KR20220132404A - A fuel cell solenoid valve having a plunger guide with excellent fluid flow and durability, and a fuel supply device including the same - Google Patents

Abstract

An embodiment of the present invention relates to a fuel supply device including a fuel cell solenoid valve having a plunger guide with excellent fluid flowability and durability. The fuel cell solenoid valve having a plunger guide with excellent fluid flowability and durability according to one embodiment of the present invention may comprise: a housing including an inlet into which fluid is introduced, a fluid flow path through which fluid flows, and an outlet through which the fluid is discharged; a pilot and a plunger which are arranged on the housing, and open and close the fluid flow path; a core shaft which has the pilot and the plunger arranged therein; a pilot cap which is coupled to the lower side of the pilot and the lower side of the plunger; and a plunger guide which is coupled to the core shaft, and surrounds the plunger and the pilot cap. Therefore, the displacement of a plunger may be prevented.

Description

A fuel cell solenoid valve having a plunger guide with excellent fluid flow and durability, 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 a plunger guide having excellent fluid flow and durability, and a fuel supply device including the same.

Due to global warming on environmental pollution, interest in environmental protection is increasing worldwide. Among them, air pollution, which is 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 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 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 binds to hemoglobin in the human body and interferes with the oxygen supply in the body. In addition, fine dust includes 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 car 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 receiving 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 to control the amount of supplied hydrogen. . The hydrogen shutoff valve and the hydrogen supply valve may include a solenoid driving unit for controlling a flow amount of a flowing fluid by opening or closing the valve by an applied power or by adjusting an opening degree.

For example, when power is applied to the hydrogen shut-off valve, the plunger and the pilot rise according to the applied power, so that the hydrogen shut-off valve is opened, and the inflow fluid may be discharged to the hydrogen supply valve.

On the other hand, the fuel supply device has a structure in which a solenoid valve for a fuel cell is assembled in a predetermined holder, and when an abnormality occurs in the solenoid valve for a fuel cell, the solenoid valve for a fuel cell is replaced in the holder.

However, according to the prior art, there is a problem in that the plunger inserted into the predetermined yoke is detached in the process of assembling the solenoid valve for the fuel cell to the holder.

On the other hand, according to the internal technology, when the plunger separation prevention structure is formed or additionally arranged, a technical contradiction occurs that prevents the flow of fluid flowing into the pilot or the plunger.

In particular, the plunger separation prevention structure according to the internal technology causes difficulties in the manufacturing process and noise due to friction with the fluid, and as the plunger separation prevention structure interferes with the flow of the fluid, the rotational movement of the fluid in the fluid inlet causes the flow in the opposite direction to the mainstream As a result, a vortex, which is a swirling flow, is generated, resulting in a technical problem in which the flow rate performance is rapidly deteriorated.

In addition, as the plunger escape prevention structure obstructs the fluid flow, when the fluid pressure falls below the minimum pressure difference, the valve may be closed. That is, the supply pressure is lowered due to the obstruction of the fluid flow by the plunger separation prevention structure, which may cause unnecessary blockage or may cause a problem in that it does not work properly.

On the other hand, according to the internal technology, the solenoid valve for a fuel cell uses the elastic force of an elastic member such as a predetermined spring to return the plunger or the pilot. 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 in the lateral direction as well as upward or downward pressure.

However, in the internal technology, as the elastic member is merely disposed inside the core shaft, the support in the lateral direction is not properly performed, so there is a problem that a stable blocking operation cannot be performed by the member of the side guide structure of the elastic member.

In addition, in the solenoid valve for fuel cell according to the internal technology, there is a problem in that the increase or decrease of the compressive load of the spring cannot respond when necessary as the position at which the elastic member is mounted is fixed. In particular, when the compressive load of the spring becomes larger than necessary, there is a problem in that the power consumption increases in the solenoid valve. In the case of power consumption, if the solenoid valve continuously consumes power of 2W or more, 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 plunger guide having excellent fluid flow and durability that can prevent the plunger from being separated without interfering with the flow of the inflowing fluid, and a fuel supply device including the same it is ham

In addition, one of the technical problems of the embodiment is a solenoid valve for a fuel cell having a plunger guide having excellent fluid flow and durability, which can solve the problem that a stable shut-off operation cannot be performed due to the absence of a side guide structure of an elastic member, and a fuel including the same To provide a supply device.

In addition, one of the technical problems of the embodiment is, in the solenoid valve for a fuel cell, as the position at which the elastic member is mounted is fixed, when the compressive load of the spring increases more than necessary, the power consumption to the solenoid valve increases. Fluid flow that can solve the problem An object of the present invention is to provide a solenoid valve for a fuel cell having a plunger guide with excellent performance and durability, and a fuel supply device including the same.

