JP2021055732A - Electromagnetic valve - Google Patents

Abstract

To provide an electromagnetic valve which can facilitate adjustment of a passage cross sectional area and a guide function and enables improvement of productivity and/or reduction of manufacturing costs.SOLUTION: The invention relates to an electromagnetic valve configured to connect a first through hole 32 with second through holes 33 through a valve element chamber 9 defined by a housing 2, a seat member 3, and a fixing core 6. A cylindrical filter member 8 is disposed in the valve element chamber 9 so as to face the second through holes 33 and enclose a valve element member 4. The filter member 8 has: a mesh part 81 through which a fluid passes; and a support frame part 82 made of a resin and supporting a mesh part 81 and is configured so that the fluid passes through the mesh part 81 when the fluid flows between the first through hole 32 and the second through holes 33. A passage 93 connected to the first through hole 32 is formed between an inner peripheral surface of the filter member 8 and an outer peripheral surface of the valve element member 4.SELECTED DRAWING: Figure 1

Description

The present invention relates to a solenoid valve.

For example, in German Patent Application Publication No. 102012202692, a solenoid valve in which the inner diameter of the seat member is reduced and the gap between the plunger and the seat member is reduced in order to suppress the runout of the plunger can be read from the figure. As a result, when the plunger swings, the plunger and the seat member come into contact with each other, and the swing of the plunger is suppressed. That is, the seat member exerts a guide function for guiding the movement of the plunger.

German Patent Application Publication No. 1020122026282

However, in the above solenoid valve, when trying to guide below the plunger in order to enhance the guide function, the first through hole (first entrance / exit) provided on the bottom surface of the seat member and the peripheral surface of the seat member are provided. The flow path connecting between the second through hole (second entrance / exit) is narrowed, that is, the flow path between the seat member and the plunger is narrowed. Here, in order to increase the flow path cross-sectional area of the flow path while maintaining the guide function, processing (cutting or the like) such as forming a groove in the plunger is required. Adjusting the flow path by processing the plunger is technically time-consuming and costly. That is, the solenoid valve has room for improvement in terms of productivity and manufacturing cost.

An object of the present invention is to provide a solenoid valve capable of easily adjusting the cross-sectional area of the flow path and the guide function, improving productivity and / or reducing the manufacturing cost.

The solenoid valve of the present invention includes a tubular housing, a seat member fixed to one end of the housing in the axial direction to form a valve seat and a first through hole, and a magnetic material arranged in the housing. A valve body member that is formed and moves so as to be in contact with and separated from the valve seat, an urging member that is arranged in the housing and urges the valve body member in the axial direction, and an axial direction of the housing. A fixed core fixed to the other end and formed of a magnetic material, a coil arranged on the outer peripheral side of the housing, and a second through hole provided in the housing or the seat member and extending in an axially intersecting direction. And, an electromagnetic valve configured to connect the first through hole and the second through hole via the housing, the seat member, and the valve body chamber partitioned by the fixed core. In the valve body chamber, a tubular filter member is arranged so as to face the second through hole and surround the valve body member, and the filter member is a mesh portion through which fluid passes. , A support frame portion formed of resin and supporting the mesh portion, and allowing the fluid to pass through the mesh portion when the fluid flows between the first through hole and the second through hole. A flow path connected to the first through hole is formed between the inner peripheral surface of the filter member and the outer peripheral surface of the valve body member.

According to the present invention, the size of the gap between the filter member and the valve body member, that is, the size of the flow path cross-sectional area and the size of the guide function can be adjusted according to the shape and arrangement position of the filter member. For example, the smaller the gap, the smaller the cross-sectional area of the flow path and the higher the guide function. The shape of the filter member may be changed by changing the design of the resin support frame portion, which can be performed easily and at low cost as compared with the processing of the valve body member including the magnetic material. That is, according to the present invention, the cross-sectional area of the flow path and the guide function can be easily adjusted, and the productivity can be improved and / or the manufacturing cost can be reduced.

