MINIATURED HIGH-PRESSURE SOLENOID VALVE

Abstract

A miniaturized high-pressure solenoid valve, the high-pressure solenoid valve comprising a metal coil frame (1), a solid iron core (2) attached to one end of the coil frame (1), and a coil winding (3) installed on the coil frame (1), wherein a threaded section (201) is provided at an end of the solid iron core (2) facing the coil frame (1), the threaded section (201) projecting into the coil frame (1) and being screwed to the coil frame (1), and wherein the ratio of a length (Ln) of a portion of the threaded section (201) projecting into the coil winding (3) to an axial length (L) of the coil winding is 1 / 5-1 / 3:1, wherein a first magnetic conductor (202) is provided at an end of the solid iron core (2) facing away from the threaded section (201), wherein an end facing away from the solid iron core (2) of the coil frame (1) is sheathed with a second magnetic conductor (5),wherein a thickness (N2) of the first magnetic conductor (202) and a thickness (N1) of the second magnetic conductor (5) are 1-3 mm, wherein a movable iron core (6) is slidably installed in the coil frame (1), wherein an outer surface of the movable iron core (6) is coated with a hard PTFE layer (601), wherein a spring (7) is provided between the movable iron core (6) and the threaded section (201), wherein the movable iron core (6) is inclined by the spring to always move away from the threaded section (201), wherein a valve body (8) is installed at an end of the second magnetic conductor (5) facing away from the coil frame (1), the valve body being provided with a medium outlet (801), wherein the fixed iron core (2) is provided with a medium inlet (203), wherein the medium outlet (801) and the medium inlet (203) are coaxial, characterized in that between the coil frame (1) and a first sealing ring (4) is installed on the solid iron core (2),wherein a second sealing ring (11) is installed between the second magnetic conductor (5) and the coil frame (1), and wherein a third sealing ring (12) is installed between the second magnetic conductor (5) and the valve body (8).

Description

TECHNICAL AREA

[0001] The present invention relates to the field of solenoid valves and in particular to a miniaturized high-pressure solenoid valve. STATE OF THE ART

[0002] Existing solenoid valve coils are generally wound around a plastic frame and then slid over a magnetically insulated tube assembly, after which a movable iron core is inserted into the cavity. This design, which has remained unchanged for decades, requires many accessories and has low strength. Additionally, conventional solenoid valves are T-shaped with a low inlet and high outlet, requiring a large installation space. These valves are limited to applications with specific weight, volume, and installation requirements in areas such as aerospace and deep-sea applications. Furthermore, achieving high pressure is a difficult challenge for small-volume, micro-power solenoid valves. Typically, such demanding components must be custom-designed by some international giants.Time, price, etc. are limited, so further action cannot be taken.

[0003] Existing high-pressure solenoid valves generally have a relatively high power rating. For the same CV (Circulation Volume Value), the higher the power rating, the higher the operating pressure. This high power rating leads to a significant temperature increase. To address the high temperature issue, the coil volume can only be increased. Some companies have developed low-power, high-thrust solenoid coils. However, a critical weakness of such solenoid valves is the considerable current draw during startup. In a premium device and a miniaturized spacecraft, a control unit is required to manage dozens of solenoid valves and several other components simultaneously. Currently, the capabilities of low-power, high-thrust solenoids are limited. A 5W coil can reach 500W during startup. Even though this only lasts 100ms, a high-power, high-current power supply is still necessary for support.Furthermore, a very high current is required when simultaneously operating ten or twenty solenoid valves and other components.

