JP2014062579A - Control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control valve which efficiently transmits heat of a hot medium fluid to a control valve's valve body, a valve seat part, and a driving part such as a plunger and a suction element, effectively prevents moisture from adhering to these members, freezing, and inhibiting a valve function, suppresses valve characteristic change caused by temperature change to a low level, and makes water less likely to adhere thereto and remain therein.SOLUTION: A control valve 10 includes: a valve chamber including a valve seat 30 having a valve port 28 through which a fluid passes; and a driving part 36 which moves a valve body 44 in a direction that moves away from the valve seat 30. In the control valve 10, the driving part 36 moves the valve body 44 in the direction that moves away from the valve seat 30 to cause the valve body 44 to open and close the valve port of the valve seat 30. A hot medium flow passage 76 is formed at the outer peripheral side of the valve seat 30 and the driving part 36.

Description

  The present invention relates to a control valve that controls a fluid, for example, a control valve that is disposed in a wetting fluid channel of a fuel cell system and is suitable for controlling a wetting fluid.

  Conventionally, in a control valve that controls a wetting fluid containing a large amount of moisture such as water vapor, such as a discharge valve disposed in a wetting fluid passage in a fuel cell system of a fuel cell vehicle, the moisture in the wetting fluid is a plunger. May adhere to moving parts.

  In this case, if the system is left at a low temperature after the system is stopped, the water adhering to the plunger may freeze, and the plunger may become inoperable. As a result, the control valve may not function and the entire system may be affected.

  For this reason, in Patent Document 1 (Japanese Patent Application Laid-Open No. 2008-232352), the valve chamber in which the wetting fluid flows and the drive unit in which the plunger is accommodated are hermetically separated by a diaphragm, and moisture adheres to the plunger. An electromagnetic valve that prevents this is disclosed.

  FIG. 13 is a longitudinal sectional view showing an outline of the electromagnetic valve of Patent Document 1. As shown in FIG.

  That is, the control valve 100 of Patent Document 1 includes a valve body 102, and the valve body 102 includes an inlet port 104 through which a fluid flows, an outlet port 105 through which a fluid flows out, and the inlet port 104. A valve seat 108 formed with a valve port 106 through which the inflowing fluid passes and a valve chamber 110 are formed.

  A driving unit 112 is fixed to the upper portion of the valve body 102 by a fastening member 114. The drive unit 112 includes a plunger tube 116, and a plunger 118 is accommodated in the plunger tube 116 so as to be movable in the axial direction.

  A suction element 120 is attached to the upper end of the plunger tube 116. A plunger spring 122 is interposed between the plunger 118 and the suction element 120 in a compressed state, and is configured to urge the plunger 118 in a direction away from the suction element 120.

  Furthermore, a valve stem member 126 integral with the insert fitting 124 is fixed to the lower end of the plunger 118.

  On the other hand, on the outer periphery of the plunger tube 116, the electromagnetic coil 136 is fixed together with the outer box member 134 by tightening a nut 132 to a fastening screw 130 formed on the upper portion of the attractor 120.

  Further, a diaphragm valve body 142 which is a separation membrane member for airtightly separating the valve chamber 110 and the drive space 140 formed in the drive unit 112 is attached to the lower end of the valve rod member 126. . The diaphragm valve body 142 includes a separation membrane portion 144 and a valve body portion 146, and a fixing portion 148 formed on the outer peripheral portion of the separation membrane portion 144 is interposed between the valve body 102 and the drive portion 112. It is fixed by being clamped between the mounted substantially ring-shaped fixing fitting 150 and the valve body 102.

  Further, a taper-shaped fram receiving taper surface 152 is formed on the lower surface of the fixing metal 150, so that when the valve body portion 146 of the diaphragm valve body 142 moves away from the valve seat 108, The diaphragm valve body 142 is configured to be displaced until the separation membrane portion 144 abuts the diaphragm receiving tapered surface 152 and to follow the valve body portion 146.

  In the conventional control valve 100 configured as described above, when the electromagnetic coil 136 is energized, the plunger 118 moves toward the attractor 120 against the urging force of the plunger spring 122, and the plunger 118 The valve body member 146 of the diaphragm valve body 142 attached to the lower end of the valve body member 126 is separated from the valve seat 108 and formed in the valve seat 108. The valve port 106 is opened.

  On the other hand, by stopping energization of the electromagnetic coil 136, the plunger 118 moves in a direction away from the attractor 120 by the biasing force of the plunger spring 122, and the valve rod member 126 fixed to the plunger 118 is moved. The valve body portion 146 of the diaphragm valve body 142 attached to the lower end of the valve stem member 126 abuts against the valve seat 108 so that the valve port 106 formed in the valve seat 108 is closed. It has become.

  Also during such an opening / closing operation, the diaphragm valve body 142 hermetically separates the valve chamber 110 and the drive space 140 formed in the drive unit 112, and thereby wet fluid flowing through the valve chamber 110. Water such as water vapor can enter the drive space 140 and can be prevented from adhering to the plunger 118, which is the drive mechanism of the valve body, and freezing, thereby impeding the valve function. .

  Moreover, in patent document 2 (Unexamined-Japanese-Patent No. 2006-153177), as typically shown in FIG. 14, the diaphragm 202 isolate | separates the valve chamber 204 and the drive part 206 airtightly, A control valve 200 is disclosed in which a heating medium flow path 210 is provided to warm the valve body 212 so that the valve body 212 can be smoothly displaced even at low temperatures.

JP 2008-232352 A JP 2006-153177 A

  However, in the conventional control valve 100 as disclosed in Patent Document 1, since the drive space 140 formed in the drive unit 112 is sealed by the diaphragm valve body 142, the ambient temperature (for example, −40 When the internal pressure on the drive space 140 side formed in the drive unit 112 or the pressure on the valve chamber 110 side changes due to a change in the temperature (° C. to 200 ° C.) or the like, as shown in FIG. The pressure change ΔP is received by the effective pressure receiving diameter φF (effective area: Af) of the separation membrane portion 144 of the diaphragm valve body 142.

