Electric valve and dirt box thereof

Abstract

According to the embodiment of the invention, the electric valve and the dirt box thereof are provided, the electric valve with the soft rubber cover is provided, the soft rubber cover is used for protecting the electric valve from being damaged by sewage and silt, the soft rubber cover is in a pagoda folding shape, and the risk that sewage and garbage are hung on an electric rod assembly is reduced. The device specifically comprises a control motor, an electric rod assembly and a soft rubber cover used for preventing garbage from being wound. The driving end of the control motor is connected with the electric rod assembly, and the soft rubber cover used for reducing the risk that garbage suspends the electric rod assembly is arranged outside the electric rod assembly. The soft rubber cover is provided with at least two folds; when garbage exists in the dirt box, the control motor drives the electric rod assembly to move up and down, and the garbage slides along the folds so as to be prevented from winding the electric rod assembly. According to the sewage box, the technical effect that sealing and sewage discharging can be conducted in the sewage box through the electric valve is achieved.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to an electric valve and a dirt box thereof. Background Art

[0002] A floor sweeping robot is an intelligent household appliance that automatically completes the floor cleaning work in a room. Generally, it uses a brushing and vacuuming method to first suck the ground debris into its own trash collection box, thereby completing the function of floor cleaning. Generally speaking, robots that complete cleaning, dust suction, and mopping work are also uniformly classified as floor sweeping robots. The development direction of floor sweeping robots will be higher cleaning effects, higher cleaning efficiency, and larger cleaning areas brought by more advanced artificial intelligence.

[0003] With the increasing popularity of floor sweeping robots, users have higher and higher requirements for the effects of intelligence and deep cleaning. The floor sweeping robot is equipped with a dirt box, but the dirt box needs to store and discharge sewage, and the existing dirt box cannot simultaneously store water and effectively discharge sewage. Summary of the Utility Model

[0004] In view of the above problems, embodiments of the present utility model are proposed to provide an electric valve and a dirt box thereof that overcome the above problems or at least partially solve the above problems.

[0005] Embodiments of the present utility model disclose an electric valve, which is used for sealing and discharging sewage of a dirt box, and includes a control motor, an electric rod assembly, and a soft rubber cover for preventing garbage entanglement;

[0006] The driving end of the control motor is connected to the electric rod assembly, and the outer circle of the lower part of the electric rod assembly is provided with the soft rubber cover for reducing the risk of garbage hanging on the electric rod assembly; the soft rubber cover is provided with at least two folds;

[0007] When the electric rod assembly moves up and down, the garbage rotates along the folds, thereby preventing the garbage from entangling the electric rod assembly.

[0008] Preferably, the electric rod assembly includes a nut assembly for converting the rotational motion of the control motor into a linear motion, a motion rod, and a soft rubber plug;

[0009] The nut assembly is connected to the soft rubber plug through the motion rod; the soft rubber cover is sleeved on the outer circle of the motion rod.

[0010] Preferably, a low-position Hall switch assembly for detecting the position where the soft rubber plug moves to the sewage discharge port is provided at the upper part of the electric rod assembly;

[0011] The low-position Hall switch assembly includes a magnet and a low-position Hall switch, and the magnet is arranged inside the low-position Hall switch.

[0012] Preferably, the soft rubber plug is trapezoidal; at least one sealing ring is provided at the position where the soft rubber plug contacts the sewage outlet;

[0013] The soft rubber plug is made of an elastic material.

[0014] Preferably, a high-level Hall switch for detecting the water level is provided on one side of the electric rod assembly;

[0015] The bottom of the high-level Hall switch is higher than that of the low-level Hall switch.

[0016] Preferably, the nut assembly includes a screw rod and a nut;

[0017] One end of the screw rod is connected to the output end of the control motor, the other end of the screw rod is sleeved in the inner ring of the nut, and the outer ring of the nut is sleeved with the moving rod.

[0018] Preferably, a spring for overcoming the movement gap between the screw rod and the nut is sleeved on the outer ring of the middle part of the screw rod;

[0019] The nut is provided at the bottom of the spring.

