A method for self-cleaning of a drain valve

Abstract

The application discloses a self-cleaning method of a drain valve, the drain valve comprising a valve body, a valve core rotatably arranged in the valve body, and a valve sleeve covering the valve core, the valve core being provided with a liquid passing opening and a drain passage communicated with the liquid passing opening, the lower end of the drain passage being connected with a drain nozzle, the drain valve further comprising a water inlet passage, the water inlet passage being arranged independently of the valve core, one end of the water inlet passage being directed to the valve core, and the other end of the water inlet passage being provided with a water pump, the valve core being provided with a detection member, and the valve body being provided with a sensing element for sensing the detection member, the method comprising the following steps: detecting the motion position of the valve core; and according to the motion position of the valve core, controlling water to flow into the water inlet passage to flush the valve core and / or the valve sleeve. According to the application, the valve core and the valve sleeve can be flushed, water is controlled (such as water inlet time, water inlet rate, water inlet amount and the like) according to the detected motion position of the valve core, and the flushing effect of the drain valve can be improved.

Description

Technical Field

[0001] This invention relates to the field of drain valve cleaning technology, and specifically to a self-cleaning method for drain valves. Background Technology

[0002] Most existing food processing machines use rotary valves for their drain valves. A rotary valve consists of a valve body, a valve core, a valve sleeve located between the valve body and the valve core, and a motor that drives the valve core to rotate. The valve sleeve provides a sealing function. To enable cleaning of the rotary valve, the valve sleeve has a water inlet, and the valve core has a water inlet channel for the water inlet. On the one hand, this structural design requires increasing the size of the valve core, which reduces the stability of the valve core structure. On the other hand, when cleaning the rotary valve, only the inside of the valve core can be cleaned, and the outside of the valve core / inside of the valve sleeve cannot be cleaned. Dirt remains on the outside of the valve core / inside the valve sleeve. If it is not cleaned in time, long-term use will result in problems such as odor and blockage, which seriously affects the user experience.

[0003] Chinese patent CN202120539731.9 discloses a drain valve for a food processing machine. The drain valve has a first inlet and a second inlet respectively connected to the pulping chamber and the supply system. It also has a single drain outlet, through which water or gas from the supply system can impact and clean the liquid passage within the drain valve. In this type of drain valve, the valve sleeve and valve body are relatively fixed, while the valve core moves relative to the valve sleeve. When the valve core moves to the point where the inlet and inlet channel are misaligned, the valve core surface blocks the inlet, preventing rinsing of the valve core's surface. Furthermore, the surface of the valve core used to block the drain outlet of the processing chamber is immersed in slurry for extended periods. Slurry residue easily adheres to and remains on the sealing surface, especially at the edge of the sealing surface and the drain outlet, and at the periphery of the drain outlet. Long-term use can lead to odors or blockages, affecting the user experience. Moreover, the current structure still cannot solve the problem of rinsing the outer surface of the valve core, nor can it clean the downstream discharge nozzle of the drain valve. In addition, such multi-channel valve cores often require testing of multiple functional positions such as open position, closed position, water inlet position, and flushing position, which places high demands on valve core movement, high manufacturing requirements, high cost, and low reliability issues.

[0004] Furthermore, existing technologies lack cleaning controls to address different cleaning needs for drain valves and cannot provide cleaning methods for the improved drain valves. Summary of the Invention

[0005] In order to solve one or more technical problems in the prior art, or at least provide a beneficial alternative, the present invention provides a self-cleaning method for a drain valve to optimize the cleaning control of different components and positions of the drain valve.

[0006] This invention discloses a self-cleaning method for a drain valve. The drain valve includes a valve body, a valve core rotatably disposed within the valve body, and a valve sleeve covering the valve core. The valve core has a liquid inlet and a drain channel communicating with the liquid inlet. The lower end of the drain channel is connected to a drain nozzle. The drain valve also includes a water inlet channel, which is set independently of the valve core. One end of the water inlet channel faces the valve core, and the other end is provided with a water pump. The valve core has a detection element, and the valve body has a sensing element that senses the detection element. The method includes the following steps: detecting the movement position of the valve core; and controlling the water to flow into the water inlet channel to flush the valve core and / or the valve sleeve based on the movement position of the valve core.

[0007] The self-cleaning method for the drain valve of the present invention also has the following additional technical features:

[0008] The detection element is a magnet, and the sensing element is a Hall element. When a Hall signal is detected, the water pump is controlled to operate to introduce water into the water inlet channel to flush the valve sleeve or the drain channel. When no Hall signal is detected, the water pump is controlled to stop operating to stop introducing water into the water inlet channel.

[0009] Determine whether the number of cleaning cycles meets the preset requirements. If it does not meet the preset requirements, control the valve core to rotate cyclically to repeat the flushing steps of the valve sleeve or the drain channel.

