JP2019087516A - Valve device - Google Patents

Abstract

To provide a valve device that can prevent water and moisture from entering an open/close mechanism inside a solenoid valve.SOLUTION: A valve device 100 constituting a fuel cell system includes a supply flow path for supplying fuel gas G to a fuel cell (upstream portion 22a, communication groove V4f, introduction path V4g, valve chamber V4h, output path V4i, and downstream portion 22b). The valve device 100 further includes a solenoid valve V4 having an open/close mechanism V4z provided in the middle of the supply flow path for opening and closing the supply flow path and water repellent filters F1, F2, and F3 disposed at an upstream side of the open/close mechanism V4z in a supply direction of the fuel gas G and passing the fuel gas G.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a valve device constituting a fuel cell system.

  Conventionally, an invention relating to a solenoid valve for controlling the supply of high pressure gas is known (see Patent Document 1 below). The electromagnetic valve described in Patent Document 1 includes a cylinder, a gas flow path, a coil, a plunger, and a valve body. The cylinder has a valve chamber formed therein.

  The gas flow passage includes an introduction passage communicating the inside and the outside of the cylinder and introducing high pressure gas into the valve chamber, and a discharge passage introducing the high pressure gas introduced from the valve chamber. The coil is wound around the outer periphery of the cylinder. The plunger is provided inside the valve chamber and moves in the valve chamber by energization of the coil. The valve body opens and closes the gas flow path in conjunction with the plunger.

  The plunger comprises a first split body and a second split body. The first divided body has a displacement abutting portion which accommodates the valve body and abuts on a portion opposite to the valve opening direction of the valve body when the gas flow path is opened. The second divided body is fixed to the first divided body in a state in which the valve body is accommodated between the second divided body and the displacement abutting portion.

  According to this configuration, the gas flow path is opened by the valve body coming into contact with the displacement contact portion and moving integrally with the first divided body, that is, the plunger. Since the displacement abutment portion is a part of the first divided body, it is displaced integrally with the first divided body. Thereby, compared with the conventional solenoid valve, the solenoid valve which employ | adopts this structure has high operation | movement reliability.

JP, 2014-111966, A

  The conventional solenoid valve can also be used, for example, in applications such as filling a vehicle gas tank of a fuel cell vehicle with a high pressure gas such as hydrogen gas at a hydrogen station. In such an application, there is a possibility that moisture may intrude into the inside of the solenoid valve together with the high pressure gas. The water that has infiltrated into the interior of the solenoid valve may, for example, stay in the form of a film around the plunger and freeze due to the decrease in the outside air temperature to cause the plunger to stick.

  The present invention provides a valve device that can prevent water and gas from entering the opening and closing mechanism inside the solenoid valve.

  One aspect of the present invention is a valve device constituting a fuel cell system, which is a supply flow path for supplying a fuel gas to a fuel cell, and is provided in the middle of the supply flow path to open and close the supply flow path. A valve device comprising: a solenoid valve having an opening / closing mechanism; and a water repellent filter disposed upstream of the opening / closing mechanism in the supply direction of the fuel gas to pass the fuel gas. .

  The valve device of the above aspect is, for example, a device that constitutes a part of a fuel cell system, and is mounted on a fuel cell vehicle. The valve device is, for example, a device for controlling the supply of fuel gas to be supplied to a vehicle gas tank mounted on a fuel cell vehicle from a storage unit such as a high pressure gas tank storing high pressure hydrogen gas, ie fuel gas at a hydrogen station or the like. It is. The valve device is, for example, a device that controls the supply of the fuel gas from the onboard gas tank filled with the fuel gas to the fuel cell mounted on the fuel cell vehicle.

  The valve device of the above aspect is, for example, connected to a storage unit at a hydrogen station or the like, and a fuel gas such as hydrogen gas is introduced into a supply flow path provided inside the valve device. At this time, it is desirable that the valve device be supplied with a fuel gas containing no water, but in some cases a fuel gas containing water may be supplied. For example, when the water contained in the fuel gas intrudes into the inside of the solenoid valve that opens and closes the supply flow path of the valve device, there is a possibility that problems such as freezing due to a drop in the environmental temperature may occur.