It is a block diagram (cross-sectional view) of the solenoid valve of this embodiment. It is a side view of the filter member of this embodiment. It is the figure which looked at the filter member of this embodiment from the other side in the axial direction. It is a block diagram (cross-sectional view) of the solenoid valve of the 1st modification of this embodiment. It is a figure which looked at the filter member of the 1st modification of this embodiment from the other side in the axial direction. It is a block diagram (cross-sectional view) of the solenoid valve of the 2nd modification of this embodiment. It is the figure which looked at the filter member of the 2nd modification of this embodiment from one side in the axial direction. It is the figure which looked at the filter member of the 2nd modification of this embodiment from one side in the axial direction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the following examples, parts that are the same or equal to each other are designated by the same reference numerals in the drawings. In addition, each figure used for explanation is a conceptual diagram.

As shown in FIG. 1, the solenoid valve 1 of the present embodiment includes a housing 2, a seat member 3, a valve body member 4, an urging member 5, a fixed core 6, a coil unit 7, and a filter member 8. And have. The solenoid valve 1 is a normally closed type solenoid valve that closes in a non-energized state. Hereinafter, in the description, the axial direction means the axial direction of the valve body member 4.

The housing 2 is formed in a tubular shape. The housing 2 includes a sleeve 21 and a valve body 22. The sleeve 21 is a cylindrical metal member. The valve body 22 is a cylindrical metal member and is arranged on one side in the axial direction of the sleeve 21. The valve body 22 is fixed to the sleeve 21. The inner diameter of the valve body 22 is smaller than the inner diameter of the sleeve 21.

The seat member 3 is a metal member that is fixed to one end in the axial direction of the housing 2 and forms the valve seat 31 and the first through hole 32. The seat member 3 is formed in a bottomed cylindrical shape and is fixed to the valve body 22. A first through hole 32 extending in the axial direction is provided on the bottom surface portion of the seat member 3. An annular portion around the first through hole 32 of the seat member 3 constitutes the valve seat 31. The valve seat 31 is formed in a tapered shape.

A second through hole 33 extending in a direction intersecting the axial direction (here, an orthogonal direction) is formed in the peripheral surface portion of the seat member 3. A plurality of second through holes 33 are formed in the circumferential direction. The first through hole 32 is one entrance / exit (port) of the solenoid valve 1, and the second through hole 33 is the other entrance / exit (port) of the solenoid valve 1.

The valve body member 4 is a columnar member that is arranged in the housing 2, is formed including a magnetic material, and moves so as to be in contact with and separated from the valve seat 31. The valve body member 4 includes a movable core 41 made of a magnetic material and a spherical valve body 42 arranged at one end in the axial direction of the movable core 41. The movable core 41 is also called a plunger. In the movable core 41, the diameter of the small diameter portion 411 on one side in the axial direction is smaller than the diameter of the large diameter portion 412 on the other side in the axial direction. The small diameter portion 411 is arranged in the valve body 22, and the large diameter portion 412 is arranged in the sleeve 21. A plurality of flow paths 4a extending in the axial direction are formed in the large diameter portion 412. The flow path 4a may be provided on the outer peripheral surface of the large diameter portion 412 (in a groove shape), or may be formed by a through hole penetrating the large diameter portion 412 in the axial direction.

The valve body 42 is a metal member, and abuts (seats) or separates (separates) from the valve seat 31 as the movable core 41 moves in the axial direction. The valve body 42 may be fixed to the movable core 41. When the valve body 42 is seated on the valve seat 31 and the first through hole 32 is closed, the solenoid valve 1 is closed. On the other hand, when the valve body 42 is partially separated from the valve seat 31 and the first through hole 32 is opened, the solenoid valve 1 is opened. The valve body 42 is made of metal.

The urging member 5 is a spring that is arranged in the housing 2 and urges the valve body member 4 in the axial direction. The urging member 5 is arranged between the valve body member 4 and the fixed core 6, and urges the valve body member 4 in one axial direction (toward the valve seat 31).

