CN113958759A

CN113958759A - Electromagnetic valve device

Info

Publication number: CN113958759A
Application number: CN202110923115.8A
Authority: CN
Inventors: 张舒月; 伍继浩; 贾启明
Original assignee: Technical Institute of Physics and Chemistry of CAS
Current assignee: Technical Institute of Physics and Chemistry of CAS
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2022-01-21

Abstract

The invention is suitable for the field of valves, and discloses an electromagnetic valve device, which comprises a shell assembly, a first valve body assembly, a second valve body assembly and a valve core assembly, wherein the first valve body assembly is arranged at one end of the shell assembly, the second valve body assembly is arranged at the other end of the shell assembly, the first valve body assembly and the second valve body assembly are enclosed to form a valve cavity, the first valve body assembly and the second valve body assembly both comprise magnets, a flow channel is arranged on the second valve body assembly, the valve cavity is communicated with the outside through the flow channel, the valve core assembly is arranged in the valve cavity and is used for sealing or opening the flow channel, one of the first valve body assembly and the second valve body assembly is also provided with a second conductive coil, and the opening or sealing of the flow channel of the valve core assembly is controlled by controlling the resultant force direction of the magnetic force generated by the first valve body assembly and the magnetic force generated by the second valve body assembly so as to enable the electromagnetic valve device to be in an open state or a closed state, the electromagnetic valve device does not need to be provided with a spring, and the unreliable problem caused by the failure of the low-temperature environment is avoided.

Description

Electromagnetic valve device

Technical Field

The invention relates to the technical field of valves, in particular to an electromagnetic valve device.

Background

The electromagnetic valve can realize active control of fluid flow direction, flow velocity and the like under the action of electromagnetic force, and is an indispensable basic element in a low-temperature refrigeration cycle system of liquid helium, liquid nitrogen, liquid oxygen, liquid hydrogen and the like. The mechanical structure of the solenoid valve generally includes a valve body and a valve element. The core rod moves under the driving of the electromagnetic force generated by the valve body to control the opening and closing of the flow passage, thereby realizing the on-off of the fluid.

However, the common solenoid valves in the market at present mainly realize the movement and the reset of the valve core through the active electromagnetic force of the electromagnet and the pre-tightening elastic force of the spring. The electromagnetic valve has the following problems:

first, the solenoid valve is complicated in structure and is prone to cause sealing problems.

Secondly, after the electromagnetic valve is used for a period of time, the elastic element is easy to generate stress fatigue due to repeated deformation, so that the problem of insufficient restoring force is caused, the valve core cannot be rapidly reset, and the normal work of the electromagnetic valve is influenced.

Thirdly, the common spring has low temperature brittleness, so the spring needs to adopt special materials to adapt to special low temperature working media in low temperature environment.

Disclosure of Invention

The invention aims to provide a solenoid valve device, which aims to solve the technical problems that the existing solenoid valve is easy to cause insufficient restoring force and unreliable caused by failure in a low-temperature environment due to the fact that a spring is adopted to realize the movement and the reset of a valve core.

In order to achieve the purpose, the invention provides the following scheme:

a solenoid valve device comprises a shell assembly, a first valve body assembly, a second valve body assembly and a valve core assembly, wherein the first valve body assembly is arranged at one end of the shell assembly, the second valve body assembly is arranged at the other end of the shell assembly, the first valve body assembly and the second valve body assembly are enclosed to form a valve cavity, the first valve body assembly comprises a first magnet, the second valve body assembly comprises a second magnet, a flow channel is arranged on the second valve body assembly, the valve cavity is communicated with the outside through the flow channel, the valve core assembly is arranged in the valve cavity and used for sealing or opening the flow channel, the first valve body assembly further comprises a first conductive coil which is arranged around the first magnet and used for controlling the magnetic force of the first valve body assembly or the second valve body assembly further comprises a second conductive coil which is arranged around the second magnet and used for controlling the magnetic force of the second valve body assembly, the resultant force of the magnetic force generated by the first valve body assembly and the magnetic force generated by the second valve body assembly is directed to the first valve body assembly, the valve core assembly and the first valve body assembly are attracted to open the flow passage, the resultant force of the magnetic force generated by the first valve body assembly and the magnetic force generated by the second valve body assembly is directed to the second valve body assembly, and the valve core assembly and the second valve body assembly are attracted to seal the flow passage.