[0010] The water inlet channel is disposed on the valve sleeve, and the valve sleeve has a communication port for docking and communicating with the processing chamber. One end of the water inlet channel is normally connected to the communication port. When the valve core is detected to be in the closed position, the water pump is controlled to work to introduce water into the water inlet channel to flush the communication port or the outer surface of the valve core. When the valve core is detected to move to the waste discharge position, the water pump is controlled to stop working to stop the water from entering the water inlet channel.

[0011] Determine whether the number of cleaning cycles meets the preset requirements. If the preset requirements are not met, control the valve core to rotate cyclically to repeat the rinsing steps of the communication port or the outer surface of the valve core.

[0012] The valve core can be positioned in several ways: a closed position, where water is introduced into the inlet channel to flush the outer surface of the valve core for a first predetermined time or a first predetermined amount of water when the valve core is detected to be in the closed position; an open position, where water is introduced into the inlet channel to flush the drain channel and the drain nozzle for a second predetermined time or a second predetermined amount of water when the valve core is detected to be in the open position; and a semi-open position, where water is introduced into the inlet channel to flush the outer surface of the valve core, the inner surface of the valve sleeve, the drain channel, and the drain nozzle for a third predetermined time or a third predetermined amount of water when the valve core is detected to be in the semi-open position.

[0013] When the liquid inlet is detected to be partially open, the water inlet channel is controlled to receive water at a first rate so that some cleaning water enters the drain channel; the valve core is controlled to rotate to block the liquid inlet, and the valve core is controlled to rotate continuously so that the cleaning water stored in the drain channel dynamically flushes the inner surface of the valve sleeve facing the liquid inlet.

[0014] When it is detected that the liquid outlet is partially open and the liquid outlet is facing the water inlet channel, the water inlet channel is controlled to enter water at a second rate to shorten the time for the cleaning water to reach the drain nozzle and to rinse the drain nozzle.

[0015] When the valve core is detected to be in the waste discharge position, water is introduced into the water inlet channel; every time the valve core is controlled to rotate one revolution, it is determined whether the number of cleaning cycles meets the preset requirements. If the preset requirements are met, the water supply to the water inlet channel is stopped, and the valve core is controlled to stop rotating.

[0016] When the valve core is detected to be in the waste discharge position, water is introduced into the water inlet channel; the valve core is controlled to rotate by a preset angle and reach the closed position, the valve core is locked, and the drain valve is heated for a preset time, wherein the preset angle is less than 360 degrees; every time the valve core is controlled to rotate one revolution, it is determined whether the number of cleaning cycles meets the preset requirements. If the preset requirements are met, water is stopped from being introduced into the water inlet channel, and the valve core is controlled to stop rotating.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects:

[0018] 1. The self-cleaning method for drain valve of this application can flush the valve core and valve sleeve. According to the detected movement position of the valve core, the water inlet (such as water inlet time, water inlet rate, water inlet volume, etc.) can be controlled to flush different components (such as valve core or valve sleeve) and different positions, which can meet the various cleaning needs of drain valve and improve the cleaning effect of drain valve.

[0019] 2. As a preferred embodiment, when a Hall signal is detected, the water pump is controlled to operate to introduce water into the inlet channel to flush the valve sleeve or the drain channel; when no Hall signal is detected, the water pump is controlled to stop operating to stop introducing water into the inlet channel. In this method, specific locations on the valve sleeve or drain channel can be flushed for targeted flushing, improving the overall cleaning effect. Specifically, for specific locations on the valve sleeve or drain channel, the water pump can be started and stopped based on the Hall signal to improve the precision control of the cleaning process.

[0020] In a preferred embodiment of this method, the method further includes determining whether the number of cleaning cycles meets a preset requirement. If the preset requirement is not met, the valve core is controlled to rotate cyclically to repeat the flushing steps of the valve sleeve or the drain channel. In this embodiment, the valve sleeve or drain channel can be flushed multiple times according to user needs to improve the flushing effect of specific locations.

[0021] 3. In a preferred embodiment, the water inlet channel is disposed on the valve sleeve, and the valve sleeve has a communication port for docking and communicating with the processing chamber. One end of the water inlet channel is normally connected to the communication port. When the valve core is detected to be in the closed position, the water pump is controlled to operate to introduce water into the water inlet channel to rinse the communication port or the outer surface of the valve core. When the valve core is detected to have moved to the waste discharge position, the water pump is controlled to stop operating to stop introducing water into the water inlet channel. In this mode, specific positions of the communication port or the outer surface of the valve core can be rinsed for targeted rinsing, which can improve the layout cleaning effect. Specifically, for specific positions of the communication port or the outer surface of the valve core, the water pump can be started and stopped according to the valve core's movement to the corresponding functional position to improve the precision control of cleaning.

