Electromagnetic valve

Abstract

The utility model provides an electromagnetic valve which relates to the technical field of washing machines and comprises a lower shell, an upper shell, a rubber core, an iron core assembly, a driver, a spring, a coil, an iron plate and a magnetic conductive core, the rubber core is arranged on a water sealing opening of the lower shell, the iron core assembly is located at the rear end of the lower shell, and an inverted buckle is arranged at the upper end of the iron core assembly and connected with the driver through a connecting hole. The spring is arranged at the rear end of the driver, the rubber core seals the water sealing opening under the elastic force of the spring in the initial state, accurate control of the electromagnetic valve in different working states is achieved, when water enters, the iron core assembly drives the driver to move through the magnetic force generated by electrification of the coil, and the guide rib is matched with the tooth-shaped structure. A certain gap can be kept between the water sealing opening and the rubber core under the power-off condition, normal water outlet is ensured, the problem that the continuous working time of the water inlet valve is long due to low water pressure is effectively solved, and therefore energy consumption is reduced, and the service life of a coil is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of washing machines, in particular to a solenoid valve. Background Technique

[0002] In modern society, people's living standards have been continuously rising, and washing machines have become an indispensable household appliance product in family life. Its appearance has completely revolutionized the way people handle laundry, liberating people from the traditional, physically exhausting and time-consuming manual laundry labor, greatly beautifying people's living environment, and enabling people to always maintain a clean, tidy and hygienic image. From a macro social perspective, the wide popularization of washing machines has strongly promoted social progress, enabling people to allocate more energy and time to other important fields such as work and entertainment, and promoting the development of social productivity and the overall improvement of living quality.

[0003] The normal operation of a washing machine depends on a key component, the water inlet valve, whose main function is to accurately control the water inlet process of the washing machine to meet the water volume requirements of different washing programs.

[0004] However, since washing machines are sold and used globally, facing an extremely complex and diverse market environment, there are significant differences in water pressure conditions in different regions. There is a close relationship between the flow characteristics of the water inlet valve and the water pressure. When the water pressure is at a low level, in order to achieve the set water inflow, the water inlet valve has to extend its continuous working time. This long-term continuous working will cause a series of serious problems. On the one hand, the energy consumption will increase sharply, which does not conform to the development trend of modern energy-saving household appliances and increases the user's usage cost. On the other hand, the long-term power-on operation will make the coil of the water inlet valve operate at a high temperature and high load for a long time, which has a serious negative impact on key performance indicators such as the insulation performance and electromagnetic performance of the coil, greatly shortening the service life of the coil, and thus reducing the reliability and durability of the entire water inlet valve and even the washing machine.

[0005] Therefore, we propose a solenoid valve. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the disadvantages existing in the prior art. Washing machines are sold globally, there are large differences in market water pressure, the flow of the water inlet valve is related to the water pressure. When the water pressure is low, the water inlet valve needs to extend its working time to reach the water inflow, which causes a sharp increase in energy consumption, does not conform to the energy-saving trend and increases the usage cost, and also makes the coil operate at a high temperature and high load, damaging the insulation and electromagnetic performance, shortening the service life, and reducing the reliability and durability of the equipment.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A solenoid valve, comprising a lower housing, an upper housing, a rubber core, an iron core assembly, a driver, a spring, a coil, an iron plate and a magnetic core. The rubber core is placed on the water sealing port of the lower housing, and the iron core assembly is located at the rear end of the lower housing. An inverted buckle is provided at the upper end of the iron core assembly and is connected to the driver through a connection hole. A spring is arranged at the rear end of the driver. In the initial state, the elastic force of the spring seals the water sealing port with the rubber core.

[0009] When the coil is energized, it generates an electromagnetic force and forms a magnetic circuit with the iron plate. The magnetic core is used to enhance the magnetic force, and an O-ring is provided at the upper end of the magnetic core for sealing with the upper housing.

[0010] As a preferred solution of the present utility model, the upper housing is provided with a plurality of guiding ribs, the iron core assembly is provided with guiding grooves adapted to the guiding ribs, and the driver is also provided with guiding grooves corresponding to the guiding ribs. Through the cooperation of the guiding ribs with the first guiding groove and the second guiding groove, the movement of the iron core assembly and the driver is guided and limited, ensuring the accuracy and stability of their movement trajectories and preventing deviation or jamming during the movement process.