The fixed core 6 is a columnar member fixed to the other end of the housing 2 (sleeve 21) in the axial direction and formed of a magnetic material. The coil unit 7 is arranged on the outer peripheral side (outer peripheral surface) of the housing 2. The coil unit 7 includes a coil 71 and a yoke 72. The coil 71 is fixed to the housing 2 via the yoke 72. The coil 71 may be fixed to a member other than the housing 2.

When the coil 71 is energized, a magnetic circuit is formed by the yoke 72, the fixed core 6, and the movable core 41. In other words, when the coil 71 is energized, the fixed core 6 and the movable core 41 are excited. When the coil 71 is energized, a force in a direction approaching the fixed core 6 (hereinafter referred to as "electromagnetic force") is applied to the movable core 41. The yoke 72 may be made of a resin that does not form a magnetic circuit.

The movable core 41 is also axially unidirectional due to the differential pressure between the hydraulic pressure of the external flow path connected to the first through hole 32 and the hydraulic pressure of the external flow path connected to the second through hole 33. A force is applied to the side or the other side to press the movable core 41. Therefore, when the electromagnetic force exceeds the sum of the force due to the differential pressure (plus or minus) and the urging force of the urging member 5, the movable core 41 moves to the other side in the axial direction, and the solenoid valve 1 opens.

The solenoid valve 1 is configured so that the first through hole 32 and the second through hole 33 are connected to each other via a valve body chamber 9 partitioned by a housing 2, a seat member 3, and a fixed core 6. .. The valve body chamber 9 communicates the first through hole 32 and the second through hole 33 in a state where the valve body member 4 is separated from the valve seat 31 (the solenoid valve 1 is in the valve open state). The valve body chamber 9 can be said to be the internal space of the solenoid valve 1 that houses the valve body member 4.

The fluid flows from the first through hole 32 to the second through hole 33 or from the second through hole 33 to the first through hole 32 through the valve body chamber 9. The valve body chamber 9 includes a first chamber 91 facing one end surface in the axial direction of the movable core 41 with respect to the large diameter portion 412, and a second chamber (rear chamber) facing the other end surface in the axial direction of the large diameter portion 412. 92 and. The first chamber 91 and the second chamber 92 communicate with each other via a flow path 4a provided in the movable core 41.

(Filter member)
In the valve body chamber 9, a tubular filter member 8 is arranged so as to face the second through hole 33 and surround the valve body member 4. The filter member 8 of the present embodiment is formed in a cylindrical shape, surrounds the small diameter portion 411 of the movable core 41 and the valve body 42 in the first chamber 91 of the valve body chamber 9, and faces the second through hole 33. Is arranged. The filter member 8 is a member for suppressing the passage of foreign matter.

The filter member 8 has a mesh portion 81 through which the fluid passes, and a support frame portion 82 formed of resin and supporting the mesh portion 81. The filter member 8 is configured so that the fluid passes through the mesh portion 81 when the fluid flows between the first through hole 32 and the second through hole 33.

The mesh portion 81 is a member formed of a resin in a mesh shape. The mesh portion 81 is formed in a flexible plate shape and forms a part of the peripheral surface (peripheral wall) of the filter member 8. The filter member 8 has a plurality of mesh portions 81. When foreign matter is mixed in the fluid, only the foreign matter is caught in the mesh portion 81 and the passage is blocked.

The support frame portion 82 is a frame-shaped resin member fixed to the entire circumference of the edge portion of the mesh portion 81. The support frame portion 82 is formed in a cylindrical shape as a whole. A plurality of openings 82a in which the mesh portion 81 is arranged are formed on the peripheral surface of the support frame portion 82. The support frame portion 82 of the present embodiment is formed to be thicker (that is, wider in the radial direction) than the mesh portion 81 in order to secure the support strength.