[0022] In a preferred embodiment of this method, the method further includes determining whether the number of cleaning cycles meets a preset requirement. If the preset requirement is not met, the valve core is controlled to rotate cyclically to repeat the rinsing steps of the connecting port or the outer surface of the valve core. In this embodiment, the connecting port or the outer surface of the valve core can be rinsed multiple times according to user needs to improve the rinsing effect of specific locations.

[0023] 4. In a preferred embodiment, the movement position of the valve core includes a closed position. When the valve core is detected to be in the closed position, water is introduced into the water inlet channel to rinse the outer surface of the valve core and rinse for a first predetermined time or a first predetermined amount of water. In this manner, by rinsing the outer surface of the valve core for a predetermined time or a predetermined amount of water, the local rinsing force can be enhanced to effectively remove attached and residual slurry stains.

[0024] The valve core's movement position includes an open position. When the valve core is detected to be in the open position, water is introduced into the water inlet channel to flush the drain channel and the drain nozzle, and flushing is performed for a second predetermined time or a second predetermined amount of water. Since the drain channel and drain nozzle are used for slurry discharge for a long time, slurry stains are easily left behind. By flushing the drain channel and drain nozzle for a predetermined time or a predetermined amount of water, the flushing force can be strengthened to effectively remove the attached and residual slurry stains.

[0025] The movement position of the valve core includes a semi-open position where the liquid outlet is partially open. When the valve core is detected to be in the semi-open position, water is introduced into the water inlet channel to flush the outer surface of the valve core, the inner surface of the valve sleeve, the liquid outlet channel and the liquid outlet, and flush for a third predetermined time or a third predetermined amount of water. By controlling the valve core to be in the semi-open position, multiple positions can be flushed, which helps to improve the flushing efficiency.

[0026] 5. In a preferred embodiment, when the opening of the liquid inlet is detected, the water inlet channel is controlled to receive water at a first rate, so that some cleaning water enters the drain channel; the valve core is controlled to rotate to block the liquid inlet, and the valve core is controlled to rotate continuously so that the cleaning water stored in the drain channel dynamically flushes the inner surface of the valve sleeve facing the liquid inlet; for the part of the inner surface of the valve sleeve that cannot be flushed by the water inlet channel, the cleaning water stored in the drain channel can be used to clean this part of the inner surface of the valve sleeve during the rotation of the valve core, thereby optimizing the cleaning effect of the valve sleeve.

[0027] 6. In a preferred embodiment, when it is detected that the liquid outlet is partially open and the liquid outlet is facing the water inlet channel, the water inlet channel is controlled to receive water at a second rate to shorten the time for the cleaning water to reach the drain nozzle and rinse the drain nozzle; by controlling the opening angle of the liquid outlet and the water inlet rate, the rate loss of the cleaning water when passing through the drain channel is minimized as much as possible, so that the cleaning water still has a suitable rate when it reaches the drain nozzle, so as to achieve rapid and powerful rinsing of the drain nozzle.

[0028] 7. In a preferred embodiment, when the valve core is detected to be in the waste discharge position, water is introduced into the water inlet channel; each time the valve core is controlled to rotate one revolution, it is determined whether the number of cleaning cycles meets the preset requirements. If the preset requirements are met, water is stopped from being introduced into the water inlet channel, and the valve core is controlled to stop rotating; in this way, by making the valve core rotate cyclically, real-time flushing of each position can be achieved, optimizing the overall cleaning effect of the drain valve.

[0029] 8. In a preferred embodiment, when the valve core is detected to be in the waste discharge position, water is introduced into the water inlet channel; the valve core is controlled to rotate by a preset angle and reach the closed position, the valve core is locked, and the drain valve is heated for a preset time, wherein the preset angle is less than 360 degrees; each time the valve core is controlled to rotate one revolution, it is determined whether the number of cleaning cycles meets the preset requirements. If the preset requirements are met, water is stopped from being introduced into the water inlet channel, and the valve core is controlled to stop rotating; during the valve core's cyclic rotation cleaning process, a step of heating the drain valve can be added to provide high-temperature sterilization effect and further improve the cleaning effect. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of a food processing machine according to one embodiment of this application.

[0032] Figure 2 for Figure 1 A top view of a food processing machine.

[0033] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point A in the middle.

[0034] Figure 4 This is a schematic diagram illustrating the flushing process control of a valve sleeve or drain channel at a specific location according to one embodiment of this application.

[0035] Figure 5 In response to Figure 4 A flowchart illustrating the process of rinsing at a specific location.

[0036] Figure 6 This is a schematic diagram illustrating the flushing process control of a specific location connection port or the outer surface of a valve core under one embodiment of this application.

[0037] Figure 7 In response to Figure 6 A flowchart illustrating the process of rinsing at a specific location.

[0038] Figure 8 This is a schematic diagram of the valve core cyclic rotation flushing process according to one embodiment of this application.