  At this time, a load of “Af × ΔP” is generated in the separation membrane portion 144 of the diaphragm valve body 142, and changes the operating characteristics of the valve. For this reason, the operating characteristics of the valve may change due to changes in the temperature of the atmosphere, and the valve may not operate normally.

  That is, the temperature of the drive space 140 may increase due to an increase in the outside air temperature or a long-time energization of the electromagnetic coil 136, which may increase the internal pressure of the drive space 140 formed in the drive unit 112. .

  Thus, in the state where the internal pressure of the drive space 140 is increased, the load in the valve closing direction having the size of “Af × ΔP” described above is acting on the separation membrane portion 144 of the diaphragm valve body 142. Even if the operating voltage (current) at normal temperature is applied to the electromagnetic coil 136, the control valve does not operate, and the operating voltage (current) applied to the electromagnetic coil 136 is as much as the load of “Af × ΔP” is overcome. I had to make it bigger.

  Conversely, when the temperature of the atmosphere decreases in a cold district or the like, the internal pressure of the drive space 140 formed in the drive unit 112 may decrease and become negative pressure. Further, the pressure on the valve chamber 110 side may increase due to an increase in the pressure of the internal fluid.

  In this case, by stopping energization of the electromagnetic coil 136, the valve body portion 146 of the diaphragm valve body 142 contacts the valve seat 108, and the valve port 106 formed in the valve seat 108 is closed. Nevertheless, the pressure change ΔP ′ due to the decrease in the internal pressure of the drive space 140 formed in the drive unit 112 causes the separation membrane portion 144 of the diaphragm valve body 142 to open in the valve opening direction of “Af × ΔP ′”. There is a possibility that a malfunction may occur in which the valve port 106 formed in the valve seat 108 is opened due to the load of.

  For this reason, it is conceivable to provide the suction element 120 with a communication path that allows the drive space 140 to communicate with the outside of the control valve 100. However, in this case, if the diaphragm valve body 142 is damaged, the system fluid (hereinafter, “system fluid” means a fluid controlled by the control valve) leaks to the outside. End up.

  In addition, moisture such as water vapor may enter the drive unit 112, and the water once entered the drive unit 112 is difficult to escape. For this reason, when left at a low temperature after the system is stopped, it adheres to the plunger. The freezing of the moisture can cause the plunger 118 to become inoperable, resulting in the control valve 100 failing and the entire system being affected.

  On the other hand, in the conventional control valve 200 as disclosed in Patent Document 2, as shown in FIG. 14, a heating medium flow path 210 provided in the valve body 208, a valve body 212, a valve seat portion 214, and a drive portion. 206 is spaced apart.

  Therefore, for example, when the system is stopped at a low temperature after the system is stopped, the water adhered to these members is thawed, or when it is desired to warm the valve body 212 and the valve seat 214 of the control valve 200 so as not to freeze. Can not warm up quickly.

  Further, since heat escapes toward the valve main body 208 side which is the housing side, the heat of the heating medium fluid cannot be efficiently transmitted to the valve body 212, the valve seat portion 214, and the driving portion 206. For this reason, the water adhering to these members cannot be quickly thawed and cannot be warmed so as not to freeze. As a result, the control valve 200 may not function and the entire system may be affected. is there.

  Further, when the valve body 212 is in contact with the valve seat 214 and the frozen water adhering to these members is frozen, the valve cannot be opened by the driving force of the driving unit 206. It may cause malfunction.

  In view of such a current situation, the present invention can efficiently transfer the heat of the heating medium fluid to driving parts such as a valve body, a valve seat part, a plunger, and a suction element of a control valve. Providing a control valve that can effectively prevent moisture from adhering and freezing and hindering the valve function, providing little change in valve characteristics due to temperature changes, and preventing water from adhering and remaining. Objective.

  In addition, the present invention can reduce the magnetic resistance and design the electromagnetic coil to be small. As a result, it is compact, requires less magnetomotive force to operate the control valve, and reduces power consumption. It is an object of the present invention to provide a control valve that can be used.

The present invention has been invented in order to achieve the problems and objects in the prior art as described above.
A valve chamber with a valve seat having a valve port through which fluid passes;
A drive unit that moves the valve body in the direction of separating and contacting the valve seat;
The valve is moved by the drive unit in a direction in which the valve body is moved away from or in contact with the valve seat, and the valve body is configured to open and close the valve port of the valve seat,
A heating medium flow path is formed on the outer peripheral side of the valve seat and the drive unit.

  With this configuration, since the heating medium flow path is formed on the outer peripheral side of the valve seat and the driving unit, the heat of the heating medium fluid can be efficiently transferred to the valve seat and the driving unit of the control valve.

  Accordingly, it is possible to effectively prevent the water from adhering to these members and freezing and hindering the valve function, and to provide a control valve with a small change in valve characteristics due to a temperature change.

  Further, the present invention is characterized in that the drive unit includes a valve body, a plunger, and a suction element, and a heating medium flow path is provided on the outer peripheral side of these members.

  By comprising in this way, the drive part was provided with the valve body, the plunger, and the attraction | suction child, and provided the heating-medium flow path in the outer peripheral side of these members, Therefore The heat of the heating-medium fluid is efficiently performed, and a control valve The heat can be transferred to a drive unit such as a valve body, a valve seat part, a plunger, and a suction element.

  Accordingly, it is possible to effectively prevent the water from adhering to these members and freezing and hindering the valve function, and to provide a control valve with a small change in valve characteristics due to a temperature change.

