Leak-proof Foam Spraying Can Duckbill Valve Pressure Equalization
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Solution Overview
Problem
Existing foam spraying cans face issues with pressure equalization, leading to potential leaks when the can is inverted, due to the design of air inlets which allow cleaning agents to escape.
Innovation Solution
A duckbill valve is mounted in the liquid tank lid, allowing air to enter and equalize pressure when the can is in use, while closing to prevent leaks when the can is inverted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If an air inlet is provided in the liquid tank to equalize pressure, then the pressure equalization function is improved, but the cleaning agent leaks outward when the spraying can is inverted
Solution Approach 1:
A duckbill valve is introduced as an intermediary component between the liquid tank and the external environment. The valve allows air to enter the liquid tank to equalize pressure while preventing cleaning agents from leaking outward when the can is inverted, thus resolving the contradiction between pressure equalization and substance loss
Solution Approach 2:
The duckbill valve changes the flow parameter of air through its one-way valve mechanism. It permits air flow in one direction (into the liquid tank) while blocking flow in the opposite direction (outward leakage), enabling pressure equalization without cleaning agent loss
2Loss of substance
If a duckbill valve is mounted in the liquid tank lid, then the cleaning agent leakage is prevented, but the device complexity increases
Solution Approach 1:
The duckbill valve is a simple, inexpensive one-way valve component that can be easily manufactured and installed. Its straightforward design with minimal moving parts reduces overall device complexity while effectively preventing cleaning agent leakage
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 duckbill valve effectively prevents the leakage of cleaning agents or disinfectants, ensuring the liquid tank remains sealed even when tilted or inverted, enhancing user confidence and product reliability.
Implementation Method 1
the pressure in the liquid tank will decrease, and the pressure difference between the inside and outside will easily lead to the problem of deformation and damage to the liquid tank. Therefore, in the prior art, the liquid tank is generally provided with an air inlet to equalize the pressure inside the liquid tank
Implementation Method 2
a duckbill valve is mounted in the liquid tank lid, allowing air to enter and equalize pressure when the can is in use, while closing to prevent leaks when the can is inverted
Data Source
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AI summary
The present disclosure discloses a leak-proof foam spraying can, characterized in that it includes a liquid tank, a liquid tank lid and a duckbill valve, wherein the top of the liquid tank is provided with a liquid injection port, the liquid tank lid is engaged on the liquid injection port, the liquid tank lid is provided with a mounting hole which penetrates through the liquid tank lid along the vertical direction from the top to the bottom, and the duckbill valve is mounted in the mounting hole and the opening of the duckbill valve faces downward. The present disclosure has the following advantageous effects: by mounting a duckbill valve in the liquid tank lid, the duckbill valve can be opened when the spraying can is in use and suck air to equalize the pressure, or it can be closed when the spraying can is inverted to avoid leaking cleaning agent or disinfectant.