Ultrasonic intelligent cleaning device and control method thereof

Abstract

The application discloses an ultrasonic intelligent cleaning equipment and a control method thereof. The ultrasonic intelligent cleaning equipment comprises a rack and a structure module, a water and gas supply and temperature control module, a circulation and filtration module, a cleaning and execution module, a drainage module and a control and interaction module. The application is characterized in that a multi-parameter detection unit comprising an electric conductivity probe, a turbidity probe and a granularity probe is integrated, and cooperates with a controller to realize intelligent closed-loop control of the cleaning process. Through a man-machine interface, a user can select multiple modes such as ultrasonic cleaning, mixed cleaning and self-cleaning. The control method automatically judges the cleaning end point based on comparison of real-time monitored water quality data and a preset threshold value, and can perform safety protection according to the number of cycles. The application effectively overcomes problems of traditional cleaning machines, such as dependence on manual experience, unstable cleaning effect, serious waste of water resources and energy and the like, and significantly improves the cleaning efficiency, the degree of automation and the cleaning quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial cleaning, and in particular to an ultrasonic intelligent cleaning device and a control method thereof. BACKGROUND

[0002] Ultrasonic cleaning technology is widely used in industries, medical treatment, laboratories and other fields for removing dirt, oil and particulate matter from the surface of objects. Traditional ultrasonic cleaning machines usually adopt fixed cleaning programs, lack real-time monitoring and feedback control of water quality parameters, resulting in unstable cleaning effect and possible over-cleaning or under-cleaning. In addition, many cleaning machines cannot automatically adjust cleaning parameters according to water quality changes during the cleaning process, causing waste of water resources and energy. In the prior art, some cleaning machines attempt to integrate a filtration system, but often have complex structures, are inconvenient to maintain, and lack intelligent control functions.

[0003] For example, some ultrasonic cleaning machines only rely on timed cleaning and cannot adjust the cleaning time according to the actual dirt level; other cleaning machines have a filtration device, but the filtration effect is limited and the water quality cannot be monitored in real time. The waste water after cleaning is often directly discharged without a recycling mechanism, increasing operating costs and environmental impact. In addition, existing equipment usually lack self-cleaning functions, resulting in dirt accumulation inside the equipment and affecting long-term performance.

[0004] Therefore, there is a need in the art for an intelligent ultrasonic cleaning machine that can monitor water quality parameters in real time, automatically adjust the cleaning process, improve cleaning efficiency and quality, and save water and energy. The present application solves the above problems through modular design, multi-sensor detection and intelligent control algorithm, and realizes the optimization and automation of the cleaning process. SUMMARY

[0005] In view of the technical defects in the background art, the present application proposes an ultrasonic intelligent cleaning device and a control method thereof, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0006] An ultrasonic intelligent cleaning device, comprising:

[0007] A rack and structure module, comprising a frame unit composed of metal profiles welded together and a water tank unit fixed inside by bolts;

[0008] A water and air supply and temperature control module, comprising a water inlet unit, a compressed air unit and a heater installed inside the water tank;

[0009] A circulation and filtration module, comprising a water circulation unit and a detection unit integrated on the pipeline thereof;

[0010] A cleaning and execution module, comprising a flushing unit and an ultrasonic oscillator;

[0011] a drainage module comprising a drainage unit with a drainage pipe and a valve;

[0012] a control and interaction module comprising a controller and a touch screen human-machine interface connected thereto through a cable;

[0013] The water tank unit is fixed inside the frame unit by welding or bolts, and its interior is separated by a partition into a heating chamber in which the heater is arranged and a washing chamber for accommodating the articles to be cleaned. The top end of the inner wall of the heating chamber and the washing chamber is provided with a liquid level sensor installed by screwing.

[0014] The washing unit comprises a front coil pipe arranged in a coil and a multi-stage water pump. The inlet end of the multi-stage water pump is connected to the bottom of the heating chamber through a pipe to form a second water inlet of the washing unit. The output end of the multi-stage water pump is connected to the front coil pipe. The second water inlet is connected with a filter screen which is fixed to the inner wall of the heating chamber by buckling. The output end of the washing unit extends to the washing chamber and is connected to the washing chamber through a nozzle. The ultrasonic oscillator is fixed to the inner surface of the side wall of the heating chamber by bolts.

[0015] The controller is connected to the electrical elements of each module through a cable for receiving detection signals from the detection unit and controlling the start and stop and coordinated operation of each module through a relay.

[0016] As a further technical solution of the present application, the water inlet unit comprises two or three secondary filter tanks connected in series. The water inlet of the water inlet unit is located at the top of the frame unit and is connected to an external water source through a quick connector. The water outlet end is connected to the upper part of the heating chamber through a pipe.

[0017] The inlet end of the drainage unit is connected to the bottom of the washing chamber and the heating chamber through a three-way valve for controlling the discharge of wastewater through an electric valve.

[0018] The air outlet end of the compressed air unit is connected to the front coil pipe of the washing unit through a high-pressure hose for providing high-pressure gas to generate a high-pressure washing water flow.

[0019] As a further technical solution of the present application, the detection unit comprises a conductivity probe for detecting the conductivity of water, a turbidity probe for detecting the turbidity of water, a particle size probe for detecting the size and number of particles in water, and several sampling ports for offline detection. The conductivity probe and the turbidity probe are respectively provided with two electrical input ends. One input end is connected to the main pipeline of the water circulation unit through a three-way connector, and the other input end is connected through an extension line and extends below the internal liquid level of the washing chamber. The sampling ports are connected to the branch of the water circulation unit through branch pipelines, and each sampling port is provided with a manual valve.

[0020] As a further technical solution of the present application, the water circulation unit comprises a centrifugal water pump, a filter screen and a primary filter tank, the inlet end of the centrifugal water pump is connected with the bottom of the flushing chamber through a pipeline to form a first water inlet of the water circulation unit, the first water inlet is connected with the filter screen and the filter screen is fixed on the inner wall of the flushing chamber through buckling, the outlet end of the centrifugal water pump is connected with the inlet end of the primary filter tank through a pipeline, and the output end of the water circulation unit is connected with the upper part of the heating chamber through a pipeline.

