Pulse electromagnetic valve

Abstract

The utility model discloses a pulse electromagnetic valve which comprises a valve body and a valve head. The valve body comprises a valve seat, a diaphragm assembly and a pressing plate. A mounting opening is formed in the valve seat, and the diaphragm assembly is mounted at the mounting opening through the pressing plate; a pressure relief hole is formed in the other end of the pressing plate, and a side opening channel is formed in the bottom end of the pressure relief hole; water passing channels are formed outside the pressing plates; the pressure relief hole is communicated with the water passing channel through the side opening channel; the valve head comprises a magnetic conductive support and an electromagnet assembly, the electromagnet assembly comprises a framework and a coil, a permanent magnet, a magnetic ring, a first spring, an iron core and a rubber cap are sequentially arranged in the framework from top to bottom, and the iron core is movably arranged in the framework; and the rubber cap can be driven to be switched between a closed state in which the rubber cap is attached to the pressure relief hole and a communicated state in which the rubber cap is separated from the pressure relief hole. The utility model not only can meet the use requirement of a micro space, but also has high sensitivity, convenience in processing and good sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, and particularly relates to a pulse solenoid valve. Background Art

[0002] The pulse solenoid valve, also known as a diaphragm valve, inputs a pulse signal to the coil inside the solenoid valve body through a wire. The pulse valve is controlled by the output signal of the pulse injection controller. Relying on the pressure change between the two air chambers in front of and behind the valve, the rubber diaphragm flexes and deforms to achieve the opening and closing of the pulse valve. The larger the diameter of the rubber diaphragm, the greater its stroke, and the better the injection performance of the pulse valve. However, the integrity between the valve core part and the housing of the existing pulse solenoid valve is poor. It is necessary to effectively fix or limit the housing and the valve core part bracket by means of structures such as bolts, resulting in low overall assembly efficiency, large volume, high power consumption, high cost, and inability to meet the usage requirements of small spaces.

[0003] The Chinese utility model patent with the application number CN202221425785.3 discloses a pulse solenoid valve. By effectively utilizing sealing rings between the pressure plate and the coil seat, and between the coil seat and the iron core to form a flow-through channel, it avoids designing complex diversion channels inside the valve body and the valve head, not only making the structure more compact, but also enhancing the integrity between the valve body and the valve head. However, since the columnar pressure relief hole sequentially passes through the needle spring and the guiding through hole and is sleeved with a plug, and the guiding through hole and the outer wall of the columnar pressure relief hole can be movably and sealingly matched, it is easy to cause interference between the pressure relief channel and the opening and closing of the diaphragm assembly, affecting the function of the diaphragm assembly. Secondly, the outer wall of the columnar pressure relief hole and the diaphragm assembly can be movably and sealingly matched, with great cooperation difficulty and poor sealing effect, and it is easy to fail when the water pressure in the water inlet cavity rises. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a pulse solenoid valve that can meet the usage requirements of small spaces, has high sensitivity, is easy to process, and has good sealing effect.

[0005] The purpose of the utility model is achieved by adopting the following technical solutions:

[0006] A pulse solenoid valve, characterized in that it includes a valve body and a valve head;

[0007] The valve body includes a valve seat, a diaphragm assembly and a pressure plate; an installation opening is provided on the valve seat; the diaphragm assembly is installed in the installation opening through the pressure plate; one end of the pressure plate close to the installation opening is provided with a water passing cavity, and the other end is provided with a pressure relief hole. A side opening channel is arranged at the bottom end of the pressure relief hole; a water passing channel is formed outside the pressure plate; the pressure relief hole is communicated with the water passing channel through the side opening channel;

[0008] The valve head includes a magnetic conductive bracket disposed above the pressing plate and an electromagnet assembly disposed within the magnetic conductive bracket. The electromagnet assembly includes a skeleton and a coil wound around the outer side of the skeleton. A permanent magnet is provided at the upper end of the skeleton, and the end of the permanent magnet contacts the top of the magnetic conductive bracket. Inside the skeleton, a permanent magnet, a magnetic ring, a first spring, an iron core sleeved outside the first spring, and a rubber cap are sequentially arranged from top to bottom. The iron core is movably disposed within the skeleton and can drive the rubber cap to switch between a closed state where it fits with the pressure relief hole and a communicating state where it disengages from the pressure relief hole.

