Solenoid valve assembly and electrical equipment

Abstract

The present application relates to the technical field of control switches, and provides a solenoid valve assembly and an electrical appliance. The solenoid valve assembly includes a valve core assembly and an electromagnetic drive assembly. The electromagnetic drive assembly includes an electromagnetic coil assembly, an iron core, an iron core support seat, and a permanent magnet. The iron core is adapted to sense the magnetic force of the electromagnetic coil assembly. The permanent magnet is disposed on one side of the iron core, and the valve core assembly is disposed on the other side of the iron core. The iron core support seat is connected to the iron core. One side of the iron core support seat abuts against the permanent magnet, and the contact area between the iron core support seat and the permanent magnet is larger than the surface area of the iron core facing the permanent magnet. The solenoid valve assembly provided by the present application can enable the magnetic force generated by the permanent magnet to act on the valve core assembly as much as possible, so as to reduce the magnetic leakage phenomenon, reduce the magnetic force loss of the permanent magnet, and improve the magnetic force utilization rate of the permanent magnet.

Description

Technical Field

[0001] The present application relates to the technical field of control switches, and in particular to a solenoid valve assembly and electrical equipment. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic automation components used to control fluids. They are actuators used in industrial control systems to adjust the direction, flow, speed and other parameters of fluid media.

[0003] The solenoid valve includes a valve core assembly and an electromagnetic drive assembly. When the solenoid valve is in working mode, the electromagnetic drive assembly needs to have good magnetic conductivity. However, in the related art, the electromagnetic drive assembly has magnetic leakage, which makes its magnetic force weaker. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application provides a solenoid valve assembly, which can make the magnetic force generated by the permanent magnet act on the valve core assembly as much as possible, so as to reduce magnetic leakage, reduce the magnetic force loss of the permanent magnet, and improve the magnetic force utilization rate of the permanent magnet.

[0005] The present application also provides an electrical device.

[0006] The solenoid valve assembly provided according to an embodiment of the present application includes:

[0007] Valve core assembly;

[0008] An electromagnetic drive assembly, the electromagnetic drive assembly comprising an electromagnetic coil assembly, an iron core, an iron core support seat and a permanent magnet, the iron core being suitable for inducing the magnetic force of the electromagnetic coil assembly, the permanent magnet being arranged on one side of the iron core, and the valve core assembly being arranged on the other side of the iron core; the iron core support seat being connected to the iron core, one side of the iron core support seat abutting against the permanent magnet, and a contact area between the iron core support seat and the permanent magnet being larger than a surface area of ​​the iron core facing the permanent magnet.

[0009] According to the solenoid valve assembly of the embodiment of the present application, an iron core support seat is arranged between the iron core and the permanent magnet, so that the iron core is connected to the permanent magnet through the iron core support seat, which is equivalent to increasing the contact area between the iron core and the permanent magnet, so that the connection between the iron core support seat and the permanent magnet is tighter, thereby reducing the air gap between the iron core support seat and the permanent magnet, reducing the magnetic resistance, and allowing the magnetic force generated by the permanent magnet to be used for the valve core assembly as much as possible, so as to reduce magnetic leakage, reduce the magnetic loss of the permanent magnet, improve the magnetic utilization rate of the permanent magnet, effectively prevent the magnetic force generated by the permanent magnet from escaping from the air gap, and weaken the magnetic force acting on the valve core assembly.

[0010] According to an embodiment of the present application, the electromagnetic coil assembly includes a coil body and a coil skeleton, and the coil skeleton is configured with a channel; a boss is provided on a side of the iron core support seat facing the iron core, the boss extends into the channel, and the iron core is fixedly connected to the boss.

[0011] According to an embodiment of the present application, at least one end of the channel is provided with a receiving groove, and a clamping portion is formed between the receiving groove and the channel;

[0012] The permanent magnet is located in the receiving groove, one side of the iron core support seat abuts against the permanent magnet, and the other side of the iron core support seat is restricted by the clamping portion.

