Liquid plasma sterilization system, control method thereof, and cleaning apparatus

Abstract

The application relates to the technical field of liquid-phase plasma sterilization, and particularly discloses a liquid-phase plasma sterilization system, a control method thereof and a cleaning device.The sterilization system comprises a disinfectant water preparation device, a liquid level detection device and a control module.The disinfectant water preparation device comprises a liquid storage structure and a plasma generation unit.The liquid level detection device comprises a float and a first liquid level detection mechanism.The first liquid level detection mechanism comprises multiple first sensing components arranged in sequence along the height direction of the liquid storage structure.The multiple first sensing components are distributed on the upper and lower sides of a preset water inlet level.When the water in the liquid storage structure reaches the water inlet level, the multiple first sensing components can all trigger the float and generate sensing signals.The application can judge whether the liquid storage structure reaches the preset water inlet level through the sensing signals of the multiple first sensing components during the water inlet process, can reduce errors, improve the detection accuracy, and can effectively avoid the problems of large detection errors and low precision of a single sensing component.

Description

Technical Field

[0001] This invention relates to the field of liquid phase plasma sterilization technology, specifically to a liquid phase plasma sterilization system, its control method, and cleaning equipment. Background Technology

[0002] With the improvement of living standards, cleaning equipment with disinfection functions, such as dishwashers, has gradually entered ordinary households, freeing up hands and improving the quality of life. Current dishwashers generally use high-temperature rinsing and high-temperature drying for sterilization, which suffers from low efficiency and long processing times. Liquid-phase plasma technology applied to dishwasher sterilization is an emerging and cutting-edge technology. It features excellent sterilization performance, high efficiency, fast speed, and no consumables, showing promising application prospects.

[0003] To ensure the disinfection effect of disinfectant water prepared by liquid-phase plasma, the water volume in the reaction vessel must be precisely controlled to ensure the disinfectant concentration meets expectations. Therefore, a liquid level detection device is needed to monitor the water inlet information of the reaction vessel. However, since the disinfectant solution prepared by liquid-phase plasma is acidic in the reaction vessel and contains a certain amount of ozone, traditional contact-based liquid level detection methods, such as probe detection, are not suitable because probes will corrode in acidic solutions over a long period of time, seriously affecting the product's lifespan. While existing non-contact liquid level detection methods can avoid the above problems, they suffer from low detection accuracy. Summary of the Invention

[0004] In view of this, the present invention provides a liquid phase plasma sterilization system, its control method and cleaning equipment, to solve the problem of low liquid level detection accuracy in the prior art.

[0005] In a first aspect, the present invention provides a liquid-phase plasma sterilization system, comprising a disinfectant preparation device, a liquid level detection device, and a control module. The disinfectant preparation device includes a liquid storage structure and a plasma generating unit. The plasma generated by the electrolysis of the plasma generating unit is suitable for dissolving in the water of the liquid storage structure to prepare disinfectant. The liquid level detection device includes a float disposed within the liquid storage structure and a first liquid level detection mechanism fixedly disposed on the outer wall of the liquid storage structure. The first liquid level detection mechanism includes a plurality of first sensing components arranged sequentially along the height direction of the liquid storage structure. The plurality of first sensing components are distributed on the upper and lower sides of a preset inlet water level. When the water in the liquid storage structure reaches the preset inlet water level, the plurality of first sensing components can trigger the float and generate a sensing signal. The control module is connected to the liquid level detection device and is adapted to determine whether the water in the liquid storage structure has reached the preset inlet water level based on the sensing signal fed back by the first liquid level detection mechanism.

[0006] Beneficial effects: By sequentially arranging multiple first sensing components along the height of the liquid storage structure, when the water level in the liquid storage structure reaches the preset water level, all of the multiple first sensing components can be triggered. Thus, during the water inlet process, the sensing signals of multiple first sensing components can be used to determine whether the liquid storage structure has reached the preset water level, which can reduce errors, improve detection accuracy, avoid sensing errors caused by sensing range, and effectively solve the problems of large detection errors and low accuracy of a single sensing component.

[0007] In one alternative implementation, a plurality of first sensing components are symmetrically arranged on both sides of a preset water inlet level.

[0008] Beneficial effects: By symmetrically arranging multiple first sensing components on both sides of the preset water inlet level, the water inlet level is located in the middle of the overlapping area of ​​the multiple first sensing components, which further improves the accuracy of water level detection and avoids the phenomenon that the overlapping area deviates from the water inlet level due to installation errors.

[0009] In one optional embodiment, the liquid level detection device further includes a second liquid level detection mechanism, which is fixedly installed on the outer wall of the liquid storage structure and is lower than the first liquid level detection mechanism. The second liquid level detection mechanism is adapted to trigger the float and generate a sensing signal when the water level in the liquid storage structure reaches a preset drainage level during the drainage process of the liquid storage structure.

[0010] Beneficial effects: The second liquid level detection mechanism facilitates monitoring of the liquid level in the storage structure during the discharge of disinfectant after preparation. When the second liquid level detection mechanism detects that the water level in the storage structure has dropped to the preset drainage level, it sends a signal to the control module, which then promptly terminates the disinfectant discharge program to avoid resource waste caused by empty discharge.

[0011] In one optional embodiment, the second liquid level detection mechanism includes a second sensing component fixedly disposed at the bottom of the side wall of the liquid storage structure, wherein both the first sensing component and the second sensing component are Hall sensors.

[0012] In one optional embodiment, the top of the liquid storage structure is provided with an overflow port, and the liquid phase plasma sterilization system also includes an overflow device. The overflow device is located outside the liquid storage structure and includes an overflow cavity connected to the overflow port and an overflow detection mechanism located in the overflow cavity. The overflow detection mechanism is used to detect whether there is overflow liquid in the overflow cavity.

