WO2008062703A1

WO2008062703A1 - Solenoid

Info

Publication number: WO2008062703A1
Application number: PCT/JP2007/072153
Authority: WO
Inventors: Yukihiko Taguchi
Original assignee: Sanden Corporation
Priority date: 2006-11-21
Filing date: 2007-11-15
Publication date: 2008-05-29
Also published as: JP2008128364A

Abstract

[PROBLEMS] To provide a solenoid having a higher corrosion resistivity with a reduced cost, compared with conventional solenoids. [MEANS FOR SOLVING PROBLEMS] A solenoid is provided with a case member (101) composed of a magnetic body for storing a coil member (102) inside; a sleeve (103) arranged inside the coil member (102); a fixed iron core (104) and movable iron core (105) arranged inside the sleeve (103); a cylindrical member (108), which is arranged outside of a section in the vicinity of one end of the sleeve (103) in the diameter direction, connected to an one end section of the case member (101) and is composed of a magnetic body facing the fixed iron core (104) or the movable iron core (105); a seal member (109) arranged on the external circumference of the cylindrical member (108); and a resin member (110) which is adhered to the cylindrical member (108) to close the end section on a side separated from the case member (101) of the cylindrical member (108) and to cover the one end of the sleeve (103).

Description

Specification

solenoid

Technical field

The present invention relates to a solenoid used for a capacity control valve of a compressor.

Background art

[0002] A solenoid used for a capacity control valve of a compressor, comprising a case member made of a magnetic material that accommodates a coil member therein, a sleeve disposed inside the coil member, and disposed in the sleeve A fixed iron core and a movable iron core, a cylindrical member made of a magnetic material disposed radially outward near one end of the sleeve and joined to one end of the case member, and facing the fixed iron core; Patent Document 1 discloses a solenoid comprising a resin member that is in close contact with a cylindrical member and closes an end portion of the cylindrical member on the side where the case member force is separated, and covers one end of the sleeve.

Patent Document 1: Japanese Patent Laid-Open No. 2002-031052

Disclosure of the invention

Problems to be solved by the invention

[0003] In the solenoid of Patent Document 1, since the case member protrudes from the compressor housing and is exposed to the external environment, it is necessary to subject the case member to a highly corrosion-resistant surface treatment, resulting in an increase in manufacturing cost. There is a problem.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a solenoid that is superior in corrosion resistance and has a reduced manufacturing cost.

Means for solving the problem

[0004] In order to solve the above-mentioned problems, in the present invention, a case member made of a magnetic material that accommodates the coil member therein, a sleeve disposed inside the coil member, and a sleeve member are disposed in the sleeve. A fixed iron core, a movable iron core, a cylindrical member made of a magnetic material that is disposed radially outward near one end of the sleeve and is joined to one end of the case member, and is opposed to the fixed iron core or the movable iron core; A seal member disposed on the outer periphery of the cylindrical member, and a tree that is in close contact with the cylindrical member and closes the end of the cylindrical member that is separated from the case member and covers one end of the sleeve. A solenoid comprising a grease member is provided.

The tubular member is directed rearward in the traveling direction, the solenoid according to the present invention is inserted into the housing hole formed in the compressor housing, and the seal member disposed on the outer periphery of the tubular member is inserted into the housing hole opening. It presses against the peripheral wall of a part, and the clearance gap between a cylindrical member and the accommodation hole opening peripheral wall is sealed. The case member is shielded from the external environment, and the corrosion resistance of the solenoid is improved as compared with the conventional case. Since the corrosion-resistant surface treatment grade of the case member can be reduced compared to the conventional case, the manufacturing cost of the solenoid is reduced compared to the conventional case.

Since the resin member is in close contact with the cylindrical member and closes the end of the cylindrical member on the side where the case member force is separated and covers one end of the sleeve, water penetration into the solenoid is prevented, and the coil member Waterproofness is ensured.

[0005] In a preferred aspect of the present invention, the cylindrical member and the coil member are combined with the resin member by insert molding, and the outer peripheral surface of the cylindrical member is exposed from the resin. A seal member is accommodated in a circumferential groove formed on the surface.

By combining the cylindrical member and the coil member with the resin member by insert molding, the component configuration is simplified and the assembly of the solenoid is improved. The sealing member can be accommodated in the circumferential groove on the outer peripheral surface of the cylindrical member exposed from the resin, and the gap between the cylindrical member and the peripheral wall of the accommodation hole opening can be reliably sealed.

[0006] In a preferred embodiment of the present invention, the cylindrical member and the case member are made of an iron-based material, and each is subjected to a corrosion-resistant surface treatment, and the corrosion-resistant surface treatment of the case member is more than the corrosion-resistant surface treatment of the cylindrical member. Low grade.