[0013] According to an embodiment of the present application, a counterbore is provided on a side of the iron core support seat facing the permanent magnet, the iron core support seat and the iron core are connected by a fastener, and a part of the iron core is adapted to extend into the counterbore.

[0014] According to an embodiment of the present application, the iron core and the iron core support seat are integrally formed.

[0015] According to an embodiment of the present application, the electromagnetic drive assembly further includes a first seal, a sealing groove is formed between the iron core and the iron core support seat, and the first seal is embedded in the sealing groove.

[0016] According to an embodiment of the present application, a valve gasket is further included;

[0017] The valve core assembly includes a valve core body and an elastic member, the elastic member is located between the valve core body and the electromagnetic coil assembly, and the valve gasket is embedded at one end of the valve core body;

[0018] The valve core body is adapted to switch between a first stable state and a second stable state;

[0019] In the first stable state, the iron core is adsorbed to the permanent magnet through the iron core support seat, the valve core body is adsorbed to the iron core, and the elastic member is in an elastically deformed state;

[0020] In the second stable state, the elastic member is adapted to inhibit the valve core from approaching the permanent magnet.

[0021] According to an embodiment of the present application, a first housing, a second housing and an isolation tube are further included, the first housing and the second housing are assembled to form an accommodation cavity, and the electromagnetic drive assembly is located in the accommodation cavity;

[0022] The isolation tube is located within the electromagnetic coil assembly and is sealingly connected to the second housing. Both the iron core and the valve core body are located within the isolation tube, and the valve core body is adapted to move axially within the isolation tube along the axis of the isolation tube.

[0023] According to an embodiment of the present application, a limit seat is provided on the valve core body. One end of the elastic member abuts against the limit seat, and the other end of the elastic member abuts against the isolation tube.

[0024] The electrical equipment provided by the present application includes the solenoid valve assembly described in any one of the above.

[0025] In the electrical equipment according to the embodiment of the present application, by providing an iron core support seat between the iron core and the permanent magnet, the iron core is connected to the permanent magnet through the iron core support seat, which is equivalent to increasing the contact area between the iron core and the permanent magnet, so that the connection between the iron core support seat and the permanent magnet is tighter, thereby reducing the air gap between the iron core support seat and the permanent magnet, reducing the magnetic resistance, enabling as much of the magnetic force generated by the permanent magnet as possible to be used for the valve core assembly, reducing the magnetic leakage phenomenon, reducing the magnetic force loss of the permanent magnet, improving the magnetic force utilization rate of the permanent magnet, effectively preventing the magnetic force generated by the permanent magnet from escaping from the air gap, and weakening the magnetic force acting on the valve core assembly.

[0026] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. 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 also be obtained based on these drawings.

[0028] Figure 1 is a cross-sectional view of an embodiment of the solenoid valve assembly provided by an embodiment of the present application;

[0029] Figure 2 is a cross-sectional view of another embodiment of the solenoid valve assembly provided by an embodiment of the present application;

[0030] Figure 3 is a schematic structural view of the integral molding of the iron core and the iron core support seat in the solenoid valve assembly provided by an embodiment of the present application;

[0031] Figure 4 is a schematic magnetic circuit diagram of the solenoid valve assembly provided by an embodiment of the present application.

[0032] Reference Signs:

[0033] 10. Spool assembly; 11. Spool body; 111. Limit seat; 112. Embedded part; 113. Protrusion; 12. Elastic member;

[0034] 20. Electromagnetic drive assembly; 21. Coil body; 22. Coil bobbin; 221. Channel; 222. Accommodating groove; 223. Clamping part; 23. Iron core; 231. Depression; 24. Permanent magnet; 25. Iron core support seat; 251. Boss; 252. Counterbore; 26. First seal;

[0035] 30. Valve gasket; 31. Embedded groove; 40. First housing; 50. Second housing; 60. Isolation tube; 70. Sealing housing; 71. Second seal; 80. Fixing hole. Specific embodiments

[0036] The following further describes the embodiments of the present application in detail in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0037] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0039] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0040] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0041] The solenoid valve assembly provided by the present application is used for flow path switching or refrigerant on-off control, and can be applied to electrical appliances such as gas stove solenoid valves that require flow path switching or refrigerant on-off.