  Here, as described above, the valve device of the above aspect is provided with a water repellent filter that is disposed upstream of the opening / closing mechanism in the fuel gas supply direction and allows the fuel gas to pass therethrough. The water repellent filter has a function of passing gas and blocking the passage of moisture. Therefore, the fuel gas containing water introduced into the supply flow passage of the valve device passes through the water repellent filter on the upstream side in the fuel gas supply direction, and the water is removed and the valve device opening / closing mechanism To reach.

  Therefore, according to the valve device of the above aspect, it is possible to prevent water and the gas from entering the opening and closing mechanism inside the solenoid valve, and to prevent the water from staying in the form of a film on the opening and closing mechanism. Fixation of the opening and closing mechanism due to freezing can be prevented.

The valve device of the above aspect preferably has a space having a volume of 0.2 cm ³ or more around the water-repellent filter. For example, by having a space having a volume of 0.2 cm ³ or more on the upstream side in the fuel gas supply direction around the water repellent filter, the water repellent filter adheres to the surface of the filter It can be prevented from being clogged by the moisture.

  In the valve device of the above aspect, the water repellent filter may be provided at an inlet of a flow passage in communication with the opening and closing mechanism of the solenoid valve. Thus, the water contained in the gas can be removed at the inlet of the flow passage communicating with the opening and closing mechanism of the solenoid valve, and the intrusion of the water and the gas into the opening and closing mechanism inside the solenoid valve can be prevented.

  In the valve device of the above aspect, the water repellent filter may be provided at an outlet of a flow passage communicating with the opening and closing mechanism of the solenoid valve. Thus, the water contained in the gas can be removed at the outlet of the flow passage communicating with the opening and closing mechanism of the solenoid valve, and the intrusion of the water and the gas into the opening and closing mechanism inside the solenoid valve can be prevented.

  In the valve device of the above aspect, the water repellent filter may be provided at an inlet and an outlet of a flow passage communicating with the opening and closing mechanism of the solenoid valve. Thus, the water contained in the gas can be removed at the inlet and the outlet of the flow passage communicating with the opening and closing mechanism of the solenoid valve, and the moisture and the gas can be prevented from entering the opening and closing mechanism inside the solenoid valve.

  According to the valve apparatus of the above aspect, it is possible to prevent moisture from entering the opening / closing mechanism inside the solenoid valve together with the gas, and to prevent the opening / closing mechanism of the solenoid valve from sticking due to freezing of the entering moisture. Can.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic sectional drawing of the valve apparatus which concerns on one Embodiment of this invention. The expanded sectional view of the solenoid valve of the valve apparatus shown in FIG. The typical enlarged view which shows the state of the outer peripheral surface of the water-repellent filter shown in FIG. The schematic enlarged view corresponding to FIG. 3 which shows the state of the outer peripheral surface of a hydrophilic filter.

  Hereinafter, an embodiment of a valve device according to the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view of a valve device 100 according to an embodiment of the present invention. The valve device 100 of the present embodiment is a device constituting a part of a fuel cell system, and is mounted on, for example, a fuel cell vehicle, and a gas tank in which a high pressure fuel gas G such as hydrogen gas is stored at a hydrogen station or the like. Etc. are connected to the storage. The valve device 100 according to the present embodiment controls the supply of the fuel gas G from such a storage unit to the demand unit that receives the supply of the fuel gas G, such as a gas tank or a fuel cell mounted on an automatic fuel cell, for example. .

  The valve device 100 of the present embodiment includes, for example, a main body 10, a gas flow passage 20 provided in the main body 10, and a plurality of valves V1, V2, V3, and V4 for opening and closing the gas flow passage 20. ing. Although the details will be described later, the valve device 100 according to the present embodiment is a part of a fuel cell system, and is provided in the middle of the supply flow path 22 for supplying the fuel gas G to the fuel cell The water repellent filters F1 and F2 disposed on the upstream side of the fuel gas G in the supply direction and passing the fuel gas G with respect to the solenoid valve V4 having the opening and closing mechanism V4z , F3 (see FIG. 2). Hereinafter, the configuration of each part of the valve device 100 of the present embodiment will be described in detail.