Further, on the outer peripheral surface of the support frame portion 82, an annular protruding portion 82b that protrudes outward in the radial direction and comes into contact with the seat member 3 is formed. The protruding portion 82b is formed at the other end of the support frame portion 82 in the axial direction (second annular portion 822 described later). The protruding portion 82b is formed on the other side in the axial direction with respect to the mesh portion 81. The protrusion 82b positions the filter member 8 in the radial direction and partitions the outer peripheral chamber 94, which will be described later.

The support frame portion 82 may be integrally molded with, for example, the same resin as the mesh portion 81, or may be integrally formed with the mesh portion 81 by insert molding including a separately manufactured mesh portion 81. Further, the mesh portion 81 may be formed of another material (metal or the like).

As shown in FIGS. 2 and 3, as an example of the configuration, the support frame portion 82 has an annular first annular portion 821 forming an axial one end and an annular second annular portion forming an axial other end. A portion 822 and a plurality of columnar portions 823 extending in the axial direction connecting the first annular portion 821 and the second annular portion 822 are provided. FIG. 3 is a conceptual diagram of the other end surface of the filter member 8 in the axial direction, and shows the position of the mesh portion 81 for the sake of explanation. In addition to the annular portions 821 and 822, one or more annular portions may be arranged. Further, the columnar portion 823 may be formed so as to be inclined with respect to the axial direction.

The plurality of mesh portions 81 are arranged at equal intervals in the circumferential direction. Each mesh portion 81 is surrounded and supported by a first annular portion 821, a second annular portion 822, and two columnar portions 823. That is, the opening 82a in which the mesh portion 81 is arranged is partitioned by the first annular portion 821, the second annular portion 822, and the two columnar portions 823.

The filter member 8 is press-fitted and fixed to the inside of the sheet member 3, for example. One end surface of the support frame portion 82 in the axial direction is in contact with the bottom surface of the seat member 3. Further, the other end surface of the support frame portion 82 in the axial direction is in contact with one end surface of the housing 2 (valve body 22) in the axial direction. With this configuration, the filter member 8 is positioned in the axial direction.

The protruding portion 82b is in contact with the seat member 3 on the other side in the axial direction from the second through hole 33. Therefore, the fluid passing through the second through hole 33 passes through the outer peripheral chamber 94 partitioned by the filter member 8 and the seat member 3 in the valve body chamber 9. That is, when the fluid passes through the solenoid valve 1, the fluid always passes through the outer peripheral chamber 94 and the mesh portion 81. As described above, the filter member 8 is configured so that when the fluid passes through the solenoid valve 1 through the first through hole 32 and the second through hole 33, the fluid always passes through the mesh portion 81. The outer peripheral chamber 94 is a closed region (space) other than the mesh portion 81 and the second through hole 33, and is formed in the first chamber 91 of the valve body chamber 9.

The support frame portion 82 is arranged coaxially with the valve body member 4. The inner peripheral surface of the support frame portion 82 is cylindrical, and a certain gap is formed between the support frame portion 82 and the movable core 41. In this way, a flow path 93 connected to the first through hole 32 is formed between the inner peripheral surface of the filter member 8 and the outer peripheral surface of the valve body member 4.

(Effect of this embodiment)
As described above, by arranging the filter member 8 in the valve body chamber 9, a flow path 93 is formed between the filter member 8 and the valve body member 4. The flow path 93 connects the mesh portion 81 and the first through hole 32. The second through hole 33 opens in the outer peripheral chamber 94 partitioned by the filter member 8 in the valve body chamber 9. Therefore, the fluid passing through the solenoid valve 1 passes through the second through hole 33, the outer peripheral chamber 94, the mesh portion 81, the flow path 93, and the first through hole 32.

In this way, the flow path 93 is a place where the fluid always passes through when passing through the solenoid valve 1. Therefore, the flow path cross-sectional area of the flow path 93 affects the flow rate of the solenoid valve 1 (the amount of fluid passing through per unit time). That is, the flow rate of the solenoid valve 1 can be adjusted by adjusting the shape and arrangement of the filter member 8. The "flow path cross-sectional area" is the area of a cross section obtained by cutting the flow path in a plane orthogonal to the fluid flow direction (flow direction of the flow path).