[0004] The main problem of how a solenoid coil can exert its maximum magnetic force is often neglected in state-of-the-art solenoid valves. To reduce volume, the thickness of the magnetic material around the magnetic field is often neglected, and thus the magnetically conductive distance is overlooked. The aim is always to increase power, resulting in an unpredictable temperature rise after just a few minutes of operation of the solenoid valve, which severely impairs the performance of the components surrounding the solenoid valve. CONTENT OF THE PRESENT INVENTION I. Technical problems to be solved

[0005] The object of the present invention is to provide a miniaturized high-pressure solenoid valve to overcome the weaknesses of the existing solenoid valve, such as complex structure, large volume, poor strength, small magnetic force and short service life, etc. II. Technical Solution

[0006] To solve this problem, the invention provides a miniaturized high-pressure solenoid valve. The high-pressure solenoid valve comprises a metal coil frame, a solid iron core attached to one end of the coil frame, and a coil winding installed on the coil frame. A threaded section is provided at one end of the solid iron core facing the coil frame. This threaded section projects into the coil frame and is screwed to it. The ratio of the length of the portion of the threaded section projecting into the coil winding to the axial length of the coil winding is 1 / 5 to 1 / 3:1. The inventive stainless steel coil frame is screwed to the solid iron core to increase its strength. Previously, plastic coil frames could not withstand high pressure.Even if the solenoid valve is switched on and off so frequently that the movable iron core repeatedly strikes the fixed iron core, the metal-to-metal connection can withstand the impact robustly.

[0007] Additionally, a first magnetic conductor is provided at one end of the solid iron core facing away from the threaded section, with a second magnetic conductor sheathing the other end of the coil frame facing away from the solid iron core. The thickness of the first magnetic conductor is 1-3 mm thick, while the thickness of the second magnetic conductor is encased in a second magnetic conductor. Components of sufficient thickness made of magnetically conductive material are placed at both ends of the coil frame. When the coil winding is energized to generate a magnetic field, the strongest magnetic force is directed towards the closer magnetic material. When the movable iron core is influenced by a magnetic force under the influence of the magnetic field, it is rapidly lifted so that it attracts the solid iron core, thus bringing the two into contact.Regarding the magnetic force, the thinner the magnet material at both ends of the coil frame, the lower the magnetic force. When the thickness of the magnet material is optimized, the magnetic energy can play its most significant role, thus considerably increasing the magnetic force and consequently the opening pressure of the solenoid valve.

[0008] It is further stipulated that the ratio of the length of the threaded section projecting into the coil winding to the axial length of the coil winding is 1 / 3:1. In an inventive embodiment with an optimal position of the attraction surface, the magnetic force is strongest when the attraction surface is positioned at 1 / 3 of the total height of the coil winding. Using a force-measuring device of the magnetic coil, it has been shown that, with an identical magnetic coil, the electromagnetic attraction force changes very significantly by continuously adjusting the position of the attraction surface. The attraction surface achieves its maximum magnetic force at 1 / 3 of the axial length of the coil winding, which considerably increases the final opening pressure of the solenoid valve.

[0009] Additionally, the coil frame is designed as a single piece, comprising a winding section around its outer circumference and a mounting bolt at one end. The inner wall of the winding section is coated with an insulating layer, which is a nanolayer. The coil winding is wound around this insulating layer, and the second magnetic conductor is slid onto the mounting bolt. The coil frame is made of stainless steel instead of plastic to improve its strength and increase its rigidity. Especially when the diameter of the enameled wire is relatively thick, the tension is particularly high to prevent the coil frame from cracking or deforming significantly, thus preventing changes to its overall size and structure.The surface of the stainless steel coil frame is coated with the nanolayer, so that the insulation performance meets the design requirements of the solenoid valve, allowing the enamelled wire to be wound directly around the coil frame, while still maintaining excellent electrical performance.

[0010] The distances between the stainless steel coil frame and the fixed and moving iron cores are very small. Without the existing magnet-insulated tube between them, the magnetic field can act directly on the magnetic material, resulting in a greater attraction force. It has been shown that, with the same power output, size, and ampere-turn rating, the magnetic field force acting on the moving iron core is significantly greater, approximately one-quarter, than that of a conventional coil.