[0011] As a preferred solution of the present utility model, the iron core assembly and the driver are designed with a mutually matching tooth-shaped structure. The design of this tooth-shaped structure enables effective force transmission and movement state conversion between the iron core assembly and the driver during a specific movement stage, and under the action of different electromagnetic forces and spring elastic forces, the interaction of the tooth-shaped structure can control the falling-back position of the driver and the state of the rubber core relative to the water sealing port.

[0012] As a preferred solution of the present utility model, when the coil is energized instantaneously, the iron core assembly drives the driver to move upward along the direction defined by the guiding ribs and the first guiding groove and the second guiding groove under the action of the electromagnetic force. When the driver moves to the area where it breaks away from the guiding ribs, the coil is powered off. At this time, the driver moves along the tooth-shaped direction at the top of the guiding ribs under the action of the spring elastic force. After falling back a certain distance, the guiding ribs are engaged with the bottom of the tooth-shaped structure of the driver, causing the driver to stop falling back and remain in a specific position.

[0013] As a preferred solution of the present utility model, the inverted buckle structure of the iron core assembly plays a restraining role during the falling-back process of the driver, restricting the falling-back stroke of the iron core assembly, so that the falling-back distance of the iron core assembly is less than its initial upward lifting distance. Thus, in the power-off state of the solenoid valve, a specific gap is formed between the water sealing port and the rubber core, ensuring normal water discharge under a certain water pressure condition, and the size of this gap can be precisely adjusted by designing parameters such as the inverted buckle structure and the spring elastic force.

[0014] As a preferred solution of the present utility model, when it is necessary to close the solenoid valve after the water inlet ends, the solenoid valve is instantaneously energized, and the iron core assembly is driven by the electromagnetic force again to drive the driver to move upward;

[0015] When the top of the tooth-shaped structure of the actuator moves to align with the top of the guiding rib, the coil is powered off, and the actuator moves along the direction of the tooth shape at the top of the guiding rib under the action of the spring force. During this process, the guiding rib and the guiding groove of the actuator cooperate with each other to guide the movement of the actuator, enabling the rubber core to accurately return to the initial state of sealing the water inlet, achieving reliable closing of the solenoid valve and effectively preventing water leakage.

[0016] As a preferred solution of the present utility model, the connection part between the lower housing and the upper housing is sealed with a sealing rubber ring, effectively preventing liquid or gas from leaking through the housing connection gap, ensuring the overall sealing performance and working reliability of the solenoid valve.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] In the present utility model, through the ingenious design and coordinated operation of components such as the iron core assembly, actuator, spring, coil, and guiding rib, precise control of the solenoid valve in different working states is achieved. When water enters, the magnetic force generated by the energized coil is used to drive the actuator by the iron core assembly. Combining the cooperation between the guiding rib and the tooth-shaped structure, a certain gap can be maintained between the water inlet and the rubber core without electricity, ensuring normal water outlet, effectively solving the problem of long continuous working time of the inlet valve due to low water pressure, thereby reducing energy consumption and extending the coil life. Secondly, when it is necessary to close the solenoid valve after the water inlet ends, only a momentary power-on is required. Similarly, with the interaction of various components, the rubber core can accurately return to the initial sealing state, achieving reliable closing of the solenoid valve, improving the working stability and reliability of the solenoid valve, and further enhancing the overall performance and operating efficiency of the washing machine, providing a better user experience for users, and reducing the maintenance cost and energy consumption of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 is a schematic diagram of the main structure of a solenoid valve provided by the present utility model;

[0020] Figure 2 FIG. 2 is a schematic cross-sectional structure diagram of the main body of a solenoid valve provided by the present utility model;

[0021] Figure 3 FIG. 3 is a schematic diagram of the guiding rib of a solenoid valve provided by the present utility model;

[0022] Figure 4 FIG. 4 is a schematic diagram of the first guiding groove of a solenoid valve provided by the present utility model.