[0021] As a further technical solution of the present application, the heating chamber and the flushing chamber of the water tank unit are separated by an overflow plate, so that when the liquid level of the heating chamber is higher than the set height, the liquid can enter the flushing chamber through overflow.

[0022] As a further technical solution of the present application, the bottom of the flushing chamber is provided with a rotating disc driven by a motor, the upper end surface of the rotating disc is fixed with a rubber non-slip pad by adhesive, and the surface of the non-slip pad is provided with non-slip lines.

[0023] A control method based on the above-mentioned ultrasonic intelligent cleaning equipment, executed by the controller, the controller can select two cleaning modes of ultrasonic cleaning and mixed cleaning through a human-machine interface, the ultrasonic cleaning mode comprises the following steps:

[0024] S1: Start the equipment to select the ultrasonic cleaning mode, input the preset temperature T_set, conductivity threshold K_set, turbidity threshold Z_set and Z_set, granularity threshold P_set and P_set, ultrasonic cleaning time t and maximum allowed cycle number N_max through the human-machine interface;

[0025] S2: Control the electric valve of the water inlet unit to open, and inject clean water to reach the set position of the liquid level sensor into the heating chamber;

[0026] S3: Start the heater to heat the water in the heating chamber to the preset temperature T_set, and then enter the temperature maintenance stage, dynamically adjust the power of the heater through the PID control algorithm to stabilize the water temperature in the range of T_set±ΔT;

[0027] S4: Start the centrifugal water pump of the water circulation unit, inject the water filtered through the flushing unit into the flushing chamber until the set water level of the liquid level sensor is reached, then close the water circulation unit and stop water injection, and then start the ultrasonic oscillator to clean the articles in the cabin for a time t;

[0028] S5: The water quality parameters in the rinsing chamber are collected in real time by the detection unit. The water quality parameters include turbidity value Z and particle size value P, and are compared with the preset turbidity threshold Z_set and particle size threshold P_set, respectively. If Z≥Z_set or P≥P_set, the ultrasonic oscillator is immediately turned off and the process returns to S; otherwise, S is executed after the cleaning time reaches t.

[0029] S6: Turn off the ultrasonic oscillator, start the water circulation unit to circulate and filter the water in the flushing chamber, and collect water quality parameter data of the circulating water through the detection unit. The water quality parameters include conductivity value K, turbidity value Z and particle size value P.

[0030] S7: Real-time monitoring of the number of cyclic flushing cycles N; if N≥N_max, immediately stop flushing, issue an audible and visual alarm, control the drainage unit to open the valve to drain water, and return to S to re-execute the cleaning task after confirmation through the human-machine interface; otherwise, execute S.

[0031] S9: Compare the collected conductivity value K, turbidity value Z, and particle size value P with the preset conductivity threshold K_set, turbidity threshold Z_set, and particle size threshold P_set, respectively; if K≤K_set, Z≤Z_set, and P≤P_set, then the cleaning is considered complete and proceed to step S; otherwise, return to step S.

[0032] S9: Control the drainage unit to open the valve to discharge the used cleaning fluid. The human-machine interface will issue an audible prompt and display the text "Cleaning complete". The human-machine interface will display and save a summary report of this cleaning, which includes the final water quality data and the number of cycles.

[0033] As a further technical solution of the present invention, the mixed cleaning mode includes the following steps:

[0034] S1: Start the equipment and select the mixed cleaning mode. Input the preset temperature T_set, conductivity threshold K_set, turbidity threshold Z_set and Z_set, particle size threshold P_set and P_set, ultrasonic cleaning time t, high pressure rinsing time t, and maximum allowable number of cycles N_max through the human-machine interface.

[0035] S2: Control the opening of the electric valve of the water inlet unit to inject clean water into the heating chamber to the level set by the liquid level sensor;

[0036] S3: Start the heater to heat the water in the heating chamber to the preset temperature T_set, and then enter the temperature maintenance stage. The power of the heater is dynamically adjusted through the PID control algorithm to keep the water temperature stable within the range of T_set±ΔT.

[0037] S4: Start the centrifugal water pump of the water circulation unit, inject the water after heating and filtering into the washing chamber through the washing unit until the water level sensor reaches the set water level, then close the water circulation unit and stop water injection, and then start the ultrasonic oscillator to clean the items in the chamber for a time t;

[0038] S5: Collect the water quality parameters in the washing chamber in real time through the detection unit, including turbidity value Z and granularity value P, and compare them with the preset turbidity threshold Z_set and granularity threshold P_set respectively; if Z≥Z_set or P≥P_set, execute S; otherwise, after the cleaning time reaches t, execute S;

[0039] S6: Immediately close the ultrasonic oscillator, and start the water circulation unit to circulate and filter the water in the washing chamber;

[0040] S7: Start the air compressor of the compressed air unit and the driving motor of the rotating disc, mix the water after heating and filtering with compressed air in the front coil of the washing unit, generate a high-pressure washing water flow, and perform omnidirectional washing of the items in the washing chamber for a time t, and return to S;

[0041] 8S: Start the water circulation unit to circulate and filter the water in the washing chamber;

[0042] S9: Start the air compressor of the compressed air unit and the driving motor of the rotating disc, mix the water after heating and filtering with compressed air in the front coil of the washing unit, generate a high-pressure washing water flow, and perform omnidirectional washing of the items in the washing chamber for a time t;

[0043] 10S: During the cleaning process, collect the water quality parameter data of the circulating water through the detection unit, including conductivity value K, turbidity value Z, and granularity value P;

[0044] S11: Real-time monitor the number of circulating washes N; if N≥N_max, immediately stop washing, issue an audible and visual alarm, open the valve of the drainage unit to drain water, and return to S to perform the cleaning task again after confirmation through the human-machine interface; otherwise, execute S;

[0045] S12: Compare the collected conductivity value K, turbidity value Z, and granularity value P with the preset conductivity threshold K_set, turbidity threshold Z_set, and granularity threshold P_set respectively; if K≤K_set, Z≤Z_set, and P≤P_set, determine that the cleaning is complete, and execute S; otherwise, return to step S;

[0046] S13: Control the drain unit to open the valve to discharge the used cleaning liquid, issue a sound prompt and display the "cleaning completed" text through the human-machine interface, display and save the summary report of this cleaning through the human-machine interface, and the report includes the final water quality data and the number of cycles.

