JP6477316B2 - Valve device - Google Patents

Description

  The present invention relates to a valve device.

  2. Description of the Related Art Conventionally, a valve device that controls the flow of gas into and out of a high-pressure gas container that stores high-pressure gas is known. For example, Patent Document 1 below describes a valve device that is attached to a high-pressure gas container that stores fuel gas supplied to a fuel cell.

  The valve device described in Patent Document 1 includes a gas flow path communicating with the inside of a high-pressure gas container, and an electromagnetically driven on-off valve that switches between opening and closing of the gas flow path. When the on-off valve is operated, a driving current is supplied to an electromagnetic actuator serving as a driving source to move the on-off valve in the valve opening direction.

  By the way, in the valve device attached to the high pressure gas container, when the temperature of the gas stored in the high pressure gas container rises, the machine detects the temperature of the gas and releases the gas to the outside of the high pressure gas container. Actuated safety valves (gas release valves) may be installed. For example, even in a valve device including the above-described electromagnetically driven valve body, by installing such a safety valve, it becomes possible to release the gas to the outside at an appropriate timing according to the temperature rise of the gas. Conceivable.

JP 2005-264966 A

  However, if a safety valve as described above is installed in a valve device having an electromagnetically driven valve body, heat generated by the drive current supplied to the electromagnetic actuator is transferred to the safety valve, and the safety valve may malfunction. Occurs.

  In addition, high-pressure gas containers tend to be downsized in order to reduce installation space and reduce manufacturing costs. Similarly, valve devices attached to high-pressure gas containers are also required to be downsized. ing. However, if the valve device is downsized, the safety valve must be placed close to the electromagnetic actuator, and the possibility that the safety valve malfunctions in response to the heat generated by the electromagnetic actuator is further increased. There is a problem that it ends up.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a valve device that can prevent a gas release valve from malfunctioning in response to heat generated from an electromagnetic actuator even when downsized.

  According to one aspect of the present invention, a valve device attached to a high-pressure gas container is provided. The valve device includes a housing in which a gas flow path for flowing gas is formed, an on-off valve that switches between supply and cut-off of gas through the gas flow path, an electromagnetic actuator that drives the on-off valve, and an increase in gas temperature And a gas discharge valve that discharges gas to the outside of the high-pressure gas container. Further, the valve device is disposed between the gas release valve in the housing and the electromagnetic actuator, and has a heat shield having a thermal conductivity smaller than that of the housing.

  According to the above aspect, the heat shield disposed between the gas release valve in the housing and the electromagnetic actuator shields the heat generated during operation of the electromagnetic actuator, and the heat is transmitted to the gas release valve. Suppress. Therefore, it is possible to provide a valve device that can prevent the gas release valve from malfunctioning in response to the heat generated from the electromagnetic actuator even when it is downsized.

It is the schematic which shows the usage example of the valve apparatus by embodiment of this invention. 1 is a perspective view of a valve device according to a first embodiment of the present invention. 1 is a plan view of a valve device according to a first embodiment of the present invention. It is a perspective view of the gas release valve and electromagnetic actuator by a 1st embodiment of the present invention. It is sectional drawing of the valve apparatus by 1st Embodiment of this invention. FIG. 6 is an enlarged view of a 6A portion indicated by a one-dot chain line in FIG. 5, and shows a state in which an on-off valve closes a first flow path. FIG. 6 is an enlarged view of a 6A portion indicated by a one-dot chain line in FIG. 5, and shows a state in which the on-off valve opens the first flow path. It is a top view of the valve apparatus by 2nd Embodiment of this invention. It is a perspective view of the gas release valve and electromagnetic actuator by 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may be different from the actual ratios.

<First Embodiment>
In FIG. 1, the usage example of the valve apparatus 100 which concerns on embodiment is shown. In this use example, the valve device 100 is applied to the fuel cell system 1 mounted on the fuel cell vehicle.

  The valve device 100 is attached to a high-pressure gas container 20 that stores a fuel gas (for example, hydrogen gas) supplied to a fuel cell (fuel cell stack) 10. The valve device 100 is used as a shut-off valve that switches between supply of gas into and out of the high-pressure gas container 20 and shut-off of gas supply.

  The high-pressure gas container 20 is connected to a leasing pull (fuel supply port) 50 via the valve device 100 and the first pipe 60a.

  The high-pressure gas container 20 is connected to the fuel cell 10 via the valve device 100 and the second pipe 60b. A regulator 30 for adjusting the flow rate of the gas supplied to the fuel cell 10 and a pressure regulating valve 40 for adjusting the pressure of the gas are disposed in the middle of the second pipe 60b.

