KR102297671B1 - Solenoid velve for fuel cell, and device having the same - Google Patents

Abstract

In accordance with an embodiment, a solenoid valve for a fuel cell comprises: a housing including an inlet through which a fluid is introduced, and an outlet through which the fluid is discharged; a connector disposed in the housing and disposed between the inlet and the outlet; and a solenoid driver disposed on the connector, and opening and closing the connector. The solenoid driver includes: a coil for forming a magnetic field in accordance with applied power; a first core disposed on the coil and magnetized in a magnetic field formed by the coil; a plunger disposed in the hollow of the coil and provided to be movable in a vertical direction; an opening and closing member disposed on the lower surface of the plunger, and for opening and closing the connector; a guide member disposed between the coil and the plunger, and for guiding the movement of the plunger; a support member disposed on the lower surface of the plunger; an elastic member disposed between the guide member and the support member; and a gap washer disposed between the first core and the plunger, and comprising a resin material. The first core includes a first groove formed on a lower surface thereof facing the plunger. The gap washer can be disposed on the lower surface of the first core and in the first groove. Therefore, the solenoid valve can increase proportional control characteristics.

Description

Solenoid valve for fuel cell and device including same

The embodiment relates to a solenoid valve for a fuel cell and an apparatus including the same.

BACKGROUND ART With global warming on environmental pollution, interest in environmental protection around the world is increasing. Among them, air pollution, which is one 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 fuels as main fuels, such as automobiles, heating devices, and power plants. 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-described fossil fuels.

At this time, the nitrogen oxide _{serves as a precursor to form ozone (O 3} ) and may cause acid rain, which may 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, the carbon monoxide is highly flammable, and may be fatal because it binds to hemoglobin in the human body and interferes with the oxygen supply in the body. In addition, the fine dust contains carbon, organic hydrocarbons, nitrates, toxic metal components, and the like, and may be introduced into the body due to its very small size, which may 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 vehicle that does not emit the above-described exhaust gas has been actively conducted.

A hydrogen fuel cell vehicle is a vehicle that uses the reverse reaction of water electrolysis, and uses electricity generated by an electrochemical reaction of hydrogen and oxygen as a power source. In general, a hydrogen fuel cell vehicle includes a fuel cell stack that forms electricity through an electrochemical reaction, a hydrogen supply unit that supplies hydrogen to the fuel cell stack, an air supply unit that supplies 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 is a purge valve for managing the hydrogen concentration of the anode inside the fuel cell stack, a water trap for collecting and storing water discharged from the anode of the fuel cell stack, and a water level sensing for detecting and discharging the water collected in the water trap. including sensors and drain valves.

The hydrogen supply unit may include a hydrogen shutoff valve for supplying or blocking hydrogen from the hydrogen tank, and may include a hydrogen supply valve disposed between the hydrogen shutoff valve and the fuel cell stack. The hydrogen shutoff valve and the hydrogen supply valve may include a solenoid driving unit that opens and closes the valve by applied power or controls the amount of fluid flowing by adjusting the degree of opening.

For example, when power is applied to the hydrogen supply valve (on state), the valve may be opened. In this case, the distance between the plunger and the core may be decreased according to the applied power, and the suction force between the two components may be increased. In addition, the plunger and the core may be coupled in contact with a suction force corresponding to the maximum output of the solenoid driving unit at the zero point of the stroke where the two components are combined.

For this reason, when the hydrogen supply valve is opened (On state) to reduce the degree of opening by reducing power or to close the valve by turning off the power (Off state), the plunger is smoothly separated from the core However, there is a problem in that the OFF response speed is delayed due to the residual magnetic flux density between the two components having an attraction force greater than the restoring force of an elastic member such as a spring. Accordingly, there is a problem in that proportional control of the solenoid valve is difficult.

Accordingly, there is a need for a new solenoid valve for a fuel cell capable of solving the above problems and a device including the same.

An embodiment is to provide a solenoid valve for a fuel cell with improved proportional control characteristics.

In addition, the embodiment intends to provide a solenoid valve for a fuel cell capable of preventing the response speed from being delayed.

In addition, the embodiment intends to provide a solenoid valve for a fuel cell capable of preventing a decrease in output.

The solenoid valve for a fuel cell according to the embodiment includes a housing including an inlet through which a fluid is introduced and an outlet through which the fluid is discharged, a connection part disposed in the housing, and a connection part disposed between the inlet and the outlet port, and the connection part, and the a solenoid driving unit for opening and closing a connection unit, the solenoid driving unit forming a magnetic field according to applied power; a first core disposed on the coil unit and magnetized to the magnetic field formed by the coil unit; the coil unit A plunger disposed in the hollow of the pole and provided movably in the vertical direction, an opening/closing member disposed on the lower surface of the plunger and opening and closing the connection part, a guide member disposed between the coil part and the plunger to guide the movement of the plunger , a support member disposed on a lower surface of the plunger, an elastic member disposed between the guide member and the support member, and a gap washer disposed between the first core and the plunger and comprising a resin material; One core may include a first groove formed on a lower surface facing the plunger, and the gap washer may be disposed on a lower surface of the first core and in the first groove.

In addition, the first groove includes a 1-1 groove formed on a lower surface of the first core and a 1-2 groove formed at an end of the 1-1 groove, and the 1-1 groove is horizontal. A width in a direction may be smaller than a width in a horizontal direction of the first-second groove, and a height of the first-first groove may be greater than a height of the first-second groove.

Also, the horizontal width of the 1-1 groove may be 50% or less of the horizontal width of the lower surface of the first core.

Also, the height of the 1-1 groove may be 50% or less of the total height of the first core.

In addition, the first core and the plunger may be spaced apart from each other by the gap washer.

In addition, the gap washer includes a lower washer disposed on the lower surface of the first core, a middle washer disposed in the 1-1 groove, and an upper washer disposed in the 1-2 groove, wherein the lower washer includes has the same horizontal width as the lower surface of the first core, the middle washer has the same horizontal width as the 1-1 groove, and the upper washer has the same horizontal width as the 1-2 groove, The height of the lower washer may be less than or equal to 40% of the total height of the gap washer.

In addition, the guide member includes a support portion disposed between the housing and the coil portion, and an extension portion disposed between the coil portion and the plunger, and a sealing member disposed between the first core and the extension portion and the nose It may further include a second core disposed between a portion and the first core, and a lowermost end of the second core may be disposed below a lowermost surface of the first core.

In addition, the vehicle according to the embodiment may include a hydrogen supply device, and the hydrogen supply device may include the solenoid valve for the fuel cell.

The solenoid valve for a fuel cell according to the embodiment may include a gap washer disposed between the first core and the plunger. In this case, the gap washer may have a size such as a set width and height, and thus, a proportional control characteristic between the first core and the plunger may be improved.

Accordingly, the embodiment can prevent the delay of the OFF response speed between the first core and the plunger due to the residual magnetic flux density when the solenoid valve is closed again after being opened, and It can prevent the output from dropping. Therefore, the embodiment has a fast response speed and can more precisely control the opening and closing of the connection part.

In addition, the solenoid valve for a fuel cell according to the embodiment may prevent a non-linear increase/decrease in the flow rate of a fluid flowing when the valve is opened and closed due to improved proportional control characteristics.