[0047] As a further technical solution of the application, the controller can also select a self-cleaning mode through the human-machine interface, and the self-cleaning mode includes the following steps:

[0048] S1: Start the device and select the self-cleaning mode, input the preset temperature T_set, conductivity threshold K_set, turbidity threshold Z_set and granularity threshold P_set through the human-machine interface;

[0049] S2: Control the electric valve of the water inlet unit to open, and inject clean water to reach the set position of the liquid level sensor into the heating chamber;

[0050] S3: Start the heater to heat the water in the heating chamber to the preset temperature T_set, and then enter the temperature maintenance stage, dynamically adjust the power of the heater through the PID control algorithm to stabilize the water temperature within the range of T_set ± ΔT;

[0051] S4: Start the centrifugal water pump of the water circulation unit and the air compressor of the compressed air unit, mix the filtered water and compressed air in the pre-coil of the flushing unit to generate a high-pressure flushing water flow, flush the inner wall of the flushing chamber and the rotating disc, and perform water quality monitoring during the cleaning process;

[0052] S5: Real-time acquisition of water quality parameter data of the circulating water through the detection unit, including conductivity value K, turbidity value Z and granularity value P;

[0053] S6: Compare the real-time acquired conductivity value K, turbidity value Z and granularity value P with the preset conductivity threshold K_set, turbidity threshold Z_set and granularity threshold P_set respectively; if K≤K_set, Z≤Z_set and P≤P_set, determine that the self-cleaning is completed, and execute S; otherwise, return to step S;

[0054] S7: Control the drain unit to open the valve to discharge the used cleaning liquid, issue a sound prompt and display the "self-cleaning completed" text through the human-machine interface.

[0055] The application has the beneficial effects that: through the controller, the water quality parameters are monitored in real time and compared with the preset threshold value, the cleaning process is automatically adjusted, the cleaning effect is stable and reliable, over-cleaning or insufficient cleaning is avoided, the cleaning precision and consistency are improved; efficient cleaning and multi-mode selection: a mixed cleaning mode combining ultrasonic cleaning and high-pressure flushing is adopted, an ultrasonic oscillator is used for refining stubborn dirt, high-pressure flushing water flow is used for flushing large-particle pollutants, combined with a rotating disc design, omnidirectional cleaning of the articles is realized, and the cleaning efficiency and coverage are greatly improved; energy saving and water saving and recycling: through a water circulation unit and a filtration system, the cleaning water is recycled and filtered and reused, the clean water consumption and wastewater discharge are reduced; the heater adopts a PID control algorithm, the water temperature is accurately maintained, the energy consumption is reduced, and the green environmental protection requirement is met; multifunctionality and self-cleaning capability: multi-ultrasonic cleaning, mixed cleaning and self-cleaning modes are supported, and the cleaning needs of different articles are met; the self-cleaning mode can automatically clean the inside of the equipment, prevent dirt accumulation, prolong the service life of the equipment and reduce the maintenance cost; the man-machine interface displays water quality data, equipment status and cleaning report in real time, the user can easily set the working parameters, and the operation is intuitive and convenient; an abstract report is generated after cleaning, and recording and analysis are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 is a schematic view of an embodiment of the application;

[0057] Figure 2 is a schematic view of an embodiment of the application after the hidden frame unit is hidden;

[0058] Figure 3 is a rear view of an embodiment of the application after the hidden frame unit is hidden;

[0059] Figure 4 is a top view of an embodiment of the application;

[0060] Figure 5 is an A-A sectional view of an embodiment of the application;

[0061] Figure 6 is a program block diagram of an ultrasonic cleaning mode of an embodiment of the application;

[0062] Figure 7 is a program block diagram of a mixed cleaning mode of an embodiment of the application;

[0063] Figure 8 is a program block diagram of a self-cleaning mode of an embodiment of the application.

[0064] Wherein: 1-frame unit; 2-water tank unit, 21-heating chamber, 22-flushing chamber, 23-overflow plate, 24-ultrasonic oscillator, 25-rotary disc, 26-non-slip mat, 27-liquid level sensor; 3-water inlet unit, 31-secondary filter tank; 4-flushing unit, 41-preposed coil, 42-multistage water pump, 43-second water inlet; 5-drainage unit; 6-compressed air unit; 7-heater; 8-water circulation unit, 81-centrifugal water pump, 82-filter screen, 83-primary filter tank, 84-first water inlet; 9-detection unit, 91-electrical conductivity probe, 92-turbidity probe, 93-particle size probe, 94-sampling port; 10-controller, 101-human-machine interface. DETAILED DESCRIPTION

[0065] This embodiment illustrates an ultrasonic intelligent cleaning equipment, which is composed of the following modules:

[0066] The frame and structure module contains frame unit 1 and water tank unit 2 fixed inside it;

[0067] The water and air supply and temperature control module contains water inlet unit 3, compressed air unit 6 and heater 7;

[0068] The circulation and filtration module contains water circulation unit 8 and detection unit 9 integrated on its pipeline;

[0069] The cleaning and execution module contains flushing unit 4 and ultrasonic oscillator 24;

[0070] The drainage module contains drainage unit 5;

[0071] The control and interaction module contains controller 10 and human-machine interface 101 connected with it;

[0072] The frame unit 1 is the support structure of the whole machine, which is composed of profiles fixedly connected by welding, and the outside is covered with a metal plate, preferably stainless steel plate. The water tank unit 2 is fixed below the inside of the frame unit 1, and the inside of the water tank unit 2 is divided into two compartments, heating chamber 21 and flushing chamber 22, by an overflow plate 23. The height of the overflow plate 23 is lower than the height of the side of the water tank unit 2, so that when the water level of the heating chamber 21 exceeds the overflow plate 23, it can flow into the flushing chamber 22, not only can adjust the water level of the heating chamber 21 and the flushing chamber 22 stable, but also can prevent the heating chamber 21 from dry burning. The overflow plate 23 is preferably made of stainless steel. The heating chamber 21 is fixedly installed with a heater 7 on one side. In this embodiment, the heater 7 preferably uses an electric heating tube that can be immersed. The heater 7 can adjust its output power according to temperature changes. The flushing chamber 22 is used to carry baskets, tooling or directly place the workpieces to be cleaned. The bottom of the flushing chamber 22 is provided with a rotating disc 25 for placing the cleaning objects and driving them to rotate so that they can be cleaned more evenly. Supports or clamps can be provided in the cabin. The top of the inside of the heating chamber 21 and the flushing chamber 22 is provided with a liquid level sensor 27, which is electrically connected with the controller 10, can detect the liquid level and send the detection results to the controller 10.

