Foam Generator Agitating Nozzle for Carwash
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Solution Overview
Problem
Existing foam generators for automated vehicle washing units produce inefficient and unsatisfactory foaming action, leading to inadequate dirt penetration and customer dissatisfaction, as they often require excessive chemicals, air, and frequent maintenance, and result in wet and compressed foam that does not adhere well to vehicle surfaces.
Innovation Solution
A foam generating system comprising a foam generator connected to air, water, and detergent sources, featuring a full cone nozzle and an agitating nozzle with a propeller-shaped flow guide that spins and accelerates the foaming fluid, producing a richer, more evenly distributed foam spray pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mixing devices are used to mix water and detergent, then mixing can be achieved, but the foam produced is wet and compressed, requiring frequent maintenance and excessive chemicals
Solution Approach 1:
The patent extracts the mixing function from complex traditional devices (pumps, mixing tanks, turbulence-generating structures) and implements it through a simple venturi-based injection system combined with a spinning nozzle. This extraction eliminates the need for frequent maintenance while reducing chemical consumption by achieving efficient mixing through fluid dynamics rather than mechanical means.
Solution Approach 2:
The patent replaces mechanical mixing systems (pumps, agitators, mixing tanks) with a fluid-dynamics-based system using venturi injection and spinning nozzle aerodynamics. This substitution eliminates mechanical wear and maintenance while producing drier, more stable foam with reduced chemical requirements.
2Duration of action of moving object
If unfoamed water-detergent mixture is applied to the vehicle, then application is simple, but the mixture runs off quickly and does not provide adequate penetration of dirt
Solution Approach 1:
The patent changes the physical state of the water-detergent mixture from liquid to foam through the venturi injection and spinning nozzle mechanism. This parameter change (phase transformation) increases adherence time and dirt penetration while the simple device structure avoids increasing complexity.
3Quantity of substance
If pumps and mixing tanks are used to produce foam, then mixing can be achieved, but the devices are expensive and require large amounts of chemicals and air
Solution Approach 1:
The patent uses pneumatic-hydraulic principles through the venturi injection system and spinning nozzle to generate foam. Air is drawn in through the venturi effect as water and detergent pass through, creating efficient foam without requiring large volumes of chemicals or complex mechanical mixing equipment.
Solution Approach 2:
The patent changes the physical state of the water-detergent mixture from liquid to foam through the venturi injection and spinning nozzle mechanism. This parameter change (phase transformation) increases adherence time and dirt penetration while the simple device structure avoids increasing complexity.
4Productivity
If venturi or similar devices are used to mix soap and water in self-service car washes, then mixing can be achieved, but the mixture contains very little cleansing foam and requires successive uses
Solution Approach 1:
The patent performs preliminary foaming action within the device itself through the venturi injection and spinning nozzle mechanism before the mixture reaches the user. This preliminary action ensures high foam concentration and cleansing effectiveness, eliminating the need for successive washes and improving overall productivity.
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 generates a superior, homogenous foam spray that adheres longer to vehicle surfaces, improving cleaning effectiveness and reducing maintenance needs by producing a consistent and efficient foam flow.
Implementation Method 1
An agitating nozzle is disposed in the output of the input nozzle, the agitating nozzle spins and accelerates the foaming fluid flowing from the foam generator
Implementation Method 2
the agitating nozzle spins and accelerates the foaming fluid flowing from the foam generator to an output nozzle. Because of the spinning and the acceleration of the foaming fluid, the foam generator is more evenly filled
Implementation Method 3
where the water-detergent mixture is applied in foam form it remains as a result of surface tension for longer periods
Data Source
AI summary
A foam generating system for an automated carwash contains a foam generator for connecting to an air source, a water source and a detergent source. The foam generator has an input and an output outputting a foaming fluid formed from air from the air source, water from the water source, and a detergent from the detergent source. A detergent/water receiving input nozzle is attached to an input side of the foam generator. An agitating nozzle is disposed in the output of the input nozzle. The agitating nozzle spins and accelerates the foaming fluid flowing through the foam generator where it eventual is output by an output nozzle. The agitating nozzle outputs a homogenous full cone pattern of foaming fluid to be turned into foam.