Movable Nozzle Pressure Structure for Low-Leakage Fluid Ejection
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Solution Overview
Problem
Existing nozzle devices experience air leakage when pushing the piston, leading to reduced air-use efficiency, and increasing pump capacity results in larger, heavier, and more expensive systems, affecting fluid efficiency regardless of the fluid type.
Innovation Solution
A nozzle device with a movable nozzle portion that uses a fluid receiving portion and surrounding-wall configuration to enhance fluid pressure and guide the fluid to the ejection port, reducing leakage and improving efficiency independently of pump specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the capacity of an air pump is increased to maintain pushing pressure, then the pressure stability is improved, but the device size, weight, and cost increase
Solution Approach 1:
The patent extracts the harmful leakage path from the system by introducing a sealing member that divides the cylinder into first and second cavities. This separation prevents fluid from leaking from the first cavity (where the piston is) to the second cavity (where the nozzle is), thereby maintaining pushing pressure without requiring a larger pump.
Solution Approach 2:
The sealing member acts as an intermediary element between the piston and nozzle portions. It prevents direct communication between the two cavities, blocking the leakage path and allowing the system to maintain pressure with a smaller, more efficient pump.
2Stress or pressure
If the capacity of an air pump is increased to maintain pushing pressure, then the pressure stability is improved, but the installation space requirement increases
Solution Approach 1:
The patent removes the need for a large-capacity pump by extracting the leakage problem from the system through the sealing member. This allows the use of a smaller pump that occupies less installation space while still maintaining the required pushing pressure.
3Stress or pressure
If the capacity of an air pump is increased to maintain pushing pressure, then the pressure stability is improved, but the device cost increases
Solution Approach 1:
The patent extracts the root cause of high costs (the need for a large-capacity pump) by introducing a sealing member that eliminates fluid leakage. This allows the system to maintain pushing pressure with a more cost-effective, smaller pump.
4Loss of energy
If a sealing member is introduced to prevent fluid leakage, then the fluid-use efficiency is improved, but the device complexity increases
Solution Approach 1:
The sealing member is designed to be automatically positioned and secured within the cylinder through the existing structural features (projections and grooves). The system uses its own operational movements to maintain the sealing function without requiring additional control mechanisms or complex assembly procedures.
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 nozzle device improves fluid-use efficiency by utilizing fluid pressure to move the nozzle portion to the usage position, reducing leakage and maintaining efficiency without increasing pump size or weight, while allowing for scented fluid ejection for driver and passenger stimuli.
Implementation Method 1
a fluid receiving portion that is formed in such a manner as to extend outward than a downstream side and in such a manner as to be inclined in a direction in which the movable nozzle portion moves to a usage position
Data Source
AI summary
A nozzle device 1 includes a main body 10 that is formed of a main-body first member 11 and a main-body second member 22 and that has an internal accommodation space 21 in which members are accommodated, a movable nozzle portion 30 that is accommodated in the accommodation space 21, and a coil spring 2 that is disposed between the movable nozzle portion 30 and the main body 10. When air is supplied to a main-body flow-path portion 23 from below, the flow path of the air is changed by the Coanda effect in an air guiding portion 27 such that the air flows along the air guiding portion 27, and the air flows into a gap between an air receiving portion 36 and the air guiding portion 27 and is guided to the air receiving portion 36. The air is pressurized in the air receiving portion 36 and pushes up the movable nozzle portion 30.