[0039] Figure 9 In response to Figure 8 A schematic diagram of the process flow for the cyclic rinsing.

[0040] Figure 10 This is a schematic diagram of the valve core circulating rotation flushing and sterilization process according to one embodiment of this application.

[0041] Figure 11 In response to Figure 10 A schematic diagram of the process flow for the cyclic rinsing.

[0042] Figure label:

[0043] 10-Grinding component, 11-Processing chamber, 111-Drain outlet;

[0044] 20-Drain valve, 21-Valve body, 22-Valve core, 23-Valve sleeve, 221-Liquid outlet, 222-Drain channel, 24-Drain nozzle, 25-Water inlet channel. Detailed Implementation

[0045] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0046] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0047] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0048] Furthermore, in the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two connected entities do not establish a connection relationship through a transitional structure, but are connected solely by a connecting structure to form a whole. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0051] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] like Figures 1 to 3 As shown, this application provides a food processing machine, including a crushing assembly 10 and a drain valve 20. The crushing assembly 10 includes a processing chamber 11, which has a drain port 111. The drain valve 20 is installed at the drain port 111 to control the opening and closing of the drain port 111. The drain valve 20 includes a valve body 21, a valve core 22 rotatably disposed within the valve body 21, and a valve sleeve 23 covering the valve core 22. The valve core 22 has a liquid outlet 221 and a drain channel 222 communicating with the liquid outlet 221. The lower end of the drain channel 222 is connected to a drain nozzle 24. Further, to achieve cleaning of the drain valve 20, the drain valve 20 also includes a water inlet channel 25. The water inlet channel 25 is set independently of the valve core 22, and one end of the water inlet channel 25 faces the valve core 22 to provide cleaning water to the valve core 22, thereby rinsing at least one of the valve core 22 and the valve sleeve 23.

[0053] Preferably, the water inlet channel 25 is disposed on the valve sleeve 23, the water inlet end of the water inlet channel 25 extends out of the valve body 21, and the water outlet end of the water inlet channel 25 is connected to the drain port 111, so that the cleaning water can enter the inside of the valve sleeve 23 through the water inlet channel 25.

[0054] Addressing the limitation that existing drain valve cleaning methods only clean the inner surface of the valve core, this application, by incorporating a water inlet channel 25, enables cleaning of the inner and outer surfaces of the valve core 22, the inner surface of the valve sleeve 23, and the drain nozzle 24. Cleaning water entering through the water inlet channel 25 flows towards the valve core 22 through the clearance opening of the valve sleeve 23, thereby rinsing the exposed outer surface of the valve core 22 and the inner surface of the valve sleeve 23. Alternatively, it enters the drain channel 222 through the liquid outlet 221 of the valve core 22, rinsing the drain channel 222 and the drain nozzle 24 below it. The exposed outer surface of the valve core 22 refers to the outer surface of the valve core 22 corresponding to the area of ​​the drain outlet 111, and the exposed inner surface of the valve sleeve 23 refers to the portion of the inner surface of the valve sleeve 23 that is not obstructed by the valve core 22 as it rotates. It should be noted that the clearance between the valve core 22 and the valve sleeve 23 only allows the valve core 22 to rotate relative to the valve sleeve 23, and the cleaning water does not directly enter between the valve core 22 and the valve sleeve 23.

[0055] Specifically, the inlet end of the water inlet channel 25 can be connected to an external water supply device, such as a water tank, to supply water to the water inlet channel 25 for cleaning the drain valve 20. Preferably, the inlet end of the water inlet channel 25 is equipped with a one-way valve, which allows unidirectional flow from the water supply device to the water inlet channel 25 to prevent wastewater from flowing back into the water supply device after cleaning. Preferably, a power component, such as a water pump, is provided between the water inlet channel 25 and the water supply device to provide pumping power and control the timing of water intake. During the cleaning process of the drain valve 20, the state of the valve core 22 is unaffected; that is, the valve core 22 can remain stationary or rotate (continuous rotation, intermittent rotation, etc.). The valve core 22 can be kept static or dynamic depending on the location / area to be cleaned and the amount of cleaning required.

[0056] Preferably, the valve core 22 is provided with a detection element, and the valve body 21 is provided with a sensing element that senses the detection element. The movement position of the valve core 22 is detected by the cooperation of the sensing element and the detection element. The detection element is, for example, a magnet, and the sensing element is, for example, a Hall element.

[0057] like Figures 4 to 11 As shown, this application provides a self-cleaning method for a drain valve, comprising:

[0058] Detect the movement position of the valve core;

[0059] Based on the movement position of the valve core, water is controlled to enter the water inlet channel to flush the valve core and / or the valve sleeve.

