KR102474108B1 - A fuel cell solenoid valve having upper and lower dampers, and a fuel supply device including the same - Google Patents

Abstract

An embodiment of the present invention relates to a fuel cell solenoid valve having upper and lower dampers and a fuel supply device including the same. According to an embodiment of the present invention, the fuel cell solenoid valve comprises: a housing including an inlet, through which a fluid is introduced, a fluid flow path, in which the fluid flows, and an outlet, through which the fluid is discharged; a plunger arranged on the housing and moved to open/close the fluid flow path; a pilot arranged on a lower side of the plunger and opening/closing the fluid flow path, and having a penetrating flow path; a core shaft including the pilot and the plunger inside; a ring-shaped upper damper coupled to an upper side of the plunger; and a lower damper coupled to a lower side of the plunger to face the pilot. The plunger can include: an upper damper groove into which the upper damper is inserted; a lower damper groove into which the lower damper is inserted; and an upper flow path penetrating from the upper damper groove towards a side into one or more of an inner side and an outer side of the plunger. Therefore, the plunger can be prevented from deviating.

Description

A fuel cell solenoid valve having upper and lower dampers, and a fuel supply device including the same}

The embodiment relates to a solenoid valve for a fuel cell and a fuel supply device including the same. Specifically, the embodiment relates to a solenoid valve for a fuel cell having an upper and lower damper and a fuel supply device including the same.

Due to global warming, interest in environmental protection is increasing worldwide. Among them, air pollution, one of the causes of environmental pollution, is caused by various factors, and exhaust gas formed during the combustion of fossil fuels is pointed out as one factor.

Exhaust gas is mainly emitted from devices that use fossil fuel as the main fuel, such as automobiles, heating systems, and power generation facilities. In particular, most automobiles operate using power generated through fossil fuels such as gasoline and diesel. However, there is a problem of forming exhaust gases such as nitrogen oxides (NO _x ), carbon monoxide (CO), and fine dust in the process of burning the above-mentioned fossil fuels.

At this time, nitrogen oxides serve as precursors to form ozone (O ₃ ) and can cause acid rain, which can be fatal to the environment. In addition, nitrogen oxides can cause various skin diseases and respiratory diseases, which can be fatal to humans and various animals and plants. In addition, carbon monoxide is highly flammable and can be fatal because it can interfere with the supply of oxygen in the body by combining with hemoglobin in the human body. In addition, fine dust contains carbon, organic hydrocarbons, nitrates, harmful metal components, etc., and is very small in size and can enter the body, which can cause respiratory diseases.

Due to these problems, research on new eco-friendly vehicles is being conducted in terms of health and environmental protection. In particular, recently, research on a hydrogen fuel cell car that does not emit exhaust gas has been actively conducted.

A hydrogen fuel cell vehicle is a vehicle that uses the reverse reaction of electrolysis of water and uses electricity generated by an electrochemical reaction between hydrogen and oxygen as a power source. In general, a hydrogen fuel cell vehicle includes a fuel cell stack generating electricity through an electrochemical reaction, a hydrogen supply unit supplying hydrogen to the fuel cell stack, an air supply unit supplying oxygen to the fuel cell stack, and an electrochemical reaction between hydrogen and oxygen. It includes a discharge unit for discharging the water generated through the. In addition, the discharge unit includes a purge valve for managing the hydrogen concentration of the fuel electrode inside the fuel cell stack, a water trap for collecting and storing water discharged from the fuel electrode of the fuel cell stack, and a water level sensor for detecting and discharging water collected in the water trap. Includes sensors and drain valves, etc.

The hydrogen supply unit may include a hydrogen cut-off valve that receives or blocks hydrogen from the hydrogen tank, and may include a hydrogen supply valve disposed between the hydrogen cut-off valve and the fuel cell stack to control the amount of hydrogen supplied. . The hydrogen shut-off valve and the hydrogen supply valve may include a solenoid driving unit that controls a flow rate of the flowing fluid by opening or closing the valve by an applied power or adjusting an opening degree.

For example, when power is applied to the hydrogen cut-off valve, a plunger and a pilot rise according to the applied power, the hydrogen cut-off valve is opened, and the incoming fluid may be discharged to the hydrogen supply valve.

Meanwhile, the fuel supply device has a structure in which a solenoid valve for a fuel cell is assembled in a predetermined holder, and an insert injection damper is provided in a plunger in the solenoid valve for a fuel cell. According to the prior art, when surface treatment plating is performed on the surface of the plunger, it is difficult to manage the plating due to the insert injection damper, and the plating may peel off. In addition, since the noise reduction damper and the flow path blocking damper are integrally insert-injected inside the plunger, there is a problem that only the damper cannot be replaced. Accordingly, it is impossible to provide a structure capable of assembling the damper in the plunger.

According to the prior art, in the process of assembling the solenoid valve for a fuel cell to a holder, a plunger inserted into a predetermined yoke is separated. On the other hand, according to the internal technology, when a plunger separation prevention structure is formed or additionally arranged, a technical contradiction occurs that hinders the flow of fluid flowing into the pilot or plunger. In particular, the plunger separation prevention structure not only generates noise due to difficulties in the manufacturing process and friction with the fluid, but also swirls in the opposite direction to the mainstream by the rotational motion of the fluid in the fluid inlet as the plunger separation prevention structure interferes with the fluid flow. There is a technical problem that the flow performance is rapidly deteriorated due to the generation of phosphorus vortex. As the plunger separation prevention structure hinders the fluid flow, the valve may close when the fluid pressure drops below the minimum pressure difference. That is, the supply pressure is lowered due to fluid flow obstruction due to the plunger separation prevention structure, which may cause unnecessary blockage or may not operate properly.

Meanwhile, the solenoid valve for a fuel cell returns a plunger or a pilot by using the elastic force of an elastic member such as a lower spring. However, when power is applied and the plunger and the pilot move upward to supply fluid, the elastic member receives considerable pressure, and receives considerable pressure not only in the upward or downward direction but also in the lateral direction. However, in the internal technology, since the elastic member is only disposed below the core shaft, support in the lateral direction is not properly performed, so there is a problem in that the elastic member does not have a stable blocking operation due to the member of the side guide structure. In addition, in the solenoid valve for a fuel cell according to the internal technology, there is a problem in that the increase or decrease of the compression load of the spring cannot be responded to when necessary as the position where the elastic member is mounted is fixed to the lower part. In particular, when the compressive load of the spring increases more than necessary, the solenoid valve has a problem in that power consumption increases. In terms of power consumption, when the solenoid valve continuously consumes more than 2W of power, a technical problem occurs, and it is necessary to minimize power consumption.

One of the technical problems of the embodiment is to provide a solenoid valve for a fuel cell having a structure capable of assembling separate dampers inside the plunger and a fuel supply device including the same.

One of the technical problems of the embodiment is to provide a solenoid valve for a fuel cell having a ring-shaped upper damper in the upper groove of the plunger and a lower damper in the lower groove, and a fuel supply device including the same.

One of the technical problems of the embodiment is that the upper and lower grooves of the plunger are separated from each other, so that the upper damper and the lower damper are physically and spatially separated, and a solenoid valve for a fuel cell disposed so as not to overlap in the vertical direction, and a fuel supply including the same device can be provided.