[0009] In an alternative embodiment, the valve seat is sequentially provided with a water inlet, a water inlet cavity, a water outlet cavity, and a water outlet. The water passing cavity is disposed between the water inlet cavity and the water outlet cavity; a first water passing port is formed between the water passing cavity and the water inlet cavity, and a second water passing port is formed between the water passing cavity and the water outlet; the top end of the pressure relief hole communicates with the water inlet cavity, and the bottom end of the pressure relief hole communicates with the water outlet cavity through a side opening channel and a water passing channel.

[0010] In an alternative embodiment, the diaphragm assembly includes a diaphragm main body, a diaphragm bracket, and a diaphragm spring. The edge of the diaphragm main body is pressed between the valve seat mounting opening and the pressing plate; a clamping hole is formed on the diaphragm main body, and a clamping post is formed at the corresponding position of the diaphragm bracket. The diaphragm bracket is fixed to the diaphragm main body through the cooperation of the clamping post and the clamping hole; the diaphragm main body, the diaphragm bracket, and the diaphragm spring are coaxially arranged.

[0011] In an alternative embodiment, a first through hole is formed on the diaphragm main body, and the first through hole is disposed close to the first water passing port to communicate the water inlet cavity and the water passing cavity through the first through hole; one end of the diaphragm spring abuts against the inner wall of the water passing cavity, and the other end abuts against the diaphragm bracket. The diaphragm spring is disposed close to the second water passing port, and the diaphragm main body is blocked at the second water passing port by the elastic force provided by the diaphragm spring.

[0012] In an alternative embodiment, a pressure relief cavity is formed between the pressing plate and the skeleton, and the top end of the pressure relief hole extends into the pressure relief cavity; a second through hole is provided on the pressing plate, and the second through hole is used to communicate the pressure relief cavity and the water passing cavity.

[0013] In an alternative embodiment, a filtering structure is provided at the first water passing port.

[0014] In an alternative embodiment, a third sealing ring is provided between the outer side of the pressing plate and the inner wall edge of the mounting opening of the valve seat.

[0015] In an alternative embodiment, a cavity for accommodating the permanent magnet, magnetic ring, first spring, iron core and rubber cap is provided inside the skeleton. A tubular structure for extending the cavity is formed at the lower end of the skeleton. A first sealing ring is provided between the outer wall of the tubular structure and the pressing plate. A second sealing ring is provided between the magnetic ring and the inner wall of the cavity. The first sealing ring and the second sealing ring are sealed to form the pressure relief cavity.

[0016] In an alternative embodiment, a counterbore for accommodating the first spring is provided on the iron core. A water passage hole is provided in the counterbore. An overflow groove is provided on the inner wall of the tubular structure. The overflow groove is communicated with the water passage hole.

[0017] In an alternative embodiment, the permanent magnet, magnetic ring, first spring, iron core and rubber cap are coaxially arranged and coincide with the central axis of the skeleton. A rubber coating layer for covering the coil is provided on the skeleton.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. The pulse solenoid valve of the present utility model effectively utilizes sealing rings between the pressing plate and the skeleton, and between the skeleton and the magnetic ring to form a flow-through channel, thus avoiding the design of complex diversion channels in the valve body and valve head. It not only has a more compact structure, strong integrity between the valve body and the valve head, is easy to assemble, but also is small in size, low in power consumption and low in cost, can meet the use requirements of small spaces, and has good adaptability and versatility.

[0020] 2. The pulse solenoid valve of the present utility model sets a side-opening channel and a water passage at the bottom end of the pressure relief hole, guides the bottom of the pressure relief hole to the side of the pressing plate and communicates with the water outlet cavity, so that the pressure relief channel and the diaphragm assembly are independently arranged, avoiding interference and mutual influence between the two, and at the same time avoiding a large amount of space in the water passage cavity. A diaphragm bracket is arranged between the diaphragm body and the diaphragm spring, further improving the stability of the diaphragm body, facilitating the opening and closing of the diaphragm body, enabling it to respond quickly under water pressure changes and improving sensitivity. A third sealing ring is arranged between the pressing plate and the inner wall of the valve seat to seal the water passage, which is simple in processing and good in sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view of the pulse solenoid valve of Embodiment 1;

[0022] Figure 2 It is a sectional view of the pulse solenoid valve of Embodiment 1 along the A-A section;

[0023] Figure 3 It is a structural schematic diagram of the valve seat of Embodiment 1;

[0024] Figure 4Schematic structural diagram of the pressing plate in Embodiment 1.