  Further, the present invention is characterized in that the drive unit includes a plunger tube, and a heating medium flow path is formed so as to contact the outer periphery of the plunger tube.

With this configuration, since the heating medium flow path is formed so as to contact the outer periphery of the plunger tube, the heat of the heating medium fluid is applied to the portion exposed to the heating medium flow path of the suction element and the valve seat. On the other hand, heat can be transferred directly.
Further, heat can be transferred to the portion of the valve seat covered with the plunger tube, the plunger, via the plunger tube.

  Therefore, it can be thawed efficiently and quickly even if freezing sticking or freezing clogging caused by freezing of water that adheres and remains in the system flow path by leaving it at a low temperature after the system is stopped. In addition, even during operation at a low temperature, it is possible to prevent freezing and freezing clogging during operation.

  Further, the present invention is characterized in that a heating medium channel forming member in which a channel is formed is attached to the heating medium channel.

  By comprising in this way, a flow path can be formed only by attaching a warm medium flow path formation member to a warm medium flow path. In addition, since the flow path is formed in the heating medium flow path forming member, the shape of the flow path can be easily designed.

  The present invention is characterized in that the heating medium flow path forming member is composed of a magnetic member.

  By configuring in this way, the heating medium flow path forming member is made of a magnetic member, so that the magnetic resistance between the electromagnetic coil and the drive unit can be reduced. Accordingly, the magnetomotive force required for the movement of the plunger, that is, the opening and closing of the valve body is reduced, and the coil can be designed to be small. As a result, the power consumption necessary for operating the control valve is small. Is possible.

  Moreover, the present invention is characterized in that the heating medium flow path forming member is composed of a porous member.

  By configuring in this way, the heat medium flow path forming member is made of, for example, steel wool made of SUS430, mesh, sintered metal, and the like, and the flow path is formed only by being attached to the heat medium flow path. And cost can be reduced.

  Further, the present invention is characterized in that a groove-shaped flow path is formed on at least one side of an inner peripheral side or an outer peripheral side of the warm medium flow path forming member in the warm medium flow path forming member.

  By configuring in this way, it is only necessary to form a groove-shaped flow path on at least one side of the inner side or outer peripheral side of the heating medium flow path forming member, so that the processing is easy and the cost is reduced. Can do.

  Further, according to the present invention, the warm medium flow path forming member is a first warm medium flow path forming member disposed on the outer peripheral side of the valve seat and the plunger, and a first warm medium flow path forming member disposed on the outer peripheral side of the suction element. It is characterized by comprising two heating medium flow path forming members.

  By comprising in this way, the 1st heating medium flow path formation member which consists of an electromagnetic coil and a magnetic member, the magnetic circuit which reaches a plunger, and the 2nd heating medium flow path formation member which consists of an electromagnetic coil and a magnetic member , The magnetic circuit leading to the attractor is respectively formed, the magnetomotive force necessary for the movement of the plunger, that is, the opening and closing of the valve body is reduced, and the coil can be designed to be small. As a result, the control valve It is possible to reduce the power consumption required for operating.

  Further, according to the present invention, there is provided a system fluid flow path from the valve chamber to the outer periphery of the plunger, the outer periphery of the suction element, and the flow path formed in the axial direction at the center of the suction element. It is a formed control valve.

  By configuring in this way, for example, when the fuel cell system is stopped, by performing a purge operation with an inert gas such as air or nitrogen gas or a system fluid, water staying in the control valve, A system in which water staying between the plunger and the plunger tube reaches from the valve chamber to the outer periphery of the plunger and the outer periphery of the suction element, and to the flow path formed in the axial direction at the center of the suction element. It can be extruded through the fluid flow path.

  Therefore, it is difficult for water to adhere and remain, it can be efficiently thawed with a heating fluid, and the valve function can be effectively prevented from being disturbed, the change in valve characteristics due to temperature change is small, and water adheres. Therefore, it is possible to provide a control valve that hardly remains.

  According to the present invention, since the heating medium flow path is formed on the outer peripheral side of the valve seat and the driving unit, the heat of the heating medium fluid can be efficiently transferred to the valve seat and the driving unit of the control valve.

  Accordingly, it is possible to effectively prevent the water from adhering to these members and freezing and hindering the valve function, and to provide a control valve with a small change in valve characteristics due to a temperature change.

  Further, according to the present invention, the drive unit includes the valve body, the plunger, and the suction element, and the heating medium flow path is provided on the outer peripheral side of these members. The heat can be transferred to a drive unit such as a valve body, a valve seat part, a plunger, and a suction element.

  Accordingly, it is possible to effectively prevent the water from adhering to these members and freezing and hindering the valve function, and to provide a control valve with a small change in valve characteristics due to a temperature change.

  Further, according to the present invention, for example, when the fuel cell system is stopped, by performing a purge operation with an inert gas such as air or nitrogen gas or a system fluid, water staying in the control valve, A system in which water staying between the plunger and the plunger tube reaches from the valve chamber to the outer periphery of the plunger and the outer periphery of the suction element, and to the flow path formed in the axial direction at the center of the suction element. It can be extruded through the fluid flow path.

  Therefore, it is difficult for water to adhere and remain, it can be efficiently thawed with a heating fluid, and the valve function can be effectively prevented from being disturbed, the change in valve characteristics due to temperature change is small, and water adheres. Therefore, it is possible to provide a control valve that hardly remains.

