JPH094735A - Solenoid valve - Google Patents

Abstract

PURPOSE: To facilitate the manufacture of a solenoid valve, and also to improve the magnetic efficiency of the solenoid body. CONSTITUTION: Flow passages 52 for communicating a first port 19 opened to a valve seat 7 with a second port 24 that is provided to the reverse side of the valve seat 7 of a movable member 4 or plunger are provided to the valve body 5 that is operatably connected to the magnetic-body-made movable member 4 that is reciprocatably inserted into the hollow part 3 of a solenoid body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve used for controlling various oils, pneumatic equipment and the like.

[0002]

2. Description of the Related Art A conventional solenoid valve of this type is shown in FIG.

That is, the solenoid valve 100 is configured so that the solenoid body 101 is energized / de-energized by
Plunger 10 as a movable member made of a magnetic material that is reciprocally inserted into a hollow portion 102 in a solenoid body 101.
3 is reciprocally driven to reciprocally move the rod 104 as the second valve body operatively connected to the plunger 103 and the ball 105 as the first valve body provided on the tip side of the rod 104 to reciprocate. It is a three-way valve that switches the pressure by bringing the two-valve seat 106 and the first valve seat 107 into contact and separation.

The solenoid valve 100 is composed of a solenoid body 101 and a valve body 108 having first and second valve seats 107 and 106 integrally attached to the solenoid body 101.

The solenoid body 101 includes a case 109 having both ends opened, and a hollow portion 1 housed in the case 109.
Coil 111 wound around bobbin 110 having 02
And to close one opening end of the case 109,
A closing part 112 integrally formed with the bobbin 110, a plunger 103 reciprocally inserted into the hollow part 102,
The case 10 is provided between the coil 111 and the closing portion 112.
Side plate 113 that guides the magnetic path from 9 to the plunger 103, and the valve body 10 facing the plunger 103.
The center plate 114 as a fixing member made of a magnetic material, which is provided on the eighth side.

The center plate 114 is a tubular member having an L-shaped half-section having a radially outward flange portion 114A, and the tubular portion 114B is the hollow portion 102 of the bobbin 110.
And the outer peripheral surface of the flange 114A is inserted into the case 10
The inner peripheral surface of 9 is abutted.

The valve body 108 has recesses 115 and 116 coaxially on both ends in the axial direction, and the recess 115 on the solenoid body 101 side has a larger diameter than the recess 116 on the opposite side thereof. 115 and the small-diameter recess 116 communicate with each other through a passage 117 formed as a first port penetratingly formed on the central axis.

The opening end of the passage 117 on the large-diameter recess 115 side, that is, the opening peripheral edge of the passage 117 on the bottom surface of the large-diameter recess 115 serves as the second valve seat 106, and the opening end on the small-diameter recess 116 side, that is, the opening end. A peripheral portion of the opening of the passage 117 on the bottom surface of the small-diameter recess 116 serves as the first valve seat 107.

An output port 118 is formed between the large-diameter recess 115 and the small-diameter recess 116 of the valve body 108 so as to communicate with the passage 117 in the radial direction.

In the small diameter recess 116, the ball 10 is
5 is inserted in the first valve seat 107 so that it can come into contact with and separate from the first valve seat 107. The movement of the ball 105 outward in the axial direction is restricted by a stopper 119 provided at the opening end of the small diameter recess 116. The stopper 119 has an input port 120.

On the other hand, a rod 104 is operatively connected to the plunger 103 of the solenoid body 101. That is, the plunger 103 has a hole 103A formed on the central axis opening to the valve body 108 side, and the rod 104 is press-fitted into the hole 103A to be operatively connected.

This rod 104 is used for the center plate 1.
14. The valve body 108 extends so as to face the large-diameter recess 115 of the valve body 108, and the end portion thereof comes into contact with and separates from the second valve seat 106. Further, a convex portion 104A that projects into the passage 117 and separates the ball 105 from the first valve seat 107, that is, for opening the passage 117 is integrally provided at the center of the end surface of the rod 104. There is.

Further, on the outer peripheral side of the rod 104, a coil spring 121 as a biasing means for biasing the plunger 103 in the direction of separating from the center plate 114 so as to separate the end portion of the rod 104 from the second valve seat 106.
Is provided.

