage medium

Abstract

The invention discloses an intelligent dynamic cleaning control system and method and a storage medium. The intelligent dynamic cleaning control system comprises a water bucket, a cleaning pump, a liquid distributor and a plurality of cleaning channels. Each cleaning channel consists of a water conveying pipeline, and a proportional electromagnetic valve, a flow meter and a plunger pump which are arranged on the water conveying pipeline; a water inlet of the water conveying pipeline is communicated with a water outlet of the liquid distributor; a water outlet of the plunger pump is communicated with the sampling needle; the water inlet of the liquid distributor is communicated with the water outlet of the cleaning pump. The water inlet of the cleaning pump is communicated with the inner cavity of the bucket. By dynamically and intelligently adjusting the flow of the plurality of cleaning channels, the cleaning quality of the sample adding needle of each cleaning channel is ensured, meanwhile, the performance identification and adjustment of each cleaning channel are realized, and the cleaning consistency of the sample adding needle of each cleaning channel and the continuity of the test experiment of the immunity analyzer are ensured.

Description

Technical Field

[0001] This invention relates to in vitro diagnostic devices (IVD), and more particularly to an intelligent dynamic cleaning control system and method, and a storage medium. Background Technology

[0002] The cleaning of the sampling needles (pipe and injection needles) of an immunoassay analyzer is automatically completed by the instrument's built-in cleaning system. Since the cleaning process cannot be manually performed for retesting, it may result in incomplete cleaning or even contamination (i.e., a positive sample from the previous test is carried into the next test, leading to consecutive positive results), especially for multi-channel cleaning systems. To address these issues, current methods often involve controlling the flow rate of the cleaning channel (tubing) to adjust the flow resistance and ensure the quality of needle cleaning.

[0003] Chinese utility model patent CN212623759U discloses a real-time automatic flow rate adjustment system. Its technical solution involves comparing the electrical signal from the flow sensor data receiving circuit with a set threshold value, controlling pump performance through set potential parameters, and adjusting the flow resistance of the cleaning channel by identifying these potential parameters to ensure the cleaning quality of the sample needle. However, this solution cannot address changes in flow resistance caused by micro-blockage of the sample needle in each cleaning channel, bacterial growth in the tubing, or flow rate reduction due to pump performance degradation, leading to differences in cleaning between cleaning channels. For complex and variable system conditions, it cannot achieve dynamic adjustment and is still prone to carryover during cleaning, resulting in erroneous test results.

[0004] Chinese utility model patent CN212134718U discloses a pressure-stabilizing liquid circuit cleaning control system. Its technical solution is to indirectly control the system pressure by using branch backflow, which results in most of the pump's flow performance being wasted by the branch cleaning channels, causing a waste of pump motor power. At the same time, it cannot dynamically respond to changes in flow resistance in each cleaning channel, and when a problem occurs in a certain cleaning channel, the system cannot automatically identify it, causing the test experiment process to be unable to continue and affecting the efficiency of the test experiment.

[0005] In particular, when the technical solutions in the aforementioned comparative documents 1 and 2 are used in high-speed immunoassay analyzers (which can perform more than 600 tests per hour), if a problem such as needle blockage or collision occurs in one or more cleaning channels, it is impossible to identify and adjust the flow rate in a timely manner, resulting in discontinuous testing of the immunoassay analyzer and reducing the working efficiency of the immunoassay analyzer. Summary of the Invention

[0006] In view of this, the present invention provides an intelligent dynamic cleaning control system and method, and a storage medium, which realizes dynamic adjustment of cleaning channel flow and intelligent identification of cleaning channel faults, thereby improving the continuity and efficiency of in vitro diagnostic equipment testing experiments.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: The intelligent dynamic cleaning control system of this invention includes a water tank, a cleaning pump, a liquid distributor, and multiple cleaning channels. Each cleaning channel consists of a water supply pipe and a proportional solenoid valve, a flow meter, and a plunger pump sequentially arranged along the water flow direction. The inlet of each water supply pipe is connected to one outlet of the liquid distributor, and the outlet of each plunger pump is connected to a corresponding sampling needle. The inlet of the liquid distributor is connected to the outlet of the cleaning pump via an inlet pipe, which contains a pressure sensor and a filter. The inlet of the cleaning pump is connected to the inner cavity of the water tank. The control input terminals of the cleaning pump, the proportional solenoid valve, and the plunger pump are each connected to a corresponding control output terminal of a microcontroller. The signal output terminals of the flow meter and the pressure sensor are each connected to the signal input terminal of the microcontroller.

