Spray Gun Electrical Housing Segmentation for High-Pressure Cleaning
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Solution Overview
Problem
Existing spray guns for high-pressure cleaning devices are costly to manufacture and maintain, and are prone to faults due to complex electrical components that can be affected by liquid exposure.
Innovation Solution
The spray gun features a splash-proof electrical housing that isolates current-carrying components, allowing for pre-assembly and testing before integration, with wireless pressure detection and a standby mode to reduce energy consumption and maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrical components are integrated into the spray gun housing, then the spray gun can display operational information and control functions, but the complexity of manufacturing and assembly increases
Solution Approach 1:
The spray gun is divided into distinct functional modules: a valve assembly housing containing the valve mechanism, and a separate electrical unit housing containing all electrical components (battery, display, control elements). This segmentation allows each module to be manufactured, tested, and assembled independently, reducing overall manufacturing and assembly complexity while maintaining full functional capability.
2Measurement precision
If electrical components are exposed to the liquid environment, then the spray gun can monitor and display liquid pressure and flow rate, but the reliability of the electrical system decreases due to moisture and liquid exposure
Solution Approach 1:
The electrical unit is housed in a separate liquid-tight enclosure from the liquid flow path. This physical separation allows pressure sensors to monitor liquid parameters while the electrical components (battery, display, electronics) remain protected from moisture and liquid exposure, ensuring both measurement precision and electrical system reliability.
Solution Approach 2:
A pressure sensor acts as an intermediary element that detects liquid pressure through a sealed interface and transmits this information to the electrical display system without requiring direct exposure of electrical components to the liquid environment. This mediator enables accurate pressure monitoring while maintaining electrical system integrity.
3Loss of information
If the electrical system remains active during standby, then the display can show information continuously, but energy consumption increases
Solution Approach 1:
The electrical display system operates in periodic cycles rather than continuously. During active use, the display shows information and controls are responsive. During standby periods, the system enters a low-power state with reduced display activity, automatically waking when the trigger is pulled or after a set time interval. This periodic operation significantly reduces battery energy consumption while maintaining information availability when needed.
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
This design simplifies production and assembly, reduces fault susceptibility, and lowers maintenance costs by keeping electrical components dry and only activating them when needed, ensuring efficient operation and extended device lifespan.
Implementation Method 1
The pressure sensing device is arranged outside the electrical housing in the gun housing and is wirelessly coupled to a sensor element of the electrical device located in the electrical housing
Data Source
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AI summary
The invention relates to a spray gun (10; 200) for a high-pressure cleaning appliance, with a gun casing (12), in which there is arranged a valve (26), wherein the valve (26) has a through duct (34) which extends from a valve inlet (30) to a valve outlet (32), and wherein the valve has a closure body (36) which, in a closed position, bears in a fluid-tight manner against a valve seat (56) and which can be moved, with the aid of a hand lever (48) mechanically coupled to the closure body (36), into an open position spaced apart from the valve seat (56), and with an electric apparatus (100; 202) which has an electric display device (140; 208) and at least one battery (114; 234). In order to refine the spray gun such that it can be produced and assembled in a cost-effective manner, is insensitive to disturbances and is maintenance-friendly, it is proposed according to the invention that the electric apparatus (100; 202) has an electric casing (102; 204) which is sealed against sprayed water and forms a sub-unit which can be handled independently, wherein all of the current-carrying components of the spray gun are arranged in the electric casing (102; 204) and are separated galvanically from the remaining components of the spray gun (10; 200).