JP2018147985A - Electromagnetic coil and solenoid valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic coil of a solenoid valve using a coil member 10 in which a coil is sealed with a resin, a plunger case 13 and the like of a valve body 1 can be easily assembled to an electromagnetic coil 2, and the O ring 25 ensures the sealing property between an end face outer case 23 and the plunger case 13 and the like.SOLUTION: A seal member cover 24 is provided on a back side of a bottom plate portion 23b of the end face outer case 23. An O-ring 25 is mounted in an insertion hole 24a of the seal member cover 24. An O ring 25 is pressed against the outer periphery of a center hole 23d of the bottom plate portion 23b and the outer periphery of a case holder portion 11E at an upper end of the valve housing 11. A lead wire lead portion 2B1 is covered with a lead wire cover 24B.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electromagnetic coil in which an outer casing is mounted on the outer periphery of a coil member configured by sealing a cylindrical coil with a resin, and an electromagnetic valve including the electromagnetic coil.

  Conventionally, as an electromagnetic valve for controlling the flow of refrigerant in a refrigeration cycle system, for example, there is one disclosed in Japanese Patent No. 6059363 (Patent Document 1). This electromagnetic valve can assemble the assembly of an electromagnetic coil to a valve body by field work. In addition, this solenoid valve includes an O-ring inside the solenoid coil and on the outer periphery of the plunger case on the valve body side in order to prevent freezing inside the solenoid coil due to steam or the like in the atmosphere. Further, packing is provided at the boundary between the outer periphery of the plunger case and the outer box bottom of the electromagnetic coil.

Japanese Patent No. 6059363

  If an O-ring for preventing freezing is provided inside the electromagnetic coil as in a conventional electromagnetic coil, it is difficult to confirm the sealing performance by the O-ring unless the plunger case is inserted. In addition, when the packing is exposed outside the outer box, the appearance design is impaired.

  The present invention relates to an electromagnetic valve in which the assembly of the electromagnetic coil can be assembled to the valve body, the assembly of the electromagnetic coil can be easily assembled to the valve body, and a sealing property between the assembly of the electromagnetic coil and the valve body is ensured. The task is to do.

  The electromagnetic coil according to claim 1 includes a columnar coil member enclosing the coil in a resin portion, and an outer box that covers the outer periphery of the coil member, and the bottom of the outer box is energized to the electromagnetic coil. An electromagnetic coil having a center hole for inserting a valve body to be operated, wherein a ring-shaped seal member surrounding the periphery of the center hole is mounted, and a seal member formed with an insertion hole that matches the center hole The cover is provided at the bottom of the outer box.

  The electromagnetic coil according to claim 2 is the electromagnetic coil according to claim 1, wherein a lead wire lead-out portion from which a lead wire for energizing the coil is drawn out is provided on a part of the outer periphery of the coil member. The seal member cover also includes a lead wire cover that covers the lead wire lead-out portion.

  A solenoid valve according to a third aspect includes the electromagnetic coil according to the first or second aspect, and a valve main body that is inserted into the insertion hole of the seal member cover and the central hole of the outer casing. .

  According to the electromagnetic coil of claim 1 or 2, since the ring-shaped seal member is held by the seal member cover around the center hole at the bottom of the outer box, the plunger case of the valve body is covered with the seal member cover. The insertion hole and the center hole of the outer box can be easily inserted, the assembling work is easy, and the sealing property between the outer box and the plunger case can be secured by the seal member. Therefore, freezing inside the electromagnetic coil due to atmospheric vapor or the like can be prevented.

  According to the electromagnetic coil of the second aspect, in addition to the above effects, the lead wire lead-out portion of the coil member is covered by the lead wire cover, so that it is worn, chipped, cracked, etc. No damage will occur.

  According to the solenoid valve of claim 3, the same effect as that of claim 1 or 2 can be obtained.

