Capacity control valve

Patent metadata

Field	Value
Publication number	US-11867312-B2
Application number	US-202017600536-A
Country	US
Kind code	B2
Filing date	Apr 2, 2020
Priority date	Apr 4, 2019
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

In a capacity control valve, a position of a valve element is changed by drawing a movable iron core to a fixed iron core with magnetic force by energization of an electromagnetic coil. The iron core on one side includes a projected portion on the radially outer side, the iron core on the other side includes a projected portion on the radially inner side, and these projected portions are capable of being loosely fitted to each other when the movable iron core is drawn to the fixed iron core. The projected portion is formed to be smaller than an opposing surface of the iron core facing an effective magnetic force surface of a distal end of the projected portion and formed in a tapered shape.

First claim

The invention claimed is:

1. A capacity control valve in which a position of a valve element is changed by drawing a movable iron core to a fixed iron core with magnetic force generated in accordance with energization of an electromagnetic coil, wherein
one of the fixed iron core and the movable iron core includes a projected portion which is projected in an axial direction on a side of an outer peripheral surface of the one of the fixed core and the movable iron core,
remaining one of the fixed iron core and the movable iron core includes a projected portion which is projected in the axial direction on a side of an inner peripheral surface of the remaining one of the fixed core and the movable iron core,
the projected portions are capable of being loosely fitted to each other when the movable iron core is drawn to the fixed iron core,
the projected portion of the one of the fixed iron core and the movable iron core is formed in a tapered shape so as to have, as a distal end surface thereof, an effective magnetic force surface which is smaller than an opposing surface of the remaining one of the fixed iron core and the movable iron core, the opposing surface facing the effective magnetic force surface, and
the capacity control valve is of a normal open type to be brought into an opened state upon non-energization of the electromagnetic coil.

2. The capacity control valve according to claim 1 , wherein
the one of the fixed iron core and the movable iron core has a tilted surface forming the tapered shape of the projected portion thereof, and
the tilted surface is not parallel to an outer peripheral surface of the projected portion of the remaining one of the fixed iron core and the movable iron core.

3. The capacity control valve according to claim 1 , wherein
the outer peripheral surface of the projected portion of the remaining one of the fixed iron core and the movable iron core is parallel to the axial direction.

4. The capacity control valve according to claim 1 , wherein
the effective magnetic force surface of the one of the fixed iron core and the movable iron core and the opposing surface of the remaining one of the fixed iron core and the movable iron core are formed to be orthogonal to the axial direction.

5. The capacity control valve according to claim 1 , wherein
the one of the fixed iron core and the movable iron core has a tilted surface forming the tapered shape of the projected portion thereof, and
the tilted surface is formed so as to face an outer peripheral surface of the projected portion of the remaining one of the fixed iron core and the movable iron core.

6. The capacity control valve according to claim 1 , wherein
the one of the fixed iron core and the movable iron core has a tilted surface forming the tapered shape of the projected portion thereof, and
the tilted surface is formed on an outer peripheral side so as not to face an outer peripheral surface of the projected portion of the remaining one of the fixed iron core and the movable iron core.

7. A capacity control valve in which a position of a valve element is changed by drawing a movable iron core to a fixed iron core with magnetic force generated in accordance with energization of an electromagnetic coil, wherein
one of the fixed iron core and the movable iron core includes a projected portion which is projected in an axial direction on a side of an outer peripheral surface of the one of the fixed core and the movable iron core,
a remaining one of the fixed iron core and the movable iron core includes a projected portion which is projected in the axial direction on a side of an inner peripheral surface of the remaining one of the fixed core and the movable iron core,
the projected portions are capable of being loosely fitted to each other when the movable iron core is drawn to the fixed iron core,
the projected portion of the one of the fixed iron core and the movable iron core is formed in a tapered shape so as to have, as a distal end surface thereof, an effective magnetic force surface which is smaller than an opposing surface of the remaining one of the fixed iron core and the movable iron core, the opposing surface facing the effective magnetic force surface; and
the projected portion of the remaining one of the fixed iron core and the movable iron core is formed in a shape of equal width including a leading end surface which extends in a direction perpendicular to an axial direction and an outer peripheral surface which is continuous to the leading end surface and forms a surface parallel to the axial direction.

8. The capacity control valve according to claim 2 , wherein
the outer peripheral surface of the projected portion of the remaining one of the fixed iron core and the movable iron core is parallel to the axial direction.

9. The capacity control valve according to claim 2 , wherein
the effective magnetic force surface of the one of the fixed iron core and the movable iron core and the opposing surface of the remaining one of the fixed iron core and the movable iron core are formed to be orthogonal to the axial direction.

10. The capacity control valve according to claim 3 , wherein
the effective magnetic force surface of the one of the fixed iron core and the movable iron core and the opposing surface of the remaining one of the fixed iron core and the movable iron core are formed to be orthogonal to the axial direction.

Assignees

• Eagle Ind Co Ltd

Inventors

• Hayama Masahiro
• Fukudome Kohei
• Kanzaki Toshinori
• Takahashi Wataru
• Shirafuji Keigo

Classifications

• F16K31/0675 Primary

  Electromagnet aspects, e.g. electric supply therefor · CPC title

• F04B27/18 Primary

  by varying the relative positions of a swash plate and a cylinder block · CPC title

• G05D16/2022

  actuated by a proportional solenoid (throttling means G05D16/2024) · CPC title

• F16K15/148 Primary

  the closure elements being fixed in their centre · CPC title

• F16K31/0655

  Lift valves · CPC title