Patent ID: 7047749

Claim:
A pulse tube refrigerating apparatus comprising: a pulse tube having a room temperature end and a low temperature end; a regenerator having a room temperature end and a low temperature end; a phase control means for communicating with said room temperature end of said pulse tube so as to control pressure fluctuation and phase difference of working gas; a pressure control means communicating with said room temperature end of said regenerator, and having a compressor, a high pressure selector valve and a low pressure selector valve; and a flow path for working gas connecting said low temperature end of said pulse tube and said low temperature end of said regenerator with each other, wherein said flow path is simultaneously extending to said subject to be cooled, thereby carrying out heat transfer to said subject to be cooled, said apparatus adapted to have a room temperature gas introduced into the flow path so as to enable the heating period of the subject to be cooled to be reduced during the cooling and heating/regenerating.