It is a longitudinal cross-sectional view of the solenoid valve of embodiment of this invention. It is an external appearance side view of the solenoid valve of the embodiment of the present invention. It is a bottom perspective view of the electromagnetic coil in the electromagnetic valve of the embodiment of the present invention. It is a top perspective view of the electromagnetic coil in the solenoid valve of the embodiment of the present invention.

  Next, embodiments of the electromagnetic coil and the electromagnetic valve of the present invention will be described with reference to the drawings. 1 is a longitudinal sectional view of an electromagnetic valve according to an embodiment of the present invention, FIG. 2 is an external side view of the electromagnetic valve, FIG. 3 is a bottom perspective view of an electromagnetic coil in the electromagnetic valve, and FIG. 4 is an electromagnetic coil in the electromagnetic valve. FIG. Note that the concept of “upper and lower” in the following description corresponds to the upper and lower sides in the drawings of FIGS.

  The electromagnetic valve of this embodiment is a pilot type electromagnetic valve, and is composed of a valve body 1 and an electromagnetic coil 2. The valve main body 1 includes a metal valve housing 11, which includes a valve chamber 11A, a plunger chamber 11B, a guide hole 11C communicating with the valve chamber 11A and the plunger chamber 11B, and a main body. A valve port 11D is formed. In addition, a first joint pipe 11a connected to the valve chamber 11A is connected to one side of the outer periphery of the valve housing 11, and a second joint pipe 11b is connected to the lower end.

  A metal piston valve 12 is inserted into the guide hole 11C. The piston valve 12 is formed with a pilot valve chamber 12A that opens upward, and a pilot port 12B is formed at the bottom of the pilot valve chamber 12A. The piston valve 12 is disposed to face the main valve port 11D, and a valve opening spring 12c is compressed between the bottom of the valve chamber 11A and the piston valve 12. The piston valve 12 is biased in the direction away from the main valve port 11D (the valve opening direction) by the spring force of the valve opening spring 12c. A clearance is provided between the piston valve 12 and the guide hole 11C, and fluid from the first joint pipe 11a can flow into the plunger chamber 11B, which is the back space of the piston valve 22, via this clearance. ing.

  A cylindrical case holder portion 11E is formed at the upper end of the valve housing 11, and a plunger case 13 is attached in the case holder portion 11E. A plunger 14 is inserted in the plunger case 13. The plunger 14 is made of a magnetic material and is disposed in the plunger case 13 so as to be slidable in the direction of the axis L (vertical direction). Further, an attracting element 15 made of a magnetic material is fixed to the upper end of the plunger case 13, and a plunger spring 16 is disposed between the plunger 14 and the attracting element 15. A pilot valve 14 a made of a ball is caulked and fixed to the lower end portion of the plunger 14, and this pilot valve 14 a opens and closes the pilot port 12 B in the pilot valve chamber 12 A of the piston valve 12.

  The plunger case 13 and the attractor 15 are formed of an insertion hole 24a of a seal member cover 24, an O-ring 25 made of an elastic member such as rubber, a center hole 23d of an end surface outer box 23, and a coil member. The attractor 15 is screwed to the electromagnetic coil 2 by a screw N through a screw hole 23e of the end surface outer box 23. A sealing O-ring is fitted between the screw N and the top plate portion 23 a of the end surface outer box 23.

  With the above configuration, the solenoid valve of the embodiment is provided in the refrigeration cycle system, and the first joint pipe 11a is a primary side into which a high-pressure refrigerant flows, and the second joint pipe 11b is a secondary side from which the refrigerant flows out.

  When the electromagnetic coil 2 is not energized (when it is not energized), the state is as shown in FIG. 1, and the refrigerant does not flow. That is, no magnetic force is generated in the electromagnetic coil 2, and the plunger 14 is separated from the attractor 15 by the biasing force of the plunger spring 16 and the weight of the plunger 14. At this time, the pilot valve 14a closes the pilot port 12B. Further, the piston valve 12 is lowered together with the pilot valve 14a to close the main valve port 11D, and the refrigerant passage is blocked. At this time, the plunger chamber 11B, which is the back space of the piston valve 12, becomes a high pressure, and the valve closed state by the piston valve 12 is reliably maintained.

