초록 ▼

An electrically actuated valve for incremental fluid flow rate control is disclosed. The valve is comprised of a valve body having an interior with a planar outlet surface against which a rectilinear valve element is slidingly operated. The valve body includes an inlet orifice and an outlet orifice

An electrically actuated valve for incremental fluid flow rate control is disclosed. The valve is comprised of a valve body having an interior with a planar outlet surface against which a rectilinear valve element is slidingly operated. The valve body includes an inlet orifice and an outlet orifice in the planar outlet surface for fluid flow through the valve body. The valve element has an orifice therethrough controlling flow through the outlet orifice in accordance with the position of the valve element, which is linearly actuated by a rotary stepper motor. Linear actuation of the valve element by the rotary stepper motor is accomplished by a shaft extending through and rotating in bearings at opposing ends of the valve body. A drive key on the shaft interfits a corresponding slot in the valve element and converts rotary motion of the shaft to linear motion of the valve element.

대표청구항 ▼

A refrigeration system for controllably circulating refrigerant in closed loop connection comprised of: an evaporator for gasifying refrigerant; a compressor in flow connection with said evaporator for receiving and compressing said gasified refrigerant; a condenser in flow connection with said comp

A refrigeration system for controllably circulating refrigerant in closed loop connection comprised of: an evaporator for gasifying refrigerant; a compressor in flow connection with said evaporator for receiving and compressing said gasified refrigerant; a condenser in flow connection with said compressor for receiving and liquifying said refrigerant; a variable flow rate expansion valve in flow connection with said condenser for receiving said liquified refrigerant and controllably expanding said refrigerant, said valve being in flow connection for directing said expanded refrigerant to said evaporator, said valve comprised of: a valve body defining an internal metering chamber, said valve body having a first wall with an inlet aperture for permitting fluid flow into said metering chamber and a second wall including a substantially planar outlet surface with an outlet aperture for permitting fluid flow from said metering chamber; a drive shaft disposed in said metering chamber; means for rotationally supporting said drive shaft in substantial axial rigidity; means for incrementally rotating said drive shaft; a substantially rectilinear metering piston disposed in said metering chamber in sliding engagement with said planar outlet surface, said metering piston having a metering orifice; and means for converting rotation of said drive shaft to linear movement of said metering piston, said converting means engaging said drive shaft and further engaging said metering piston; means for sensing refrigerant condition in said refrigeration system; and means for controllably incrementing said variable flow rate expansion valve in response to said means for sensing refrigerant condition.