Since the cylindrical member is exposed to the external environment, it is necessary to perform the same corrosion-resistant surface treatment as before. Since the case member is not exposed to the external environment, the corrosion-resistant surface treatment grade can be lowered compared to the cylindrical member, and thus compared to the conventional case. By reducing the corrosion-resistant surface treatment grade of the case member, the manufacturing cost of the solenoid is reduced compared to the conventional case.

[0007] In a preferred embodiment of the present invention, the cylindrical member is made of an electromagnetic stainless material.

By forming the cylindrical member from an electromagnetic stainless steel material, the corrosion-resistant surface treatment of the cylindrical member can be omitted, and the manufacturing cost of the solenoid is further reduced. The invention's effect

[0008] The cylindrical member is directed rearward in the traveling direction, the solenoid according to the present invention is inserted into an accommodation hole formed in the compressor housing, and the seal member disposed on the outer periphery of the cylindrical member is accommodated. Press against the peripheral wall of the hole opening to seal the gap between the tubular member and the peripheral hole opening peripheral wall. The case member is shielded from the external environment, and the corrosion resistance of the solenoid is improved as compared with the conventional case. Since the corrosion-resistant surface treatment grade of the case member can be reduced compared to the conventional case, the manufacturing cost of the solenoid is reduced compared to the conventional case.

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] An embodiment of the present invention will be described.

As shown in FIG. 1, the solenoid 100 of the capacity control valve includes a case member 101 made of an iron-based magnetic material having a cylindrical portion 101a and a bottom portion 101b, and a coil member 102 accommodated in the case member 101. A cylindrical sleeve 103 made of a non-magnetic material, which is disposed inside the coil member 102 and whose end on the open end 101c side of the case member 101 is closed, and a fixed iron core disposed in the sleeve 103 104, a movable iron core 105 disposed in the sleeve 103 and facing the fixed iron core 104 with a predetermined gap, a solenoid rod 106 fixed to the movable iron core 105 and inserted into the fixed iron core 104, and a solenoid rod A panel 107 that engages 106 and urges the movable iron core 105 in a direction away from the fixed iron core 104, and an open end 101c of the case member 101 that is disposed radially outward near the closed end of the sleeve 103. Caulked and fixed iron core 1 04 Movable core 105 A cylindrical member 108 made of an iron-based magnetic material facing the end on the side separated from the remote part, an O-ring 109 accommodated in a circumferential groove 108a on the outer periphery of the cylindrical member 108, and the cylindrical member 108 and A connector made of a resin material that is united with the coil member 102 and is tightly attached to the inner peripheral surface of the tubular member 108 to close the end of the tubular member 108 on the side away from the case member 101 and cover the closed end of the sleeve 103 110 and an electrical connection terminal 11 1 disposed in the connector 110.

The outer peripheral surface of the cylindrical member 108 and the peripheral groove 108a are exposed from the resin.

The cylindrical member 108 and the case member 101 are each subjected to a corrosion-resistant surface treatment. The corrosion resistant surface treatment of the case member 101 is of a lower grade than the corrosion resistant surface treatment of the tubular member 108. The movable iron core 105 is connected to a valve mechanism (not shown). In the solenoid 100, when the coil member 102 is energized, a magnetic circuit is formed by the case member 101, the cylindrical member 108, the fixed iron core 104, and the movable iron core 105, and the movable iron core resists the biasing force of the spring 107. 105 is sucked into the fixed iron core 104. When the energization of the coil member 102 is stopped, the magnetic circuit disappears, and the movable iron core 105 is separated from the fixed iron core 104 due to the biasing force of the panel 107. The operation of the valve mechanism connected to the movable iron core 105 is controlled by the operation of the solenoid.

[0011] When a capacity control valve including the solenoid 100 is attached to the compressor, the valve member and the solenoid 100 are inserted into the accommodation hole 201 formed in the compressor housing 200 by directing the tubular member 108 backward in the traveling direction. The O-ring 109 accommodated in the circumferential groove 108a on the outer periphery of the cylindrical member 108 is pressed against the peripheral wall of the opening of the receiving hole 201, and the gap between the cylindrical member 108 and the peripheral wall of the opening of the receiving hole 201 is pressed. Is sealed. Using the retaining ring 202, the valve mechanism and the solenoid 100 are fixed to the housing 200 of the compressor.

The solenoid 100 is inserted into the accommodation hole 201 except for the connector 110, and the O-ring 109 seals the gap between the tubular member 108 and the peripheral wall of the opening of the accommodation hole 201. Blocked from the external environment. As a result, the corrosion resistance of the solenoid 100 is improved compared to the conventional case.