  In the following, the direction in which the fuel gas G flows into the valve device 100 from the storage unit (not shown) is taken as the horizontal direction, the direction orthogonal to the lateral direction is taken as the vertical direction, and the direction orthogonal to these longitudinal and lateral directions is high. Each part of the valve device 100 will be described as the vertical direction. Note that these directions are simply directions for describing each part of the valve device 100 of the present embodiment, and do not necessarily coincide with the horizontal direction or the vertical direction. Each figure shows an orthogonal coordinate system in which the horizontal direction, the vertical direction, and the height direction of the valve device 100 of the present embodiment are respectively the X direction, the Y direction, and the Z direction.

  The main body 10 of the valve device 100 is made of, for example, a metal material such as a forged aluminum alloy. The main body 10 has a first recess 10a on one side in the lateral direction (X direction), and a second recess 10b and a third recess 10c on one side in the longitudinal direction (Y direction). A fourth recess 10d is provided on the other side, and a fifth recess 10e is provided on the other side in the longitudinal direction. The main body 10 has a gas inlet 11 at the bottom of the first recess 10 a.

  In the main body 10, check valves V1 and V3 are provided in the first recess 10a and the third recess 10c, respectively, and on the second recess 10b and the fifth recess 10e of the main body 10, the on-off valve V2 and the solenoid valve V4 are provided. Is provided. The fourth recess 10d is closed by, for example, a closing member 13 screwed to the recess 10d. The fifth recess 10 e is closed by, for example, a cover 15 fastened to the main body 10 by a bolt 14.

  The first check valve V1 provided in the first recess 10a of the main body 10 has a connector portion V1a projecting to the outside of the first recess 10a at one end, and the other end is inserted into the first recess 10a It is connected to the gas inlet 11 opened at the bottom of the first recess 10a. The connector portion V1a of the first check valve V1 is connected to, for example, a gas supply pipe for supplying the high-pressure fuel gas G stored in the storage portion to the valve device 100. The first check valve V1 allows the fuel gas G flowing in from the opening at the end of the connector portion V1a to pass toward the gas inlet 11 of the main body 10 and blocks the flow of the fuel gas G in the reverse direction. It is configured.

  The gas flow path 20 provided inside the main body 10 includes, for example, a filling flow path 21 for filling the on-vehicle gas tank with the fuel gas G, and a supply flow path for supplying the fuel gas G to the fuel cell from the on-vehicle gas tank, for example. And 22. In addition, for example, the gas flow passage 20 is opened in a wall surface facing the height direction (Z direction) of the second recess 10 b and extends in the height direction, and the bottom of the fourth recess 10 d And an auxiliary channel 25 extending in the lateral direction (X direction) and opening in the side wall of the bottom of the fifth recess 10e.

  The filling channel 21 has one end connected to the gas inlet 11 and extends in the lateral direction, which is the inflow direction of the fuel gas G from the gas inlet 11, bends approximately at right angles from there and extends in the longitudinal direction. It is open at the bottom of the second recess 10b. The on-off valve V2 provided in the second recess 10b of the main body 10 has a valve body V2a provided so as to be movable in the vertical direction and opening and closing the opening of the other end of the filling channel 21.

  The filling flow channel 21 has a branch point 21 b of the supply flow channel 22 in the middle of the portion extending in the vertical direction. Here, the branch point 21b of the filling flow channel 21 is, for example, the intersection point of the center line L1 of the filling flow channel 21 extending in the vertical direction and the center line L2 of the supply flow channel 22 extending in the horizontal direction It is a nearby area. The area near the intersection point is, for example, an area including the intersection point and whose distance from the intersection point is equal to or less than the radius of the filling channel 21.