  When the electromagnetic coil 2 is energized, the magnetic force is transmitted to the attractor 15, the plunger 14 is raised, the pilot valve 14a at the lower end of the plunger 14 is separated from the pilot port 12B, and the pilot valve chamber 12A and the plunger chamber 11B are The two joint pipes 11b conduct and become low pressure. As a result, the piston valve 12 is separated from the main valve port 11D by the spring force of the valve opening spring 12c to be in the valve open state, and the refrigerant flows from the first joint pipe 11a to the second joint 11b.

  The electromagnetic coil 2 includes a coil member 21 in which a cylindrical coil 2A having an axis L as a central axis is sealed (encapsulated) with a resin material, a side outer case 22 fitted to the outer periphery of the coil member 21, An end face outer box 23 into which the box 22 is fitted, and a seal member cover 24 described later provided at the bottom of the end face outer box 23 are provided. The coil member 21 has a center hole 21a for inserting the plunger case 13 of the valve body 1 at the center thereof. The coil member 21 has a lead wire 2B connected to the coil 2A. As shown in FIG. 1, the lead wire 2B is drawn from the coil member 21 as a lead wire lead portion 2B1.

  The side outer box 22 is made of iron plate. The side outer box 22 has a shape that matches the outer periphery of the coil member 21, and includes two side plate portions 22a and 22a each forming a substantially semicircular arc surface, and a connecting portion 22b that connects both side plate portions 22a and 22a. Are integrally formed. Then, the side plate portions 22 a and 22 a act in the direction of pressing the side surface of the coil member 21 by the elastic force of the side surface outer case 22 itself, and the side surface outer case 22 is fitted in a state where the coil member 21 is sandwiched. Further, ear portions 22b1 are formed at both end portions of the connecting portion 22b of the side surface outer case 22.

  The end surface outer box 23 is made of an iron plate. The end surface outer box 23 is formed by integrally forming a top plate portion 23a and a bottom plate portion 23b that are parallel to each other, and a side surface portion 23c that connects the top plate portion 23a and the bottom plate portion 23b. A center hole 23d for inserting the plunger case 13 is formed in the bottom plate portion 23b, and a screw hole 23e for screwing the suction element 15 with a screw N is formed in the top plate portion 23a. The end surface outer box 23 is assembled to the side surface outer box 22 such that the top plate portion 23a and the bottom plate portion 23b cover both end surfaces of the coil member 21 and both end surfaces of the side surface outer box 22, respectively.

  The seal member cover 24 is formed by pressing or the like, and is arranged in parallel with the bottom plate portion 23b and has a substantially ring-shaped seal cover 24A centering on the axis L, a lead wire cover 24B that covers the lead wire lead-out portion 2B1, Ear portions 24C formed on both sides of the lead wire cover 24B are integrally formed. The seal cover 24A has an insertion hole 24a, and an O-ring 25 as a “seal member” is mounted therein. Then, the sealing member cover 24 is secured by the rivets 26 at both the ears 24C and 24C of the sealing member cover 24 and the both ears 22b1 and 22b1 of the connecting portion 22b of the side outer box 22, so that the sealing member cover 24 is secured to the side outer casing. 22 and the bottom plate portion 23 b of the end surface outer box 23.

  Accordingly, the O-ring 25 is disposed around the center hole 23d of the end surface outer box 23. Further, the lead wire cover 24B is in a state of covering the lead wire lead-out portion 2B1. When the valve body 1 (plunger case 13 and attractor 15) is assembled to the electromagnetic coil 2, the O-ring 25 is provided around the center hole 23d of the end surface outer casing 23 and the case holder at the upper end of the valve housing 11. The end of the case holder 11E and the center hole 23d are sealed from the outside by being pressed against the outer periphery of the portion 11E. Further, since the O-ring 25 is held by the seal member cover 24, it is easy to insert the plunger case 13 of the valve body 1 into the insertion hole 24a of the seal member cover 24 and the center hole 23d of the end surface outer box 23, and the assembly work Is easy. Further, the sealing performance between the end surface outer case 23 and the plunger case 13 can be secured by the O-ring 25. Therefore, freezing inside the electromagnetic coil due to atmospheric vapor or the like can be prevented.