[0042] Taking the application of the solenoid valve in a gas stove as an example, in the related art, the gas stove solenoid valve includes a valve core assembly and an electromagnetic drive assembly. The gas stove solenoid valve can achieve bistable control through the cooperation of the valve core assembly and the electromagnetic drive assembly. That is, in the open valve state, the valve core body in the valve core assembly contacts the iron core in the electromagnetic drive assembly, and the valve core body is attracted by the magnetic field generated by the permanent magnet in the electromagnetic drive assembly. At this time, the coil body does not need to be continuously energized, and the energy consumption is relatively low. In the closed valve state, the valve core body drives the valve pad to close the valve port, and the elastic member in the valve core assembly can provide a pressing force for the valve core body. At this time, the coil body also does not need to be continuously energized.

[0043] In the working mode of maintaining a steady state, the gas stove solenoid valve requires the electromagnetic drive assembly to have good magnetic conductivity. In the related art, there is a magnetic leakage phenomenon in the electromagnetic drive assembly of the gas stove solenoid valve, which weakens its magnetic force. Therefore, the solenoid valve assembly of the present application is provided.

[0044] For a detailed reference Figure 1 , the solenoid valve assembly provided by the present application includes a valve core assembly 10 and an electromagnetic drive assembly 20. The electromagnetic drive assembly 20 is an actuator of the solenoid valve assembly and is used to drive the valve core assembly 10 to move.

[0045] The electromagnetic drive assembly 20 includes an electromagnetic coil assembly, an iron core 23, an iron core support seat 25, and a permanent magnet 24. The iron core 23 can sense the magnetic force of the electromagnetic coil assembly. One side of the iron core 23 is the permanent magnet 24, and the other side of the iron core 23 is the valve core assembly 10. The iron core support seat 25 is located between the iron core 23 and the permanent magnet 24. It is equivalent to connecting the iron core 23 and the iron core support seat 25. One side of the iron core support seat 25 abuts against the permanent magnet 24. The contact area between the iron core support seat 25 and the permanent magnet 24 is larger than the surface area of the iron core 23 facing the permanent magnet 24, making the connection between the permanent magnet 24 and the iron core 23 tighter.

[0046] Wherein, the cross-sectional areas of the iron core support seat 25 and the permanent magnet 24 can be equal, and the cross-sectional areas of the iron core support seat 25 and the permanent magnet 24 are both larger than the cross-sectional area of the iron core 23.

[0047] That is, by arranging the iron core support seat 25 between the iron core 23 and the permanent magnet 24, the iron core 23 is connected to the permanent magnet 24 through the iron core support seat 25 to increase the contact area between the iron core 23 and the permanent magnet 24, so that as much magnetic force generated by the permanent magnet 24 as possible is used for the valve core assembly 10, to reduce magnetic leakage, reduce the magnetic force loss of the permanent magnet, and effectively improve the magnetic force utilization rate of the permanent magnet.

[0048] It can be understood that for the solenoid valve assembly provided in this application, by arranging the iron core support seat 25 between the iron core 23 and the permanent magnet 24, the iron core 23 is connected to the permanent magnet 24 through the iron core support seat 25, which is equivalent to increasing the contact area between the iron core 23 and the permanent magnet 24, making the connection between the iron core support seat 25 and the permanent magnet 24 tighter, thereby reducing the air gap between the iron core support seat 25 and the permanent magnet 24, effectively preventing the magnetic force generated by the permanent magnet 24 from leaking from the air gap, weakening the magnetic force acting on the valve core assembly 10, and further making as much magnetic force generated by the permanent magnet 24 as possible be used for the valve core assembly 10, reducing magnetic leakage, reducing magnetic force loss, and effectively improving the magnetic force utilization rate of the permanent magnet 24.

[0049] In some embodiments of this application, as Figure 1 shown, the electromagnetic coil assembly includes a coil body 21 and a coil bobbin 22. The coil bobbin 22 can be a cylindrical structure, and a through hole is provided along the axis of the coil bobbin 22, that is, a channel 221 is constructed.