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

A solenoid valve for a fuel cell having a plunger guide having excellent fluid flow and durability according to an embodiment includes a housing including an inlet through which a fluid flows, a fluid passage through which the fluid flows, and an outlet through which the fluid is discharged; a pilot and a plunger for opening and closing, a core shaft having the pilot and the plunger disposed therein, a pilot cap coupled to a lower side of the pilot and a lower side of the plunger, and the core shaft coupled to the plunger and a plunger guide surrounding the pilot cap.

The core shaft may include a core body and a core extension extending laterally from the core body.

The plunger guide may be coupled to the core extension.

A plunger protrusion provided on the plunger guide may be coupled to a core recess provided at a lower end of the core extension part of the core shaft.

The plunger guide includes a hollow guide body, an upper locking part disposed around the upper side of the guide body, a plurality of inner protrusions slanted to the lower side of the guide body, and a plurality of inner protrusions disposed between the plurality of inner protrusions fluid flow through.

The fluid flow-through portion of the plunger guide may at least partially coincide with the fluid inlet of the housing in an axial direction.

The embodiment may further include an elastic member disposed between the pilot cap and the plunger guide.

An outer surface of the elastic member may be disposed inside the plunger guide.

The plunger may have a plunger step below its outer diameter, and the pilot cap may include a cap groove around the plunger.

Further comprising an elastic adjustment part for supporting the elastic member, the elastic adjustment part may be selectively disposed in the plunger step or the cap groove.

The plunger may include a plunger damper disposed therein.

The plunger damper may include a curved damper whose upper side is convex upward.

The fuel supply device according to the embodiment may include a solenoid valve for a fuel cell having a plunger guide having excellent fluid flow properties and durability.

The core shaft may include a core body and a core extension extending laterally from the core body.

The core shaft may include a first core recess inside the lower end of the core extension.

The plunger guide may include a hollow guide body, a plunger protrusion disposed on one side of the guide body, and a fluid flow-through portion penetrating a side surface of the guide body.

The plunger protrusion may be coupled to the first core recess.

The fluid flow-through portion of the plunger guide may at least partially coincide with the fluid inlet of the housing in an axial direction.

According to the solenoid valve for a fuel cell having a plunger guide having excellent fluid flow and durability according to the embodiment and a fuel supply device including the same, there is a technical effect that can prevent the plunger from being separated without interfering with the flow of the flowing fluid. .

For example, according to the embodiment, it may include a plunger guide 1390 that firmly guides and supports the plunger 1330 . In addition, the plunger guide 1390 has a technical effect that can also firmly guide or support the pilot cap 1350 and the elastic member 1360 .

In addition, according to the embodiment, the fluid flow-through portion 1390F of the plunger guide 1390 is positioned at a position corresponding to the inlet 1101 of the housing 1100 to prevent the plunger from being separated without interfering with the flow of the inflowing fluid. There are special technical effects that can be done.

In addition, in the embodiment, the plunger protrusion 1390P of the plunger guide 1390 functioning as a guide stopper is coupled to the core recess 1320R of the core extension 1322 so that the fluid flow through portion 1390F of the plunger guide 1390 is There is a special technical effect that can be controlled to at least partially coincide with the fluid inlet 1101 of the housing.

Next, according to the embodiment, there is a technical effect that can prevent a problem in the stable blocking operation due to the member of the side guide structure of the elastic member.

For example, according to the embodiment, as the plunger guide 1390 firmly guides or side-supports not only the plunger 1330 but also the elastic member 1360, there is a technical effect that enables stable performance as a solenoid valve. In addition, the embodiment has a complex special technical effect that can prevent the plunger from being separated without interfering with the flow of the incoming fluid by providing the plunger guide 1390 .

Next, according to the embodiment, in the solenoid valve for a fuel cell, as the position at which the elastic member is mounted is fixed, when the compressive load of the spring increases more than necessary, there is a technical effect that can solve the problem of increased power consumption to the solenoid valve. .

For example, according to the embodiment, the elastic member 1360 as the elastic adjustment unit 1355, which functions to fix the position and guide the elastic member 1360, is selectively disposed in the plunger step 1330S or the cap groove 1350H. ), there is a special technical effect that can reduce the power consumption of the solenoid valve because it can control the compression load.

