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:
Mar. 19, 2019
Filed:
Sep. 30, 2013
Hitachi-johnson Controls Air Conditioning, Inc., Minato-ku, Tokyo, JP;
Hitachi-Johnson Controls Air Conditioning, Inc., Tokyo, JP;
Abstract
It is an object to obtain an air conditioner capable of suppressing rise of compressor discharge temperature and individually controlling cooling capacity of a plurality of respective indoor units. For this purpose, the air conditioner is a multi-room air conditioner, in which a refrigeration cycle is formed by connecting an outdoor unithaving an outdoor heat exchanger to the plurality of indoor unitsandhaving indoor heat exchangersandand indoor expansion mechanismsandusing a liquid pipeand a gas pipe. Further, as refrigerant circulating through the refrigeration cycle, R32 or mixed refrigerant containing 70 mass % or higher percent of R32 is used. Further, a temperature difference detection device to detect an air temperature difference between inlet-side air and outlet-side air in the respective indoor heat exchangers of the respective indoor units is provided. The cooling capacity in the respective indoor units is controlled by regulating the indoor expansion mechanisms of the respective indoor units based on the air temperature difference in the indoor units detected with the temperature difference detection device.