FIG. 1 is a longitudinal sectional view showing an outline of an electromagnetic valve which is a control valve of the present invention. FIG. 2 is a partially enlarged longitudinal sectional view of FIG. 3 is a cross-sectional view taken along line AA of the control valve of FIG. FIG. 4 is a perspective view of the plunger of the control valve of the present invention. FIG. 5 is a cross-sectional view similar to FIG. 3, showing another embodiment of the control valve of the present invention. FIG. 6 is a perspective view of a plunger of the control valve of FIG. FIG. 7 is a longitudinal sectional view schematically showing a solenoid valve that is a control valve according to another embodiment of the present invention. 8 is a cross-sectional view taken along line AA of the control valve of FIG. FIG. 9 is a sectional view similar to FIG. 8, showing another embodiment of the control valve of the present invention. FIG. 10 is a perspective view of the first heating medium flow path forming member 84 of the control valve of FIG. FIG. 11 is a cross-sectional view similar to FIG. 8 showing another embodiment of the control valve of the present invention. FIG. 12 is a cross-sectional view similar to FIG. 8 showing another embodiment of the control valve of the present invention. FIG. 13 is a longitudinal sectional view showing an outline of a conventional solenoid valve. FIG. 14 is a longitudinal sectional view schematically showing an outline of a conventional solenoid valve.

  Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing an outline of a solenoid valve which is a control valve of the present invention, FIG. 3 is a sectional view of the control valve of FIG. 1 taken along line AA, and FIG. FIG. 5 is a sectional view similar to FIG. 3 showing another embodiment of the control valve of the present invention, and FIG. 6 is a perspective view of the plunger of the control valve of FIG.

  In FIG. 1, the code | symbol 10 has shown the control valve of this invention whole.

  The control valve 10 of this embodiment is an electromagnetic valve, and is used, for example, as a control valve that is disposed in a wet fluid flow path of a fuel cell system and controls the wet fluid.

  As shown in FIGS. 1 and 2, the control valve 10 of this embodiment includes a valve main body 12, and the valve main body 12 includes a first valve main body 14 and a second valve main body 16. It is configured.

The first valve body 14 has a valve seat mounting opening 18 formed at the center thereof, and a valve seat member 20 is mounted in the valve seat mounting opening 18.
That is, a flange-shaped stepped portion 14a projecting on the inner peripheral side is formed above the valve seat mounting opening 18 of the first valve body 14, and a mounting hole 14b is formed in the stepped portion 14a. Has been. A large-diameter fastening recess 14c is formed above the step 14a.

On the other hand, the valve seat member 20 has a substantially cylindrical shape and includes a base end portion 20a having a small diameter, and a fastening screw 20b is formed on the outer periphery of the base end portion 20a. Further, a flange-shaped large-diameter portion 20c protrudes outward from the intermediate portion of the valve seat member 20.
Then, the small-diameter base end portion 20 a of the valve seat member 20 is inserted into the mounting hole 14 b of the step portion 14 a of the first valve body 14. The large-diameter portion 20c of the valve seat member 20 is fitted into the valve seat mounting opening 18 of the first valve body 14, and the large-diameter portion 20c is brought into contact with the flange-shaped step portion 14a. .

In this state, in the fastening recess 14c, the fastening nut 22 is fastened to the fastening screw 20b formed on the base end portion 20a of the valve seat member 20 that is projected from the fastening recess 14c. A seat member 20 is fixed to the first valve body 14.
In addition, between the 1st valve main body 14 and the valve seat member 20, by mounting | wearing the sealing groove part 20d formed in the large diameter part 20c of the valve seat member 20 with the sealing member 24, such as an O-ring, for example. Airtightly separated.

  Further, a first port 26 into which a fluid flows is formed inside the valve seat member 20, and the inner diameter of the valve seat member 20 on the front end side is formed small, whereby a valve port through which the fluid passes is formed. 28 is formed. A valve seat 30 is formed below the valve port 28 so as to project in an annular shape.

  In addition, a step portion 26a is formed in the middle of the first port 26, and a first filter 32 for preventing dust contained in the fluid from passing through the step portion 26a. For example, it is fixed by a fastener 34 such as a C-ring.

  A drive unit 36 is fixed below the first valve body 14 of the valve body 12. The drive unit 36 includes a plunger tube 38, and the upper end of the plunger tube 38 is fixed to the outer diameter portion of the valve seat member 20 by, for example, brazing or welding.

  A plunger 40 is accommodated in the plunger tube 38 so as to be movable in the axial direction. A suction element 42 is fixed to the lower end portion of the plunger tube 38 by, for example, brazing or welding. ing.

  A direction in which the plunger spring 31 is interposed between the plunger 40 and the suction element 42 in a compressed state on the outer periphery of the small-diameter base end portion 40 a of the plunger 40 and separates the plunger 40 from the suction element 42. It is comprised so that it may bias. Further, a valve body 44 is attached to the center of the distal end portion 40 b of the plunger 40.

  In addition, the second valve body 16 is formed with an opening 11 for attaching an attractor at the center thereof, and an attractor 42 is attached to the opening 11 for attaching an attractor. A large-diameter fastening recess 16 a is formed below the suction element mounting opening 11.

On the other hand, the suction element 42 has a substantially cylindrical shape and includes a base end portion 42a having a small diameter, and a fastening screw 42b is formed on the outer periphery of the base end portion 42a.
Then, the small diameter base end portion 42 a of the suction element 42 is inserted into the suction element mounting opening 11 of the second valve body 16.

  In this state, in the fastening recess 16a, the suction nut 46 is fastened to the fastening screw 42b formed on the proximal end portion 42a of the suction element 42, which is in a state of protruding from the fastening recess 16a. 42 is fixed to the second valve body 16.

In addition, as shown in FIGS. 1 to 4, in this embodiment, on the outer periphery of the distal end portion 40 b of the plunger 40, in this embodiment, four groove-shaped flow paths 48 arranged at a central angle of 90 ° are disposed. Is formed.
That is, as shown in FIG. 2 and FIG. 4, the groove-shaped channel 48 has a channel 48 formed by the gap between the outer periphery of the tip 40 b of the plunger 40 and the plunger tube 38. Thus, it is formed in a groove shape so as to extend in the axial direction.