For example, according to the embodiment, as shown in FIG. 9 , the plunger 1330 of the embodiment may have a plunger step 1330S below the outer diameter, and the pilot cap 1350 may include a cap groove 1350H on the periphery. can Through this, the elastic control unit 1355 selects an assembly position in the area from the plunger 1330 to the pilot cap 1350 as it is selectively disposed in the plunger step 1330S or the cap groove 1350H to elastically There is a special technical effect of adjusting the compressive load of the member 1360 .

Next, the plunger damper having a curved damper according to the embodiment can secure the plunger area (magnetic force generation area) while securing the damper area for noise reduction, so there is a special technical effect that can increase the solenoid suction force.

In addition, the plunger damper having a curved damper according to the embodiment has a curved shape rather than a simple upwardly extended shape, so even if the height of the damper is increased, horizontal deformation of the damper is possible, thereby securing the movement distance of the plunger. It works. As a result, horizontal deformation is possible by the curved damper, and the deformation time is reflected in the contact time. There is a complex technical effect that can secure the plunger area.

The technical effects of the embodiments are not limited to those described in this item, and 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.
2 and 3 are partial cross-sectional views of the solenoid valve 2000 according to the embodiment shown in FIG. 1 .
4A is a partial perspective view of a solenoid valve 2000 according to an embodiment.
Figure 4b is an exploded perspective view of the solenoid valve 2000 according to the embodiment shown in Figure 4a.
5 is a perspective view of a plunger guide 1390 in a solenoid valve 2000 according to an embodiment.
FIG. 6 is an enlarged view of a first area C1 of the solenoid valve 2000 according to the embodiment shown in FIG. 3 .
7 is a partially enlarged view of a second region C2 of the solenoid valve 2000 according to the embodiment shown in FIG. 2 .
8 is a partially exploded perspective view of the solenoid valve 2000 according to the embodiment shown in FIG. 4A.
9 is a perspective view in which the elastic member 1360, the elastic adjustment unit 1355, and the plunger guide 1390 are omitted in the solenoid valve 2000 according to the embodiment shown in FIG.
10A is a perspective view in which the elastic adjustment unit 1355 is disposed in the cap groove 1350H of the pilot cap 1350 in the solenoid valve according to the embodiment;
Figure 10b is a perspective view in which the elastic adjustment unit 1355 is disposed on the plunger step 1330S in the solenoid valve according to the embodiment.
11A is a cross-sectional view (C1) in which the elastic control unit 1355 is disposed in the cap groove 1350H of the pilot cap 1350 in the solenoid valve according to the embodiment as shown in FIG. 10A.
11b is a cross-sectional view (C12) in which the elastic adjustment unit 1355 is disposed on the plunger step 1330S in the solenoid valve according to the embodiment as shown in FIG. 10b.
12 is an exploded perspective view of the cover member 1400, the core shaft 1320, and the plunger guide 1390 in the solenoid valve according to the embodiment.
13A is a partial perspective view showing a core shaft 1320, a plunger guide 1390, and a pilot cap 1350 coupled to the cover member 1400 in the solenoid valve according to the embodiment;
Fig. 13B is a bottom perspective view of a partial perspective view of the solenoid valve according to the embodiment shown in Fig. 13A;
Fig. 13C is a right side perspective view of a partial perspective view of the solenoid valve according to the embodiment shown in Fig. 13A;
14 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, preferred embodiments that can solve the technical problems of the embodiments 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 between 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 this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "and (and) at least one (or one or more) of B and C", it can be combined with A, B, and 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 for distinguishing 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 under (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 “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, and FIGS. 2 and 3 are partial cross-sectional views of the solenoid valve 2000 according to the embodiment shown in FIG. 1 .

Hereinafter, the 'solenoid valve 2000 for a fuel cell having a plunger guide having excellent fluid flow and durability according to the embodiment' will be briefly referred to as a 'solenoid valve 2000 according to the embodiment'.

First, referring to FIG. 1 , the solenoid valve 2000 according to the embodiment may be connected to a hydrogen tank (not shown). For example, the solenoid valve 2000 for a fuel cell may be disposed between a hydrogen tank and a stack (not shown) of the fuel cell.

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.

Referring to FIG. 1 , the solenoid valve 2000 according to the embodiment 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 the hydrogen tank and the hydrogen supply valve.

The housing 1100 may include a material having a predetermined strength and excellent reliability. For example, the housing 1100 may be made of a resin material including a metal or a thermoplastic resin material.

For example, the housing 1100 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 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 and insert injection, and may be provided in various sizes and shapes to have improved design freedom.

Next, the cover member 1400 may be disposed on the housing 1100 . The cover member 1400 may include an open lower region and an accommodating space therein. The solenoid driving unit 1300 (refer to FIG. 2 ) to be described later may be inserted through the lower region of the cover member 1400 to be disposed in the accommodation space.