[0050] The material of the iron core support base 25 is the same as that of the iron core 23. A boss 251 is provided on the side of the iron core support base 25 facing the iron core 23. The boss 251 extends into the channel 221, and the iron core 23 is fixedly connected to the boss 251. This boss 251 is equivalent to providing a step on the iron core 23. On the one hand, it can adapt to the structure of the electromagnetic coil assembly, making the iron core support base 25 in close contact with the permanent magnet 24, thereby reducing the air gap between the permanent magnet 24 and the iron core support base 25, reducing the magnetic resistance, and enabling as much magnetic force as possible to be conducted to the iron core 23 to reduce the magnetic leakage phenomenon.

[0051] On the other hand, the iron core 23 is connected to the iron core support base 25 through fasteners. For example, the iron core 23 is fixed on the boss 251 of the iron core support base 25 by means of screw riveting. Compared with directly riveting the iron core 23 on the surface of the iron core support base 25, riveting the iron core 23 on the boss 251 can make the connection between the iron core 23 and the iron core support base 25 closer.

[0052] In some embodiments of the present application, as Figure 1 shown, receiving grooves 222 are provided at one end or both ends of the channel 221. The structural dimensions of the receiving grooves 222 can correspond to the structural dimensions of the permanent magnet 24, so that the permanent magnet 24 is embedded in the receiving grooves 222.

[0053] The coil bobbin 22 can be a stepped shaft, that is, a clamping portion 223 is formed between the receiving groove 222 and the channel 221. One side of the iron core support base 25 is in contact with the permanent magnet 24, and the other side of the iron core support base 25 is restricted by the clamping portion 223, so that the iron core support base 25 is completely clamped between the permanent magnet 24 and the clamping portion 223, which can maintain the position of the iron core support base 25, making the gap between the iron core support base 25 and the permanent magnet 24 not easy to change, thereby ensuring better structural stability, always being able to reduce the air gap between the iron core support base 25 and the permanent magnet 24, and preventing the magnetic force generated by the permanent magnet 24 from escaping from the air gap, weakening the magnetic force acting on the valve core assembly 10.

[0054] In some embodiments of the present application, as Figure 1 shown, a counterbore 252 can be provided on the side of the iron core support base 25 facing the permanent magnet 24, which is equivalent to a groove being opened inward on the end face of the iron core support base 25. When the iron core 23 is riveted to the iron core support base 25, the part of the iron core 23 extending into the iron core support base 25 can be located in the counterbore 252 to ensure the flatness of the iron core support base 25 and make the contact between the iron core support base 25 and the permanent magnet 24 close.

[0055] It can also be understood that it is convenient for the iron core 23 to be assembled on the iron core support seat 25. That is, when the iron core 23 is assembled on the iron core support seat 25, the counterbore 252 is equivalent to the error area of the iron core 23, that is, a part of the structure of the iron core 23 is allowed to extend out of the iron core support seat 25 and be located within the counterbore 252, but not exceed the surface of the iron core support seat 25. Thus, it can not only ensure the flatness of the contact surface between the iron core support seat 25 and the permanent magnet 24, ensure the close contact between the iron core support seat 25 and the permanent magnet 24, but also reduce the assembly precision requirements of the iron core 23 and improve the assembly efficiency.

[0056] In some embodiments of the present application, such as Figure 1 shown, the electromagnetic drive assembly 20 further includes a first seal 26. The iron core 23 and the iron core support seat 25 are combined to form a sealing groove, and the first seal 26 is embedded in the sealing groove. One end of the iron core 23 is equivalent to a stepped shaft, and the iron core support seat 25 is fixedly connected to the stepped shaft, and there is a gap between the iron core support seat 25 and the shaft shoulder of the stepped shaft, and this gap can accommodate the first seal 26.

[0057] The first seal 26 can play a sealing role to prevent fluid (gas or liquid) from entering the interior of the solenoid valve assembly from the solenoid valve assembly and leaking from the bottom of the solenoid valve assembly.