One of the technical problems of the embodiment is to provide a solenoid valve for a fuel cell having an upper damper and a lower damper of a plunger of a solenoid valve having an opening groove for relieving internal pressure or/and an upper flow path, and a fuel supply device including the same.

One of the technical problems of the embodiment is to provide a solenoid valve for a fuel cell in which an elastic member is coupled to an upper portion of a plunger of the solenoid valve, and a fuel supply device including the same.

One of the technical problems of the embodiment is to provide a solenoid valve for a fuel cell having a plunger guide with excellent fluid flow and durability capable of preventing plunger escape without disturbing the flow of an inflowing fluid and a fuel supply device including the same. It is Ham.

The technical problems of the embodiments are not limited to those described in this section, but include those that can be grasped through the description of the invention.

A solenoid valve for a fuel cell according to an embodiment includes a housing including an inlet through which fluid flows, a fluid passage through which the fluid flows, and an outlet through which the fluid is discharged; a plunger disposed on the housing and moved to open and close the fluid passage; a pilot disposed below the plunger, opening and closing the fluid passage, and having a through passage; a core shaft in which the pilot and the plunger are disposed; a ring-shaped upper damper coupled to an upper portion of the plunger; and a lower damper coupled to a lower portion of the plunger to face the pilot, wherein the plunger includes an upper damper groove into which the upper damper is inserted; a lower damper groove into which the lower damper is inserted; and an upper passage passing through at least one of an inner side and an outer side of the plunger in a lateral direction from the upper damper groove.

According to an embodiment of the present invention, the upper damper and the lower damper are separately separated, and may include an elastic member coupled to an upper inner side of the plunger and an upper inner groove into which the elastic member is inserted into the upper portion of the plunger have.

According to an embodiment of the present invention, the plunger may include a middle passage connected to the upper inner groove in a lateral direction and a lower passage disposed outside the pilot.

According to an embodiment of the present invention, the upper inner groove has a ring shape, the upper passage is connected to one side and the other side of the upper inner groove, and the upper damper includes a plurality of first press-fit protrusions protruding from an outer circumferential surface; And it may include an upper part having a convex curved surface on the upper part.

According to an embodiment of the present invention, the upper passage is connected to at least one of the outer side of the plunger or the upper opening groove, and the maximum length from the upper side of the plunger to the lower end of the upper passage is the distance to the lower end of the upper damper can be bigger

According to an embodiment of the present invention, the pilot cap disposed on the lower outer circumferential surface of the plunger and bent to the lower circumference of the pilot; and a plunger guide coupled to a lower inner side of the core shaft and surrounding the pilot cap, wherein the plunger guide may include a plurality of inner protrusions protruding downward from the pilot cap.

A fuel supply device according to an embodiment of the present invention includes a housing including an inlet through which fluid flows, a fluid passage through which the fluid flows, and an outlet through which the fluid is discharged; a cover member disposed above the housing; a plunger disposed between the housing and the cover member and moved to open and close the fluid passage; a solenoid driver disposed inside the cover member and reciprocating the plunger in a vertical direction; a pilot disposed below the plunger, opening and closing the fluid passage, and having a through passage; a core shaft in which the pilot and the plunger are disposed; an upper damper and an elastic member coupled to an upper portion of the plunger; and a lower damper coupled to a lower portion of the plunger to face the pilot and physically separated from the upper damper, wherein the upper damper has a ring shape and is disposed in an area that does not overlap with the lower damper in a vertical direction, The plunger includes an upper damper groove into which the upper damper is inserted; a lower damper groove into which the lower damper is inserted; and an upper passage passing through at least one of an inner side and an outer side of the plunger in a lateral direction from the upper damper groove.

A fuel supply device according to an embodiment may include the above-described solenoid valve for a fuel cell.

According to the embodiment, there is an effect of coupling or separating different dampers 1210 and 1220 inside the plunger 1330.

According to the embodiment, internal pressure generation due to assembly of the upper damper 1210 and the lower damper 1220 is removed inside the plunger 1330 and press-fit protrusions are formed, so that the damper can be easily press-fitted and separated. Can be prevented.

According to the embodiment, by providing at least one opening groove or / and a lateral upper flow path to relieve the internal pressure generated when the plunger 1330 presses the upper damper 1210, the upper damper 1210 It is possible to equalize the internal/external pressure according to the insertion of the damper and prevent the upper damper from escaping.

According to the embodiment, by coupling the elastic member 1360 to the inside and the upper damper 1210 to the outside at the top of the plunger 1330, the plunger can move up and down and reduce noise.

According to the embodiment, since the upper and lower dampers are separated and coupled, plating on the surface of the plunger 1210 is easy and the problem of peeling of the plating can be suppressed.

According to the embodiment, since the plunger guide is coupled to the lower outer side of the plunger 1210, there is a technical effect of preventing the plunger from leaving without interfering with the flow of the introduced fluid.

The technical effects of the embodiments are not limited to those described in this section, but include those that can be grasped through the description of the invention.

1 is a perspective view of a solenoid valve 2000 according to an embodiment.
FIG. 2 is a cross-sectional view of the solenoid valve 2000 of FIG. 1 on the A1-A1' side.
FIG. 3 is an exploded perspective view of the solenoid valve 2000 of FIG. 1 .
FIG. 4 is a partially enlarged view of the solenoid valve 2000 of FIG. 2 .
FIG. 5 is a B1-B1′ side cross-sectional view of the solenoid valve 2000 of FIG. 1 .
FIG. 6 is a perspective view of the upper damper 1210, the guide member 1340, and the core shaft 1320 coupled to the upper and outer sides of the plunger 1330 in FIG. 3 before coupling.
FIG. 7 is an exploded perspective view showing the upper damper 1210 and the lower damper 1220 of the plunger 1330 in FIG. 3 .
8(A)(B) are perspective views of the upper damper 1210 and the lower damper 1220 of FIG. 7 .
FIG. 9 is a side cross-sectional view illustrating coupling of the plunger 1330, the upper damper 1210, and the elastic member 1360 in FIG. 2 .
10 is another example of the plunger of FIG. 9 having an upper passage.
11 is a partially enlarged view of the plunger of FIG. 10;
12 is an exploded perspective view of the plunger, guide member, and pilot cap of FIG. 10;
13 to 15 are modified examples of the upper passage of the plunger in FIG. 10 .
16 is an example in which an intermediate passage of a plunger is removed in an embodiment and a modified example of the present invention.
17 is a cross-sectional view of the coupled side of the lower damper 1220 of the plunger and the pilot 1370 in FIG. 2 .
FIG. 18 is a perspective view of the bottom surface of the guide member 1340, the lower O-ring 1327, the plunger guide 1390, and the pilot cap 1380 disposed below the core shaft 1320 in FIG. 2 .
19 is a side view of the plunger guide 1390 of FIG. 18 .
FIG. 20 is a view showing a coupled upper surface of the plunger 1330, the guide member 1340, the lower O-ring 1327, the plunger guide 1390, and the pilot cap 1380 of FIG.
21 is a right perspective view of a partial perspective view of the solenoid valve of FIG. 1;
22 is a perspective view of a vehicle 3000 to which a solenoid valve 2000 for a fuel cell according to an embodiment is applied.