The cover member 1400 may include a material having a predetermined strength and having excellent reliability with respect to the external environment. For example, the cover member 1400 may include at least one of a metal, a ceramic, and a 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 . The cover member 1400 may prevent the solenoid driving unit 1300 from being exposed to the outside while fixing the solenoid driving unit 1300 to a set position.

Next, FIGS. 2 and 3 are partial cross-sectional views of the solenoid valve 2000 according to the embodiment shown in FIG. 1 . Specifically, FIG. 2 is a partial cross-sectional view taken along line A1-A1' of the solenoid valve 2000 according to the embodiment shown in FIG. 1, and FIG. 3 is a solenoid valve 2000 according to the embodiment shown in FIG. is a detailed view of

First, referring to FIG. 2 , the solenoid valve 2000 according to the embodiment includes a housing 1100 , a cover member 1400 disposed on the housing 1100 , and between the housing 1100 and the cover member 1400 . It may include a core shaft 1320 , a plunger 1330 , a pilot 1370 , an elastic member 1360 , and a solenoid driving unit 1300 disposed on the . The solenoid driving unit 1300 may include a coil unit 1310 and a yoke 1305 .

The housing 1100 may include an inlet 1101 and an outlet 1102 of a fluid. Also, a fluid flow path 1103 through which the 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 therein.

The inlet 1101 is an inlet through which a 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.

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

The inlet 1101 and the outlet 1102 may be spaced apart from each other and disposed on the 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 . The housing 1100 may include an O-ring 1321 under the fluid inlet 1101 , the outlet 1102 , or the core shaft 1320 .

As described above, according to the internal technology, when the plunger escape prevention structure is formed or additionally arranged, the flow rate performance due to the vortex is sharply reduced as the flow of the inflowing fluid is disturbed, and the supply pressure is lowered to block unnecessary valves. or the valve does not operate normally.

Technical features of the embodiment for solving these technical problems will be described in detail later with reference to FIGS. 4A to 6 .

Next, the solenoid valve 2000 according to the embodiment can control the positions of the plunger 1330 and the pilot 1370 by the power applied from the terminal 1301, and selectively open and close the fluid flow path 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 , a plunger 1330 , and the like 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 the 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 in the coil unit 1310 . The core shaft 1320 may be disposed in the bobbin 1311 . A part of the core shaft 1320 may be inserted and disposed in the hollow of the bobbin 1311 . The core shaft 1320 may include a magnetic material and may be magnetized in a magnetic field formed by the coil unit 1310 .

Next, the plunger 1330 may be disposed in the hollow of the core shaft 1320 to be vertically movable. The plunger 1330 may be movable in the vertical direction by the magnetic force of the core shaft 1320, and the pilot 1370 coupled to the lower side of the plunger 1330 selectively opens and closes the fluid flow path 1103 while moving up and down. can do.

Next, the pilot 1370 is formed of a material having an elastic force and may include an opening/closing member 1372 capable of opening and closing the fluid passage 1103 . For example, the opening and closing member 1372 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 the like, or a rubber material having elasticity. may include at least one of

The opening/closing member 1372 may be disposed in a central region of a lower surface of the pilot 1370 . For example, when the solenoid driving unit 1300 does not operate (power is turned off), an attractive force may not be generated between the core shaft 1320 and the plunger 1330 . Accordingly, the opening/closing member 1372 may be elastically deformed in contact with 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.

In addition, when the solenoid driving unit 1300 operates and the core shaft 1320 is magnetized (power is on), the plunger 1330 moves upward so that the opening/closing member 1372 is a fluid flow path 1103 . may be spaced apart from the upper end of the Accordingly, the solenoid valve 2000 may be opened so that the fluid may be discharged through the outlet 1102 through the fluid passage 1103 .

The 'C2 region' of FIG. 2 will be described in detail later based on FIG. 7 .

Next, FIG. 3 is a detailed view of the solenoid valve 2000 according to the embodiment shown in FIG. 2 .

Referring to FIG. 3 , the embodiment may include a guide member 1340 surrounding the plunger 1330 . The guide member 1340 may be formed of a non-magnetic material, but is not limited thereto.

The guide member 1340 may include a hollow. A hollow of the guide member 1340 may be formed in a central region of the guide member 1340 , and the hollow may be a hole for inserting the plunger 1330 . The guide member 1340 may guide the movement of the plunger 1330 .

Also, in particular, the embodiment may include at least one of a pilot cap 1350 , an elastically variable support 1355 , and a plunger guide 1390 . In addition, the core shaft 1320 of the embodiment may include a core body 1321 and a core extension 1322 .

