Valve Core Assembly With Thin-Walled Flow Balancing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The action performance requirements of electric valves in commercial air-conditioning systems, particularly in variable refrigerant flow systems, are increasing, necessitating improved designs to enhance their operational efficiency and reliability.
Innovation Solution
The electric valve design includes a valve core component with an annular thin-walled portion and a lower stop component, integrated into a tubular valve core body, along with a screw nut and sealing assembly, which allows for precise control of fluid flow by abutting or separating from the valve seat component, improving the valve's ability to open and close effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the valve core body uses a thick-walled integral structure, then the strength and structural stability are improved, but the pressure difference reduction capability and fluid flow performance deteriorate
Solution Approach 1:
The valve core body employs different wall thicknesses in different regions: the annular thin-walled portion has a wall thickness of 0.5-2mm to reduce pressure difference and improve fluid flow, while other portions maintain sufficient thickness for structural strength. This local differentiation resolves the contradiction between overall strength and local fluid dynamics performance.
Solution Approach 2:
The valve core body is segmented into multiple functional portions: an annular thin-walled portion for pressure balance, a large-diameter section for structural support, and a diameter-reduced section for sealing. This segmentation allows each portion to optimize its specific function while contributing to overall reliability.
2Reliability
If the valve core body is designed with complex internal structures to improve fluid flow control, then the action performance is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The valve core body is divided into three main sections (annular thin-walled portion, large-diameter section, diameter-reduced section) that can be manufactured using standard processes and then assembled. This segmentation achieves complex fluid flow control functionality while maintaining manufacturing feasibility through modular construction.
Solution Approach 2:
The lower stop component is nested within the inner chamber of the valve core body, and the sealing assembly is positioned within the diameter-reduced section. This nesting arrangement achieves complex internal functionality without increasing external dimensions or requiring overly complex manufacturing processes.
3Ease of manufacture
If the valve core component uses multiple separate parts to improve assembly flexibility, then the ease of manufacture is improved, but the structural integrity and sealing performance deteriorate
Solution Approach 1:
The valve core component is segmented into manufacturable sections that are assembled together, but the assembly uses welding and crimping processes to create joints with integrity comparable to or exceeding that of single-piece constructions. The diameter-reduced section is crimped to the sealing assembly, and the valve seat body is welded to the valve port jacket, ensuring reliable sealing.
Solution Approach 2:
The sealing assembly acts as an intermediary component that connects the diameter-reduced section of the valve core body to the valve seat component. This intermediary ensures reliable sealing while allowing the separate manufacturing of component parts.
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 enhances the action performance of the electric valve by reducing pressure differences and improving fluid flow, leading to smoother operation and increased reliability, while also allowing for bidirectional flow and efficient manufacturing processes.
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 valve core body includes an annular thin-walled portion... the annular thin-walled portion can abut against or be separated from a sealing portion of the valve seat component
Data Source
AI summary
A valve core assembly includes a transmission component and a valve core component. The valve core component includes a valve core body and a lower stop component, and the valve core body is substantially tubular. The lower stop component is provided in an inner chamber of the valve core body and is fixedly connected to the valve core body. The lower stop component includes a lower stop portion. An upper chamber is located above the lower stop portion, and a lower chamber is located below the lower stop portion. The lower stop component includes a first axial through hole communicating with the upper chamber and the lower chamber.