Further, since the filter member 8 is arranged on the outer peripheral side of the valve body member 4, when the valve body member 4 swings, it comes into contact with the filter member 8 and the swing is suppressed. That is, the filter member 8 exerts a guide function for guiding the movement of the valve body member 4 in the axial direction. According to the present embodiment, the filter member 8 has a flow path forming function and a guide function in addition to its own filter function.

Therefore, according to the present embodiment, the gap between the filter member 8 and the valve body member 4, that is, the flow path cross-sectional area of the flow path 93 and the size of the guide function can be adjusted according to the shape and arrangement position of the filter member 8. it can. For example, the smaller the gap, the smaller the cross-sectional area of the flow path and the higher the guide function. The shape of the filter member 8 may be changed by changing the design of the resin support frame portion 82, which can be performed easily and at low cost as compared with the processing of the valve body member 4 containing the magnetic material. Processing of resin is easier than processing of magnetic material. That is, according to the present embodiment, the cross-sectional area of the flow path and the guide function can be easily adjusted, and the productivity can be improved and / or the manufacturing cost can be reduced.

(First modification)
As a first modification of the present embodiment, as shown in FIGS. 4 and 5, the support frame portion 82 is provided with a rib 82c protruding toward the valve body member 4. The rib 82c is formed of resin on the inner peripheral surface of the support frame portion 82. The rib 82c is integrally molded with the support frame portion 82 as a part of the support frame portion 82.

The flow path cross-sectional area and the guide function change depending on the shape, position, number, and the like of the ribs 82c. The rib 82c is easy to form. Therefore, the designer can more easily adjust the flow path cross-sectional area and the guide function. The separation distance between the filter member 8 and the valve body member 4 (the radial width of the flow path 93) is small in the portion where the rib 82c is provided, and is large in the other portion.

For example, as shown in FIG. 5, by forming a plurality of ribs 82c on the inner peripheral surface of the support frame portion 82 (for example, at equal intervals in the circumferential direction), the cross-sectional area of the flow path is increased by the gap between the ribs 82c. While ensuring, the rib 82c can reduce the separation distance between the valve body member 4 and the filter member 8 and enhance the guide function. The number of ribs 82c may be one. Further, the rib 82c may be formed over the entire inner peripheral surface of the support frame portion 82 (that is, in an annular shape).

In this example, the rib 82c is provided at the other end in the axial direction (second annular portion 822) of the filter member 8. In other words, the rib 82c is provided on the other side (fixed core 6 side) in the axial direction from the mesh portion 81. The minimum value of the flow path cross-sectional area of the flow path 93 is determined by the portion of the filter member 8 where the rib 82c is provided. The position of the rib 82c is not limited to the above, and may be provided at the axial central portion (columnar portion 823) or the axial one end portion (first annular portion 821) of the filter member 8.

(Second modification)
As a second modification of the present embodiment, the filter member 8 is configured such that the minimum value of the flow path cross-sectional area of the flow path 93 is smaller than the minimum value of the flow path cross-sectional area of the first through hole 32. (Hereinafter, this configuration is also referred to as a "flow path reduction configuration"). 7 and 8 are conceptual views of the filter member 8 viewed from one side in the axial direction, and show the cross section of the flow path 93 and the cross section of the flow path of the first through hole 32 for explanation. There is.

In the examples shown in FIGS. 6 and 7, the rib 82c is provided at one end in the axial direction (first annular portion 821) of the filter member 8. That is, in this example, the rib 82c is formed on one side in the axial direction with respect to the mesh portion 81. The rib 82c is formed in an annular shape so as to surround the valve body member 4. Further, the radial width (protruding width) of the rib 82c is constant. Therefore, the radial width of the flow path 93 formed by the rib 82c and the valve body member 4 is constant in the initial state.