The elastic member 1360 may be disposed on the elastically variable support 1355 .

The upper end of the elastic member 1360 may be in contact with the inner upper surface 1322T of the core extension 1322, and the lower end of the elastic member 1360 may be in contact with the upper surface of the elastically variable support 1355, The outer side of the side of the elastic member 1360 may be disposed inside the plunger guide 1390 .

The elastic member 1360 may be disposed to surround a lower circumference of the plunger 1330 and may be provided to be elastically deformable in an upper or lower 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 elastically deform upward to open the fluid flow path 1103 . Also, when no driving force is applied, the pilot 1370 coupled to the plunger 1330 may be pushed downward to close the fluid flow path 1103 .

The 'region C1' of FIG. 3 will be described in detail later based on FIG. 6 .

Next, Figure 4a is a partial perspective view of the solenoid valve 2000 according to the embodiment.

For example, FIG. 4A may be a perspective view in which the cover 1400 , the solenoid driving unit 1300 , and the housing 1100 are omitted from the configuration of the solenoid valve 2000 shown in FIG. 3 .

4B is an exploded perspective view of the solenoid valve 2000 according to the embodiment shown in FIG. 4A , and FIG. 5 is a perspective view of the plunger guide 1390 in the solenoid valve 2000 according to the embodiment.

Referring to FIG. 4A , the solenoid valve 2000 according to the embodiment includes a core shaft 1320 , an elastic member 1360 , an elastic variable support 1355 , a pilot 1370 , a pilot cap 1350 , and an opening/closing member 1372 . ) and a plunger guide 1390 .

Referring to FIG. 4B , the core shaft 1320 of the embodiment may include a core body 1321 and a core extension portion 1322 extending from the lower side of the core body 1321 to the side.

The core shaft 1320 may include a core recess 1320R at a lower end of the core extension 1322 .

In addition, the plunger guide 1390 of the embodiment may include a plunger protrusion 1390P. The plunger protrusion 1390P may be coupled to the core recess 1320R.

Next, Figure 5 is a perspective view of the plunger guide 1390 in the solenoid valve 2000 according to the embodiment.

The plunger guide 1390 according to the embodiment includes a hollow guide body 1391 , an upper engaging portion 1393 , a plurality of inner protrusions 1392 slanting inwardly round, and a plurality of inner protrusions 1392 . It may include a fluid flow-through portion 1390F and a guide recess 1390R that are disposed.

The upper locking part 1393 of the plunger guide 1390 may be firmly coupled to the inner groove of the core extension part 1322 .

The inner protrusion 1392 of the plunger guide 1390 may firmly guide and support the pilot cap 1350 , the elastic member 1360 and the plunger 1330 .

The fluid flow-through portion 1390F of the plunger guide 1390 is positioned at a position corresponding to the inlet 1101 of the housing 1100, so that the plunger can be prevented from disengaging without interfering with the flow of the inflowing fluid. It works.

In the embodiment, the plunger protrusion 1390P of the plunger guide 1390 is coupled to the core recess 1320R of the core extension 1322, so that the fluid flow through portion 1390F of the plunger guide 1390 is connected to the fluid inlet (1390F) of the housing. 1101), there is a technical effect that can be controlled to coincide with the axial direction.

Next, FIG. 6 is an enlarged view of the first region C1 of the solenoid valve 2000 according to the embodiment shown in FIG. 3 .

One of the technical problems of the embodiment is to provide a solenoid valve for a fuel cell having a plunger guide having excellent fluid flow and durability that can prevent the plunger from being separated without interfering with the flow of the inflowing fluid, and a fuel supply device including the same it is ham

For example, according to the internal technology, when the plunger separation prevention structure is formed or additionally disposed, there is a technical problem that prevents the flow of fluid flowing into the pilot or the plunger.

In particular, the plunger separation prevention structure according to the internal technology causes difficulties in the manufacturing process and noise due to friction with the fluid, and as the plunger separation prevention structure interferes with the flow of the fluid, the rotational movement of the fluid in the fluid inlet causes the flow in the opposite direction to the mainstream There is a technical problem in that the flow performance due to the vortex, which is a swirling flow, rapidly deteriorates.

Also, as the plunger escape prevention structure obstructs the flow of the fluid, the valve closes when the pressure drops below the minimum pressure difference. That is, the supply pressure is lowered due to the obstruction of the fluid flow due to the plunger separation prevention structure, which may cause unnecessary blockage or may cause a problem in that stable operation is not possible.

