Venturi Mixing Circuit for Adjustable Detergent Pre-Spray
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Solution Overview
Problem
Current injection/extraction cleaning machines cannot adjust detergent concentration during use, limiting their ability to perform specific treatments like pre-spray, which requires a more concentrated solution for effective surface preparation before cleaning.
Innovation Solution
An instantaneous mixing device with a hydraulic circuit that includes separate tanks for water and detergent, a mixing element utilizing the Venturi effect, and adjustable throttle elements and valves to achieve varying detergent concentrations, allowing for both standard washing and pre-spray solutions with higher detergent concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single tank containing mixed water and detergent is used, then the machine structure is simple, but the detergent concentration cannot be adjusted during use
Solution Approach 1:
The single tank is divided into two separate tanks: one for water and one for detergent. This segmentation allows independent control of each component, enabling adjustable detergent concentration by controlling the mixing ratio between the two tanks through the hydraulic system.
Solution Approach 2:
The hydraulic pump system serves multiple functions: it can pump water from the water tank, pump detergent from the detergent tank, and control the mixing ratio through throttle elements. This multi-functionality allows the same hydraulic circuit to handle both pure water spray and adjustable concentration washing solutions.
2Reliability
If a pre-spray function with concentrated solution is added, then the cleaning efficacy is improved, but the device complexity increases
Solution Approach 1:
The existing hydraulic pump and circuit are utilized for both pre-spray and washing functions. By controlling the valve positions and throttle elements, the system can deliver concentrated detergent solution for pre-spray or diluted solution for washing, eliminating the need for separate pre-spray equipment.
Solution Approach 2:
The system changes the concentration parameter of the detergent solution by adjusting the mixing ratio controlled by throttle elements and valves. For pre-spray, a higher concentration is delivered; for washing, a diluted concentration is provided, all through the same hydraulic system.
3Adaptability or versatility
If external pre-spray equipment is used, then concentrated solution can be applied, but the equipment portability is reduced
Solution Approach 1:
The pre-spray function is merged with the main washing machine body. The hydraulic pump, tanks, and control valves are integrated into a single portable unit, combining both pre-spray and washing capabilities in one device, eliminating the need for separate external pre-spray equipment.
4Ease of operation
If detergent is pre-mixed in the tank, then the machine is ready to use, but detergent waste occurs when concentration needs to be changed
Solution Approach 1:
The mechanical pre-mixing system is replaced with a hydraulic mixing system. Water and detergent are pumped separately and mixed in controlled proportions through the hydraulic circuit and throttle elements, allowing dynamic adjustment of concentration without wasting pre-mixed detergent.
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
Enables flexible detergent dilution and automatic supply of a more concentrated solution for pre-spray, reducing the need for external equipment and minimizing detergent waste, while maintaining effective cleaning efficacy across different flow rates.
Implementation Method 1
a mixing element (14) with a Venturi effect
Data Source
AI summary
The present invention relates to an instantaneous mixing device for injection/extraction cleaning machines and in particular to an instantaneous mixing device with a pre-spray functionality of the type equipped with at least one washing accessory (13) and/or at least one pre-washing accessory (30) connected at the outlet to a hydraulic circuit (20), the device (10) comprising:at least one spray pump (12) connected to the hydraulic circuit (20);at least one tank for water (15) and at least one tank for a chemical product (16), connected to the hydraulic circuit (20);at least one mixing element (14) with a Venturi effect connected downstream of the at least one water tank (15) and at least one tank for a chemical product (16).The at least one pre-washing element (30) preferably comprises a spray hole having greater dimensions with respect to the hole of the spray nozzle of the at least one washing accessory (13).