As a preferred embodiment, the first valve body assembly further includes a first conductive coil wound around the first magnet, the first conductive coil is powered off, the magnitude of the magnetic force generated by the second magnet is greater than the magnitude of the magnetic force generated by the first magnet, the direction of the magnetic force generated by the second magnet is directed to the second valve body assembly, and the valve core assembly and the second valve body assembly attract each other to seal the flow passage; the first conductive coil is electrified, the magnetic force value of the first valve body is larger than that of the second magnet, the direction of the magnetic force of the first valve body assembly points to the first valve body assembly, and the valve core assembly and the first valve body assembly attract each other to open the flow channel.

As a preferred embodiment, the first valve body assembly further comprises a first bracket mounted on the housing assembly, and the first magnet and the first conductive coil are both mounted on an end surface of the first bracket facing the second valve body assembly.

As a preferred embodiment, the second valve body assembly further includes a second bracket and a second gland that are mounted on the housing assembly, the second bracket is mounted on the housing assembly, the second gland is press-fitted on the second bracket and is disposed inside the second bracket, a second magnet groove for mounting the second magnet is formed between the second bracket and the second gland, the second magnet is mounted in the second magnet groove, and the flow channel is opened on the second gland.

As a preferred embodiment, the second valve body assembly further includes a second conductive coil wound around the second magnet, the second conductive coil is powered off, the magnitude of the magnetic force generated by the first magnet is greater than the magnitude of the magnetic force generated by the second magnet, the direction of the magnetic force generated by the first magnet is directed to the first valve body assembly, and the valve core assembly and the first valve body assembly attract each other to open the flow passage; the second conductive coil is electrified, the magnitude of the magnetic force generated by the first magnet is smaller than that of the second valve body assembly, the direction of the magnetic force of the second valve body assembly points to the second valve body assembly, and the valve core assembly and the second valve body assembly attract each other to seal the flow channel.

As a preferred embodiment, the first valve body assembly further comprises a first bracket mounted on the housing assembly and a first gland covering the first bracket, wherein a first magnet groove is formed on a side of the first bracket facing the second valve body assembly in a recessed manner, the first magnet is mounted in the first magnet groove, and the first gland covers the first bracket and seals the first magnet groove; the second valve body assembly further comprises a second support and a second gland which are installed on the shell assembly, the second support is installed on the shell assembly, the second gland is pressed on the second support and is arranged on the inner side of the second support, a second magnet groove used for installing the second magnet is formed between the second support and the second gland, the second magnet is installed in the second magnet groove, the second conductive coil is installed and faces one side of the first magnet, and the flow channel is opened on the second gland.

As a preferred embodiment, the valve core assembly includes a core print disposed between the first magnet and the second magnet and a core rod disposed in the flow channel and connected to the core print, the core print has magnetism and is disposed in a flat plate shape, the core print attracts the first valve body assembly, and the flow channel is open; the core print is attracted to the second valve body assembly, and the flow passage is sealed.

As a preferred embodiment, the core print is pressed from longitudinally placed silicon steel laminations.

As a preferred embodiment, the valve core assembly further comprises a valve core protective sleeve sleeved on the outer surface of the valve core.

As a preferred embodiment, the housing assembly includes a first housing and a second housing detachably connected to the first housing, and the first housing and the second housing are hermetically connected, the first valve body assembly is mounted on the first housing, and the second valve body assembly is mounted on the second housing.