Hereinafter, a preferred embodiment capable of solving the technical problems of the embodiment will be described in detail with reference to the accompanying drawings. However, the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in a variety of different forms, and if it is within the scope of the technical idea of the present invention, one or more of the components among the embodiments can be selectively implemented. can be used by combining and substituting.

Terms (including technical and scientific terms) used in the embodiments of the present invention, unless explicitly specifically defined and described, have meanings that can be generally understood by those skilled in the art to which the present invention belongs. The meaning of commonly used terms, such as terms defined in a dictionary, can be interpreted in consideration of the contextual meaning of related technology. Terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when described as “and (and) at least one (or more than one) of B and C”, the combination of A, B, and C is possible. may include one or more of all possible combinations. In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the term is not limited to the nature, order, or order of the corresponding component. And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected to, combined with, or connected to the other component, but also with the component. It may also include the case of being 'connected', 'combined', or 'connected' due to another component between the other components.

In addition, when it is described as being formed or disposed on the "top (above) or bottom (bottom)" of each component, the top (top) or bottom (bottom) is not only a case where two components are in direct contact with each other, but also one A case in which another component above is formed or disposed between two components is also included. In addition, when expressed as “up (up) or down (down)”, it may include the meaning of not only the upward direction but also the downward direction based on one component.

(Example)

1 is a perspective view of a solenoid valve 2000 according to an embodiment, FIG. 2 is an A1-A1' side sectional view of the solenoid valve 2000 of FIG. 1, and FIG. 3 is an exploded perspective view of the solenoid valve 2000 of FIG. 4 is a partially enlarged view of the solenoid valve 2000 of FIG. 2, and FIG. 5 is a B1-B1' side cross-sectional view of the solenoid valve 2000 of FIG. Hereinafter, the 'solenoid valve 2000 for a fuel cell having an upper and lower damper' will be simply referred to as a 'solenoid valve 2000 according to an embodiment'.

1 to 5 , the solenoid valve 2000 according to the embodiment may be connected to a hydrogen tank (not shown). For example, the fuel cell solenoid valve 2000 may be disposed between a hydrogen tank and a fuel cell stack (not shown). For example, the solenoid valve 2000 according to the embodiment may be a hydrogen shutoff valve disposed between a hydrogen tank and a hydrogen supply valve (not shown), but is not limited thereto.

The solenoid valve 2000 may include a housing 1100 and a cover member 1400. The housing 1100 may be referred to as a holder, but is not limited thereto. The housing 1100 may be disposed between the hydrogen tank and the fuel cell stack. For example, the housing 1100 may be disposed between a hydrogen tank and a hydrogen supply valve.

The housing 1100 may include a material having a predetermined strength and excellent reliability. For example, the housing 1100 may be a resin material including a metal or thermoplastic resin material. For example, the housing 1100 may include polypropylene resin, polyethylene resin, polyolefin resin, polycarbonate resin, ABS (acrylonitrile butadiene styrene copolymer) resin, TPU (thermoplastic urethane) Resin, polyamide (Polyamide) resin, PPA (Polyphthalamide) resin, PPS (Polyphenylene sulfide) resin, PEEK (Polyether ether ketone) resin, and LCP (Liquid Crystal Polymer) resin may include at least one resin material.

As the housing 1100 includes a resin material, it may have improved moldability. For example, the housing 1100 may be formed by various injection processes such as double injection molding and insert injection molding, and may be provided in various sizes and shapes to have improved design freedom.

The cover member 1400 may be disposed on the housing 1100 . The cover member 1400 may include an open lower area and may include an accommodation space therein. The solenoid driver 1300 (see FIGS. 2 and 4 ) described below may be inserted through the lower region of the cover member 1400 and disposed in the accommodation space.

The cover member 1400 may include a material having a predetermined strength and excellent reliability against an external environment. For example, the cover member 1400 may include at least one of metal, ceramic, and resin. In detail, when the cover member 1400 includes a resin material, it may include a thermoplastic resin, and any one of the resin materials of the housing 1100 may be employed.

The cover member 1400 may be coupled to the housing 1100 by a fastening member 1500 . The fastening member 1500 is a screw, bolt, etc. type, and waterproof rubber may be disposed on the surface. The cover member 1400 can prevent the solenoid driving unit 1300 from being exposed to the outside while fixing the solenoid driving unit 1300 to a set position.

The solenoid valve 2000 includes a housing 1100, a cover member 1400 disposed on the housing 1100, a core shaft 1320 disposed between the housing 1100 and the cover member 1400, and a plunger. 1330, a pilot 1370, and a solenoid driver 1300. The solenoid driving unit 1300 may include a coil unit 1310 and a yoke 1305. The upper protrusion 1325 of the core shaft 1320 may be coupled to the inner groove structure of the cover member 1400 through the inner hole of the yoke 1305 .

The housing 1100 may include an inlet 1101 and an outlet 1102 of fluid. A fluid passage 1103 through which fluid moves may be disposed at a lower end of the pilot 1370 between the inlet 1101 and the outlet 1102 . Also, the pilot 1370 of the embodiment may include a through passage 1371 therein. The through channel 1371 is formed in a vertical direction, may be an orifice hole, and may have an upper diameter smaller than a lower diameter. The inlet 1101 is an inlet through which fluid is introduced and may be connected to a hydrogen tank. In addition, when the fuel cell solenoid valve 2000 is disposed between the hydrogen tank and the hydrogen supply valve, the inlet 1101 may be connected to the hydrogen tank, and the outlet 1102 may be connected to the inlet of the hydrogen supply valve. have.

A plurality of outlets 1102 may be disposed, and may be disposed in directions opposite to or orthogonal to the inlets 1101 . The inlet 1101 and the outlet 1102 are spaced apart from each other and may be disposed on an outer surface of the housing 1100 . For example, the inlet 1101 and the outlet 1102 may be disposed on different outer surfaces of the housing 1100 .

Here, the fluid introduced through the inlet 1101 may flow through the fuel cell solenoid valve 2000 and then pass through the fluid passage 1103 and be discharged through the outlet 1102 .

Next, the solenoid valve 2000 according to the embodiment can control the positions of the plunger 1330 and the pilot 1370 by power applied from the terminal 1301, and can selectively open and close the fluid passage 1103. have. In an embodiment, the coil unit 1310 may include a bobbin 1311 and a coil 1312. The bobbin 1311 may include a hollow extending in a vertical direction therein. The hollow of the bobbin 1311 may be a through hole penetrating the upper and lower surfaces of the bobbin 1311 . A core shaft 1320 and a plunger 1330 may be disposed in the hollow of the bobbin 1311 .

The coil 1312 may be disposed on the bobbin 1311 . The coil 1312 may be disposed around an outer circumference of the bobbin 1311 . The coil 1312 may be wound and disposed outside the bobbin 1311 . The coil 1312 may form a magnetic field according to applied power.