  The number, arrangement position, shape, and the like of the flow paths 48 of the plunger 40 are not particularly limited as long as at least one flow path 48 is formed. For example, as shown in FIGS. 5 and 6, it is possible to form a flow path 48 in the shape of four notch grooves. Furthermore, the groove-shaped channel 48 and the notch-shaped channel 48 can be combined, and can be appropriately changed.

  A groove-shaped flow path 50 is formed on the outer periphery of the distal end portion 42c of the plunger 42 on the plunger 40 side. That is, the groove-shaped flow path 50 is formed so that the gap between the outer periphery of the tip end portion 42 c on the plunger 40 side and the plunger tube 38 extends in the axial direction so as to form the flow path 50. It is formed into a shape.

  As for the flow path 50 of the suction element 42, at least one flow path 50 is formed in the number, arrangement position, shape, and the like of the flow paths 50 of the suction element 42, similarly to the flow path 48 of the plunger 40. There is no particular limitation as long as it is. For example, as shown in FIGS. 5 and 6, it is possible to form a flow path 50 in the shape of four notch grooves. Furthermore, it is possible to combine the groove-shaped flow path 50 and the flow path 50 in the shape of a notch groove, and can be changed as appropriate.

  A radial flow path 52 extending in the center direction from the outer peripheral side of the suction element 42 is formed so as to communicate with the flow path 50 of the suction element 42. An axial flow path formed at the center of the suction element 42, that is, a second port 54 is formed in the intermediate portion 42 d of the suction element 42 so as to communicate with the radial flow path 52. Has been.

  In addition, a step portion 54a is formed in the middle of the second port 54, and a second filter 56 for preventing dust contained in the fluid from passing through the step portion 54a. For example, it is fixed by a fastener 58 such as a C-ring.

  The second valve body 16 and the suction element 42 are air-tightly separated by a seal member 60 such as an O-ring, for example, in a seal groove part 42e formed below the intermediate part 42d of the suction element 42. Yes.

  With this configuration, the system fluid flowing from the first port 26 of the valve seat member 20 flows between the valve seat member 20 and the plunger 40 as shown by the arrow B in FIGS. The formed valve chamber 62 is configured to pass through a groove-shaped channel 48 formed on the outer periphery of the distal end portion 40b of the plunger 40 and reach the outer periphery of the small-diameter base end portion 40a of the plunger 40. .

  Further, the system fluid passes through the axial flow path 50 and the radial flow path 52 of the suction element 42 formed on the outer periphery of the distal end portion 42 c of the suction element 42 on the plunger 40 side, and the center of the suction element 42. A system flow path 80 reaching the second port 54 in the axial direction formed in the section is formed.

  In this embodiment, the fluid flows in from the first port 26 and the fluid flows out of the second port 54, but conversely, the fluid flows in from the second port 54, It is also possible to configure the fluid to flow out from the port 26.

Further, as shown in FIGS. 1 and 2, a coil bobbin 64 around which a winding is wound is provided. That is, the coil bobbin 64 includes a substantially cylindrical coil bobbin main body 64a, and a flange portion 64b that protrudes outward from the coil bobbin main body 64a at a predetermined interval.
And the coil | winding is wound by the winding part 64c formed by these coil bobbin main bodies 64a and the flange part 64b, and the cross-section was substantially U-shaped, and the electromagnetic coil 66 was formed. Further, the electromagnetic coil 66 is integrated with the coil bobbin 64 by the mold resin 61.

Further, in the coil bobbin main body 64a of the coil bobbin 64, an outer casing member 68 is fixed to an upper extending portion 64d extending upward and a lower extending portion 64e extending downward.
The outer box member 68 includes an outer box member main body 68a including an upper plate portion and a side plate portion, and a bottom plate member 68b. Then, these members are fixed by, for example, caulking, press fitting, or the like, so that an outer box member 68 having a substantially square cross section is formed.

  And the coil bobbin 64 comprised in this way of the 1st valve main body 14 and the 2nd valve main body 16 with the outer casing member 68 between the 1st valve main body 14 and the 2nd valve main body 16 is demonstrated. It is fixed to the inner peripheral side so as to be clamped.

That is, the first valve body 14 and the valve seat member 20 are fixed by tightening the fastening nut 22 to the fastening screw 20b.
Further, the second valve body 16 and the suction element 42 are fixed by fastening a fastening nut 46 to the fastening screw 42b.

Further, the valve seat member 20 and the suction element 42 are fixed via a plunger tube 38.
Therefore, the coil bobbin 64 is sandwiched between the first valve body 14 and the second valve body 16 together with the outer box member 68 on the inner peripheral side of the first valve body 14 and the second valve body 16. As a result, the control valve 10 is assembled in a fixed state.

  The first valve body 14 and the coil bobbin 64 are hermetically separated by, for example, a seal member 70 such as an O-ring, and the second valve body 16 and the coil bobbin 64 are, for example, an O-ring. The seal member 72 is hermetically separated.

  In addition, as shown in FIGS. 1 to 3, one end of the side portion of the first valve main body 14 opens to the outside, and toward the central portion in the radial direction, that is, toward the valve seat member 20. A first heating medium port 74 formed so as to extend is formed.

A heating medium flow path 76 is formed so as to communicate with the radially inner end of the first heating medium port 74. That is, the heating medium flow path 76 is formed by a gap extending in the axial direction between the outer periphery of the plunger tube 38 and the coil bobbin main body 64 a of the coil bobbin 64.
The lower end of the heating medium flow path 76 extends to the vicinity of the lower end of the intermediate portion 42 d of the suction element 42 in the second valve body 16.