[0058] In some embodiments of the present application, such as Figure 2 and Figure 3 shown, in order to further improve the magnetic performance of the solenoid valve assembly and reduce the processing procedures at the same time, the iron core 23 and the iron core support seat 25 are integrally formed. It is equivalent to machining (milling) the iron core support seat 25 on the iron core 23 when machining the iron core 23, so that there is no air gap between the iron core 23 and the iron core support seat 25, and the side of the iron core support seat 25 facing the permanent magnet 24 is completely attached to the surface of the permanent magnet 24. Thus, the magnetic force generated by the permanent magnet 24 can be more concentratedly conducted from the iron core support seat 25 to the iron core 23, and then act on the valve core assembly 10, effectively avoiding part of the magnetic force generated by the permanent magnet 24 from escaping into the air and causing magnetic force loss of the permanent magnet 24.

[0059] That is, the iron core 23 and the iron core support seat 25 are integrally formed, and there is no air gap between them, which can reduce the magnetic resistance between them, make the magnetic force generated by the permanent magnet 24 act on the valve core assembly 10 as much as possible, avoid magnetic leakage, reduce magnetic force loss, and improve the magnetic force utilization efficiency.

[0060] In some embodiments of the present application, such as Figure 2 shown, the solenoid valve assembly provided by the present application further includes a valve gasket 30. The valve core assembly 10 includes a valve core body 11 and an elastic member 12. The elastic member 12 can be a spring and is arranged between the valve core body 11 and the electromagnetic coil assembly. The valve gasket 30 is sleeved on one end of the valve core body 11.

[0061] Among them, the material of the valve gasket 30 can be rubber, which is mainly used in cooperation with the valve cavity to close the valve port. One end of the valve gasket 30 facing the valve core body 11 is provided with an embedding groove 31 opening inward from the end face, and the embedding groove 31 is stepped. The valve core body 11 can be in a rod-like structure, and a stepped embedding portion 112 is provided at one end of the valve core body 11 facing the valve gasket 30. The valve core body 11 is matched with the embedding groove 31 of the valve gasket 30 through the embedding portion 112, which facilitates the installation and replacement of the valve gasket 30. When the valve core body 11 moves, the valve gasket 30 can move together with the valve core body 11.

[0062] In some embodiments, a clamping groove can also be provided on the outer side of the valve core body 11, and a clamping block matched with the clamping groove is provided on the inner wall of the valve gasket 30, so that the valve gasket 30 is clamped on the valve core body 11 and moves synchronously with the valve core body 11.

[0063] In addition to being clamped on the valve core body 11, the valve gasket 30 can also be in interference fit with the valve core body 11. When the valve core body 11 moves, the valve gasket 30 arranged on the valve core body 11 with interference fit can move together with the valve core body 11.

[0064] The valve gasket 30 can also include two retaining rings arranged on both sides of the valve gasket 30. The valve gasket 30 is sleeved on the valve core body 11 and is located between the two retaining rings. A retaining groove for restricting the axial movement of the retaining ring along the valve core body 11 is provided on the valve core body 11, and the retaining ring is clamped in the retaining groove, so that the valve gasket 30 is restricted between the two retaining rings.

[0065] In addition to the above fixing forms between the valve gasket 30 and the valve core body 11, the valve gasket 30 can also be connected to the valve core body 11 by a pin or a key. On the premise of ensuring the sealing performance, the valve gasket 30 is fixed on the valve core body 11 and can move together with the valve core body 11, so as to realize the closing and opening of the valve port.

[0066] Among them, the valve core body 11 can be switched between a first stable state and a second stable state.

[0067] In the first stable state of the valve core body 11, the iron core 23 is adsorbed by the permanent magnet 24 through the iron core support seat 25, the valve core body 11 is adsorbed by the iron core 23, and the elastic member 12 is in an elastically deformed state. It can be understood that the elastic member 12 is in a compressed state at this time and has the ability to recover from deformation.

[0068] In the second stable state of the valve core body 11, the elastic member 12 is adapted to inhibit the valve core body 11 from approaching the permanent magnet 24 and make a preset distance between the valve core body 11 and the iron core 23.