The coil spring 121 has one end abutting on the end face of the plunger 103 and the other end abutting on the bottom face of the large-diameter recess 115 of the valve body 108 so that the plunger 103 is on the opposite side of the valve body 108. The plunger 103 is biased to the side and its movement in the axial direction is restricted by the closing portion 112. Further, the closing portion 112 has a drain port 122 as a second port formed so as to penetrate therethrough in the axial direction.

Further, the plunger 103 is provided with a passage 117.
And a flow path 123 that connects the drain port 122 with each other. As shown in FIG. 5, the flow path 123 has slits 12 on the outer periphery of the plunger 103 and the end surface on the side of the closed portion 122.
4 is provided. As the flow path 123, a vertical hole (not shown) may be provided in the plunger 103 so as to penetrate therethrough in the axial direction.

Here, the solenoid valve 10 having the above structure
The operation of 0 will be described.

When the coil 111 of the solenoid body 101 is not energized, the plunger 103 is biased toward the closing portion 112 by the spring force of the coil spring 121. As a result, the end of the rod 104 that is operatively connected to the plunger 103 is separated from the second valve seat 106, and the passage 117 and the drain port 122 are connected to the flow passage 123.
And the passage 117 and the output port 118 communicate with each other.

The end portion of the rod 104 has the second valve seat 10
6, the protrusion 104A at the tip of the rod 104 is retracted into the passage 117, and the protrusion 104A does not act on the ball 105. Therefore, the ball 105 moves toward the first valve seat 107 side by the fluid pressure from the input port 120, contacts the first valve seat 107, closes the passage 117, and closes the flow between the input port 120 and the passage 117. .

From these, the fluid when the solenoid main body 101 is not energized is the same as the arrow shown in FIG.
18 → passage 117 → large-diameter recess 115, inside center plate 114 → flow path 123 → drain port 122.

Next, the coil 11 of the solenoid body 101
1 is energized, the center plate 114 → case 109 → side plate 113 → plunger 103 →
The plunger 103 is magnetically attracted to the center plate 114 against the spring force of the coil spring 121 by the magnetic circuit including the magnetic path to the center plate 114.

As a result, the end portion of the rod 104 moves toward the second valve seat 106 side, contacts the second valve seat 106, and passes through the passage 11
7 is closed, and the flow of the passage 117, the flow path 123, and the drain port 122 is closed.

The end portion of the rod 104 has the second valve seat 10
6, the convex portion 1 at the tip of the rod 104
04A projects from the passage 117 and pushes the ball 105. Therefore, the ball 105 is separated from the first valve seat 107, and the input port 120 and the output port 118 communicate with each other via the passage 117.

From these, the fluid when the solenoid body 101 is energized flows from the input port 120 to the passage 117 to the output port 118.

[0024]

By the way, in the case of the above-mentioned prior art, the flow passage 123 for allowing the flow of fluid between the ports before and after the rod 104, that is, between the passage 117 and the drain port 122 is formed. Outer periphery of the plunger 103 and the drain port 1 for operating the rod 104
The slit 124 is provided on the end face on the 22 side, or a vertical hole is formed through the plunger 103 in the axial direction.

Therefore, there is a problem that the machining process of the plunger 103 is complicated, the cross-sectional area of the plunger 103 as a magnetic path is small, and the magnetic efficiency of the solenoid body 101 is lowered.

The rod 104 is the plunger 103.
Since it is operatively connected to the plunger 103 by being press-fitted into the hole 103 </ b> A or connected to the plunger 103, a step for connecting the plunger 103 is required, resulting in complication of manufacturing.

The present invention has been made in order to solve the above-mentioned problems of the prior art. The object of the present invention is to facilitate the manufacture and to improve the magnetic efficiency of the solenoid body. To provide a valve.

[0028]

In order to achieve the above object, according to the present invention, a movable member made of a magnetic material is reciprocally inserted into a hollow inside of a solenoid main body having an internal hollow, and the movable member. A valve body operatively connected to the member, a valve seat at which the valve body comes into contact with and away from the valve seat, a fixed member made of a magnetic material provided on the valve seat side and facing the movable member, and the valve seat. The solenoid main body is energized by including a first port that opens, a second port provided on the opposite side of the valve seat of the movable member, and a flow path that connects the second port and the first port. Thus, when the movable member is magnetically attracted to the fixed member side, in the solenoid valve which closes the first port by contacting the valve body with the valve seat, the flow passage is provided in the valve body. And

In the solenoid valve having the above-mentioned structure, the urging means for urging the movable member away from the fixed member so as to separate the valve body from the valve seat, and the valve body are formed through the movable member in the axial direction. Shall be inserted into the through hole,
It may be configured to include a seat of the biasing means having a diameter larger than that of the through hole provided in the axially intermediate portion of the valve body.

