Electric valve and manufacturing method therefor
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Solution Overview
Problem
Existing electric valves in refrigeration systems face issues with high valve opening resistance and poor sealing performance due to frictional forces and abrasion between the valve needle and valve port, affecting operation reliability.
Innovation Solution
The electric valve design incorporates a valve core sleeve with guide mechanisms and an elastic member to align the valve needle accurately with the valve port, reducing frictional forces and improving sealing by using sliding clearance fits and an elastic thrust mechanism to facilitate easier opening and stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the valve needle is directly driven by the transmission component, then the structure is simple, but the valve opening resistance is large and the operation reliability is poor
Solution Approach 1:
The patent divides the direct drive mechanism into two separate stages: the transmission component drives the movable connecting component axially, and the movable connecting component separately drives the valve needle axially. This segmentation eliminates the rotational friction between the valve needle and transmission shaft, reducing valve opening resistance and improving reliability while maintaining structural simplicity.
Solution Approach 2:
Instead of the traditional approach where the transmission shaft directly rotates the valve needle, the patent inverts the mechanism by using a movable connecting component that converts rotational motion to axial motion first, then drives the valve needle axially. This inversion eliminates the harmful frictional force and improves valve opening reliability.
2Productivity
If the valve needle rotates with the transmission shaft, then the transmission is direct, but the abrasion of the contact surface aggravates and sealing performance deteriorates
Solution Approach 1:
The patent inverts the traditional rotational transmission mechanism by introducing a movable connecting component that converts rotational motion to axial motion. The valve needle is then driven axially by this component rather than rotating with the transmission shaft, eliminating abrasion and preserving sealing performance while maintaining efficient transmission.
Solution Approach 2:
The movable connecting component serves as an intermediary between the transmission component and the valve needle. It receives rotational motion from the transmission shaft, converts it to axial motion, and then drives the valve needle axially. This intermediary eliminates direct rotational contact between the valve needle and transmission shaft, preventing abrasion and maintaining sealing performance.
3Strength
If the elastic force load acts between the transmission shaft and valve needle, then the valve needle is supported, but the valve opening resistance increases and operation reliability decreases
Solution Approach 1:
The patent extracts the elastic force load from the transmission path between the transmission shaft and valve needle. The movable connecting component is designed to be driven axially without the interfering elastic force that causes friction and rotation. The valve needle is then driven axially by the movable connecting component, providing support while eliminating the harmful frictional effects and improving operation reliability.
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 enhances valve opening reliability and sealing performance by minimizing frictional resistance and abrasion, ensuring accurate alignment and stable operation of the valve needle, thereby improving the overall performance of the electric valve.
Implementation Method 1
an elastic member, wherein one end of the elastic member abuts against the movable connecting component, and another end of the elastic member abuts against the valve needle
Implementation Method 2
the first guide outer wall is in sliding clearance fit with the first guide inner wall... the second guide outer wall is in sliding clearance fit with the second guide inner wall
Data Source
AI summary
An electric valve includes a valve body component, a transmission component, and a valve needle component. The valve body component includes a valve core sleeve, and the valve core sleeve includes a first inner guide wall. A movable connecting component is in a suspended connection with the transmission component, the movable connecting component includes a connecting body, the connecting body includes a first outer guide wall, the connecting body includes a lower opening portion and an accommodating hole in communication with the lower opening portion, and a hole wall of the accommodating hole includes a second inner guide wall. The valve needle component includes a valve needle, the valve needle includes a second outer guide wall, the second outer guide wall is slidably in clearance fit with the second inner guide wall. A manufacturing method for the electric valve is further disclosed.