Primary-Secondary Boiler Loop Adapter for Purge Without Pressure Loss
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Solution Overview
Problem
Historical hydronic system purging methods are inefficient due to multiple connections leading to potential leak paths, incomplete shutoff, and internal flow restrictions, which affect system operation and maintenance.
Innovation Solution
A primary/secondary loop adapter and valve apparatus with a flow diversion device that allows for complete and unobstructive purging of air from the piping system without pressure decrease, utilizing a combination of ball valves for effective shutoff and reduced connection joints, enabling simultaneous emptying and filling of the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional purge valves with multiple connections are used, then air can be removed from the system, but multiple connection joints create potential leak paths and reduce system reliability
Solution Approach 1:
The patent combines multiple connection joints into a single integrated purge valve assembly that interfaces with the system through one main connection. This merging of multiple potential leak paths into a unified component eliminates the cumulative risk of leaks at each joint while maintaining the necessary purging functionality.
Solution Approach 2:
The invention extracts the purge function from the main system circulation and isolates it in a dedicated valve assembly with its own independent connection points. This allows the purge operation to be performed through a controlled, sealed interface rather than requiring multiple connection joints within the main system.
2Ease of operation
If check valves are used for purging, then air can be removed, but the check valve provides incomplete shutoff and creates internal flow restrictions affecting system operation
Solution Approach 1:
The patent employs a dynamically controllable valve mechanism that can transition between fully open, fully closed, and intermediate positions. Unlike a passive check valve, this active valve can be precisely controlled to provide complete shutoff when needed while minimizing flow restriction during normal operation, optimizing both purge effectiveness and system efficiency.
Solution Approach 2:
The invention changes the operational parameters of the valve from the fixed, passive characteristics of a check valve to a controllable valve with adjustable opening degree and flow characteristics. This allows the valve to adapt its behavior based on system requirements, providing complete shutoff for purging while maintaining minimal resistance during normal circulation.
3Reliability
If purge valves are located on the secondary loop, then air can be removed from the secondary loop, but pressure differentials are created that affect the operation of the remainder of the system
Solution Approach 1:
The patent introduces an intermediary purge valve assembly that acts as a buffer between the secondary loop and the main system. This intermediary component allows air to be removed from the secondary loop while maintaining pressure equilibrium with the primary system, preventing harmful pressure differentials from developing during the purging operation.
Data Source
AI summary
A boiler loop system including a primary-secondary piping loop interface apparatus including a flow diversion device, and a drain valve, and a drain port in branches from a circumferential sidewall. In an embodiment, supply branch piping and return branch piping connect the primary-secondary piping loop interface apparatus to a boiler and provide attachment points for auxiliary plumbing equipment. In an embodiment, the boiler loop is integrated into the primary loop.