Patent Number: 7,762,091

Title: Apparatus for controlling the capacity of an air conditioner and control method using the same

Abstract: Disclosed herein is an apparatus for controlling the capacity of an air conditioner and a control method using the same. The capacity control apparatus is configured in such a fashion that a 3-way or 4-way direction-switching member and a low-pressure equalizing solenoid valve are provided at a refrigerant path of the air conditioner having a pair of first and second compressors, so that the compression capacity of the air conditioner is adjusted into three stages of 100%, 60%, and 40% using the first and second compressors, enabling easy variable-capacity operation. This has the effect of considerably reducing energy consumption and of preventing wear of the first and second compressors via a rapid compensation of a pressure unbalance between both the compressors. As a result, under any operating condition, it is possible to prevent a liquid backflow phenomenon from occurring when starting operation of the compressors, resulting in an improvement in the reliability and operation efficiency of the compressors.

Inventors: Jin; Dong Sik (Cheonan-si, KR), Kim; Young Wan (Cheonan-si, KR), Kim; Seok Kyun (Cheonan-si, KR), Kim; Soon Gon (Goyang-si, KR)

Assignee: Winiamando Inc.

International Classification: F25B 7/00 (20060101); F25B 41/00 (20060101); F25B 49/00 (20060101)

Expiration Date: 7/27/12018