[0030]

In the solenoid valve having the above-described structure, the valve body is provided with the flow passage that connects the first port opened to the valve seat and the second port provided on the opposite side of the valve seat of the movable member. Therefore, it is not provided on the movable member. Therefore, the movable member is not processed, and the movable member can be easily manufactured. In addition, since the cross-sectional area of the magnetic path does not decrease, the magnetic efficiency of the solenoid body can be improved.

Further, it is assumed that the valve body is inserted into the through hole having the movable member, and the seat of the urging means for urging the movable member in the axially intermediate portion of the valve body in the direction away from the fixed member side. Since the valve is provided, the valve body can transmit the load of the biasing means to the movable member by the seat of the biasing means. This allows
It is possible to operatively connect the movable member and the valve body by the load of the urging means applied to the seat of the urging means included in the valve body without connecting the movable member and the valve body. For this reason, the manufacturing process is facilitated because there is no need for a bonding step as in the prior art.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. 1 and 2 showing a solenoid valve according to an embodiment of the present invention, reference numeral 1 denotes the entire solenoid valve. The solenoid valve 1 is a solenoid main body 2 which is energized / de-energized by energizing / de-energizing the solenoid main body 2.
A rod 4 as a second valve body operatively connected to the plunger 4 and a tip of the rod 5 are driven to reciprocate by moving a plunger 4 as a movable member made of a magnetic material, which is reciprocally inserted into a hollow portion 3 therein. It is a three-way valve that switches the pressure by reciprocally moving the ball 6 as the first valve body provided on the side to bring the second valve seat 7 and the first valve seat 8 into and out of contact with each other.

The solenoid valve 1 has a solenoid body 2
And a valve body 9 having first and second valve seats 8 and 7 integrally attached to the solenoid body 2.

The solenoid main body 2 closes the case 10 having both ends opened, the coil 12 wound around the bobbin 11 having the hollow portion 3 housed in the case 10, and one open end of the case 10. The closing portion 13, the plunger 4 reciprocally inserted into the hollow portion 3 via the sleeve 14, the side plate 15 for guiding the magnetic path from the case 10 to the plunger 4, and the valve body facing the plunger 4. The center plate 16 as a fixing member made of a magnetic material provided on the 9 side.

The closing portion 13 and the bobbin 11 are integrally molded of resin, and the side plate 15 is inserted during this molding. This side plate 1
5 is located between the coil 12 and the closed portion 13, the inner peripheral surface faces the hollow portion 3 and the outer peripheral surface is exposed, and the outer peripheral surface abuts the inner peripheral surface of the case 10. It is like this.

The center plate 16 is a tubular member having an L-shaped half-section having an outwardly facing flange portion 16A in the radial direction. The hollow portion 3 of the bobbin 11 is arranged so that the tubular portion 16B faces the plunger 4. Inserted into the flange 16A
The outer peripheral surface of the case contacts the inner peripheral surface of the case 10. Also, at the end of the cylindrical portion 16B on the plunger 4 side,
It has an inward flange portion 16C extending inward in the radial direction along the end face thereof, and enlarges the suction surface for the plunger 4.

The valve body 9 has recesses 17, 18 coaxially at both ends in the axial direction. The recess 17 has a larger diameter than the recess 18, and the large-diameter recess 17 serves as the solenoid body 2. As the side, the opening end face is brought into contact with the end face of the outward flange portion 16A of the center plate 16 to form the large-diameter recess 1
The valve main body 9 is integrally attached to the solenoid main body 2 by caulking the outward flange portion 171 extending radially outward along the open end surface of the case 7 at the open end portion of the case 10.

On the other hand, at the other open end of the case 10,
The closing portion 13 is caulked and fixed.

The large-diameter recess 17 and the small-diameter recess 18 of the valve body 9 communicate with each other through a passage 19 formed as a first port penetrating the central axis.

