Danfoss A/s

Leo Finn Jensen

Anders Pedersen

Hans Kurt Petersen

Jesper Schmidt Hansen

Alexandra Papadimitriou

Detlet Matzen

An expansion valve () is described to include a housing () having in inlet port () and an outlet port (), a valve seat () arranged between the inlet port () and the outlet port (), a valve element () movable over an operating stroke between a closed position at the valve seat () and an opened position away from the valve seat (), and an actuator (), wherein the actuator () has an electric rotary motor () acting on the valve element () by means of a threaded spindle () and a nut (), wherein one of spindle () and nut () is rotatably driven by the motor () and the other one is rotatably fixed. Such an expansion valve should have the possibility for a simple assembly. To this end, in a disassembled condition of housing () and actuator (), the actuator () has a mounting stroke which is at least two times the operating stroke, wherein the mounting stoke extends the operating stroke.

Expansion valve

A valve arrangement comprising a valve housing, a valve inlet, a valve outlet and a diaphragm assembly for controlling a fluid flow through the valve housing from the valve inlet to the valve outlet, the diaphragm assembly comprising a diaphragm and a diaphragm plate at least partially covering the diaphragm, the diaphragm comprising one or more equalization holes passing through the diaphragm and the diaphragm plate comprising one or more equalization openings passing through the diaphragm plate, the equalization holes being aligned with the equalization openings. The diaphragm assembly comprises an engagement zone engaging the diaphragm in order to rotationally fix the diaphragm and the diaphragm plate with respect to each other so that the equalization holes will keep aligned with the equalization openings to ensure proper function of the valve arrangement at all times.

Valve arrangement and diaphragm assembly for a valve arrangement

The invention relates to a valve () comprising a main valve (), a pilot valve (), a housing (), an inlet () and an outlet (). Opening and closing of the main valve () is controlled by the pilot valve (). A pilot valve seat () is arranged in a diaphragm (). A pilot chamber () is arranged in the housing () separated from the inlet () and the outlet () by the diaphragm (). Task of the invention is to provide a valve with a lower cost. According to the invention a support member () supports the diaphragm (), wherein the support member () is guided in the housing, and wherein a radial gap () is arranged between the radially outer end of the diaphragm () and the housing () in a radial direction perpendicular to the opening direction of the pilot valve (). Thereby, a cheaper, less resistant material for the diaphragm can be used.

Valve with a pilot valve seat arranged in a diaphragm

A solenoid valve includes a housing, having an inlet and an outlet, wherein the solenoid valve also includes a valve element and a valve seat. To provide a solenoid valve to be used with high maximum operating pressure differences between inlet and outlet, the solenoid valve includes at least one progressive spring, wherein the valve element is forced by the at least one progressive spring. Thereby, the spring force acting on the valve element in the closed position of the valve may be decreased, while still retaining a large spring force in the opened position of the solenoid valve.

Growing community of inventors

Middelfart, Denmark

Leo Finn Jensen