  As the most upstream portion in the supply direction of the fuel gas G supplied from the on-vehicle gas tank, the supply flow passage 22 is, for example, the entire filling / supply flow passage 23, the second recess 10b, the branch point 21b, and the filling / supplying. And a part of the filling channel 21 between the channel 23 and the other. Further, the supply flow passage 22 is open at an upstream portion 22a communicating with the most upstream portion, the bottom of the third recess 10c and the bottom of the fifth recess 10e, and extends in the longitudinal direction (Y direction) And contains.

  The upstream portion 22a of the supply flow channel 22 branches from the branch point 21b of the filling flow channel 21, extends in the lateral direction, and opens at the side wall of the bottom of the fifth recess 10e. In the side wall of the bottom of the fifth recess 10 e, the auxiliary flow channel 25 is open at a position facing the opening of the upstream portion 22 a of the supply flow channel 22. In the example shown in FIG. 1, the center line L2 of the upstream portion 22a of the supply flow channel 22 and the center line L5 of the backup flow channel 25 coincide with each other.

  As shown in FIG. 1, the electromagnetic valve V4 provided in the fifth recess 10e includes, for example, a sleeve V4a, a movable core V4b, a fixed core V4c, a solenoid V4d, and a case V4e covering the solenoid V4d. ing.

  FIG. 2 is an enlarged sectional view of the solenoid valve V4 of the valve device 100 shown in FIG. The sleeve V4a is formed in a tubular shape having a flow passage inside. The sleeve V4a has an annular communication groove V4f extending in the circumferential direction of the sleeve V4a and communicating with the upstream portion 22a of the supply flow passage 22 and the auxiliary flow passage 25 on the outer peripheral surface, and the communication groove extending in the axial direction of the sleeve V4a A linear introduction passage V4g communicating the valve V4f with the valve chamber V4h in the sleeve V4a is provided.

  The sleeve V4a includes a valve chamber V4h communicating with the introduction passage V4g, a discharge passage V4i communicating with the valve chamber V4h and the downstream portion 22b of the supply flow passage 22, and a valve provided between the valve chamber V4h and the discharge passage V4i V4j. In the valve device 100 of the present embodiment, the communication groove V4f, the introduction passage V4g, the valve chamber V4h, and the lead-out passage V4i provided in the sleeve V4a of the solenoid valve are supply passages for supplying the fuel gas G to the fuel cell. It constitutes a part of 22.

  The movable core V4b has an outer diameter substantially equal to the inner diameter of the sleeve V4a, is axially movably accommodated in the sleeve V4a, and has a valve body V4k at its front end for opening and closing the valve seat V4j. The movable core V4b is urged toward the valve seat V4j in the axial direction extending in the longitudinal direction by a coil spring V4l disposed between the movable core V4b and the fixed core V4c. In the valve device 100 of the present embodiment, the open / close mechanism V4z of the solenoid valve V4 is mainly configured by the movable iron core V4b and the valve seat V4j inside the sleeve V4a.

  As described above, the valve device 100 includes the water repellent filters F1, F2, and F3 disposed upstream of the opening / closing mechanism V4z of the solenoid valve V4 in the supply direction of the fuel gas G and passing the fuel gas G. There is. In the example shown in FIG. 2, in the valve device 100, a first water repellent filter F1 is provided on the upstream side of the solenoid valve V4 in the supply direction of the fuel gas G in the middle of the upstream portion 22a of the supply passage 22. It is done.

  Further, in the example shown in FIG. 2, in the valve device 100, an annular second water repellent filter F2 is provided at the inlet of the introduction passage V4g which is a flow passage communicating with the opening / closing mechanism V4z of the solenoid valve V4. There is. More specifically, the second water repellent filter F2 is provided at the downstream end of the upstream portion 22a of the supply flow passage 22 in the fuel gas G supply direction. The second water repellent filter F2 is, for example, fitted in the recess provided on the outer peripheral surface of the sleeve V4a of the solenoid valve V4, and the opening in the sidewall of the fifth recess 10e of the upstream portion 22a and the sleeve of the solenoid valve V4 It is arrange | positioned between the communicating groove V4f provided in V4a.

