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:
Feb. 25, 1997
Filed:
Jul. 03, 1996
Han-Jun Kim, Liverpool, NY (US);
In-Soo Hwang, Kyungki-do, KR;
Carrier Corporation, Syracuse, NY (US);
Abstract
The present invention concerns a noise reduction method and a noise reduction device for a hermetic rotary compressor. It is designed to reduce the very high level of low frequency sound generated by the compressor by preventing the formation of reflected waves along the circumference which produce the resonant sound mode, and thus by preventing the amplification of the low frequency gas pulsations. In the present invention, the amplitude of the reflected waves that form the resonant sound mode is reduced by installing the muffler outlets at one half the wavelength of the reflected waves in the cavity of the compressor housing from the exhaust valve where the compressed gas from the cylinder enters the muffler. By positioning these outlets to face each other so that, of the pulsating gas components form these two outlets, those at the frequency of the reflected waves formed in the circumferential direction of the cavity of the compressor housing will undergo a 180.degree. phase shift and destructively interfere with each other.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile