Self-Venting Filter Drain Assembly Vacuum Break
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Solution Overview
Problem
Existing liquid filter housing drainage systems face inefficiencies in draining higher viscosity liquids and contaminants due to inadequate venting, leading to slow drainage and potential leaks, especially when trying to break the vacuum in closed systems.
Innovation Solution
A drain assembly with a cylindrical configuration featuring a center tube and annular filter media, including an end cap with an air pocket and separate vent and liquid flow passages, allows air to enter and break the vacuum, facilitating efficient drainage by maintaining a hydrostatic pressure differential and preventing liquid from blocking the air vent passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closed drainage system is used without adequate venting, then the system maintains sealing integrity, but drainage efficiency deteriorates due to vacuum formation
Solution Approach 1:
The drainage system is segmented into separate functional passages: a liquid flow passage for draining contaminants and a vent passage for air intake. This segmentation allows independent optimization of each function, enabling the drain to maintain vacuum while efficiently draining liquids through dedicated pathways.
Solution Approach 2:
The vent passage acts as an intermediary element that introduces air into the closed system to break vacuum conditions. This intermediary air flow enables the liquid drainage function to operate efficiently without compromising the overall sealing integrity of the filter housing.
2Productivity
If higher viscosity liquids are drained without proper venting, then the liquid flow rate decreases, but adding venting increases system complexity
Solution Approach 1:
The vent passage and liquid flow passage are merged into a single integrated drain assembly structure. Both passages are formed within the same component housing, eliminating the need for separate venting mechanisms and reducing overall system complexity while enabling efficient drainage of high viscosity liquids.
Solution Approach 2:
The drain assembly serves multiple functions simultaneously: it provides liquid drainage through the liquid flow passage, air venting through the vent passage, and vacuum breaking through the coordinated action of both passages. This multi-functionality reduces the need for additional components.
3Productivity
If air venting is added to break vacuum, then drainage efficiency improves, but liquid may block the vent passages
Solution Approach 1:
The vent passage is positioned and configured with specific local characteristics: it is located above the liquid level and has a smaller cross-sectional area compared to the liquid flow passage. This local differentiation ensures that air can enter to break vacuum while liquid cannot easily block the vent passage.
Solution Approach 2:
The system utilizes vertical positioning in the air-liquid interface region to differentiate functions. The vent passage is positioned in the gaseous phase region above the liquid, while the liquid flow passage handles liquid flow. This spatial arrangement in different dimensions prevents liquid blockage of the vent while maintaining efficient air intake.
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 enables efficient drainage of higher viscosity liquids and contaminants by ensuring continuous flow without vacuum issues, reducing the risk of leaks and improving overall drainage efficiency.
Implementation Method 1
inadequate venting, leading to slow drainage and potential leaks, especially when trying to break the vacuum in closed systems
Implementation Method 2
facilitating efficient drainage by maintaining a hydrostatic pressure differential
Implementation Method 3
a filter element that includes an end cap with an attachment pocket and an air pocket that surrounds the attachment pocket
Data Source
AI summary
A filter element is provided that has a generally cylindrical configuration and that defines a longitudinal axis and a radial direction. The filter element comprises a center tube that defines a central reservoir and that includes annular filter media surrounding the center tube and the central reservoir, an open end joined to the center tube disposed along the longitudinal axis, the open end including an opening allowing fluid to flow from the central reservoir to the outside of the filter element, and a closed end joined to the center tube opposite the open end disposed along the longitudinal axis, the closed end including an end cap comprising a body that defines an attachment pocket and an air pocket that surrounds the attachment pocket.