[0073] The flushing unit 4 is fixed to the back of the water tank unit 2. The second water inlet 43 of the flushing unit 4 is communicated with the heating chamber 21 through the filter screen 82 fixed to the bottom of the inner wall of the heating chamber 21, so that the flushing unit 4 can extract clean hot water filtered and heated from the heating chamber 21 for flushing. The second water inlet 43 is connected with the input end of the multi-stage water pump 42, and the output end of the multi-stage water pump 42 is connected with the front disc pipe 41. The output end of the flushing unit 4 is connected with the flushing chamber 22 through a pipeline and extends into the inside of the flushing chamber 22. The end of the output end is provided with a nozzle. The output end of the compressed air unit 6 is connected with the flushing unit 4 through a pipeline. Hot water and compressed air are mixed in the flushing unit 4 and sprayed out of the output end of the flushing unit 4 to form a high-temperature and high-pressure water flow for flushing. The ultrasonic oscillator 24 is fixed to the inner wall of one side of the heating chamber 21, which can emit ultrasonic waves to clean the objects in the flushing chamber 22.

[0074] The controller 10 is the control center of the whole device, usually adopting PLC or high-performance single-chip controller. It is electrically connected with the heater 7, the electromagnetic valve of the water inlet unit 3, the water pump of the water circulation unit 8, the start-stop of the compressed air unit 6, the related valve of the flushing unit 4, the drainage pump of the drainage unit 5 and the sensors of the detection unit 9. The controller 10 receives the detection signals from the sensors and coordinates the orderly work of the execution components according to the preset program logic. In addition, the controller 10 is also connected with a human-computer interface 101, which can adopt a touch screen for real-time display of water temperature, water pressure, real-time conductivity value, real-time turbidity value, device running state, fault alarm code and other information, and allows the user to set and modify cleaning temperature T, cleaning time, water quality threshold (K_set, Z_set, P_set), maximum cycle number Nmax and other parameters.

[0075] The top of the frame unit 1 is provided with a water inlet unit 3, and the water inlet of the water inlet unit 3 is located at the top or back of the frame unit 1. The water inlet of the water inlet unit 3 is connected with a factory pure water system, and the water outlet pipeline extends to the upper part inside the heating chamber 21 for injecting clean pure water into the heating chamber 21. The water inlet unit 3 adopts an electromagnetic valve for on-off control, and a plurality of secondary filter tanks 31 are connected in series on the water inlet pipeline for pretreatment of the supplemented clean water to remove possible large particle impurities and protect the subsequent precision components.

[0076] The inlet end of the drainage unit 5 is connected with the bottom of the flushing chamber 22 and the heating chamber 21 through a three-way valve or two branches respectively, and the outlet end is connected to a wastewater discharge pipe. The drainage unit 5 usually adopts a drainage pump controlled by the controller 10 for completely discharging the wastewater in the cabin when the cleaning is finished or when the water needs to be changed.

[0077] The outlet end of the compressed air unit 6 is connected to the mixing unit of the flushing unit 4 through a pipeline to mix high-pressure gas with hot water, thereby generating a gas-liquid two-phase high-pressure flushing water flow with stronger impact force and better cleaning effect.

[0078] The detection unit 9 is distributed beside the main pipeline or branch of the water circulation unit 8 for real-time detection of the water quality of the circulating water, which includes at least one of an electric conductivity probe 91 for detecting the concentration of dissolved ions in water, a turbidity probe 92 for detecting the turbidity of water body and a granularity probe 93 for monitoring the number and size of particles contained in water body. In order to more intuitively and accurately detect the water quality, a plurality of sampling ports 94 are also installed, which are connected with the branch of the water circulation unit 8 through a pipeline. The sampling ports 94 are controlled by the controller 10 to sample the circulating water for direct observation or offline detection to more intuitively see the water quality state or obtain more accurate water quality data. The water quality data obtained by offline detection is compared and calibrated with the data detected by the device in real time to improve the accuracy of the device detection.

[0079] The water circulation unit 8 is the core component that enables the recycling of water resources. The first water inlet 84 of the water circulation unit 8 is in communication with the bottom of the flushing chamber 22 through a filter screen 82 fixed to the inner wall of the flushing chamber 22, and can extract the cleaning water after flushing. The first water inlet 84 is in bolted connection with the input end of the centrifugal water pump 81, and the input end of the centrifugal water pump 81 is connected with at least one primary filter tank 83 to perform multi-level filtration on the cleaning water after cleaning, and then the filtered water is delivered to the heating chamber 21 through a pipeline to complete the recycling of water resources.

[0080] The embodiment details the specific implementation process of the control method of the ultrasonic intelligent cleaning equipment. The control method is executed by the controller 10, which uses PLC to control each component to perform work content. Users can select work modes through the human-machine interface 101, including ultrasonic cleaning mode and mixed cleaning mode. Users can select appropriate work modes according to the situation. If the to-be-cleaned articles are easy to damage, the ultrasonic cleaning mode is adopted. If the to-be-cleaned articles have large stubborn stains, the mixed cleaning mode is adopted. Before cleaning, the self-cleaning mode can be selected as needed to clean the device to ensure that the residues from the last cleaning do not affect the current cleaning.

[0081] The flow of the ultrasonic cleaning mode is as follows:

[0082] After the user places the to-be-cleaned articles on the rotating disc 25 of the flushing chamber 22, the hatch is closed.