  The high-pressure gas container 20 includes a container main body 21 that stores gas therein, and a supply port 23 provided at an end of one end of the container main body 21.

  The high-pressure gas container 20 is mounted on a fuel cell vehicle together with the fuel cell 10, for example.

  The container main body 21 can be formed of a known material in which a reinforcing layer such as glass fiber or carbon fiber is formed on a synthetic resin liner, for example. The supply port 23 of the high-pressure gas container 20 is configured as a mounting base that can be attached to and detached from the valve device 100 (see FIG. 5). The high-pressure gas container 20 is configured to be able to store a high-pressure gas of 70 MPa at the maximum, for example.

  Each of the regulator 30, the pressure regulating valve 40, and the electromagnetic actuator 140 of the valve device 100 to be described later can be controlled by a control unit (controller) mounted on the fuel cell vehicle, for example. The control unit can be configured by a known microcomputer including, for example, a CPU, ROM, RAM, various interfaces, and the like.

  When supplying the gas into the high-pressure gas container 20, for example, the gas is caused to flow into the first pipe 60a from the external equipment via the recessive pull 50. The gas flows into the valve device 100 via the first pipe 60a. The gas further flows into the high-pressure gas container 20 via the valve device 100.

  When supplying gas to the fuel cell 10, the gas in the high-pressure gas container 20 is caused to flow into the second pipe 60 b through the valve device 100. The gas is supplied to the fuel cell 10 via the second pipe 60b. The regulator 30 and the pressure regulating valve 40 adjust the gas to a desired flow rate and pressure when the gas passes through the second pipe 60b.

  Hereinafter, the details of the valve device 100 will be described with reference to FIGS.

  FIG. 2 is a perspective view of the valve device 100. FIG. 3 is a plan view of the valve device 100, and FIG. 4 is a perspective view of the gas release valve 160 and the electromagnetic actuator 140 provided in the valve device 100. FIG. 5 is a cross-sectional view schematically showing the internal structure of the valve device 100. 6 and 7 are enlarged views of a 6A portion indicated by a one-dot chain line in FIG. 5, and are diagrams for explaining the operation of the valve device 100. FIG. The configuration of the valve device 100 is partially simplified for each drawing.

  Referring to FIG. 2, the valve device 100 includes a housing 110 in which a gas flow path 120 through which a gas flows is formed, and an on-off valve 130 that switches between supply and shutoff of gas supply through the gas flow path 120. A gas release valve 160 that discharges gas to the outside of the high-pressure gas container 20, and a gas in the housing 110. It has a heat shield part 170 (corresponding to a “first heat shield part”) that is disposed between the release valve 160 and the electromagnetic actuator 140 and has a thermal conductivity smaller than that of the housing 110.

  As shown in FIG. 2, the housing 110 has a housing main body 111 formed in a rectangular box shape, and an insertion portion 113 formed in a cylindrical shape protruding from one end side of the housing main body 111. ing. The X axis given in the figure indicates the width direction of the housing body 111, the Y axis indicates the depth direction of the housing body 111, and the Z axis indicates the height direction of the housing body 111. .

  As shown in FIG. 5, the inside of the housing main body 111 and the inside of the insertion portion 113 are in communication with each other via a gas flow path 120. The insertion portion 113 is inserted into the supply port 23 when the valve device 100 is attached to the high-pressure gas container 20.

  The insertion portion 113 has a function as a fixing portion that mechanically fixes the valve device 100 to the high-pressure gas container 20. The insertion portion 113 is formed with a male screw portion 113 a that can be screwed into a female screw portion 23 a formed on the inner surface of the supply port 23 of the high-pressure gas container 20. The high-pressure gas container 20 and the valve device 100 can be connected to each other through the screw parts 23a and 113a.

  The material of the housing 110 (housing main body 111, insertion portion 113) is not particularly limited, and for example, a metal material can be used from the viewpoint of workability, strength, and manufacturing cost. In the present embodiment, the housing 110 is made of aluminum.

  As shown in FIG. 5, the gas flow path 120 formed in the housing 110 includes a first inlet 114a that communicates with the supply port 23 of the high-pressure gas container 20, and a first flow path 121 that communicates with the first inlet 114a. And have. For the sake of convenience, the upstream side of a position where a later-described main valve 131 is disposed in the first flow path 121 is referred to as an “upstream portion 121a” and is downstream of the position where the main valve 131 is disposed in the first flow path 121. The side is referred to as “downstream part 121b” for convenience.