[0008] Optionally, a pressure relief pipe is provided between the outlet of the cleaning pump and the inner cavity of the water tank, and a pressure relief solenoid valve is provided on the pressure relief pipe. The control input terminal of the pressure relief solenoid valve is connected to a corresponding control output terminal of the microcontroller.

[0009] Optionally, a liquid level detection sensor is installed inside the water tank, and the signal output terminal of the liquid level detection sensor is connected to the signal input terminal of the microcontroller; when the purified water level in the water tank is lower than the set value, the external purified water pump is controlled to turn on to add purified water to the water tank; when the purified water level in the water tank reaches the set high water level, the external purified water pump is turned off to stop adding purified water to the water tank.

[0010] Alternatively, the flow meter is an impeller-type flow meter, which generates a flow signal by proportionally rotating the impeller when water flows through it, and outputs the flow signal to the microcontroller.

[0011] Alternatively, the pressure sensor is a diaphragm pressure sensor, which reads the pressure signal by the AD value generated by the deformation of the diaphragm when water flows through it, and outputs the pressure signal to the microcontroller.

[0012] The intelligent dynamic cleaning control method of the present invention includes the following steps: Step 1, System self-check: Within a set time after the start command is issued, if the current pressure value detected by the pressure sensor is less than the set pressure value P0 at the outlet of the cleaning pump, or the current speed of the cleaning pump is less than the set speed, the microcontroller issues a control command to shut down the cleaning pump and restart it; if the restart is repeated a set number of times and the above judgment condition is still not met, the cleaning system is prompted to be abnormal and the cleaning system is shut down; if the above judgment condition is met, the cleaning system enters the cleaning process. Step 2, Intelligent Detection: During the cleaning process, the microcontroller reads the current flow rate Q of each cleaning channel in real time through the flow meters in each cleaning channel. i By controlling the opening degree K of the proportional solenoid valves in each cleaning channel i This makes the current flow rate Q of each cleaning channel... i = Initial flow rate Q for branch 0i The opening degree K of the proportional solenoid valve in each cleaning channel i The calculation formula is as follows: ; In the formula: K 0i The initial opening value for the i-th cleaning channel; Q 0i Set the initial flow rate value for the i-th cleaning channel; i is a natural number greater than zero; Step 3, Intelligent Dynamic Adjustment: The microcontroller reads the pressure sensor's detection value in real time and determines whether it is within the set threshold of the standard pressure value P; The formula for calculating the standard pressure value P is as follows: ; In the formula: P0 is the set pressure value at the inlet of the liquid distributor; P represents the standard pressure value; n is a natural number ≥ i; Step 3.1: When the pressure sensor detects a value within the set threshold of the standard pressure value P, the normal cleaning process begins. Step 3.2.1: When the pressure sensor detects a value less than the set threshold of the standard pressure value P, control the speed control potentiometer of the cleaning pump to increase the speed of the cleaning pump. If the pressure sensor detects a value within the set threshold of the standard pressure value P after increasing the speed of the cleaning pump, exit the speed control process of the cleaning pump and enter the cleaning process. Step 3.2.2: If the pressure sensor reading is still not within the set threshold of the standard pressure value P after increasing the cleaning pump speed, the microcontroller reads the cleaning pump speed value S. If X≤S≤Y, the cleaning pump speed is increased further until the pressure sensor reading is within the set threshold of the standard pressure value P. If S<X or S>Y after further increasing the cleaning pump speed, the pressure relief solenoid valve is opened, and the cleaning system enters pressure relief protection mode. X is the set lower limit of the cleaning pump speed, and Y is the set upper limit of the cleaning pump speed. Step 3.3.1: When the pressure sensor detects a value greater than the set threshold of the standard pressure value P, control the speed adjustment potentiometer of the cleaning pump to reduce the speed of the cleaning pump. If the pressure sensor detects a value within the set threshold of the standard pressure value P after reducing the speed of the cleaning pump, exit the speed adjustment process of the cleaning pump and enter the cleaning process. Step 3.3.2: If the pressure sensor reading is still not within the set threshold of the standard pressure value P after reducing the cleaning pump speed, the microcontroller reads the cleaning pump speed value S. If X≤S≤Y, the cleaning pump speed is further reduced until the pressure sensor reading is within the set threshold of the standard pressure value P. If S<X or S>Y after further reducing the cleaning pump speed, the pressure relief solenoid valve is opened, and the cleaning system enters the pressure relief protection mode.