[0025] In the figure: 100, valve seat; 110, mounting port; 111, third sealing ring; 120, water inlet; 130, water inlet cavity; 131, first water passing hole; 140, water outlet cavity; 141, second water passing hole; 150, water outlet; 160, filtering structure; 200, diaphragm assembly; 210, diaphragm body; 220, diaphragm support; 230, diaphragm spring; 300, pressing plate; 310, water passing cavity; 320, pressure relief hole; 330, side opening channel; 340, water passing channel; 350, pressure relief cavity; 360, second through hole; 400, magnetic conductive support; 500, electromagnet assembly; 510, skeleton; 511, cavity; 512, tubular structure; 513, first sealing ring; 520, permanent magnet; 530, magnetic force ring; 531, second sealing ring; 540, first spring; 550, iron core; 551, counterbore; 552, water passing hole; 560, rubber cap. Detailed implementation manners

[0026] Next, in combination with the accompanying drawings and specific implementation manners, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application.

[0027] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing 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 should not be construed as a limitation to the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically and precisely defined.

[0028] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "connected", "communicated", "connected" should be understood in a broad sense. For example, it can be a fixed connection, or can be connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0029] In the description, claims and the above-mentioned drawings of the present application, terms such as "first" and "second" are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0030] Embodiment 1:

[0031] Please refer to Figures 1-4 , this embodiment provides a pulse solenoid valve, which includes a valve body and a valve head connected to each other;

[0032] The valve body includes a valve seat 100, a diaphragm assembly 200 and a pressure plate 300; the diaphragm assembly 200 is arranged between the pressure plate 300 and the valve seat 100.

[0033] In this embodiment, an inlet 120 for water inlet and an outlet 150 for water outlet are respectively formed at both ends of the valve seat 100, and an installation opening 110 for installing the diaphragm assembly 200 and the pressure plate 300 is formed in the middle. An inlet cavity 130 is formed at one end of the valve seat 100 close to the inlet 120, and an outlet cavity 140 is formed at one end close to the outlet 150.

[0034] The diaphragm assembly 200 is installed in the installation opening 110 through the pressure plate 300;

[0035] One end of the pressure plate 300 close to the installation opening 110 is provided with a water passing cavity 310, that is, the water passing cavity 310 is arranged between the inlet cavity 130 and the outlet cavity 140. A first water passing port 131 is formed between the water passing cavity 310 and the inlet cavity 130, and a filtering structure 160 is arranged at the first water passing port 131, so as to improve the cleanliness of the fluid entering the valve body and avoid blocking the internal channel of the valve head and affecting the service life. A second water passing port 141 is formed between the water passing cavity 310 and the outlet 150.

[0036] The other end of the pressing plate 300 is used to connect with the valve head. A pressure relief hole 320 is provided at one end of the pressing plate 300 close to the valve head. The pressure relief hole 320 has a top end and a bottom end. The top end is the end close to the valve head, and the bottom end is the end close to the valve seat 100. The top end of the pressure relief hole 320 is connected to the water inlet cavity 130, and a side-opening channel 330 is provided at the bottom end of the pressure relief hole 320. A water passing channel 340 is formed on the outer side of the pressing plate 300. One end of the water passing channel 340 is communicated with the side-opening channel 330, and the other end is communicated with the water outlet cavity 140, so that the bottom end of the pressure relief hole 320 is sequentially communicated with the side-opening channel 330, the water passing channel 340 and the water outlet cavity 140. A third sealing ring 111 is provided between the outer side of the pressing plate 300 and the inner wall edge of the installation opening 110 of the valve seat 100.