  The gas channel 120 further includes a second inlet 114b that communicates with the supply port 23 of the high-pressure gas container 20 at a position different from the first inlet 114a, and a gas introduction path 122 that communicates with the second inlet 114b. A communication path 123 communicating with the first connection port 123a to which the first pipe 60a (see FIG. 1) is connected and the second connection port 123b to which the second pipe 60b (see FIG. 1) is connected; And a pilot flow path 124 that communicates with the pilot chamber 117.

  The first flow path 121 is a flow path for circulating the gas filled into the high-pressure gas container 20 and the gas supplied to the fuel cell 10. The communication path 123 communicates with the downstream portion 121b of the first flow path 121 on the way. When the gas is filled into the high-pressure gas container 20, the gas is introduced into the high-pressure gas container 20 via the first pipe 60a, the first connection port 123a, the communication path 123, the first flow path 121, and the first inflow port 114a. Inflow. On the other hand, when supplying gas to the fuel cell 10, the gas is sent to the fuel cell 10 via the first inlet 114a, the first flow path 121, the communication path 123, the second connection port 123b, and the second pipe 60b. . The details of the gas flow path (gas flow) when the valve device 100 is operated will be described later.

  A manual valve 182 for adjusting (squeezing) the flow rate of the gas flowing through the first flow path 121 is disposed in the downstream portion 121 b of the first flow path 121. By manually operating the manual valve 182, the flow rate of the gas flowing through the first flow path 121 can be adjusted by an operation independent of the operation for opening and closing the on-off valve 130.

  The gas introduction path 122 communicates with the inside of the high-pressure gas container 20 through the second inflow port 114b. A gas release valve 160 is disposed in the gas introduction path 122.

  The gas release valve 160 is configured by a mechanically operated fusing valve (hereinafter referred to as a fusing valve 160) that opens by sensing the temperature of the gas flowing into the gas introduction path 122. Details of the gas release valve 160 will be described later.

  A manual valve 181 for releasing the gas in the high pressure gas container 20 to the outside is disposed in the gas introduction path 122. By manually operating the manual valve 181, it is possible to release gas to the outside without operating the gas release valve 160.

  In the first inlet 114a and the second inlet 114b, for example, a filter that prevents contamination and the like present in the high-pressure gas container 20 from flowing into the valve device 100 can be installed.

  The on-off valve 130 is configured by a pilot type electromagnetic valve. The on-off valve 130 includes a main valve 131 to which an urging force is applied in the valve closing direction for closing the first flow path 121, and a pilot valve 141 for moving the main valve 131 in the valve opening direction for opening the first flow path 121. ,have.

  The main valve 131 is disposed in a valve chamber 116 formed in the main body 111 of the housing 110. The valve chamber 116 communicates with the first flow path 121 (see FIG. 7).

  The urging force is applied to the main valve 131 from the back side (left side in FIG. 5) toward the front side (right side in FIG. 5) by the urging member 135. The main valve 131 is seated on the valve seat 192 installed in the first flow path 121 with the biasing force applied, and closes the first flow path 121. The urging member 135 can be formed of a known elastic member such as a spring, for example.

  The urging member 135 is supported by a support member 191 installed on the back side of the main valve 131. Inside the main valve 131, an internal space 132 that communicates with the pilot flow path 124 via the flow port 133 is formed. The urging member 135 is inserted into the internal space 132 of the main valve 131 while the other end is fixed to the main valve 131 while the other end is fixed to the support member 191. .

  For example, as shown in FIG. 6, the front end surface of the main valve 131 includes a flat portion 134 a having a shape corresponding to the passage portion of the valve seat 192 and a flat portion so that the sealing performance when seated on the valve seat 192 is improved. It can be formed in a shape having a tapered portion 134b extending from 134a.

  As shown in FIGS. 4 and 5, the electromagnetic actuator 140 applies a biasing force in the valve closing direction (downward in the figure) to the pilot valve 141, the solenoid coil (coil portion) 142, and the pilot valve 141. And a plug 144 constituting a fixed iron core, an actuator case 145 containing the electromagnetic actuator 140 therein, and a lid 146 arranged outside the housing 110.

  The pilot valve 141 includes a plunger 141a that constitutes a movable iron core, and a seal portion 141b that is disposed at the tip of the plunger 141a. The seal portion 141b can be formed of a known member such as a resin elastic member (for example, an O-ring).

  As shown in FIG. 6, the plunger 141 a is arranged so that the tip thereof faces a pilot chamber 117 formed on the front side thereof. The plunger 141a is disposed in the actuator case 145 so as to be able to advance and retreat along a direction (up and down direction in FIG. 5) that approaches and separates from the valve seat 193.

  The plunger 141 a seats the seal portion 141 b on the valve seat 193 by the urging force applied from the spring 143. In a state where the seal portion 141 b is seated on the valve seat 193, communication between the pilot flow path 124 and the relay path 125 formed on the front surface side of the valve seat 193 is blocked.

  When the pilot valve 141 is opened, a drive current is supplied to the solenoid coil 142 to energize it. This energization generates a magnetic force that attracts the plunger 141a toward the plug 144, the plunger 141a, that is, the pilot valve 141 moves in the valve opening direction (upward in FIG. 5), and the pilot valve 141 moves away from the valve seat 193. To do. As shown in FIG. 7, when the pilot valve 141 is separated from the valve seat 193, the passage portion 193 a formed in the valve seat 193 and the pilot chamber 117 communicate with each other. The valve chamber 116 in which the main valve 131 is arranged communicates with the downstream portion 121b of the first flow path 121 through the pilot flow path 124, the pilot chamber 117, the passage portion 193a, and the relay path 125.

  The operation of the on-off valve 130 (the main valve 131 and the pilot valve 141) will be described with reference to FIGS.

  FIG. 6 shows a state where the on-off valve 130 closes the first flow path 121.

  When filling the gas into the high-pressure gas container 20, if the gas is sent into the valve device 100 from the lower sector 50, the gas flows through the communication path 123 (see FIG. 5), and the downstream portion 121 b of the first flow path 121. Flows in. In the initial stage in which the gas is supplied to the high-pressure gas container 20, the state in which the main valve 131 is seated on the valve seat 192 is maintained by the force by which the biasing member 135 biases the main valve 131 toward the valve seat 192. The When filling the gas into the high-pressure gas container 20, the regulator 30 and the pressure regulating valve 40 (see FIG. 1) arranged in the second pipe 60b are closed.

  When the gas supply is continuously performed, the gas pressure in the downstream portion 121b of the first flow path 121 and the communication path 123 gradually increases. In response to the increase in gas pressure, the main valve 131 moves backward to the back side against the urging force of the urging member 135. When the main valve 131 is separated from the valve seat 192, a gap through which gas can flow is formed between the valve seat 192 and the main valve 131. When the first flow path 121 is opened, the gas flows into the downstream portion 121b side of the first flow path 121. Then, the gas is filled into the high pressure gas container 20 via the first inlet 114 a and the supply port 23 of the high pressure gas container 20.

  When the supply of gas is continued after the high-pressure gas container 20 starts to be filled, the internal pressure of the high-pressure gas container 20 gradually increases. When the pressure difference between the internal pressure of the high-pressure gas container 20 and the gas filling pressure (the gas pressure in the downstream portion 121b of the first flow path 121 and the communication path 123) disappears, the main valve 131 causes the biasing member 135 to move. It moves in the valve closing direction by the urging force applied by, and is seated again on the valve seat 192 as shown in FIG. Since the main valve 131 is seated on the valve seat 192 while being urged by the urging member 135, the gas flows back from the inside of the high-pressure gas container 20 to the first flow path 121 side after the gas filling is completed. To prevent.

  When supplying gas to the fuel cell 10, first, the regulator 30 and the pressure regulating valve 40 arranged in the second pipe 60b are opened. Next, a drive current is supplied to the solenoid coil 142 of the electromagnetic actuator 140 to open the pilot valve 141 as shown in FIG.

  When the pilot valve 141 is opened, the valve chamber 116 in which the main valve 131 is disposed and the pilot chamber 117 in which the pilot valve 141 is disposed communicate with each other via the pilot flow path 124. Furthermore, the internal space 132 of the main valve 131 communicates with the pilot flow path 124 through the circulation port 133. Since the internal space 132 of the main valve 131 communicates with the valve chamber 116 on the back side of the main valve 131, the back pressure of the main valve 131 is the pressure in the downstream portion 121 b of the first flow path 121 and the communication path 123. (Downstream pressure). As a result, the internal pressure of the high pressure gas container 20 is higher than the back pressure of the main valve 131. Then, due to the differential pressure between the back pressure of the main valve 131 and the internal pressure of the high-pressure gas container 20, the main valve 131 is moved in the valve opening direction against the urging force applied to the main valve 131 by the urging member 135. A moving force is generated, and the main valve 131 is separated from the valve seat 192. When the main valve 131 is separated from the valve seat 192, a gap through which gas can flow is formed between the valve seat 192 and the main valve 131, and supply of gas to the fuel cell 10 is started.

  When stopping the supply of gas to the fuel cell 10, an operation of closing the regulator 30, the pressure regulating valve 40, and the pilot valve 141 is performed. By this operation, the main valve 131 moves in the valve closing direction by the urging force applied by the urging member 135, sits on the valve seat 192, and closes the first flow path 121.

  Next, the plug valve 160 and the heat shield 170 will be described.

  As shown in FIGS. 2 and 4, the plug valve 160 constituting the gas release valve includes a valve body 161 made of a soluble member, a valve body that houses the valve body 161 and has an opening 165 formed on the bottom surface. A portion 162, a through hole 163 communicating with the inside and the outside of the valve main body portion 162, and a lid portion 166 disposed outside the housing 110.

  The valve body 161 can be made of, for example, a known soluble alloy that melts when reaching a predetermined temperature. The valve body 162 can be made of, for example, heat resistant glass. On the outer peripheral surface of the valve main body 162, for example, a screw groove that enables attachment to the housing 110 can be formed.

  The valve body 161 and the valve main body 162 are disposed in the housing main body 111 of the housing 110. Further, the opening 165 formed in the valve main body 162 is disposed so as to face the gas introduction path 122 formed inside the housing 110 (see FIG. 5). The inside of the valve main body 162 communicates with the gas introduction path 122 through the opening 165. For this reason, the bottom of the valve body 161 accommodated in the valve main body 162 is disposed facing the inside of the gas introduction path 122 and is always exposed to the gas present in the gas introduction path 122.

  As shown in FIG. 2, the through hole 163 formed in the valve main body 162 of the plug valve 160 communicates with the gas discharge path 122 a formed in the housing 110. The gas discharge path 122 a is connected to a gas discharge port 115 that communicates with the outside of the housing 110.

  When the temperature of the gas in the high-pressure gas container 20 rises, the heat of the gas is transmitted to the valve body 161 of the plug valve 160 via the gas introduction path 122. When the valve body 161 is warmed and reaches a predetermined temperature, the valve body 161 is melted. When the valve body 161 is melted, the opening 165 formed in the valve main body 162 is opened. The gas flows into the valve body 162 from the opening 165 via the gas introduction path 122. Then, the gas flows into the gas discharge path 122a via the through hole 163 formed in the valve main body 162. Thereafter, the gas is discharged to the outside of the housing 110 through the gas discharge port 115 communicating with the gas discharge path 122a.

  As shown in FIG. 3 and FIG. 4, the heat shield 170 is composed of a housing 171 that contains air, an air layer 172 composed of air present in the housing 171, and a liquid generated in the air layer 172. A discharge hole 173 for discharging the air to the outside of the air layer 172.

  The heat shield 170 prevents the malfunction of the melt valve 160 due to the heat transmitted to the melt valve 160 when the solenoid coil 142 generates heat due to the drive current supplied to the electromagnetic actuator 140. It is installed. In the present embodiment, the valve element 161 and the electromagnetic actuator 140 of the fusing valve 160 are disposed in the housing main body 111 provided in the housing 110. For this reason, the heat shield 170 is disposed between the plug valve 160 and the electromagnetic actuator 140 in the housing body 111 so as to block the heat transfer path between the plug valve 160 and the electromagnetic actuator 140. Yes.

  For example, by adding a cooling circuit or the like for cooling the electromagnetic actuator 140 to the valve device 100, it is possible to prevent malfunction of the plug valve 160 due to heat generated from the electromagnetic actuator 140. However, when such equipment is added, the valve device 100 is enlarged accordingly. Since the valve device 100 is provided with the heat shield part 170, it is possible to prevent malfunction of the plug valve 160 and to reduce the size of the device.

  The accommodating portion 171 is configured by a space portion partitioned in the housing 110. However, the accommodating part 171 can also be comprised by the housing | casing (case) etc. which have a space part inside, for example.

  The discharge hole 173 is formed so as to communicate the inside and the outside of the housing portion 171. The liquid to be discharged from the discharge hole 173 is, for example, water generated when the air layer 172 is heated. The position and number of the discharge holes 173 to be formed are not particularly limited. For example, as shown in the figure, the discharge holes 173 can be formed one by one at both end portions located in the direction surrounding the electromagnetic actuator 140. Further, for example, an inclined surface that is inclined toward each discharge hole 173 side is formed on the bottom surface side of the air layer 172 so that the liquid generated in the air layer 172 can be easily guided to the discharge hole 173. Is possible.