[0060] Specifically, the purpose of detecting the movement position of the valve core is to move the valve core to a specific position so as to flush specific locations (such as the valve core and / or valve sleeve) according to user needs. Detecting the movement position of the valve core also aims to control the timing of water intake or cessation in the inlet channel, ensuring that the cleaning water entering through the inlet channel can effectively flush the desired locations, thereby improving water resource utilization.

[0061] It should be noted that although the water inlet channel is set independently of the valve core, whether the valve core rotates or not, or to what position it rotates, does not affect the water inlet channel. However, this application uses the movement position of the valve core as a means to control the water inlet channel. This can achieve the cleaning effect expected by the user while ensuring cleaning efficiency and maximizing the utilization of cleaning water, and realize the precise cleaning control of the drain valve, rather than just simple random rinsing.

[0062] The cleaning water entering through the inlet channel in this application can rinse the valve core (both the outer and inner surfaces of the valve core, i.e., the drainage channel), the inner surface of the valve sleeve, and the drainage nozzle. Preferably, the inlet channel can be located on the valve sleeve, which has a connecting port for connecting with the processing chamber, and one end of the inlet channel is normally open to the connecting port. In this manner, the cleaning water can also rinse the connecting port (during the slurry discharge process, the slurry enters the valve core from the processing chamber through the connecting port, and long-term slurry discharge may cause slurry residue to remain at the connecting port). The cleanliness levels of the above-mentioned locations vary. For locations with more severe slurry residue, or locations that are difficult to clean normally, these are the focus of user attention, and users may want to focus on cleaning these locations.

[0063] As a preferred embodiment of this application, the self-cleaning method for the drain valve may include the following steps:

[0064] When a Hall signal is detected, the water pump is controlled to operate to introduce water into the water inlet channel to flush the valve sleeve or the drain channel;

[0065] When no Hall signal is detected, the water pump is controlled to stop working, thereby stopping water from entering the water inlet channel.

[0066] Specifically, the Hall element has a certain detection range. During valve core rotation, when a detection element on the valve core, such as a magnet, enters the detection range of the Hall element, a Hall signal can be detected. When the magnet leaves the detection range, no Hall signal can be detected. Based on this, this application can utilize the detection range of the Hall element to correspond to the movement position of the valve core, thereby controlling the precise timing of water inlet and achieving effective flushing of specific locations.

[0067] like Figure 4As shown, assuming the valve core rotates counterclockwise, when it reaches position a, a Hall signal can be detected. At this point, the valve core's liquid passage is only partially open. When cleaning water enters the inlet channel, it can enter the inside of the valve core through the open liquid passage. Since the portion of the valve sleeve's inner surface corresponding to the liquid passage is exposed, the cleaning water can flush this part of the valve sleeve's inner surface. Furthermore, because the cleaning water can enter the inside of the valve core, it can also flush the valve core's drain channel. As the valve core continues to rotate, from position a to position b, the liquid passage is fully open, and the cleaning water can continuously flush the drain channel. As the valve core continues to rotate, from position b to position c, the liquid passage is partially open, and the cleaning water can flush the exposed inner surface of the valve sleeve and the drain channel. The valve core continues to rotate. When it rotates from position c to position d, the liquid outlet just closes and the valve core magnet leaves the detection range of the Hall element, so the Hall signal cannot be detected. At this time, the water inlet channel is controlled to stop water intake to avoid wasting water resources when the desired flushing position cannot be achieved.

[0068] Rotating the valve core from position a to position d allows for a single flush of a specific location (valve sleeve and / or drainage channel). Since a single flush may not achieve the desired cleaning effect, multiple flushes can be performed. Combined with... Figure 5 When the valve core rotates from position a to position d and then back to position a, the water pump can be restarted to introduce cleaning water into the inlet channel. The valve core can cyclically rotate from position a to position d. During this process, the presence or absence of a Hall signal controls the water pump's operation, thereby controlling the water flow into or out of the inlet channel. After each flush (valve core rotating from position a to position d), it can be determined whether the number of flushes meets the preset requirement. If the expected number of flushes has not been reached, the above flushing process is repeated until the expected number of flushes is reached. After cleaning, the valve core can be rotated to the waste discharge position to drain the residual water in the drain valve, thus ending the drain valve cleaning process.

[0069] Understandably, in a multi-rinse system, after the valve core rotates from position a to position d, it can rotate in the opposite direction (clockwise) starting from position d again. When the inlet just opens, a Hall signal can be detected, allowing the water pump to operate and supply cleaning water to the inlet channel. Subsequently, the valve core rotates to position c, then to position b, and then back to position a. Throughout this process, a Hall signal can be detected, allowing continuous supply of cleaning water to the inlet channel to rinse the valve sleeve and / or the drain channel. When the valve core rotates from position a to the point where the inlet just closes, no Hall signal is detected, allowing the water pump to stop, thus stopping water supply to the inlet channel. Comparatively, alternating rotation of the valve core in opposite directions reduces the valve core's travel distance and improves the efficiency of multiple rinsing cycles.