1 is a cross-sectional view of a solenoid valve according to an embodiment.
2 is a cross-sectional view in which the housing is omitted in the solenoid valve according to the embodiment.
FIG. 3 is an enlarged cross-sectional view of an area of the solenoid valve of FIG. 2 .
FIG. 4 is a cross-sectional view of a core in the solenoid valve of FIG. 2 .
FIG. 5 is a cross-sectional view of a gap washer in the solenoid valve of FIG. 2 .
6 is another cross-sectional view in which the housing is omitted in the solenoid valve according to the embodiment.
7 is a cross-sectional view of the core in the solenoid valve of FIG.
FIG. 8 is a cross-sectional view of a gap washer in the solenoid valve of FIG. 6 .
9 to 11 are graphs of changes in force according to strokes in the solenoid valves of Comparative Examples and Examples.
12 is a perspective view of a vehicle to which a solenoid valve according to an embodiment is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some embodiments described, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of the components may be selected among the embodiments. It can be combined and substituted for use.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be generally understood by those of ordinary skill in the art to which the present invention pertains, unless specifically defined and described explicitly. It may be interpreted as a meaning, and generally used terms such as terms defined in advance may be interpreted in consideration of the contextual meaning of the related art.

In addition, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In the present specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or more than one) of A and (and) B, C", it is combined with A, B, C It may include one or more of all possible combinations.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only used to distinguish the component from other components, and are not limited to the essence, order, or order of the component by the term. And, when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also with the component It may also include a case of 'connected', 'coupled' or 'connected' due to another element between the other elements.

In addition, when it is described as being formed or disposed on "above (above) or below (below)" of each component, the top (above) or bottom (below) is one as well as when two components are in direct contact with each other. Also includes a case in which another component as described above is formed or disposed between two components. In addition, when expressed as “upper (upper) or lower (lower)”, a meaning of not only an upper direction but also a lower direction based on one component may be included.

In addition, before the description of the embodiment of the invention, the first direction may mean the x-axis direction shown in the drawings, the second direction may be a different direction from the first direction. For example, the second direction may mean a y-axis direction shown in the drawing in a direction perpendicular to the first direction. Also, the third direction may be different from the first and second directions. For example, the third direction may mean a z-axis direction shown in the drawing in a direction perpendicular to the first and second directions. In addition, the horizontal direction may mean a planar direction of the first and second directions (x-axis, y-axis direction), the vertical direction may mean a third direction (z-axis direction).

1 is a cross-sectional view of a solenoid valve according to an embodiment, and FIG. 2 is a cross-sectional view in which a housing is omitted from the solenoid valve according to the embodiment. In addition, FIG. 3 is an enlarged cross-sectional view of an area of the solenoid valve of FIG. 2 .

1 to 3 , the solenoid valve 1000 for a fuel cell according to the embodiment may be connected to a hydrogen tank (not shown). In detail, the solenoid valve 1000 for a fuel cell may be disposed between the hydrogen tank and a stack (not shown) of the fuel cell to connect the two components. For example, the solenoid valve 1000 may be disposed between a hydrogen shutoff valve connected to the hydrogen tank and the stack of the fuel cell. That is, the solenoid valve 1000 for a fuel cell according to the embodiment may be a hydrogen supply valve that lowers the pressure of hydrogen before supplying hydrogen to the fuel cell stack and controls the supply amount.

The solenoid valve 1000 for a fuel cell may include a housing 100 , a solenoid driving unit 300 , and a cover member 400 .

The housing 100 may be disposed between the hydrogen tank and the fuel cell stack. For example, the housing 100 may be disposed between the hydrogen shutoff valve and the fuel cell stack.

The housing 100 may include a material having a predetermined strength and excellent reliability. For example, the housing 100 may include a metal or a resin material. In detail, the housing 100 may include a resin material, for example, a thermoplastic resin material. For example, the housing 100 may include a polypropylene resin, a polyethylene resin, a polyolefine resin, a polycarbonate resin, an acrylonitrile butadiene styrene copolymer (ABS) resin, and a thermoplastic urethane (TPU) resin. The resin material may include at least one of a resin, a polyamide resin, a polyphthalamide (PPA) resin, a polyphenylene sulfide (PPS) resin, a polyether ether ketone (PEEK) resin, and a liquid crystal polymer (LCP) resin.

As the housing 100 includes a resin material, it may have improved moldability. For example, the housing 100 may be formed by various injection processes such as double injection and insert injection, and may be provided in various sizes and shapes to have improved design freedom.

The housing 100 may include an inlet 101 and an outlet 102 .

The inlet 101 is an inlet to which a fluid is supplied and may be connected to the hydrogen tank. Also, when the above-described hydrogen shutoff valve is disposed between the hydrogen tank and the solenoid valve 1000 for a fuel cell, the inlet 101 may be connected to the hydrogen shutoff valve. The inlet 101 may be connected to the outlet of the hydrogen shutoff valve. The fluid supplied by the opening of the hydrogen shutoff valve may be introduced into the housing 100 through the inlet 101 .

The outlet 102 may be connected to the inlet 101 . The outlet 102 may be an outlet for discharging a fluid. The fluid introduced through the inlet 101 may be discharged through the outlet 102 after flowing through the solenoid valve 1000 for the fuel cell.

The inlet 101 and the outlet 102 may be spaced apart from each other and disposed on the outer surface of the housing 100 . For example, the inlet 101 and the outlet 102 may be disposed on different outer surfaces of the housing 100 . In detail, the inlet 101 may be disposed on one side of the housing 100 facing the hydrogen shutoff valve, and the outlet 102 may be disposed on one side and the other side of the housing 100 . In addition, although not shown in the drawings, the inlet 101 and the outlet 102 may be disposed on the same outer surface of the housing 100 , but the present invention is not limited thereto.

The housing 100 may include a connection part. The connection part may be a passage connecting the inlet 101 and the outlet 102 . The connection part may be a fluid flow path located between the inlet 101 and the outlet 102 .

A plurality of the connection parts may be provided in the housing 100 . For example, the connection part may include a first connection part 110 , a second connection part 120 , and a third connection part 130 . The first to third connecting parts 110 , 120 , and 130 may be provided in one form selected from a pipe or an accommodation space in the housing 100 .

The first connection part 110 may be connected to the inlet 101 . One end of the first connection part 110 may be connected to the inlet 101 . One end of the first connection part 110 may have a width or a diameter corresponding to that of the inlet 101 . A flow path extending from one end of the first connection part 110 may have the same or different width or diameter as that of the inlet 101 . The first connection part 110 may be provided in the form of a pipe having a horizontal cross-sectional shape of a circle or a polygon.

The first connection part 110 may extend to an inner central region of the housing 100 . The first connection part 110 may extend from the inlet 101 toward the solenoid driving part 300 . For example, the first connection part 110 may extend in one direction from the inlet 101 and may be bent to extend in a vertical direction (z-axis direction), and the other end of the first connection part 110 is the plunger. It may be disposed in a region overlapping with 330 . In detail, the other end of the first connection part 110 may be disposed in a region overlapping the opening/closing member 335 disposed under the plunger 330 in the vertical direction (z-axis direction). That is, the first connection part 110 may be disposed between the inlet 101 and the opening/closing member 335 .

The first connection part 110 may be in contact with or spaced apart from the opening/closing member 335 . In detail, according to the position of the plunger 330 moving upward or downward by the driving force of the solenoid driving unit 300 , the end of the first connection unit 110 may be in contact with or separated from the opening and closing member 335 .

