Electric Valve Core Assembly for Reduced Differential Pressure Force
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Solution Overview
Problem
Existing electric valves in commercial air conditioning systems face challenges in improving motion performance due to differential pressure forces, which affect the efficiency and reliability of refrigerant flow regulation.
Innovation Solution
The electric valve design includes a valve core member with an annular thin-wall portion and a connecting member that facilitates pressure balance, combined with a transmission system using a screw rod and nut for axial movement, reducing differential pressure forces and enhancing motion performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional valve core member structure is used, then the structure is simple, but the differential pressure force is large which deteriorates motion performance
Solution Approach 1:
The valve core member is divided into multiple components: a valve core body with an annular thin-wall portion, an upper cylindrical body, and a connecting member with axial through holes. This segmentation creates pressure balance channels that equalize differential pressure on both sides of the valve core, reducing the net force and improving motion performance while maintaining structural integrity.
Solution Approach 2:
The connecting member acts as an intermediary element that connects the upper cylindrical body to the valve core body. It contains axial through holes that serve as pressure balance channels, mediating the pressure distribution across the valve core member and reducing the differential pressure force that would otherwise hinder motion.
2Strength
If the valve core member is made robust to withstand pressure, then strength is improved, but motion performance deteriorates due to increased differential pressure force
Solution Approach 1:
By segmenting the valve core member into distinct components with pressure balance channels, the design maintains structural strength to withstand system pressure while creating pathways that equalize pressure distribution. This reduces the net differential pressure force acting on the moving parts, enabling faster motion without compromising pressure resistance.
Solution Approach 2:
The design changes the pressure distribution parameters by introducing pressure balance channels through the connecting member and axial through holes. This alters the pressure field around the valve core, reducing the differential pressure differential while maintaining the ability to withstand system operating pressures.
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 solution effectively reduces differential pressure forces on the valve core member, improving the motion performance and reliability of the electric valve, ensuring stable refrigerant flow regulation and efficient operation.
Implementation Method 1
the transmission member includes a screw rod and a nut, and the screw rod is in threaded connection with the nut
Implementation Method 2
the valve core body includes an annular thin-wall portion which can reduce the differential pressure force born by a valve core member, facilitate the pressure balance inside the electric valve
Data Source
AI summary
Provided is an electric valve and a manufacturing method thereof. The electric valve includes a valve body member, a valve seat member, a transmission member, a valve core member and a nut. The valve core member includes an upper tubular body including a first cavity, a valve core body and a connecting member. The valve core body is roughly in a round tubular shape and includes an annular thin wall portion and a second cavity. The connecting member includes a first axial through hole, and the upper end portion of the connecting member includes a lower stop portion. The annular thin wall portion is capable of abutting against a sealing portion of the valve seat member. A lower end portion of the nut is engageable with the lower stop portion to limit downward movement of the nut.