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:
May. 28, 2002
Filed:
Oct. 30, 2000
Masafumi Nogawa, Toyota, JP;
Shin Kawano, Kariya, JP;
Shaowei Zhu, Kariya, JP;
Tatsuo Inoue, Anjo, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A pulse tube refrigerator which reduces valve losses in a cycle and improves refrigeration efficiency includes a pressure oscillator, a refrigerating portion, a first middle pressure buffer tank, a first middle pressure buffer side valve, a second middle pressure buffer tank and a second middle pressure buffer side valve. A regenerator in the refrigerating portion and an outlet port and an inlet port of a compressor in the pressure oscillator are connected via a high pressure valve and a low pressure valve respectively. A high temperature heat exchanger of the refrigerating portion and the first middle pressure buffer tank and the second middle pressure buffer tank are connected via the first middle pressure buffer side valve and the second middle pressure buffer side valve. The first middle pressure buffer tank and the second middle pressure buffer tank include different middle pressures which are predetermined between an output pressure and an input pressure of the compressor.