The core shaft 1320 may be disposed within the coil part 1310 . The core shaft 1320 may be disposed within the bobbin 1311 . A portion of the core shaft 1320 may be disposed by being inserted into the hollow of the bobbin 1311 . The core shaft 1320 includes a magnetic material and may be magnetized by a magnetic field formed by the coil part 1310 .

The plunger 1330 may be disposed in the hollow R1 of the core shaft 1320 and move up and down in a vertical direction. The plunger 1330 may be movable in a vertical direction or a vertical direction by magnetic force of the core shaft 1320, and accordingly, the through passage 1371 of the pilot 1370 may be opened and closed. Also, when the pilot 1370 is completely moved, the fluid passage 1103 can be selectively opened and closed while the pilot 1370 coupled to the lower side of the plunger 1330 moves up and down.

The pilot 1370 is formed of an elastic material and may include an opening/closing member 1372 capable of opening and closing the fluid passage 1103 . For example, the opening/closing member 1372 may be formed of a resin material such as polyvinyl chloride, silicone, polyurethane, EPDM (Ethylene Propylene), NBR (Nitrile Butadiene Rubber), FPM (Fluorinated Rubber), silicone, or an elastic rubber material. may include at least one of them.

The opening/closing member 1372 may be disposed to be inserted into a central region of the lower surface of the pilot 1370 . For example, when the solenoid driving unit 1300 does not operate (power is off), attractive force may not be generated between the core shaft 1320 and the plunger 1330. Accordingly, the opening/closing member 1372 may contact and elastically deform the upper end of the fluid passage 1103 by the elastic force of the elastic member 1360, and the solenoid valve 2000 may be closed.

When the solenoid driver 1300 operates and the core shaft 1320 is magnetized (power is on), the plunger 1330 moves upward so that the opening/closing member 1372 under the pilot 1370 opens the fluid It may be spaced apart from the upper end of the passage 1103. Accordingly, the solenoid valve 2000 is opened so that the fluid can be discharged through the outlet 1102 via the fluid passage 1103 .

When the current is cut off, both the plunger 1330 and the pilot 1370 are kept in a downwardly moved state by the supply pressure. Accordingly, the through passage 1371 inside the pilot 1370 remains blocked.

When current is supplied, the solenoid driver 1300 is driven, and accordingly, the plunger 1330 moves in a vertical up direction, and accordingly, the lower damper 1220 of the plunger 1330 and the pilot 1370 are separated Then, the fluid moves through the through passage 1371 of the pilot 1370, and the moved fluid can be discharged through the outlet 1102. Here, the pressure of the fluid discharged through the fluid outlet 1102 is lower than the pressure of the fluid introduced into the fluid inlet 1101 . Then, when the plunger 1330 completely rises together with the pilot 1370, the fluid flowing into the fluid inlet 1101 is simultaneously discharged through the through passage 1371 and the fluid passage 1103 of the pilot 1370, The pressure of the fluid flowing into the fluid inlet 1101 and the pressure of the fluid discharged into the fluid passage 1103 may be the same.

The housing 1100 may include an O-ring 1327 at a fluid inlet 1101, an outlet 1102, or a lower side of the core shaft 1320. The O-ring 1327 is disposed in the ring-shaped groove R5 disposed around the inner opening/closing space R10 (FIG. 3) of the housing 1100, and moves along the housing 1100 according to the movement of the plunger 1330. It is possible to block fluid flow between the cover member 1400 and the cover member 1400 . The O-ring 1327 may be implemented as a single ring or a double ring.

The plunger 1330 may be disposed in the hollow R1 of the core shaft 1320. A lower portion of the hollow R1 may be open. A concave recess 1326 (FIG. 9) is disposed at the inner center of the hollow R1 of the core shaft 1320, and the center of the upper inner groove R2 is aligned with the recess 1326 as a reference. can

As shown in FIGS. 4 to 9 , the embodiment of the present invention may include a plurality of dampers 1210 and 1220 inside the plunger 1330 . In an embodiment of the invention, one side or upper surface of the plunger 1330 is provided with any one of the plurality of dampers 1210 and 1220 and an elastic member 1360, and another damper may be provided at the other side or lower side. The plunger 1330 may have a structure in which a plurality of dampers 1210 and 1220 may be separately coupled or separated. In addition, the plunger 1330 may have a structure in which the elastic member 1360 may be coupled or separated from the inside or outside of one damper.

The plunger 1330 may include an upper damper 1210 and an elastic member 1360 or be combined therewith. The plunger 1330 may include or be combined with a lower damper 1220 and a pilot 1370 at a lower portion.

According to the embodiment, when the solenoid is operated, operating noise is generated due to contact between the plunger 1330 and the core shaft 1320, and an upper damper 1210 separately coupled to the top of the plunger 1330 is provided to reduce noise. can The upper damper 1210 may be coupled or separated from the plunger 1330.

According to the embodiment, an elastic member 1360 that is compressed or restored when the plunger 1330 moves in the vertical up/down direction when the solenoid is operated may be provided inside the upper damper 1210.

According to the embodiment, in order to open and close between the plunger 1330 and the pilot 1370 when the solenoid is operated, the lower damper 1220 can be coupled to the lower part of the plunger 1330 so as to correspond to the pilot 1370. have. The lower damper 1220 may be coupled or separated from the lower portion of the plunger 1330 .

The upper damper 1210 and the lower damper 1220 may be physically separated and spatially separated. The upper damper 1210 and the lower damper 1220 may not overlap in a vertical direction. Areas where the lower damper 1220 and the elastic member 1360 are disposed may overlap each other in a vertical direction. As another example, the upper damper 1210 and the lower damper 1220 may overlap in a vertical direction.

6 to 9 , the plunger 1330 may include an upper inner groove R2 and an upper damper groove R3 disposed on an outer circumference of the upper inner groove R2. The elastic member 1360 may be inserted into the upper inner groove R3. The inner groove R2 is formed on the upper surface of the plunger 1330 to a first predetermined depth D0, and its diameters D1 and D2 may be larger than the outer diameter of the elastic member 1360. An upper diameter D2 of the upper inner groove R2 may be greater than a lower diameter D1. Diameters D1 and D2 of the upper inner groove R2 may gradually increase from the middle passage R4 toward the top. The structure of the upper inner groove R2 facilitates insertion of the elastic member 1360, supports the elastic member 1360 at the bottom of the upper inner groove R2 or minimizes flow, and the upper inner groove By enabling the elastic member 1360 to flow at the upper part of the groove R2, a range covered by the elastic member 1360 is provided and a restoration direction can be facilitated. The upper inner groove R2 may overlap the lower damper groove R6 in a vertical direction.

Since the elastic member 1360 is coupled to be accommodated inside the top of the plunger 1330, the up/down movement of the plunger 1330 and the compression/restoration of the elastic member 1360 can proceed almost simultaneously. , which can reduce power consumption.

The elastic member 1360 may be elastically deformable in an upward or downward direction. For example, the elastic member 1360 may include a coil spring or the like. When the plunger 1330 moves upward by the applied driving force, the elastic member 1360 may be compressed to open the fluid passage 1103 . In addition, when the driving force is not applied, the elastic member 1360 may be restored and push the pilot 1370 coupled with the plunger 1330 downward to close the fluid passage 1103 .