The second valve body 16 has a second heating medium port 78 extending in the radial direction from the outer peripheral side of the intermediate portion 42d of the suction element 42 to the side of the second valve body 16 and opening to the outside. Is formed. The second heating medium port 78 is formed so as to communicate with the heating medium flow path 76 extending in the axial direction.
Thereby, the heating medium flow path 76 is formed on the outer peripheral side of the valve seat 30 and the drive unit 36.

  Specifically, as shown by the arrow C in FIG. 1 and FIG. 2, the warm medium flow path 76 is a valve seat in which the warm medium flowing in from the first warm medium port 74 is formed with the valve seat 30. From the gap S1 on the outer circumference of the member 20 to the gap S2 on the outer circumference of the plunger tube 38 (that is, the gap S2 between the inner circumference of the coil bobbin 64 and the outer circumference of the plunger tube 38), the gap on the outer circumference of the suction element 42 The process reaches S 3 and is formed to communicate with the second heating medium port 78.

  Therefore, the heating medium flow path 76 is formed on the outer peripheral side of the valve seat 30, the valve body 44, the plunger 40, and the suction element 42. Thereby, the heat of the heating medium fluid can be efficiently transferred to the drive unit 36 such as the valve seat 30, the valve body 44, the plunger 40, and the suction element 42 of the control valve 10.

  Accordingly, it is possible to effectively prevent the water from adhering to these members and freezing and hindering the valve function, and to provide a control valve with a small change in valve characteristics due to a temperature change.

Further, in this case, since the heating medium flow path 76 is formed so as to be in contact with the outer periphery of the plunger tube 38, the heat of the heating medium fluid flowing through the heating medium flow path 76 is heated by the heating medium flowing through the heating medium flow path 76. The heat of the fluid can be directly transferred to the suction element 42.
On the other hand, with respect to the valve seat 30 of the valve seat member 20, heat is directly transferred to the portion exposed to the heating medium flow path 76, and to the portion covered with the plunger tube 38, the plan is obtained. Heat can be transferred indirectly through the jar tube 38.

Further, the heat of the warm fluid flowing through the warm fluid channel 76 can be indirectly transferred to the plunger 40 via the plunger tube 38.
As described above, the heat of the heating fluid flowing through the heating fluid channel 76 is applied to the valve seat 30 of the valve seat member 20 covered by the plunger tube 38 and to the plunger 40. Although the heat is indirectly transferred through the tube 38, the heat can be quickly transferred through the plunger tube 38.

  In addition, freezing due to water adhering to the first filter 32 disposed in the first port 26 of the valve seat member 20 and the second filter 56 disposed in the second port 54 of the suction element 42 is prevented. Thus, the heat of the warm medium flowing through the warm medium flow path 76 can be transferred via the valve seat member 20 and the suction element 42, and the filter can be prevented from being clogged due to freezing.

  Therefore, it can be thawed efficiently and quickly even if freezing sticking or freezing clogging caused by freezing of water that adheres and remains in the system flow path by leaving it at a low temperature after the system is stopped. In addition, even during operation at a low temperature, it is possible to prevent freezing and freezing clogging during operation.

  The direction in which the warm medium flows through the warm medium flow path 76 is not limited in any way, and it flows from the second warm medium port 78 and flows out from the first warm medium port 74. Is also possible.

Further, the first valve body 14 and the valve seat member 20 are airtightly separated by the seal member 24, and the second valve body 16 and the suction element 42 are airtightly separated by the seal member 60. ing.
Further, the first valve body 14 and the coil bobbin 64 are hermetically separated by a seal member 70. Further, the second valve main body 16 and the coil bobbin 64 are hermetically separated by a seal member 72.

Therefore, the heat medium flow path 76 is sealed with the outside and the system flow path 80, and heat can be efficiently transferred by the heat medium flow path 76.
As a result, the system fluid flowing through the system flow path 80 and external influences are not affected, and it is possible to effectively prevent moisture from adhering to freezing and hindering the valve function. A control valve having a small change in characteristics can be provided.

Further, for example, when the fuel cell system is stopped, purge operation with an inert gas such as air or nitrogen gas or a system fluid is performed, so that the water remaining in the control valve 10, the plunger 40 and the plan The water staying between the jar tube 38 first reaches the groove-shaped flow path 48 formed on the outer periphery of the distal end portion 40 b of the plunger 40 from the valve chamber 62.
Then, it passes through the axial flow path 50 formed on the outer periphery of the tip end portion 42c of the plunger 42 on the plunger 40 side. Further, it can be pushed out through a system flow path 80 that passes through the radial flow path 52 of the suction element 42 and reaches the second port 54 in the axial direction formed at the center of the suction element 42.

  Therefore, it is difficult for water to adhere and remain, it can be efficiently thawed with a heating fluid, and the valve function can be effectively prevented from being disturbed, the change in valve characteristics due to temperature change is small, and water adheres. Therefore, it is possible to provide the control valve 10 that does not easily remain.

  In the control valve 10 of the present invention configured as described above, when the electromagnetic coil 66 is energized, the plunger 40 moves in the direction of the attracting element 42 against the urging force of the plunger spring 31, and the plunger 40 moves downward, the valve body 44 at the center of the tip 40b of the plunger 40 is separated from the valve seat 30, and the valve port 28 formed in the valve seat 30 is opened. .

  On the other hand, by stopping energization of the electromagnetic coil 66, the urging force of the plunger spring 31 causes the plunger 40 to move away from the attractor 42, and the plunger 40 moves upward. The valve body 44 at the center of the front end portion 40b of the 40 is in contact with the valve seat 30 so that the valve port 28 formed in the valve seat 30 is closed.

  FIG. 7 is a longitudinal sectional view schematically showing a solenoid valve which is a control valve according to another embodiment of the present invention, and FIG. 8 is a sectional view taken along line AA of the control valve of FIG.

