Thin-Walled Electric Valve Core for Fast Refrigerant Flow Control
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Solution Overview
Problem
The action performance requirements of electric valves in commercial air-conditioning systems, particularly in variable refrigerant flow systems, are increasing, and existing technologies have not adequately addressed these demands for improved performance.
Innovation Solution
The electric valve design includes a valve body, valve seat, transmission component with a screw rod and screw nut, and a valve core with an annular thin-walled portion, which allows for enhanced movement and sealing, improving the valve's ability to regulate refrigerant flow effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the valve core body uses a thick-walled integral structure, then the strength and manufacturing reliability are improved, but the action performance and responsiveness of the valve deteriorate
Solution Approach 1:
The patent applies a thin-walled structure for the valve core body that can flexibly deform under pressure differential forces. The thin wall allows the valve core to rapidly respond to opening/closing signals by deforming elastically, improving action speed while maintaining sufficient strength through optimal thin-wall design and material selection
2Reliability
If the valve core body uses a complex multi-component structure, then the sealing performance is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges multiple functions into the single valve core body component. The thin-walled valve core body integrates the sealing surface, the pressure-sensing function, and the opening/closing action into one unified structure, eliminating the need for separate sealing elements and reducing overall structural complexity while maintaining reliable sealing
Solution Approach 2:
The patent changes the wall thickness parameter of the valve core body to an optimized thin dimension. This parameter change enables the valve core to be sufficiently compliant for rapid action and good sealing while simplifying the overall structure by eliminating complex multi-component assemblies
3Productivity
If the valve core body uses a thin-walled structure, then the action performance and responsiveness are improved, but the manufacturing precision requirements and structural stability worsen
Solution Approach 1:
The patent optimizes the wall thickness parameter to a specific thin dimension that balances responsiveness with manufacturability. This optimized parameter ensures the valve core responds rapidly to control signals while remaining feasible to manufacture with standard precision capabilities
Solution Approach 2:
The patent applies different wall thicknesses to different portions of the valve core body. The thin-walled portion is localized to areas requiring high responsiveness, while other portions maintain sufficient thickness for structural support and manufacturing stability, achieving local optimization of the precision-stability trade-off
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
The design enhances the action performance of the electric valve by ensuring precise control over refrigerant flow, reducing pressure differences, and improving the reliability and efficiency of the valve's operation.
Implementation Method 1
a transmission component arranged in a valve chamber of the electric valve and including a screw rod and a screw nut, wherein the screw rod is in threaded connection with the screw nut
Implementation Method 2
the annular thin-walled portion can abut against or be separated from a sealing portion of the valve seat component
Implementation Method 3
the lower stop component includes a first axial through hole communicating with the upper chamber and the lower chamber
Data Source
AI summary
An electric valve and manufacturing method therefor, the electric valve including a valve body part, a valve seat part, a transmission part and a valve core part, wherein the valve core part includes a valve core body and a lower stop part; the valve core body is essentially tubular, and the valve core body is of an integrated structure and includes an annular thin wall portion; the lower stop part is arranged in an inner cavity of the valve core body, and the lower stop part comprises a lower stop portion; an upper cavity is present above the lower stop portion, a lower cavity is present below the lower stop portion, and the lower stop part includes a first axial through hole which is in communication with the upper cavity and the lower cavity.