[0070] As a preferred embodiment of this application, the self-cleaning method for the drain valve may include the following steps:

[0071] When the valve core is detected to be in the closed position, the water pump is controlled to operate to introduce water into the water inlet channel to flush the connecting port or the outer surface of the valve core;

[0072] When the valve core is detected to have moved to the waste discharge position, the water pump is controlled to stop working, so as to stop water from entering the water inlet channel.

[0073] like Figure 6 As shown, assume the valve core rotates counterclockwise. When the valve core is in the closed position, it blocks the drain port. At this time, introducing cleaning water into the inlet channel can flush the sealing surface. Simultaneously, the cleaning water also flushes the connecting port. As the valve core continues to rotate, from... Figure 6 When the valve core is rotated from the closed position (e) to the waste discharge position (f), the outer surface of the valve core cannot be exposed, allowing the water pump to stop and preventing water from entering the inlet channel. When the valve core is in position e, the sealing surface is immersed in slurry for a long time. Slurry stains easily adhere to and remain on the sealing surface and the area surrounding the drain outlet. Specific flushing of this particular area can optimize the cleaning effect of the drain valve.

[0074] Rotating the valve core from position e to position f completes one flush. Since a single flush may not achieve the desired cleaning effect, multiple flushes can be performed. (Combined...) Figure 7 The valve core can repeat the above flushing process. After each flushing is completed (the valve core rotates from position e to position f), it can be determined whether the number of flushing times meets the preset requirements. If the expected number of flushing times is not reached, the above flushing process is repeated until the expected number of flushing times is reached.

[0075] Understandably, in a multi-flush scheme, after the valve core rotates from position e to position f, it can continue to rotate counterclockwise back to position e, and then cycle in the same direction. Alternatively, after rotating from position e to position f, the valve core can rotate back to position e in the opposite direction (clockwise), meaning the valve core rotates alternately in opposite directions.

[0076] In a preferred embodiment of this application, the movement position of the valve core includes a closed position. When the valve core is detected to be in the closed position, water is introduced into the water inlet channel to rinse the outer surface of the valve core and rinse for a first predetermined time or a first predetermined amount of water. In this manner, by rinsing the outer surface of the valve core for a predetermined time or a predetermined amount of water, the local rinsing force can be enhanced to effectively remove attached and residual slurry stains.

[0077] The valve core's movement position includes an open position. When the valve core is detected to be in the open position, water is introduced into the water inlet channel to flush the drain channel and the drain nozzle, and flushing is performed for a second predetermined time or a second predetermined amount of water. Since the drain channel and drain nozzle are used for slurry discharge for a long time, slurry stains are easily left behind. By flushing the drain channel and drain nozzle for a predetermined time or a predetermined amount of water, the flushing force can be strengthened to effectively remove the attached and residual slurry stains.

[0078] The movement position of the valve core includes a semi-open position where the liquid outlet is partially open. When the valve core is detected to be in the semi-open position, water is introduced into the water inlet channel to flush the outer surface of the valve core, the inner surface of the valve sleeve, the liquid outlet channel and the liquid outlet, and flush for a third predetermined time or a third predetermined amount of water. By controlling the valve core to be in the semi-open position, multiple positions can be flushed, which helps to improve the flushing efficiency.

[0079] In this embodiment, when the valve core moves to a specific position (such as the closed position, the open position, or the semi-open position), the valve core remains stationary to perform flushing for a predetermined time or a predetermined amount of water.

[0080] As a preferred embodiment of this application, the self-cleaning method for the drain valve may include the following steps:

[0081] When the opening of the liquid outlet is detected, the water inlet channel is controlled to enter water at a first rate so that some of the cleaning water enters the drain channel.

[0082] The valve core is controlled to rotate to block the liquid passage, and the valve core is controlled to rotate continuously so that the cleaning water stored in the drain channel dynamically flushes the inner surface of the valve sleeve facing the liquid passage.

[0083] like Figure 4 As shown, when the liquid inlet is partially open, the cleaning water can easily rinse the exposed inner surface of the valve sleeve. However, when the liquid inlet is closed, a portion of the inner surface of the valve sleeve (according to the schematic diagram of this application, this portion is the inner surface of the valve sleeve in the upper semicircle) is difficult to rinse. To achieve cleaning of the entire inner surface of the valve sleeve, this application can utilize cleaning water stored in the drain channel, and then control the valve core to rotate rapidly to use this cleaning water to clean the inner surface of the valve sleeve in the upper semicircle.