[0020] Preferably, the moving rod and the soft rubber plug are connected by a buckle.

[0021] Preferably, the control motor is a high-speed motor.

[0022] To implement the present application, there is also provided a dirt box, which includes a dirt box body and the electric valve, and the electric valve is installed on the dirt box body.

[0023] The present application specifically includes the following advantages:

[0024] In the embodiments of the present application, compared with the prior art where "the sweeper is equipped with a dirt box, but the dirt box needs to store and discharge sewage, and the existing dirt box cannot simultaneously store water and effectively discharge sewage", the present application provides an electric valve with a soft rubber cover. The soft rubber cover is used to protect the electric valve from being damaged by dirt and sand, and the soft rubber cover is in a pagoda folding shape, reducing the risk of sewage and garbage hanging on the electric rod assembly. Specifically, it includes a control motor, an electric rod assembly, and a soft rubber cover for preventing garbage entanglement; the driving end of the control motor is connected to the electric rod assembly, and the soft rubber cover for reducing the risk of garbage hanging on the electric rod assembly is provided on the outer circle of the lower part of the electric rod assembly; the soft rubber cover is provided with at least two folds; when there is garbage in the dirt box, the control motor drives the electric rod assembly to move up and down, and the garbage rotates along the folds to prevent the garbage from entangling the electric rod assembly. The present application provides a soft rubber cover and a soft rubber plug, solving the problem that the existing dirt box cannot simultaneously store water and effectively discharge sewage, and achieving the technical effect of being able to seal and drain sewage in the dirt box through an electric valve. The present application can realize the fast, accurate, and reliable lifting of the electric valve for sealing and draining the dirt box, ensuring the reliability of the dirt box seal. At the same time, it increases the water flow speed of the drain plug, making the sewage discharge more thorough. When the electric rod assembly descends, it ensures that the soft rubber plug accurately falls into the sewage outlet of the dirt box, and the sealing force during sealing is more reliable; when the electric rod assembly ascends, the soft rubber plug rises more than 10 mm within 1 second, increasing the water flow speed of the drain plug and also enabling larger particulate matter to be discharged smoothly, making the sewage discharge and cleaning more thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the present application, the drawings required for the description of the present application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of an electric valve of the present utility model;

[0027] Figure 2 is a schematic structural diagram of an electric valve of the present utility model;

[0028] Figure 3 is a schematic structural diagram of the soft rubber plug seal of an electric valve of the present utility model;

[0029] Figure 4 is a schematic structural diagram of the soft rubber plug rising of an electric valve of the present utility model;

[0030] 1. Dirt box; 11. Drain port; 2. Electric valve; 21. Control motor; 22. Screw; 23. Nut; 24. Spring; 25. Moving rod; 26. Soft rubber plug; 27. Soft rubber cover; 28. Low-position Hall switch; 29. High-position Hall switch; 281. Magnet. Detailed implementation manners

[0031] To make the objectives, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0032] The utility model inventors found through analyzing the prior art that: there are more and more products such as floor washers that need to store and discharge sewage, but the sealing and sewage discharge of the sewage box are a contradictory problem. How to ensure the reliability of the soft rubber plug during use, and moreover, the reliability of repeated movement is a big problem; if an automatic sewage discharge function is required, the soft rubber plug must be electrically controlled to open, and the outflow speed of sewage and dirt also affects the sewage discharge effect.