[0013] Beneficial effects: With the overflow port, when an external component malfunctions and causes abnormal water intake, excess water can flow out from the overflow port and into the overflow chamber outside the liquid storage structure, improving safety. In addition, the overflow detection mechanism can promptly determine whether the liquid storage structure has overflowed, facilitating immediate follow-up treatment, thus enhancing the level of intelligence.

[0014] In one optional embodiment, the overflow detection mechanism includes a first electrode and a second electrode, which are spaced apart and disposed on the bottom wall of the overflow cavity. The first electrode and the second electrode have a conductive state and an open-circuit state. When liquid overflows from the storage structure into the overflow cavity, the first electrode and the second electrode switch from the open-circuit state to the conductive state. The overflow detection mechanism also includes a detection circuit, which is electrically connected to the first electrode and the second electrode respectively, and is adapted to determine whether the storage structure has overflowed based on the state changes of the first electrode and the second electrode.

[0015] Beneficial effects: The first and second electrodes are spaced apart on the bottom wall of the overflow chamber. When water overflows into the overflow chamber, the first and second electrodes become conductive, allowing the detection circuit to detect this change in state and determine whether the liquid storage structure has overflowed. Using two spaced electrodes to determine whether the liquid storage structure has overflowed is a simple, low-cost, and easy-to-use method for widespread application.

[0016] In one alternative embodiment, the liquid phase plasma sterilization system is suitable for providing disinfectant water to cleaning equipment with disinfection function. The overflow device further includes a return pipe and a first switch. The return pipe is disposed between the overflow chamber and the washing chamber of the cleaning equipment. Water overflowing into the overflow chamber can be discharged into the dishwasher through the return pipe. The first switch is disposed on the return pipe and is used to control the on / off state of the return pipe.

[0017] Beneficial effects: Through the set return pipeline and the first switch, the water overflowing into the overflow chamber can be discharged into the cleaning equipment, which facilitates the recycling of overflow water and avoids the waste of water resources.

[0018] In one alternative embodiment, the overflow device further includes a discharge pipe and a second switch, the discharge pipe being connected to a discharge port for discharging water from the overflow chamber to the outside, and the second switch for controlling the on / off state of the discharge pipe.

[0019] Beneficial effects: By setting up the discharge pipeline and the second switch, the discharge of overflow water can be automatically controlled by controlling the on / off state of the second switch.

[0020] In one alternative embodiment, a one-way valve is provided at the overflow port, the one-way valve being configured to allow liquid to flow unidirectionally from the inner cavity of the liquid storage structure to the overflow cavity.

[0021] Beneficial effect: By using a one-way valve with unidirectional flow at the overflow port, it is ensured that the valve will only be opened when the liquid storage structure overflows, and the water in the overflow chamber will not flow back into the liquid storage structure.

[0022] Secondly, the present invention also provides a control method for a liquid phase plasma sterilization system. The control method for the liquid phase plasma sterilization system is implemented by the liquid phase plasma sterilization system described in any of the above embodiments. The control method includes: activating the disinfectant preparation mode; controlling the water inlet mechanism to introduce water into the liquid storage structure; during the water inlet process of the liquid storage structure, if it is determined that multiple first sensing components are triggered by the float, it can be determined that the liquid storage structure has reached the preset water inlet level, and then the water inlet mechanism is controlled to stop introducing water.

[0023] Beneficial effects: When multiple first sensing components emit sensing signals, it can be determined that the water level has reached the preset water inlet level, and water intake will stop. By setting multiple first sensing components to detect the water level, errors can be reduced and the accuracy of water level detection can be improved.

[0024] In one optional implementation, the total number of the first sensing components is set to n, and the number of the first sensing components triggered by the float during the water intake process is m. The control method further includes the following steps: during the water intake process of the storage structure: if it is determined that m < n, then continue to inject water into the storage structure until m = n; if it is determined that m = n, then it can be inferred that the storage structure has reached the preset water intake level, and then stop injecting water into the storage structure.

[0025] Beneficial effects: When it is determined that the number m of the first sensing components triggered by the float is less than the total number n of the first sensing components, it can be inferred that the actual liquid level has not yet reached the preset water level. Water continues to be introduced until the number m of the first sensing components triggered by the float is equal to the total number n of the first sensing components. Then, water introduction stops. By adopting the above method, combined with the changes in the water volume of the storage structure and the changes in the detection signals of multiple first sensing components, accurate measurement of the liquid level information of the storage structure can be achieved, and the error rate can be reduced to 1% or even less.

[0026] In one optional embodiment, the control method further includes the following steps: after determining that the water in the liquid storage structure has reached a preset inlet water level, controlling the plasma generating unit to start preparing disinfectant water; after determining that the disinfectant water preparation is complete, controlling the liquid storage structure to discharge disinfectant water to the cleaning equipment; during the process of discharging disinfectant water, if a sensing signal from the second liquid level detection mechanism is received, it can be determined that the disinfectant water in the liquid storage structure has been completely discharged, and the disinfectant water discharge procedure ends.

[0027] Beneficial effects: During the process of discharging disinfectant, the second liquid level detection mechanism monitors whether the water level drops to the preset drainage level. This allows the system to determine whether the disinfectant in the storage structure has been completely discharged based on the changes in the sensing signal from the second liquid level detection mechanism, facilitating subsequent procedures.

[0028] In one optional implementation, the control method further includes the following steps: during the process of water entering the liquid storage structure, if it is determined that the first electrode and the second electrode are in a conductive state, it can be inferred that the liquid storage structure has overflowed, and an alarm is triggered to notify the user.

[0029] Beneficial effects: When the first and second electrodes are connected, it can be inferred that the liquid storage structure has overflowed or there is an abnormality in water ingress. At this time, an alarm will be set up in time to remind the user, so that the user can deal with it as soon as possible and avoid property damage or related safety hazards.

[0030] In one alternative implementation, after it is deduced that an overflow has occurred in the storage structure, the following steps are performed: controlling the first switch to open, connecting the return pipeline between the overflow chamber and the cleaning equipment, and discharging the water in the overflow chamber into the cleaning equipment.