The open end of the passage 19 on the large-diameter recess 17 side,
That is, the opening peripheral edge of the passage 19 on the bottom surface of the large-diameter recess 17 is the second
It is a valve seat 7 and slightly protrudes toward the solenoid body 2. Further, the opening end of the small-diameter recess 18 side, that is, the small-diameter recess 1
The opening 1 of the passage 19 on the bottom of the passage 8 serves as the first valve seat 8, and the valve body is the ball 6, so the passage 1
The taper surface is such that the diameter thereof decreases toward 9.

An output port 20 is formed between the large-diameter recess 17 and the small-diameter recess 18 of the valve body 9 so as to communicate with the passage 19 so as to penetrate therethrough in the radial direction.

Further, the ball 6 is inserted into the small-diameter recess 18 along the inner peripheral surface thereof so as to come into contact with and separate from the first valve seat 8. The movement of the ball 6 outward in the axial direction is caused by the small-diameter recess 18
It is regulated by a stopper 21 provided at the open end of the. The stopper 21 has an input port 22. Further, the inner peripheral surface of the small-diameter recess 18 has a slit 18A so that the fluid from the input port 22 can easily flow into the passage 19 when the ball 6 is separated from the first valve seat 8.

On the other hand, the plunger 4 of the solenoid body 2 has a through hole 41 penetratingly formed on the central axis, and a part of the rod 5 is inserted into the through hole 41.

As shown in FIG. 2, the rod 5 has a substantially cylindrical shape, and has a flange portion 51 that extends radially outward at a midway portion in the axial direction.
have. The diameter of this flange portion 51 is the plunger 4
Is larger than the diameter of the through hole 41. Further, a slit 52 is formed in the outer peripheral portion of the rod 5 so as to penetrate therethrough in the axial direction. In this embodiment, a plurality of them are provided at equal intervals. The numbers and positions are not limited to these.

The portion of the rod 5 that does not have the flange portion 51 is inserted into the through hole 41 of the plunger 4 so that the end surface of the flange portion 51 comes into contact with the end surface of the plunger 4. The flange portion 51 is located inside the tubular portion 16B of the center plate 16.

On the other hand, the portion on the opposite side which is not inserted into the through hole 41 extends so as to face the cylindrical portion 16B of the center plate 16 and the large-diameter recess 17 of the valve body 9, and the end portion thereof is the second portion. It is adapted to come into contact with and separate from the valve seat 7. Further, at the central portion of the end surface of the rod 5, the inside of the passage 19 is projected,
In order to separate the ball 6 from the first valve seat 8, that is, the passage 1
A convex portion 53 for opening 9 is integrally provided.

On the outer peripheral side of the rod 5, a coil spring 23 as a biasing means for biasing the plunger 4 in the direction of separating from the center plate 16 so as to separate the end portion of the rod 5 from the second valve seat 7. Is provided.
The biasing means is not limited to the coil spring 23, but may be any means provided on the outer peripheral portion of the rod 5 and having a biasing force.

One end of the coil spring 23 is in contact with the end surface of the flange portion 51 of the rod 5, and the other end is in contact with the valve body 9.
The plunger 4 is pressed against the bottom surface of the large-diameter concave portion 17 via the flange portion 51 of the rod 5 toward the closing portion 13 side opposite to the valve body 9. This is because the flange portion 51 of the rod 5 serves as a seat for the coil spring 23, and the urging force (load) of the coil spring 23 is transmitted to the plunger 4 via the flange portion 51.

Further, since the load of the coil spring 23 is applied to the flange portion 51 of the rod 5, the rod 5 is operatively connected to the plunger 4 via the flange portion 51.

On the other hand, the movement of the plunger 4 in the axial direction is restricted by the closing portion 13. Further, the drain port 2 as a second port penetratingly formed in the closing portion 13 in the axial direction.
Four.

The operation of the solenoid valve 1 having the above structure will be described.

When the coil 12 of the solenoid body 2 is not energized, the spring force of the coil spring 23 urges the plunger 4 toward the closed portion 13 side through the flange portion 51 of the rod 5. As a result, the end of the rod 5, which is operatively connected to the plunger 4 by the spring force of the coil spring 23, separates from the second valve seat 7, and the passage 19 and the drain port 24 are separated from each other by the slit 52 of the rod 5 and the plunger 4. It communicates via the through hole 41. Therefore, the slit 52 of the rod 5 serves as a flow path that connects the passage 19 and the drain port 24. The passage 19 and the output port 20 communicate with each other.

