Electric Valve Core Structure for Sealing and Pressure Balancing
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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 enhances the valve's ability to open and close efficiently by utilizing a screw nut to drive the valve core axially and improve sealing performance through a balanced flow path and positioning of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the valve core structure is simplified to improve manufacturing, then the sealing performance and action performance may deteriorate
Solution Approach 1:
The valve core body is divided into multiple functional sections: an annular thin-walled portion for sealing, a lower stop component with axial through hole for pressure balancing, and a valve core opening for flow control. This segmentation allows each part to perform its specific function optimally while maintaining overall manufacturing feasibility through integral structure.
Solution Approach 2:
Different portions of the valve core body have different wall thicknesses and structural characteristics tailored to their specific functions. The annular thin-walled portion provides flexible sealing contact, while other sections maintain sufficient thickness for structural integrity. This local differentiation optimizes both sealing performance and manufacturability.
2Device complexity
If the valve core is made as a single integral structure to simplify assembly, then the ability to balance pressure and improve action performance is limited
Solution Approach 1:
While maintaining an integral valve core body for simple assembly, the design incorporates functionally distinct sections including the annular thin-walled portion, lower stop component, and valve core opening. These segmented functional zones enable pressure balancing and improved action performance within a unified structure that remains easy to assemble.
Solution Approach 2:
The integral valve core body performs multiple functions simultaneously: sealing through the annular thin-walled portion, pressure balancing through the lower stop component with axial through hole, and flow control through the valve core opening. This multi-functionality achieves complex performance goals without increasing assembly complexity.
3Reliability
If the annular thin-walled portion is designed to abut against the sealing portion for better sealing, then the pressure difference across the valve core increases making opening harder
Solution Approach 1:
The valve core body is segmented into an annular thin-walled sealing portion and a lower stop component with an axial through hole. This segmentation creates separate pressure zones (upper chamber and lower chamber) that enable pressure balancing, reducing the net force required to open the valve while maintaining effective sealing contact.
Solution Approach 2:
The lower stop component with its axial through hole acts as an intermediary structure that allows pressure equalization between upper and lower chambers. This mediator reduces the pressure differential force acting on the sealing portion, making valve opening easier while preserving sealing effectiveness.
4Reliability
If the lower stop component includes an axial through hole for pressure balancing, then the structure becomes more complex increasing manufacturing difficulty
Solution Approach 1:
The lower stop component is merged with the valve core body as an integral structure, combining the stop function and pressure balancing axial through hole into a single manufactured piece. This merging eliminates separate assembly steps and reduces overall manufacturing complexity despite the added functional capability.
Solution Approach 2:
The lower stop component serves multiple functions: providing a stop position for the valve core and enabling pressure balancing through its axial through hole. This multi-functionality achieves pressure balancing capability without requiring additional separate components, thereby limiting the increase in manufacturing complexity.
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 improves the action performance of the electric valve by ensuring reliable sealing, reducing pressure differences, and facilitating smooth opening and closing operations, thus meeting the higher performance requirements of commercial air-conditioning systems.
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 includes a valve seat component, a valve body component, and a valve core component. The valve core component includes a sealing portion. The valve core component is arranged in a valve chamber of the electric valve, and the valve core component includes a valve core body. The valve core body is substantially tubular, the valve core body has an integral structure, and the valve core body includes an annular thin-walled portion to abut against the sealing portion of the valve seat component. The thickness of the annular thin-walled portion is M, and 0.3 mm≤M≤2.0 mm.