[0013] Optionally, if the cleaning pump speed S is less than the lower limit X of the cleaning pump speed and the pressure sensor detection value is still not within the set threshold of the standard pressure value P, then the pressure sensor is determined to be faulty; if the cleaning pump speed S is greater than the upper limit Y of the cleaning pump speed and the pressure sensor detection value is still not within the set threshold of the standard pressure value P, then the filter is determined to be clogged.

[0014] The storage medium of the present invention stores a computer program, which, when executed by a microcontroller processor, implements the steps of the intelligent dynamic cleaning control method as described in claim 5.

[0015] This invention, through dynamic and intelligent adjustment of the flow rate of multiple cleaning channels, not only ensures the cleaning quality of the sample needles in each cleaning channel, but also realizes the performance identification and adjustment of each cleaning channel, such as changes in system flow resistance caused by micro-blockage of the sample needle, bacterial growth in the tubing, and flow rate reduction caused by the performance degradation of the cleaning pump itself; thus ensuring the consistency of sample needle cleaning in each cleaning channel and the continuity of immunoassay analyzer testing experiments.

[0016] This invention encompasses a complete closed-loop dynamic control logic for the cleaning system, from startup self-testing to system adjustment, fault diagnosis, handling, and protection. Compared with existing technologies, it has the following advantages: 1. Solved the performance problems caused by external interference during the testing process and realized automatic adjustment during the testing process; 2. This invention solves the problem of uneven pressure when different cleaning channels are opened and closed, ensuring consistency between channels and ensuring cleaning efficiency; 3. In the event of a malfunction in the cleaning system, each cleaning channel was promptly identified to ensure the continuity of the testing experiments. 4. The cleaning pump speed is automatically adjusted according to the needs of each cleaning channel, which effectively reduces the waste of redundant performance of the cleaning pump and realizes energy saving and consumption reduction of the cleaning system. 5. By combining the cleaning pump speed with the pressure sensor, not only is the cleaning system protected from damage, but it can also assist manual labor in quickly locating faults and reducing troubleshooting time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the intelligent dynamic cleaning control system described in this invention.

[0018] Figure 2 This is a flowchart of the control method for the intelligent dynamic cleaning control system described in this invention. Detailed Implementation

[0019] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given. However, the scope of protection of the present invention is not limited to the following embodiments.

[0020] It should be noted that, in the description of this invention, relational terms such as “first” and “second” are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] like Figure 1As shown, the intelligent dynamic cleaning control system of the present invention includes a water tank 1, a cleaning pump 2, a liquid distributor 3, and six cleaning channels. Each cleaning channel consists of a water supply pipe 4 and a proportional solenoid valve 5, a flow meter 6, and a plunger pump 7 arranged sequentially along the water flow direction on the water supply pipe 4. The inlet of each water supply pipe 4 is connected to one outlet of the liquid distributor 3, and the outlet of each plunger pump 7 is connected to a sampling needle 8. The inlet of the liquid distributor 3 is connected to the outlet of the cleaning pump 2 through an inlet pipe 9. A filter 11 is installed in the inlet of the liquid distributor 3, and a pressure sensor 10 is installed at the inlet of the liquid distributor 3. The inlet of the cleaning pump 2 is connected to the inner cavity of the water tank 1. The control input terminals of the cleaning pump 2, the proportional solenoid valve 5, and the plunger pump 7 are respectively connected to a corresponding control output terminal of the microcontroller. The signal output terminals of the flow meter 6 and the pressure sensor 10 are respectively connected to the signal input terminal of the microcontroller.

