Patent ID: 6460347
Filing Date: 2002-10-08
Classification: F04B,F25B

Abstract:
A Stirling refrigeration machine having a compressor (1) and an expander (2), in which said compressor (1) comprises:a cylinder (4) fit into a casing (3); a piston (6) which is inserted into the cylinder (4) so as to be capable of reciprocating motion relative to the cylinder (4) and forms a compression room (7) between the piston (6) and the cylinder (4); resilient means (14) for resiliently supporting the piston (6) on the casing (3); and drive means (10) for driving the piston (6) into reciprocating motion relative to the cylinder (4), wherein the compression is communicated with the expander (2) through a connection pipe (9), and wherein the drive means (10) relatively reciprocates the piston (6) with respect to the cylinder (4) so that a compressed fluid generated in the compression room (7) is introduced into the expander (2) trough the connection pipe (9), the improvement characterized in that: the casing (3) has an insertion hole (3c) which penetrates the casing (3) and whose one end is open to the outer surface of the casing (3), while the cylinder (4) has an insertion hole (4e) which is communicated at one end with the insertion hole (3c) of the casing (3) and at the other end the compression room (7); a compressor (1) side joint end part of the connection pipe (9) is inserted into the insertion hole (3c) of the casing (3) and the insertion hole (4e) of the cylinder (4) to communicate an internal passage (9f) of the connection pipe (9) with the compression room (7); and sealing means (02, 28) are interposed between an end part of the connection pipe (9), which is connected to said compressor (1), and the insertion hole (4e) of the cylinder (4) to prevent a leakage of the fluid from a clearance between the casing (3) and the cylinder (4) into the casing (1).