The electromagnetic valve device provided by the invention has the following advantages:

firstly, the electromagnetic valve device has three working states of normally open, normally closed and variable frequency reciprocating by controlling the position of the valve core assembly.

Secondly, one of the first valve body assembly and the second valve body assembly of the electromagnetic valve device comprises a magnet, and the other comprises the magnet and the conductive coil, so that the electromagnetic valve device can be in a self-maintaining normally-open or normally-closed state under the condition that the conductive coil is not electrified, and can also change the position of the valve core assembly by electrifying the conductive coil, and the electromagnetic valve device can have three working states of normally-open, normally-closed and frequency conversion reciprocating under the condition that a spring is not used, thereby avoiding the problems of unreliable performance, limited service life and the like caused by high-frequency deformation of the spring under a low-temperature environment. In addition, the working state of the electromagnetic valve device is changed by switching on and off the electromagnetic valve device, and the electromagnetic valve device has high response speed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a solenoid valve device according to an embodiment of the present invention;

FIG. 2 is a schematic magnetic circuit diagram of the solenoid valve assembly of FIG. 1;

FIG. 3 is a schematic structural diagram of a solenoid valve device according to another embodiment of the present invention;

fig. 4 is a schematic view of the magnetic circuit of the solenoid valve device of fig. 3.

The reference numbers illustrate:

10. a housing assembly; 11. a first housing; 12. a second housing; 13. a valve cavity;

20. a first valve body assembly; 21. a first magnet; 22. a first conductive coil; 23. a first bracket; 231. a first magnet slot; 24. a first gland;

30. a second valve body assembly; 31. a second magnet; 32. a second conductive coil; 33. a second bracket; 34. a second gland; 35. a flow channel; 36. a second magnet slot;

40. a valve core assembly; 41. a core print; 42. a core bar; 43. and a valve core protective sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 and 2, a solenoid valve device according to an embodiment of the present invention is used to control a fluid flow or direction, and the solenoid valve device does not need to provide an elastic member such as a spring, a bellows, and a corrugated reed that needs to be repeatedly deformed, thereby avoiding an unreliable problem caused by a low temperature environment failure.

Referring to fig. 1 to 4, a solenoid valve device according to an embodiment of the present invention includes a housing assembly 10, a first valve assembly 20, a second valve assembly 30, and a valve core assembly 40, wherein the first valve assembly 20 is disposed at one end of the housing assembly 10, the second valve assembly 30 is disposed at the other end of the housing assembly 10, the first valve assembly 20, and the second valve assembly 30 enclose a valve cavity 13, the first valve assembly 20 includes a first magnet 21, the second valve assembly 30 includes a second magnet 31, a flow channel 35 is disposed on the second valve assembly 30, the valve cavity 13 communicates with the outside through the flow channel 35, the valve core assembly 40 is disposed in the valve cavity 13 and is used for sealing or opening the flow channel 35, the first valve assembly 20 further includes a first conductive coil 22 disposed around the first magnet 21 and used for controlling the magnetic force and the magnetic force direction of the first valve assembly 20, or the second valve assembly 30 further includes a second conductive coil 22 disposed around the second magnet 31 and used for controlling the second valve assembly 30 The magnetic force and the magnetic force direction of the second conductive coil 32, the resultant force of the magnetic force generated by the first valve body assembly 20 and the magnetic force generated by the second valve body assembly 30 is directed to the first valve body assembly 20, the valve core assembly 40 is attracted to the first valve body assembly 20 to open the flow passage 35, the solenoid valve device is in an open state, the resultant force of the magnetic force generated by the first valve body assembly 20 and the magnetic force generated by the second valve body assembly 30 is directed to the second valve body assembly 30, the valve core assembly 40 is attracted to the second valve body assembly 30 to seal the flow passage 35, and the solenoid valve device is in a closed state.