[0083] S1: Start the equipment and select the ultrasonic cleaning mode. Input the preset temperature T_set=60℃, the conductivity threshold K_set=40 μS / cm, the turbidity thresholds Z_set1=20 NTU and Z_set2=5 NTU, the particle size thresholds P_set1 (≥5 μm)=10000 counts / mL and P_set2 (≥5 μm)=1000 counts / mL, the ultrasonic cleaning time t=5 min, and the maximum allowed number of cycles C_max=10;

[0084] S2: The controller 10 controls the opening of the electromagnetic valve of the water inlet unit 3, and controls the water inlet unit 3 to inject a set amount of clean water into the heating chamber 21 by receiving the liquid level information from the liquid level sensor 27;

[0085] S3: After the water injection is completed, the controller 10 controls the closing of the water inlet unit 3 and starts the heater 7 to heat the water in the heating chamber 21 to 60℃, and then enters the temperature maintenance stage. The output power of the heater 7 is dynamically adjusted through the PID control algorithm to control the water temperature in the heating chamber 21 within the range of (60±5)℃.

[0086] S4: After the water temperature is heated to the predetermined range, the controller 10 controls the opening of the water circulation unit 8, and the water after heating and filtering is injected into the washing chamber 22 through the washing unit 4. The liquid level information transmitted by the liquid level sensor 27 arranged in the washing chamber 22 is used to control the water circulation unit 8 to be closed after the water in the washing chamber 22 reaches the preset value. Then the ultrasonic oscillator 24 inside the washing chamber 22 is turned on to perform ultrasonic cleaning on the objects to be cleaned, and the cleaning time is 5 minutes;

[0087] S5: During the ultrasonic cleaning process, the controller 10 controls the turbidity probe 92 and the particle size probe 93 to detect the cleaning liquid in the washing chamber 22, and transmits the detected turbidity value Z1 and particle size value P1 to the controller 10. After receiving the water quality value, the real-time water quality value is compared with the preset turbidity threshold Z_set1 = 20 NTU and the particle size threshold P_set1 = 10000 counts / mL respectively:

[0088] If the obtained real-time water quality data is greater than or equal to the set threshold (i.e. Z1≥20 NTU or P1≥10000 counts / mL), the ultrasonic oscillator 24 is immediately turned off, and the step S4 is returned to execute;

[0089] If the obtained real-time water quality data is always lower than the set threshold (i.e. Z1≤20 NTU or P1≤10000 counts / mL), after 5 minutes of cleaning, S6 is executed;

[0090] S6: The controller 10 controls the ultrasonic oscillator 24 to be turned off and starts the water circulation unit 8 to extract and circulate the water in the washing chamber 22 for filtering, and detects the water quality of the circulating water through the control detection unit 9 and transmits the detected conductivity value K, turbidity value Z2 and particle size value P2 to the controller 10;

[0091] S7: The number of circulating washing times N is monitored in real time. If the number of circulating washing times reaches the preset value N_max (i.e. N≥10), the washing is immediately stopped, an alarm is issued, and the water in the washing chamber 22 is drained by the drainage unit 5. After confirmation by the man-machine interface 101, the cleaning task is returned to step S2 for re-execution. Otherwise, S8 is executed;

[0092] S8: The controller 10 compares the collected conductivity value K, turbidity value Z2 and particle size value P2 with the preset conductivity threshold K_set, turbidity threshold Z_set2 and particle size threshold P_set2 respectively;

[0093] If the water quality detection values are all below the preset threshold (i.e. K≤40 μS / cm and Z 2≤5 NTU and P 2≤1000 counts / mL), it is determined that the cleaning is completed, and step S10 is executed;

[0094] If one of the water quality detection values is above the preset threshold (i.e. K≥40 μS / cm or Z 2≥5 NTU or P 2≥1000 counts / mL), it is determined that the cleaning is not completed, and step S4 is returned to;

[0095] S9: The controller 10 controls the drainage unit 5 to discharge the used cleaning liquid, controls the man-machine interface 101 to issue a prompt and display "cleaning completed", controls the man-machine interface 101 to display and save a summary report of the current cleaning, and the report includes final water quality data and the number of cycles.

[0096] For small or easily damaged items, the ultrasonic cleaning mode is adopted, which can better protect the items from being damaged during cleaning and effectively ensure the cleaning effect of the items.

[0097] The mixed cleaning mode includes the following steps:

[0098] S1: Start the device to select the mixed cleaning mode, input the preset temperature T set = 60°C, the conductivity threshold K set = 40 μS / cm, the turbidity thresholds Z set1 = 20 NTU and Z set2 = 5 NTU, the particle size thresholds P set1 (≥5 μm) = 10000 counts / mL and P set2 (≥5 μm) = 1000 counts / mL, the ultrasonic cleaning time t1 = 5 min, the high-pressure flushing time t2 = 5 min, and the maximum allowed number of cycles C max = 5;

[0099] S2: The controller 10 controls the electromagnetic valve of the water inlet unit 3 to be opened, receives the liquid level information from the liquid level sensor 27, and controls the water inlet unit 3 to inject a set amount of clean water into the heating chamber 21;

[0100] S3: After the water injection is completed, the controller 10 controls the water inlet unit 3 to be closed and starts the heater 7 to heat the water in the heating chamber 21 to 60°C, and then enters the temperature maintenance stage, dynamically adjusts the output power of the heater 7 through the PID control algorithm, and controls the water temperature in the heating chamber 21 to be within the range of (60±5) °C;

[0101] S4: After the water temperature is heated to the predetermined range, the controller 10 controls to open the water circulation unit 8, and injects the water after heating and filtering into the washing chamber 22 through the washing unit 4. The liquid level information transmitted by the liquid level sensor 27 arranged in the washing chamber 22 is used to control the water circulation unit 8 to be closed after the water amount in the washing chamber 22 reaches the preset value. Then the ultrasonic oscillator 24 inside the washing chamber 22 is opened to perform ultrasonic cleaning on the objects to be cleaned, and the cleaning time is 5 minutes;

[0102] S5: During the ultrasonic cleaning process, the controller 10 controls the turbidity probe 92 and the granularity probe 93 to detect the cleaning liquid in the washing chamber 22, and transmits the detected turbidity value Z1 and granularity value P1 to the controller 10. After receiving the water quality values, the real-time water quality values are compared with the preset turbidity threshold Z_set1 = 20 NTU and the granularity threshold P_set1 = 10000 counts / mL respectively:

[0103] If the obtained real-time water quality data is greater than or equal to the set threshold (i.e. Z1 ≥ 20 NTU or P1 ≥ 10000 counts / mL), step S6 is performed;

[0104] If the obtained real-time water quality data is always lower than the set threshold (i.e. Z1 ≤ 20 NTU or P1 ≤ 10000 counts / mL), after 5 minutes of cleaning, step S8 is performed;

[0105] S6: The controller 10 immediately controls to close the ultrasonic oscillator 24, and starts the water circulation unit 8 to draw out the cleaning water in the washing chamber 22 and perform circulating filtration;

[0106] S7: The controller 10 controls the compressed air unit 6 to deliver compressed air to the washing unit 4, mixes the water after heating and filtering with the compressed air in the washing unit 4 to generate a high-pressure washing water flow, controls the rotating disc 25 to start rotating, and then opens the washing unit 4 to perform omnidirectional washing on the objects in the washing chamber 22 for 5 minutes, and returns to step S4;

[0107] S8: After the ultrasonic cleaning is completed, the controller 10 controls to close the ultrasonic oscillator 24, and starts the water circulation unit 8 to draw out the cleaning water in the washing chamber 22 and perform circulating filtration;

[0108] S9: The controller 10 controls the compressed air unit 6 to deliver compressed air to the washing unit 4, mixes the water after heating and filtering with the compressed air in the washing unit 4 to generate a high-pressure washing water flow, controls the rotating disc 25 to start rotating, and then opens the washing unit 4 to perform omnidirectional washing on the objects in the washing chamber 22 for 5 minutes;

[0109] S10: In the cleaning process, the controller 10 controls the detection unit 9 to collect the water quality of the circulating water for detection and transmits the detected conductivity value K, turbidity value Z2 and granularity value P2 to the controller 10;

[0110] S11: Real-time monitoring of the number of circulating flushing N, if the number of circulating flushing reaches the preset value N_max (i.e. N≥10), then immediately stop flushing, issue an alarm, control the drainage unit 5 to drain the water in the flushing chamber 22, after confirmation through the human-machine interface 101, return to step S2 to re-execute the cleaning task; otherwise, execute S12;

[0111] S12: The controller 10 compares the collected conductivity value K, turbidity value Z2 and granularity value P2 with the preset conductivity threshold K_set, turbidity threshold Z_set2 and granularity threshold P_set2 respectively;

[0112] If the water quality detection values are all lower than the preset threshold (i.e. K≤40 μS / cm and Z2≤5 NTU and P2≤1000 counts / mL), it is determined that the cleaning is completed, and step S13 is executed;

[0113] If one of the water quality detection values is higher than the preset threshold (i.e. K≥40 μS / cm or Z2≥5 NTU or P2≥1000 counts / mL), it is determined that the cleaning is not completed, and step S4 is returned to;

[0114] S13: The controller 10 controls the drainage unit 5 to drain the used cleaning liquid, controls the human-machine interface 101 to issue a prompt and display "cleaning completed", controls the human-machine interface 101 to display and save the summary report of this cleaning, which includes the final water quality data and the number of cycles.

[0115] For the articles with large stubborn stains attached, it is difficult to clean the large stains in a short time by ultrasonic cleaning alone, therefore, ultrasonic cleaning and high-pressure water flow cleaning are alternately performed, which not only can clean the large stains attached to the articles, but also can clean the stains in the gaps of the articles, saving energy and improving cleaning effect.

[0116] The self-cleaning mode includes the following steps:

[0117] S1: Start the equipment and select the self-cleaning mode on the human-machine interface 101, then input the preset temperature T_set=40℃, conductivity threshold K_set=20 μS / cm, turbidity threshold Z_set=1 NTU and granularity threshold P_set (≥5 μm)=100 counts / mL;

[0118] S2: The controller 10 controls the opening of the water inlet unit 3, and injects a set amount of clean water into the heating chamber 21 through the liquid level data transmitted by the liquid level sensor 27, and controls

[0119] S3: Start the heater 7, heat the water in the heating chamber 21 to 40℃, and then enter the temperature maintenance stage, dynamically adjust the output power of the heater 7 through the PID control algorithm, so that the water temperature is stabilized in the range of (40±3)℃;

[0120] S4: The controller 10 controls the start of the water circulation unit 8 and the compressed air unit 6, mixes the filtered water and compressed air in the flushing unit 4 to generate a high-pressure flushing water flow, and flushes the flushing chamber 22, and performs water quality monitoring during the cleaning process. Cycle;

[0121] S5: The controller 10 collects water quality parameter data of the circulating water in real time through the detection unit 9, and the water quality parameters include conductivity value K, turbidity value Z and particle size value P;

[0122] S6: Compare the real-time collected conductivity value K, turbidity value Z and particle size value P with the preset conductivity threshold K_set, turbidity threshold Z_set and particle size threshold P_set respectively;

[0123] If the water quality detection value is lower than the preset threshold (i.e. K≤20μS / cm and Z 2≤1 NTU and P2≤100counts / mL), it is determined that the cleaning is completed, and step S7 is executed;

[0124] If one of the water quality detection values is higher than the preset threshold (i.e. K≥20μS / cm or Z 2≥1 NTU or P2≥100counts / mL), it is determined that the cleaning is not completed, and returns to step S4;

[0125] S7: The drain unit 5 discharges the used cleaning liquid, and the human-machine interface 101 sends a prompt and displays "self-cleaning completed".

[0126] The self-cleaning mode can clean the heating chamber 21, the flushing chamber 22 and the pipeline inside the device before cleaning, effectively remove impurities left by the last cleaning object, and avoid affecting the current object to be cleaned.