[0033] In an embodiment of the present application, compared with the prior art where "the floor sweeper is internally provided with a dirt box 1, but the dirt box 1 needs to store and discharge sewage, and the existing dirt box 1 cannot simultaneously store water and effectively discharge sewage", the present application provides an electric valve 2 with a soft rubber cover 27. The soft rubber cover 27 is used to protect the electric valve 2 from being damaged by dirt and sediment, and the soft rubber cover 27 is in a pagoda folding shape to reduce the risk of sewage and garbage hanging on the electric rod assembly. Specifically, it includes a control motor 21, an electric rod assembly, and a soft rubber cover 27 for preventing garbage entanglement; the driving end of the control motor 21 is connected to the electric rod assembly, and the soft rubber cover 27 for reducing the risk of garbage hanging on the electric rod assembly is provided on the outer circle of the lower part of the electric rod assembly; the soft rubber cover 27 is provided with at least two folds; when there is garbage in the dirt box 1, the control motor 21 drives the electric rod assembly to move up and down, and the garbage rotates along the folds to prevent the garbage from entangling the electric rod assembly. The present application provides a soft rubber cover 27 and a soft rubber plug 26, which solves the problem that the existing dirt box 1 cannot simultaneously store water and effectively discharge sewage, and achieves the technical effect of being able to seal and discharge sewage through the electric valve 2 in the dirt box 1. The present application can realize the fast, accurate and reliable lifting of the electric valve 2 for sealing and discharging sewage of the dirt box 1, ensure the reliability of the seal of the dirt box 1, and at the same time increase the flow rate of the sewage plug, making the sewage discharge more thorough. When the electric rod assembly descends, it ensures that the soft rubber plug 26 accurately falls into the sewage outlet 11 of the dirt box 1, and the sealing force during sealing is more reliable; when the electric rod assembly ascends, the soft rubber plug 26 rises more than 10 mm within 1 second, increasing the flow rate of the sewage plug and also enabling larger particles to be discharged smoothly, making the sewage discharge and cleaning more thorough.

[0034] Referring to Figures 1-4 , an embodiment of the present application provides an electric valve 2 which specifically includes the following structure: it includes a control motor 21, an electric rod assembly, and a soft rubber cover 27 for preventing garbage entanglement; the driving end of the control motor 21 is connected to the electric rod assembly, and the soft rubber cover 27 for reducing the risk of garbage hanging on the electric rod assembly is provided on the outer circle of the lower part of the electric rod assembly; the soft rubber cover 27 is provided with at least two folds; when there is garbage in the dirt box 1, the control motor 21 drives the electric rod assembly to move up and down, and the garbage rotates along the folds to prevent the garbage from entangling the electric rod assembly.

[0035] In an embodiment of the present application, the driving end of the control motor 21 is connected to the electric rod assembly. The control motor 21 is a high-speed motor. The control motor 21 is arranged on the top of the dirt box 1, and the output end of the control motor 21 is connected to the screw rod 22.

[0036] As an example, the control motor 21 is electrically connected to both the lower Hall switch 28 and the upper Hall switch 29. The control motor 21 is used to control the up and down movement of the electric valve 2, which is the driving force source for the entire component. The high-speed motor is a 12V high-speed N20 motor, with a rated speed of 24,500 RPM and a no-load output speed of 700 RPM for the reduction gearbox of the high-speed motor.

[0037] In a specific embodiment, when the electric valve 2 rises, the speed should be fast enough, and when it descends, the sealing force should be reasonable; the control motor 21 is a 12V high-speed N20 motor, with a rated speed of 24,500 RPM and a no-load output speed of 700 RPM for the reduction gearbox; the screw rod 22 is an M6 standard screw rod 22 with a pitch of 1 mm; the plug rises more than 10 mm within 1 second.

[0038] In an embodiment of the present application, the electric rod assembly includes a nut assembly for converting the rotational motion of the control motor 21 into a linear motion, a motion rod 25, and a soft rubber plug 26; the nut assembly is connected to the soft rubber plug 26 through the motion rod 25; the soft rubber cover 27 is sleeved on the outer circle of the motion rod 25.

[0039] As an example, the electric rod assembly penetrates through the dirt box 1. One end of the electric rod assembly is connected to the control motor 21, and the other end of the electric rod assembly abuts against the sewage outlet 11 of the dirt box 1. The control motor 21 drives the electric rod assembly to move upward, thereby discharging and sealing the dirt box 1.