Here, the upper inner groove R2 may be connected to the middle passage R4. The intermediate passage R4 may be spaced apart from the upper damper groove R3 at a lower portion of the upper damper groove R3. The intermediate passage R4 may pass through different side surfaces of the plunger 1330 and may be connected to a lower part of the upper inner groove R2. For example, the middle passage R4 may be passed through in a horizontal left/right or front/back direction, and the height of one end and the other end of the middle passage R4 may be the same or different from the upper surface of the plunger 1330. have. The intermediate flow path R4 may be formed to match the internal pressure around the plunger 1330, and may be provided as a flow path through which moisture may flow out when generated.

The upper damper 1210 may be provided in a ring shape having an opening 13 penetrating the inside. The upper damper 1210 may be coupled to the upper damper groove R3. The upper damper 1210 has at least one first press-fitting protrusion 12 around it, and the first press-fitting protrusion 12 forms the upper damper groove R3 when the upper damper 1210 is coupled. can be pressed by The first press-fit protrusion 12 may protrude in a ring shape on the outer circumferential surface of the upper damper 1210 and may be disposed in a ring shape or two or more rings. An inner circumferential surface of the upper damper 1210 may be provided as a flat curved surface without protrusions. As another example, the first press-in protrusion 12 may protrude in a ring shape on the inner periphery of the upper damper 1210, and may be provided in one or two or more ring shapes. As another example, the first press-in protrusion 12 may be provided as one ring or two or more rings on each of the inner and outer circumferential surfaces of the upper damper 1210 . The first press-in protrusion 12 may protrude in a screw line shape.

The outer diameter of the upper damper groove R3 may be smaller than that of the upper damper 1210, so that the upper damper 1210 may be press-fitted. The inner diameter of the upper damper groove R3 may be larger than the inner diameter of the upper damper 1210, so that the upper damper 1210 may come into close contact with it. Accordingly, separation of the upper damper 1210 may be prevented.

Here, the upper damper 1210 has a first opening groove 11 in a vertical direction, and the number of first opening grooves 11 may be one or two or more. For example, the two or more first opening grooves 11 may be used as passages through which air flows in or out when the upper damper 1210 is press-fitted.

The upper damper 1210 may have an upper part 14 having a convex curved surface, and the upper part 14 having a convex curved surface may suppress contact noise when in contact with the inner surface of the core shaft 1320. have. The upper part 14 of the upper damper 1210 may be provided with a wider width than the lower part, and may be provided with a width limiting insertion of the upper damper 1210. The upper damper 1210 having a curved upper part 14 according to the embodiment can secure a plunger area (magnetic force generating area) while securing a damper area for noise reduction, solenoid suction power There is a special technical effect capable of increasing . In addition, horizontal deformation is possible by the curved upper part 14, so as the contact area and contact time increase, the operating noise is reduced for the same impact amount, and the movement distance of the plunger 1330 is secured, while the magnetic force generation area There are complex technical effects that can secure the plunger area.

The upper damper groove R3 may be provided in a ring shape when viewed from a top view. The second depth D3 of the upper damper groove R3 may be provided to a lower depth than the lower end of the upper damper 1210 . That is, the distance D4 from the upper surface of the plunger 1330 to the lower end of the upper damper 1210 may be smaller than the second depth D3 of the upper damper groove R3. The thickness of the upper damper 1210 may be provided in a range of 3 mm to 6 mm or 4 mm to 5 mm. The second depth D3 of the upper damper groove R3 may be smaller than the first depth D0 of the upper inner groove R2 into which the elastic member 1360 is inserted, for example, the upper inner groove R2 30% or more of the first depth D0 of, for example, 30% to 70% or 30% to 60% of the range, it is possible to prevent a decrease in the stiffness of the plunger 1330.

7 and 20 , when the upper damper 1210 is inserted into the upper damper groove R3, the first opening groove 11 may be exposed to the upper portion. The first opening groove 11 may be formed to pass through the outer sides of the ring-shaped first press-in projection 12 and the upper portion 14 . Since the first opening groove 11 is open at the top, internal pressure can be removed when the upper damper 1210 is inserted, and the inside of the groove R3 into which the upper damper 1210 is inserted and the plunger 1330 The pressure in the outer space may be the same. Accordingly, separation of the upper damper 1210 may be suppressed.

As shown in FIGS. 7, 8(B) and 17, the plunger 1330 has a lower damper groove R6, and the lower damper groove R6 is located above the space where the pilot 1370 is inserted. can be placed. The lower damper groove R6 may be formed as a concave recess, and the lower damper 1220 may be inserted, coupled, and separated. The lower damper 1220 may have a second press-in projection 22 disposed on an outer circumferential surface. The second press-in projection 22 may be provided in a ring shape or two or more ring shapes. The second press-in protrusion 22 may be provided in a screw shape.

The number of the first press-fit protrusions 12 may be greater than the number of the second press-fit protrusions 22 . Also, the second depth D3 of the upper damper groove R3 may be greater than the third depth of the lower damper groove R6. The third depth of the lower damper groove R6 may be a depth at a location on the upper surface of the pilot 1370 .

The outer diameter of the second press-in protrusion 22 of the lower damper 1220 may be larger than the inner diameter of the lower damper groove R6, so that the lower damper 1220 may be press-fitted into the lower damper groove R6. Accordingly, separation of the lower damper 1220 may be prevented. The upper surface 23 of the lower damper 1220 is flat, and its circumference is provided in a curved shape, so that it is easy to insert into the lower damper groove R6 and the damper can be inserted to a deeper depth.

The lower damper 1220 has a second opening groove 21 on the outside, and the second opening groove 22 extends from the outer lower surface of the lower damper 1220 to the upper surface, and serves as a passage through which fluid passes It can be. The second opening groove 22 may be formed through the second press-fitting protrusion 22 and may be disposed around the lower damper 1220 in one or two or more. Since the second opening groove 21 is exposed to the lower portion of the lower damper 1220, internal pressure can be removed when the lower damper 1220 is inserted, and the lower damper 1220 is inserted into the groove R6 The pressure of the inner space and the outer space of the plunger 1330 may be the same. Accordingly, separation of the lower damper 1220 may be suppressed.

An outer diameter of the upper damper 1210 may be larger than an outer diameter of the lower damper 1220 . An inner diameter of the upper damper 1210 may be larger than an outer diameter of the lower damper 1220 . A thickness of the upper damper 1210 may be greater than a thickness of the lower damper 1220 .

Here, a protrusion P1 for preventing separation may be disposed around the inlet side of the lower damper groove R6. The separation prevention protrusion P1 protrudes toward the center of the lower damper groove R6, and may include one or more, or may be formed in a ring shape. The separation prevention protrusion P1 may be coupled to the lower stepped groove C1 of the lower damper 1220 . Accordingly, the lower damper 1220 may be prevented from being disengaged in the lower direction by the disengagement preventing protrusion P1.