[0023] Advantageously or exemplary, a pressure relief pipe 12 is provided between the outlet of the cleaning pump 2 and the inner cavity of the water tank 1. A pressure relief solenoid valve 13 is provided on the pressure relief pipe 12. The control input terminal of the pressure relief solenoid valve 13 is connected to a corresponding control output terminal of the microcontroller.

[0024] Advantageously or exemplary, a liquid level detection sensor 14 is provided inside the water tank 1, and the signal output terminal of the liquid level detection sensor 14 is connected to the signal input terminal of the microcontroller; when the purified water level in the water tank 1 is lower than the set value, the external purified water pump is controlled to turn on to add purified water into the water tank 1; when the purified water level in the water tank 1 reaches the set high water level, the external purified water pump is turned off and the addition of purified water into the water tank 1 is stopped.

[0025] Advantageously or exemplary, the flow meter 6 is an impeller-type flow meter that generates a flow signal by proportionally generating pulses of impeller rotation when water flows through it, and outputs the flow signal to the microcontroller.

[0026] Advantageously or exemplaryly, the pressure sensor is a diaphragm pressure sensor that reads the pressure signal by the AD value generated by the deformation of the diaphragm when water flows through it, and outputs the pressure signal to the microcontroller.

[0027] The intelligent dynamic cleaning control method described in this invention, such as Figure 1 , 2 As shown, it includes the following steps: Step 1, System self-check: Within three seconds after the start command is issued, if the current pressure value detected by pressure sensor 10 is less than the set pressure value P0 at the outlet of cleaning pump 2, or the current speed of cleaning pump 2 is less than the set speed, the microcontroller issues a control command to shut down cleaning pump 2 and restart it; if the above judgment conditions are not met after restarting and repeating the set number of times (usually three times), the cleaning system will be prompted as abnormal and shut down; if the above judgment conditions are met, the cleaning system will enter the cleaning process. Step 2, Intelligent Detection: During the cleaning process, the microcontroller reads the current flow rate Q of each cleaning channel in real time through the flow meter 6 of each cleaning channel. i By controlling the opening degree K of the proportional solenoid valve 5 in each cleaning channel i This makes the current flow rate Q of each cleaning channel... i =The initial flow rate Q of the cleaning channel is set. 0i The opening degree K of the proportional solenoid valve in each cleaning channel i The calculation formula is as follows: ; In the formula: K 0i The initial opening value for the i-th cleaning channel; Q 0i Set the initial flow rate value for the i-th cleaning channel; i is a natural number between 1 and 6; Step 3, Intelligent Dynamic Adjustment: The microcontroller reads the detection value of the pressure sensor 10 in real time and determines whether it is within the set threshold of the standard pressure value P; The formula for calculating the standard pressure value P is as follows: ; In the formula: P0 is the set pressure value at the inlet of the liquid distributor 3; P represents the current standard pressure value; Step 3.1: When the pressure sensor 10 detects a value within the set threshold of the standard pressure value P, the normal cleaning process begins. Step 3.2.1: When the value detected by the pressure sensor 10 is less than the set threshold of the standard pressure value P, the speed control potentiometer of the cleaning pump 2 is controlled to increase the speed of the cleaning pump. If the value detected by the pressure sensor 10 is within the set threshold of the standard pressure value P after the speed of the cleaning pump is increased, the cleaning pump speed control process is exited and the cleaning process is entered. Step 3.2.2: If the pressure sensor 10 value is still not within the set threshold of the standard pressure value P after increasing the cleaning pump speed, the microcontroller reads the cleaning pump speed value S. If X≤S≤Y, the cleaning pump speed is increased until the pressure sensor 10 value is within the set threshold of the standard pressure value P. If S<X or S>Y after increasing the cleaning pump speed, the pressure relief solenoid valve 13 is opened, and the cleaning system enters pressure relief protection. X is the set lower limit of the cleaning pump speed, and Y is the set upper limit of the cleaning pump speed. Step 3.3.1: When the pressure sensor 10 detects a value greater than the set threshold of the standard pressure value P, the speed control potentiometer of the cleaning pump 10 is controlled to reduce the speed of the cleaning pump. If the detection value of the pressure sensor 10 is within the set threshold of the standard pressure value P after the speed of the cleaning pump is reduced, the cleaning pump speed control process is exited and the cleaning process is entered. Step 3.3.2: If the pressure sensor 10's detection value is still not within the set threshold of the standard pressure value P after reducing the cleaning pump speed, the microcontroller reads the cleaning pump speed value S. If X≤S≤Y, the cleaning pump speed is further reduced until the pressure sensor's detection value is within the set threshold of the standard pressure value P. If S<X or S>Y after further reducing the cleaning pump speed, the pressure relief solenoid valve 13 is opened, and the cleaning system enters pressure relief protection.