[0040] In an embodiment of the present application, the nut assembly includes a screw rod 22 and a nut 23; one end of the screw rod 22 is connected to the output end of the control motor 21, and the other end of the screw rod 22 is sleeved inside the inner circle of the nut 23, and the outer circle of the nut 23 is sleeved with the motion rod 25.

[0041] As an example, the screw rod 22 is provided with an external thread, the nut 23 is provided with an internal thread, and the internal thread and the external thread are adapted to each other. The outer circle of the nut 23 is fixedly connected to the motion rod 25, thereby converting the rotational movement of the screw rod 22 into the up and down linear movement of the motion rod 25. The nut 23 drives the motion rod 25 to move up and down.

[0042] In a specific embodiment, when the control motor 21 rotates forward, the nut 23 rotates around the screw rod 22, and the nut 23 rises, thereby driving the movement rod 25 to rise, and the movement rod 25 drives the soft rubber plug 26 to rise; when the control motor 21 rotates in reverse, the nut 23 rotates around the screw rod 22, and the nut 23 descends, thereby driving the movement rod 25 to descend, and the movement rod 25 drives the soft rubber plug 26 to descend. Or; when the control motor 21 rotates in reverse, the nut 23 rotates around the screw rod 22, and the nut 23 rises, thereby driving the movement rod 25 to rise, and the movement rod 25 drives the soft rubber plug 26 to rise; when the control motor 21 rotates forward, the nut 23 rotates around the screw rod 22, and the nut 23 descends, thereby driving the movement rod 25 to descend, and the movement rod 25 drives the soft rubber plug 26 to descend.

[0043] As an example, the movement rod 25 is connected to the nut gradually and the soft rubber plug 26 is combined together as an up-and-down sliding plug. When the control motor 21 rotates, the nut 23 is driven by the screw rod 22, and the rotational motion is changed into a linear motion.

[0044] In an embodiment of the present application, a spring 24 for overcoming the movement gap between the screw rod 22 and the nut 23 is sleeved on the outer circle of the middle part of the screw rod 22; the nut 23 is provided at the bottom of the spring 24. The spring 24 is made of metal, and the spring 24 is used to overcome the movement gap between the screw rod 22 and the nut 23, so that the soft rubber plug 26 can be more accurately inserted into the sewage outlet 11 of the sewage box 1.

[0045] In an embodiment of the present application, a soft rubber cover 27 for reducing the risk of garbage hanging on the electric rod assembly is provided on the outer circle of the lower part of the electric rod assembly; the soft rubber cover 27 has at least two folds; when there is garbage in the sewage box 1, the control motor 21 drives the electric rod assembly to move up and down, and the garbage rotates along the folds to prevent the garbage from winding around the electric rod assembly.

[0046] As an example, both the soft rubber plug 26 and the soft rubber cover 27 are made of 30-degree soft silicone; the soft rubber plug 26 is provided with at least one circle of raised sealing rings, and the sealing rings are used to seal the sewage outlet 11, and the soft rubber cover 27 is used to protect the electric valve 2 from being damaged by sewage and sediment. The soft rubber cover 27 is in a pagoda folding shape, reducing the risk of sewage and garbage hanging on the plug.

[0047] In a specific embodiment, the soft rubber cover 27 is formed into a pagoda folding shape by a plurality of folds, thereby reducing the winding of garbage around the movement rod 25 and the soft rubber plug 26. The folds can effectively prevent winding, and if there is winding, it can wind into the folds. The soft rubber cover 27 can be set into a shape with a thicker lower part than the upper part, or can be set into a shape with the same thickness up and down.

[0048] In an embodiment of the present application, the moving rod 25 and the soft rubber plug 26 are connected by a buckle. A buckle is provided at the bottom of the moving rod 25, and a space for accommodating the buckle is provided in the middle of the soft rubber plug 26, which can make the moving rod 25 and the soft rubber plug 26 closely connected.

[0049] In an embodiment of the present application, the soft rubber plug 26 is trapezoidal; at least one circle of sealing rings is provided at the position where the soft rubber plug 26 contacts the sewage discharge port 11; the soft rubber plug 26 is made of an elastic material.