Referring to fig. 1 and 2, as an embodiment of the present invention, a conductive coil is disposed in the first valve body assembly 20, that is, the first valve body assembly 20 further includes a first conductive coil 22 disposed around the first magnet 21. To seal the flow passage 35, the resultant of the magnetic forces generated by the first valve body assembly 20 and the second valve body assembly 30 is directed to the second valve body assembly 30, and the resultant of the magnetic forces generated by the first valve body assembly 20 and the second valve body assembly 30 is directed to the second valve body assembly 30 in two ways. In the first mode, the first conductive coil 22 is powered off, the magnitude of the magnetic force generated by the second magnet 31 is greater than the magnitude of the magnetic force generated by the first magnet 21, and the direction of the magnetic force generated by the second magnet 31 is directed to the second valve body assembly 30. In the second mode, the first conductive coil 22 is energized, the magnitude of the magnetic force generated by the second valve body assembly 30 is greater than the magnitude of the magnetic force of the whole first valve body assembly 20, and the direction of the magnetic force of the second magnet 31 is directed to the second valve body assembly 30.

In order to save energy, when the electromagnetic valve device needs to be kept in a normally closed state, the first working mode is selected. On this basis, when the operating state of the solenoid valve device needs to be changed (the flow passage 35 is opened), the resultant force of the magnetic forces generated by the first valve body assembly 20 and the second valve body assembly 30 needs to be directed to the first valve body assembly 20, that is, the first conductive coil 22 needs to be energized, in order to accelerate the corresponding speed, the direction of the magnetic force of the first magnet 21 is preferably directed to the first valve body assembly 20, and the direction of the magnetic force generated by the first conductive coil 22 is the same as the direction of the magnetic force of the first magnet 21 (that is, the direction of the magnetic induction line generated by the first magnet 21 is the same as the direction of the magnetic induction line generated by the first conductive coil 22), at this time, only a small current needs to be energized, so that the magnitude of the magnetic force generated by the first valve body assembly 20 as a whole is larger than the magnitude of the magnetic force generated by the second valve body assembly 30, and the resultant force of the two points to the first valve body assembly 20.

It will be appreciated that when the first electrically conductive coil 22 is energized at a fixed frequency, the valve core assembly 40 reciprocates at that frequency, and the solenoid valve assembly is in a variable frequency reciprocating state.

In this embodiment, the first valve body assembly 20 further includes a first bracket 23 mounted on the housing assembly 10, and the first magnet 21 and the first conductive coil 22 are mounted on an end surface of the first bracket 23 facing the second valve body assembly 30 (the second bracket 33). The first bracket 23 is provided to integrate the first magnet 21 and the first conductive coil 22 and then to be assembled to the housing assembly 10, which is more convenient to assemble.

Specifically, the first support 23 is made of a non-magnetic conductive material.

The second valve body assembly 30 further includes a second support 33 and a second pressing cover 34 mounted on the housing assembly 10, the second support 33 is mounted on the housing assembly 10, the second pressing cover 34 is press-fitted on the second support 33 and disposed inside the second support 33, a second magnet groove 36 for mounting the second magnet 31 is formed between the second support 33 and the second pressing cover 34, the second magnet 31 is mounted in the second magnet groove 36, and the flow channel 35 is opened on the second pressing cover 34.

Specifically, the second holder 33 and the second gland 34 are both made of a non-magnetic conductive material.

Referring to fig. 3 and 4, as another embodiment of the present invention, a conductive coil is disposed in the second valve body assembly 30, that is, the second valve body assembly 30 further includes a second conductive coil 32 disposed around the second magnet 31. To open the flow passage 35, the resultant of the magnetic forces generated by the first valve body assembly 20 and the second valve body assembly 30 is directed to the first valve body assembly 20, and the resultant of the magnetic forces generated by the first valve body assembly 20 and the second valve body assembly 30 is directed to the first valve body assembly 20 in two ways. In the first mode, the second conductive coil 32 is de-energized, the magnitude of the magnetic force generated by the first magnet 21 is greater than the magnitude of the magnetic force generated by the second magnet 31, and the direction of the magnetic force generated by the first magnet 21 is directed to the first valve body assembly 20. In the second mode, the second conductive coil 32 is energized, the magnitude of the magnetic force generated by the first magnet 21 is greater than the magnitude of the magnetic force of the second valve body assembly 30 as a whole, and the direction of the magnetic force of the first magnet 21 is directed to the first valve body assembly 20.

