Electronic Expansion Valve Rod Member Positioning for Precise Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing electronic expansion valves face challenges in achieving a precise connection between the rod member and the valve sleeve, leading to poor yield due to difficulties in positioning the circumference of the rod member during assembly.
Innovation Solution
The electronic expansion valve incorporates a positioning structure at the second end of the rod member, which allows for precise positioning of the rod member's circumference, enhancing the connection quality between the rod member and the valve sleeve, and includes a balancing channel to maintain balanced fluid pressures, facilitating a secure and efficient assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the rod member is connected to the valve sleeve without a positioning structure, then the assembly process is simpler, but the connection precision and product yield deteriorate
Solution Approach 1:
A positioning flat surface is provided on the peripheral surface of the rod member, creating an asymmetric feature that enables precise circumferential positioning during assembly. This asymmetric positioning structure allows the rod member to be accurately oriented relative to the valve sleeve, solving the connection precision problem without requiring complex positioning mechanisms.
2Productivity
If no positioning structure is provided on the rod member, then the manufacturing process is simpler, but the product yield deteriorates due to poor connection
Solution Approach 1:
The positioning flat surface creates an asymmetric geometry on the otherwise cylindrical rod member, enabling reliable circumferential positioning during assembly. This simple asymmetric feature significantly improves connection precision and product yield by ensuring consistent orientation and fit between the rod member and valve sleeve.
3Manufacturing precision
If the rod member circumference is not positioned, then the assembly process is faster, but the connection quality deteriorates
Solution Approach 1:
The positioning flat surface provides a natural alignment feature that guides the assembly process. During assembly, the flat surface automatically orients the rod member correctly relative to the valve sleeve, making the operation easier and ensuring high connection quality without requiring complex positioning procedures.
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 solution ensures a precise and reliable connection between the rod member and the valve sleeve, improving the yield of electronic expansion valves and preventing loose blocking caused by pressure differences, thereby enhancing the overall performance and efficiency of the valve.
Implementation Method 1
an elastic member, provided in the cavity of the valve head, wherein one end of the elastic member cooperates with the valve head, and the other end of the elastic member is able to be compressed by the rod member
Implementation Method 2
a first channel is provided between the rod member and the valve sleeve, and the first channel and the cavity of the valve head together form a balancing channel penetrating through the valve head
Data Source
AI summary
Some embodiments of the present invention provides an electronic expansion valve, including: a valve body, the valve body having a valve port; a valve head, movably provided in the valve body, the valve head being configured for blocking the valve port; a rod member, the rod member having a first end and a second end opposite to each other, wherein the first end is provided in a cavity of the valve head in a penetrating manner, the second end has a positioning structure, the positioning structure is configured for positioning a circumference of the rod member, the positioning structure is a positioning flat surface, and the positioning flat surface is parallel to an axis of the rod member; a valve sleeve, provided in the cavity of the valve head.