Patent ID: 6918408

Claim:
A valve driving device comprising: a main case having one or more inlet pipes through which a fluid flows in from an external compressor and two or more outlet pipes through which said fluid flows out and also having built-in valve elements to open and close openings that are portions of a fluid path for said fluid and are connected to said outlet pipes to flow and stop said fluid; and driving means for driving said valve elements; wherein when said driving means are driven in the driving direction, said openings and said valve elements together can switch between four operation modes (close-close, open-close, close-open, and open-open) with respect to said two outlet pipes; three or more of said operation modes, including said close-close mode, being obtained; said driving means being driven back and forth while two modes of said three or more modes are assigned to be at both ends of said driving direction; and said close-close mode is assigned to be at one of said ends, wherein said valve element is composed of a ball, and two balls are operated by cam surfaces of cam members to close and open said two outlet pipes so that said four modes are established.