The flow path cross-sectional area of the flow path 93 is the minimum value at the portion of the flow path 93 formed by the rib 82c. That is, the minimum value of the flow path cross-sectional area of the flow path 93 is adjusted by the rib 82c. The diameters of the first through hole 32 and the second through hole 33 are constant in the fluid flow direction (that is, the flow path cross-sectional area is also constant).

According to the configuration of this example, the flow path cross-sectional area and the guide function of the flow path 93 can be easily adjusted without processing the movable core 41 as described above. Further, in this example, the radial width (gap) of the flow path 93 is small, and the guide function is high. Further, in this example, since the rib 82c is provided on one side of the filter member 8 in the axial direction, the guide function is exhibited at the tip end side (first through hole 32 side) of the movable core 41. That is, since the portion of the movable core 41 on the side where the runout is large is guided by the rib 82c, the guide function (that is, the runout suppression function) is further enhanced.

Further, in this example, the minimum value of the flow path cross-sectional area of the flow path 93 is the flow path cross-sectional area of all the flow paths formed including the first through hole 32, the flow path 93, and the second through hole 33. It is the minimum value (hereinafter, this configuration is also referred to as "minimum flow path forming configuration"). That is, the minimum value of the flow path cross-sectional area of all the flow paths formed by the solenoid valve 1, that is, the flow path through which the fluid passes when passing through the solenoid valve 1, is determined by the flow path 93. Therefore, in designing the flow rate of the solenoid valve 1, it is not necessary to reduce the flow path cross-sectional area of the first through hole 32 and the second through hole 33.

In the conventional configuration, in most cases, the flow path cross-sectional area of the first through hole 32 is the minimum value in the flow path cross-sectional area of all the flow paths of the solenoid valve 1. Therefore, when designing the flow rate of the solenoid valve 1, the diameter of the first through hole 32 is adjusted. The minimum value of the flow path cross-sectional area of all the flow paths has a great influence on the flow rate of the solenoid valve 1.

However, the smaller the diameter of the first through hole 32 in order to reduce the flow rate, the more difficult it becomes to perform the stroke inspection. The stroke inspection is an inspection of the stroke (moving distance) of the valve body member 4, and is performed, for example, by inserting an inspection rod into the first through hole 32 or irradiating a laser. Therefore, the smaller the diameter of the first through hole 32, the more difficult it is for the inspection rod or laser to enter the valve body chamber 9, and the more difficult the stroke inspection becomes.

Here, according to the flow path reduction configuration (minimum value of the flow path cross-sectional area of the flow path 93 <minimum value of the flow path cross-sectional area of the first through hole 32), in the main part where the first through hole 32 determines the flow rate. Therefore, it is not necessary to reduce the first through hole 32 when reducing the flow rate. As a result, the adverse effect on the workability of the stroke inspection due to the flow rate adjustment can be avoided. For example, the diameter of the first through hole 32 can be increased to improve the workability of the stroke inspection. As described above, according to the flow path reduction configuration, in addition to the effect of the above-described embodiment, the workability of the stroke inspection can be improved.

Further, according to the minimum flow path forming configuration (minimum value of the flow path cross-sectional area of the flow path 93 = minimum value of the flow path cross-sectional area of all flow paths), the flow rate is mainly determined by the flow path 93. It is not necessary to reduce the diameter of the second through hole 33. Therefore, for example, each second through hole 33 can be enlarged to suppress the occurrence of foreign matter clogging. Further, for example, the flow rate of the solenoid valve 1 can be adjusted only by deforming the shape of the filter member 8, and the flow rate design becomes easy. In most cases, if the flow path is reduced, the minimum flow path is formed. Since the minimum value of the flow path cross-sectional area of the flow path 93 is smaller than the minimum value of the flow path cross-sectional area of the second through hole 33, it is not necessary to reduce the second through hole 33, and the above effect is exhibited. Will be done.