  As shown in FIG. 3, the housing main body 111 is formed with a discharge passage 127 communicating with the discharge hole 173 and the outside. The liquid generated in the air layer 172 can be discharged out of the housing 110 via the discharge path 127.

  As shown in FIG. 4, the heat shield 170 is disposed closer to the electromagnetic actuator 140 than the gas release valve 160.

  The heat shield 170 is arranged in the longitudinal direction of the electromagnetic actuator 140 so as to cover the end 145a in the longitudinal direction (Z-axis direction) of the electromagnetic actuator 140 disposed in the housing 110 and the solenoid coil 142 included in the electromagnetic actuator 140. It is arranged along.

  An end 145 a in the longitudinal direction of the electromagnetic actuator 140 is an end of the actuator case 145 that accommodates each component of the electromagnetic actuator 140, and is an end that is located on the side inserted into the housing 110. The end portion 145 a constitutes a joint portion that is connected (fixed) to the housing 110 when the electromagnetic actuator 140 is fixed in the housing 110.

  The heat shield 170 is disposed so as to cover the solenoid coil 142 concentrically. In this embodiment, since the solenoid coil 142 has a substantially cylindrical outer shape, the heat shield 170 is concentrically surrounded around the solenoid coil 142 with the central axis C1 of the solenoid coil 142 as a reference. It is arranged. When the solenoid coil 142 has an outer shape other than a cylinder, the shape of the heat shield 170 can be changed as appropriate according to the shape of the solenoid coil 142.

  The area where the heat shield 170 covers the electromagnetic actuator 140 is not particularly limited as long as the heat shield effect is obtained. For example, as shown in FIG. 3, the electromagnetic actuator 140 covers a portion facing the fusing valve 160 side. It can be set to a certain area. By forming the heat shield part 170 in this way, it is possible to suitably suppress heat transfer from the electromagnetic actuator 140 side to the heat shield part 170 side. Further, the thickness of the heat shield part 170 is not particularly limited as long as the heat shield effect can be obtained.

  As described above, in the present embodiment, the heat shield 170 having a thermal conductivity smaller than that of the housing 110 is disposed between the plug valve 160 and the electromagnetic actuator 140. The heat shield unit 170 shields heat generated when the electromagnetic actuator 140 is operated, and suppresses the heat from being transmitted to the plug valve 160. Therefore, it is possible to provide the valve device 100 that can prevent the fusing valve 160 from malfunctioning in response to the heat generated from the electromagnetic actuator 140 even when it is downsized.

  In the present embodiment, the heat shield 170 is disposed closer to the electromagnetic actuator 140 than the plug valve 160. For this reason, it is possible to prevent heat from diffusing from the electromagnetic actuator 140 serving as a heat source to the periphery thereof, and it is possible to suitably suppress heat transfer between the electromagnetic actuator 140 and the fusing valve 160.

  Further, in the present embodiment, the heat shield 170 is configured so that the longitudinal end 145 a of the electromagnetic actuator 140 disposed in the housing 110 and the solenoid coil 142 included in the electromagnetic actuator 140 are covered. It arrange | positions along the longitudinal direction. For this reason, it is possible to effectively suppress heat from being transmitted from the solenoid coil 142 that is at a higher temperature than the other parts of the electromagnetic actuator 140 to the plug valve 160 in the housing 110 and the electromagnetic actuator 140. it can.

  In the present embodiment, the heat shield 170 is arranged so as to cover the solenoid coil 142 concentrically. For this reason, heat can be prevented from diffusing over a wide range around the solenoid coil 142, and the heat shield effect by the heat shield 170 can be further enhanced.

  Further, in the present embodiment, the heat shield 170 has an air layer 172. For this reason, the heat insulation effect by the heat insulation part 170 can be improved, and it becomes possible to suppress more effectively that heat is transmitted from the electromagnetic actuator 140 to the plug valve 160.

  In the present embodiment, the heat shield 170 has a discharge hole 173 for discharging the liquid generated in the air layer 172 to the outside of the air layer 172. Therefore, when the air layer 172 is heated by the heat generated by the electromagnetic actuator 140 and a liquid such as water is generated in the air layer 172, the liquid can be discharged to the outside of the air layer 172. . Thereby, it is possible to prevent the liquid from staying in the air layer 172 and reducing the heat shielding effect of the air layer 172. Furthermore, since it is possible to easily perform the operation of removing the water generated in the air layer 172, it is possible to reduce labor required for maintenance of the heat shield 170.

