JP2020148255A - solenoid valve - Google Patents

Abstract

To provide a solenoid valve capable of improving valve leakage resistance and increasing valve opening holding pressure without causing major modification, component addition, increase in machining and assembly costs, etc.SOLUTION: Since (a lower large-diameter valve body part 21 of) a valve body 20 is slidably arranged at least at a time when the valve body 20 is closed, specifically, over the entire stroke from a fully open state of the valve body 20 to a valve closing state, and a valve body guide part 51 for guiding the movement (elevation) of the valve body 20 is provided, (the lower large-diameter valve body part 21 of) the valve body 20 slidably contacts the valve body guide part 51 even in the vicinity of the valve closing, thereby stabilizing the operation of the valve body 20.SELECTED DRAWING: Figure 1

Description

The present invention relates to a solenoid valve, and more particularly to a solenoid valve having excellent valve leakage property.

Conventionally, a solenoid valve that opens and closes by raising and lowering a valve body with respect to a valve seat (valve seat) by the magnetic force of an electromagnetic coil is well known.

For example, Patent Documents 1 and 2 disclose a so-called energized closed type (normally open type) solenoid valve used as a dehumidifying valve (dry valve) for squeezing a refrigerant during dehumidifying (dry) operation of an air conditioner. ing.

The solenoid valve described in Patent Document 1 includes a tubular valve body having one end closed, a plunger slidably housed on one end side of the valve body, and a valve body so as to face the plunger. A suction element fitted in the central portion, a valve body penetrating the suction element and connected to the plunger, and a valve seat that closes the opening on the other end side of the valve body and is opened and closed by the valve body are formed. A coil spring (plunger spring) that is arranged between the valve seat member and the plunger and the suction element to urge the valve body to separate from the valve seat, and the valve body against the spring force of the coil spring. Is equipped with an electromagnetic coil that excites the attractor so as to close the valve seat.

Further, the solenoid valve described in Patent Document 2 has a tubular valve body having a small diameter portion and a large diameter portion connected to the small diameter portion via a step portion, and an open end having a large diameter portion on the outer peripheral edge portion. It has an annular valve seat member having a valve seat, which is joined to the portion, and a plunger slidably fitted to a small diameter portion, and the valve seat protrudes from the plunger so as to face the valve seat. A valve body that can be opened and closed, an annular spring receiver that is fixed to the step of the valve body, and a compression spring that is interposed between the spring receiver and the plunger and urges the valve body to separate from the valve seat ( It has a plunger spring), an aspirator fitted to the valve body so as to close the opening of the small diameter portion, and an electromagnetic coil that drives the valve body toward the valve seat side against the spring force of the compression spring.

Japanese Unexamined Patent Publication No. 2004-92664 JP-A-2007-56954

By the way, in the above-mentioned conventional solenoid valve, the plunger and the valve body are connected by caulking or the like, and the valve body is guided by a plunger that is slidably accommodated or fitted in the valve body. There is. That is, since the valve body is (indirectly) guided via the plunger, the tip of the valve body that comes into contact with (seats) the valve seat may swing, causing valve leakage.

Further, in the one described in Patent Document 1, a plunger is slidably housed on one end side of the valve body, and a valve sheet that is brought in, separated from and opened / closed by the valve body is provided on the other end side of the valve body. .. Therefore, the portion of the valve body that is guided by the plunger and the portion that comes into contact with the valve seat (seating) are located apart from each other, and the tip of the valve body that comes into contact with the valve seat (seating) becomes more oscillating. There is a concern that the leakability will worsen. Further, in this case, as described in Patent Document 1, the valve body can be guided to some extent by the suction element fixed to the central portion of the valve body (that is, between the plunger and the valve seat), but usually, suction is performed. Since a predetermined gap is provided between the child and the valve body, it is difficult to reliably suppress valve leakage.

Further, in the case described in Patent Document 2, the annular spring receiver fixed to the valve body is provided with a tubular guide portion that projects toward the valve seat side and guides the movement of the valve body, thereby moving. It is possible to suppress the unstable operation of the valve body that may occur at times. However, in the countermeasure described in Patent Document 2, it is necessary to separately provide an annular spring receiver provided with a guide portion, and this guide portion surrounds the tip portion of the valve body in the valve open state. It is formed, and when the valve is closed, the valve body comes out of the guide portion and the movement of the valve body is not guided, which is not sufficient for ensuring valve leakage.