[0023] Legend: 1. Lower shell; 101. Water sealing port; 2. Upper shell; 21. Guide rib; 3. Rubber core; 4. Iron core assembly; 401. Undercut; 402. First guide groove; 6. Spring; 7. Coil; 8. Transmission; 81. Connecting hole; 82. Second guide groove; 9. O-ring; 10. Magnetic core; 11. Iron plate; 12. Tooth structure. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant literature, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0028] Example

[0029] like Figures 1-4 As shown, the utility model provides a technical solution: a solenoid valve, comprising a lower shell 1, an upper shell 2, a rubber core 3, an iron core assembly 4, a transmission 8, a spring 6, a coil 7, an iron plate 11 and a magnetic core 10.

[0030] The lower housing 1 serves as a basic load-bearing component, providing an installation position and structural support for other components. The rubber core 3 is precisely placed on the water sealing port 101 of the lower housing 1. The rubber material itself has excellent elastic deformation ability and good sealing performance.

[0031] When not initially disturbed by external forces, the rubber core 3 tightly adheres to the water sealing port 101 by virtue of its elasticity. Relying on the intermolecular forces of the rubber and its close contact with the surface of the water sealing port 101, a reliable sealing line is formed, effectively blocking the passage of liquid, ensuring that the solenoid valve is in a closed state under normal non-powered conditions, and preventing any possible leakage.

[0032] The iron core assembly 4 is stably located at the rear end of the lower housing 1. An inverted buckle 401 structure is ingeniously arranged at its upper end. The inverted buckle 401 establishes a stable and flexible connection link with the actuator 8 through the connection hole 81. The subtlety of this connection method lies in that when the iron core assembly 4 is subjected to external forces, it can effectively transmit the force to the actuator 8 through the connection structure, thereby driving the actuator 8 to perform corresponding actions.

[0033] A spring 6 is arranged at the rear end of the actuator 8. The spring 6 is crucial in the operation mechanism of the entire solenoid valve. In the initial state, the spring 6 exerts an appropriate pressure on the rubber core 3 by virtue of its elastic restoring force, enabling the rubber core 3 to tightly seal the water sealing port 101. The magnitude of this pressure is precisely designed and adjusted to ensure that it is sufficient to maintain the sealing effect and prevent liquid leakage, while not being too large to affect the normal opening action of the subsequent solenoid valve.

[0034] The coil 7 is one of the core components that generate power for the solenoid valve. When an electric current passes through the coil 7, according to the principle of electromagnetic induction, a magnetic field will be rapidly generated around the coil 7. This magnetic field interacts with the iron plate 11, and the two jointly form a complete magnetic circuit. In this magnetic circuit, a strong magnetic force will be generated, and this magnetic force can exert an attractive effect on the iron core assembly 4, thus providing a key driving force for the opening action of the solenoid valve.

[0035] The presence of the magnetic core 10 further optimizes the magnetic performance of the solenoid valve. The magnetic core 10 is usually made of a material with high magnetic permeability. It can effectively concentrate and guide the magnetic field, making the distribution of the magnetic field more concentrated and the intensity significantly enhanced. An O-ring 9 is installed at the upper end of the magnetic core 10. The O-ring 9 is made of a soft and elastic rubber material. Its main function is to form a tight sealing interface at the connection between the magnetic core 10 and the upper housing 2. When there is liquid or gas inside the solenoid valve, the O-ring 9 can fill any tiny gaps by virtue of its elastic deformation, preventing liquid or gas from leaking out through the gap between the magnetic core 10 and the upper housing 2, thereby comprehensively ensuring the internal sealing of the solenoid valve and laying a solid foundation for the stable and reliable operation of the solenoid valve.

[0036] The upper housing 2 is specifically provided with a plurality of guide ribs 21, which are evenly distributed inside the upper housing 2. Their shapes, sizes, and spacings are precisely calculated and designed. Corresponding guide grooves that are precisely adapted to the guide ribs 21 are provided on the iron core assembly 4. The contour of the guide grooves perfectly matches the outer shape of the guide ribs 21, and the fit tolerance between the two is extremely small, ensuring the accuracy and stability of the iron core assembly 4 during movement. Similarly, guide grooves corresponding to the guide ribs 21 are also provided on the actuator 8, and their working principle is similar to that of the guide grooves on the iron core assembly 4.

