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:
Sep. 25, 2007
Filed:
Feb. 24, 2005
IL Nahm Hwang, Ansan-si, KR;
Sai Kee OH, Seoul, KR;
Yoon Been Lee, Seoul, KR;
SE Dong Chang, Kwangmyung-si, KR;
Il Nahm Hwang, Ansan-si, KR;
Sai Kee Oh, Seoul, KR;
Yoon Been Lee, Seoul, KR;
Se Dong Chang, Kwangmyung-si, KR;
LG Electronics Inc., Seoul, KR;
Abstract
Disclosed herein is a control method for a multiple heat pump. In the control method, when one of multiple indoor units operates in the heating mode and the other indoor units shut down, electronic expansion valves of the shutdown indoor units are controlled to have an opening degree higher than a standard opening degree if an outlet temperature of compressors is higher than a preset temperature, so as to permit a liquid refrigerant, remaining in the shutdown indoor units, to be more readily recovered to the compressors. This eliminates a refrigerant shortage phenomenon of the compressors and prevents deterioration of heating performance as well as reduction of life-span of the compressors.