According to the embodiment, it may include a plunger guide 1390 that firmly guides and supports the plunger 1330 . In addition, the plunger guide 1390 has a technical effect that can also firmly guide or support the pilot cap 1350 and the elastic member 1360 .

In addition, according to the embodiment, the fluid flow-through portion 1390F of the plunger guide 1390 is positioned at a position corresponding to the inlet 1101 of the housing 1100 to prevent the plunger from being separated without interfering with the flow of the inflowing fluid. There are special technical effects that can be done.

In addition, in the embodiment, the plunger protrusion 1390P of the plunger guide 1390 functioning as a guide stopper is coupled to the core recess 1320R of the core extension 1322 so that the fluid flow through portion 1390F of the plunger guide 1390 is There is a special technical effect that can be controlled to at least partially coincide with the fluid inlet 1101 of the housing.

Through this, the solenoid valve 2000 according to the embodiment has a technical effect of preventing the plunger from being separated without interfering with the flow of the inflowing fluid.

In addition, one of the technical problems of the embodiment is a solenoid valve for a fuel cell having a plunger guide having excellent fluid flow and durability that can prevent a stable shutoff operation due to the absence of a side guide structure of an elastic member, and fuel including the same To provide a supply device.

For example, according to the internal technology, a solenoid valve for a fuel cell uses the elastic force of an elastic member such as a predetermined spring to return the plunger or pilot. In this case, the elastic member is subjected to considerable pressure, and is subjected to considerable pressure in the lateral direction as well as in the vertical direction.

However, in the internal technology, as the elastic member is merely disposed inside the core shaft, the support in the lateral direction is not properly performed, so there is a problem in that stable operation cannot be performed because there is no side guide structure of the elastic member.

According to the embodiment, as the plunger guide 1390 firmly guides or side-supports not only the plunger 1330 but also the elastic member 1360, there is a technical effect that enables stable performance as a solenoid valve. In addition, the embodiment has a complex special technical effect that can prevent the plunger from being separated without interfering with the flow of the incoming fluid by providing the plunger guide 1390 .

Next, FIG. 7 is a partially enlarged view of the second region C2 of the solenoid valve 2000 according to the embodiment shown in FIG. 2 .

According to the internal technology, when the solenoid is operated, operating noise is generated due to the contact between the plunger and the core shaft, and a damper is installed inside the plunger to reduce noise. However, as the damper mounting area increases, there is a technical problem in that the solenoid suction force is reduced because the plunger area (magnetic force generation area) is reduced, which is advantageous for noise reduction.

On the other hand, according to the internal technology, there was no attempt to extend the damper in the upward direction of the plunger to secure the damper area while maintaining the plunger area. There is a technical problem.

The plunger damper 1335 according to the embodiment may be insert-injected into the plunger 1330 , and an upper damper structure 1335a disposed above the plunger 1330 , a lower damper structure 1335c disposed below the plunger 1330 ) and an intermediate damper structure 1335b disposed between the upper damper structure 1335a and the lower damper structure 1335c.

The embodiment may include a curved damper 1335R in which the upper side of the upper damper structure 1335a is convex upward in order to solve the above technical problem. The curved damper 1335R may have a half-moon structure, but is not limited thereto.

The plunger damper 1335 having a curved damper 1335R according to the embodiment can secure the plunger area (magnetic force generation area) while securing the damper area for noise reduction, so there is a special technical effect that can increase the solenoid suction force. .

In addition, the plunger damper 1335 having a curved damper 1335R according to the embodiment has a curved shape rather than a simple upwardly extended shape, so that horizontal deformation of the damper is possible even if the damper height is increased, so that the plunger 1330 ), there is a special technical effect that can secure the moving distance. Accordingly, horizontal deformation is possible by the curved damper 1335R, and the deformation time is reflected in the contact time. There is a complex technical effect that can secure the plunger area, which is the generated area.

Next, FIG. 8 is a partially separated perspective view (same as FIG. 4b) of the solenoid valve 2000 according to the embodiment shown in FIG. 4A, and FIG. 9 is an elastic in the solenoid valve 2000 according to the embodiment shown in FIG. It is a perspective view in which the member 1360, the elastic adjustment unit 1355, and the plunger guide 1390 are omitted.

One of the technical problems of the embodiment is that in the solenoid valve for a fuel cell, as the position at which the elastic member is mounted is fixed, when the compressive load of the spring increases more than necessary, the fluid flow performance that can solve the problem of increasing power consumption to the solenoid valve An object of the present invention is to provide a solenoid valve for a fuel cell having a plunger guide having excellent durability and a fuel supply device including the same.