[0037] When the solenoid valve starts to work, the iron core assembly 4 and the actuator 8 move under the action of various forces. The guide ribs 21 serve as fixed tracks, providing the only movement path for the iron core assembly 4 and the actuator 8, restricting them to translate or lift only along a specific direction.

[0038] The guide grooves are nested on the guide ribs 21, so that the iron core assembly 4 and the actuator 8 will not have any lateral or longitudinal offsets during movement. This precise guiding and limiting mechanism can effectively avoid movement deviations caused by external factor interference or internal force imbalance, ensuring that every action of the solenoid valve can be accurately executed according to the preset trajectory, greatly improving the reliability and repeatability of the solenoid valve's actions, enabling the solenoid valve to operate stably under various complex working conditions and not malfunction due to component jamming or movement out of control.

[0039] The iron core assembly 4 and the actuator 8 are innovatively designed with mutually matching tooth-shaped structures 12. During a specific movement stage, such as when the solenoid valve is opening, when the coil 7 is energized to generate an electromagnetic force and the iron core assembly 4 is attracted upward and starts to move upward, at this time, the tooth-shaped structures 12 on the iron core assembly 4 and the actuator 8 are tightly engaged together. Due to the special design of the tooth shape, the electromagnetic force received by the iron core assembly 4 can be efficiently transmitted to the actuator 8, transmitting the power smoothly and accurately, thereby driving the actuator 8 to move upward together, achieving a seamless conversion of the movement state from the iron core assembly 4 to the actuator 8.

[0040] During the subsequent falling process, as the electromagnetic force disappears, the elastic force of the spring 6 begins to dominate the movement of the actuator 8. At this time, the tooth-shaped structure 12 plays a key role again. Under the interaction of different electromagnetic forces and the elastic force of the spring 6, parameters such as the shape, angle, and tooth spacing of the tooth-shaped structure 12 determine the resistance magnitude and movement trajectory of the actuator 8 during its fall.

[0041] When the transmission device 8 falls back under the elastic force of the spring 6, the interaction of the toothed structure 12 can accurately control the falling position of the transmission device 8. For example, when the transmission device 8 falls back a certain distance, a specific engagement relationship will be formed between the toothed structure 12 and the guide rib 21. This engagement is not accidental, but is determined by the design of the toothed structure 12. It can make the transmission device 8 stop falling back stably and remain in a specific position, thereby indirectly controlling the state of the rubber core 3 relative to the water sealing port 101.

[0042] If the tooth-shaped structure 12 is designed reasonably, the gap between the rubber core 3 and the water sealing port 101 can be accurately adjusted under different working conditions, such as different water pressure environments, to achieve precise control of the water flow, whether to maintain a sealed state to prevent water from passing through, or to form an appropriate gap to allow water to pass smoothly under a certain pressure.

[0043] When the coil 7 is energized, current quickly flows into the coil 7. According to the law of electromagnetic induction, a strong magnetic field is instantly generated around the coil 7. This magnetic field interacts with the iron plate 11 to form a magnetic circuit. The magnetic force generated in the magnetic circuit acts on the iron core assembly 4.

[0044] Since the magnitude of the electromagnetic force at this time far exceeds the elastic force of the spring 6, the core assembly 4 begins to overcome the elastic force of the spring 6 and move upward under the strong attraction of the electromagnetic force. During the movement, the core assembly 4 is tightly connected to the connecting hole 81 of the transmission 8 through the undercut 401 structure at its upper end. This connection method enables the core assembly 4 to effectively transmit the upward movement force to the transmission 8. At the same time, due to the precise fit between the guide ribs 21 of the upper shell 2 and the guide grooves of the core assembly 4 and the guide grooves of the transmission 8, the core assembly 4 and the transmission 8 can only make a straight line movement upward along the direction specified by the guide ribs 21, and the movement trajectory is accurate and stable.