[0031] Beneficial effects: When the liquid storage structure overflows, the water flowing into the overflow chamber can be discharged into the cleaning equipment by controlling the first switch to open, thereby realizing the recycling and utilization of water resources.

[0032] In one alternative implementation, after it is deduced that an overflow has occurred in the liquid storage structure, the following steps are performed before the first switch is opened: determining whether the cleaning equipment has completed the water inlet procedure; if yes, then controlling the first switch to remain closed; if no, then controlling the first switch to open the return pipeline.

[0033] Beneficial effects: Before controlling the discharge of water from the overflow chamber to the cleaning equipment, a step is added to determine whether the cleaning equipment has completed the water intake process. This avoids the problem of excessive water intake after the cleaning equipment has completed the water intake process, which would affect the cleaning effect of the cleaning equipment and cause unnecessary waste of resources.

[0034] Thirdly, the present invention also provides a cleaning device, including a washing chamber and a liquid-phase plasma sterilization system according to any of the above embodiments, wherein the disinfectant water prepared by the liquid-phase plasma sterilization system is suitable for being introduced into the washing chamber for disinfection.

[0035] In one alternative embodiment, the cleaning device includes a dishwasher, which includes an inner tank with a washing chamber. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the liquid phase plasma sterilization system in an embodiment of the present invention;

[0038] Figure 2 for Figure 1 Enlarged view of point A;

[0039] Figure 3 This is a schematic diagram of one embodiment of the liquid level detection device in this invention.

[0040] Figure 4 This is a schematic flowchart illustrating one embodiment of the control method for the liquid phase plasma sterilization system in this invention.

[0041] Figure 5 This is a schematic flowchart illustrating another embodiment of the control method for the liquid phase plasma sterilization system in this invention.

[0042] Figure 6 This is a schematic flowchart illustrating another embodiment of the control method for the liquid phase plasma sterilization system in this invention.

[0043] Figure 7 This is a schematic flowchart illustrating another embodiment of the control method for the liquid phase plasma sterilization system in this invention.

[0044] Figure 8 This is a schematic flowchart illustrating another embodiment of the control method for the liquid phase plasma sterilization system in this invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] 10. Liquid storage structure; 101. Overflow port; 102. Pressure relief port; 103. Float chamber;

[0047] 20. Plasma generation unit; 21. Discharge electrode; 22. Reaction tube; 23. Bubble stone;

[0048] 30. Liquid level detection device; 31. First liquid level detection mechanism; 311. First sensing component; 32. Second liquid level detection mechanism; 33. Liquid level detection plate; 34. Float;

[0049] 40. Overflow device; 41. Overflow chamber; 410. Discharge port; 42. Overflow detection mechanism; 421. First electrode; 422. Second electrode; 43. Return pipeline; 431. First switching element; 44. Check valve;

[0050] 50. Cleaning equipment. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of this invention, it should be noted that, 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 can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0055] With the improvement of living standards, dishwashers, as an example, cleaning equipment with disinfection functions have gradually entered ordinary households, freeing up hands and improving the quality of life. Existing dishwashers generally use high-temperature rinsing and high-temperature drying for sterilization, which suffers from low efficiency and long processing times. Liquid-phase plasma technology applied to dishwasher sterilization is an emerging and cutting-edge technology. It features excellent sterilization performance, high efficiency, fast speed, and no consumables, showing promising application prospects.

[0056] To ensure the disinfection effect of the disinfectant water prepared by liquid-phase plasma, the water volume in the reaction vessel needs to be precisely controlled to ensure that the disinfectant concentration meets expectations. Therefore, a liquid level detection device 30 is required to monitor the water inlet information of the reaction vessel. However, since the liquid-phase plasma generates ozone gas during the discharge process, producing an acidic liquid with a pH of around 2.0, traditional contact-type liquid level detection methods are not suitable. For example, probe detection is not suitable because typical probe-based contact liquid level detection methods will cause the probe to corrode in a short period of time, affecting its service life.

[0057] However, while existing non-contact liquid level detection methods can avoid the aforementioned problems, they suffer from low detection accuracy. Specifically, common sensing components can be triggered and emit corresponding sensing signals when the detected terminal is within its set sensing range. Since the triggering of the sensing component is within a certain range, during the process of water entering the reaction vessel, the following situation may occur: the actual liquid level in the reaction vessel has not yet reached the preset water level, but the detected terminal is already within the sensing range of the sensing component, causing the sensing component to be triggered, which can easily lead to detection errors.

[0058] The following is combined Figures 1 to 8 The following describes embodiments of the present invention.

[0059] According to an embodiment of the present invention, in one aspect, the present invention provides a liquid phase plasma sterilization system, which includes a disinfectant preparation device, a liquid level detection device 30, and a control module.

[0060] Specifically, such as Figures 1 to 3 As shown, the disinfectant preparation device includes a liquid storage structure 10 and a plasma generating unit 20. The plasma generated by the electrolysis of the plasma generating unit 20 is suitable for dissolving in the water of the liquid storage structure 10 to prepare disinfectant. The liquid level detection device 30 includes a float 34 disposed within the liquid storage structure 10 and a first liquid level detection mechanism 31 fixedly disposed on the outer wall of the liquid storage structure 10. The first liquid level detection mechanism 31 includes a plurality of first sensing elements 311 arranged sequentially along the height direction of the liquid storage structure, distributed above and below a preset inlet water level. When the water in the liquid storage structure 10 reaches the preset inlet water level, all the first sensing elements 311 can trigger the float 34 and generate a sensing signal. The control module is connected to the liquid level detection device 30 and is adapted to determine whether the water in the liquid storage structure 10 has reached the preset inlet water level based on the sensing signal fed back by the first liquid level detection mechanism 31.