[0011] Additionally, a movable iron core is slidably installed within the coil frame. The outer surface of this movable iron core is coated with a hard PTFE layer. A spring is positioned between the movable iron core and the threaded section, and the spring causes the movable iron core to always move away from the threaded section. When the liquid medium enters the solenoid valve chamber, an eddy current is generated under specific pressure and fluid conditions. This prevents high temperatures and excessive friction between the movable iron core and the coil frame caused by rapid rotation. This protects the solenoid valve chamber from damage and allows the movable iron core to move freely within the chamber.

[0012] Additionally, a valve body is installed at the end of the second magnetic conductor facing away from the coil frame. This valve body has a medium outlet, while the solid iron core has a medium inlet. The medium outlet and inlet are coaxial. With this coaxial design, the medium outlet and inlet of the solenoid valve are located on the same centerline. When the solenoid valve is used in confined spaces, it can be connected in parallel to a pipeline, which saves considerable space and facilitates integration of the entire device. The coaxial design also reduces the number of bends in the medium flow path. This coaxial direct-acting design offers a large opening flow rate and more stable switching performance.

[0013] Additionally, the outer surface of the coil winding is encased in a coil housing riveted to the solid iron core, thus locking the valve body, the second magnetic conductor, and the coil frame together. The overall size of the solenoid valve is significantly reduced by riveting the coil frame and all its components to the coil housing as a single unit. The previous method of disassembly and assembly is eliminated, resulting in a smaller solenoid valve volume.

[0014] Additionally, a wire exit of the coil winding is connected in series to a rectifier, which is designed to convert alternating current (AC) to direct current (DC). Due to the small size of the miniaturized solenoid valve, there is no room to install a copper ring on the contact surface of the solid iron core. Generally, DC is the predominant current. If AC is required, a bridge rectifier must be retrofitted to the wire exit to convert an external AC from the mains to DC. No noise is produced when the solenoid valve operates.

[0015] Additionally, it is provided that a first sealing ring is installed between the coil frame and the solid iron core, a second sealing ring is installed between the second magnetic conductor and the coil frame, and a third sealing ring is installed between the second magnetic conductor and the valve body.

[0016] Additionally, it is provided that an insert end of the valve body is inserted into the coil frame, wherein an inwardly projecting valve slot is provided at the insert end of the valve body, wherein a sealing plug is provided at an end of the movable iron core facing the valve slot, wherein a first passage and a second passage are provided in the movable iron core, and wherein the first passage is formed perpendicular to the second passage. III. Technical Advantages

[0017] A miniaturized high-pressure solenoid valve is provided, which offers the following advantages compared to the state of the art.

[0018] 1) With the inventive optimal position ratio of the attraction surface of the coil to the movable iron core, the two magnetic conductors have the best thickness under the influence of the coil's magnetic field, so that the solenoid valve coil can exert a maximum magnetic force for the same size and power, and the opening force of the solenoid valve is greater.

[0019] 2) The coil frame is sprayed with metal so that the enameled wire can be wound directly around the surface of the metal frame, ensuring not only good insulation performance but also reducing the distance between the coil winding and the movable iron core, and significantly increasing the attraction force.

[0020] 3) The conventional plastic coil frame is replaced with a metal coil frame, significantly improving its strength. After the coil frame is bolted to the fixed iron core, this effectively prevents upward impact forces caused by the attraction of the movable iron core. The problem of pressure resistance is also well solved, especially with high-pressure fluids.

[0021] 4) When the liquid medium enters the solenoid valve chamber, the movable iron core coated with PTFE film rotates rapidly within the solenoid valve chamber, which can effectively control the high temperature generated by rotating friction, thus maintaining optimal performance of the solenoid valve.

