Electromagnetic proportional valve and system having a proportional valve

Abstract

The invention relates to an electromagnetic proportional valve (1), preferably for refrigerant, comprising the following: an armature (3) of an electromagnet (2), which is movably arranged axially between a rest position, an actuating position and working positions and on which an actuating element (22) is arranged; a piston (14), which is designed as a hollow piston and has, on a first axial end region (32), a first opening (33) toward an inflow (11) of the expansion valve (1) and has, on a second axial end region (34), a second opening (35) toward a pressure equalization chamber (29); and a blocking body (24), which is designed to close the second opening, wherein the piston (14) is axially movably arranged and wherein the piston (14) is designed to block a fluid passage as a shut-off element of a main valve device (13), wherein the fluid passage of the main valve device (13) is blocked in the rest position of the armature (3), wherein the actuating element (22) is designed to act on the blocking body (24) when the armature (3) is in the actuating position such that said blocking body exposes the second opening at least in regions, and wherein the fluid passage of the main valve device (13) is opened in the working positions of the armature (3). The invention furthermore relates to a system having such a proportional valve (1).

Description

technical field [0001] The invention relates to an electromagnetic proportional valve. Furthermore, the invention relates to a system with an electromagnetic proportional valve. Background technique [0002] Valves are commonly used to block and / or control the flow of fluids. Simpler valves are only discretely controllable. This means that they can only be switched on / off (auf / zu), ie can only be opened and closed. However, simple opening and closing of the valve is no longer sufficient for many applications. For example, expansion valves used in battery cooling, air conditioning, or heat pump systems to create a defined and controlled pressure drop there between the condenser (heat release) and evaporator (cooling), such use usually requires a more continuous switch. Overall, therefore, continuous switching is often required. Such a continuous or continuous switching can be realized, for example, by means of a proportional valve which allows a continuous transition of...

AI Technical Summary

Problems solved by technology

[0003] However, the construction of the known proportional valves is very complex, so that the proportional valves cannot be produced simply and cost-effectively

In addition, the increased complexity often leads to disturbances in the individual functions of the proportional valves

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