[0061] In the above embodiment, by sequentially arranging multiple first sensing components 311 along the height direction of the liquid storage structure 10, when the water in the liquid storage structure 10 reaches the preset water level, all of the multiple first sensing components 311 can be triggered. Thus, during the water inlet process, the sensing signals of the multiple first sensing components 311 can be used to determine whether the liquid storage structure 10 has reached the preset water level, which can reduce errors, improve detection accuracy, avoid sensing errors caused by sensing range, and effectively solve the problem of large detection errors and low accuracy of a single sensing component.

[0062] In some embodiments, the height direction of the liquid storage structure is vertical, that is, a plurality of first sensing components 311 are arranged sequentially along the vertical direction.

[0063] In this embodiment, when the water level in the liquid storage structure 10 reaches the preset water level, the float 34 is within the sensing range of any one of the first sensing components 311. That is, when the preset water level is reached, multiple first sensing components 311 will be triggered. During the water intake process, if the number of triggered first sensing components 311 is less than the total number of first sensing components 311, it indicates that the actual liquid level has not yet reached the preset water level, so water intake continues until all first sensing components 311 are triggered, indicating that the preset water level has been reached, and water intake stops.

[0064] Furthermore, in this embodiment, the position of the float 34 is detected by a sensing component. Since the sensing component has a sensing range, when a single sensing component is used for liquid level detection, the float 34 will emit a sensing signal as soon as it enters this sensing range, resulting in a certain error. To avoid the above error, this embodiment sets multiple first sensing components 311. The sensing ranges of the multiple first sensing components 311 will form an overlapping area, which covers the preset water inlet level. The smaller the area of ​​the overlapping area, the higher the detection accuracy. When the float 34 rises to the preset water inlet level, it will be within this overlapping area, and multiple first sensing components 311 can emit a float 34 position sensing signal, thus more accurately determining whether the preset water inlet level has been reached.

[0065] It should be noted that in this embodiment, the researchers conducted extensive experiments and calculations to reasonably set the specific number, spacing, and coverage of the first sensing components 311, ensuring that all the first sensing components 311 could sense and trigger the float 34 when it was at the inlet water level. However, due to the differences in sensing range and other parameters of different models of sensing components, this embodiment specifically limits the specific number, spacing, and coverage of the first sensing components 311.

[0066] Optionally, such as Figure 1 As shown, the liquid storage structure 10 is a water tank. The water tank is equipped with a pressure relief port 102, which is higher than the maximum water level of the tank. The pressure relief port 102 helps to balance the internal and external air pressures of the liquid storage structure 10, and excess gas during ionization can also be discharged through this port. A float 34 is installed inside the water tank and rises with the water level. Optionally, the pressure relief port 102 is located on the top wall of the water tank.

[0067] In some embodiments, combined with Figure 1 and Figure 3 As shown, multiple first sensing components 311 are symmetrically arranged on both sides of the preset water inlet level.

[0068] In the above embodiment, by symmetrically arranging multiple first sensing components 311 on both sides of a preset water inlet level, the water inlet level is located in the middle of the overlapping area of ​​the multiple first sensing components 311, which further improves the accuracy of water level detection and avoids the phenomenon of the overlapping area deviating from the water inlet level due to installation errors, etc.

[0069] In some preferred embodiments, multiple first sensing components 311 are arranged vertically adjacent to each other on the upper and lower sides of the preset water inlet level, saving installation space and also preventing the far-reaching overlapping areas from failing to cover the float 34 at the water inlet level.

[0070] In some preferred embodiments, a plurality of first sensing components 311 are evenly distributed on the upper and lower sides of a preset water inlet level. For example, there are two first sensing components 311 arranged vertically on the upper and lower sides of the preset water inlet level. Alternatively, there are four first sensing components 311 evenly distributed on the upper and lower sides of the preset water inlet level.

[0071] Preferably, in this embodiment, the number of first sensing components 311 is an even number, and they are evenly distributed on both sides of the preset water inlet level.

[0072] Of course, in this embodiment, the number of first sensing components 311 is not limited to an even number, but can also be an odd number. For example, there are three first sensing components 311, one of which is located in the middle position corresponding to the preset water inlet level, and the other two are located on the upper and lower sides of the middle first sensing component 311.

[0073] In some embodiments, the liquid level detection device 30 further includes a second liquid level detection mechanism 32, which is fixedly installed on the outer wall of the liquid storage structure 10 and is lower than the first liquid level detection mechanism 31. The second liquid level detection mechanism 32 is adapted to trigger the float 34 and generate a sensing signal when the water level in the liquid storage structure 10 reaches a preset drainage level during the drainage process of the liquid storage structure 10.

[0074] In the above embodiment, the second liquid level detection mechanism 32 facilitates the monitoring of the liquid level in the storage structure 10 during the discharge of disinfectant after the disinfectant is prepared. When the second liquid level detection mechanism 32 detects that the water in the storage structure 10 has dropped to the preset drainage level, it sends a signal to the control module, which then promptly terminates the disinfectant discharge program to avoid the waste of resources caused by empty discharge.

[0075] In some embodiments, the second liquid level detection mechanism 32 includes a second sensing component fixedly disposed at the bottom of the side wall of the liquid storage structure 10. Preferably, the second sensing component is disposed at the bottommost part of the side wall of the liquid storage structure 10.

[0076] In some embodiments, both the first sensing element 311 and the second sensing element are Hall sensors. Of course, the first sensing element 311 and the second sensing element are not limited to Hall sensors, but can also be magnetic switches, inductive switches, reed switches, or other similar proximity switches.

[0077] In this embodiment, the float 34 is provided with a detection terminal that can be sensed by the first sensing component 311 and the second sensing component. The detection terminal may be a magnetic component with a density less than that of water. The magnetic component may include a magnet or a lodestone. To ensure that the density of the magnetic component is less than that of water, the surface of the magnet or lodestone may be covered with a lightweight material. The lightweight material is preferably, but not limited to, foam or plastic.

[0078] This embodiment uses a non-contact liquid level detection scheme. During the water inlet process, the liquid level is detected by the change of signals from multiple first sensing components 311. During the drainage process, the liquid level is determined by a second sensing component.