[0084] To ensure a continuous supply of cleaning water in the drain channel, water is introduced into the inlet channel when the outlet is partially open. Furthermore, the water inlet rate is controlled according to the opening degree of the outlet, ensuring a higher initial rate as the outlet opening decreases. This delays the direct discharge of cleaning water from the drain channel and reduces the discharge volume (ensuring the initial rate exceeds the discharge rate). Once a suitable amount of cleaning water is present in the drain channel, the valve core is rapidly rotated to close the outlet, allowing the remaining cleaning water to clean the inner surface of the valve sleeve at the position the valve core has rotated through. During this cleaning process, the outlet end of the drain channel can be appropriately treated to further delay the discharge of cleaning water; for example, the pressure at the outlet end can be increased to ensure effective cleaning before discharge.

[0085] As a preferred embodiment of this application, the self-cleaning method for the drain valve may include the following steps:

[0086] When it is detected that the liquid outlet is partially open and the liquid outlet is facing the water inlet channel, the water inlet channel is controlled to enter water at a second rate to shorten the time for the cleaning water to reach the drain nozzle and to rinse the drain nozzle.

[0087] Specifically, the water inlet channel can be angled with the open drain outlet, and the water inlet rate can be controlled. This reduces the direct impact between the cleaning water and the inner wall of the drain channel after the cleaning water enters quickly, minimizing the rate loss of the cleaning water. This allows the cleaning water to quickly rinse the drain nozzle when it reaches it. Compared to the slow flow of cleaning water through the drain nozzle, this rapid rinsing has a certain impact force, which can remove residual slurry from the inner wall of the drain nozzle.

[0088] As a preferred embodiment of this application, the self-cleaning method for the drain valve may include the following steps:

[0089] When the valve core is detected to be in the waste discharge position, water is introduced into the water inlet channel;

[0090] Each time the valve core rotates one revolution, it is determined whether the number of cleaning cycles meets the preset requirements. If the preset requirements are met, water is stopped from entering the water inlet channel, and the valve core is stopped rotating.

[0091] like Figure 8 and Figure 9 As shown, the rinsing method of this application can be dynamic rinsing, meaning that as the valve core rotates, the cleaning water can rinse multiple areas of the valve core and valve sleeve in real time, optimizing the overall rinsing effect of the drain valve. One rotation of the valve core corresponds to a single rinsing. To enhance the rinsing effect, the valve core can be controlled to rotate cyclically for multiple rinsings. After rinsing, the valve core can be moved to the wastewater discharge position to drain the wastewater completely, and then the valve core can be controlled to move to the closed position to prevent forgetting to close the drain valve before pulping in the next use.

[0092] Understandably, water can be introduced into the inlet channel when the valve core is in the waste discharge position or at any other position, without affecting the dynamic continuous flushing of the valve core. Introducing water when the valve core is in the waste discharge position allows for direct water intake after slurry discharge, eliminating the need for valve core rotation, which aligns with user habits and enhances the user experience.

[0093] As a preferred embodiment of this application, the self-cleaning method for the drain valve may include the following steps:

[0094] When the valve core is detected to be in the waste discharge position, water is introduced into the water inlet channel;

[0095] Control the valve core to rotate at a preset angle and bring the valve core to the closed position, lock the valve core, and heat the drain valve for a preset time, wherein the preset angle is less than 360 degrees;

[0096] Each time the valve core rotates one revolution, it is determined whether the number of cleaning cycles meets the preset requirements. If the preset requirements are met, water is stopped from entering the water inlet channel, and the valve core is stopped rotating.

[0097] like Figure 10 and Figure 11 As shown, in the continuous rotation flushing scheme of the valve core, a step of heating the drain valve can be added to improve the cleaning effect of the drain valve by utilizing high-temperature sterilization. Specifically, during the process of the valve core rotating from the waste discharge position to the closed position, the surfaces of the valve core and valve sleeve are moistened to a certain extent. Subsequently, when the valve core reaches the closed position (stops water inflow), the drain valve is heated. Since the surfaces of the valve core and valve sleeve already have a certain amount of moisture, heating on this basis, when the temperature rises, the moisture on the surface of the valve core and valve sleeve can have a certain evaporation effect on the surface dirt, which can both accelerate the removal of dirt from the surface and sterilize it, thereby further optimizing the cleaning effect.

[0098] Understandably, the timing of heating the drain valve can be either when the valve core is in the closed position or at any position of the valve core.

[0099] The waste discharge position in this application refers to the position where the liquid outlet and the liquid discharge port of the processing chamber are fully connected. In this position, the liquid discharge nozzle is aligned with the slurry receiving cup. In order to discharge cleaning wastewater in a timely manner, the slurry receiving cup can be removed so that the liquid discharge nozzle is aligned with the residual water box. The slurry discharge position and the waste discharge position can refer to the same position. Therefore, the above-mentioned waste discharge position can also be described as the slurry discharge position, except that no slurry discharge operation is performed in this slurry discharge position.

[0100] The technical solutions protected by this invention are not limited to the above embodiments. It should be noted that any combination of the technical solutions of any embodiment with one or more other embodiments is within the protection scope of this invention. Although the invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this invention are within the scope of protection claimed by this invention.

