ELECTRIC EXPANSION VALVE

DE602018092191T2Active Publication Date: 2026-07-08DANFOSS AS

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Patent Information

Authority / Receiving Office: DE · DE
Patent Type: Patents
Current Assignee / Owner: DANFOSS AS
Filing Date: 2018-12-20
Publication Date: 2026-07-08

AI Technical Summary

Technical Problem

Existing electric expansion valves require precise alignment of the motor with respect to the valve housing, leading to high manufacturing costs and reduced lifetime due to wear on moving parts.

Method used

A connection between the valve element and the motor via a spring element allows for radial displacement, enabling a fixed rotor position relative to the valve housing, using a lead screw and lead nut transmission to maintain consistent torque and reduce wear by allowing a small offset between the axis of rotation and the valve element.

Benefits of technology

This design maintains consistent magnetic forces and reduces wear, ensuring a longer lifespan while lowering production costs by allowing for less precise alignment during manufacturing.

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