Motor Valve Pipe Structure for Rectifying Member Positioning
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Solution Overview
Problem
Conventional motor valves in refrigeration systems face issues with air bubble growth and noise due to the proximity of rectifying members to the valve chamber, leading to insufficient bubble stabilization and positioning challenges when trying to secure these members in the middle of the pipe.
Innovation Solution
A motor valve design with a rectifying member fixed within a pipe using a swaging portion to restrict axial movement, allowing for adjustable positioning and effective bubble stabilization, featuring a large and small diameter portion with a step portion for secure fixation and reduced noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the rectifying member is arranged between the end of the pipe and the outer wall of the valve body, then the structure is simple, but the distance between the rectifying member and the valve chamber is short, resulting in insufficient bubble stabilization
Solution Approach 1:
The patent introduces a step portion that creates an axial dimension change in the pipe structure, allowing the rectifying member to be positioned at a specific distance from the valve chamber. This dimensional change enables the rectifying member to be arranged in the middle of the pipe rather than directly against the valve body, providing sufficient space for bubble stabilization while maintaining structural simplicity through the integrated step portion design.
2Manufacturing precision
If the rectifying member is arranged in the middle of the pipe, then the bubble stabilization effect is improved, but it requires great deal of time and effort to secure the positioning accuracy and the fixing strength
Solution Approach 1:
The step portion is pre-formed on the pipe at a specific location, which serves as a built-in positioning feature before the rectifying member is installed. This preliminary action eliminates the need for complex external positioning mechanisms or additional fixing operations, as the step portion itself provides both the positioning reference and the mounting surface for the rectifying member, significantly reducing assembly time and effort.
Solution Approach 2:
The step portion acts as an intermediary element between the pipe and the rectifying member, providing a dedicated interface that simplifies the connection. This intermediary structure enables easy installation by serving as both a positioning stop and a mounting surface, eliminating the need for separate positioning and fixing operations.
3Manufacturing precision
If a cone-shaped rectifying member is used to increase the number of small holes, then the bubble fining effect is improved, but the tip of the cone interferes with the valve body or sufficient distance cannot be secured
Solution Approach 1:
The pipe structure is segmented into different diameter portions with a step portion, creating distinct functional zones. This segmentation allows the cone-shaped rectifying member to be positioned at a specific location where it can exert its bubble fining effect without the tip interfering with the valve body, as the step portion provides a natural stopping point that maintains the required distance.
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 ensures reliable and accurate positioning of the rectifying member, preventing air bubble growth and reducing noise effectively, while simplifying the assembly process and enhancing sealing performance.
Implementation Method 1
a swaging portion that deforms a wall portion of the pipe facing the rectifying member in the inner diameter direction of the pipe and fixes the rectifying member to the wall portion of the pipe
Implementation Method 2
bubbles in the two-phase flow are fined to prevent the generation of the pressure waves due to the bursting of the bubbles when passing through the orifice, by arranging a rectifying member such as a porous plate at the port of the motor valve and the pipe connection portion
Data Source
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AI summary
Provided is a motor valve capable of fixing a rectifying member reliably at a position away from a valve body with good positioning accuracy by a simple structure. A plurality of ports 4, 5 are provided in a valve chamber of the motor valve. A plurality of pipes 6, 7 is fixed respectively to the plurality of ports 4, 5 and connecting the motor valve and an external device. The second pipe 7 includes a large diameter portion 7a, a small diameter portion 7b, and a step portion 7c. The rectifying member 9 is inserted into the large diameter portion 7a of the second pipe 7 in a state where an axial movement of the second pipe 7 is restricted by the step portion 7c. The swaging portion 10 which is a positioning means fixes the second pipe 7 and the rectifying member 9 inserted in the large diameter portion 7a.