Further, since the end portion of the rod 5 is separated from the second valve seat 7, the convex portion 53 at the tip end portion of the rod 5 is retracted into the passage 19, and the convex portion 53 is formed in the ball 6. Will not work. Therefore, the ball 6 moves toward the first valve seat 8 side by the fluid pressure from the input port 22, contacts the first valve seat 8 and closes the passage 19, and the input port 22 and the passage 1
The flow with 9 will be closed.

From these, the fluid when the solenoid body 2 is not energized is the output port 20 → as shown by the arrow in FIG.
It flows from the passage 19 to the slit 52 of the rod 5 to the through hole 41 of the plunger 4 to the drain port 24.

Next, when the coil 12 of the solenoid body 2 is energized, the center plate 16 → the case 10 →
The plunger 4 is magnetically attracted to the center plate 16 against the spring force of the coil spring 23 by the magnetic circuit including the magnetic path from the side plate 15 to the plunger 4 to the center plate 16.

As a result, the end portion of the rod 5 has the second valve seat 7
To the second valve seat 7, the passage 19 is closed, and the passage 19 and the flow path including the slit 52 of the rod 5 and the drain port 24 are closed.

Further, since the end portion of the rod 5 contacts the second valve seat 7, the convex portion 53 at the tip end portion of the rod 5 has the passage 19
The ball 6 is pushed out further and the ball 6 is pushed. Therefore, the ball 6 separates from the first valve seat 8, and the input port 22 and the output port 20 communicate with each other via the passage 19.

From these, the fluid when the solenoid body 2 is energized flows from the input port 22 to the passage 19 to the output port 20.

In the solenoid valve having the above structure,
The flow path that connects the passage 19 that opens to the first valve seat 8 and the drain port 24 that is provided in the closing portion 13 is connected to the rod 5
Since the slit 53 is provided on the plunger 4, it is not necessary to provide the plunger 4. Therefore, since the plunger 4 is not processed, the plunger 4 can be easily manufactured. In addition, since the cross-sectional area of the magnetic path does not become small, the magnetic efficiency of the solenoid body 2 can be improved.

The rod 5 inserted into the through hole 41 of the plunger 4 has a flange portion 51 larger than the diameter of the through hole 41, and the flange portion 51 serves as a seat for the coil spring 23. Therefore, the plunger 4 and the rod 5 are operatively connected by the load of the coil spring 23 applied to the flange portion 51, without connecting the plunger 4 and the rod 5. For this reason, there is no need for a step for coupling as in the conventional technique, and thus the manufacturing of the entire device can be facilitated.

3 and 4 show another embodiment of the present invention. In the above-described embodiment, the ball 6 as the first valve body and the rod 5 as the second valve body are provided, and the valve body 9 is provided with the corresponding first valve seat 8 and second valve seat 7 in three directions. Although it is a valve, in this embodiment, the ball 6 and the first
The solenoid valve 1A is a two-way valve without the valve seat 8. The same components as those in the first embodiment will be described with the same reference numerals. Further, the components on the solenoid body side are the same as those in the first embodiment, so the same reference numerals are given in the drawings and the description thereof is omitted.

That is, the valve body 9A has only the recess 17A which is open on the solenoid body 2 side, and has the input port 22A as the first port penetratingly formed on the central axis at the bottom of the recess 17A.

The peripheral portion of the opening of the input port 22 of the recess 17A serves as the valve seat 7A, and the end of the rod 5A comes into contact with and separates from the valve seat 7A. That is, rod 5A
Is the valve body.

Since the rod 5A does not need to push the ball 6 as in the first embodiment, the end portion which comes in contact with and separates from the valve seat 7A does not have a convex portion as shown in FIG. It is a plane. The other parts have the same structure as the rod 5 of the first embodiment, and are designated by the same reference numerals in the drawings, and the description thereof is omitted.

Here, the solenoid valve 1A having the above structure
The operation of will be described.

When the coil 12 of the solenoid main body 2 is not energized, the spring force of the coil spring 23 urges the plunger 4 toward the closing portion 13 via the flange portion 51 of the rod 5A. As a result, the end of the rod 5A that is operatively connected to the plunger 4 by the spring force of the coil spring 23 separates from the valve seat 7A, and the input port 22A and the drain port 24 form the slit 52 of the rod 5A that forms the flow path. It communicates via the through hole 41 of the plunger 4.