In order to solve this technical problem, referring to FIG. 9 , the plunger 1330 of the embodiment may have a plunger step 1330S on the lower side of the outer diameter, and the pilot cap 1350 includes a cap groove 1350H on the periphery. can do.

The elastic adjustment part 1355 may be selectively disposed in the plunger step 1330S or the cap groove 1350H.

10A is a perspective view in which the elastic adjustment part 1355 is disposed in the cap groove 1350H of the pilot cap 1350 in the solenoid valve according to the embodiment, and FIG. 10B is the elastic adjustment part 1355 in the solenoid valve according to the embodiment. is a perspective view disposed on the plunger step 1330S.

11A is a cross-sectional view C1 in which the elastic adjustment unit 1355 is disposed in the cap groove 1350H of the pilot cap 1350 in the solenoid valve according to the embodiment as shown in FIG. 10A, and FIG. 11B is the embodiment as shown in FIG. 10B. It is a cross-sectional view (C12) in which the elastic control unit 1355 is disposed on the plunger step 1330S in the solenoid valve according to FIG.

According to the embodiment, since the elastic adjustment unit 1355 is selectively disposed in the plunger step 1330S or the cap groove 1350H, it is possible to control the compressive load of the elastic member 1360, so that the power to the solenoid valve There is a special technical effect that can reduce consumption.

For example, in a solenoid valve for a fuel cell according to an internal technology, as the position at which the elastic member is mounted is fixed, there is a problem in that the increase or decrease of the compressive load of the spring cannot be responded to when necessary. However, when the compressive load of the spring becomes larger than necessary, there is a problem in that the power consumption is increased in the solenoid valve. For example, when the solenoid valve continuously consumes more than 2W of power in power consumption, a technical problem occurs, and it is necessary to minimize power consumption.

According to the solenoid valve for a fuel cell according to the embodiment, there is a technical effect that can solve the problem of not responding when necessary to increase or decrease the compressive load of the elastic member 1360.

For example, according to the embodiment, as shown in FIG. 9 , the plunger 1330 of the embodiment may have a plunger step 1330S below the outer diameter, and the pilot cap 1350 may include a cap groove 1350H on the periphery. can Through this, the elastic control unit 1355 selects an assembly position in the area from the plunger 1330 to the pilot cap 1350 as it is selectively disposed in the plunger step 1330S or the cap groove 1350H to elastically There is a special technical effect of adjusting the compressive load of the member 1360 .

For example, when the pressing force is increased to block the orifice hole, the compressive load of the elastic member 1360 increases as the elastic adjustment part 1355 is disposed in the cap groove 1350H as shown in FIGS. 10A and 11A . can do it

In addition, when the solenoid power is insufficient, as shown in FIGS. 10b and 11b, as the elastic adjustment part 1355 is disposed on the plunger step 1330S, the compressive load of the elastic member 1360 is reduced to respond favorably to the opening of the orifice hole. There are special technical effects that can be

Next, Figure 12 is an exploded perspective view of the cover member 1400, the core shaft 1320, and the plunger guide 1390 in the solenoid valve according to the embodiment.

13A is a partial perspective view in which the core shaft 1320, the plunger guide 1390, and the pilot cap 1350 are coupled to the cover member 1400 in the solenoid valve according to the embodiment, and FIG. 13B is the embodiment shown in FIG. 13A It is a bottom perspective view of a partial perspective view of a solenoid valve according to an example, and FIG. 13C is a right perspective view of a partial perspective view of the solenoid valve according to the embodiment shown in FIG. 13A .

Referring first to FIG. 12 , in the embodiment, the core shaft 1320 may include a core body 1321 and a core extension 1322 arranged to extend from the lower side of the core body 1321 to the side.

The core shaft 1320 may include a first core recess 1320R1 inside the lower end of the core extension part 1322 . In addition, the core shaft 1320 may include a second core recess 1320R2 outside the lower end of the core extension part 1322 .

The plunger guide 1390 of the embodiment may include a plunger protrusion 1390P and a fluid flow-through portion 1390F. The plunger protrusion 1390P may be coupled to the first core recess 1320R1 (see FIG. 13B ).

In addition, in the embodiment, the cover member 1400 may include a cover protrusion 1400P at an inner lower end of the hollow cover extension 1410 . The cover protrusion 1400P may be coupled to the second core recess 1320R2 (see FIG. 13B ).

13A to 13C , in the embodiment, the fluid flow-through portion 1390F of the plunger guide 1390 is positioned at a position corresponding to the inlet 1101 of the housing 1100, thereby preventing the flow of the flowing fluid. There is a special technical effect that can prevent plunger disengagement without doing so.