[0037] The valve head includes a magnetic conductive bracket 400 arranged above the pressing plate 300 and an electromagnet assembly 500 arranged inside the magnetic conductive bracket 400. The electromagnet assembly 500 includes a skeleton 510 and a coil (not shown in the figure) wound around the outer side of the skeleton 510. A permanent magnet 520 is provided at the upper end of the skeleton 510. The end of the permanent magnet 520 contacts the top of the magnetic conductive bracket 400. A permanent magnet 520, a magnetic force ring 530, a first spring 540, an iron core 550 sleeved outside the first spring 540, and a rubber cap 560 are sequentially arranged in the skeleton 510 from top to bottom. The iron core 550 is movably arranged in the skeleton 510 and can drive the rubber cap 560 to switch between a closed state in which it fits with the pressure relief hole 320 and a communicated state in which it disengages from the pressure relief hole 320.

[0038] The diaphragm assembly 200 of this embodiment includes a diaphragm main body 210, a diaphragm bracket 220 and a diaphragm spring 230. The edge of the diaphragm main body 210 is pressed between the installation opening 110 of the valve seat 100 and the pressing plate 300. A clamping hole is formed on the diaphragm main body 210, and a clamping post is formed at the corresponding position of the diaphragm bracket 220. The diaphragm bracket 220 is fixed to the diaphragm main body 210 through the cooperation of the clamping post and the clamping hole. The diaphragm bracket 220 mainly plays a supporting role. The diaphragm main body 210, the diaphragm bracket 220 and the diaphragm spring 230 are coaxially arranged.

[0039] A first through hole is formed on the diaphragm main body 210 of this embodiment. The first through hole is arranged close to the first water inlet 131. The water inlet cavity 130 is communicated with the water passing cavity 310 through the first through hole. One end of the diaphragm spring 230 abuts against the inner wall of the water passing cavity 310, and the other end abuts against the diaphragm bracket 220. The diaphragm spring 230 is arranged close to the second water outlet 141. The diaphragm main body 210 is blocked at the second water outlet 141 by the elastic force provided by the diaphragm spring 230.

[0040] A pressure relief cavity 350 is formed between the pressure plate 300 and the framework 510, and the top end of the pressure relief hole 320 extends into the pressure relief cavity 350; a second through hole 360 is provided on the pressure plate 300, and the second through hole 360 is used to communicate the pressure relief cavity 350 with the water passing cavity 310. That is, the pressure relief cavity 350 is communicated with the water passing cavity 310 through the second through hole 360, and the water passing cavity 310 is communicated with the water inlet cavity 130 through the first through hole, so as to realize the communication between the pressure relief cavity 350 and the water inlet cavity 130.

[0041] Preferably, a cavity 511 for accommodating the permanent magnet 520, the magnetic ring 530, the first spring 540, the iron core 550 and the rubber cap 560 is provided inside the framework 510. A tubular structure 512 for extending the cavity 511 is formed at the lower end of the framework 510. A first sealing ring 513 is provided between the outer wall of the tubular structure 512 and the pressure plate 300; a second sealing ring 531 is provided between the magnetic ring 530 and the inner wall of the cavity 511. The first sealing ring 513 and the second sealing ring 531 are sealed to form the pressure relief cavity 350. In this embodiment, the pressure relief cavity 350 is a part of the cavity 511, that is, the first spring 540, the iron core 550 and the rubber cap 560 are located inside the pressure relief cavity 350. The iron core 550 can move inside the framework 510 and can drive the rubber cap 560 to move up and down. The rubber cap 560 is in contact with the pressure relief hole 320, and the present invention is in a closed state. The rubber cap 560 is separated from the pressure relief hole 320, and the present invention is in a communicating state.

[0042] A counterbore 551 for accommodating the first spring 540 is provided on the iron core 550. A water passing hole 552 is provided in the counterbore 551. A water passing groove is provided on the inner wall of the tubular structure 512, and the water passing groove is communicated with the water passing hole 552. In this embodiment, during the movement of the iron core 550, the water or gas in the counterbore 551 can be discharged to the water outlet 150 through the water passing hole 552 and the water passing groove, preventing the iron core 550 from being stuck.

[0043] The permanent magnet 520, the magnetic ring 530, the first spring 540, the iron core 550 and the rubber cap 560 are coaxially arranged and coincide with the central axis of the framework 510; a rubber coating layer for covering the coil is provided on the framework 510.