[0022] 5) The coaxial design of the medium inlet and outlet allows the solenoid valve to be connected in parallel to the pipeline, which saves a lot of space. The solenoid valve can be used freely in confined spaces. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 schematically shows a structure of the miniaturized high-pressure solenoid valve in the closed state according to the invention. Fig. Figure 2 schematically shows a structure of the miniaturized high-pressure solenoid valve in the closed state according to the invention. Fig. Figure 3 schematically shows a structure of the coil frame of the miniaturized high-pressure solenoid valve according to the invention. Fig. Figure 4 schematically shows a connection structure of the coil frame with the solid iron core and the second magnetic conductor of the miniaturized high-pressure solenoid valve according to the invention. Fig.Figure 5 schematically shows a structure of different insertion lengths of the threaded section of the miniaturized high-pressure solenoid valve according to the invention. Fig. Figure 6 shows a distribution of the magnetic force line of the miniaturized high-pressure solenoid valve according to the invention. Fig. Figure 7 schematically shows a connection structure between the coil frame and the movable iron core of the miniaturized high-pressure solenoid valve according to the invention. Fig. Figure 8 schematically shows a connection structure between the coil frame and the movable iron core of the miniaturized high-pressure solenoid valve according to the invention. Fig. Figure 9 schematically shows a structure of the rectifier of the miniaturized high-pressure solenoid valve according to the invention. Fig. Figure 10 schematically shows a structure of the miniaturized high-pressure solenoid valve according to the invention in operation. DETAILED DESCRIPTION

[0023] The embodiments of the invention are described in more detail below with reference to the drawings and exemplary embodiments. The following exemplary embodiments are used for explanation, but not to limit the invention.

[0024] As it is from Fig. 1 and Fig. As can be seen in Figure 9, the invention discloses a miniaturized high-pressure solenoid valve comprising a coil frame 1 made of metal, a solid iron core 2 attached to one end of the coil frame 1, and a coil winding 3 installed on the coil frame 1.

[0025] As it is from Fig. 1 and Fig.As can be seen in Figure 4, a threaded section 201 is provided at one end of the solid iron core 2 facing the coil frame 1. The threaded section 201 projects into the coil frame 1 and is screwed to it. The solid iron core 2 is screwed to the coil frame 1. The threaded connection between the two is secured with threadlocker. The rigid connection between the metal coil frame and the solid iron core is much stronger than that of the previous plastic frame. When the coil winding is energized, the movable iron core is rapidly forced upwards by the magnetic force. At this point, the solid iron core is very securely connected, capable of withstanding not only a static pressure of 20 MPa but also remaining undisturbed by repeated impacts.

[0026] As it is from Fig. 1, Fig. 4 and Fig.As can be seen in Figure 5, the ratio of the insertion length Ln of the portion of the threaded section 201 that projects into the coil winding 3 to the axial length L of the coil winding 3 is 1 / 5 to 1 / 3:1. Preferably, the ratio of the insertion length Ln of the portion of the threaded section 201 that projects into the coil winding 3 to the axial length L of the coil winding 3 is 1 / 3:1. Given the specified power rating, number of turns, and coil size, the most critical factor for a solenoid valve is how the solenoid valve exerts its maximum attraction force. After numerous tests on the magnetic force from various attraction positions, the position of the optimal attraction point with maximum attraction force was verified. Several attraction positions were tested. The results are shown in the following table. The table shows that the closing force is greatest when the ratio L / Ln is 1:1 / 3. Table 1: Attractive force at different insertion positions of the thread section Axial length of the coil winding Insertion length of the threaded section attraction L L1=1 / 5L 5N L2=1 / 4L 8N L3=1 / 3L 10N L4=1 / 2L 1N

[0027] As it is from Fig. 1, Fig. 4 and Fig.As can be seen in Figure 6, a first magnetic conductor 202 is provided at one end of the solid iron core 2 facing away from the threaded section 201. Another end of the coil frame 1 is sheathed with a second magnetic conductor 5. The thickness of the first magnetic conductor N2 and the thickness of the second magnetic conductor N1 are 1-3 mm. As shown in the distribution diagram of the magnetic force line, a magnetic conductor around the magnetic field generated by energizing the electromagnetic coil is necessary to form a complete distribution of the magnetic force line. The aforementioned optimal attraction position is one of the most effective methods for improving magnetic performance. At the same time, the optimal design of the thickness of the first and second magnetic conductors is also a measure for determining the magnetic force magnitude.When the thickness of the magnetic material reaches a certain value, the maximum magnetic performance can be achieved.