Conventionally, the damper is integrally formed from top to bottom in the plunger 1330 by an insert injection method, so it is not easy to plate the surface of the plunger 1330 by the insert injection method, and the plating is peeled off or in the non-plating area. There is a problem of corrosion. In an embodiment of the present invention, the surface of the plunger 1330 can be plated in advance by coupling the separately separated dampers 1210 and 1220 to the upper and lower parts of the plunger 1330, and the non-plating area according to the insert injection method This does not exist, and the problem of peeling off of the plating can be prevented. In addition, it may be easy to combine, separate, or replace the separately separated dampers 1210 and 1220, respectively.

In addition, by disposing the elastic member 1360 above the plunger 1330, a space around the lower portion of the plunger 1330 may be reduced. For example, conventionally, by further disposing an elastic member between the lower periphery of the plunger 1330, for example, between the pilot caps 1380 and the pilot caps 1380, the coupling process is complicated and the size of the pilot cap 1380 increases. .

In the practice of the present invention, other examples of the plunger will be described with reference to FIGS. 10 to 16.

As shown in FIGS. 10 to 12 , an upper passage R11 may be provided on the top of the plunger 1330 through or extending toward the inside and outside of the plunger 1330 . The upper passage R11 may be connected to at least a part of the upper damper groove R3. The upper passage R11 may penetrate from at least a portion of the lower ring region of the upper damper groove R3 to an outer circumferential surface of the plunger 1330 . Also, the upper passage R11 may extend to the upper inner groove R2 through the upper damper groove R3. The length of the upper passage R11 may be the same as the distance from the outer circumferential surface of the plunger 1330 to the upper inner groove R2. One or more upper passages R11 may be disposed along the upper damper groove R3.

The upper passage R11 can remove the internal pressure of the upper damper groove R3 when the upper damper 1210 is inserted into the upper damper groove R3, and the pressure of the upper damper groove R3 and the external pressure can be connected to the same. In addition, the upper passage R11 may be provided as a path through which moisture that may be generated in the upper damper groove R3 into which the upper damper 1210 is inserted moves. It may be provided in a structure gradually lowered toward the outer circumferential surface of. The upper passage R11 may overlap the lower end of the upper damper 1210 in a horizontal direction and communicate with the upper inner groove R2 through the lower end of the upper damper 1210.

The upper passage R11 may have a minimum separation distance D5 from the upper surface of the plunger 1330 smaller than a distance D4 to a lower end of the upper damper 1210, and a maximum separation distance from the upper damper 1210 ) may be greater than the distance D4 to the lower end.

The maximum separation distance between the upper flow channels R11 may be equal to or smaller than the second depth D3 of the upper damper groove R3, for example, 30% or more of the first depth D0 of the upper inner groove R2. For example, it is formed in the range of 30% to 70% or 30% to 60%, so that the decrease in stiffness of the plunger 1330 can be prevented.

By making the upper passage R11 connected to the upper damper groove R3 on the upper part of the outer circumferential surface of the plunger 1330, the internal pressure problem generated when the upper damper 1210 is inserted is solved, and the upper damper 1210 Insertion can be facilitated and detachment can be prevented. In addition, the first press-in protrusion 12 may be disposed on the inner circumferential surface or/or outer circumferential surface of the upper damper 1210, and the first opening groove 11 may not be separately formed. That is, the first opening groove 11 may be formed at a location other than the location to which the upper passage R11 is connected or may be removed.

13A to 15 are modified examples of the upper channel of the plunger in FIG. 10 and may optionally include the configuration disclosed above.

As shown in FIG. 13A , the upper passage R12 is connected to the lower end of the upper damper groove R3 and may be physically separated from the upper inner groove R2 to which the elastic member 1360 is coupled. Accordingly, by connecting the upper damper groove R3 and the upper flow path R12, the upper flow path R12 can remove internal pressure caused by the insertion of the upper damper 1210 into the upper damper groove R3. And, it can facilitate the insertion of the upper damper 1210, and can provide a passage through which moisture or fluid can move.

As shown in FIG. 13B , the upper passage R13 is connected to the middle portion of the upper inner groove R2 and the upper damper groove R3, and may not be exposed to the outer circumferential surface of the plunger 1330. The upper passage R13 may be processed through the upper inner groove R2. The upper channel R13 may be connected to an upper inner groove R2 where the upper buffer groove R3 and the elastic member 1360 are coupled. Accordingly, by connecting the upper damper groove R3, the upper inner groove R2, and the upper passage R12, the upper passage R12 is inserted into the upper damper groove R3 with the upper damper 1210 It is possible to remove the generation of internal pressure according to this, it is possible to facilitate the insertion of the upper damper 1210, and it is possible to provide a passage through which moisture or fluid can move.

As shown in FIG. 14 , a plurality of upper passages R14 and R15 may be disposed above the plunger 1330 . The first upper passage R14 may connect one side of the upper damper groove R3 and the upper inner groove R3. The second upper passage R15 may connect the other side of the upper damper groove R3 and the upper inner groove R3. The first and second upper passages R14 and R15 may be disposed on opposite sides of each other or may be provided in an angle range of 90 degrees to 150 degrees from the central axis of the plunger 1330 . The first and second upper passages R14 and R15 may be disposed on the same vertical straight line as one end and the other end of the middle passage R4, or at least one of them may be disposed on another vertical straight line.

The first upper passage R14 penetrates from one side of the upper damper groove R3 to the outer circumferential surface of the plunger 1330 and extends from one side of the upper damper groove R3 to the upper inner groove R2. can The second upper passage R15 penetrates from the other side of the upper damper groove R3 to the outer circumferential surface of the plunger 1330, and extends from the other side of the upper damper groove R3 to the upper inner groove R2. can

The first and second upper passages R14 and R15 can remove the internal pressure of the upper damper groove R3 when the upper damper 1210 is inserted into the upper damper groove R3, and the upper damper It may be connected so that the pressure of the groove R3 and the external pressure are the same. In addition, the first and second upper passages R14 and R15 may be provided as paths for moving moisture that may be generated in the upper damper groove R3 into which the upper damper 1210 is inserted. It may be shaped or provided with a structure gradually lowered toward the outer circumferential surface of the plunger 1330. The first and second upper passages R14 and R15 may overlap the lower end of the upper damper 1210 in a horizontal direction, and communicate with the upper inner groove R2 through the lower end of the upper damper 1210. have.

The maximum separation length from the upper surface of the plunger 1330 to the first and second upper passages R14 and R15 may be equal to or smaller than the second depth D3 of the upper damper groove R3 (FIG. 11), For example, 30% or more of the first depth D0 of the upper inner groove R2 is formed, for example, in the range of 30% to 70% or 30% to 60%, so that the decrease in rigidity of the plunger 1330 can be prevented. .

Occurs when the upper damper 1210 is inserted by connecting the first and second upper passages R14 and R15 to the upper damper groove R3 and the upper inner groove R2 on the top of the outer circumferential surface of the plunger 1330. It is possible to solve the internal pressure problem, facilitate insertion of the upper damper 1210, and prevent separation. In addition, the first press-in protrusion 12 may be disposed on the inner or/or outer circumferential surface of the upper damper 1210, and the first opening groove 11 may not be separately formed. That is, the first opening groove 11 may be formed at a location other than the location where the first and second upper passages R14 and R15 are connected, or may be removed.