[0050] As an example, the diameter of the bottom of the soft rubber plug 26 is smaller than that of the top, thus forming a trapezoid for better sealing. The soft rubber plug 26 is used to seal the sewage discharge port 11. When sewage discharge is required, the control motor 21 is controlled to raise the electric valve 2. The float is used to detect the fullness of sewage. The sealing ring is arranged in the middle of the outer circle of the soft rubber plug 26, which can make the soft rubber plug 26 and the sewage discharge port 11 in interference fit. One sealing ring can be provided, or two or three sealing rings can be provided. The soft rubber plug 26 can be made of rubber, silica gel or other elastic materials, and has good elasticity and durability. The design of the present application is easy to install and replace for regular cleaning and maintenance. In addition to preventing leakage and odor, the soft rubber plug 26 can also play a role in preventing insects and dust, further protecting the indoor environment.

[0051] In an embodiment of the present application, a low-position Hall switch 28 assembly for detecting the position where the soft rubber plug 26 moves to the sewage discharge port 11 is provided on the upper part of the electric rod assembly; the low-position Hall switch 28 assembly includes a magnet 281 and a low-position Hall switch 28, and the magnet 281 is arranged inside the low-position Hall switch 28.

[0052] In an embodiment of the present application, a high-position Hall switch 29 for detecting the water level is provided on one side of the electric rod assembly; the bottom of the high-position Hall switch 29 is higher than that of the low-position Hall switch 28.

[0053] As an example, the low-position Hall switch 28 and the magnet 281 are used to detect the position where the soft rubber plug 26 moves to the sewage discharge port 11; at this time, when the current of the control motor 21 reaches a preset value, it indicates that the soft rubber plug 26 has been sealed well. The high-position Hall switch 29 and the magnet 281 are used to detect the rising position, and then the control motor 21 is stopped.

[0054] It should be noted that a Hall switch is a sensor based on the Hall effect. It utilizes the Hall effect to detect the presence and intensity of a magnetic field. When a Hall element is exposed to a magnetic field, a voltage is generated between the two electrodes of the Hall element, and this voltage is called the Hall voltage. The magnitude of the Hall voltage is proportional to the magnitude of the magnetic field, so the magnitude of the magnetic field can be determined by measuring the Hall voltage. A Hall switch usually consists of a Hall element and an electronic circuit. When the magnetic field strength exceeds a certain preset value, the Hall element generates a Hall voltage, which is detected by the electronic circuit, thereby triggering the switch action. Hall switches can be used to detect the presence or movement of magnetic objects. For example, in this application, the Hall switch can be used to detect the position of the soft rubber plug 26.

[0055] The electric valve 2 of this application lies in that it can quickly and efficiently clean the dirt box 1, reducing the trouble and labor intensity of manual cleaning. At the same time, the electric valve 2 can also work in a timed or automatic control manner, improving the cleaning efficiency and hygiene level.

[0056] This application also includes a dirt box 1, and the electric valve 2 is provided in the dirt box 1, so as to better discharge sewage and seal.

[0057] In an embodiment of this application, the dirt box 1 includes an inclined surface, a vibration motor, an electric valve 2, and a sewage outlet 11; the inclined surface is arranged at the bottom of the dirt box 1, the vibration motor is arranged on the back of the inclined surface, the sewage outlet 11 is arranged at the bottom end of the inclined surface, and the electric valve 2 is arranged at the sewage outlet 11; when the dirt box 1 discharges sewage, the vibration motor vibrates the inclined surface, and the wet and dry mixed garbage adhered to the inclined surface vibrates to the sewage outlet 11, the electric valve 2 is lifted upward to expose the sewage outlet 11, and the wet and dry mixed garbage is discharged through the sewage outlet 11.