[0028] It can be seen from the distribution diagram of the magnetic field line that there is only a thin magnetic field line in the middle if no magnetically conductive material is provided at either end of the coil, whereas the direction of the coil's magnetic field line is clearly defined and the magnetic force is significantly increased when suitable magnetic conductors are placed above and below the coil. In the past, the position of the attraction point and the size of the magnetic conductor were determined only through experience, so the maximum magnetic performance was not effectively utilized.

[0029] It can be from Fig. 1 and Fig.Figure 3 shows that the coil frame 1 is formed in one piece, comprising a winding section 101 on one outer circumference and a mounting bolt 102 at one end. An inner wall of the winding section 101 is coated with an insulating layer 103, which is a nanolayer. The coil winding 3 is wound around the insulating layer 103. The second magnetic conductor 5 is pushed onto the mounting bolt 102. The coil frame is made of stainless steel, and its surface is coated with a nanolayer. A enamelled wire is wound layer by layer around the surface of the coil frame, so that the coil frame, the nanolayer, and the enamelled wire are integrated in one piece. Using the insulating layer, the coil winding is tested at insulation voltages of 900V, 1500V, and 2000V, meeting the requirements.It has been shown that the insulation performance of the metal frame with the nanolayer is excellent, comparable to that of the plastic insulator. Furthermore, the metal frame has good rigidity, high strength, and no deformation, etc. The plastic frame is replaced with the metal coil frame, thus eliminating the existing magnet-insulated tube. With the replacement metal frame, the coil winding is closer to the moving iron core. After testing, the magnetic attraction is increased to one-quarter of its original value. How... Fig. Figure 7 shows that H is the smaller distance between the coil winding and the movable iron core. The original coil frame, magnet-insulated tube, and movable iron core are replaced by the metal coil frame and movable iron core of the invention. The structure is simpler, and the magnetic force is greater.

[0030] It can be from Fig. 7 and Fig.Figure 8 shows that a movable iron core 6 is slidably installed in the coil frame 1. An outer surface of the movable iron core 6 is coated with a hard PTFE layer 601 (polytetrafluoroethylene). A spring 7 is installed between the movable iron core 6 and the threaded section 201, causing the movable iron core 6 to always tend to move away from the threaded section 201. When a liquid enters the solenoid valve interior, the solenoid valve is energized to lift the movable iron core.As the fluid flows through individual passages of the moving iron core via the valve slot, the moving iron core rotates rapidly as a medium flows in and out of the cyclical eddy current. This creates high-speed friction between the moving iron core and the interior of the frame, leading to high temperatures and material wear. Consequently, the service life of the solenoid valve cannot be guaranteed. If a high-pressure liquid medium has entered the valve, disassembly after use will reveal that the moving iron core is severely worn, jammed, or has produced a large quantity of iron shavings.In light of this phenomenon, a new process is carried out according to the invention, namely, a hard PTFE layer is coated on the surface of the movable iron core, so that the surface becomes smoother and friction between materials is significantly reduced. Additionally, the interior of the coil frame is also coated with a hard PTFE layer. This prevents damage to any component in the event of rapid rotation, while simultaneously reducing friction. The movable iron core can also move up and down more smoothly, which significantly improves work efficiency.