For example, when the plunger 330 moves upward by the applied driving force, the opening/closing member 335 disposed under the plunger 330 may be spaced apart from the other end of the first connection part 110 . have. In this case, the inlet 101 and the outlet 102 may communicate with each other. Therefore, in this case, the fluid introduced through the inlet 101 passes through the first connection part 110 , the third connection part 130 , and the second connection part 120 to be discharged to the outlet 102 . can

In addition, when the plunger 330 does not move upward and is in a closed state, the opening/closing member 335 disposed under the plunger 330 may be in contact with the other end of the first connection part 110 . . In this case, the inlet and the outlet 102 may not communicate with each other, and the fluid introduced through the inlet 101 may not flow to a connection part other than the first connection part 110 .

The second connection part 120 may be connected to the outlet 102 . One end of the second connection part 120 may be connected to the outlet 102 . One end of the second connection part 120 may have a width or a diameter corresponding to that of the outlet 102 . A flow path extending from one end of the second connection part 120 may have the same or different width or diameter as that of the outlet 102 . The second connection part 120 may be provided in the form of a pipe having a horizontal cross-sectional shape of a circle or a polygon.

The second connection part 120 may extend to an inner central region of the housing 100 . The second connection part 120 may extend from the outlet 102 toward the solenoid driving part 300 . For example, the second connection part 120 may extend in one direction from the outlet 102 and be bent to extend in a vertical direction (y-axis direction). The second connection part 120 may extend toward the third connection part 130 . The second connection part 120 may be disposed between the outlet 102 and the third connection part 130 .

The third connection part 130 may be disposed between the first connection part 110 and the second connection part 120 . The third connection part 130 may be an internal space of the housing 100 . In detail, the third connection part 130 may be a space formed in an area corresponding to the first open area of the housing 100 and the solenoid driving unit 300 . Here, the first open area may be an open upper area of the housing 100 .

The solenoid driving unit 300 may be disposed on the third connection unit 130 . The third connection part 130 may have a shape corresponding to the solenoid driving part 300 . The third connection part 130 may be shielded from the outside of the housing 100 by the solenoid driving part 300 . The solenoid driving unit 300 may be partially inserted into the third connection unit 130 . The solenoid driving unit 300 may prevent the fluid introduced into the third connection unit 130 from flowing out through the first open area.

The third connection part 130 may connect the first connection part 110 and the second connection part 120 to each other. In detail, the third connection part 130 may be connected to the second connection part 120 , and may be selectively connected to the first connection part 110 . In detail, the third connection part 130 may or may not be connected to the first connection part 110 according to the movement of the plunger 330 . That is, the first to third connecting parts 110 , 120 , and 130 may be connected in whole or in part according to the driving force of the solenoid driving unit 300 .

The solenoid driving unit 300 may be disposed on the housing 100 to control opening and closing of the connection unit. For example, the solenoid driving unit 300 may control the position of the plunger 330 by applied power, and may selectively open and close the first connection unit 110 .

The solenoid driving unit 300 includes a coil unit 310 , a first core 320 , a plunger 330 , a guide member 340 , a support member 350 , an elastic member 360 , and a gap washer 370 . ) may be included.

The coil unit 310 may include a bobbin 311 and a coil 312 .

The bobbin 311 may include a hollow extending in a vertical direction therein. The hollow of the bobbin 311 may be a through hole penetrating the upper and lower surfaces of the bobbin 311 . A first core 320 , a plunger 330 , and a guide member 340 , which will be described later, may be disposed in the hollow of the bobbin 311 .

The coil 312 may be disposed on the bobbin 311 . The coil 312 may be disposed around the outer circumference of the bobbin 311 . The coil 312 may be wound and disposed outside the bobbin 311 . The coil 312 may form a magnetic field according to applied power.

The first core 320 may be disposed on the coil unit 310 . The first core 320 may be disposed on the bobbin 311 . A part of the first core 320 may be inserted into the hollow of the bobbin 311 and disposed. The first core 320 may include a magnetic material and may be magnetized in a magnetic field formed by the coil unit 310 .

The first core 320 may include a first groove 321 . The first groove 321 may be formed on a lower surface of the first core 320 facing the plunger 330 . The first groove 321 may have a concave shape from the lower surface of the first core 320 toward the upper surface of the first core 320 .

The first groove 321 may be formed in a central region of the lower surface of the first core 320 . The first core 320 may control the magnetic force and magnetic flux density generated by the first groove 321 formed in the central region of the lower surface. The first groove 321 formed in the first core 320 will be described in more detail with reference to FIG. 4 to be described later.

The first core 320 may further include a second groove 322 . The second groove 322 may be formed on a side surface of the first core 320 facing the coil unit 310 . In detail, the second groove 322 may be formed on a side surface of the first core 320 corresponding to the extension 342 of the guide member 340 in a horizontal direction. The second groove 322 may have a concave shape from the side surface of the first core 320 toward the center. The second groove 322 is a space for a second sealing member 390 to be described later, and may have a shape corresponding to the second sealing member 390 .

In addition, the solenoid driving unit 300 may further include a second core 385 . The second core 385 may include a magnetic material and may be magnetized in a magnetic field formed by the coil unit 310 .

The second core 385 may be disposed between the first core 320 and the coil unit 310 . The second core 385 may be disposed on an outer circumference of the first core 320 . The second core 385 may extend in a vertical direction between the first core 320 and the bobbin 311 .

One region of the second core 385 may be disposed between the end 342a of the extension 342 of the guide member 340 and the bobbin 311 . For example, the lowermost end 385a of the second core 385 may be disposed below the lowermost surface of the first core 320 . In addition, the lowermost end 385a of the second core 385 may be disposed below the lowermost end of the gap washer 370 , which will be described later. Accordingly, the first core 320 and the second core 385 can effectively control the plunger 330 to be described later. For example, as the lowermost end 385a of the second core 385 is disposed lower than the first core 320 and the gap washer 370 , the cores 320 and 385 operate when power is applied. The plunger 330 may be controlled to move while maintaining a balance.

The plunger 330 may be disposed on the housing 100 . The plunger 330 may be disposed on the first open area of the housing 100 . The plunger 330 may be disposed in an area corresponding to the first connection part 110 . Also, the plunger 330 may be disposed in the hollow of the coil unit 310 to be movable in a vertical direction (z-axis direction). The plunger 330 may be provided to be movable in the vertical direction (z-axis direction) by the magnetic force of the first core 320 .

The plunger 330 may open and close the connection part (the first connection part 110 ). For example, a recess concave in the direction of the upper surface of the plunger 330 may be formed on a lower surface of the plunger 330 , and an opening/closing member 335 may be disposed in the recess.

The opening and closing member 335 may include a material having an elastic force. For example, the opening/closing member 335 may be made of a resin material such as polyvinyl chloride, silicone, polyurethane, EPDM (Ethylene Propylene), NBR (Nitrile Butadiene Rubber), FPM (Fluorinated Rubber), silicone, or a rubber material having elasticity. may include at least one of

The opening/closing member 335 may be disposed in a central region of the lower surface of the plunger 330 . In detail, the opening/closing member 335 may be disposed in an area overlapping the first connection part 110 in a vertical direction (z-axis direction). The opening/closing member 335 may open and close the first connection part 110 by the plunger 330 having a width greater than that of the other end of the first connection part 110 and moving by an applied magnetic force.