[0069] Among them, the above preset spacing can be an interval value of the distance. That is, within this interval value range, the valve core body 11 will not be adsorbed by the magnetic force of the permanent magnet 24, causing the valve core body 11 to approach the iron core 23 and keep in contact with the iron core 23, and the elastic member 12 completely recovers its deformation or has a certain amount of deformation.

[0070] The above preset spacing can also be a fixed value of the distance. That is, the elastic member 12 completely recovers its deformation and is used to support the valve core body 11, so that the valve core body 11 will not be adsorbed by the magnetic force of the permanent magnet 24, approach the iron core 23, and keep in contact with the iron core 23.

[0071] During the working process of the solenoid valve assembly provided by the embodiment of the present application, when the coil body 21 is energized instantaneously, the iron core 23 is magnetized to generate a magnetic force. The magnetic force direction of the iron core 23 is the same as that of the permanent magnet 24. The superposition of the magnetic force of the iron core 23 and the magnetic force of the permanent magnet 24 makes the force on one side of the iron core 23 greater than the elastic force of the elastic member 12, that is, the magnetic force overcomes the elastic force of the elastic member 12, the elastic member 12 is compressed, and the valve core body 11 moves towards the iron core 23 until the valve core body 11 and the iron core 23 are in close contact.

[0072] After the valve core body 11 and the iron core 23 are in contact, the electromagnetic coil is de-energized. After de-energization, the magnetization effect of the iron core 23 disappears. The iron core 23 is connected to the permanent magnet 24 through the iron core support seat 25, so that the connection between the iron core support seat 25 and the permanent magnet 24 is closer, so that as much magnetic force generated by the permanent magnet 24 as possible is used for the valve core body 11. The permanent magnet 24 adsorbs the valve core, that is, the magnetic force of the permanent magnet 24 is greater than the elastic force of the elastic member 12, and the valve core body 11 is adsorbed at the iron core 23 and continuously maintained in the first stable state.

[0073] When the coil body 21 is reversely powered (that is, the negative pole is input and the positive pole is output), the iron core 23 has a magnetic force opposite to the magnetic force direction of the permanent magnet 24, and the valve core body 11 moves upward away from the iron core 23. At this time, the elastic member 12 recovers its deformation, that is, the elastic member 12 is in an extended state, and there is a certain distance between the valve core body 11 and the permanent magnet 24. The valve core body 11 cannot be adsorbed by the permanent magnet 24. At this time, the elastic force of the elastic member 12 is much greater than the magnetic force of the permanent magnet 24, and the elastic member 12 provides sufficient support for the valve core body 11 to keep the valve core body 11 in the second stable state, realizing the flow path switching of the solenoid valve assembly.

[0074] In some embodiments of the present application, the solenoid valve assembly further includes a first housing 40, a second housing 50 and an isolation tube 60. The cross-sectional shape of the first housing 40 can be a "Ji" shape, and the second housing 50 is a plate-like structure, which is equivalent to being covered above the "Ji"-shaped first housing 40, so that the first housing 40 and the second housing 50 are assembled to form an accommodation cavity, and the electromagnetic drive assembly 20 is located inside the accommodation cavity.

[0075] The isolation tube 60 is located inside the electromagnetic coil and is hermetically connected to the second housing 50. Both the iron core 23 and the valve core body 11 are located inside the isolation tube 60, and the valve core body 11 moves axially along the isolation tube 60 inside the isolation tube 60.

[0076] Among them, the hermetic connection between the isolation tube 60 and the second housing 50 can be achieved by arranging a sealing housing 70 between the first housing 40 and the second housing 50. One end of the sealing housing 70 close to the isolation tube 60 is bent to form a flange, and the second seal 71 is stuck in the sealing space formed by the flange, the first housing 40 and the isolation tube 60 to realize the seal between the isolation tube 60 and the second housing 50.

[0077] The position where the isolation tube 60 contacts the iron core support seat 25 can also be bent adaptively to achieve a tight fit between the isolation tube 60 and the iron core support seat 25.