As shown in FIG. 15 , a plurality of upper passages R16 and R17 may be disposed above the plunger 1330 . The first upper passage R16 is connected to one side of the upper damper groove R3, the second upper passage R17 is connected to the other side of the upper damper groove R3, and the first and second upper passages R16 ,R17) may be physically separated from the upper inner groove R2 to which the elastic member 1360 is coupled. Accordingly, by connecting the upper damper groove R3 and the first and second upper passages R16 and R17, the first and second upper passages R16 and R17 form an upper damper in the upper damper groove R3 ( 1210) can be removed, insertion of the upper damper 1210 can be facilitated, and moisture or fluid can be provided as a movable passage.

A modified example of the invention is to selectively connect the upper flow passage to the upper damper groove R3 through an inner groove or / and an outer circumferential surface at the top of the plunger 1330, thereby relieving the internal pressure due to the insertion of the upper damper 1210 In addition, it is possible to suppress the separation of the upper damper 1210. When the first opening groove is removed from the circumference of the upper damper 1210, manufacturing of the upper damper 1210 can be simplified and manufacturing defects can be reduced.

The intermediate flow path R4 disclosed above is provided in a form of penetrating laterally in the middle region of the plunger 1330, but may be formed on the outer circumferential surface of the plunger 1330 on one side or the other side of the upper inner groove R2. have. That is, the middle passage R4 may be formed on one side of the plunger 1330 and may not be formed on the other side.

Also, as shown in FIG. 16 , according to an exemplary embodiment of the present invention, the intermediate flow path R4 described above in the plunger 1330 may be removed. By removing the middle passage R4, the upper passages R11 to R17 described above may form a fluid passage with an upper portion of the upper inner groove R2. In addition, when moisture is generated, it may flow out through the connected upper passage when moving along the surface of the upper inner groove R2.

An embodiment of the invention may include a guide member 1340 surrounding the plunger 1330. The guide member 1340 may be formed of a non-magnetic material. The guide member 1340 may have a hollow 1341 shape through which an inside is passed. The hollow 1341 of the guide member 1340 may be formed in a central region of the guide member 1340, and the hollow 1341 may be a through hole for inserting the plunger 1330. The guide member 1340 may guide the movement of the plunger 1330, and as shown in FIG. 2, the fluid may be moved to the upper side of the plunger 1330 or to the inside or outside of the guide member 1340.

An embodiment of the present invention may include at least one of a pilot cap 1380 and a plunger guide 1390 around the lower portion of the plunger 1330 . As shown in FIG. 19, the plunger guide 1390 includes a hollow guide body 1391, an upper locking portion 1393, a plurality of inner protrusions 1392 inclined inwardly, and a plurality of inner protrusions 1392. It may include a fluid flow penetration part 1390F and a guide recess 1390R disposed therebetween.

The upper hooking part 1393 of the plunger guide 1390 may be firmly coupled to the inner coupling groove 1322C of the core extension part 1322 . A plurality of inner protrusions 1392 of the plunger guide 1390 are bent from the outside to the inside, and can firmly guide and support the pilot cap 1380 and the lower portion of the plunger 1330 as shown in FIG. 18 . In addition, by removing the elastic member 1360 previously disposed around the circumference between the plunger guide 1390 and the pilot cap 1380, the size of the plunger guide 1390 can be reduced, and the pilot cap 1380 can be more firmly installed. The bottom can be supported.

The fluid flow penetrating portion 1390F of the plunger guide 1390 is located at a position corresponding to the inlet 1101 of the housing 1100, thereby preventing the plunger from escaping without disturbing the flow of the introduced fluid. It works. In the embodiment, the plunger protrusion 1390P of the plunger guide 1390 is coupled to the inner recess 1322R of the core expansion part 1322 so that the fluid flow through part 1390F of the plunger guide 1390 is connected to the fluid inlet of the housing ( 1101), there is a technical effect that can be controlled to coincide with the axial direction.

According to the embodiment, as the plunger guide 1390 firmly guides the lower portion of the plunger 1330 and the pilot cap 1380 and supports the outer side, there is a technical effect capable of implementing stable performance as a solenoid valve. In addition, the embodiment has a complex and special technical effect of preventing the escape of the plunger without disturbing the flow of the introduced fluid by providing a plunger guide 1390 of a smaller size.

As shown in FIGS. 4 to 6 , the core shaft 1320 includes a core body 1321 disposed above the plunger 1330, and a core extension part bent outward from the lower circumference of the core body 1321 ( 1322) may be included. The core body 1321 includes a circular upper protrusion 1325, and a hollow R1 into which the plunger 1330 can be inserted may be disposed at the inner lower portion. As shown in FIG. 18 , the core extension part 1322 may include a coupling groove 1322C on an inner circumference and an inner recess 1322R on an inner portion. The coupling groove 1322C of the core expansion unit 1322 may be formed in a ring shape, and the upper locking portion 1393 of the plunger guide 1390 shown in FIG. 19 is coupled to prevent up/down separation. The inner recess 1322R may be coupled with the plunger protrusion 1390P of the plunger guide 1390 to prevent rotation. Accordingly, it is possible to prevent the plunger guide 1390 from being vertically separated or rotated from the core shaft 1320 . In addition, since the core recess 1320R disposed on a part of the outer circumference of the core shaft 1320 is matched to the inner cover protrusion of the cover member 1400 as shown in FIG. 4 , rotation can be prevented.

4 and 7 , the plunger 1330 may include a lower passage R0. The lower passage R0 is connected to a space into which the pilot 1370 is inserted, and may pass through the plunger 1330 in left/right directions or forward/backward directions. The lower passage R0 may be disposed on the same horizontal straight line or may be further formed toward different sides. Accordingly, two or more or three or more may be formed around the lower circumference of the plunger 1330 .

One end of the lower passage R0 may be disposed on the same vertical straight line as one end of the middle passage R4 or may be disposed on a different vertical straight line. The other end of the lower passage R0 may be disposed on the same vertical straight line as the other end of the middle passage R4 or may be disposed on a different vertical straight line. The lower flow path R0 performs a function of discharging fluid to the outside when the pilot 1370 is inserted, or a plunger having the lower damper 1220 after the external fluid flows into the vicinity of the pilot 1370. When the 1330 moves in the vertical up direction, the through passage 1371 may be used as a path for fluid to move.

The plunger 1330 may have a lower outer circumferential surface 1330S that is more stepped than the upper outer circumferential surface. That is, the diameter of the lower outer circumferential surface 1330S may be smaller than the diameter of the upper outer circumferential surface.

The lower inner portion 1381 of the pilot cap 1380 may be bent from the lower outer circumferential surface 1330S of the plunger 1330 to the lower circumference of the plunger 1330 . The lower inner portion 1381 of the pilot cap 1380 may face the lower outer circumferential surface 1330S of the pilot cap 1380 . The lower part of the outer circumferential surface of the plunger 1330 has a stepped structure, and may face the inner portion 1381 of the lower end of the pilot cap 1380, and may limit movement or increase compression load by the elastic member 1360. have.

