The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2014
Filed:
Mar. 12, 2010
Zhihua Gan, Hangzhou, CN;
BO Wang, Hangzhou, CN;
Limin Qiu, Hangzhou, CN;
Longyi Wang, Hangzhou, CN;
Bingyan Fan, Hangzhou, CN;
Zhihua Gan, Hangzhou, CN;
Bo Wang, Hangzhou, CN;
Limin Qiu, Hangzhou, CN;
Longyi Wang, Hangzhou, CN;
Bingyan Fan, Hangzhou, CN;
Zhejiang University, Zhejiang Province, CN;
Abstract
A pulse tube cryocooler modulating phase via an inertance tube and an acoustic amplifier (A, A) provided in the pulse tube cryocooler are disclosed. The acoustic power amplifier (A, A) is made of a metal pulse tube (PT, PT) filled with regenerative materials, which are located at a distance of X from the hot end of the pulse tube. The length of the regenerative materials is L which meets the requirement of X−L>0. The acoustic power amplifier (A, A) can be used not only in a single-stage pulse tube cryocooler, but also in a multi-stage pulse tube cryocooler thermally coupled or gas coupled. The regenerative materials may be any cold storage materials applicable at low temperatures, such as stainless steel wire mesh, lead pellet, lead thread et al. The acoustic power amplifier (A, A) can increase the acoustic power at the hot end of the pulse tube (PT, PT), which is advantageous to the phase modulation of the inertance tube, thereby the properties of the pulse tube cryocooler can be enhanced.