Further, in the above-mentioned conventional solenoid valve, the valve body near the valve closing (that is, close to the valve seat) is drawn to the outlet side (low pressure side) due to the pressure difference between the inlet side and the outlet side. There is also the problem that it becomes easier to close the valve.

The present invention has been made in view of the above circumstances, and an object of the present invention is to improve valve leakage without causing major modification, addition of parts, increase in processing / assembly cost, or the like. Moreover, it is an object of the present invention to provide a solenoid valve capable of increasing the valve opening holding pressure.

In order to solve the above-mentioned problems, the solenoid valve according to the present invention basically has a valve body having a valve seat, a plunger arranged so as to be able to move up and down the valve body, and suction arranged to face the plunger. A child, an electromagnetic coil that excites the attractor, a valve body that is connected to the plunger and is arranged so as to be able to move up and down with respect to the valve seat, and the plunger in either the valve opening direction or the valve closing direction. The plunger is provided with an urging member for urging, and the plunger is moved in either the valve opening direction or the valve closing direction against the urging force of the urging member by energization of the electromagnetic coil, and at least the said When the valve body is closed, the valve body is slidably arranged to provide a valve body guide portion for guiding the movement of the valve body.

In a preferred embodiment, the valve body guide portion is arranged so that the valve body is slidably arranged over the entire stroke from the fully open to the closed valve of the valve body to guide the raising and lowering of the valve body. ..

In another preferred embodiment, the valve body guide portion has a tubular shape surrounding the outer periphery of the valve body, and the valve body is slidably inserted into the valve body guide portion.

In another preferred embodiment, the plunger is slidably fitted and inserted on one end side of the suction element in the valve body, and the valve seat is provided on the other end side of the suction element in the valve body. One end of the valve body is connected, the other end of the valve body is brought into contact with the valve seat, and the valve body guide portion is provided between the suction element and the valve seat.

In a more preferred embodiment, the valve body guide portion is provided on the valve seat side of the suction element or the suction element in the valve body.

In a more preferred embodiment, the valve body guide portion is formed in a tubular shape on the lower surface of the suction element.

In a more preferred embodiment, the lower end of the valve body guide portion is set at the same position as the lower end portion of the valve body when the valve body is fully opened.

In a more preferred embodiment, the lower end of the valve body guide portion is positioned below the upper end of the opening provided on the side portion of the valve body.

In a more preferred embodiment, the valve body is formed with a sliding portion having a diameter larger than the diameter of the valve seat and sliding in contact with the valve body guide portion.

In the electromagnetic valve of the present invention, at least when the valve body is closed, the valve body is slidably arranged over the entire stroke from the fully open to the closed valve body to guide the movement of the valve body. Since the body guide portion is provided, the valve body is slidably contacted with the valve body guide portion even in the vicinity of the valve closing (in other words, the valve body does not come out of the valve body guide portion) and the valve body operates. Stabilize. Therefore, for example, even when it is used horizontally (sideways), the valve leakage property can be reliably improved.

In this case, since the valve body guide portion can be formed by using a suction element fixed to the valve body or a part of the valve body (cylinder body portion), major modifications, addition of parts, increase in processing / assembly cost, etc. are required. I won't invite you.

Further, since the valve body guide portion has a tubular shape surrounding the outer periphery of the valve body and the valve body is slidably inserted into the valve body guide portion, the valve body guide portion is arranged inside the valve body guide portion. The pressure difference between the inlet side and the outlet side is less likely to act on the valve body. Therefore, the valve body is less likely to be drawn into the outlet side (low pressure side), and the valve opening holding pressure can be increased.

The vertical sectional view which shows the non-energized state (fully open state) of the 1st Embodiment of the solenoid valve which concerns on this invention. The vertical sectional view which shows the energization on (the valve closed state) of the 1st Embodiment of the solenoid valve which concerns on this invention. The vertical sectional view which shows the non-energized state (fully open state) of the 2nd Embodiment of the solenoid valve which concerns on this invention. The vertical sectional view which shows the energization on (the valve closed state) of the 2nd Embodiment of the solenoid valve which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
1 and 2 are vertical cross-sectional views showing a first embodiment of the solenoid valve according to the present invention, FIG. 1 shows a non-energized state (fully open state), and FIG. 2 shows an energized on state (valve closed state). ing.

In addition, in this specification, the description indicating the position and direction such as up and down, left and right, etc. is added for convenience according to the drawing in order to avoid complicated explanation, and the position and direction in the actually used state. Does not always point to.