Further, in the second modification, as shown in FIG. 8, a recess may be formed in a part of the annular rib 82c to expand the flow path. Further, a plurality of non-annular ribs 82c may be arranged in the circumferential direction. With these configurations, the minimum value of the flow path cross-sectional area of all the flow paths can be easily adjusted.

(Other)
The present invention is not limited to the above embodiment. For example, the second through hole 33 may be formed in the housing 2 (for example, the valve body 22) instead of the seat member 3. In this case, for example, the seat member 3 is formed in an annular shape, and the housing 2 is fixed to the outer peripheral side of the seat member 3. In this case, the outer peripheral chamber 94 is partitioned by the inner peripheral surface of the housing 2 and the outer peripheral surface of the filter member 8. For example, the filter member 8 is press-fitted and fixed inside the housing 2. As an example, in the present embodiment (for example, FIG. 1), the valve body 22 extends to a position corresponding to one end in the axial direction of the filter member 8, and the seat member 3 projects radially inward from the valve body 22. , Fixed to the valve body 22. In other words, the peripheral wall portion of the seat member 3 constitutes a part of the housing 2. Even with such a configuration, the same effect as described above is exhibited. That is, the second through hole 33 may be formed in the seat member 3 or the housing 2.

Further, instead of the protruding portion 82b of the filter member 8, a protruding portion protruding inward in the radial direction may be formed on the seat member 3 or the housing 2. As a result, the filter member 8 is positioned in the radial direction, and the outer peripheral chamber 94 is also partitioned. Further, the number of the second through holes 33 may be one.

Further, the solenoid valve 1 may be a normally open type solenoid valve that opens in a non-energized state. In this case, the urging member 5 urges the valve body member 4 to the other axial direction (toward the fixed core 6). The urging member 5 may be arranged, for example, between the valve body 22 and the large diameter portion 412 of the movable core 41. The same effect as described above is exhibited by the normally open type solenoid valve 1.

1 ... solenoid valve, 2 ... housing, 3 ... seat member, 31 ... valve seat, 32 ... first through hole, 33 ... second through hole, 4 ... valve body member, 5 ... urging member, 6 ... fixed core, 71 ... coil, 8 ... filter member, 81 ... mesh part, 82 ... support frame part, 82c ... rib, 9 ... valve body chamber, 93 ... flow path.

Claims (4)

With a tubular housing
A seat member fixed to one end in the axial direction of the housing to form a valve seat and a first through hole, and a seat member.
A valve body member arranged in the housing, formed including a magnetic material, and moving so as to be in contact with and separated from the valve seat
An urging member arranged in the housing and urging the valve body member in the axial direction,
A fixed core fixed to the other end in the axial direction of the housing and made of a magnetic material,
The coil arranged on the outer peripheral side of the housing and
A second through hole provided in the housing or the seat member and extending in a direction intersecting the axial direction,
The solenoid valve is configured so that the first through hole and the second through hole are connected to each other via the housing, the seat member, and the valve body chamber partitioned by the fixed core. hand,
In the valve body chamber, a tubular filter member is arranged so as to face the second through hole and surround the valve body member.
The filter member has a mesh portion through which the fluid passes and a support frame portion formed of resin to support the mesh portion, and the fluid flows between the first through hole and the second through hole. The fluid is configured to pass through the mesh portion when
A solenoid valve in which a flow path connected to the first through hole is formed between the inner peripheral surface of the filter member and the outer peripheral surface of the valve body member. The solenoid valve according to claim 1, wherein the support frame portion is provided with a rib protruding toward the valve body member. The solenoid valve according to claim 1 or 2, wherein the minimum value of the flow path cross-sectional area of the flow path is smaller than the minimum value of the flow path cross-sectional area of the first through hole. The solenoid valve according to claim 1, 3, wherein the minimum value of the flow path cross-sectional area of the flow path is smaller than the minimum value of the flow path cross-sectional area of the second through hole.

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