[0044] The working principle of the pulse solenoid valve is as follows: The permanent magnet 520 is arranged inside the magnetic conductive bracket 400. Under the action of the enhanced magnetic field of the permanent magnet 520 and the magnetic conductive bracket 400, the magnetic force ring 530 also forms a fixed magnetism. When a positive pulse signal passes through the coil, the iron core 550 is magnetized by the magnetic field generated by the coil and obtains magnetism (the magnetization effect of the permanent magnet 520 on the iron core 550 is much smaller than that of the coil on the iron core 550). At this time, the magnetism of the iron core 550 and the magnetism of the permanent magnet 520 attract each other with opposite poles. The iron core 550 drives the rubber cap 560 to disengage from the pressure relief hole 320, and the first spring 540 is compressed. The water inlet cavity 130, the water passing cavity 310, the pressure relief cavity 350 and the water outlet cavity 140 are connected. The water pressure in the water passing cavity 310 decreases. When the pressure in the water inlet cavity 130 is greater than the water pressure in the water passing cavity 310 and can overcome the elastic force of the diaphragm spring 230, it drives the diaphragm assembly 200 to move upward, keeping the water inlet 120 and the water outlet 150 unblocked. Water sprays out from below the diaphragm assembly 200. At this time, the pulse solenoid valve is in the open state;

[0045] When a negative pulse signal passes through the coil, the iron core 550 is magnetized by the magnetic field generated by the coil and obtains magnetism (the magnetization effect of the permanent magnet 520 on the iron core 550 is much smaller than that of the coil on the iron core 550). At this time, the magnetism of the iron core 550 and the magnetism of the permanent magnet 520 repel each other with the same poles. The iron core 550 drives the rubber cap 560 to act, making the rubber cap 560 fit with the pressure relief hole 320, cutting off the connection between the water inlet cavity 130, the water passing cavity 310, the pressure relief cavity 350 and the water outlet cavity 140. The water pressure in the water passing cavity 310 gradually increases, and under the pressure of the diaphragm spring 230, it drives the diaphragm assembly 200 to move downward to block the second water passing port 141, blocking the connection between the water inlet 120 and the water outlet 150. At this time, the pulse solenoid valve is in the closed state.

[0046] The pulse solenoid valve of this embodiment effectively utilizes sealing rings between the pressing plate 300 and the skeleton 510, and between the skeleton 510 and the magnetic ring 530 to form a flow-through channel, thus avoiding the design of complex diversion channels in the valve body and the valve head. It not only has a more compact structure, strong integrity between the valve body and the valve head, and is easy to assemble, but also is small in size, low in power consumption, and low in cost, capable of meeting the usage requirements of a tiny space, with good adaptability and versatility. At the same time, the pulse solenoid valve of this embodiment is provided with a side-opening channel 330 and a water-passing channel 340 at the bottom end of the pressure relief hole 320, guiding the bottom of the pressure relief hole 320 to the side of the pressing plate 300 and communicating with the water outlet cavity 140, so that the pressure relief channel and the diaphragm assembly 200 are independently arranged, avoiding interference and mutual influence between the two, and leaving a large amount of space in the water-passing cavity 310. Meanwhile, a diaphragm support 220 is arranged between the diaphragm body 210 and the diaphragm spring 230, further improving the stability of the diaphragm body 210, being beneficial to the opening and closing of the diaphragm body 210, enabling it to quickly respond to the change of water pressure and improving the sensitivity. A third sealing ring 111 is arranged between the pressing plate 300 and the inner wall of the valve seat 100 to seal the water-passing channel 340, which is simple in processing and good in sealing effect. Although some components and embodiments of this application have been illustrated and described, many modifications and changes (for example, changes in the size, dimensions, structure, shape and proportion, installation arrangement, material use, color, orientation, etc. of each component) can be conceived by those skilled in the art without actually departing from the scope and spirit of the claims.

[0047] Finally, it should be noted that the above-mentioned implementation manners are only the preferred implementation manners of the present invention, and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection required by the present invention.