  Furthermore, in the example shown in FIG. 2, the valve device 100 is provided with an annular third water repellent filter F3 at the outlet of the introduction passage V4g which is a flow passage communicating with the opening / closing mechanism V4z of the solenoid valve V4. There is. More specifically, the third water repellent filter F3 is disposed inside the sleeve V4a between the movable core V4b and the valve seat V4j. Note that the valve device 100 does not necessarily have to include all of the first to third filters F1, F2, and F3, and one or more of the first to third filters F1, F2, and F3 may be used. It should be provided.

  The material of the water repellent filters F1, F2 and F3 is, for example, polyamide, polyester, acrylic polymer, polyolefin, polyvinyl chloride, polyvinylidene chloride, polyfluorocarbon, polyurethane, silicone resin, fluorine resin, oil, paraffin, etc. Water repellent materials can be used.

Moreover, it is preferable that the valve apparatus 100 has a space having a volume of 0.2 cm ³ or more around the water repellent filters F1, F2, and F3. In the example illustrated in FIG. 2, the valve device 100 has a cross-sectional area of 0.2 cm ³ or more on the upstream side in the supply direction of the fuel gas G around the water repellent filters F1, F2, and F3. It has space.

  When the coil of the solenoid V4d is demagnetized, the movable iron core V4b is biased toward the valve seat V4j by the biasing force of the coil spring V4l and the pressure of the fuel gas G when the coil of the solenoid V4d is demagnetized, and the valve body V4k is the valve seat V4j Sit in As a result, the open / close mechanism V4z of the solenoid valve V4 closes one end of the lead-out path V4i which is a part of the supply flow path 22. In this state, the fuel gas G supplied from the upstream portion 22a of the supply flow passage 22 reaches the communication groove V4f, the introduction passage V4g, and the valve chamber V4h which constitute a part of the supply flow passage 22, but the supply is performed. The downstream portion 22 b of the flow path 22 is not reached.

  When the coil of the solenoid V4d is excited, the solenoid valve V4 is attracted to the fixed core V4c and thereby moves the movable core V4b away from the valve seat V4j against the biasing force of the coil spring V4l, and the valve disc V4k Leaves the valve seat V4j. As a result, the open / close mechanism V4z of the solenoid valve V4 opens one end of the lead-out path V4i which is a part of the supply flow path 22. In this state, the fuel gas G supplied from the upstream portion 22a of the supply flow passage 22 is supplied through the communication groove V4f, the introduction passage V4g, the valve chamber V4h and the discharge passage V4i which constitute a part of the supply flow passage 22. The downstream portion 22 b of the passage 22 is reached.

  As shown in FIG. 1, the second check valve V3 provided in the third recess 10c of the main body 10 has a connector portion V3a protruding to the outside of the third recess 10c at one end, and the other end is It is connected to the downstream part 22b of the supply flow path 22 which is inserted into the third recess 10c and opens at the bottom of the third recess 10c. The connector portion V3a of the second check valve V3 is connected to, for example, a fuel gas supply pipe for supplying the fuel gas G to a fuel cell mounted on a fuel cell vehicle. The second check valve V3 passes the fuel gas G flowing in from the downstream portion 22b of the supply flow passage 22 toward the opening at the end of the connector portion V3a, and blocks the flow of the fuel gas G in the reverse direction. Is configured as.

  The filling / supplying channel 23 opens in the wall surface facing the height direction (Z direction) of the second recess 10 b and extends in the height direction, and opens in one side in the height direction of the main body 10 (not shown). ing. The opening of the filling / supplying channel 23 (not shown) is connected to a demand part such as a vehicle gas tank (not shown). When the fuel gas G supplied to the gas inlet 11 is charged into the on-vehicle gas tank through the opening (not shown) of the filling / supply flow passage 23, the opening (not shown) of the filling / supply flow passage 23 is the main body It becomes 10 gas outlets 12.

  The filling / supplying channel 23 communicates with the filling channel 21 via the second recess 10 b when the on-off valve V 2 provided in the second recess 10 b opens the opening of the filling channel 21. Further, when the on-off valve V2 closes the opening of the filling flow channel 21, the filling / supply flow channel 23 is blocked from the filling flow channel 21 and the supply flow channel 22 by the valve body V2a of the on-off valve V2.

