Filter Venting Structure for Initial Air-Liquid Separation
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Solution Overview
Problem
Existing filter devices fail to effectively discharge initial air from the filter case before filtration, leading to potential pump malfunctions and component damage due to air bubbles, and also discharge air with the liquid after filtration, causing inefficiencies.
Innovation Solution
A filter device with a cylindrical case, a lid body, a rod, and a moving member that allows initial air to be discharged through a separate pathway from the liquid, using an air vent passage and a moving member that floats on the liquid to prevent air from being discharged with the liquid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air vent hole is provided in filter case to discharge stagnant air, then air discharge function is improved, but initial air before filtration cannot be discharged and air is discharged together with liquid after filtration
Solution Approach 1:
The invention divides the air discharge function into two separate pathways: one for initial air (through the rod's internal passage) and one for liquid after filtration (through the outflow path). This segmentation allows each pathway to handle its specific function without interference, resolving the contradiction between air discharge capability and preventing air discharge with liquid.
Solution Approach 2:
The invention extracts the initial air discharge function from the main liquid outflow path by providing a separate pathway through the rod's internal passage. This extraction allows initial air to be discharged independently before filtration, preventing it from causing pump malfunctions while allowing liquid to flow through the normal filtration path.
2Object-generated harmful factors
If float moves to close air vent hole when liquid surface height is high, then liquid leakage is prevented, but initial air cannot be discharged before filtration starts
Solution Approach 1:
The rod's internal passage is designed to discharge initial air before filtration begins, when the liquid level is low and the float is in its initial position. This preliminary action ensures that air is removed from the system before the float rises to close the air vent hole, preventing both initial air from causing malfunctions and liquid from leaking.
Solution Approach 2:
The rod acts as an intermediary structure that provides a separate pathway for initial air discharge independent of the float's position. The rod's internal passage allows air to escape through a different mechanism than the float-controlled air vent hole, enabling initial air discharge even when the float is in its closed position.
3Reliability
If air is discharged through outflow path, then air venting is achieved, but liquid after filtration is discharged together with air causing inefficiency
Solution Approach 1:
The invention segments the discharge function into two distinct pathways: the rod's internal passage for air discharge and the outflow path for liquid discharge. This segmentation ensures that air and liquid are discharged separately, maintaining filtration efficiency while achieving effective air venting.
Solution Approach 2:
The invention extracts the air discharge function from the liquid outflow path by providing a separate pathway through the rod. This extraction allows air to be vented independently without interfering with the liquid filtration and discharge process, thereby maintaining productivity while achieving reliable 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
Enables the efficient discharge of initial air outside the filter device through a distinct pathway from the liquid, preventing air from being discharged with the liquid and reducing the risk of pump malfunctions and component damage.
Implementation Method 1
a moving member including a tubular hole into which the rod is inserted, the moving member moving along the rod by the tubular hole sliding along the rod
Data Source
AI summary
A rod having a substantially-cylindrical shape with both ends being covered is provided to a lid body, which covers an upper end surface of a case having a bottomed substantially-cylindrical shape, the rod protruding in the case. A first hole is formed in a portion of a side surface of the rod, which is exposed to the inside of the case. Further, an air vent pit (passage) is formed in the lid body, and a second hole is formed in a portion of the side surface of the rod, which is exposed to the inside of the air vent pit. A moving member moves along the rod from a first position at which the moving member does not cover the first hole and a second position at which the moving member covers the first hole.