Stirling refrigerating machine
AssigneeSharp Kabushiki Kaisha
InventorYoshiaki Ogura
Life of this patent
Estimating the term…
Abstract
A Stirling refrigerator has an outer yoke assembly (11) provided as an outer yoke constituting a linear motor (16) and has a piston-support-spring support member (14A) and a displacer-support-spring support member (14B) that are supported by the outer yoke assembly (11) for fixing a piston support spring (5) and a displacer support spring (6) respectively. By the above-described structure, it is achieved to facilitate handling, in assembly of mass production, of a bobbin/coil and an outer yoke of an outer yoke body constituting the linear motor and reduce the size of the outer shape of a casing.
Claims9
A Stirling refrigerator comprising:
- a casing (15);
- a cylinder (3) provided in said casing (15);
- a piston (1) provided in said cylinder (3) to be made movable in a reciprocating manner in the axial direction of said cylinder (3) by a linear motor (16) provided externally to said cylinder (3);
- and
- a displacer (2) provided in said cylinder (3) to form a compression space between itself and said piston (1) in said cylinder (3) and to be movable in a reciprocating manner in the axial direction,
- said linear motor (16) including
- an inner yoke (13) provided on an outer periphery of said cylinder (3),
- an outer yoke assembly (9) placed externally to said inner yoke (13) to face said inner yoke (13), and
- a permanent magnet (12) placed in a gap between said inner yoke (13) and said outer yoke assembly (9) and coupled to said piston (1), and
- said outer yoke assembly (9) including
- a bobbin/coil (9a) placed to face said inner yoke (13),
- an outer yoke (9b) provided to cover said bobbin/coil (9a) from said casing and in the axial direction, and
- a pair of ring-shaped holding members (10a, 10b) provided to hold said outer yoke (9b) therebetween in the axial direction.
Dependencies are inferred from the claim text.