[0045] When the actuator 8 moves to the area where it disengages from the guiding rib 21 driven by the iron core assembly 4, this is a crucial movement node. At this time, the pre-set control circuit will immediately cut off the current supply to the coil 7, causing the electromagnetic force to disappear instantly. After losing the support of the electromagnetic force, the actuator 8 begins to fall back under the action of the elastic force of the spring 6. Due to the previous movement trajectory and the special tooth-shaped structure 12 at the top of the guiding rib 21 of the upper housing 2, the actuator 8 will move along the tooth-shaped direction at the top of the guiding rib 21 during the falling-back process. After falling back a certain distance, the bottom of the tooth-shaped structure 12 of the actuator 8 will form a precise engagement with the guiding rib 21. This engagement is determined by the shape, size of the tooth-shaped structure 12 and the positional relationship of the guiding rib 21. Once the engagement is successful, the actuator 8 will stop falling back and stably maintain at this specific position. The determination of this position is crucial for the working state of the entire solenoid valve. It will directly affect the gap size between the subsequent water sealing port 101 and the rubber core 3, thus determining the water flow through situation of the solenoid valve in the power-off state.

[0046] The reverse buckle 401 structure of the iron core assembly 4 plays a unique and crucial restraint role during the falling-back process of the actuator 8. The reverse buckle 401 structure is usually designed as a convex or hook-shaped structure with a certain shape and size. A tight connection relationship is established between it and the actuator 8 through the connection hole 81. When the actuator 8 begins to fall back under the action of the elastic force of the spring 6, due to the connection between the reverse buckle 401 structure and the actuator 8, the iron core assembly 4 will receive a downward pulling force. However, this pulling force cannot make the iron core assembly 4 fall back completely to the initial position because the design of the reverse buckle 401 structure cleverly limits the falling-back stroke of the iron core assembly 4.

[0047] Specifically, the shape, size of the reverse buckle 401 structure and its position on the iron core assembly 4 are all carefully designed and optimized. By adjusting these parameters, the falling-back distance of the iron core assembly 4 can be precisely controlled, making the falling-back distance of the iron core assembly 4 less than its initial upward lifting distance. In this way, a specific gap will be formed between the water sealing port 101 and the rubber core 3 in the power-off state of the solenoid valve. The existence of this gap is to meet the requirement of normal water discharge under a certain water pressure condition.

[0048] For example, in a low water pressure environment, water flow can smoothly enter the interior of the solenoid valve through this gap under the action of water pressure, without causing difficulties in water intake or inability to intake water due to the complete sealing of the water sealing port 101. Moreover, through the meticulous design and precise adjustment of parameters such as the geometric shape of the reverse buckle 401 structure (such as the angle, length, width, etc. of the reverse buckle 401) and the elastic force of the spring 6 (such as the wire diameter, number of turns, material elastic modulus, etc. of the spring 6), precise control of the gap size between the water sealing port 101 and the rubber core 3 can be achieved, so as to adapt to different water pressure and flow requirements and ensure that the solenoid valve can work stably and efficiently under various working conditions.

[0049] When it is necessary to close the solenoid valve after the water intake is completed, the entire system will start the closing program. First, the solenoid valve is instantaneously powered on, and the current flows into the coil 7 again. A magnetic field is quickly generated around the coil 7 and forms a magnetic circuit with the iron plate 11, and the iron core assembly 4 is driven again by a strong electromagnetic force.

[0050] Since the iron core assembly 4 and the actuator 8 are tightly connected through the reverse buckle 401 structure and the connection hole 81, the iron core assembly 4 will drive the actuator 8 to move upward under the action of the electromagnetic force. This upward movement process is similar to part of the movement process when the solenoid valve is opened before, but the purpose is different. This time, it is to break the stable state formed by the engagement of the actuator 8 and the guiding rib 21 before.

[0051] When the actuator 8 moves upward driven by the iron core assembly 4 and the top of its tooth-shaped structure 12 moves to align with the top of the guiding rib 21, the control circuit will cut off the current supply to the coil 7 again, and the electromagnetic force disappears. At this time, the actuator 8 starts to move along the tooth-shaped direction at the top of the guiding rib 21 under the action of the elastic force of the spring 6. In this process, the cooperation between the guiding rib 21 and the guiding groove of the actuator 8 plays a crucial guiding role.

[0052] The guiding rib 21 serves as the track of the movement, providing an accurate movement direction for the actuator 8, while the guiding groove of the actuator 8 ensures that the actuator 8 can closely fit the guiding rib 21 during the movement process without deviation or shaking.