[0079] In some embodiments, the liquid level detection device 30 includes a liquid level detection plate 33 installed on the outer wall of the liquid storage structure 10. Optionally, the liquid level detection plate 33 is a PCB board. A plurality of first sensing components 311 and second sensing components are arranged on one side of the liquid level detection plate 33. The second sensing components are installed at the bottom of the liquid level detection plate 33, and the plurality of first sensing components 311 are evenly distributed on both sides of a preset inlet water level.

[0080] Specifically, at least one surface of the sidewall of the liquid storage structure 10 is a flat plane that can be fitted with the liquid level detection plate 33 for attaching the liquid level detection plate 33. Simultaneously, the sidewall of the liquid storage structure 10 can prevent water and dust from entering the first sensing element 311 and the second sensing element. Optionally, a detection chip is provided on the liquid level detection plate 33. The detection chip can detect the level signal changes of the first sensing element 311 and the second sensing element, and thus determine whether a preset inlet or outlet water level has been reached by observing the changes in the level signals of the first sensing element 311 and the second sensing element.

[0081] It should be noted that the preset water level in this embodiment refers to the amount of water required to prepare one batch of disinfectant. Since there will be a certain error in the conduction of each first sensing component 311, multiple first sensing components 311 are used to collect data. When the actual liquid level reaches the preset water level, the multiple first sensing components 311 evenly distributed on both sides can all conduct and generate a sensing signal.

[0082] In some embodiments, as the float 34 approaches the first sensing component 311 and the second sensing component, its output level changes, switching from a low level to a high level, or vice versa. In some specific embodiments, during the water intake process, when the water level reaches a preset intake level, the first sensing component 311 can sense the float 34 and switch from a high level to a low level. During the disinfectant discharge process, when the water level drops to a preset discharge level, the second sensing component can sense the float 34 and switch from a low level to a high level.

[0083] In some embodiments, combined with Figure 1 and Figure 2 As shown, the top of the liquid storage structure 10 is provided with an overflow port 101. The liquid phase plasma sterilization system also includes an overflow device 40. The overflow device 40 is located outside the liquid storage structure 10. The overflow device 40 includes an overflow cavity 41 connected to the overflow port 101 and an overflow detection mechanism 42 located in the overflow cavity 41. The overflow detection mechanism 42 is used to detect whether there is overflow liquid in the overflow cavity 41.

[0084] In the above embodiment, by providing an overflow port 101, when an external device malfunctions and causes an abnormal water intake, excess water can flow out from the overflow port 101 and into the overflow cavity 41 outside the liquid storage structure 10, improving the safety of use. In addition, by providing an overflow detection mechanism 42, it is possible to determine in a timely manner whether the liquid storage structure 10 has overflowed, which facilitates subsequent processing as soon as possible, and the level of intelligence is higher.

[0085] In some embodiments, the overflow detection mechanism 42 includes a first electrode 421 and a second electrode 422, which are spaced apart on the bottom wall of the overflow cavity 41. The first electrode 421 and the second electrode 422 have a conductive state and an open-circuit state. When the liquid in the liquid storage structure 10 overflows into the overflow cavity 41, the first electrode 421 and the second electrode 422 switch from the open-circuit state to the conductive state. The overflow detection mechanism 42 also includes a detection circuit, which is electrically connected to the first electrode 421 and the second electrode 422 respectively, and is adapted to determine whether the liquid storage structure 10 has overflowed based on the state changes of the first electrode 421 and the second electrode 422.

[0086] In the above embodiment, the first electrode 421 and the second electrode 422 are spaced apart and disposed on the bottom wall of the overflow cavity 41. When water overflows into the overflow cavity 41, the first electrode 421 and the second electrode 422 will become conductive. At this time, the detection circuit can detect this state change and thus determine whether the liquid storage structure 10 has overflowed. Using two spaced electrodes to determine whether the liquid storage structure 10 has overflowed is simple in structure, low in cost, and easy to use and promote.

[0087] In some more specific embodiments, the first electrode 421 and the second electrode 422 are metal electrode sheets, and the two metal electrode sheets are laid alternately on the bottom wall of the overflow cavity 41.

[0088] It should be noted that the overflow detection mechanism 42 in this embodiment is not limited to the structure described above, and can also be used for detection, such as a liquid level sensor or a pressure sensor. Compared with a liquid level sensor or a pressure sensor, this embodiment uses two electrode plates, which has higher detection accuracy and sensitivity. As long as there is a little water flowing out, the two electrode plates can be connected.

[0089] In some preferred embodiments, the bottom wall of the overflow chamber 41 is provided with a discharge port 410 for discharging water from the overflow chamber 41. The bottom wall of the overflow chamber 41 includes an installation area for mounting the first electrode 421 and the second electrode 422 and a gap area located between the first electrode 421 and the second electrode 422. The discharge port 410 is opened in the gap area. This design avoids the two electrodes from obstructing the discharge of overflow water.

[0090] In some more preferred embodiments, the first electrode 421 and the second electrode 422 are inclined, and both the first electrode 421 and the second electrode 422 are gradually inclined downward from the end away from the discharge port 410 towards the end closer to the discharge port 410. This design makes the first electrode 421 and the second electrode 422 form a structure similar to a guide plate, which plays a role in guiding and converging the flow and improving the water discharge efficiency.

[0091] In some embodiments, the liquid phase plasma sterilization system is adapted to provide disinfectant water to the cleaning equipment 50 with disinfection function. The overflow device 40 also includes a return pipe 43 and a first switch 431. The return pipe 43 is disposed between the overflow chamber 41 and the washing chamber of the cleaning equipment 50. Water overflowing into the overflow chamber 41 can be discharged into the dishwasher through the return pipe 43. The first switch 431 is disposed on the return pipe 43 and is used to control the on / off state of the return pipe 43.