  Hereinafter, the operation of the valve device 100 according to the present embodiment will be described.

  For example, in the case of filling a high-pressure fuel gas G stored in a storage unit such as a gas tank at a hydrogen station into an on-vehicle gas tank mounted on a fuel cell vehicle, the supply pipe connected to the storage unit Is connected to the connector portion V1a of the first check valve V1. Then, the opening of the end of the filling flow channel 21 is opened by the on-off valve V2 of the valve device 100 to connect the filling flow channel 21 and the filling / supply flow channel 23 and close the opening / closing mechanism V4z of the solenoid valve V4 to supply the flow channel The supply flow path 22 is shut off between the upstream portion 22a and the downstream portion 22b of 22. In this state, high-pressure fuel gas G is supplied from the storage unit to the gas inlet 11 of the valve device 100 via the first check valve V1.

  The fuel gas G supplied from the storage unit to the valve device 100 via the first check valve V1 passes through the first check valve V1 and flows from the gas inlet 11 of the main body 10 to the gas flow inside the main body 10 It flows into the road 20. The fuel gas G flowing into the gas flow passage 20 flows through the laterally extending portion of the filling flow passage 21, passes through the bent portion bent in the longitudinal direction, passes through the longitudinally extending portion, and branches At the point 21 b, it is distributed to the filling channel 21 and the upstream portion 22 a of the supply channel 22.

  Here, the supply flow path 22 is closed between the upstream portion 22 a and the downstream portion 22 b by the opening and closing mechanism V 4 z of the solenoid valve V 4 of the valve device 100. Therefore, the fuel gas G passing through the branch point 21b and distributed to the upstream portion 22a of the supply flow passage 22 does not reach the downstream portion 22b of the supply flow passage 22 downstream of the opening / closing mechanism V4z of the solenoid valve V4.

  Further, since the opening of the filling channel 21 at the bottom of the first recess 10a is opened by the on-off valve V2 of the valve device 100, the fuel gas G that has passed the branch point 21b opens the opening of the filling channel 21. It passes and flows into the second recess 10 b of the main body 10. The fuel gas G which has flowed into the second recess 10b of the main body 10 is connected to the filling / supply flow path 23 opened to the wall surface of the second recess 10b and the gas outlet 12 opened to one side of the main body 10 The vehicle gas tank (not shown) is filled via the

  For example, at the hydrogen station, when filling of the on-board gas tank mounted on the fuel cell vehicle is completed, the on-off valve V2 shown in FIG. 1 is closed and the connector portion V1a of the check valve V1 connected to the gas inlet 11 Remove the fuel gas supply pipe from. Then, the open / close mechanism 4Vz of the solenoid valve V4 is opened to connect the upstream portion 22a and the downstream portion 22b of the supply flow path 22, and the open / close valve V2 is opened to connect the filling / supply flow path 23 and the filling flow path 21. .

  As a result, the fuel gas G supplied from the on-vehicle gas tank to the filling / supplying channel 23 is partially contained in the filling channel 21 constituting the supply channel 22, the upstream portion 22a, the communication groove V4f, the introduction channel V4g, and the valve chamber V4h. The fuel cell can be supplied to the fuel cell mounted on the fuel cell vehicle through the lead-out passage V4i and the downstream portion 22b.

  The hydrogen gas as the fuel gas G supplied at the currently popular hydrogen station is high in purity, and the water content is also small. However, if the hydrogen station further spreads in the future, hydrogen gas with low purity and high water content may be supplied. The hydrogen gas as the fuel gas G of the fuel cell system is determined, for example, such that the water content in 1 [mol] hydrogen gas is 5 [μmol] or less.

Therefore, when the valve device 100 does not have the water repellent filters F1, F2 and F3, when supplying 5 kg of fuel gas G to the fuel cell through the solenoid valve V4, a maximum of 0.2 inside the solenoid valve V4 is provided. Water [cm ³ ] may infiltrate. The water which has entered the inside of the solenoid valve V4 stays in the form of a film around the movable core V4b constituting the open / close mechanism V4z and freezes in a low temperature environment, and the movable iron core V4b adheres to the sleeve 4a It may interfere with the opening / closing operation of V4z.