For example, when the solenoid driving unit 300 does not operate (Off state), an attractive force may not be generated between the first core 320 and the plunger 330 . Accordingly, the opening/closing member 335 may be elastically deformed in contact with the other end of the first connection part 110 by the elastic force of the elastic member 360 , and the solenoid valve 1000 may be closed.

In addition, when the solenoid driving unit 300 operates and the first core 320 is magnetized (on state), the plunger 330 moves upward and the opening/closing member 335 is connected to the first connection part ( 110) may be spaced apart from the other end. Accordingly, the solenoid valve 1000 may be opened. In addition, when the solenoid driving unit 300 operates at the maximum output, the plunger 330 may contact the gap washer 370 , and the uppermost surface of the plunger 330 is the second core 385 . It may be disposed above the lowermost end (385a).

The plunger 330 may include at least one through hole. For example, the plunger 330 may include a first through hole 331a and a second through hole 331b. The first through-hole 331a may be a hole passing through the upper and lower surfaces of the plunger 330 . In detail, the first through hole 331a may be a hole passing through the upper surface of the plunger 330 and the lower surface of the recess in which the opening and closing member 335 is disposed. The first through hole 331a may be disposed in a central region of the plunger 330 . For example, the first through hole 331a may be formed at a center of an upper surface of the plunger 330 and a center of a lower surface of the recess. Also, the second through hole 331b may be a hole passing through the side surface of the plunger 330 . In detail, the second through-hole 331b may be a hole passing through the side surface of the plunger 330 disposed in an area corresponding to the third connection part 130 . The second through-hole 331b may extend in a horizontal direction and communicate with the first through-hole 331a. The first through-hole 331a and the second through-hole 331b may communicate with each other. The plunger 330 may control the pressure inside the solenoid valve 1000 through the first through-hole 331a and the second through-hole 331b.

The guide member 340 may be disposed on the housing 100 . The guide member 340 is provided with a non-magnetic material and may guide the plunger 330 .

The guide member 340 may include a hollow. The hollow of the guide member 340 may be formed in a central region of the guide member 340 . The hollow may be a hole for inserting the plunger 330 . The guide member 340 may guide the movement of the plunger 330 .

The guide member 340 may include a support part 341 and an extension part 342 .

The support part 341 may be disposed between the housing 100 and the coil part 310 . The support part 341 may be disposed on the first open area of the housing 100 . The support part 341 may have a shape and a size corresponding to the first open area. The support part 341 may support the guide member 340 to be disposed at a set position when the plunger 330 moves.

Also, the extension part 342 may be disposed between the coil part 310 and the plunger 330 . The extension 342 may extend in a vertical direction (z-axis direction). The extension part 342 may be disposed in a hollow of the coil part 310 , for example, inserted into a hollow of the bobbin 311 . In this case, the uppermost end 342a of the extension part 342 may be adjacent to the first core 320 . In detail, the end 342a of the extension part 342 may be disposed between the first core 320 and the second core 385 disposed between the first core 320 and the coil part 310 . can In more detail, the end 342a of the extension 342 may be disposed above the lowermost end 385a of the second core 385 . That is, the end 342a of the extension portion 342, which is a non-magnetic material, may be disposed between two magnetic materials.

The guide member 340 may further include a support groove 343 . The support groove 343 may be formed on an inner surface of the support part 341 facing the housing 100 . The support groove 343 may have a concave shape in the direction from the inner surface of the support part 341 to the outer surface. The support groove 343 may have a shape corresponding to a fixing member 500 to be described later. The fixing member 500 may be fixed at a set position by the support groove 343 .

A part of the guide member 340 may be inserted into the first open area to shield the first open area of the housing 100 . For example, the first sealing member 150 may be disposed between the housing 100 and the support part 341 of the guide member 340 . The first sealing member 150 may include an elastic material. For example, the first sealing member 150 may include at least one of a resin material such as Nitrile Butadiene Rubber (NBR), Ethylene Propylene (EPDM), Fluorinated Rubber (FPM), silicone, etc., and a rubber material having elasticity. .

The first sealing member 150 may be elastically deformed while the housing 100 and the guide member 340 are coupled. Accordingly, it is possible to prevent foreign foreign substances from flowing into the solenoid valve 1000 through the area between the housing 100 and the support part 341 of the guide member 340 , and the inside of the housing 100 . It is possible to prevent a fluid, for example, hydrogen gas from leaking out of the solenoid valve 1000 through the in-between region.

The support member 350 may be disposed on the plunger 330 . The support member 350 may be disposed on a lower surface of the plunger 330 . The support member 350 may be coupled to the plunger 330 to support the opening/closing member 335 . For example, the support member 350 may be disposed on a partial region of the lower surface of the opening and closing member 335 facing the other end of the first connection part 110 . The support member 350 may be disposed on a peripheral region of a lower surface of the opening and closing member 335 . The support member 350 may directly contact the lower surface of the opening and closing member 335 . Accordingly, the support member 350 may prevent the opening/closing member 335 from being separated from the recess of the plunger 330 .

In addition, the support member 350 may include a support part (not shown) extending in a horizontal direction. The support part of the support member 350 may be disposed in an area corresponding to the elastic member 360 disposed between the guide member 340 and the support member 350 in the vertical direction (z-axis direction). The support part of the support member 350 may support the lower end of the elastic member 360 .

The elastic member 360 may be disposed on the support member 350 . The elastic member 360 may be disposed between the guide member 340 and the support member 350 . An upper end of the elastic member 360 may be disposed in contact with a lower surface of the guide member 340 , and a lower end of the elastic member 360 may be disposed in contact with an upper surface of the support member 350 , the guide member 340 and It may be disposed at a position set by the support member 350 .

The elastic member 360 may be disposed to surround a lower circumference of the plunger 330 and may be provided to be elastically deformable in an upper or lower direction. For example, the elastic member 360 may include a coil spring or the like. When the plunger 330 moves upward by the applied driving force, the elastic member 360 may elastically deform upward to open the connection part. Also, when no driving force is applied, the support member 350 coupled to the plunger 330 may be pushed downward to close the connection part.

The gap washer 370 may be disposed on the plunger 330 . The gap washer 370 may be disposed between the first core 320 and the plunger 330 . A part of the gap washer 370 may be disposed on the lower surface of the first core 320 , and the other part may be disposed to be inserted into the first groove 321 of the first core 320 .

The gap washer 370 may include a resin material having high hardness and rigidity. For example, the gap washer 370 may include at least one plastic material selected from polyetheretherketone (PEEK), polyphthalamide (PPA), and polyphenylene sulfide (PPS).

The gap washer 370 may include a hollow extending in a vertical direction therein. The hollow of the gap washer 370 may be a through hole penetrating the upper and lower surfaces of the gap washer 370 . A surface of the first groove 321 of the first core 320 facing the upper surface of the plunger 300 may be exposed through the hollow of the gap washer 370 .

The gap washer 370 may directly contact the first core 320 . Also, the gap washer 370 may directly contact the plunger 330 according to a driving force applied to the solenoid driving unit 300 . For example, when the solenoid driving unit 300 operates at the maximum output, the gap washer 370 may directly contact the upper surface of the plunger 330 .

