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:
Jul. 17, 2001
Filed:
Apr. 21, 2000
Shunichi Furuya, Higashimatsuyama, JP;
Hiroshi Kanai, Konan, JP;
Zexel Corporation, Tokyo, JP;
Abstract
In a freezing cycle that utilizes a supercritical fluid as its coolant and employs an internal heat exchanger that performs heat exchange on the coolant on the outlet side of a gas cooler and on the intake side of a compressor, a means for adjustment that adjusts the quantity of heat exchange performed by the internal heat exchanger (,) is provided. The means for adjustment is constituted of a bypass passage (,) that bypasses the internal heat exchanger (,) and a flow-regulating valve (,) that adjusts the coolant flow rate in the bypass passage (,). The flow-regulating valve (,) is constituted of an electromagnetic valve, the degree of openness of which is determined based upon information with respect to the cycle state, or a bellows regulating valve that operates in correspondence to the pressure on the high-pressure side. Alternatively, the means for adjustment may perform adjustment by varying the passage length over which heat exchange is performed by the internal heat exchanger (,). Good cycle efficiency is achieved by maintaining the optimal high-pressure through cycle balance control. The freezing cycle can be temporarily protected against excessively high-pressure or excessively high discharge temperature at the compressor.