Siemens Schweiz Ag

Rolf Kunzmann

Karl-Heinz Petry

Martin Wetzel

Adrian Huwiler

Wolfgang Huber

Pascal Ernstberger

Alexander Jekimow

Various embodiments of the teachings herein include a valve comprising: a first port; a second port; a fluid path extending between the first port and the second port; a valve member situated in the fluid path, the valve member selectively moveable between a closed position, blocking the fluid path, and an open position; an armature coupled to the valve member and having a surface; and a solenoid forming a linear actuator with the armature. At least a portion of the surface of the armature directly faces the solenoid.

Expansion valve

Various embodiments of the teachings herein include a method for operating a valve comprising: determining a nonlinear characteristic curve function indicating a required relationship between a valve opening position and flow of a fluid; storing the function in an ECU; and using the function to set the valve opening position with a control signal indicating a target flow. The function is calculated automatically using a parameter value, with an analytic function, or by interpolation with specified supporting values by a user. The function comprises an inverse function based on a characteristic curve for a heat exchanger and a target function. The curve for the heat exchanger indicates a relationship between a heating power or a cooling power and the flow of a fluid. The target function indicates a relationship between the heating power or the cooling power of the heat exchanger based on the valve opening position. The characteristic curve for the heat exchanger depends on the same parameter value as the characteristic curve function.

Method for operating a valve, associated electronic control unit, and valve drive

A valve may include: a valve body; a valve member in the body, movable between closed and open, comprising a first orifice, a second orifice, a main conduit between them, and a bypass in fluid communication with the main conduit. The bypass includes a first portion with a first cross-section area and a second portion with a second cross-section area different from the first cross-section area. The valve body comprises a compensation chamber having a compensation orifice. The bypass comprises an outer bypass orifice defined by and disposed on the outer surface of the valve member. The valve member comprises an internal orifice situated between the bypass and the main conduit. In the closed position, the inlet is in fluid communication with the compensation chamber via the outer bypass orifice, the bypass, the internal orifice of the valve member, the main conduit, the first orifice, and the compensation orifice.

Growing community of inventors

Gernsbach, Germany

Rolf Kunzmann