In addition, in the embodiment, the plunger protrusion 1390P of the plunger guide 1390 is coupled to the first core recess 1320R1 of the core extension 1322, so that the fluid flow through portion 1390F of the plunger guide 1390 is connected to the housing. There is a technical effect that can be controlled to coincide with the fluid inlet 1101 in the axial direction.

In addition, in the embodiment, the cover protrusion 1400P of the cover member 1400 is coupled to the second core recess 1320R2 disposed on the outside of the core extension part 1322, so that the fluid inlet 1101 and the core shaft 1320 of the housing ) position can be firmly and reliably maintained, and the plunger protrusion 1390P of the plunger guide 1390 is coupled to the first core recess 1320R1 of the core extension 1322, whereby the fluid flow of the plunger guide 1390 There is a technical effect of controlling the through portion 1390F to coincide with the fluid inlet 1101 of the housing in the axial direction.

Accordingly, according to the embodiment, the fluid flow-through portion 1390F of the plunger guide 1390 is positioned at a position corresponding to the inlet 1101 of the housing 1100 to prevent the plunger from being separated without interfering with the flow of the inflowing fluid. There are special technical effects that can be avoided.

Next, FIG. 14 is a perspective view of a vehicle 3000 in which the solenoid valve 2000 for a fuel cell according to the embodiment is mounted.

Referring to FIG. 14 , 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 mounted on 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, and 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 provided to the solenoid valve 2000 for a fuel cell through the first pipe, and the hydrogen flows through the solenoid valve 2000 and then through the second pipe through a predetermined supply valve. It may be provided to the fuel cell stack through the The hydrogen supply device may be applied to various applications based on fuel cells as well as the vehicle 3000 using a fuel cell as a power source as shown in FIG. 14 .

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, 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 only 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 the differences related to these 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, a fluid passage through which the fluid flows, and an outlet through which the fluid is discharged;
a pilot and a plunger disposed on the housing and configured to open and close the fluid passage;
a core shaft having the pilot and the plunger disposed therein;
a pilot cap coupled to the lower side of the pilot and the lower side of the plunger; and
Includes; a plunger guide coupled to the core shaft and surrounding the plunger and the pilot cap;
The core shaft includes a first core recess on the lower side,
The plunger guide includes a plunger projection on one side,
A solenoid valve for a fuel cell having a plunger guide having excellent fluid flow and durability, wherein the plunger protrusion of the plunger guide is coupled to the first core recess of the core extension. According to claim 1,
The core shaft includes a core body and a core extension arranged to extend laterally from a lower side of the core body,
The core shaft includes the first core recess inside the lower end of the core extension part, and a solenoid valve for a fuel cell having a plunger guide having excellent fluid flow and durability. According to claim 1,
The plunger guide includes a hollow guide body, the plunger protrusion disposed on one side of the guide body, and a fluid flow-through portion penetrating a side surface of the guide body,
A solenoid valve for a fuel cell having a plunger guide having excellent fluid flow and durability, wherein the fluid flow-through portion of the plunger guide is at least partially coincident with the fluid inlet of the housing in the axial direction. a housing including an inlet through which a fluid is introduced, a fluid passage through which the fluid flows, and an outlet through which the fluid is discharged;
a pilot and a plunger disposed on the housing and configured to open and close the fluid passage;
a core shaft having the pilot and the plunger disposed therein;
a pilot cap coupled to the lower side of the pilot and the lower side of the plunger;
a plunger guide coupled to the core shaft and surrounding the plunger and the pilot cap; and
a cover member disposed on the housing; and
The core shaft includes a second core recess on the outside of the lower end,
The cover member includes a cover protrusion on the inner lower end,
The cover protrusion is coupled to the second core recess of the core shaft, the fuel cell solenoid valve having a plunger guide excellent in fluid flow and durability. 5. The method of claim 1 or 4,
Further comprising an elastic member disposed between the pilot cap and the plunger guide,
The outer surface of the elastic member is disposed inside the plunger guide,
The plunger has a plunger step below its outer diameter,
the pilot cap includes a cap groove around it;
Further comprising an elastic adjustment unit for supporting the elastic member,
The elastic control unit is a solenoid valve for a fuel cell having a plunger guide with excellent fluid flow and durability, which is selectively disposed in the plunger step or the cap groove. 5. The method of claim 1 or 4,
the plunger comprises a plunger damper disposed therein;
The plunger damper is a solenoid valve for a fuel cell having a plunger guide excellent in fluid flow and durability, including a curved damper whose upper side is convex upward. A fuel supply device comprising a solenoid valve for a fuel cell having the plunger guide having excellent fluid flow and durability according to any one of claims 1 to 3.

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