Pressure Washer Housing Cooling With Serpentine Water Channels
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Solution Overview
Problem
Current pressure washers face issues with heat dissipation from motors and electronics, leading to reduced performance and potential overheating failures due to ineffective cooling systems.
Innovation Solution
A pressure washer design that channels low-pressure water through serpentine paths in a thermally conductive housing to absorb heat from both the motor and electronics, using end caps with optional cavities to enhance heat transfer, eliminating the need for separate cooling components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If separate cooling components are added to cool the motor and electronics, then the heat dissipation effectiveness is improved, but the device complexity increases
Solution Approach 1:
The patent merges the cooling function into the existing housing structure by incorporating cooling channels directly into the housing that surrounds the motor and electronics. This integration eliminates the need for separate cooling components while maintaining effective heat dissipation, as the housing itself becomes the heat transfer medium.
Solution Approach 2:
The housing serves multiple functions: it provides structural support, contains the motor and electronics, and simultaneously acts as a heat transfer medium through integrated cooling channels. This multi-functionality reduces overall device complexity while maintaining cooling effectiveness.
2Device complexity
If cooling components are integrated into the housing, then the device complexity is reduced, but the heat transfer surface area may be insufficient
Solution Approach 1:
The housing is segmented into multiple cooling channels that distribute water flow throughout the structure. This segmentation increases the total heat transfer surface area by creating multiple contact paths between the cooling fluid and the motor/electronics components, while maintaining the integrated housing design.
Solution Approach 2:
The cooling channels are arranged in a three-dimensional serpentine pattern within the housing, maximizing the heat transfer surface area by utilizing spatial dimensions rather than simply expanding the housing exterior. This allows sufficient heat transfer area within the compact integrated structure.
3Temperature
If water flow path is extended to cool both motor and electronics, then the cooling coverage is improved, but the pressure drop increases
Solution Approach 1:
The serpentine cooling channel design creates periodic flow direction changes that maintain turbulent flow conditions, enhancing heat transfer efficiency. The periodic U-turns in the serpentine path allow the water to repeatedly contact different sections of the motor and electronics, improving cooling coverage while managing pressure drop through optimized turn radii.
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
Effectively cools both the motor and electronics passively using the same water flow, enhancing performance and extending component life without active cooling systems.
Implementation Method 1
low-pressure water, which is subsequently pressurized to a high pressure for cleaning, is first directed through channels in the housing to absorb and remove heat generated by the motor and the electronics. The housing is fabricated from a thermally conductive material
Implementation Method 2
the channels are arranged in a serpentine configuration around the motor so that water flows back and forth across the housing surface, transferring heat away
Data Source
AI summary
A pressure washer is provided in which the low-pressure water supplied to the unit is routed through thermally conductive channels in the housing to absorb heat generated by the motor and electronics before being pressurized for cleaning. The channels are arranged in a serpentine configuration around the motor, with optional cavities in the end caps to increase heat transfer surface area and improve cooling efficiency. Heat from the motor is transferred to the housing and into the water, while heat from the electronics is conducted to the second end cap and into the same water flow. The heated water is then delivered to the pump, where it is pressurized for discharge through the outlet. This design enables efficient cooling of the motor and electronics using the pressurized water, eliminating the need for a separate cooling system.