Abstract: For solving the problem of small refrigeration power of common pulse tube refrigerators (CPTR), a new concept is put forward of large diameter pulse tube refrigerator (LDPTR). Theoretical warranty analysis and experimental study both indicate that LDPTR can produce more refrigeration power than CPTR.

Key words: air cy cle r efr iger ation, Philips r efriger ato r, analy sis, ex per iment