[0092] In the above embodiment, the overflow chamber 41 is independent of the inner cavity of the liquid storage structure 10. Through the provided return pipe 43 and the first switch 431, the water overflowing into the overflow chamber 41 can be discharged into the cleaning equipment 50, which facilitates the recycling of overflow water and avoids the waste of water resources.

[0093] Optionally, the first switch 431 is a solenoid valve, and the cleaning device 50 is a dishwasher. The dishwasher has a washing chamber inside its inner tub. In actual use, the first switch 431 can be controlled to open the return pipe 43, and the water in the overflow chamber 41 can be discharged into the inner tub of the dishwasher for cleaning tableware, thereby realizing the recycling of overflow water.

[0094] In some embodiments, when the overflow detection mechanism 42 detects an overflow in the liquid storage structure 10, the first switch 431 can be controlled to open.

[0095] In some embodiments, the overflow device 40 further includes a discharge pipe and a second switch, the discharge pipe being connected to the discharge port 410 for discharging water in the overflow chamber 41 to the outside, and the second switch being used to control the opening and closing of the discharge pipe.

[0096] In the above embodiments, the discharge of overflow water can be automatically controlled by controlling the on / off state of the second switch through the provided discharge pipeline and the second switch.

[0097] In some embodiments, a one-way valve 44 is provided at the overflow port 101, and the one-way valve 44 is configured to allow liquid to flow unidirectionally from the inner cavity of the liquid storage structure 10 to the overflow chamber 41. Optionally, the one-way valve 44 is a valve plate.

[0098] In the above embodiment, by providing a one-way valve 44 with one-way conduction in the overflow port 101, it is ensured that the one-way valve 44 will only be pushed open when the liquid storage structure 10 overflows, and the water in the overflow chamber 41 will not flow back into the liquid storage structure 10.

[0099] It should be noted that in this embodiment, the overflow port 101 is located between the preset water inlet level and the maximum limit water level of the liquid storage structure 10, thereby avoiding the water inlet from exceeding the maximum limit water level and causing related safety hazards.

[0100] Because the top of the liquid storage structure 10 has a pressure relief port that does not affect other electrical components, the internal and external air pressure of the liquid storage structure 10 is balanced. The gas cannot push open the one-way valve 44. The one-way valve 44 can only be opened when the water in the liquid storage structure 10 overflows to the overflow port 101. This can effectively prevent ozone and other gases in the liquid storage structure 10 from flowing through the first switch 431 and the second switch and causing ozone corrosion to the materials in contact with the inside of the first switch 431 and the second switch, thus reducing the life of the device.

[0101] The following is combined Figure 1 , Figure 2 The specific structure and working principle of the liquid phase plasma sterilization system in this embodiment are described in detail.

[0102] The water storage structure has an inlet and an outlet. The liquid-phase plasma sterilization system includes an inlet mechanism, which includes an inlet pipe connecting the water source and the inlet, and an inlet valve is installed on the inlet pipe. The plasma generator includes a discharge electrode 21, a ground electrode, and a reaction tube 22. The reaction tube 22 is located inside the water storage structure. One end of the discharge electrode 21 is inserted into the reaction tube 22, and the other end is connected to the live wire of the power supply device. The ground electrode is located inside the water storage structure and is adapted to be connected to the neutral wire of the power supply device. The water storage structure also has a float 34 limiting structure. A float cavity 103 extending along the height direction is formed in the float 34 limiting structure. A water inlet is formed on the limiting structure. The float 34 is placed in the float cavity 103 and is adapted to slide along the float cavity 103. The top of the float cavity 103 is also provided with an anti-detachment protrusion to prevent the float 34 from detaching from the float cavity 103. In this embodiment, the float 34 can move up and down within the float cavity 103, and the anti-detachment protrusion can prevent the float 34 from coming off from the top, and it is not easy for the float 34 to stick together.

[0103] Furthermore, the liquid-phase plasma sterilization system also includes a porous structure, wherein an air inlet channel is formed inside the reaction tube 22, the air inlet end is suitable for introducing air, and the air inlet channel is arranged around the discharge electrode 21. The bottom of the reaction tube 22 is provided with an air outlet end connecting the liquid storage structure 10 and the reaction tube 22. The porous structure is disposed within the water storage structure, and the porous structure is connected to the air outlet end of the air inlet channel. Optionally, the porous structure is an air bubble 23.

[0104] The liquid-phase plasma sterilization system provided in this embodiment adopts a non-contact water level detection method, which eliminates corrosion problems, has higher detection accuracy, uses fewer parts, has a simpler structure, and lower cost.

[0105] According to an embodiment of the present invention, in another aspect, a control method for a liquid-phase plasma sterilization system is provided. This control method is implemented using the liquid-phase plasma sterilization system of any of the above embodiments, combined with... Figures 1 to 4As shown, the control method includes the following steps:

[0106] Step S101: Start the disinfectant preparation mode;

[0107] Step S102: Control the water inlet mechanism to supply water to the liquid storage structure 10;

[0108] Step S103: During the process of water entering the liquid storage structure 10, if it is determined that multiple first sensing components 311 are triggered by the float 34, it can be determined that the liquid storage structure 10 has reached the preset water level.

[0109] Step S104: Control the water inlet mechanism to stop water intake.

[0110] In the above embodiment, when multiple first sensing components 311 all emit sensing signals, it can be determined that the water level has reached the preset water inlet level, and water intake is stopped. By setting multiple first sensing components 311 to detect the water level, errors can be reduced and the accuracy of water level detection can be improved.

[0111] In some embodiments, combined with Figures 1 to 3 as well as Figure 8 As shown, the total number of the first sensing components 311 is set to n, and the number of the first sensing components 311 triggered by the float 34 during the water intake process is m. The control method further includes the following steps: during the water intake process of the liquid storage structure 10: if it is determined that m < n, then continue to inject water into the liquid storage structure 10 until m = n; if it is determined that m = n, then it can be inferred that the liquid storage structure 10 has reached the preset water intake level, and then stop injecting water into the liquid storage structure 10.