From this, the fluid when the solenoid body 2 is not energized is the input port 22A → the slit 52 of the rod 5A → the through hole 41 of the plunger 4 → the drain port 24.
Flows to.

Next, when the coil 12 of the solenoid body 2 is energized, the center plate 16 → the case 10 →
The plunger 4 is magnetically attracted to the center plate 16 against the spring force of the coil spring 23 by the magnetic circuit including the magnetic path from the side plate 15 to the plunger 4 to the center plate 16. This allows the rod 5
The end of A moves to the valve seat 7A side, contacts the valve seat 7A, and closes the input port 22A.

Therefore, the fluid when the solenoid body 2 is energized does not flow to the drain port 24 side.

In the solenoid valve 1A of this construction, since the end of the rod 5A is not provided with a convex portion, the same effect as that of the first embodiment can be obtained.

[0071]

As described above, according to the present invention, the flow path that connects the first port opening to the valve seat and the second port provided on the opposite side of the valve seat of the movable member is formed. Since it is provided on the valve body, it is not necessary to provide a flow path on the movable member. Therefore, the movable member is not processed, and the manufacture of the movable member can be facilitated. In addition, since the cross-sectional area of the magnetic path does not become small, the magnetic efficiency of the solenoid body can be improved.

Further, it is assumed that the valve body is inserted into the through hole having the movable member, and the seat of the urging means for urging the movable member in a direction away from the fixed member is provided at an axially intermediate portion of the valve body. Since the valve body is provided, the valve body can transmit the load of the biasing means to the movable member by the seat of the biasing means. This allows
It is possible to operatively connect the movable member and the valve body by the load of the urging means applied to the seat of the urging means included in the valve body without connecting the movable member and the valve body. For this reason, there is no need for a step for coupling as in the conventional technique, and thus the manufacturing of the entire device can be facilitated.

[Brief description of drawings]

FIG. 1 is an overall sectional view of a solenoid valve according to an embodiment of the present invention.

2 (a) is a plan view of the rod of FIG. 1, and FIG. 2 (b) is a right side view of FIG. 2 (a).

FIG. 3 is an overall sectional view of a solenoid valve according to another embodiment of the present invention.

4 (a) is a plan view of the rod of FIG. 3, and FIG. 4 (b) is a right side view of FIG. 4 (a).

FIG. 5 is an overall sectional view of a conventional solenoid valve.

[Explanation of symbols]

 1, 1A Solenoid valve 2 Solenoid main body 3 Hollow part 4 Plunger (movable member) 41 Through hole 5 Rod (second valve body) 5A Rod (valve body) 51 Flange part (seat) 52 Slit (flow path) 53 Convex part 6 ball (first valve body) 7 second valve seat 7A valve seat 8 first valve seat 9, 9A valve body 10 case 11 bobbin 12 coil 13 blocking portion 14 sleeve 15 side plate 16 center plate (fixing member) 16A outward Flange part 16B Cylindrical part 16C Inward flange part 17 Large diameter recessed part 171 Outward flange part 17A Recessed part 18 Small diameter recessed part 18A Slit 19 Passage (1st port) 20 Output port 21 Stopper 22 Input port 22A Input port (1st port) 23 Coil spring (biasing means) 24 Drain port (second port)

Claims (2)

[Claims] 1. A movable member made of a magnetic material that is reciprocally inserted into a hollow interior of a hollow solenoid body, a valve body operatively connected to the movable member, and a valve seat with which the valve body comes into contact with and separates from the valve body. A fixed member made of a magnetic material provided on the valve seat side so as to face the movable member, a first port opening to the valve seat, and provided on the opposite side of the movable member to the valve seat. And a flow path that connects the second port and the first port to each other. When the movable member is magnetically attracted to the fixed member side by energizing the solenoid body, the valve is provided. A solenoid valve in which a body is in contact with the valve seat to close the first port, wherein the flow passage is provided in the valve body. 2. The solenoid valve according to claim 1, wherein a biasing means for biasing the movable member in a direction to separate from the fixed member to separate the valve body from the valve seat, and the valve body to the movable member in the axial direction. And a seat of the biasing means having a diameter larger than that of the through hole provided in an axially intermediate portion of the valve body, the solenoid being characterized in that the solenoid is inserted into the through hole. valve.