[0078] The above-mentioned first housing 40, second housing 50 and sealing housing 70 can all be made of sheet metal, and the isolation tube 60 is made of non-magnetic stainless steel material. As Figure 4 shown, the magnetic circuit schematic diagram of the solenoid valve assembly provided by this application. The magnetic force generated by the permanent magnet 24 is more concentrated and conducted from the iron core 23, acting on the valve core body 11, and is divided into two magnetic branches from both sides of the valve core body 11 and transmitted to the permanent magnet 24 along the housing made of sheet metal material. The magnetic resistance in this magnetic force transmission process is small, the magnetic leakage phenomenon is less, the magnetic force loss is small, and the magnetic force utilization efficiency is relatively high.

[0079] In some embodiments of this application, a limit seat 111 is provided on the valve core body 11. The elastic member 12 can be sleeved on the valve core body 11, and one end of the elastic member 12 is in contact connection with the limit seat 111, and the other end of the elastic member 12 is in contact connection with the isolation tube 60, so that the elastic member 12 is always restricted between the limit seat 111 and the isolation tube 60.

[0080] In some embodiments of this application, both the first housing 40 and the second housing 50 extend outward to form an extension part. This extension part is equivalent to the connection lug of the solenoid valve assembly, and a fixing hole 80 for installing the solenoid valve assembly is provided on the extension part. Through this fixing hole 80, the solenoid valve assembly can be installed at the required position.

[0081] The sealing housing 70 is arranged between the first housing 40 and the second housing 50. It is equivalent to that the extension part is jointly extended outward by the first housing 40, the second housing 50 and the sealing housing 70, which can improve the structural strength of the solenoid valve assembly and facilitate the installation of the solenoid valve assembly at the same time.

[0082] In some embodiments of this application, as Figure 1 and Figure 2As shown in the figure, one side of the iron core 23 facing the valve core body 11 has a convex portion 113, and one side of the valve core body 11 facing the iron core 23 is provided with a concave portion 231 that cooperates with the convex portion 113. When the valve core body 11 is adsorbed to the iron core 23, the convex portion 113 is embedded in the concave portion 231, which can reduce the magnetic attraction between the valve core body 11 and the iron core 23. Therefore, a smaller current can be used to separate the valve core body 11 from the iron core 23, and the structure operates more reliably.

[0083] On the contrary, a convex portion 113 can also be provided on one side of the valve core body 11 facing the iron core 23, and a concave portion 231 that cooperates with the convex portion 113 is provided on one side of the iron core 23 facing the valve core body 11. Any structure that can ensure that the valve core body 11 can be easily detached from the iron core 23 is acceptable.

[0084] In some embodiments of the present application, the iron core 23 is disposed between the valve core body 11 and the permanent magnet 24 through an iron core support seat 25. Compared with embedding the permanent magnet 24 in the iron core 23, it can prevent collisions between the valve core body 11 and the permanent magnet 24, so as to wear the permanent magnet 24; furthermore, it can avoid setting anti-wear structures such as gaskets on the permanent magnet 24, so as to reduce the number of components of the solenoid valve assembly and simplify the assembly.

[0085] According to the embodiments of the present application, in the power-off state of the solenoid valve assembly, under the action of the magnetic field generated by the permanent magnet 24, the iron core 23 and the valve core body 11 are adsorbed, increasing the contact area between the iron core 23 and the permanent magnet 24. Therefore, as much magnetic force generated by the permanent magnet 24 as possible is used for the valve core assembly 10, so as to reduce the magnetic leakage phenomenon, reduce the magnetic force loss of the permanent magnet, effectively improve the magnetic force utilization rate of the permanent magnet, and make the stable effect of the solenoid valve assembly better.

[0086] According to the embodiments of the present application, the iron core 23 and the iron core support seat 25 are integrally provided. Through simulation calculation, under the same conditions (when the structural dimensions of other components remain unchanged), the magnetic leakage above the permanent magnet 24 is reduced, the iron core 23 is in close contact with the permanent magnet 24, and the magnetic resistance between the two is small, so that the magnetic force acting on the valve core body 11 is increased by more than 15%. This shows that the solenoid valve assembly provided by the present application has less magnetic leakage, less magnetic force loss, high magnetic force utilization rate, and good electromagnetic performance.