Further, in each drawing, the gap formed between the members, the separation distance between the members, etc. are larger than the dimensions of each constituent member in order to facilitate understanding of the invention and for convenience in drawing. Or it may be drawn small.

The solenoid valve 1 of the illustrated embodiment is used for a refrigerating cycle of an air conditioner or the like, and is located at a lower portion of the small diameter portion 12A via a cylindrical small diameter portion 12A with a ceiling portion 12a and an annular step portion 12C. A valve is formed by a stepped can 12 composed of a series of large diameter portions 12B and a cylindrical valve seat member 14 with a flange-shaped portion 14C that is fitted into the large diameter portion 12B of the can 12 from below and sealed and joined by welding or the like. The main body 10 is configured. The upper end portion (inner peripheral side) of the valve seat member 14 is a valve seat 15 having an inverted conical tapered surface, and the valve seat 15 has a lower large-diameter valve body portion of the valve body 20 described later. 21 (specifically, an inverted conical tapered surface provided on the outer peripheral side of the lower end thereof) is brought into contact with and separated from each other.

Further, a conduit (joint) 41 is provided on one side of the large diameter portion 12B of the can 12, and a conduit (joint) 42 is attached to the lower portion (lower large diameter portion) of the valve seat member 14, respectively. It is joined and connected by.

Further, in this example, in the valve closed state (when the lower large-diameter valve body portion 21 comes into contact with the valve seat 15), the refrigerant is squeezed and led out from the conduit 41 to the conduit 42, that is, dehumidified in the air conditioner ( A bleed groove (a bleed groove) having a predetermined depth and a predetermined width at a plurality of locations (three locations at 120 ° intervals in the illustrated example) of the valve seat 15 as a refrigerant derivation throttle portion during a dry operation. 16 (also referred to as a diaphragm groove) is formed.

A suction element 26, which is a fixed iron core, is fixed to the lower portion of the small diameter portion 12A of the can 12 by caulking, fixing, brazing, or the like. The valve chamber 11 is defined by the suction element 26, the large diameter portion 12B of the can 12, and the valve seat member 14, and the lower large diameter valve body portion 21 of the valve body 20 described later is positioned in the valve chamber 11. ing. On the other hand, a bottomed cylindrical plunger 27 is slidably fitted (in the elevating direction (axis O direction)) on the upper portion of the small diameter portion 12A of the can 12 so as to face the suction element 26. .. The ceiling portion 12a of the small diameter portion 12A of the can 12 is a stopper that determines the upward movement limit (upper end position) of the plunger 27 by the urging force of the plunger spring 28 described later.

Further, in this example, the valve body 20 is arranged so as to penetrate the suction element 26 so as to be able to move up and down with respect to the valve seat 15 of the valve seat member 14 provided under the suction child 26. At the same time, it is connected to the plunger 27 provided on the upper side of the suction element 26 (relatively immovably immovable), and is always urged upward (valve opening direction) together with the plunger 27.

Specifically, the valve body 20 has a lower large-diameter valve body portion 21, a relatively long intermediate body portion 22 (in the vertical direction), and an upper small-diameter connecting portion 23 from the lower side. The lower large-diameter valve body portion 21 is arranged so as to be able to move up and down in the valve chamber 11 so as to be in contact with and detached from the valve seat 15 of the valve seat member 14, and the intermediate body portion 22 is provided on the suction element 26. It is inserted (interpolated) into the through hole 26a (which can move relative to the elevating direction with a slight gap), and the upper small diameter connecting portion 23 is fitted into the connecting hole 27a provided at the bottom of the plunger 27. It is connected and fixed (in the illustrated example, it is caulked and fixed by the caulking portion 23a). Here, the hole diameter (inner diameter) of the through hole 26a of the suction element 26 is smaller than the inner diameter (caliber) of the valve seat 15 of the valve seat member 14.

A plunger spring (biasing member) 28 made of a compression coil spring is interposed (reduced) between the plunger 27 and the suction element 26 (and the outer periphery of the intermediate body portion 22), and the plunger spring 28 Always urges the plunger 27 upward (in the direction of pulling it away from the suction element 26), that is, in the valve opening direction of pulling the lower large-diameter valve body portion 21 of the valve body 20 away from the valve seat 15 of the valve seat member 14.

A housing 32 constituting the electromagnetic coil 30, a coil 33 for energizing, a bobbin 34, and the like are attached to the outer peripheral side of the can 12 (small diameter portion 12A). A stopper 35 having a hemispherical convex portion is fixed to the upper portion of the housing 32, and a hemispherical concave portion in which the hemispherical convex portion of the stopper 35 is provided at a plurality of locations (for example, four locations) on the can 12 side. The electromagnetic coil 30 (housing 32, coil 33, etc.) is positioned and fixed to the can 12 by fitting it in any of the above.