Claims

1. A pulse solenoid valve, characterized in that: Including valve body and valve head; The valve body comprises a valve seat, a diaphragm assembly and a pressure plate; a mounting opening is provided on the valve seat; the diaphragm assembly is mounted on the mounting opening through the pressure plate; a water passage cavity is provided at one end of the pressure plate close to the mounting opening, a pressure relief hole is provided at the other end, and a side opening channel is provided at the bottom end of the pressure relief hole; a water passage channel is formed on the outer side of the pressure plate; the pressure relief hole is connected with the water passage channel through the side opening channel; The valve head includes a magnetic support arranged above the pressure plate and an electromagnet assembly arranged in the magnetic support, the electromagnet assembly includes a skeleton and a coil wound around the outside of the skeleton, a permanent magnet is provided at the upper end of the skeleton, and the end of the permanent magnet is in contact with the top of the magnetic support, and a permanent magnet, a magnetic ring, a first spring, an iron core sleeved on the outside of the first spring, and a rubber cap are arranged in the skeleton from top to bottom, the iron core is movably arranged in the skeleton, and can drive the rubber cap to switch between a closed state in contact with the pressure relief hole and a connected state detached from the pressure relief hole.

2. A pulse solenoid valve according to claim 1, characterized in that: The valve seat is provided with a water inlet, a water inlet chamber, a water outlet chamber and a water outlet in sequence; the water passage chamber is arranged between the water inlet chamber and the water outlet chamber; a first water passage is formed between the water passage chamber and the water inlet chamber, and a second water passage is formed between the water passage chamber and the water outlet; the top end of the pressure relief hole is connected with the water inlet chamber, and the bottom end of the pressure relief hole is connected with the water outlet chamber through a side opening channel and a water passage channel.

3. A pulse solenoid valve according to claim 2, characterized in that: The diaphragm assembly includes a diaphragm body, a diaphragm bracket and a diaphragm spring. The edge of the diaphragm body is pressed between the valve seat mounting port and the pressure plate. A clamping hole is formed on the diaphragm body, and a clamping column is formed at a corresponding position of the diaphragm bracket. The diaphragm bracket is fixed to the diaphragm body through the clamping column and the clamping hole. The diaphragm body, diaphragm bracket and diaphragm spring are coaxially arranged.

4. A pulse solenoid valve according to claim 3, characterized in that: A first through hole is provided on the diaphragm body, and the first through hole is arranged near the first water outlet, through which the water inlet chamber and the water outlet chamber are connected; one end of the diaphragm spring is abutted against the inner wall of the water outlet chamber, and the other end is abutted against the diaphragm bracket, and the diaphragm spring is arranged near the second water outlet, and the diaphragm body is sealed at the second water outlet by the elastic force provided by the diaphragm spring.

5. A pulse solenoid valve according to claim 4, characterized in that: A pressure relief chamber is formed between the pressure plate and the frame, and the top end of the pressure relief hole extends into the pressure relief chamber; a second through hole is provided on the pressure plate, and the second through hole is used to connect the pressure relief chamber with the water passage chamber.

6. A pulse solenoid valve according to claim 2, characterized in that: A filtering structure is arranged at the first water outlet.

7. A pulse solenoid valve according to claim 1, characterized in that: A third sealing ring is provided between the outer side of the pressure plate and the inner wall edge of the mounting opening of the valve seat.

8. A pulse solenoid valve according to claim 5, characterized in that: A cavity for accommodating the permanent magnet, the magnetic ring, the first spring, the iron core and the rubber cap is provided in the skeleton, a tubular structure for extending the cavity is formed at the lower end of the skeleton, a first sealing ring is provided between the outer wall of the tubular structure and the pressure plate; a second sealing ring is provided between the magnetic ring and the inner wall of the cavity, and the first sealing ring and the second sealing ring are sealed to form the pressure relief cavity.

9. A pulse solenoid valve according to claim 8, characterized in that: The iron core is provided with a countersunk hole for accommodating the first spring, the countersunk hole is provided with a water through hole, the inner wall of the tubular structure is provided with a water through groove, and the water through groove is communicated with the water through hole.

10. A pulse solenoid valve according to claim 9, characterized in that: The permanent magnet, magnetic ring, first spring, iron core and rubber cap are coaxially arranged and coincide with the central axis of the frame; a rubber coating layer for covering the coil is provided on the frame.

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