[0087] The solenoid valve assembly provided by the embodiments of the present application also has the advantages of simple structure, low assembly difficulty, small magnetic force loss, large magnetic force acting on the valve core body 11, and good structural operation reliability. And it adopts a bistable design. When switching the passage, only an instantaneous voltage needs to be applied. After the solenoid valve completes the action, it does not need to be continuously powered on, which is more energy-saving and environmentally friendly.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the present application, rather than limiting the present application. Although the present application has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications, or equivalent replacements of the technical solutions of the present application do not depart from the spirit and scope of the technical solutions of the present application, and should all be covered within the scope of the claims of the present application.

Claims

1. An electromagnetic valve assembly, characterized in that, Comprising: A spool valve assembly; An electromagnetic drive assembly, the electromagnetic drive assembly includes an electromagnetic coil assembly, an iron core, an iron core support seat and a permanent magnet. The iron core is adapted to sense the magnetic force of the electromagnetic coil assembly. The permanent magnet is disposed on one side of the iron core, and the spool valve assembly is disposed on the other side of the iron core. The iron core support seat is connected to the iron core, one side of the iron core support seat abuts against the permanent magnet, and the contact area between the iron core support seat and the permanent magnet is larger than the surface area of the iron core facing the permanent magnet.

2. The electromagnetic valve assembly according to claim 1, characterized in that, The electromagnetic coil assembly includes a coil body and a coil bobbin, and the coil bobbin is configured with a channel; A boss is provided on the side of the iron core support seat facing the iron core, the boss extends into the channel, and the iron core is fixedly connected to the boss.

3. The electromagnetic valve assembly according to claim 2, characterized in that, At least one end of the channel is provided with a receiving groove, and a clamping portion is formed between the receiving groove and the channel; The permanent magnet is located in the receiving groove, one side of the iron core support seat abuts against the permanent magnet, and the other side of the iron core support seat is restricted by the clamping portion.

4. The electromagnetic valve assembly according to claim 1, characterized in that, A counterbore is provided on the side of the iron core support seat facing the permanent magnet. The iron core support seat and the iron core are connected by a fastener, and a part of the iron core is adapted to extend into the counterbore.

5. The electromagnetic valve assembly according to any one of claims 1 to 4, characterized in that, The iron core and the iron core support seat are integrally formed.

6. The electromagnetic valve assembly according to any one of claims 1 to 4, characterized in that, The electromagnetic drive assembly further includes a first seal. A sealing groove is formed between the iron core and the iron core support seat, and the first seal is embedded in the sealing groove.

7. The electromagnetic valve assembly according to any one of claims 1 to 4, characterized in that, Also includes a valve gasket; The spool valve assembly includes a spool valve body and an elastic member. The elastic member is located between the spool valve body and the electromagnetic coil assembly, and the valve gasket is embedded at one end of the spool valve body; The spool valve body is adapted to switch between a first stable state and a second stable state; In the first stable state, the iron core is adsorbed to the permanent magnet through the iron core support seat, the spool valve body is adsorbed to the iron core, and the elastic member is in an elastically deformed state; In the second stable state, the elastic member is adapted to inhibit the spool valve from approaching the permanent magnet.

8. The electromagnetic valve assembly according to claim 7, characterized in that, Also includes a first housing, a second housing and an isolation tube. The first housing and the second housing are assembled to form an accommodation cavity, and the electromagnetic drive assembly is located in the accommodation cavity; The isolation tube is located inside the electromagnetic coil assembly and is hermetically connected to the second housing. The iron core and the spool valve body are both located inside the isolation tube, and the spool valve body is adapted to move axially inside the isolation tube along the isolation tube.

9. The electromagnetic valve assembly according to claim 8, characterized in that, A limit seat is provided on the spool valve body. One end of the elastic member abuts against the limit seat, and the other end of the elastic member abuts against the isolation tube.

10. An electrical equipment, characterized in that, Including the solenoid valve assembly according to any one of claims 1 to 9.

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