[0053] Under the coordinated guidance of the guiding rib 21 and the guiding groove, the actuator 8 can move precisely, enabling the rubber core 3 to accurately return to the state of initially sealing the water sealing port 101. This precise return process can effectively prevent water leakage caused by inaccurate positioning of the rubber core 3, ensure reliable closing of the solenoid valve, and thus guarantee the normal operation and safety of the entire system.

[0054] The connection part between the lower housing 1 and the upper housing 2 is sealed with a sealing rubber ring, which is a simple and efficient sealing method. The sealing rubber ring is usually made of rubber materials with high elasticity, wear resistance, corrosion resistance and good sealing performance, such as nitrile rubber, fluororubber, etc. During the assembly process of the solenoid valve, the sealing rubber ring is placed at the connection gap between the lower housing 1 and the upper housing 2. When the upper and lower housings 1 are fastened together by bolts or other connection methods, the sealing rubber ring will be squeezed and undergo elastic deformation.

[0055] Due to the good elasticity of the sealing rubber ring, it can fill any tiny irregular gaps in the connection gap between the upper and lower housings 1, whether the gaps are caused by insufficient machining accuracy or by the deformation of the housing after long-term use. The sealing rubber ring can effectively fill these gaps.

[0056] This filling effect forms a continuous and tight sealing barrier, preventing liquid or gas from leaking out through the housing connection gap.

[0057] At the same time, the wear resistance and corrosion resistance of the sealing rubber ring ensure that it can maintain a good sealing effect during long-term use. Even when the solenoid valve faces various harsh working environments (such as humidity, acid-base corrosion, etc.), the sealing rubber ring can still work stably and reliably, thus comprehensively ensuring the overall sealing performance and working reliability of the solenoid valve, extending the service life of the solenoid valve, and reducing the probability of failures caused by leakage.

[0058] In summary, the overall process of the solenoid valve is described as follows:

[0059] Initial state: When the solenoid valve is not powered on, the spring 6 forces the rubber core 3 to tightly seal the water inlet 101. At this time, the solenoid valve is in a fully closed state, preventing any liquid from passing through.

[0060] Water inlet process: First, power on and start. When water inlet is required, current is passed into the coil 7. The coil 7 generates a magnetic field to form a magnetic circuit with the iron plate 11. The iron core assembly 4 starts to move upward under the action of electromagnetic force, overcoming the elastic force of the spring 6. Since the iron core assembly 4 and the actuator 8 are connected by a reverse buckle 401 structure and a connection hole 81, and under the cooperation of the guide rib 21 and the guide groove, the iron core assembly 4 drives the actuator 8 to move linearly upward along the direction of the guide rib 21.

[0061] When the power is turned off and the actuator 8 moves to the area away from the guide rib 21, the coil 7 is powered off and the electromagnetic force disappears. Under the elastic force of the spring 6, the actuator 8 falls back along the toothed direction of the top of the guide rib 21. After falling back a certain distance, the bottom of the toothed structure 12 of the actuator 8 engages with the guide rib 21, stops falling back and remains at a specific position. At the same time, the core assembly 4 is restrained by the undercut 401 structure, and the falling distance is less than the rising distance, so that a specific gap is formed between the water sealing port 101 and the rubber core 3. The water flows into the solenoid valve through the gap under the action of the water pressure, and the water inlet is normal.

[0062] During the closing process, the power is turned on again. After the water inflow is completed, the system instantly energizes the solenoid valve, and the coil 7 generates a magnetic field again, so that the core assembly 4 is driven by the electromagnetic force to drive the actuator 8 to move upward, breaking the previous engagement state.

[0063] When the power is turned off and closed, when the top of the toothed structure 12 of the transmission device 8 moves to align with the top of the guide rib 21, the coil 7 is de-energized, and the transmission device 8 moves along the toothed direction of the top of the guide rib 21 under the elastic force of the spring 6. Under the guidance of the guide rib 21 and the guide groove, the rubber core 3 accurately returns to the initial sealing state of the water sealing port 101, and the solenoid valve is reliably closed to prevent water leakage.

