Abstract: An expansion valve adapted to achieve a stable operation in case of variations of the pressure of a high-pressure refrigerant is actuated by a power element transmitting an opening force to a valve body via a rod located between the power element and the power body by applying couple forces to the rod and generating a retarding force for the rod while the rod is guided in the direction of its shaft line

Abstract: There is provided a three-function pressure switch adapted to be provided on the higher pressure side of the cooling cycle circuit in an automobile cooling device.The three-function pressure switch comprises a casing including a pressure inlet and a pressure receiving chamber, a diaphragm disposed within the pressure receiving chamber across the chamber, a first resilient disc disposed below the diaphragm for resilient warping subject to pressure from the chamber through the diaphragm, a first piston positioned below the disc for vertical movement as the disc warps, a holder for engaging the first piston, a second resilient disc disposed below the holder for warping as the holder moves, a first electrical switching section adapted to opened and closed by the first resilient disc and a second electrical switching section adapted to be opened and closed by the second resilient disc.