[0127] The above only describes the preferred embodiments of the present application. It should be noted that those skilled in the art can make some improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An ultrasonic intelligent cleaning device, characterized in that: include: The frame and structural modules include a frame unit (1) made of welded metal profiles and a water tank unit (2) fixed inside it by bolts. The water and air supply and temperature control module includes a water inlet unit (3), a compressed air unit (6), and a heater (7) installed inside the water tank. The circulation and filtration module includes a water circulation unit (8) and a detection unit (9) integrated into its pipeline; The cleaning and execution module includes a rinsing unit (4) and an ultrasonic oscillator (24). Drainage module, including drainage unit (5) with drainage pipe and valve; The control and interaction module includes a controller (10) and a touch screen human-machine interface (101) connected thereto via a cable. The water tank unit (2) is fixed to the lower part of the frame unit (1) by welding or bolting. Its interior is divided into a heating chamber (21) with the built-in heater (7) and a rinsing chamber (22) for accommodating items to be cleaned by a partition. The top of the inner wall of the heating chamber (21) and the rinsing chamber (22) are provided with liquid level sensors (27) installed by threads. The rinsing unit (4) includes a coiled front coil (41) and a multi-stage water pump (42). The inlet end of the multi-stage water pump (42) is connected to the bottom of the heating chamber (21) through a pipe to form the second water inlet (43) of the rinsing unit (4). The output end of the multi-stage water pump (42) is connected to the front coil (41). The second water inlet (43) is connected to a filter screen, and the filter screen is fixed to the inner wall of the heating chamber (21) by a snap fastener. The output end of the rinsing unit (4) extends to the rinsing chamber (22) and is connected to the rinsing chamber (22) through a nozzle. The ultrasonic oscillator (24) is fixed to the inner surface of the side wall of the heating chamber (21) by bolts. The controller (10) is connected to the electrical components of each module via a cable, and is used to receive detection signals from the detection unit (9) and control the start-up, shutdown and coordinated operation of each module via relays; The outlet of the compressed air unit (6) is connected to the front coil (41) of the flushing unit (4) via a high-pressure hose to provide high-pressure gas to generate a high-pressure flushing water flow. The water circulation unit (8) includes a centrifugal water pump (81), a filter screen (82) and a primary filter tank (83). The inlet end of the centrifugal water pump (81) is connected to the bottom of the flushing chamber (22) through a pipe to form the first water inlet (84) of the water circulation unit (8). The first water inlet (84) is connected to the filter screen (82) and the filter screen (82) is fixed to the inner wall of the flushing chamber (22) by a snap fastener. The outlet end of the centrifugal water pump (81) is connected to the inlet end of the primary filter tank (83) through a pipe. The output end of the water circulation unit (8) is connected to the upper part of the heating chamber (21) through a pipe. The heating chamber (21) and the flushing chamber (22) of the water tank unit (2) are separated by an overflow plate (23) so that when the liquid level in the heating chamber (21) is higher than the set height, it can enter the flushing chamber (22) by overflow.

2. The ultrasonic intelligent cleaning equipment according to claim 1, characterized in that: The water inlet unit (3) includes two or three secondary filter tanks (31) connected in series. The water inlet of the water inlet unit (3) is located at the top of the frame unit (1) and connected to an external water source through a quick connector. Its water outlet is connected to the upper part of the heating chamber (21) through a pipe. The inlet of the drainage unit (5) is connected to the bottom of the flushing chamber (22) and the heating chamber (21) respectively via a three-way valve, and is used to control the discharge of wastewater by means of an electric valve.

3. The ultrasonic intelligent cleaning equipment according to claim 1, characterized in that: The detection unit (9) includes a conductivity probe (91) for detecting water conductivity, a turbidity probe (92) for detecting water turbidity, a particle size probe (93) for detecting the size and number of particles in the water, and several sampling ports (94) for offline detection. The conductivity probe (91) and the turbidity probe (92) are each provided with two electrical input terminals. One input terminal is connected to the main pipeline of the water circulation unit (8) through a three-way connector, and the other input terminal is connected through an extension line and extends into the interior of the flushing chamber (22) below the liquid level. The sampling ports (94) are connected to the branch pipeline of the water circulation unit (8) through a branch pipeline, and each sampling port (94) is equipped with a manual valve.

4. The ultrasonic intelligent cleaning equipment according to claim 1, characterized in that: The bottom of the rinsing chamber (22) is provided with a rotating disk (25) driven by a motor. A rubber anti-slip pad (26) is fixed to the upper surface of the rotating disk (25) by an adhesive. The surface of the anti-slip pad (26) is provided with anti-slip texture.

5. A control method for the ultrasonic intelligent cleaning equipment according to claim 4, characterized in that: The process is executed by the controller (10), which can select two cleaning modes, ultrasonic cleaning and mixed cleaning, through a human-machine interface (101). The ultrasonic cleaning mode includes the following steps: S1: Start the equipment and select the ultrasonic cleaning mode. Input the preset temperature T_set, conductivity threshold K_set, turbidity thresholds Z_set1 and Z_set2, particle size thresholds P_set1 and P_set2, ultrasonic cleaning duration t, and maximum allowable number of cycles N_max through the human-machine interface (101). S2: Control the opening of the electric valve of the water inlet unit (3) to inject clean water into the heating chamber (21) to the level set by the liquid level sensor (27); S3: Start the heater (7) to heat the water in the heating chamber (21) to the preset temperature T_set, and then enter the temperature maintenance stage. The power of the heater (7) is dynamically adjusted by the PID control algorithm to keep the water temperature stable within the range of T_set±ΔT. S4: Start the centrifugal water pump (81) of the water circulation unit (8) and inject the heated and filtered water into the flushing chamber (22) through the flushing unit (4) until the water level is set by the level sensor (27). Then turn off the water circulation unit (8) and stop the water injection. Then turn on the ultrasonic oscillator (24) to clean the items in the chamber for a duration of t. S5: The water quality parameters in the rinsing chamber (22) are collected in real time by the detection unit (9). The water quality parameters include turbidity value Z1 and particle size value P1, and are compared with the preset turbidity threshold Z_set1 and particle size threshold P_set1 respectively. If Z1≥Z_set1 or P1≥P_set1, the ultrasonic oscillator (24) is turned off immediately and S4 is returned. Otherwise, S6 is executed after the cleaning time reaches t. S6: Turn off the ultrasonic oscillator (24), start the water circulation unit (8) to circulate and filter the water in the rinsing chamber (22), and collect the water quality parameter data of the circulating water through the detection unit (9). The water quality parameters include conductivity value K, turbidity value Z2 and particle size value P2. S7: Real-time monitoring of the number of cyclic flushing cycles N; if N≥N_max, immediately stop flushing, issue an audible and visual alarm, control the drainage unit (5) to open the valve to drain water, and return to S2 to re-execute the cleaning task after confirmation by the human-machine interface (101); otherwise, execute S8; S8: Compare the collected conductivity value K, turbidity value Z2, and particle size value P2 with the preset conductivity threshold K_set, turbidity threshold Z_set2, and particle size threshold P_set2, respectively; if K≤K_set, Z2≤Z_set2, and P2≤P_set2, then the cleaning is considered complete, and proceed to S9; otherwise, return to step S4. S9: Control the drainage unit (5) to open the valve to discharge the used cleaning fluid. The human-machine interface (101) will issue an audio prompt and display the text "cleaning completed". The human-machine interface (101) will display and save the summary report of this cleaning, which includes the final water quality data and the number of cycles.