That is, even when a driving force is applied to the solenoid driving unit 300 by the gap washer 370 , the first core 320 and the plunger 330 may be spaced apart from each other. In addition, the gap washer 370 is disposed at a set position and can control the magnetic flux density as it has a set size. Accordingly, the solenoid valve 1000 for a fuel cell according to the embodiment may proportionally control the plunger 330 . The gap washer 370 will be described with reference to FIG. 5 to be described later.

The solenoid driving unit 300 may further include a guide film 381 . The guide film 381 may be disposed between the plunger 330 and the guide member 340 . In detail, the guide film 381 may be disposed between the plunger 330 and the extension 342 of the guide member 340 . The guide film 381 may improve an align property, a friction property, and an adhesion property between the plunger 330 and the guide member 340 .

The solenoid driving unit 300 may further include at least one yoke. For example, the solenoid driving unit 300 may include a first yoke 383 and a second yoke 384 for inducing a magnetic force generated in the coil unit 310 .

The first yoke 383 may be disposed between the coil unit 310 and the plunger 330 . The first yoke 383 may be disposed between the bobbin 311 and the guide member 340 . The uppermost end of the first yoke 383 may be spaced apart from the second core 385 and disposed below the second core 385 . The first yoke 383 may have a cylindrical shape including a hollow extending in a vertical direction therein. The hollow of the first yoke 383 may be a through hole penetrating the upper and lower surfaces of the first yoke 383 . An extension 342 of the plunger 330 and the guide member 340 may be disposed in the hollow of the first yoke 383 .

The second yoke 384 may be disposed outside the coil unit 310 . The second yoke 384 may be disposed between the coil unit 310 and a cover member 400 to be described later and surround the coil unit 310 .

The solenoid driving unit 300 may further include a second sealing member 390 . The second sealing member 390 may be disposed between the first core 320 and the guide member 340 . In detail, the second sealing member 390 may be disposed in the second groove 322 , and may be disposed between the first core 320 and the extension 342 of the guide member 340 . In more detail, the second sealing member 390 may be disposed between the first core 320 and the end 342a of the extension part 342 .

The second sealing member 390 may include an elastic material. For example, the second sealing member 390 may include at least one of a resin material such as Nitrile Butadiene Rubber (NBR), Ethylene Propylene (EPDM), Fluorinated Rubber (FPM), silicone, etc., and a rubber material having elasticity. .

The second sealing member 390 may be elastically deformed while the first core 320 and the guide member 340 are coupled. Accordingly, it is possible to prevent foreign substances from flowing into the solenoid driving unit 300 through the area between the first core 320 and the guide member 340 . In addition, it is possible to prevent the fluid inside the solenoid driving unit 300, for example, hydrogen gas from leaking out of the solenoid valve 1000 through the in-between region. In addition, as the second sealing member 390 is disposed between the first core 320 and the guide member 340 , the welding between the first core 320 and the guide member 340 is performed. The process can be omitted. Accordingly, the solenoid driving unit 300 has improved reliability and at the same time, the gap washer 370 disposed between the first core 320 and the plunger 340 may be provided in various shapes and in various materials. .

The fuel cell solenoid valve 1000 may include a fixing member 500 . The fixing member 500 may be disposed in a lower region of the solenoid driving unit 300 . The fixing member 500 may be disposed in the third connection part 130 . The fixing member 500 may be coupled to the guide member 340 .

For example, a fixing protrusion 510 corresponding to the support groove 343 of the guide member 340 may be formed at one end of the fixing member 500 . The fixing protrusion 510 has a shape protruding toward the support groove 343 , the fixing projection 510 is mounted in the support groove 343 , and the fixing member 500 is the guide member 340 . can be fixed to

The fixing member 500 may include a predetermined accommodation space. A portion of the plunger 330 , the support member 350 , and the elastic member 360 may be disposed in the accommodation space of the fixing member 500 .

In addition, the fixing member 500 may support the support member 350 coupled to the plunger 330 . For example, the other end of the fixing member 500 may be bent and disposed on the lower surface of the support member 350 .

Accordingly, the fixing member 500 may support the supporting member 350 . In detail, as the other end of the fixing member 500 is disposed in an area corresponding to the lower surface of the supporting member 350 , the fixing member 500 is connected to the supporting member 350 and the supporting member 350 . The coupled plunger 330 may serve as a stopper that prevents the plunger 330 from being separated in the lower direction. Accordingly, the support member and the plunger 330 may be disposed at a set position by the fixing member 500 to open and close the connection part.

The fixing member 500 may be provided with a material that has a predetermined strength and is elastically deformable. For example, the fixing member 500 may be made of a resin material. Accordingly, the fixing member 500 may be provided to be detachably attached to the guide member 340 . For example, when the upper region of the fixing member 500 adjacent to the guide member 340 is pressed in the direction of the plunger 330 , the fixing protrusion 510 is caused by elasticity of the fixing member 500 . may be provided so that the guide member 340 is detachable from the support groove 343 . Accordingly, when the component included in the solenoid driving unit 300 is damaged or the durability is deteriorated, the fixing member 500 can be removed to easily replace the corresponding component.

The cover member 400 may be disposed on the housing 100 . The cover member 400 may include an open lower region and an accommodating space therein. The solenoid driving unit 300 may be inserted through a lower region of the cover member 400 to be disposed in the accommodation space.

The cover member 400 may include a material having a predetermined strength and excellent reliability with respect to the external environment. For example, the cover member 400 may include at least one of a metal, a ceramic, and a resin. In detail, when the cover member 400 includes a resin material, it may include a thermoplastic resin. For example, the cover member 400 is a polypropylene (Polypropylene) resin, a polyethylene (Polyethylene) resin, a polyolefin (Polyolefine) resin, a polycarbonate (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 Crystral Polymer) resin may include at least one resin material.

The cover member 400 may be coupled to the housing 100 . The cover member 400 may prevent the solenoid driving unit 300 from being exposed to the outside while fixing the solenoid driving unit 300 to a set position.

Hereinafter, the first core 320 and the gap washer 370 according to the embodiment will be described in more detail with reference to FIGS. 4 and 5 .

4 is a cross-sectional view of the core in the solenoid valve of FIG. 2, and FIG. 5 is a cross-sectional view of the gap washer in the solenoid valve of FIG.

Referring first to FIG. 4 , the first core 320 may be magnetized in a magnetic field formed by the coil unit 310 .

The first core 320 may have a first width d1 and a second width d2. The first width d1 is the maximum horizontal width of the first core 320 and may be greater than the horizontal width of the plunger 330 . The second width d2 may be a horizontal width of the lower surface of the first core 320 . The second width d2 may be smaller than the first width d1. In addition, the second width d2 may be greater than or equal to the horizontal width of the upper surface of the plunger 330 facing the lower surface of the first core 320 . For example, the second width d2 may be the same as the horizontal width of the upper surface of the plunger 330 .

The first groove 321 may include a 1-1 groove 321a and a 1-2 groove 321b.

The 1-1 groove 321a may be a region formed on a lower surface of the first core 320 . The 1-1 groove 321a may be disposed in a central region of the lower surface of the first core 320 . The 1-1 groove 321a may be a region extending from the lower surface of the first core 320 . Based on the horizontal direction, the first-first groove 321a may be disposed in an area corresponding to the second groove 322 .