  The control valve 10 of this embodiment has basically the same configuration as the control valve 10 of the first embodiment shown in FIGS. 1 to 6, and the same reference numerals are given to the same components. Detailed description thereof will be omitted.

  In the control valve 10 of this embodiment, as shown in FIG. 7 and FIG. 8, the first mounting attachment is provided from the outer peripheral gap S1 of the valve seat member 20 to a part of the outer peripheral gap S2 of the plunger tube 38. A recess 82 is formed. The first heating medium flow path forming member 84 is mounted in the first mounting recess 82.

  Similarly, a second mounting recess 86 is formed in a part of the gap S2 on the outer periphery of the plunger tube 38 and in the gap S3 on the outer periphery of the suction element 42. The second heating medium flow path forming member 88 is mounted in the second mounting recess 86.

  Also, a first heating medium flow path forming member 84 mounted in the first mounting recess 82 and a second heating medium flow path forming member 88 mounted in the second mounting recess 86. A space S <b> 4 that forms a part of the heating medium flow path 76 is formed in the space.

  In this embodiment, the first warm medium flow path forming member 84 and the second warm medium flow path forming member 88 are formed of a porous member, whereby the warm medium flow path 76 is formed. It is comprised so that a part may be formed.

  In this embodiment, both the first warm medium flow path forming member 84 and the second warm medium flow path forming member 88 are made of magnetic members.

  By configuring in this way, the first warm medium flow path forming member 84 and the second warm medium flow path forming member 88 are composed of magnetic members, and as indicated by the arrow D in FIG. In addition, the magnet coil 66, the first heating medium flow path forming member 84 made of a magnetic member, the plunger 40, the attractor 42, the second heating medium flow path forming member 88 made of a magnetic member, and the magnetism reaching the electromagnetic coil 66. A circuit will be formed.

Thereby, the magnetic resistance between the electromagnetic coil 66 and the plunger 40 and the magnetic resistance between the electromagnetic coil 66 and the attractor 42 can be reduced by the first heating medium flow path forming member 84. .
Therefore, the magnetomotive force required for the movement of the plunger 40, that is, the opening and closing of the valve body 44 is reduced, and the electromagnetic coil 66 can be designed to be small. As a result, it is compact and necessary for operating the control valve. Power consumption can be reduced.

  In addition, as a porous member which consists of a magnetic member which comprises such 1st warm-medium flow path formation member 84 and 2nd warm-medium flow path formation member 88, although it does not specifically limit, For example, It can be composed of steel wool made of SUS430, mesh, sintered metal, or the like.

  As described above, the first heating medium channel forming member 84 and the second heating medium channel are formed in a part of the heating medium channel 76, that is, in the first mounting recess 82 and the second mounting recess 86. By only attaching the forming member 88, the flow path can be formed, and the cost can be reduced.

  In the case of this embodiment, the first warm medium flow path forming member 84 and the second warm medium flow path forming member 88 are made of magnetic members. Of course, a material that is not a magnetic member is selected. It is also possible.

  9 is a cross-sectional view similar to FIG. 8 showing another embodiment of the control valve of the present invention, FIG. 10 is a perspective view of the first heating medium flow path forming member 84 of the control valve of FIG. 9, and FIG. These are sectional drawings similar to FIG. 8 which shows another Example of the control valve of this invention.

  The control valve 10 of this embodiment has basically the same configuration as that of the control valve 10 of the second embodiment shown in FIGS. 7 to 8, and the same reference numerals are assigned to the same components. Detailed description thereof will be omitted.

  In the control valve 10 of the second embodiment shown in FIGS. 7 to 8, the first warm medium flow path forming member 84 and the second warm medium flow path forming member 88 are made of a porous member. On the other hand, in the control valve 10 of this embodiment, as shown in FIGS. 9 and 10, the inner periphery side of the first warm medium flow path forming member 84 and the second warm medium flow path forming member 88. In addition, a plurality of groove-shaped flow paths 90 extending in the axial direction are formed, and the flow path 90 is configured to form part of the heating medium flow path 76.

  In the control valve 10 of this embodiment, a plurality of groove-shaped flow paths 90 are formed on the inner peripheral side of the first warm medium flow path forming member 84 and the second warm medium flow path forming member 88. As shown in FIG. 11, a plurality of groove-shaped channels 90 may be formed on the outer peripheral sides of the first warm medium channel forming member 84 and the second warm medium channel forming member 88.

  Further, although not shown, the first warm medium flow path forming member 84 is formed with a flow path 90 on the inner peripheral side, and the second warm medium flow path forming member 88 is provided with a flow path 90 on the outer peripheral side. It can also be formed. On the other hand, the first warm medium flow path forming member 84 is formed with a flow path 90 on the outer peripheral side, and the second warm medium flow path forming member 88 is formed with a flow path 90 on the inner peripheral side. It is also possible to form.

  In addition, a groove-shaped flow path 90 is formed on at least one of the inner peripheral side and the outer peripheral side in each of the first warm medium flow path forming member 84 and the second warm medium flow path forming member 88. It is also possible.

  Furthermore, in the control valve 10 of this embodiment, a plurality of groove-shaped flow paths 90 extending in the axial direction are formed, but the shape and number of the grooves are not particularly limited. For example, the grooves extending in a spiral shape The shape of the channel 90 can be changed as appropriate.

  Further, similarly to the control valve 10 of the second embodiment, the first warm medium flow path forming member 84 and the second warm medium flow path forming member 88 can be formed of magnetic members.

  By configuring in this way, a groove-shaped flow path 90 is provided on at least one of the inner peripheral side or the outer peripheral side of the first warm medium flow path forming member 84 and the second warm medium flow path forming member 88. Since it only needs to be formed, processing is easy and the cost can be reduced.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this. For example, the first warm medium flow path forming member 84 and the second warm medium flow path formation are described. The member 88 includes a porous member such as the control valve 10 of the second embodiment, and a heating medium flow channel in which a groove-shaped flow channel 90 is formed on at least one of the inner peripheral side and the outer peripheral side as in the third embodiment. It can also be configured in combination with a forming member.