In order to save energy, when the electromagnetic valve device needs to be kept in a normally open state, the first working mode is selected. On this basis, when the operating state of the solenoid valve device needs to be changed (the flow passage 35 is sealed), the resultant force of the magnetic forces generated by the first valve body assembly 20 and the second valve body assembly 30 needs to be directed to the second valve body assembly 30, that is, the second conductive coil 32 needs to be energized, in order to accelerate the corresponding speed, the direction of the magnetic force of the second magnet 31 is preferably directed to the second valve body assembly 30, and the direction of the magnetic force generated by the second conductive coil 32 is the same as the direction of the magnetic force of the second magnet 31 (that is, the direction of the magnetic induction line generated by the second magnet 31 is the same as the direction of the magnetic induction line generated by the second conductive coil 32), and at this time, only a small current needs to be energized, so that the magnitude of the magnetic force generated by the second valve body assembly 30 as a whole is larger than the magnitude of the magnetic force generated by the first valve body assembly 20, and the resultant force of the two points to the second valve body assembly 30.

It will be appreciated that when the second conductive coil 32 is energized at a fixed frequency, the valve core assembly 40 reciprocates at that frequency, and the solenoid valve assembly is in a variable frequency reciprocating state.

In this embodiment, the first valve body assembly 20 further includes a first bracket 23 mounted on the housing assembly 10 and a first gland 24 covering the first bracket 23, a first magnet slot 231 is formed on a side of the first bracket 23 facing the second valve body assembly 30, the first magnet 21 is mounted in the first magnet slot 231, and the first gland 24 covers the first bracket 23 and seals the first magnet slot 231, which is designed to facilitate the mounting and dismounting of the first magnet 21.

Specifically, the first holder 23 and the first gland 24 are both made of a non-magnetic conductive material.

The second valve body assembly 30 further includes a second support 33 and a second pressing cover 34 mounted on the housing assembly 10, the second support 33 is mounted on the housing assembly 10, the second pressing cover 34 is press-fitted on the second support 33 and is disposed inside the second support 33, a second magnet slot 36 for mounting the second magnet 31 is formed between the second support 33 and the pressing cover, the second magnet 31 is mounted in the second magnet slot 36, the second conductive coil 32 is mounted on a side of the second pressing cover 34 facing the first magnet 21, and the flow channel 35 is opened on the second pressing cover 34.

It can be seen that the solenoid valve assembly can be switched between the on and off states by merely providing a conductive coil in one of the first valve body assembly 20 and the second valve body assembly 30.

It will be appreciated that when the operating condition of the solenoid valve assembly is predominantly normally closed, the provision of the first electrically conductive coil 22 in the first valve body assembly 20 is selected so that the solenoid valve assembly is self-retaining in the normally closed condition, providing greater power savings and no heat generation. When the working state of the solenoid valve device is mainly normally closed, the second conductive coil 32 is selectively arranged on the second valve body assembly 30, so that the solenoid valve device can be self-maintained under the condition of normally open, energy can be saved, and no heat generation occurs.

Specifically, both the first magnet 21 and the second magnet 31 are permanent magnets.

