Upright and Inverted Discharge Unit with Valve-Seating Prevention
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Solution Overview
Problem
The existing units for upright and inverted attitudes in discharge devices face issues where the switching valves are pressed against their respective valve seats due to decompression, hindering smooth introduction of content liquid into the cylinder part during both upright and inverted attitudes.
Innovation Solution
The unit includes prevention parts to prevent switching valves from entering paths leading to the relay port, using prevention parts and escape recesses to guide and accommodate switching valves away from valve seats, ensuring smooth liquid introduction by preventing contact with valve seats during decompression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If switching valves are used to cut off communication between inlets and relay port during upright/inverted attitudes, then liquid flow control is improved, but the valves may be pressed against valve seats due to decompression, causing smooth introduction of content liquid to deteriorate
Solution Approach 1:
The patent divides the single switching valve into two separate switching valves (first switching valve for upright attitude, second switching valve for inverted attitude). Each valve is responsible for controlling liquid flow in a specific attitude, preventing the other valve from being affected by decompression forces. This segmentation resolves the contradiction by ensuring that only the active valve is exposed to liquid flow while the inactive valve is protected from decompression-induced pressing against its valve seat.
Solution Approach 2:
The patent introduces a decompression port as an intermediary element that provides a separate decompression path for the inactive switching valve. This mediator allows decompression to occur without forcing the inactive valve against its valve seat, thereby maintaining smooth liquid introduction capability while preserving the flow control function of both valves.
2Stability of the object's composition
If decompression is exerted on switching valves through relay port during liquid introduction, then pressure equalization is improved, but the switching valves may be pressed against valve seats, causing liquid introduction smoothness to deteriorate
Solution Approach 1:
The decompression function is segmented into two separate paths, one for each switching valve. The first decompression path serves the first switching valve during upright attitude, while the second decompression path serves the second switching valve during inverted attitude. This segmentation allows pressure equalization to occur without causing valves to press against their seats, maintaining liquid introduction efficiency.
Solution Approach 2:
Separate decompression ports act as intermediary channels that provide controlled decompression pathways. These intermediaries allow pressure equalization to occur gradually and controllably, preventing sudden pressure differentials that would force valves against their seats, thus maintaining smooth liquid introduction while achieving pressure balance.
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
This configuration allows for seamless liquid introduction into the cylinder part by preventing valves from being pressed against valve seats, ensuring efficient operation in both upright and inverted attitudes.
Implementation Method 1
decompression in the cylinder part is exerted on the second switching valve through the relay port
Data Source
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AI summary
A unit for upright and inverted attitudes (1) includes an upright-attitude inlet (63a), an inverted-attitude inlet (65a), a relay port (64c), a first switching valve (61), a second switching valve (62), and at least one of a first prevention part (75) and a second prevention part, the first prevention part (75) being configured to prevent a second switching valve (62) from entering a first path (L1) through which a content liquid is directed toward the relay port from the upright-attitude inlet (63a) during an upright attitude of a discharge device (10), and the second prevention part being configured to prevent a first switching valve (61) from entering a second path (L2) through which a content liquid is directed toward the relay port (64c) from the inverted-attitude inlet (65a) during an inverted attitude of the discharge device (10).