  Further, the side outer box 22 and the end face outer box 23 cover substantially the entire circumference of the coil member 21, and the lead wire lead-out portion 2 B 1 of the coil member 21 is covered by the lead wire cover 24 B of the seal member cover 24. . Therefore, damage such as wear, chipping or cracking of the coil member 21 and the lead wire 2B of the lead wire lead-out portion 2B1 does not occur due to vibration or the impact of foreign matter. Further, since the end portion 22b2 of the connecting portion 22b to which the seal member cover 24 is attached is rounded by bending, the lead wire 2B is not damaged by the connecting portion 22b. Note that the end 22b2 only needs to have a shape that does not damage the lead wire 2B, and may be other shapes such as an R shape as well as those that are rounded by bending.

  Further, the side surface outer box 22, the end surface outer box 23, and the cover 24 of the embodiment are painted black with a paint (for example, cation), thereby increasing the heat dissipation effect of the coil member 21 and preventing the coil temperature from rising. It can be done. Such blackening treatment may be alumite treatment or the like when the seal member cover 24 is an aluminum part.

  In the embodiment, the seal member cover 24 of one component also has the lead wire cover 24B together with the seal cover 24A to which the O-ring 25 is attached. However, the seal cover 24A and the lead wire cover 24B are configured separately. May be. Further, the seal member cover 24 may be only the seal cover 24A to which the O-ring 25 is attached.

  In the embodiment, the example of the O-ring is described as the “seal member”, but the “seal member” may be a disk-shaped packing or the like.

  Further, in the embodiment, the “pilot type solenoid valve” including the valve opening spring 12c has been described as an example. However, the “pilot type solenoid valve” without the valve opening spring 12c, or the piston valve 12 and the valve opening spring 12c. There may be a “direct acting solenoid valve” with no.

  In addition, according to the electromagnetic coil of the above embodiment, since the substantially whole periphery of a coil member is covered with the outer casing, the effect which suppresses a fire spread is also acquired.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention.

1 valve body 11 valve housing 11A valve chamber 11B plunger chamber 11C guide hole 11D main valve port 11E case holder portion 11a first joint pipe 11b second joint pipe 12 piston valve 12A pilot valve chamber 12B pilot port 12c valve opening spring 13 plunge case 14 Plunger 14a Pilot valve 15 Suction element 16 Plunger spring 2 Electromagnetic coil 2A Coil 2B Lead wire 2B1 Lead wire lead-out portion 21 Coil member 21a Center hole 22 Side surface outer box 22a Side plate portion 22b Connection portion 22b1 Ear portion 23 End surface outer case 23a Top plate Portion 23b bottom plate portion 23c side surface portion 23d center hole 23e screw hole 24 seal member cover 24A seal cover 24B lead wire cover 24C ear portion 24a insertion hole 25 O-ring (seal member)
26 Rivet N Screw L Axis

Claims (3)

In order to insert a valve body that is actuated by energizing the electromagnetic coil into the bottom of the outer casing, including a columnar coil member that encloses the coil with a resin portion, and an outer box that covers the outer periphery of the coil member An electromagnetic coil having a central hole of
An electromagnetic seal characterized in that a ring-shaped seal member surrounding the periphery of the center hole is mounted, and a seal member cover having an insertion hole aligned with the center hole is provided at the bottom of the outer box. coil. A lead wire lead-out portion from which a lead wire for energizing the coil is drawn out on a part of the outer periphery of the coil member;
The electromagnetic coil according to claim 1, wherein the seal member cover also has a lead wire cover that covers the lead wire lead-out portion. An electromagnetic valve comprising: the electromagnetic coil according to claim 1; and a valve main body inserted into the insertion hole of the seal member cover and the central hole of the outer box.

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