Further, in addition to the above configuration, in the solenoid valve 1 of the present embodiment, the following measures are taken in order to directly and always directly guide the movement (elevation) of the valve body 20.

That is, in the present embodiment, a cylindrical valve body guide portion 51 is provided on the outer peripheral portion of the lower surface 26b (the surface facing the valve chamber 11 and the valve seat 15) of the suction element 26 (downward elevating direction (axis O direction)). It is formed integrally (along with). The inner diameter of the valve body guide portion 51 is slightly larger than the inner diameter (diameter) of the valve seat 15 of the valve seat member 14, and has a cylindrical shape that surrounds the outer periphery of the lower large-diameter valve body portion 21 of the valve body 20. The lower large-diameter valve body portion 21 of the valve body 20 that is in contact with and separated from the valve seat 15 of the valve seat member 14 is slidably arranged (inside) on the cylindrical valve body guide portion 51 (inside). It has been inserted).

More specifically, as can be clearly seen with reference to FIGS. 1 and 2, the lower large-diameter valve body portion 21 of the valve body 20 has the plunger 27 and the valve body 20 from the upper end position (fully open) to the lower end position (valve closed). ) Is slidably inserted into the cylindrical valve body guide portion 51 over the entire stroke up to). Further, as can be clearly seen with reference to FIG. 1, the lower end (position) of the valve body guide portion 51 is the valve body 20 (lower large diameter valve) when the plunger 27 and the valve body 20 are in the upper end position (fully open). It is set at the same position as the lower end of the body 21). Further, in the illustrated example, the lower end (position) of the valve body guide portion 51 is from the upper end of the conduit 41 (here, the opening serving as the inflow port) provided (sideways) on the side portion of the large diameter portion 12B of the can 12. It is located on the lower side.

The lower large-diameter valve body 21 of the valve body 20 is slidably inserted into the valve body guide portion 51 (inside), so that when the valve body 20 is closed (the lower large-diameter valve body 21 is a valve). The lower large-diameter valve body portion 21 (outer circumference) of the valve body 20 is always slidably contacted with the valve body guide portion 51 (inner circumference) over the entire stroke including (when abutting (seating) on the seat 15). The movement (elevation) of the valve body 20 is always guided.

In the solenoid valve 1 having such a configuration, when the coil 33 is not energized (when not energized), as shown in FIG. 1, the plunger 27 and the valve body 20 are affected by the urging force of the plunger spring 28. It is located at the upper end position (the position where the plunger 27 abuts on the ceiling portion 12a of the can 12), and the lower large-diameter valve body portion 21 of the valve body 20 is separated from the valve seat 15 of the valve seat member 14. Therefore, the refrigerant can freely flow between the conduits 41 and 42 via the valve chamber 11 (here, as shown by the arrow in the figure, the flow of the conduit 41 → the conduit 42 is the basis).

From the state shown in FIG. 1, when the coil 33 is energized (when energization is on), the attractor 26 and the plunger 27 are magnetized by the magnetic field generated from the coil 33, and the plunger 27 resists the urging force of the plunger spring 28. It is attracted to the suction element 26 side (downward (valve closing direction)). At the same time, the valve body 20 descends (integrates) with the plunger 27 (moves in the valve closing direction), and the lower large-diameter valve body portion 21 of the valve body 20 comes into contact with the valve seat 15 of the valve seat member 14. The lowering of the valve body 20 is prevented and the valve is closed (the state shown in FIG. 2). Therefore, the plunger 27 and the valve body 20 are in the lower end position, and the refrigerant flows through the bleed groove 16 provided in the valve seat 15 (here, as shown by the arrow in the figure, the conduit 41 → the conduit 42. It is based on the flow).

When the valve body 20 is lowered, the lower large-diameter valve body portion 21 (outer circumference) of the valve body 20 is always in sliding contact with the valve body guide portion 51 (inner circumference) projecting from the lower surface 26b of the suction element 26. Since the valve body 20 is guided to descend, the lower large-diameter valve body portion 21 of the valve body 20 is precisely brought into contact (seat) with the valve seat 15 of the valve seat member 14.