Referring to fig. 1 to 4, the valve core assembly 40 includes a core 41 disposed between the first magnet 21 and the second magnet 31, and a core rod 42 disposed in the flow passage 35 and connected to the core 41, wherein the core 41 is disposed in a flat plate shape, and the core 41 has magnetism and can attract the first valve assembly 20 or the second valve assembly 30. When the core 41 is attracted to the first valve body assembly 20, the flow passage 35 is open and the solenoid valve assembly is in an open state, and when the core 41 is attracted to the second valve body assembly 30, the flow passage 35 is sealed and the solenoid valve assembly is in a closed state. The electromagnetic valve device of the embodiment of the invention designs the flat core head 41, and utilizes the stress of two end surfaces of the core head 41, namely the flat plate to realize the stress, thereby replacing the common stress of the core rod 42 in the market. Under the same coil current, the stress can be effectively increased by increasing the area of the flat plate, and the response speed is accelerated.

Further, the valve core assembly 40 further includes a valve core protection sleeve 43 disposed on the outer surface of the valve core 41. The spool cover 43 is made of polyimide, is resistant to low temperature and impact, and wraps the core print 41 through the spool cover 43, thereby having a function of fixing and protecting the core print 41. In addition, the valve core protective sleeve 43 is not magnetic conductive, so that the excessive bonding and difficult separation of the magnetic pole and the valve head due to the overlarge magnetic force caused by the gapless contact of the magnetic pole and the valve head can be avoided.

Specifically, the core head 41 is formed by pressing longitudinally placed silicon steel laminations, and the valve core protective sleeve 43 wraps the silicon steel laminations and has the functions of fixing and protecting the silicon steel laminations. The core rod 42 is made of a non-magnetic material. The core head 41 and the core rod 42 are connected by means of screws or interference fit or the like.

Referring to fig. 1-4, the housing assembly 10 includes a first housing 11 and a second housing 12 detachably connected to the first housing 11, and the first housing 11 and the second housing 12 are sealed by a sealing means to seal the gas inside the valve and the gas outside the valve, and the specific sealing manner is not limited. The first valve body assembly 20 is mounted on the first housing 11, the second valve body assembly 30 is mounted on the second housing 12, and the first housing 11 and the second housing 12 are made of a non-magnetic material, such as a stainless steel material. The first housing 11 and the second housing 12 are detachably connected, so that the first valve body assembly 20 and the second valve body assembly 30 can be assembled and disassembled more conveniently.

The electromagnetic valve device provided by the embodiment of the invention has the following advantages:

first, the solenoid valve device according to the embodiment of the present invention enables the solenoid valve device to have three working states, i.e., normally open, normally closed, and variable frequency reciprocating, by controlling the position of the valve core assembly 40.

Secondly, one of the first valve body assembly 20 and the second valve body assembly 30 of the electromagnetic valve device of the embodiment of the invention comprises a magnet, and the other comprises a magnet and a conductive coil, so that the electromagnetic valve device can be self-maintained in a normally open state or a normally closed state under the condition that the conductive coil is not electrified, and can be changed in position of the valve core assembly 40 by electrifying the conductive coil, so that the electromagnetic valve device can have three working states of normally open, normally closed and frequency conversion reciprocating under the condition that a spring is not used, and the problems of unreliable performance, limited service life and the like caused by high-frequency deformation of the spring under a low-temperature environment are solved. In addition, the electromagnetic valve device provided by the embodiment of the invention changes the working state of the electromagnetic valve device by switching on and off, and has high response speed.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides an electromagnetic valve device, its characterized in that, includes casing subassembly, first valve body subassembly, second valve body subassembly and case subassembly, first valve body subassembly is located casing subassembly's one end, the second valve body subassembly is located casing subassembly's the other end, just casing subassembly first valve body subassembly with second valve body subassembly encloses to close and forms the valve pocket, first valve body subassembly includes first magnet, second valve body subassembly includes the second magnet, just be equipped with the runner on the second valve body subassembly, the valve pocket passes through runner and external intercommunication, the case subassembly is located in the valve pocket, and be used for sealed or open the runner, first valve body subassembly is still including establishing around first magnet week side and be used for controlling first valve body subassembly's magnetic force first electrically conductive coil or second valve body subassembly is still including establishing around the week side of second magnet and be used for controlling second valve body subassembly's magnetic force The resultant force of the magnetic force generated by the first valve body assembly and the magnetic force generated by the second valve body assembly is directed to the first valve body assembly, the valve core assembly and the first valve body assembly are attracted to open the flow passage, the resultant force of the magnetic force generated by the first valve body assembly and the magnetic force generated by the second valve body assembly is directed to the second valve body assembly, and the valve core assembly and the second valve body assembly are attracted to seal the flow passage.