[0058] The soft rubber plug 26 is controlled to rise and fall by controlling the motor 21. When the soft rubber plug 26 enters the sewage outlet 11, the magnet 281 descends to the position of the low - level Hall switch 28. After the software detects that the soft rubber plug 26 is in place, it then judges the magnitude of the current of the control motor 21. When the calibrated force is reached, the motor is stopped. The motor current corresponding to the calibrated force can be measured through experiments, which is significantly greater than the force before the soft rubber plug 26 does not block the sewage outlet 11. When the float moves upward and reaches the position of the high - level Hall switch, it is judged that the dirt box 1 is full.

[0059] In an embodiment of the present application, an electric valve 2 for sealing and discharging sewage of a dirt box 1 is provided. The present application includes a control motor 21, a screw 22, a nut 23, a moving rod 25, a soft rubber plug 26, a soft rubber cover 27, a spring 24, and a Hall switch and a magnet 281 for detecting the position. The moving rod 25 is connected to the combination of the nut and the soft rubber plug 26 to form an up-and-down sliding plug. When the control motor 21 rotates, the nut 23 is driven by the screw 22, and the rotational motion is changed into a vertical motion. The present application can realize the fast, accurate and reliable lifting of the electric valve 2 for sealing and discharging sewage of the dirt box 1, ensure the reliability of the seal of the dirt box 1, and at the same time increase the water flow speed of the sewage plug, making the sewage discharge more thorough.

[0060] It should be noted that for method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the embodiments of the present invention are not limited by the described action sequence, because according to the embodiments of the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0061] There are repeated operation steps in this specific embodiment and the above specific embodiment. This specific embodiment only makes a simple description, and the rest of the solutions can be referred to the above specific embodiment for description.

[0062] Although the preferred embodiments of the embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0063] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or terminal device comprising the element.

[0064] The above has introduced in detail an electric valve 1 provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An electric valve, which is used for sealing and discharging sewage at the sewage outlet of the dirt box, and is characterized in that, It includes a control motor, an electric rod assembly, and a soft rubber cover made of silicone to prevent garbage entanglement. The driving end of the control motor is connected to the electric rod assembly. A soft rubber cover for reducing the risk of garbage hanging on the electric rod assembly is provided on the outer circle of the lower part of the electric rod assembly; the soft rubber cover is provided with at least two pleats. When the electric rod assembly moves up and down, the garbage slides along the pleats, thereby preventing the garbage from entangling the electric rod assembly.

2. The electric valve according to claim 1, characterized in that, The electric rod assembly includes a screw rod for converting the rotational motion of the control motor into a linear motion, a motion rod, and a soft rubber plug. The screw rod is connected to the soft rubber plug through the motion rod; the soft rubber cover is sleeved on the outer circle of the motion rod.

3. The electric valve according to claim 2, wherein A nut is embedded at one end of the motion rod. The other end of the motion rod is connected to the soft rubber plug.

4. The electric valve according to claim 3, characterized in that The soft rubber plug is trapezoidal; at least one circle of sealing rings is provided at the position where the soft rubber plug contacts the sewage outlet. The soft rubber plug is made of an elastic material.

5. The electric valve according to claim 2, characterized in that, A low-position Hall switch assembly for detecting the position where the soft rubber plug moves to the sewage outlet is provided on the upper part of the electric rod assembly. The low-position Hall switch assembly includes a magnet and a low-position Hall switch, and the magnet is arranged inside the low-position Hall switch.

6. The electric valve according to claim 5, characterized in that, A high-position Hall switch for detecting the water level is provided on one side of the electric rod assembly. The bottom of the high-position Hall switch is higher than that of the low-position Hall switch.

7. The electric valve according to claim 2, wherein A spring for overcoming the movement gap between the screw rod and the nut is sleeved outside the screw rod. The nut is provided at the bottom of the spring.

8. The electric valve according to claim 2, characterized in that, The motion rod and the soft rubber plug are connected by a buckle.

9. The electric valve according to claim 1, wherein The control motor is a high-speed motor.

10. A dirt box, characterized in that, The dirt box includes a dirt box body and an electric valve as described in any one of claims 1 to 9, and the electric valve is installed on the dirt box body.

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