Method and apparatus for valve core installation/removal
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Solution Overview
Problem
Conventional Schrader valves in HVACR systems face limitations due to flow restrictions and require periodic replacement, complicating maintenance and refrigerant handling.
Innovation Solution
A dual-valve, valve core installation/removal tee allows for the removal and replacement of Schrader valve inserts without evacuating the system, using a dual-valve setup with primary and secondary ports, ball valves, and a friction control assembly to manage valve core removal and installation, minimizing flow restrictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional Schrader valve with core depressor is used, then refrigerant flow is enabled when connected, but flow restriction occurs and periodic replacement is needed
Solution Approach 1:
The patent removes the Schrader valve core entirely from the service port, extracting the problematic component that causes flow restriction and requires periodic replacement. The service port is redesigned to function without a valve core, eliminating the need for core depressors and allowing unrestricted refrigerant flow while maintaining system integrity through alternative sealing mechanisms.
2Reliability
If a valve core is installed in the Schrader valve, then refrigerant flow is prevented when disconnected, but maintenance requires system evacuation
Solution Approach 1:
The patent segments the sealing function from the valve core by implementing a separate seal assembly that remains in the service port when the valve core is removed. This allows the sealing function to be maintained independently, enabling valve core replacement without system evacuation while preserving refrigerant containment through the remaining seal assembly.
3Ease of operation
If a core depressor is used to open the valve, then refrigerant flow is enabled, but the structure adds complexity to the valve assembly
Solution Approach 1:
The patent extracts and eliminates the core depressor mechanism entirely by removing the valve core that requires depression. The service port is redesigned to allow direct access to the service port opening without needing a separate depressor tool, thereby simplifying the overall assembly structure while maintaining ease of operation for refrigerant service.
Data Source
AI summary
A dual-valve, valve core installation/removal tee enable the removal and or replacement of a Schrader® valve insert without evacuating the refrigeration system. The use of a dual-valve valve core installation/removal tee also permits the valve core to be removed and maintenance of the HVAC system to be performed without the flow restriction of the valve core and core depressor.