[0028] In this invention, the standard pressure P of each cleaning channel is determined by the opening degree K of the proportional solenoid valve 5 of each cleaning channel. i The decision is made that the proportional solenoid valve 5 of each cleaning channel will be based on the initial set flow rate Q of its respective cleaning channel. 0i Adjust the opening to ensure a stable and consistent flow rate in each cleaning channel. The purpose is to reduce uneven flow and inconsistent cleaning results caused by differences between cleaning channels (i.e., assembly differences, hardware differences, valve block interface differences).

[0029] Beneficially or exemplaryly, if the cleaning pump speed S is less than the lower limit X of the cleaning pump speed and the detection value of the pressure sensor 10 is still not within the set threshold of the standard pressure value P, then the pressure sensor 10 is determined to be faulty; if the cleaning pump speed S is greater than the upper limit Y of the cleaning pump speed and the detection value of the pressure sensor is still not within the set threshold of the standard pressure value P, then the filter 11 is determined to be clogged.

[0030] The storage medium of the present invention stores a computer program, which, when executed by a microcontroller processor, implements the steps of the intelligent dynamic cleaning control method as described in claim 5.

[0031] During normal operation of this invention, purified water is drawn from water tank 1 by cleaning pump 2, and then pumped to different cleaning channels through filter 11 and liquid distributor 3. When a designated cleaning channel receives a cleaning request, the microcontroller controls the proportional solenoid valve 5 of that cleaning channel to open, perform high-pressure cleaning on the sample needle 8, and discharge the cleaning wastewater into the cleaning tank 15.

[0032] Finally, it should be emphasized that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent dynamic cleaning control system, characterized in that: The system includes a water tank, a cleaning pump, a liquid distributor, and multiple cleaning channels. Each cleaning channel consists of a water supply pipe and a proportional solenoid valve, a flow meter, and a plunger pump sequentially arranged along the water flow direction. The inlet of each water supply pipe is connected to one outlet of the liquid distributor, and the outlet of each plunger pump is connected to a corresponding sampling needle. The inlet of the liquid distributor is connected to the outlet of the cleaning pump via an inlet pipe, which contains a pressure sensor and a filter. The inlet of the cleaning pump is connected to the inner cavity of the water tank. The control inputs of the cleaning pump, proportional solenoid valve, and plunger pump are each connected to a corresponding control output of a microcontroller. The signal outputs of the flow meter and pressure sensor are connected to the signal input of the microcontroller.

2. The intelligent dynamic cleaning control system according to claim 1, characterized in that: A pressure relief pipe is provided between the outlet of the cleaning pump and the inner cavity of the water tank. A pressure relief solenoid valve is provided on the pressure relief pipe. The control input terminal of the pressure relief solenoid valve is connected to a corresponding control output terminal of the microcontroller. Optionally, a liquid level detection sensor is installed inside the water tank, and the signal output terminal of the liquid level detection sensor is connected to the signal input terminal of the microcontroller.

3. The intelligent dynamic cleaning control system according to claim 1 or 2, characterized in that: The flow meter is an impeller flow meter.

4. The intelligent dynamic cleaning control system according to claim 1 or 2, characterized in that: The pressure sensor is a diaphragm pressure sensor.