One of the technical problems of the embodiment is that in the solenoid valve for a fuel cell, since the position where the elastic member is mounted is fixed on the top of the plunger 1330, the compression or restoring force of the spring directly affects the plunger 1330, so in the solenoid valve The problem of increasing power consumption can be solved.

According to the embodiment, as the elastic member 1360 is disposed above the plunger 1330, compression and restoration of the elastic member 1360 can be controlled according to the vertical movement of the plunger 1330 without a separate structure. Therefore, there is a technical effect of reducing the power consumption of the solenoid valve and providing a simple structure. For example, in the solenoid valve for a fuel cell according to the internal technology, as the position where the elastic member is mounted on the outer circumference of the lower part of the plunger is fixed, there is a problem in that a structure for supporting it is required for compression and restoration of the spring. Since a compressive load is indirectly applied to the moving direction of the plunger 1330, power consumption according to the movement of the plunger 1330 may increase. Also, conventionally, when the compressive load of the lower outer spring of the plunger becomes larger than necessary, the solenoid valve has a problem in that power consumption increases. For example, in terms of power consumption, if the solenoid valve continuously consumes more than 2 W of power, a technical problem occurs, and it is necessary to minimize power consumption.

22 is a perspective view of a vehicle 3000 equipped with a solenoid valve 2000 for a fuel cell according to an embodiment.

Referring to FIG. 22 , the solenoid valve 2000 according to the embodiment may be applied to a hydrogen supply device including a hydrogen supply unit, and the hydrogen supply device may be installed in a vehicle 3000. The hydrogen supply device includes the above-described hydrogen tank, the fuel cell solenoid valve 2000, a first pipe (not shown) connecting the hydrogen tank and the inlet 1101 of the solenoid valve 2000, the solenoid valve 2000 ) may include a second pipe (not shown) connecting the outlet 1102 and the fuel cell stack.

Hydrogen from the hydrogen tank may be supplied to the fuel cell solenoid valve 2000 through the first pipe, and after the hydrogen flows through the solenoid valve 2000, a predetermined supply valve may be supplied through the second pipe. It can be provided to the fuel cell stack through The hydrogen supply device can be applied not only to the vehicle 3000 using a fuel cell as a power source as shown in FIG. 21 but also to various applications based on a fuel cell.

Features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, and effects illustrated in each embodiment can be combined or modified with respect to other embodiments by those skilled in the art in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention. Although the above has been described with reference to the embodiments, this is only an example and does not limit the present invention, and those skilled in the art to which the present invention belongs will not deviate from the essential characteristics of the present embodiment. It will be appreciated that various variations and applications are possible. For example, each component specifically shown in the embodiment can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims (7)

a housing including an inlet through which fluid flows, a fluid passage through which the fluid flows, and an outlet through which the fluid is discharged;
a plunger disposed on the housing and moved to open and close the fluid passage;
an elastic member coupled to an upper inner side of the plunger;
a pilot disposed below the plunger, opening and closing the fluid passage, and having a through passage;
a core shaft in which the pilot and the plunger are disposed;
a ring-shaped upper damper coupled to an upper portion of the plunger; and
And a lower damper coupled to the lower portion of the plunger to face the pilot.
The plunger,
An upper damper groove into which the upper damper is inserted, a lower damper groove into which the lower damper is inserted, and an upper flow path passing through at least one of an inner side and an outer side of the plunger in a lateral direction from the upper damper groove,
And an upper inner groove into which the elastic member is inserted at the top of the plunger,
The plunger includes a middle passage connected to the upper inner groove in a lateral direction and a lower passage disposed outside the pilot.
Solenoid valve for fuel cell. According to claim 1,
The upper damper and the lower damper are physically separated,
Solenoid valve for fuel cell. delete a housing including an inlet through which fluid flows, a fluid passage through which the fluid flows, and an outlet through which the fluid is discharged;
a plunger disposed on the housing and moved to open and close the fluid passage;
an elastic member coupled to an upper inner side of the plunger;
a pilot disposed below the plunger, opening and closing the fluid passage, and having a through passage;
a core shaft in which the pilot and the plunger are disposed;
a ring-shaped upper damper coupled to an upper portion of the plunger; and
And a lower damper coupled to a lower portion of the plunger to face the pilot.
The plunger,
An upper damper groove into which the upper damper is inserted, a lower damper groove into which the lower damper is inserted, and an upper flow path passing through at least one of an inner side and an outer side of the plunger in a lateral direction from the upper damper groove,
And an upper inner groove into which the elastic member is inserted at the top of the plunger,
The upper inner groove has a ring shape,
The upper passage is connected to one side and the other side of the upper inner groove,
The upper damper includes a plurality of first press-in projections protruding from an outer circumferential surface; and a solenoid valve for a fuel cell comprising an upper portion having a convex curved surface. a housing including an inlet through which fluid flows, a fluid passage through which the fluid flows, and an outlet through which the fluid is discharged;
a plunger disposed on the housing and moved to open and close the fluid passage;
an elastic member coupled to an upper inner side of the plunger;
a pilot disposed below the plunger, opening and closing the fluid passage, and having a through passage;
a core shaft in which the pilot and the plunger are disposed;
a ring-shaped upper damper coupled to an upper portion of the plunger; and
And a lower damper coupled to a lower portion of the plunger to face the pilot.
The plunger,
An upper damper groove into which the upper damper is inserted, a lower damper groove into which the lower damper is inserted, and an upper flow path passing through at least one of an inner side and an outer side of the plunger in a lateral direction from the upper damper groove,
And an upper inner groove into which the elastic member is inserted at the top of the plunger,
The upper passage is connected to at least one of the outer side of the plunger or the upper opening groove,
A solenoid valve for a fuel cell wherein a maximum distance from an upper side of the plunger to a lower end of the upper passage is greater than a distance to a lower end of the upper damper. According to claim 1,
a pilot cap disposed on a lower outer circumferential surface of the plunger and bent to a lower circumference of the pilot; and
A plunger guide coupled to a lower inner side of the core shaft and surrounding the pilot cap,
The plunger guide includes a plurality of inner protrusions protruding below the pilot solenoid valve for a fuel cell. a housing including an inlet through which fluid flows, a fluid passage through which the fluid flows, and an outlet through which the fluid is discharged;
a cover member disposed above the housing;
a plunger disposed between the housing and the cover member and moved to open and close the fluid passage;
a solenoid driver disposed inside the cover member and reciprocating the plunger in a vertical direction;
a pilot disposed below the plunger, opening and closing the fluid passage, and having a through passage;
a core shaft in which the pilot and the plunger are disposed;
an upper damper and an elastic member coupled to an upper portion of the plunger; and
A lower damper coupled to the lower portion of the plunger to face the pilot and physically separated from the upper damper;
The upper damper is disposed in an area that does not overlap with the lower damper in a vertical direction,
The plunger,
an upper damper groove into which the upper damper is inserted;
a lower damper groove into which the lower damper is inserted; and
And an upper passage passing through at least one of the inside and outside of the plunger in a lateral direction from the upper damper groove,
And an upper inner groove into which the elastic member is inserted at the top of the plunger,
The plunger includes a middle passage connected to the upper inner groove in a lateral direction and a lower passage disposed outside the pilot.
fuel supply.

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