[0112] In the above embodiment, when it is determined that the number m of the first sensing components 311 triggered by the float 34 is less than the total number n of the first sensing components 311, it can be inferred that the actual liquid level has not yet reached the preset water inlet level. Water continues to be introduced until the number m of the first sensing components 311 triggered by the float 34 is equal to the total number n of the first sensing components 311. Then, water introduction stops. By adopting the above method, combining the water volume change of the liquid storage structure 10 and the change of the detection signal of the multiple first sensing components 311, the liquid level information of the liquid storage structure 10 can be accurately measured, and the error rate can be reduced to 1% or even less.

[0113] For example, in some more specific implementations, if it is determined that the output level of multiple first sensing components 311 is low during the water intake process, it can be determined that the water intake has reached the preset water intake level, and then the water intake will end.

[0114] In some embodiments, combined with Figures 1 to 3 as well as Figure 5 As shown, the control method further includes the following steps:

[0115] Step S201: After determining that the water in the liquid storage structure 10 has reached the preset water level, control the plasma generation unit 20 to start preparing disinfectant water;

[0116] Step S202: After determining that the disinfectant preparation is complete, control the liquid storage structure 10 to discharge the disinfectant into the cleaning equipment 50;

[0117] Step S203: If a sensing signal from the second liquid level detection mechanism 32 is received during the process of discharging disinfectant, it can be determined that the disinfectant in the liquid storage structure 10 has been completely discharged.

[0118] Step S204: End the disinfectant discharge procedure.

[0119] In the above embodiment, the second liquid level detection mechanism 32 monitors whether the water level drops to the preset drainage level during the process of discharging disinfectant water. Thus, the change in the sensing signal of the second liquid level detection mechanism 32 can determine whether the disinfectant water in the storage structure 10 has been completely discharged, which facilitates the subsequent procedures.

[0120] For example, in some more specific implementations, if the output level of the second sensing component is detected to switch to a high level during the process of discharging disinfectant water, it can be determined that the drainage water level has been reached, and the disinfectant water discharge procedure is terminated.

[0121] In some embodiments, combined with Figures 1 to 3 as well as Figure 6 As shown, the control method further includes the following steps:

[0122] Step S301: During the process of water entering the liquid storage structure 10, if it is determined that the first electrode 421 and the second electrode 422 are in a conductive state, it can be inferred that the liquid storage structure 10 has overflowed and an alarm is triggered to notify the user.

[0123] In the above embodiment, when the first electrode 421 and the second electrode 422 are connected, it can be inferred that the liquid storage structure 10 has overflowed and the water inlet is abnormal. At this time, an alarm will be set up in time to remind the user so that the user can deal with it as soon as possible and avoid property damage or related safety hazards.

[0124] In some embodiments, after it is deduced that an overflow has occurred in the reservoir structure 10, such as Figure 6 As shown, the following steps are also performed:

[0125] Step S302: Control the first switch 431 to open, connect the return pipe 43 between the overflow chamber 41 and the cleaning equipment 50, and discharge the water in the overflow chamber 41 into the cleaning equipment 50.

[0126] In the above embodiment, when the liquid storage structure 10 overflows, the first switch 431 can be opened to discharge the water flowing into the overflow chamber 41 into the cleaning equipment 50, thereby realizing the recycling and utilization of water resources.

[0127] In some embodiments, such as Figure 6 As shown, the following steps are performed after step S303:

[0128] Step S303: If it is determined that the first electrode 421 and the second electrode 422 have switched from the conducting state to the open state, then the first switch 431 is turned off.

[0129] In the above steps, if it is determined that the first electrode 421 and the second electrode 422 are disconnected during the process of discharging overflow water into the cleaning equipment 50, it proves that the water in the overflow chamber 41 has been drained. At this time, the first switch 431 can be controlled to close.

[0130] In some embodiments, combined with Figures 1 to 3 as well as Figure 7 As shown, after it is deduced that the liquid storage structure 10 has overflowed, the following steps are performed before the first switch 431 is opened:

[0131] Step S401: Determine whether the cleaning equipment 50 has completed the water inlet process; if yes, proceed to step S402; if no, proceed to step S403.

[0132] Step S402: Control the first switch 431 to remain closed;

[0133] Step S403: Control the first switch 431 to open the return pipe 43.

[0134] In the above embodiment, before controlling the discharge of water from the overflow chamber 41 to the cleaning device 50, a step is added to determine whether the cleaning device 50 has completed the water intake process. This avoids the problem of excessive water intake affecting the cleaning effect of the cleaning device 50 and unnecessary waste of resources after the cleaning device 50 has completed the water intake process.

[0135] Thirdly, the present invention also provides a cleaning device 50, including a washing chamber and a liquid-phase plasma sterilization system according to any of the above embodiments, wherein the disinfectant water prepared by the liquid-phase plasma sterilization system is suitable for being introduced into the washing chamber for disinfection.

[0136] In some embodiments, the cleaning device 50 includes a dishwasher, which includes an inner tank with a washing chamber.

[0137] It should be noted that the cleaning device 50 in this embodiment is not limited to a dishwasher, but can also be other cleaning devices such as a washing machine.