  Further, as shown in FIG. 12, a porous member such as the control valve 10 of the second embodiment is disposed on the inner peripheral side or the outer peripheral side, and the outer peripheral side or the inner peripheral side is as in the third embodiment. It is also possible to arrange a heating medium flow path forming member in which a groove-shaped flow path 90 is formed on at least one side of the inner peripheral side or the outer peripheral side.

  Further, in the above-described embodiment, the system fluid passes through the axial flow path 50 formed on the outer periphery of the distal end portion 42 c of the suction element 42 on the plunger 40 side and the radial flow path 52 of the suction element 42. This was applied to the control valve 10 in which the system flow path 80 reaching the second port 54 in the axial direction formed at the center of the suction element 42 is formed.

  However, a normal control valve in which a system flow path is not formed in the suction element 42, further, a valve chamber through which a wetting fluid flows and a drive unit in which a plunger or the like is accommodated are separated by a diaphragm, and a drive space and The present invention can also be applied to a control valve in which a communication passage communicating with the outside of the control valve is provided in the suction element.

  In the above embodiment, the control valve disposed in the wet fluid flow path in the fuel cell system of the fuel cell vehicle has been described. For example, the control valve for a cooling circuit such as an air conditioner, a water heater, a control valve for a plant, etc. Various modifications can be made without departing from the object of the present invention.

  The control valve for controlling the fluid can be applied to, for example, a control valve that is disposed in the wet fluid flow path of the fuel cell system and is suitable for controlling the wet fluid.

DESCRIPTION OF SYMBOLS 10 Control valve 11 Opening part 12 for attractor attachment Valve main body 14 1st valve main body 14a Step part 14b Mounting hole 14c Concave part 16 for fastening 2nd valve main body 16a Concave part 18 for fastening Valve seat attachment opening part 20 Valve seat member 20a Base end portion 20b Fastening screw 20c Large diameter portion 20d Seal groove portion 22 Fastening nut 24 Seal member 26 Port 26a Step portion 28 Valve port 30 Valve seat 31 Plunger spring 32 Filter 34 Fastener 36 Drive portion 38 Plunger tube 40 Plunger 40a Base end portion 40b Tip end portion 42 Suction element 42a Base end portion 42b Fastening screw 42c Tip end portion 42d Intermediate portion 42e Seal groove 44 Valve body 46 Fastening nut 48 Channel 50 Channel 52 Channel 54 First port 54a Step 56 Filter 58 Fastener 60 Sealing member 61 Mold resin 62 Valve chamber 64 Coil bobbin 64a Irbobbin body 64b Flange portion 64c Winding portion 64d Upper extension portion 64e Lower extension portion 66 Electromagnetic coil 68 Outer box member 68a Outer box member body 68b Bottom plate member 68b
70 Seal member 72 Seal member 74 First heating medium port 76 Heating medium channel 78 Second heating medium port 80 System channel 82 Mounting recess 84 Heating medium channel forming member 86 Mounting recess 88 Heating medium channel formation Member 90 Flow path 100 Control valve 102 Valve body 104 Inlet port 105 Outlet port 106 Valve port 108 Valve seat 110 Valve chamber 112 Driving part 114 Fastening member 116 Plunger tube 118 Plunger 120 Suction element 122 Plunger spring 124 Insert fitting 126 Valve Rod member 130 Fastening screw 132 Nut 134 Outer box member 136 Electromagnetic coil 140 Drive space 142 Diaphragm valve element 144 Separation membrane part 146 Valve element part 148 Fixing part 150 Fixing fitting 152 Tapered surface 200 Control valve 202 Diaphragm 204 Valve chamber 206 Drive part 208 Valve body 210 Heat medium flow path 212 Valve body 214 Valve seat S1 Gap S2 Gap S3 Gap S4 Space ΔP Pressure change φF Effective pressure receiving diameter

Claims (9)

A valve chamber with a valve seat having a valve port through which fluid passes;
A drive unit that moves the valve body in the direction of separating and contacting the valve seat;
The valve is moved by the drive unit in a direction in which the valve body is moved away from or in contact with the valve seat, and the valve body is configured to open and close the valve port of the valve seat,
A control valve characterized in that a heating medium flow path is formed on the outer peripheral side of the valve seat and the drive unit.   2. The control valve according to claim 1, wherein the drive unit includes a valve body, a plunger, and a suction element, and a heating medium flow path is provided on an outer peripheral side of these members.   The control valve according to claim 2, wherein the driving unit includes a plunger tube, and a heating medium flow path is formed so as to be in contact with an outer periphery of the plunger tube.   The control valve according to any one of claims 1 to 3, wherein a heating medium channel forming member in which a channel is formed is attached to the heating medium channel.   The control valve according to claim 4, wherein the heating medium flow path forming member is made of a magnetic member.   The control valve according to claim 4, wherein the heating medium flow path forming member is made of a porous member.   7. A groove-shaped flow path is formed in the warm medium flow path forming member on at least one side of an inner peripheral side or an outer peripheral side of the warm medium flow path forming member. A control valve according to any one of the above.   The warm medium flow path forming member is disposed on the outer peripheral side of the valve seat and the plunger, and the second warm medium flow path is disposed on the outer peripheral side of the suction element. The control valve according to claim 2, comprising a forming member.   The control valve is a control valve in which a system fluid flow path is formed from the valve chamber to the outer periphery of the plunger, the outer periphery of the suction element, and the flow path formed in the axial direction at the center of the suction element. The control valve according to claim 1, wherein the control valve is provided.

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