6. The control method as described in claim 5, characterized in that: The hybrid cleaning mode includes the following steps: S1: Start the equipment and select the mixed cleaning mode. Input the preset temperature T_set, conductivity threshold K_set, turbidity threshold Z_set1 and Z_set2, particle size threshold P_set1 and P_set2, ultrasonic cleaning time t1, high pressure rinsing time t2 and maximum allowable number of cycles N_max through the human-machine interface (101). S2: Control the opening of the electric valve of the water inlet unit (3) to inject clean water into the heating chamber (21) to the level set by the liquid level sensor (27); S3: Start the heater (7) to heat the water in the heating chamber (21) to the preset temperature T_set, and then enter the temperature maintenance stage. The power of the heater (7) is dynamically adjusted by the PID control algorithm to keep the water temperature stable within the range of T_set±ΔT. S4: Start the centrifugal water pump (81) of the water circulation unit (8) and inject the heated and filtered water into the flushing chamber (22) through the flushing unit (4) until the water level is set by the level sensor (27). Then turn off the water circulation unit (8) and stop the water injection. Then turn on the ultrasonic oscillator (24) to clean the items in the chamber for a duration of t1. S5: The water quality parameters in the rinsing chamber (22) are collected in real time by the detection unit (9). The water quality parameters include turbidity value Z1 and particle size value P1, and are compared with the preset turbidity threshold Z_set1 and particle size threshold P_set1 respectively. If Z1≥Z_set1 or P1≥P_set1, S6 is executed; otherwise, S8 is executed after the cleaning time reaches t1. S6: Immediately turn off the ultrasonic oscillator (24) and start the water circulation unit (8) to circulate and filter the water in the rinsing chamber (22); S7: Start the air compressor of the compressed air unit (6) and the drive motor of the rotary disk (25), mix the heated and filtered water with the compressed air in the front coil (41) of the rinsing unit (4) to generate a high-pressure rinsing water flow, rinse the items in the rinsing chamber (22) for a duration of t2, and then return to S4; S8: Start the water circulation unit (8) to circulate and filter the water in the flushing chamber (22); S9: Start the air compressor of the compressed air unit (6) and the drive motor of the rotary disk (25) to mix the heated and filtered water with the compressed air in the front coil (41) of the rinsing unit (4) to generate a high-pressure rinsing water flow to rinse the items in the rinsing chamber (22) for a duration of t2. S10: During the cleaning process, the water quality parameters of the circulating water are collected by the detection unit (9). The water quality parameters include conductivity value K, turbidity value Z2 and particle size value P2. S11: Real-time monitoring of the number of cyclic flushing cycles N; if N≥N_max, immediately stop flushing, issue an audible and visual alarm, control the drainage unit (5) to open the valve to drain water, and return to S2 to re-execute the cleaning task after confirmation by the human-machine interface (101); otherwise, execute S12; S12: Compare the collected conductivity value K, turbidity value Z2, and particle size value P2 with the preset conductivity threshold K_set, turbidity threshold Z_set2, and particle size threshold P_set2, respectively; if K≤K_set, Z2≤Z_set2, and P2≤P_set2, then the cleaning is considered complete, and proceed to S13; otherwise, return to step S4. S13: Control the drainage unit (5) to open the valve to discharge the used cleaning fluid. The human-machine interface (101) will issue an audio prompt and display the text "cleaning completed". The human-machine interface (101) will display and save the summary report of this cleaning, which includes the final water quality data and the number of cycles.

7. The control method as described in claim 5 or 6, characterized in that: The controller (10) can also select a self-cleaning mode through a human-machine interface (101), the self-cleaning mode including the following steps: S1: Start the device and select the self-cleaning mode. Input the preset temperature T_set, conductivity threshold K_set, turbidity threshold Z_set and particle size threshold P_set through the human-machine interface (101); S2: Control the opening of the electric valve of the water inlet unit (3) to inject clean water into the heating chamber (21) to the level set by the liquid level sensor (27); S3: Start the heater (7) to heat the water in the heating chamber (21) to the preset temperature T_set, and then enter the temperature maintenance stage. The power of the heater (7) is dynamically adjusted by the PID control algorithm to keep the water temperature stable within the range of T_set ±ΔT. S4: Start the centrifugal water pump (81) of the water circulation unit (8) and the air compressor of the compressed air unit (6) to mix the filtered water and compressed air in the front coil (41) of the flushing unit (4) to generate a high-pressure flushing water flow to flush the inner wall of the flushing chamber (22) and the rotating disc (25), and perform water quality monitoring circulation during the cleaning process; S5: The water quality parameters of the circulating water are collected in real time by the detection unit (9). The water quality parameters include conductivity value K, turbidity value Z and particle size value P. S6: Compare the real-time collected conductivity value K, turbidity value Z, and particle size value P with the preset conductivity threshold K_set, turbidity threshold Z_set, and particle size threshold P_set, respectively; if K≤K_set, Z≤Z_set, and P≤P_set, then the self-cleaning is determined to be complete, and proceed to S7; otherwise, return to step S4. S7: Control the drainage unit (5) to open the valve to discharge the used cleaning fluid. The human-machine interface (101) will issue an audio prompt and display the text "Self-cleaning complete".

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