  Moreover, in this embodiment, the gas release valve is comprised with the plug valve 160 in which the valve body 161 consists of a soluble member. For this reason, the valve body 161 can be operated following the temperature rise of the gas in the high-pressure gas container 20, and the gas can be quickly discharged to the outside of the high-pressure gas container 20.

Second Embodiment
Next, the valve device 200 according to the second embodiment of the present invention will be described. About the structure etc. which are not especially demonstrated in description of this embodiment, it can be set as the thing similar to the valve apparatus 100 which concerns on 1st Embodiment mentioned above. Moreover, about the member provided with the same function, the same member number is attached | subjected and description is abbreviate | omitted.

  8 and 9 are diagrams showing a valve device 200 according to the second embodiment. FIG. 8 is a plan view of the valve device 200, and FIG. 9 is a perspective view of the fusing valve 160 and the electromagnetic actuator 140 provided in the valve device 200.

  In the valve device 100 according to the first embodiment described above, the heat shield 170 disposed between the plug valve 160 in the housing 110 and the electromagnetic actuator 140 is closer to the electromagnetic actuator 140 than the plug valve 160. It was arranged. On the other hand, in the valve device 200 according to the second embodiment, the heat shield 270 (corresponding to the “second heat shield”) is disposed closer to the plug valve 160 than the electromagnetic actuator 140.

  As shown in FIG. 8 and FIG. 9, the heat shield 270 includes an accommodating part 271 that accommodates air, an air layer 272 composed of air present in the accommodating part 271, and a liquid generated in the air layer 272. And a discharge hole 273 for discharging the air to the outside of the air layer 272.

  As shown in FIG. 8, the housing body 111 is formed with a discharge passage 227 communicating with the discharge hole 273 and the outside. The liquid generated in the air layer 272 can be discharged to the outside of the housing 110 through the discharge path 227. The discharge holes 273 are formed one by one on both end sides where the heat shield 270 is positioned in the direction surrounding the plug valve 160. For example, it is possible to form an inclined surface that is inclined toward the respective discharge holes 273 on the bottom surface side of the air layer 272 so that the liquid generated in the air layer 272 can be easily guided to the discharge holes 273. It is.

  As shown in FIG. 9, the heat shield 270 is disposed so as to cover the valve body 161 of the plug valve 160 disposed in the housing 110 along the longitudinal direction (Z-axis direction).

  The heat shield 270 is disposed so as to cover the plug valve 160 concentrically. In the present embodiment, since the valve main body 162 of the fusing valve 160 has a substantially cylindrical outer shape, the heat shield 270 is based on the central axis C2 of the valve main body 162, and the valve main body 162 It is arranged so as to surround the periphery concentrically. In addition, when the valve main body 162 has an outer shape other than a cylinder, the shape of the heat shield 270 can be changed as appropriate according to the shape of the valve main body 162.

  The area of the heat shield 270 that covers the plug valve 160 is not particularly limited as long as the heat shield effect can be obtained. For example, as shown in FIG. It is possible to set the area so as to cover the area. By forming the heat shield part 270 in this manner, it is possible to suitably suppress heat transfer from the electromagnetic actuator 140 side to the heat shield part 270 side.

  As described above, in the present embodiment, the heat shield 270 is disposed closer to the fusing valve 160 than to the electromagnetic actuator 140. The heat shield unit 170 shields heat generated when the electromagnetic actuator 140 is operated, and suppresses the heat from being transmitted to the plug valve 160. Further, the heat shield 270 can be accommodated in a relatively small area in the housing 110 in accordance with the shape of the plug valve 160. For this reason, the heat shield 270 can be provided without significantly changing the internal structure of the housing 110 or the layout of other components in the housing 110. Thereby, it can prevent that the width | variety of the design freedom in the housing 110 narrows by providing the heat shield part 270.

  In the present embodiment, the heat shield 270 is arranged so as to cover the plug valve 160 concentrically. For this reason, the heat transfer area of the plug valve 160 that transfers heat to and from the electromagnetic actuator 140 can be reduced, and the heat shield effect by the heat shield 270 can be enhanced.

  As mentioned above, although the valve apparatus which concerns on this invention was demonstrated through embodiment, this invention is not limited to embodiment described, It can change suitably based on description of a claim.