[0138] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A control method for a liquid phase plasma sterilization system, characterized in that, The liquid-phase plasma sterilization system includes: The disinfectant preparation device includes a liquid storage structure (10) and a plasma generating unit (20), wherein the plasma generated by the electrolysis of the plasma generating unit (20) is suitable for dissolving in the water of the liquid storage structure (10) to prepare disinfectant. The liquid level detection device (30) includes a float (34) disposed in the liquid storage structure (10) and a first liquid level detection mechanism (31) fixedly disposed on the outer wall of the liquid storage structure (10). The first liquid level detection mechanism (31) includes a plurality of first sensing components (311) arranged sequentially along the height direction of the liquid storage structure (10). The plurality of first sensing components (311) are distributed on the upper and lower sides of a preset water inlet level. The plurality of first sensing components (311) are symmetrically arranged on both sides of the preset water inlet level. When the water in the liquid storage structure (10) reaches the preset water inlet level, the plurality of first sensing components (311) can trigger the float (34) and generate a sensing signal. The control module is connected to the liquid level detection device (30) and is adapted to determine whether the water in the liquid storage structure (10) has reached the preset water level based on the sensing signal fed back by the first liquid level detection mechanism (31). The control method includes: Start the disinfectant preparation mode; Control the water inlet mechanism to supply water to the liquid storage structure (10); During the process of water entering the liquid storage structure (10), if it is determined that multiple first sensing components (311) are triggered by the float (34), it can be determined that the liquid storage structure (10) has reached the preset water level, and the water entering mechanism is controlled to stop water entering. The total number of the first sensing components (311) is set to n, and the number of the first sensing components (311) triggered by the float (34) during the water intake process is set to m. The control method further includes the following steps: During the water intake process of the liquid storage structure (10): If it is determined that m < n, then continue to feed water into the liquid storage structure (10) until m = n; If it is determined that m=n, it can be inferred that the liquid storage structure (10) has reached the preset water level, and then the water supply to the liquid storage structure (10) is stopped.

2. The control method for the liquid phase plasma sterilization system according to claim 1, characterized in that, The control method further includes the following steps: After determining that the water in the liquid storage structure (10) has reached the preset water level, the plasma generation unit (20) is controlled to start preparing disinfectant water. After determining that the disinfectant preparation is complete, control the liquid storage structure (10) to discharge the disinfectant into the cleaning equipment (50); If a sensing signal is received from the second liquid level detection mechanism (32) during the process of discharging disinfectant, it can be determined that the disinfectant in the storage structure (10) has been completely discharged, and the disinfectant discharge procedure ends.

3. The control method for the liquid phase plasma sterilization system according to claim 1 or 2, characterized in that, The control method further includes the following steps: If it is determined that the first electrode (421) and the second electrode (422) are in a conductive state during the process of water entering the liquid storage structure (10), it can be inferred that the liquid storage structure (10) has overflowed, and an alarm will be triggered to remind the user.

4. The control method for the liquid phase plasma sterilization system according to claim 3, characterized in that, After determining that an overflow has occurred in the reservoir structure (10), the following steps are performed: The first switch (431) is opened to connect the return pipe (43) between the overflow chamber (41) and the cleaning equipment (50), and the water in the overflow chamber (41) is discharged into the cleaning equipment (50).

5. The control method for the liquid phase plasma sterilization system according to claim 4, characterized in that, After it is deduced that an overflow has occurred in the liquid storage structure (10), the following steps are performed before the first switch (431) is opened: Determine whether the cleaning equipment (50) has completed the water intake process; If yes, then control the first switch (431) to remain closed; if no, then control the first switch (431) to open the return pipe (43).

6. A liquid-phase plasma sterilization system, employing the control method of any one of claims 1 to 5, characterized in that, The liquid level detection device (30) further includes: The second liquid level detection mechanism (32) is fixedly installed on the outer wall of the liquid storage structure (10) and is lower than the first liquid level detection mechanism (31). The second liquid level detection mechanism (32) is adapted to trigger the float (34) and generate a sensing signal when the water level in the liquid storage structure (10) reaches the preset drainage water level during the drainage process of the liquid storage structure (10).

7. The liquid phase plasma sterilization system according to claim 6, characterized in that, The top of the liquid storage structure (10) is provided with an overflow port (101), and the liquid phase plasma sterilization system further includes: An overflow device (40) is provided on the outside of the liquid storage structure (10). The overflow device (40) includes an overflow cavity (41) connected to the overflow port (101) and an overflow detection mechanism (42) provided in the overflow cavity (41). The overflow detection mechanism (42) is used to detect whether there is overflow liquid in the overflow cavity (41).

8. The liquid phase plasma sterilization system according to claim 7, characterized in that, The overflow detection mechanism (42) includes: The first electrode (421) and the second electrode (422) are spaced apart on the bottom wall of the overflow cavity (41). The first electrode (421) and the second electrode (422) have a conductive state and a disconnected state. When the liquid in the liquid storage structure (10) overflows into the overflow cavity (41), the first electrode (421) and the second electrode (422) switch from the disconnected state to the conductive state. The detection circuit is electrically connected to the first electrode (421) and the second electrode (422) respectively, and is adapted to determine whether the liquid storage structure (10) has overflowed based on the state changes of the first electrode (421) and the second electrode (422).

9. The liquid phase plasma sterilization system according to claim 7, characterized in that, The liquid-phase plasma sterilization system is suitable for providing disinfectant water to cleaning equipment (50) with disinfection function, and the overflow device (40) further includes: The return pipe (43) has a discharge port (410) at the bottom of the overflow chamber (41). The return pipe (43) is located between the discharge port (410) and the washing chamber of the cleaning device (50). Water overflowing into the overflow chamber (41) can be discharged into the cleaning device (50) through the return pipe (43). The first switch (431) is installed on the return pipe (43) and is used to control the on / off state of the return pipe (43).

10. The liquid-phase plasma sterilization system according to claim 9, characterized in that, The overflow device (40) further includes a discharge pipe and a second switch. The discharge pipe is connected to the discharge port (410) to discharge water in the overflow chamber (41) to the outside. The second switch is used to control the opening and closing of the discharge pipe. And / or, a one-way valve (44) is provided at the overflow port (101), the one-way valve (44) being configured to allow liquid to flow unidirectionally from the inner cavity of the liquid storage structure (10) toward the overflow cavity (41).

11. A cleaning device, characterized in that, include: Washing chamber; The liquid phase plasma sterilization system according to any one of claims 6 to 10, wherein the disinfectant water prepared by the liquid phase plasma sterilization system is suitable for being introduced into the washing chamber for disinfection.

12. The cleaning equipment according to claim 11, characterized in that, The cleaning device (50) includes a dishwasher, which includes an inner tank having the washing chamber formed thereon.

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