Since the grade of the corrosion-resistant surface treatment of the case member 101 cut off from the external environment can be reduced as compared with the conventional case, the manufacturing cost of the solenoid 100 is reduced as compared with the conventional case.

Since the connector 110 is in close contact with the inner peripheral surface of the cylindrical member 108 and closes the end of the cylindrical member 108 that is separated from the case member, and covers the closed end of the sleeve 103, water enters the solenoid. Is prevented, and the waterproofness of the coil member 102 is ensured.

By forming the cylindrical member 108 and the coil member 102 by insert molding and combining them with the connector 110, the component configuration is simplified and the assembly of the solenoid 100 is improved. By accommodating the O-ring 109 in the circumferential groove 108a exposed from the resin on the outer peripheral surface of the cylindrical member 108 and subjected to a corrosion-resistant surface treatment, a gap between the cylindrical member 108 and the peripheral wall of the opening of the receiving hole 201 is ensured. Seal with a force S.

Since the cylindrical member 108 is exposed to the external environment, it is necessary to perform the same corrosion-resistant surface treatment as before. Since case member 101 is not exposed to the external environment, the corrosion-resistant surface treatment gray Compared to the cylindrical member 108, the door can be dropped compared to the conventional case. By reducing the grade of the corrosion-resistant surface treatment of the case member 101 as compared with the conventional case, the manufacturing cost of the solenoid 100 is reduced as compared with the conventional case.

[0013] The sleeve 103 may be formed of a magnetic material.

The cylindrical member 108 is not limited to a simple cylindrical body. For example, the cylindrical member 108 may have a bottom portion in which a resin injection hole is formed.

The cylindrical member 108 may be formed of an electromagnetic stainless material. Corrosion-resistant surface treatment of the cylindrical member 108 can be omitted, and the manufacturing cost of the solenoid 100 is further reduced.

The arrangement of the fixed iron core 104 and the movable iron core 105 may be exchanged so that the movable iron core 105 faces the cylindrical member 108.

As shown in FIG. 2, the connector 110 may be brought into close contact with the end surface of the cylindrical member 108 that is separated from the case member 101.

As shown in FIG. 2, a protrusion 112 may be formed on the connector 110 and engaged with a recess formed on the compressor housing 201. The electrical connection terminal 111 can be directed in a predetermined direction.

[0014] The present invention can be applied not only to a solenoid inserted into the compressor housing but also to all solenoids inserted into the housing.

An engagement portion (convex portion or concave portion) of a jig for taking out the solenoid mounted on the louver or the louver may be formed on the connector.

The corrosion resistant surface treatment of the cylindrical member 108 and the corrosion resistant surface treatment of the case member 101 may be different types of surface treatment.

It is desirable to use a resin material having good adhesion to the tubular member 108. In order to improve the adhesion between the two, an adhesive may be interposed between the two.

An accommodation groove for the O-ring 109 may be formed on the peripheral wall of the accommodation hole 201.

Instead of the connector 110 having the electrical connection terminal 111, a resin member that closely contacts the tubular member 108 and closes the end of the tubular member 108 that is separated from the case member 101 and covers the closed end of the sleeve 103 is used. You may comprise so that a lead wire may be pulled out.

Brief Description of Drawings 1] A sectional view of a solenoid according to an embodiment of the present invention.

2] A partial cross-sectional view of a solenoid according to another embodiment of the present invention. Explanation of symbols

100 solenoid

101 Case material

102 Coil member

103 sleeve

104 Fixed iron core

105 Movable iron core

108 Tubular member

109 o-ring

110 connector

Claims

The scope of the claims

[1] A case member made of a magnetic material that accommodates the coil member therein, a sleeve disposed inside the coil member, a fixed iron core and a movable iron core disposed in the sleeve, and a portion near one end of the sleeve. A cylindrical member that is disposed radially outward and is joined to one end of the case member and made of a magnetic material facing the fixed core or the movable core; and a seal member that is disposed on the outer periphery of the cylindrical member; And a resin member that closes an end portion of the tubular member that is in close contact with the tubular member and separates the case member force and covers one end of the sleeve.

[2] The cylindrical member and the coil member are combined with the resin member by insert molding, and the outer peripheral surface of the cylindrical member is exposed from the resin, and is sealed in the peripheral groove formed on the outer peripheral surface. 2. The solenoid according to claim 1, wherein the member is housed!

[3] The cylindrical member and the case member are made of an iron-based material and are each subjected to a corrosion-resistant surface treatment, and the corrosion-resistant surface treatment of the case member is lower grade than the corrosion-resistant surface treatment of the cylindrical member. The solenoid according to 1 or 2.

[4] The solenoid according to any one of [1] to [3], wherein the cylindrical member is made of an electromagnetic stainless steel material.