2. The solenoid valve assembly as described in claim 1 wherein said first valve body assembly further comprises a first conductive coil disposed around said first magnet, said first conductive coil being de-energized, said second magnet generating a magnetic force of a magnitude greater than that of said first magnet, said second magnet generating a magnetic force directed toward said second valve body assembly, said spool assembly attracting said second valve body assembly to seal said flow path; the first conductive coil is electrified, the magnetic force value of the first valve body is larger than that of the second magnet, the direction of the magnetic force of the first valve body assembly points to the first valve body assembly, and the valve core assembly and the first valve body assembly attract each other to open the flow channel.

3. The solenoid valve assembly as described in claim 2 wherein said first valve body assembly further comprises a first bracket mounted to said housing assembly, said first magnet and said first conductive coil each being mounted to an end surface of said first bracket facing said second valve body assembly.

4. The solenoid valve assembly as claimed in claim 2, wherein the second valve body assembly further comprises a second bracket and a second gland mounted on the housing assembly, the second bracket is mounted on the housing assembly, the second gland is press-fitted on the second bracket and disposed inside the second bracket, a second magnet slot for mounting the second magnet is formed between the second bracket and the second gland, the second magnet is mounted in the second magnet slot, and the flow passage is opened on the second gland.

5. The solenoid valve device according to claim 1, wherein said second valve body assembly further comprises a second conductive coil disposed around said second magnet, said second conductive coil is de-energized, the magnitude of the magnetic force generated by said first magnet is greater than the magnitude of the magnetic force generated by said second magnet, and the direction of the magnetic force generated by said first magnet is directed toward said first valve body assembly, said spool assembly attracts said first valve body assembly to open said flow passage; the second conductive coil is electrified, the magnitude of the magnetic force generated by the first magnet is smaller than that of the second valve body assembly, the direction of the magnetic force of the second valve body assembly points to the second valve body assembly, and the valve core assembly and the second valve body assembly attract each other to seal the flow channel.

6. The solenoid valve device according to claim 5, wherein said first valve body assembly further comprises a first bracket mounted on said housing assembly and a first gland covering said first bracket, a first magnet groove is formed in a side of said first bracket facing said second valve body assembly, said first magnet is mounted in said first magnet groove, and said first gland covers said first bracket and seals said first magnet groove; the second valve body assembly further comprises a second support and a second gland which are installed on the shell assembly, the second support is installed on the shell assembly, the second gland is pressed on the second support and is arranged on the inner side of the second support, a second magnet groove used for installing the second magnet is formed between the second support and the second gland, the second magnet is installed in the second magnet groove, the second conductive coil is installed and faces one side of the first magnet, and the flow channel is opened on the second gland.

7. The solenoid valve device according to claim 1, wherein the spool assembly includes a core disposed between the first magnet and the second magnet and a core rod disposed in the flow passage and connected to the core, the core has magnetism and is disposed in a flat plate shape, the core is attracted to the first valve body assembly, and the flow passage is open; the core print is attracted to the second valve body assembly, and the flow passage is sealed.

8. The solenoid valve assembly of claim 7, wherein said core head is pressed from longitudinally disposed laminations of silicon steel.

9. The solenoid valve assembly of claim 8, wherein the spool assembly further comprises a spool protective sleeve disposed about an outer surface of the spool.

10. The solenoid valve assembly of claim 1 wherein said housing assembly comprises a first housing and a second housing removably attached to said first housing and sealingly attached to said second housing, said first valve body assembly being mounted to said first housing and said second valve body assembly being mounted to said second housing.