The 1-1 groove 321a may have a third width d3 defined as a horizontal width and a second height h2 defined as a vertical depth. The third width d3 may be uniform. For example, the third width d3 may be constant without changing the width from the lower surface of the first core 320 toward the upper surface of the first core 320 . Also, the third width d3 may be smaller than the second width d2. For example, the third width d3 may be less than or equal to about 50% of the second width d2. In detail, the third width d3 may be about 20% to about 50% of the second width d2. When the third width d3 is less than about 20% of the second width d2 , a proportional control characteristic between the first core 320 and the plunger 330 may be deteriorated. Accordingly, when the solenoid valve 1000 is opened and closed, an OFF response speed between the first core 320 and the plunger 330 may be delayed due to a large residual magnetic flux density. Also, when the third width d3 exceeds about 50% of the second width d2, the overall output of the solenoid valve 1000 may be reduced. Accordingly, the third width d3 preferably satisfies the above-described range.

Also, the second height h2 may be smaller than the first height h1 defined as the total height of the first core 320 . For example, the second height h2 may be less than or equal to about 50% of the first height h1. In detail, the second height h2 may be about 25% to about 50% of the first height h1. When the second height h2 is less than about 25% of the first height h1 , a proportional control characteristic between the first core 320 and the plunger 330 may be deteriorated. Accordingly, when the solenoid valve 1000 is opened and closed, an OFF response speed between the first core 320 and the plunger 330 may be delayed due to a large residual magnetic flux density. Also, when the third width d3 exceeds about 50% of the second width d2, the overall output of the solenoid valve 1000 may be reduced. Accordingly, the second height h2 preferably satisfies the above-described range.

The 1-2 th groove 321b may be a region formed at an end of the 1-1 th groove 321a. The 1-2 th groove 321b may communicate with the 1-1 th groove 321a. The 1-2 th groove 321b may be a region extending from the end of the 1-1 th groove 321a in the direction of the upper surface of the first core 320 . Based on the horizontal direction, the first-second groove 321b may not overlap the second groove 322 .

The 1-2 grooves 321b may have a fourth width d4 defined as a horizontal width and a third height h3 defined as a vertical depth. The fourth width d4 may be uniform. For example, the fourth width d4 does not change in width from the end of the 1-1 groove 321a of the first core 320 toward the top surface of the first core 320 and is constant. can do. In addition, the fourth width d4 may be smaller than the second width d2 and larger than the third width d3 . For example, the fourth width d4 may be less than or equal to about 60% of the second width d2. In detail, the fourth width d4 may be about 30% to about 60% of the second width d2. Also, the fourth width d4 may be 120% or more of the third width d3. In detail, the fourth width d4 may be about 120% to about 200% of the third width d3. When the fourth width d4 is less than about 120% of the third width d3 , it may be difficult to effectively dispose the gap washer 370 in the first groove 321 . That is, the width of the first-second groove 321b is not significantly different from the width of the first-first groove 321a, so that the gap washer 370 is formed between the first-first groove 321a and the first-first groove 321a. It may be difficult to effectively support the stepped structure formed by the width difference between the first-second grooves 321b. In addition, when the fourth width d4 exceeds about 200% of the second width d2, the overall output of the solenoid valve 1000 and the reliability of the first core 320 may be reduced. . Accordingly, the fourth width d4 preferably satisfies the above-described range.

Also, the third height h3 may be smaller than the first height h1 and the second height h2. For example, the third height h3 may be less than or equal to about 50% of the first height h1. In detail, the third height h3 may be about 20% to about 50% of the second height h2. When the third height h3 is less than about 20% of the second height h2, the gap washer 370 is a step difference between the 1-1 groove 321a and the 1-2 groove 321b. It can be difficult to effectively support the structure. In addition, when the third height h3 exceeds about 50% of the second height h2, a space for supporting the gap washer 370 may be secured, but the The overall output may be lowered. Accordingly, the third height h3 preferably satisfies the above-described range.

Referring to FIG. 5 , the gap washer 370 may be disposed on the first core 320 . The attractive force between the first core 320 and the plunger 330 may be controlled by the gap washer 370 .

The gap washer 370 may include a lower washer 371 , a middle washer 372 , and an upper washer 373 . The lower washer 371 may be disposed on the lower surface of the first core 320 , and the intermediate washer 372 may be disposed in the 1-1 groove 321a of the first core 320 . have. Also, the upper washer 373 may be disposed in the 1-2 th groove 321b of the first core 320 . The lower washer 371 , the middle washer 372 , and the upper washer 373 are integrally formed and may directly contact the first core 320 .

The lower washer 371 may have a fifth width d5 defined as a horizontal width and a fifth height h5 defined as a vertical height. The fifth width d5 is the maximum horizontal width of the gap washer 370 and may be the horizontal width of the lower surface of the gap washer 370 . The fifth width d5 may be less than or equal to the width of the first core 320 . For example, the fifth width d5 may be smaller than or equal to the second width d2 of the first core 320 . In detail, the fifth width d5 may be 80% or more of the second width d2. Preferably, the fifth width d5 may be the same as the second width d2. In this case, the fifth width d5 may be the same as the horizontal width of the upper surface of the plunger 330 facing the gap washer 370 .

Also, the fifth height h5 may be less than or equal to about 40% of the fourth height h4 defined as the total height of the gap washer 370 . For example, the fifth height h5 may be about 10% to about 30% of the fourth height h4. When the fifth height h5 is less than about 10% of the fourth height h4 , a proportional control characteristic between the first core 320 and the plunger 330 may be deteriorated. Accordingly, when the solenoid valve 1000 is opened and closed, an OFF response speed between the first core 320 and the plunger 330 may be delayed due to a large residual magnetic flux density. Also, when the fifth height h5 exceeds about 40% of the fourth height h4, the overall output of the solenoid valve 1000 may be reduced. Accordingly, the fifth height h5 preferably satisfies the above-described range.

The intermediate washer 372 may have a sixth width d6 defined as a horizontal width and a sixth height h6 defined as a vertical height. The sixth width d6 may correspond to the width of the first-first groove 321a. For example, the sixth width d6 may be the same as the third width d3.

Also, the sixth height h6 may be greater than the fifth height h5. The sixth height h6 may be the same as the second height h2. The sixth height h6 may be less than or equal to about 80% of the fourth height h4. For example, the sixth height h6 may be about 40% to about 80% of the fourth height h4.

In addition, the intermediate washer 372 may further have a seventh width d7 defined as a horizontal width. The seventh width d7 may be a horizontal width from the outside of the intermediate washer 372 to the hollow of the gap washer 370 . In this case, the seventh width d7 may be smaller than the eighth width d8 defined as the horizontal width of the hollow of the gap washer 370 . For example, the seventh width d7 may be about 55% to about 95% of the eighth width d8. In detail, the seventh width d7 may be about 65% to 85% of the eighth width d8. When the seventh width d7 is less than about 55% of the eighth width d8, the width of the middle washer 372 is relatively small, so that the overall reliability of the gap washer 370 may be deteriorated. In addition, when the seventh width d7 exceeds about 95% of the eighth width d8, the hollow width (eighth width d8) of the gap washer 370 is relatively small. It may not be easy to control the pressure in the solenoid driving unit 300 using That is, the gap washer 370 according to the embodiment preferably satisfies the sixth width d6, the sixth height h6, and the seventh width d7 in the above-described ranges in consideration of reliability and proportional control characteristics. do.

