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:
Nov. 07, 1989
Filed:
Dec. 21, 1988
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A multiroom air conditioning apparatus includes an outdoor side unit having a compressor and an outdoor heat exchanger, and a plurality of room units having an indoor heat exchanger. A high-pressure gas pipe and a low-pressure gas pipe, connected to the compressor, are branched so that a high-side branch pipe and a low-side branch pipe are connected to the outdoor heat exchanger via outside valves. A liquid pipe through which a refrigerant passes from the high-pressure gas pipe is connected to the outdoor heat exchanger, and branched to provide liquid pipes. The indoor heat exchanger is connected to the branched liquid pipes via expansion device and to the high-side branch pipe and the low-side branch pipe via inside valves. By controlling the outside and inside valves, a selected room unit or units can be cooled or heated.