Heating Circuit Filling Fitting With Threaded Air Venting
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Solution Overview
Problem
Air pockets can form in the threaded engagement areas of heating circuit system components due to temperature fluctuations, leading to air pressure increases and potential air escape into the system, which is not effectively addressed by existing technologies.
Innovation Solution
An air collection space is created outside the heating medium-carrying component, connected to the threaded engagement area via a ventilation duct, allowing trapped air to be directed into an external air plenum and vented using a bleed valve, while a fluid connection between the ventilation channel and the component's interior enables simultaneous ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If filling and draining fittings are screwed to heating circuit system components, then the system can be filled and drained, but air pockets form in the threaded engagement area due to temperature fluctuations causing air pressure increases
Solution Approach 1:
The invention divides the venting function into two separate pathways: one for the interior space of the component and another for the threaded engagement area. The air collection space is segmented into regions that collect air from different sources, with dedicated ventilation channels leading to each region. This segmentation allows independent venting of air pockets without compromising the filling and draining function.
Solution Approach 2:
The air collection space acts as an intermediary chamber between the threaded engagement area and the exterior environment. Air trapped in the threaded engagement area is first directed into this intermediate air collection space, then vented through the bleed valve. This intermediary structure prevents direct air escape into the heating circuit system while providing a controlled venting path.
2Reliability
If ventilation channels are added to vent the threaded engagement area, then air pockets can be removed, but the device complexity increases
Solution Approach 1:
The air collection space serves multiple functions: it collects air from the interior space through one ventilation channel and from the threaded engagement area through another ventilation channel. The single bleed valve handles venting for both regions. This multi-functionality reduces the need for separate complex venting systems for each air pocket source.
Solution Approach 2:
The ventilation channels are integrated into the existing fitting structure, with channels nested within the walls of the air collection space and the fitting body. The air collection space itself is nested within or adjacent to the component, utilizing existing spatial arrangements. This nesting approach minimizes additional structural complexity while achieving effective air venting.
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
Prevents air from escaping into the heating circuit system, ensuring smooth operation by effectively venting air from the threaded engagement area and the component's interior, enhancing system reliability and efficiency.
Implementation Method 1
external air collection space being in fluid communication with the threaded engagement area via a ventilation duct
Implementation Method 2
the trapped air can escape into the heating circuit system... an external air plenum and can be vented therefrom by means of a bleed valve
Data Source
Figure 1~4
Figure 2
AI summary
The invention relates to a filling and draining fitting for a heating circuit system, in particular a heating circuit distributor (10) of a heating circuit system, comprising a connection stub (13) for connecting a filling or draining line, which connection stub can be inserted into a heating-medium-conducting component of the heating circuit system transversely to the flow direction of the heating medium, and comprising a valve stub (14) for connecting a venting valve, which valve stub can be connected to the connection stub by means of a threaded connection, in such a way that a connection part (16) of the connection stub and a valve-accommodating part (22) of the valve stub are arranged on a component wall (15) of the component from the outside, wherein in a overlap region (39), in which connecting parts (17, 23) of the valve stub and of the connection stub overlap, at least one venting channel (34) is provided, which connects a heating-medium-conducting interior (19) of the component to an air-collecting chamber (28) formed in the valve-accommodating part (22), wherein the venting channel has a fluid connection to a thread engagement region (27) of the connecting parts.