In addition, the eighth width d8, which is the hollow width of the gap washer 370, has a constant width and is greater than the horizontal width of the through hole formed in the plunger 330, for example, the horizontal width of the first through hole 331a. can be small Accordingly, the embodiment can easily control the pressure in the solenoid driving unit 300 .

The upper washer 373 may have a ninth width d9 defined as a horizontal width and a seventh height h7 defined as a vertical height. The ninth width d9 may correspond to the width of the first groove 321 . For example, the ninth width d9 may be the same as a fourth width d4 that is a horizontal width of the 1-2 th groove 321b. Also, the seventh height h7 may correspond to the height of the first groove 321 . For example, the seventh height h7 may be the same as the third height h3 , which is a vertical height of the 1-2 th groove 321b. Accordingly, the upper washer 373 can be inserted and fixed in the 1-2 th groove 321b, and can be prevented from being separated from the 1-2 th groove 321b.

In addition, the seventh height h7 may be less than or equal to about 40% of the fourth height h4 that is the total height of the gap washer 370 . In detail, the seventh height h7 may be about 10% to about 40% of the fourth height h4. Also, the seventh height h7 may be greater than the fifth height h5 . The seventh height h7 may be 120% or more of the fifth height h5. In detail, the seventh height h7 may be about 120% to about 200% of the fifth height h5. Accordingly, the upper washer 373 may be fixedly disposed at a set position within the first groove 321 of the first core 320 .

That is, as described above, the first core 320 and the gap washer 370 according to the embodiment may satisfy the set horizontal width and height. Accordingly, the gap washer 370 may be disposed while maintaining a set position on the first core 320 , and the proportional control characteristic between the first core 320 and the plunger 330 may be improved. have.

Therefore, when the solenoid valve 1000 is closed after being opened, it is possible to prevent the OFF response speed between the first core 320 and the plunger 330 from being delayed by the residual magnetic flux density, and , it is possible to prevent the output from being lowered and to control the opening and closing of the connection part.

6 is another cross-sectional view in which the housing is omitted in the solenoid valve according to the embodiment.

In the description using FIG. 6 , descriptions of the same and similar components as those of the solenoid valve described above are omitted, and the same reference numerals are assigned to the same and similar components.

6 to 8 , the solenoid driving unit 300 may omit the above-described second sealing member 390 . Also, the first core 320 may omit the second groove 322 for disposing the second sealing member 390 .

The first core 320 may be disposed on the plunger 330 . The first core 320 may include a partition wall portion 320a disposed on a lower surface thereof. The partition wall part 320a may have a shape protruding toward the plunger 330 around the edge of the lower surface of the first core 320 .

The first core 320 may include a recess formed by the partition wall portion 320a. That is, the recess of the first core 320 may have a concave shape as an area on the lower surface of the first core 320 in which the partition wall portion 320a is not formed. When the plunger 330 moves in the vertical direction by the applied driving force, a portion of the plunger 330 may be inserted into the recess of the first core 320 . To this end, the horizontal width of the recess may be greater than or equal to the horizontal width of the plunger 330 . In addition, when the solenoid driving unit 300 operates at the maximum output, the plunger 330 may contact the gap washer 370 , and the uppermost surface of the plunger 330 is the lowermost end of the partition wall portion 320a. It may be disposed above.

The above-described first groove 321 may be formed in the central region of the recess, and the above-described gap washer 370 may be disposed in the recess. In this case, the partition wall part 320a may have a height higher than the height of the lower washer 371 (the fifth height h5). In addition, the lowermost end of the partition wall portion 320a may be disposed below the lowermost end 385a of the second core 385 . Also, the lowermost end of the partition wall portion 320a may be disposed below the lowermost end of the gap washer 370 .

In addition, the second core 385 may be disposed on the outer periphery of the first core 320 . The second core 385 may be disposed between the coil unit 310 and the first core 320 . The second core 385 may extend in a vertical direction between the first core 320 and the bobbin 311 .

One region of the second core 385 may be disposed between the bobbin 311 and the first core 320 . For example, the lowermost end 385a of the second core 385 may be disposed between the bobbin 311 and the first core 320 . In this case, the lowermost end 385a of the second core 385 may be positioned above the lowermost end of the partition wall portion 320a. In addition, the lowermost end 385a of the second core 385 may be disposed above the lowermost surface of the gap washer 370 , and may be disposed below the uppermost portion of the gap washer 370 .

Accordingly, the embodiment can effectively control the plunger 330 . For example, as the protrusion 320a of the first core 320 and the second core 385 are disposed at a set position, the cores 320 and 385 are balanced by the plunger 330 when power is applied. can be controlled to maintain and move.

The guide member 340 may be disposed between the coil unit 310 and the plunger 330 . The guide member 340 may be disposed in a region corresponding to the first core 320 . In detail, the end 342a of the extension portion 342 of the guide member 340 may be disposed in a region overlapping the partition wall portion 320a of the first core 320 in the vertical direction (z-axis direction).

The guide member 340 may be connected to the first core 320 . In detail, the end 342a of the extension part 342 may be coupled to the partition wall part 320a of the first core 320 . For example, the end 342a of the extension part 342 may be physically connected to the partition wall part 320a through welding or the like.

That is, in the embodiment, the end 342a of the extension 342 and the lowermost end of the partition wall 320a may be located lower than the lower surface of the gap washer 370 . Accordingly, it is possible to prevent the gap washer 370 from being damaged or deformed in the process of connecting the boundary between the extension part 342 and the partition wall part 320a by welding or the like.

In addition, the first core 320 may have the aforementioned widths d1, d2, d3, and d4 and the aforementioned heights h1, h2, and h3, and the gap washer 370 also has the aforementioned width d5. , d6, d7, d8, d9) and the aforementioned heights (h4, h5, h6, h7).

Accordingly, in the embodiment, when the solenoid valve 1000 is opened and then closed, the OFF response speed between the first core 320 and the plunger 330 is delayed by the residual magnetic flux density. can be prevented, the output is prevented from being lowered, and the opening and closing of the connection part can be controlled.

9 and 10 are graphs of a change in force according to a stroke in a solenoid valve according to a comparative example, and FIG. 11 is a force according to a stroke in a solenoid valve according to an embodiment is a graph of the change in

Hereinafter, the operation and effect of the present invention will be described in more detail through comparative examples and examples.

Comparative Example 1

A solenoid valve for a fuel cell was manufactured by forming a solenoid driving part and a cover member on a housing including a connection part.

In this case, the solenoid driving unit includes a coil unit forming a magnetic field, a first core magnetized to the formed magnetic field, a plunger moving up and down according to an attractive force with the first core, and a guide member for guiding the plunger. In addition, the lower surface of the first core facing the plunger was provided flat without forming a groove (the first groove described above).

Thereafter, a driving force was applied to the solenoid driving unit to measure a force (force) formed between the two components according to a stroke distance between the first core and the plunger.

Comparative Example 2

A solenoid valve was manufactured in the same manner as in Comparative Example 1.

At this time, a groove (the first groove 321 described above) was formed in the central region of the lower surface of the first core facing the plunger.

Thereafter, a driving force was applied to the solenoid driving unit to measure a force (force) formed between the two components according to a stroke distance between the first core and the plunger.

