Integrated Coil Support End Stop for Solenoid Valve Stroke Control
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Solution Overview
Problem
Solenoid valves require separate components for stroke limiting, which occupy valuable installation space and increase material and manufacturing costs, and existing designs suffer from frictional losses and mechanical stress.
Innovation Solution
The solenoid valve integrates the coil into a plastic coil carrier with negligible magnetic conductivity, using a magnetically conductive flux element to direct magnetic flux into the magnetic armature, and incorporates a decoupled armature shaft and valve stem with a plastic buffer element to reduce friction and mechanical stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional solenoid valve with a movable armature and coil is used, then the valve can control fluid flow, but the internal cavity becomes a breeding ground for bacteria due to moisture accumulation and difficulty in drying
Solution Approach 1:
The patent extracts the armature from the internal cavity by designing it as an external component that actuates the valve through a magnetic field generated by the coil. This removes the source of moisture accumulation and bacterial breeding from the sealed cavity, eliminating the hygiene problem while maintaining valve functionality.
2Measurement precision
If the solenoid valve uses a magnetic field to actuate the valve, then the armature can be positioned precisely, but the coil generates heat that may affect surrounding components
Solution Approach 1:
The patent introduces a magnetic field as an intermediary between the coil and the armature. The magnetic field transfers energy wirelessly through the sealed cavity wall, allowing precise armature positioning without direct thermal contact. This mediator approach enables precise control while isolating the heat-generating coil from the temperature-sensitive internal components.
3Reliability
If the solenoid valve maintains a sealed cavity to protect internal components, then the valve structure is protected, but moisture accumulates inside creating a breeding ground for bacteria
Solution Approach 1:
The patent extracts the moisture-generating components (armature and coil) from the sealed cavity. The armature is positioned externally and actuates the valve through magnetic coupling, eliminating internal moving parts that would trap moisture. This maintains the sealed cavity's protective function while preventing the conditions necessary for bacterial growth.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design allows for compact, efficient, and low-noise operation with reduced frictional losses and wear, enabling precise control of valve opening and closing, suitable for internal combustion engines.
Implementation Method 1
the coil (32) is arranged outside the sealed cavity (30) and the armature (33) is movable between a first position, in which the valve element (37) engages with the valve seat (38) to close the valve, and a second position, in which the valve element (37) is disengaged from the valve seat (38) to open the valve
Implementation Method 2
a valve element (37) which is arranged inside the sealed cavity (30) and is engageable with a valve seat (38) to close the valve or disengageable from the valve seat (38) to open the valve
Data Source
Figure 1
AI summary
The aim of the invention is to provide a solenoid valve (1) with a valve housing (2), in which an electric coil (3) and a solenoid armature (5) are arranged, and a valve element (8), which can be actuated in an axial actuation direction by the solenoid armature (5), for opening and closing the solenoid valve (1), wherein a valve stroke of the valve element (8) can be limited in a simple manner. According to the invention, this is achieved in that the coil (3) is arranged on a coil support (4), and an end section (4a) of the coil support (4), said section axially facing the solenoid armature (5), is designed as an end stop for the solenoid armature (5) in order to limit the axial movement of the solenoid armature (5). The coil support (4) is made of plastic, and the coil (3) is at least partly integrated into the coil support (4).