Two-Fluid Nozzle Mist Control Under Valve Pressure Limits
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing spray systems using two-fluid nozzles to mix liquid and gas for mist creation face issues with pressure differences exceeding the allowable limits of the liquid flow control valve, leading to malfunctions such as opening and closing failures, and lack the capability for multilevel adjustment of mist concentration in indoor spaces.
Innovation Solution
A spray device with a two-fluid nozzle system that includes a pulse-driven liquid flow control valve, a controller, and a gas and liquid supply system, allowing for multilevel adjustment of mist concentration by controlling the valve opening degree through a pulse signal, and incorporates safety mechanisms like on-off valves, pressure reducing valves, and check valves to manage pressure differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a liquid flow control valve is used to adjust the spray volume in multiple levels, then the mist concentration can be adjusted in multiple levels, but the pressure difference between gas and liquid may exceed the allowable pressure difference of the valve, causing malfunction
Solution Approach 1:
A pressure reducing valve is introduced as an intermediary component in the liquid flow path. This mediator reduces the liquid pressure before it reaches the two-fluid nozzle, ensuring that the pressure difference between gas and liquid remains within the allowable range for the flow control valve, thus preventing valve malfunction while maintaining multilevel adjustment capability
Solution Approach 2:
The patent replaces direct mechanical pressure control of the liquid flow control valve with a pressure reducing valve that mechanically regulates pressure upstream. This substitution protects the flow control valve from excessive pressure differences by handling pressure regulation at an earlier stage in the fluid path
2Reliability
If the liquid pressure is reduced using a pressure reducing valve, then the pressure difference is controlled within allowable limits, but the system complexity increases
Solution Approach 1:
The pressure reducing valve is designed to perform multiple functions: it reduces liquid pressure to prevent valve malfunction, maintains stable liquid supply to the two-fluid nozzle, and works in conjunction with the flow control valve to enable multilevel mist concentration adjustment. This multi-functionality justifies the added component by consolidating several critical functions into a single element
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 system effectively adjusts mist concentration in multiple levels, preventing valve malfunctions and enabling various mist staging forms by synchronizing with external staging devices like lighting or projection systems, ensuring stable and responsive mist distribution.
Implementation Method 1
a two-fluid nozzle that sprays mist obtained by mixing liquid and gas and atomizing the liquid
Implementation Method 2
a liquid flow control valve which is provided in the spray-device-side liquid flow path between the two-fluid nozzle and the liquid valve, is driven by a pulse, and has a valve opening degree that is adjusted according to a pulse signal to control a flow rate of the liquid
Data Source
AI summary
A spray device (A) according to the present disclosure includes: a two-fluid nozzle (11) which sprays a mist (91); a spray-device-side gas flow path (12) for supplying a gas to the two-fluid nozzle (11); a gas supply source (17) which supplies the gas to the spray-device-side gas flow path (12); a spray-device-side liquid flow path (13) for supplying a liquid to the two-fluid nozzle (11); a liquid supply source (18) which supplies the liquid to the spray-device-side liquid flow path (13); a pulse-driven liquid flow control valve (14) having a valve opening degree that is adjusted according to a pulse signal to control the flow rate of the liquid in the spray-device-side liquid flow path (13); and a controller (30) which adjusts, in multiple levels, the concentration of the mist (91) sprayed from the two-fluid nozzle 11 by adjusting the valve opening degree of the liquid flow control valve 14.