5. The control method of the intelligent dynamic cleaning control system according to claim 1, characterized in that: Includes the following steps: Step 1, System self-check: Within a set time after the start command is issued, if the current pressure value detected by the pressure sensor is less than the set pressure value P0 at the outlet of the cleaning pump, or the current speed of the cleaning pump is less than the set speed, the microcontroller issues a control command to shut down the cleaning pump and restart it; if the restart is repeated a set number of times and the above judgment condition is still not met, the cleaning system is prompted to be abnormal and the cleaning system is shut down; if the above judgment condition is met, the cleaning system enters the cleaning process. Step 2, Intelligent Detection: During the cleaning process, the microcontroller reads the current flow rate Q of each cleaning channel in real time through the flow meters in each cleaning channel. i By controlling the opening degree K of the proportional solenoid valves in each cleaning channel i This makes the current flow rate Q of each cleaning channel... i = Initial flow rate Q for branch 0i The opening degree K of the proportional solenoid valve in each cleaning channel i The calculation formula is as follows: ； In the formula: K 0i The initial opening value for the i-th cleaning channel; Q 0i Set the initial flow rate value for the i-th cleaning channel; i is a natural number greater than zero; Step 3, Intelligent Dynamic Adjustment: The microcontroller reads the pressure sensor's detection value in real time and determines whether it is within the set threshold of the standard pressure value P; The formula for calculating the standard pressure value P is as follows: ； In the formula: P0 is the set pressure value at the inlet of the liquid distributor; P represents the standard pressure value; n is a natural number ≥ i; Step 3.1: When the pressure sensor detects a value within the set threshold of the standard pressure value P, the normal cleaning process begins. Step 3.2.1: When the pressure sensor detects a value less than the set threshold of the standard pressure value P, control the speed control potentiometer of the cleaning pump to increase the speed of the cleaning pump. If the pressure sensor detects a value within the set threshold of the standard pressure value P after increasing the speed of the cleaning pump, exit the speed control process of the cleaning pump and enter the cleaning process. Step 3.2.2: If the pressure sensor reading is still not within the set threshold of the standard pressure value P after increasing the cleaning pump speed, the microcontroller reads the cleaning pump speed value S. If X≤S≤Y, the cleaning pump speed is increased further until the pressure sensor reading is within the set threshold of the standard pressure value P. If S<X or S>Y after further increasing the cleaning pump speed, the pressure relief solenoid valve is opened, and the cleaning system enters pressure relief protection mode. X is the set lower limit of the cleaning pump speed, and Y is the set upper limit of the cleaning pump speed. Step 3.3.1: When the pressure sensor detects a value greater than the set threshold of the standard pressure value P, control the speed adjustment potentiometer of the cleaning pump to reduce the speed of the cleaning pump. If the pressure sensor detects a value within the set threshold of the standard pressure value P after reducing the speed of the cleaning pump, exit the speed adjustment process of the cleaning pump and enter the cleaning process. Step 3.3.2: If the pressure sensor reading is still not within the set threshold of the standard pressure value P after reducing the cleaning pump speed, the microcontroller reads the cleaning pump speed value S. If X≤S≤Y, the cleaning pump speed is further reduced until the pressure sensor reading is within the set threshold of the standard pressure value P. If S<X or S>Y after further reducing the cleaning pump speed, the pressure relief solenoid valve is opened, and the cleaning system enters the pressure relief protection mode.

6. The control method of the intelligent dynamic cleaning control system according to claim 5, characterized in that: If the cleaning pump speed S is less than the lower limit X of the cleaning pump speed, and the pressure sensor detection value is still not within the set threshold of the standard pressure value P, then the pressure sensor is determined to be faulty; if the cleaning pump speed S is greater than the upper limit Y of the cleaning pump speed, and the pressure sensor detection value is still not within the set threshold of the standard pressure value P, then the filter is determined to be clogged.

7. A computer storage medium, characterized in that, The computer storage medium stores a computer program, which, when executed by a microcontroller processor, implements the steps of the control method as described in claim 5.

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