  For example, the gas release valve may be a mechanically operated valve that opens by sensing the temperature of the gas in the high-pressure gas container, and is not limited to a plug valve. For example, as the gas release valve, it is possible to use a temperature-sensitive valve including a valve body that reversibly opens and closes according to the gas temperature. In the description of the embodiment, the gas release valve is configured to release gas to the outside through a flow path (gas discharge path) and a port (gas discharge port) formed in the housing. However, the gas release valve may be configured not to pass through these flow paths and ports but to allow the gas to pass through the gas release valve and directly release the gas to the outside. Good.

  Further, for example, the valve device can be used by being attached to other than the high-pressure gas container for storing the fuel gas supplied to the in-vehicle fuel cell. For example, the valve device can be used by being mounted on a high-pressure gas container that stores natural gas.

  For example, it is also possible to provide the 1st heat shield part arrange | positioned close to a fusing valve and the 2nd heat shield part arrange | positioned close to an electromagnetic actuator in one valve apparatus.

  In addition, for example, the heat shield part may have a thermal conductivity smaller than that of the housing, that is, the heat shield part may satisfy the relationship of the heat conductivity of the heat shield part> the heat conductivity of the housing, It is not limited to what has an air layer. In addition, for example, when the heat conductivity of the housing is changed by changing the material of the housing, in accordance with this, the thermal conductivity of the heat shield portion is adjusted so that the relationship of the heat conductivity satisfies the above requirements. The configuration can also be changed as appropriate. For example, it is possible to configure the heat shield part using a heat insulating material including fibers such as glass wool or a heat insulating material including foamed plastic such as urethane foam.

  In the description of the embodiment, as the on-off valve, while the drive current is supplied to the electromagnetic actuator, the gas flow path is opened to supply the gas, and the supply of the drive current to the electromagnetic actuator is stopped. During this time, the gas passage was closed to stop the gas supply. However, the on-off valve closes the gas flow path while the drive current is being supplied to the electromagnetic actuator and stops the gas supply, and stops the gas supply while the drive current supply to the electromagnetic actuator is stopped. May be configured to operate so as to supply gas.

  Further, for example, the on-off valve is not particularly limited as long as it is driven by an electromagnetic actuator, and may be a direct acting electromagnetic valve or a kick pilot type electromagnetic valve.

  Further, the configuration of each part of the valve device, the layout of each flow path, and the like are not limited to those described with reference to the drawings. Omission of use of additional members shown in the embodiment, use of other additional members not shown in the embodiment, and the like can be appropriately performed.

10 Fuel cell,
20 high pressure gas container,
23 supply port,
100 valve device,
110 housing,
120 gas flow path,
130 On-off valve,
140 electromagnetic actuator,
145a longitudinal end,
160 Fusing valve (gas release valve),
161 valve body (soluble member),
170 heat shield (first heat shield),
172 air layer,
173 discharge holes,
200 valve device,
270 heat shield (second heat shield),
271 air layer,
273 discharge hole.

Claims (9)

A valve device attached to a high-pressure gas container,
A housing in which a gas flow path for circulating the gas is formed;
An on-off valve that switches between supply and shut-off of the gas through the gas flow path;
An electromagnetic actuator for driving the on-off valve;
A gas release valve that includes a valve body that operates as the temperature of the gas rises, and that releases the gas to the outside of the high-pressure gas container;
A valve device comprising: a heat shield portion disposed between the gas release valve in the housing and the electromagnetic actuator and having a thermal conductivity smaller than that of the housing.   2. The valve device according to claim 1, wherein the heat shield portion includes a first heat shield portion disposed closer to the electromagnetic actuator than the gas release valve.   The said 1st heat-shielding part is arrange | positioned along the said longitudinal direction so that the edge part of the longitudinal direction of the said electromagnetic actuator arrange | positioned in the said housing and the solenoid coil with which the said electromagnetic actuator is provided may be covered. The valve device described in 1.   The valve device according to claim 3, wherein the first heat shield portion is disposed so as to cover the solenoid coil concentrically.   5. The valve device according to claim 1, wherein the heat shield part includes a second heat shield part disposed closer to the gas release valve than the electromagnetic actuator.   The valve device according to claim 5, wherein the second heat shield part is arranged so as to cover the gas release valve concentrically.   The valve device according to claim 1, wherein the heat shield has an air layer.   The valve device according to claim 7, wherein the heat shield has a discharge hole for discharging the liquid generated in the air layer to the outside of the air layer.   The valve device according to any one of claims 1 to 8, wherein the gas release valve is a fusing valve in which the valve body is made of a soluble member.