Claims

1. A self-cleaning method for a drain valve, the drain valve comprising a valve body, a valve core rotatably arranged in the valve body, and a valve sleeve covering the valve core, the valve core being provided with a liquid passage and a drain passage in communication with the liquid passage, the lower end of the drain passage being connected to a drain nozzle, characterized in that, The drain valve also includes a water inlet channel, which is set independently of the valve core. One end of the water inlet channel faces the valve core, and a water pump is set at the other end. The valve core is provided with a detection element, and the valve body is provided with a sensing element that senses the detection element. The method includes the following steps: Detect the movement position of the valve core; When the valve core rotates to the state of blocking the liquid passage, the water outlet end of the inlet channel is flushed to the outer surface of the valve core; when the valve core rotates to the state of opening the liquid passage, the drain channel of the valve core is flushed; when the valve core rotates to the state of partially opening the liquid passage, the inner surfaces of the valve core and the valve sleeve are flushed. When the opening of the liquid outlet is detected, the water inlet channel is controlled to enter water at a first rate so that some of the cleaning water enters the drain channel. The valve core is controlled to rotate to block the liquid passage, and the valve core is controlled to rotate continuously so that the cleaning water stored in the drain channel dynamically flushes the inner surface of the valve sleeve facing the liquid passage.

2. The self-cleaning method for a drain valve according to claim 1, characterized in that, The detection element is a magnet, and the sensing element is a Hall element; When a Hall signal is detected, the water pump is controlled to operate to introduce water into the water inlet channel to flush the valve sleeve or the drain channel; When no Hall signal is detected, the water pump is controlled to stop working, thereby stopping water from entering the water inlet channel.

3. The self-cleaning method for a drain valve according to claim 2, characterized in that, Also includes: Determine whether the number of cleaning cycles meets the preset requirements. If it does not meet the preset requirements, control the valve core to rotate cyclically to repeat the flushing steps of the valve sleeve or the drain channel.

4. The self-cleaning method for a drain valve according to claim 1, characterized in that, The water inlet channel is disposed on the valve sleeve, and the valve sleeve is provided with a communication port for docking and communicating with the processing chamber. One end of the water inlet channel is normally connected to the communication port. When the valve core is detected to be in the closed position, the water pump is controlled to operate to introduce water into the water inlet channel to flush the connecting port or the outer surface of the valve core; When the valve core is detected to have moved to the waste discharge position, the water pump is controlled to stop working, so as to stop water from entering the water inlet channel.

5. The self-cleaning method for a drain valve according to claim 4, characterized in that, Also includes: Determine whether the number of cleaning cycles meets the preset requirements. If the preset requirements are not met, control the valve core to rotate cyclically to repeat the rinsing steps of the communication port or the outer surface of the valve core.

6. The self-cleaning method for a drain valve according to claim 1, characterized in that, The valve core's movement position includes a closed position. When the valve core is detected to be in the closed position, water is introduced into the water inlet channel to flush the outer surface of the valve core and flush for a first predetermined time or a first predetermined amount of water. The valve core's movement position includes an open position. When the valve core is detected to be in the open position, water is introduced into the water inlet channel to flush the drain channel and the drain nozzle, and flushing is performed for a second predetermined time or a second predetermined amount of water. The movement position of the valve core includes a semi-open position where the liquid outlet is partially open. When the valve core is detected to be in the semi-open position, water is introduced into the water inlet channel to flush the outer surface of the valve core, the inner surface of the valve sleeve, the liquid outlet channel and the liquid outlet, and flush for a third predetermined time or a third predetermined amount of water.

7. The self-cleaning method for a drain valve according to claim 1, characterized in that, When it is detected that the liquid outlet is partially open and the liquid outlet is facing the water inlet channel, the water inlet channel is controlled to enter water at a second rate to shorten the time for the cleaning water to reach the drain nozzle and to rinse the drain nozzle.

8. The self-cleaning method for a drain valve according to claim 1, characterized in that, When the valve core is detected to be in the waste discharge position, water is introduced into the water inlet channel; Each time the valve core rotates one revolution, it is determined whether the number of cleaning cycles meets the preset requirements. If the preset requirements are met, water is stopped from entering the water inlet channel, and the valve core is stopped rotating.

9. The self-cleaning method for a drain valve according to claim 1, characterized in that, When the valve core is detected to be in the waste discharge position, water is introduced into the water inlet channel; Control the valve core to rotate at a preset angle and bring the valve core to the closed position, lock the valve core, and heat the drain valve for a preset time, wherein the preset angle is less than 360 degrees; Each time the valve core rotates one revolution, it is determined whether the number of cleaning cycles meets the preset requirements. If the preset requirements are met, water is stopped from entering the water inlet channel, and the valve core is stopped rotating.

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