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:
Jun. 24, 2003
Filed:
Apr. 18, 2002
Daikin Industries, Ltd., Osaka, JP;
Abstract
A refrigerating device has a refrigerant circuit having a compressor ( ), an indoor heat exchanger ( ), a main motor operated valve (EV ), and an indoor heat exchanger ( ) connected in a loop, and uses, as a working medium, an R32 refrigerant or a mixed refrigerant containing R32 at at least 70 wt %. A supercooling heat exchanger ( ) is disposed between the indoor heat exchanger ( ) and the main motor operated valve (EV ), and the liquid side of the refrigerant circuit are connected to the gas side by by-pass pipes ( ) through the supercooling heat exchanger ( ). A supercooling motor operated valve (EV ) is disposed at the by-pass pipe ( ) upstream of the supercooling heat exchanger ( ). A discharge temperature detected by a discharge temperature sensor ( ) is determined by a discharge temperature determination part ( ), and based on the determination result, the opening of the supercooling motor operated valve (EV ) is controlled so as to control an amount of the refrigerant flowing through the by-pass pipes ( ), whereby, using the working medium containing R32, the discharge temperature of the compressor is optimized without reducing the efficiency, and the COP and reliability are improved.