When the energization of the coil 33 is turned off from the state shown in FIG. 2 (when the energization is off), the plunger 27 and the valve body 20 are raised (moved in the valve opening direction) by the urging force of the plunger spring 28. The plunger 27 and the valve body 20 take the upper end position, but also at this time, the lower large-diameter valve body portion 21 (outer circumference) of the valve body 20 is projected from the lower surface 26b of the suction element 26. The valve body guide portion 51 (inner circumference) is always in sliding contact with the valve body guide portion 51 (inner circumference), and the ascending of the valve body 20 is guided.

As described above, in the solenoid valve 1 of the present embodiment, at least when the valve body 20 is closed, specifically, over the entire stroke from the fully open to the closed valve of the valve body 20, the valve body 20 (lower large diameter) Since the valve body portion 21) is slidably arranged and the valve body guide portion 51 for guiding the movement (elevation) of the valve body 20 is provided, the valve body 20 (lower large diameter) is provided even in the vicinity of the valve closing. The valve body portion 21) is slidably contacted with the valve body guide portion 51 (in other words, the valve body 20 (lower large-diameter valve body portion 21) does not come out of the valve body guide portion 51) of the valve body 20. The operation is stable. Therefore, for example, even when it is used horizontally (sideways), the valve leakage property can be reliably improved.

In this case, since the valve body guide portion 51 can be formed by using the suction element 26 fixed to the valve body 10 (can 12), it does not cause major modification, addition of parts, increase in processing / assembly cost, or the like. ..

Further, the valve body guide portion 51 has a cylindrical shape that surrounds the outer periphery of the valve body 20 (lower large-diameter valve body portion 21), and the valve body 20 (lower part) is formed on the valve body guide portion 51 (inside). Since the large-diameter valve body portion 21) is slidably inserted, the valve body 20 (lower large-diameter valve body portion 21) arranged inside the valve body guide portion 51 has an inflow port side and a flow. The pressure difference on the outlet side is less likely to act. Therefore, the valve body 20 is less likely to be drawn into the outlet side (low pressure side), and the valve opening holding pressure can be increased.

More specifically, in the present embodiment, in the valve chamber 11, the minimum opening is formed on the valve body guide 51 side surrounding the outer periphery of the valve body 20 (lower large-diameter valve body portion 21). Since pressure loss occurs on the suction element 26 side provided with the valve body guide 51, pressure loss (corresponding to the pressure difference between the inflow port side and the outflow port side) is generated in the valve body 20 (lower large-diameter valve body portion 21). As described above, the valve body 20 is less likely to be drawn into the outlet side (low pressure side) because it is less likely to act.

[Second Embodiment]
3 and 4 are vertical cross-sectional views showing a second embodiment of the solenoid valve according to the present invention, FIG. 3 shows a non-energized state (fully open state), and FIG. 4 shows an energized on state (valve closed state). ing.

The solenoid valve 2 of the second embodiment shown in the figure differs from the solenoid valve 1 of the first embodiment described above mainly in a configuration that directly guides the valve body 20 (that is, the attractor 26 and the valve seat 15). The other configuration is basically the same as that of the solenoid valve 1 of the first embodiment, except for the portion between the two. Therefore, the parts corresponding to the respective parts of the solenoid valve 1 of the first embodiment are designated by a common reference numeral to omit the duplicate description, and the differences will be mainly described below.

In the solenoid valve 2 of the present embodiment, as compared with the first embodiment described above, the small diameter portion 12A (the portion where the attractor 26 and the like are arranged) of the can 12 constituting the valve body 10 is on the lower side (valve sheet 15). It is lengthened to the side).

Further, the lower large-diameter valve body 21 (and the valve seat 14) is located above the lower large-diameter valve body 21 (in other words, between the lower large-diameter valve body 21 and the intermediate body 22) in the valve body 20. A sliding portion 25 having a diameter larger than that of the above diameter and having a predetermined length in the elevating direction (axis O direction) is formed. The sliding portion 25 slides on the valve body guide portion 52 (inside) formed of a tubular portion extending below the suction element 26 (valve seat 15 side) in the small diameter portion 12A of the can 12 described above. It is distributed (interpolated) as possible.

Also in the second embodiment, as in the first embodiment described above, the sliding portion 25 provided on the valve body 20 extends from the upper end position (fully open) to the lower end position (valve closed) of the plunger 27 and the valve body 20. It is slidably inserted into the cylindrical valve body guide portion 52 over the entire stroke of the above. As a result, the sliding portion 25 (outer circumference) of the valve body 20 is exposed over the entire stroke including when the valve body 20 is closed (when the lower large-diameter valve body portion 21 abuts (seats) on the valve seat 15). The valve body guide portion 52 (inner circumference) is always slid and contacted, so that the movement (elevation) of the valve body 20 is always guided.

Therefore, the solenoid valve 2 of the second embodiment also has substantially the same action and effect as the solenoid valve 1 of the first embodiment described above. In addition, in the solenoid valve 2 of the second embodiment, the valve body 10 (can 12) is lengthened to form the valve body guide portion 52, and a part of the valve body 20 is enlarged to form the valve body. Since it is only necessary to form the sliding portion 25 that is in sliding contact with the guide portion 52, it is easier to process and manufacture as compared with the first embodiment, which involves changing the shape of the suction element 26 made of a cut product made of a magnetic material, for example. Therefore, the processing and manufacturing costs can be reduced.

In the above embodiment, the bleed groove 16 is provided on the valve seat 15 side of the valve seat member 14, but it may be provided on the lower large diameter valve body portion 21 side of the valve body 20 or the valve seat 15. Of course, it may be provided on both of the lower large-diameter valve body portions 21. Further, it is natural that the bleed groove 16 can be omitted.

Further, in the above embodiment, the energized closed type (normally open type) solenoid valve has been described, but in the present invention, a plunger spring is installed as an urging member for urging the plunger 27 in the valve closing direction, and an electromagnetic coil is provided. The valve closes when the (coil) is not energized, and the plunger is moved in the valve opening direction to open the valve against the urging force of the plunger spring as the urging member when the electromagnetic coil (coil) is energized. Of course, it can also be applied to the type (normally closed type).

1 Solenoid valve (first embodiment)
2 Solenoid valve (second embodiment)
10 Valve body 11 Valve chamber 12 Can 12A Small diameter part 12a Ceiling part 12B Large diameter part 12C Step part 14 Valve seat member 14C Collar 15 Valve seat (valve seat)
16 Bleed groove 20 Valve body 21 Lower large diameter valve body part 22 Intermediate body part 23 Upper small diameter connecting part 23a Caulking part 25 Sliding part (second embodiment)
26 Attractor 26a Through hole 26b Bottom surface 27 Plunger 27a Connecting hole 28 Plunger spring (biasing member)
30 Electromagnetic coil 32 Housing 33 Coil 34 Bobbin 35 Stopper 41, 42 Conduit 51 Valve body guide portion (first embodiment)
52 Valve body guide section (second embodiment)

Claims (9)

A valve body with a valve seat and
A plunger that can be raised and lowered on the valve body,
With the aspirator placed opposite to the plunger,
An electromagnetic coil that excites the attractor and
A valve body connected to the plunger and arranged so as to be able to move up and down with respect to the valve seat.
An urging member that urges the plunger in either the valve opening direction or the valve closing direction is provided.
A solenoid valve in which the plunger is moved in either the valve opening direction or the valve closing direction against the urging force of the urging member by energization of the solenoid coil.
A solenoid valve characterized in that, at least when the valve body is closed, the valve body is slidably arranged to provide a valve body guide portion for guiding the movement of the valve body. The valve body guide portion is characterized in that the valve body is slidably arranged over the entire stroke from the fully open to the closed valve body to guide the ascending / descending of the valve body. The solenoid valve according to claim 1. The first or second claim, wherein the valve body guide portion has a tubular shape surrounding the outer periphery of the valve body, and the valve body is slidably inserted into the valve body guide portion. The solenoid valve described. The plunger is slidably fitted and inserted into one end side of the suction element in the valve body, the valve seat is provided on the other end side of the suction element in the valve body, and one end of the valve body is attached to the plunger. Connected so that the other end of the valve body is brought into contact with the valve seat.
The solenoid valve according to any one of claims 1 to 3, wherein the valve body guide portion is provided between the suction element and the valve seat. The solenoid valve according to claim 4, wherein the valve body guide portion is provided on the valve seat side of the attractor or the suction element in the valve body. The solenoid valve according to claim 5, wherein the valve body guide portion is formed in a tubular shape on the lower surface of the attractor. The solenoid valve according to claim 6, wherein the lower end of the valve body guide portion is set at the same position as the lower end portion of the valve body when the valve body is fully opened. The solenoid valve according to claim 6 or 7, wherein the lower end of the valve body guide portion is positioned below the upper end of the opening provided on the side portion of the valve body. The solenoid valve according to claim 5, wherein the valve body has a diameter larger than the diameter of the valve seat and is formed with a sliding portion that is in sliding contact with the valve body guide portion.

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