[0031] As it is from Fig.As can be seen in Figure 10, a valve body 8 is installed at a lateral end of the second magnetic conductor 5. A medium outlet 801 is provided on the valve body 8. A medium inlet 203 is provided on the solid iron core 2. The medium outlet 801 and the medium inlet 203 are coaxial. When the solenoid valve is used in scenarios with high weight and volume requirements, such as spacecraft, where the overall system weight is very high, the space must be compressed as much as possible. With the coaxial design of the invention, the solenoid valve can be connected in series between the first pipeline 13 and the second pipeline 14 and installed parallel to the medium line, thus significantly improving space utilization. Generally, the solenoid valve is installed perpendicular to the pipeline and occupies a relatively large space.The axial design can solve this problem very well.

[0032] As it is from Fig. As can be seen in Figure 1, the outer surface of the coil winding 3 is encased in a coil housing 9. The coil housing 9 is riveted to the solid iron core 2, so that the valve body 8, the second magnetic conductor 5, and the coil frame 1 are joined together. The coil frame and all components are riveted together as a single unit through the coil housing, thus significantly reducing the overall size of the solenoid valve. The previous method of disassembly and assembly is eliminated, resulting in a smaller volume for the solenoid valve.

[0033] As it is from Fig. 1 and Fig.As can be seen in Figure 9, a wire exit of the coil winding 3 is connected in series with a rectifier 10. The rectifier 10 is designed to convert alternating current into direct current. Due to the very small volume of the miniaturized high-pressure solenoid valve, all parts and components are precision-machined. Generally, the solenoid valve is operated with low-voltage DC. However, since the solenoid valve must also operate with alternating current, the rectifier is retrofitted to the wire exit of the coil so that the incoming AC current is directly converted into DC current after bridge rectification, thereby eliminating the necessary short-circuit ring in the conventional solenoid valve. The rectifier according to the invention is designed with a bridge rectifier consisting of four diodes, between which a capacitor is retrofitted to stabilize the rectified voltage.

[0034] Additionally, a first sealing ring 4 is installed between the coil frame 1 and the solid iron core 2. A second sealing ring 11 is installed between the second magnetic conductor 5 and the coil frame 1. A third sealing ring 12 is installed between the second magnetic conductor 5 and the valve body 8. This improves the sealing of the solenoid valve.

[0035] Additionally, one end of the valve body 8 projects into the coil frame 1. At the end of the valve body 8 that projects into the coil frame, an inwardly projecting valve slot 802 is provided. A sealing plug 602 is provided at one end of the movable iron core 6 facing the valve slot 802. The movable iron core 6 has a first passage 603 and a second passage 604, which are arranged perpendicular to each other.

[0036] In operation, the valve slot is compressed by the movable iron core using spring force, thus preventing the flow of the medium when the coil winding is switched off. When the coil winding is energized and thus generates a magnetic field, the spring force is overcome, and the movable iron core is drawn upwards until closed. The medium then flows from the outlet of the valve body, and the medium is connected.

[0037] This embodiment provides a miniaturized high-pressure solenoid valve in which a special spraying process is adopted and mechanics and fluidics are used flexibly to solve the problem of the solenoid valve being able to exert the maximum attraction force with a small volume, so that the miniaturized high-pressure solenoid valve can achieve a higher working pressure and overcome the shortcomings of the existing solenoid valve such as complex structure, large volume, poor strength, small magnetic force and short service life, etc.

[0038] The foregoing is only the preferred embodiment of the invention. It should be noted that a person skilled in the art can make several improvements and refinements without deviating from the technical principles of the invention. These improvements and refinements also fall within the scope of the invention. Reference symbol list: 1 spool frame 2 solid iron core 3 coil winding 4 first sealing ring 5 second magnetic conductor 6 movable iron core 7 spring 8 valve bodies 9 coil housings 10 rectifiers 11 second sealing ring 12 third sealing ring 13 first pipeline 14 second pipeline 101 Winding section 102 mounting bolts 103 Insulation layer 201 Thread section 202 first magnetic conductor 203 Media input 601 hard PTFE layer 602 sealing plugs 603 first round 604 second round 801 Medium output 802 Valve slot

