Patent ID: 7841196
Filing Date: 2010-11-30
Classification: F25B

Abstract:
1. A variable-capacity air conditioner comprising: a compressor operable at a first capacity and a second capacity less than the first capacity to compress a refrigerant; an indoor heat-exchanger coupled to the compressor; an outdoor heat-exchanger coupled to the compressor; a piping for coupling the compressor, the indoor heat-exchanger, and the outdoor heat-exchanger; a first capillary tube provided in the piping; a second capillary tube provided in the piping, the second capillary tube being connected in series with the first capillary tube; a by-pass pipe connected in parallel to the second capillary tube; a valve for opening and closing the by-pass pipe; a controller for controlling the compressor and the valve such that the variable-capacity air conditioner operates in three stages; and a voltage detector for detecting a voltage applied to the compressor, wherein