Example

A solenoid valve was manufactured in the same manner as in Comparative Example 2.

At this time, a plastic gap washer (above-described gap washer 370) was formed between the first core and the plunger, and a solenoid valve was formed such that the gap washer is disposed on the lower surface of the first core and in the groove. .

Thereafter, a driving force was applied to the solenoid driving unit to measure a force (force) formed between the two components according to a stroke distance between the first core and the plunger.

9 to 11, when no driving force is applied to the solenoid driving unit 300, the interval between the first core 320 and the plunger 330 is about 4 mm, and the opening and closing member 335 is It may be in contact with an end of the first connection part 110 and may shield the first connection part 110 .

In addition, when a driving force is applied to the solenoid driving unit 300 , the plunger 330 moves in an upward direction, for example, the first core 320 by the attractive force between the first core 320 and the plunger 330 . can move towards A stroke between the first core 320 and the plunger 330 may gradually decrease.

At this time, referring to FIGS. 9 and 10 for the comparative example, in the solenoid valve 1000 according to the comparative example, the closer the distance between the first core 320 and the plunger 330 is, the greater the force is. formation can be seen. In detail, in an area where the first core 320 and the plunger 330 are adjacent, for example, in an area where the stroke interval between the two components 320 and 330 is about 2 mm or less, the closer between the two components 320 and 330 It can be seen that the force increases rapidly.

In this case, when the opened solenoid valve 1000 is closed again (changed from 0 stroke (mm) to 4 stroke (mm)), by the residual magnetic flux density having a suction force greater than the restoring force of the elastic member 360 An OFF response speed between the first core 320 and the plunger 330 may be delayed. Accordingly, the proportional control characteristic between the first core 320 and the plunger 330 may be deteriorated.

On the other hand, referring to FIG. 11 , the solenoid valve 1000 according to the embodiment may include a gap washer 370 disposed between the first core 320 and the plunger 330 as shown in FIG. 6 . Accordingly, even when the first core 320 and the plunger 330 are adjacent to each other, it can be seen that a relatively uniform force is formed between the two components 320 and 330 .

In detail, as the gap washer 370 having a predetermined thickness h5, for example, about 2 mm thickness h5, is disposed between the first core 320 and the plunger 330, the two components 320, Even when an attractive force occurs between the 330 , the first core 320 and the plunger 330 may be spaced apart from each other by a predetermined distance.

That is, in the embodiment, as compared with the comparative example, as the gap washer 370 is disposed in an area where the force rapidly increases, the slope value in the graph for the stroke and the force rapidly increases. It is possible to remove the section (0 stroke to about 2 stroke (mm) section indicated as a pattern in FIG. 11).

Accordingly, even when the plunger 330 approaches the first core 320 , the force between the two components may be relatively uniform without rapidly increasing, and thus, the residual magnetic flux between the two components. Density can be controlled.

Therefore, in the embodiment, when the solenoid valve 1000 is opened and closed again, the OFF response speed between the first core 320 and the plunger 330 is prevented from being delayed by the residual magnetic flux density. It is possible to improve the proportional control characteristic between the first core 320 and the plunger 330 . In addition, the solenoid valve 1000 according to the embodiment has a faster response speed and can precisely control the opening and closing of the connection part.

12 is a perspective view of a vehicle to which an integrated discharge valve for a fuel cell according to an embodiment is applied.

Referring to FIG. 12 , the solenoid valve 1000 for a fuel cell according to the embodiment may be applied to a hydrogen supply device including a hydrogen supply unit, and the hydrogen supply device may be applied to a vehicle 2000 . The hydrogen supply device includes the above-described hydrogen tank, the fuel cell solenoid valve 1000 , a first pipe (not shown) connecting the hydrogen tank and the inlet 101 of the solenoid valve 1000 , and the solenoid valve 1000 . ) may include a second pipe (not shown) connecting the outlet 102 and the fuel cell stack.

Hydrogen from the hydrogen tank may be provided to the solenoid valve 1000 for a fuel cell through the first pipe, and the hydrogen flows through the solenoid valve 1000 and then to the fuel cell stack through the second pipe. can be provided. The hydrogen supply device may be applied to various applications based on fuel cells as well as the vehicle 2000 using a fuel cell as a power source as shown in FIG. 12 .

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiment has been described above, it is merely an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are exemplified above in a range that does not depart from the essential characteristics of the present embodiment. It can be seen that various modifications and applications that have not been made are possible. For example, each component specifically shown in the embodiment can be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (7)

a housing including an inlet through which a fluid is introduced and an outlet through which the fluid is discharged;
a connection part disposed in the housing and disposed between the inlet port and the outlet port; and
It is disposed on the connection part and includes a solenoid driving part for opening and closing the connection part,
The solenoid driving unit,
a coil unit that forms a magnetic field according to applied power;
a first core disposed on the coil unit and magnetized in a magnetic field formed by the coil unit;
a plunger disposed in the hollow of the coil unit and provided to be movable in a vertical direction;
an opening and closing member disposed on a lower surface of the plunger and opening and closing the connection part;
a guide member disposed between the coil unit and the plunger and guiding the movement of the plunger;
a support member disposed on a lower surface of the plunger;
an elastic member disposed between the guide member and the support member; and
and a gap washer disposed between the first core and the plunger and comprising a resin material,
The first core includes a first groove formed on a lower surface facing the plunger,
The first groove is
a 1-1 groove formed on a lower surface of the first core; and
and a 1-2-th groove formed at the end of the 1-1-th groove,
The horizontal width of the 1-1 groove is smaller than the horizontal width of the 1-2 groove,
The gap washer is disposed on a lower surface of the first core and in the first groove,
The gap washer,
a lower washer disposed on a lower surface of the first core;
an intermediate washer disposed in the 1-1 groove; and
and an upper washer disposed in the 1-2 groove;
The lower washer has the same horizontal width as the lower surface of the first core,
The middle washer has the same horizontal width as the 1-1 groove,
The upper washer has the same horizontal width as the 1-2 groove,
The height of the lower washer is 40% or less of the total height of the gap washer solenoid valve for a fuel cell. The method of claim 1,
A height of the 1-1 groove is greater than a height of the 1-2 groove solenoid valve for a fuel cell. The method of claim 1,
The horizontal width of the 1-1 groove is 50% or less of the horizontal width of the lower surface of the first core,
The vertical height of the 1-1 groove is 50% or less of the total vertical height of the first core solenoid valve for a fuel cell. The method of claim 1,
The first core and the plunger are spaced apart from each other by the gap washer solenoid valve for a fuel cell. The method of claim 1,
The guide member includes an extension portion disposed between the coil portion and the plunger,
The end of the extension part is disposed between the first core and the coil part and is disposed in a region overlapping the first core in a horizontal direction. The method of claim 1,
The guide member,
a support part disposed between the housing and the coil part; and
An extension portion disposed between the coil portion and the plunger,
The solenoid driving unit,
a sealing member disposed between the first core and the extension; and
Further comprising a second core disposed between the coil unit and the first core,
The lowermost end of the second core is a solenoid valve for a fuel cell disposed below the lowermost surface of the first core. In a vehicle comprising a hydrogen supply device,
The hydrogen supply device is a vehicle including the solenoid valve for a fuel cell according to any one of claims 1 to 6.

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