Claims

[1] A miniaturized high-pressure solenoid valve, characterized by , that the high-pressure solenoid valve comprises a coil frame (1) made of metal, a solid iron core (2) attached to one end of the coil frame (1), and a coil winding (3) installed on the coil frame (1), wherein a threaded section (201) is provided at one end of the solid iron core (2) facing the coil frame (1), the threaded section (201) projecting into the coil frame (1) and being screwed to the coil frame (1), and wherein the ratio of a length (Ln) of a part of the threaded section (201) projecting into the coil winding (3) to an axial length (L) of the coil winding is 1 / 5-1 / 3:

1. [2] The miniaturized high-pressure solenoid valve according to claim 1, characterized by, that a first magnetic conductor (202) is provided at an end of the solid iron core (2) facing away from the threaded section (201), wherein an end of the coil frame (1) facing away from the solid iron core (2) is sheathed with a second magnetic conductor (5), and wherein the ratio of a thickness (N2) of the first magnetic conductor (202) to a thickness (N1) of the second magnetic conductor (5) is 1-3mm. [3] The miniaturized high-pressure solenoid valve according to claim 1, characterized by , that the ratio of the length (Ln) of the part of the threaded section (201) that projects into the coil winding (3) to the axial length (L) of the coil winding is 1 / 3:

1. [4] The miniaturized high-pressure solenoid valve according to claim 2, characterized by, that the coil frame (1) is formed in one piece, comprising a winding section (101) on an outer circumference and a mounting bolt (102) at one end, wherein an inner wall of the winding section (101) is sprayed with an insulating layer (103) which is a nanolayer, wherein the coil winding (3) is wound around the insulating layer (103), and wherein the second magnetic conductor (5) is pushed onto the mounting bolt (102). [5] The miniaturized high-pressure solenoid valve according to claim 2, characterized by , that a movable iron core (6) is slidably installed in the coil frame (1), wherein an outer surface of the movable iron core (6) is coated with a hard PTFE layer (601), wherein a spring (7) is provided between the movable iron core (6) and the threaded section (201), and wherein the movable iron core (6) is inclined by the spring to always move away from the threaded section (201). [6] The miniaturized high-pressure solenoid valve according to claim 5, characterized by , that a valve body (8) is installed at an end of the second magnetic conductor (5) facing away from the coil frame (1), the valve body being provided with a medium outlet (801), the solid iron core (2) being provided with a medium inlet (203), and the medium outlet (801) and the medium inlet (203) being coaxial. [7] The miniaturized high-pressure solenoid valve according to claim 6, characterized by , that an outer surface of the coil winding (3) is enclosed with a coil housing (9) which is riveted to the solid iron core (2) so that the valve body (8), the second magnetic conductor (5) and the coil frame (1) are locked to each other. [8] The miniaturized high-pressure solenoid valve according to claim 1, characterized by, that a wire exit of the coil winding (3) is connected in series with a rectifier (10), wherein the rectifier (10) is designed to convert alternating current into direct current. [9] The miniaturized high-pressure solenoid valve according to claim 6, characterized by , that a first sealing ring (4) is installed between the coil frame (1) and the solid iron core (2), wherein a second sealing ring (11) is installed between the second magnetic conductor (5) and the coil frame (1), and wherein a third sealing ring (12) is installed between the second magnetic conductor (5) and the valve body (8). [10] The miniaturized high-pressure solenoid valve according to claim 6, characterized by, that an insert end of the valve body (8) is inserted into the coil frame (1), wherein an inwardly projecting valve slot (802) is provided at the insert end of the valve body (8), wherein a sealing plug (602) is provided at an end of the movable iron core (6) facing the valve slot (802), wherein a first passage (603) and a second passage (604) are provided in the movable iron core (6), and wherein the first passage (603) is formed perpendicular to the second passage (604).

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