[0064] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A solenoid valve, characterized in that: It includes a lower housing (1), an upper housing (2), a rubber core (3), an iron core assembly (4), a transmission (8), a spring (6), a coil (7), an iron plate (11) and a magnetic core (10). The rubber core (3) is placed on the water sealing port (101) of the lower housing (1). The iron core assembly (4) is located at the rear end of the lower housing (1). An inverted buckle (401) is provided at the upper end of the iron core assembly (4), and it is connected to the transmission (8) through a connection hole (81). A spring (6) is arranged at the rear end of the transmission (8). In the initial state, the elastic force of the spring (6) seals the water sealing port (101) with the rubber core (3). When the coil (7) is energized, it generates an electromagnetic force and forms a magnetic circuit with the iron plate (11). The magnetic core (10) is used to enhance the magnetic force, and an O-ring (9) is provided at the upper end of the magnetic core (10) for sealing with the upper housing (2).

2. The solenoid valve according to claim 1, characterized in that: The upper housing (2) is provided with a plurality of guide ribs (21). The iron core assembly (4) is provided with guide grooves adapted to the guide ribs (21), and the transmission (8) is also provided with guide grooves corresponding to the guide ribs (21). Through the cooperation of the guide ribs (21) with the first guide groove (402) and the second guide groove (82), the movement of the iron core assembly (4) and the transmission (8) is guided and limited, ensuring the accuracy and stability of their movement trajectories and preventing deviation or jamming during the movement process.

3. The solenoid valve according to claim 2, wherein: The iron core assembly (4) and the transmission (8) are designed with a mutually matching tooth-shaped structure (12). The design of this tooth-shaped structure (12) enables effective force transmission and movement state conversion between the iron core assembly (4) and the transmission (8) at a specific movement stage. And under the action of different electromagnetic forces and the elastic force of the spring (6), the interaction of the tooth-shaped structure (12) can control the falling-back position of the transmission (8) and the state of the rubber core (3) relative to the water sealing port (101).

4. An electromagnetic valve according to claim 3, characterized in that: When the coil (7) is energized instantaneously, the iron core assembly (4) drives the transmission (8) to move upward along the direction defined by the guide ribs (21), the first guide groove (402) and the second guide groove (82) under the action of the electromagnetic force, overcoming the elastic force of the spring (6). When the transmission (8) moves to the area where it breaks away from the guide ribs (21), the coil (7) is powered off. At this time, the transmission (8) moves along the tooth-shaped direction at the top of the guide ribs (21) under the action of the elastic force of the spring (6). After falling back a certain distance, the guide ribs (21) engage with the bottom of the tooth-shaped structure (12) of the transmission (8), causing the transmission (8) to stop falling back and remain in a specific position.

5. The solenoid valve according to claim 1, characterized in that: The inverted buckle (401) structure of the iron core assembly (4) plays a restraining role during the falling-back process of the transmission (8), restricting the falling-back stroke of the iron core assembly (4), so that the falling-back distance of the iron core assembly (4) is less than its initial upward lifting distance. Thus, in the state where the solenoid valve is de-energized, a specific gap is formed between the water sealing port (101) and the rubber core (3), ensuring normal water discharge under a certain water pressure condition, and the size of this gap can be precisely adjusted by designing parameters such as the inverted buckle (401) structure and the elastic force of the spring (6).

6. The solenoid valve according to claim 5, wherein: When it is necessary to close the solenoid valve after the water inlet ends, the solenoid valve is instantaneously powered on, and the iron core assembly (4) is driven again by the electromagnetic force to drive the actuator (8) to move upward; When the top of the tooth-shaped structure (12) of the actuator (8) moves to align with the top of the guide rib (21), the coil (7) is powered off, and the actuator (8) moves along the tooth-shaped direction at the top of the guide rib (21) under the elastic force of the spring (6). During this process, the guide rib (21) cooperates with the guide groove of the actuator (8) to guide the movement of the actuator (8), so that the rubber core (3) accurately returns to the initial state of sealing the water inlet (101), realizing the reliable closing of the solenoid valve and effectively preventing water leakage.

7. A solenoid valve according to any one of claims 1-6, characterized in that: The connection part between the lower housing (1) and the upper housing (2) is sealed with a sealing rubber ring, effectively preventing liquid or gas from leaking from the housing connection gap, and ensuring the overall sealing performance and working reliability of the solenoid valve.

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