  On the other hand, as described above, the valve device 100 of the present embodiment is a water repellent filter that is disposed upstream of the opening / closing mechanism V4z of the solenoid valve V4 in the supply direction of the fuel gas G to pass the fuel gas G. It has F1, F2 and F3. Therefore, it is possible to prevent water from invading the opening / closing mechanism V4z inside the solenoid valve V4 by the water repellent filters F1, F2, F3. Therefore, water is prevented from staying in the form of a film around the movable iron core V4b constituting the opening and closing mechanism V4z, and the fixation of the opening and closing mechanism V4z in a low temperature environment can be prevented.

  Note that, as described above, the valve device 100 does not necessarily have to include all of the first to third filters F1, F2, and F3, and among the first to third filters F1, F2, and F3, It only needs to have one. Thereby, it is possible to prevent water from invading the opening / closing mechanism V4z inside the solenoid valve V4. However, by providing any two of the first to third filters F1, F2 and F3, the effect of preventing the entry of water into the opening and closing mechanism V4z is improved. Further, by providing all of the first to third filters F1, F2 and F3, the effect of preventing the entry of water into the opening and closing mechanism V4z is further improved.

  FIG. 4 is a schematic enlarged view showing the state of the outer peripheral surface of the filter FX when the hydrophilic filter FX is used instead of the water repellent filter F2 shown in FIG. The water W adhering to the outer peripheral surface of the hydrophilic filter FX may wet and spread on the outer peripheral surface of the hydrophilic filter FX, and the water W may be retained in a film shape so as to cover the outer peripheral surface of the hydrophilic filter FX . The film-like water W covering the outer peripheral surface of the hydrophilic filter FX may freeze in a low temperature environment and interfere with the supply of the fuel gas G through the hydrophilic filter FX.

  FIG. 3 is a schematic enlarged view showing the state of the outer peripheral surface of the second water repellent filter F2 shown in FIG. Unlike the hydrophilic filter FX shown in FIG. 4, the water W adhering to the outer peripheral surface of the water repellent filter F2 is repelled by the outer peripheral surface of the water repellent filter F2 to become droplets, and the water repellent filter F2 The outer peripheral surface can be prevented from being covered by the film-like water W.

  Therefore, even when the water W adhering to the water repellent filter F2 is frozen in a low temperature environment, the fuel gas G can be supplied through the portion of the water repellent filter F2 to which the water W does not adhere. The same effect can be obtained with the first and third water repellent filters F1 and F3.

As described above, water of, for example, 0.2 cm ^{3 at} maximum may enter the inside of the solenoid valve V4. Therefore, when there is a space having a volume of 0.2 cm ³ or more on the upstream side in the supply direction of the fuel gas G around the water repellent filters F1, F2 and F3, the water repellent filter It is possible to more reliably prevent F1, F2 and F3 from being blocked by the moisture attached to the surfaces of the filters F1, F2 and F3.

  As described above, according to the present embodiment, it is possible to provide the valve device 100 capable of preventing water and the fuel gas G from entering the opening / closing mechanism V4z inside the solenoid valve V4.

  As mentioned above, although the embodiment of the present invention has been described in detail using the drawings, the specific configuration is not limited to this embodiment, and there are design changes and the like within the scope of the present invention. Also, they are included in the present invention.

22 Supply channel 22a upstream part (supply channel)
22b downstream part (supply channel)
100 Valve device F1 Water repellent filter F2 Water repellent filter F3 Water repellent filter G Fuel gas V4 Solenoid valve V4 z Opening and closing mechanism

Claims (1)

A valve device constituting a fuel cell system, comprising:
A supply flow path for supplying fuel gas to the fuel cell, a solenoid valve having an opening / closing mechanism provided in the middle of the supply flow path to open / close the supply flow path, and supply of the fuel gas from the opening / closing mechanism A water repellent filter disposed on the upstream side in the direction to pass the fuel gas.

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