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:
Feb. 27, 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 four-way valves of a multiple heat pump. In the control method, if even at least one of four-way valves of respective outdoor units is not switched to a desired mode upon switching of all of the four-way valves to the desired mode, the other four-way valves, switched to the desired mode, is switched to an opposite direction of the desired mode, and then all of the four-way valves are switched again to the desired mode, thereby simply and rapidly correcting switching error of the four-way valves, resulting in normal operation of the multiple heat pump.