High-Pressure Cleaner Electronics Housing for Motor Splash Protection

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Solution Overview

Problem

High-pressure cleaning devices face challenges in protecting their motors and electronics from liquid splashes, leading to potential damage and reduced operational reliability.

Innovation Solution

A design that incorporates a waterproof electronics housing covering at least partially or completely around the motor receiving area, combined with a cooling air inlet system to prevent splash water penetration and facilitate efficient cooling, ensuring robust and long-lasting operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the electronics housing is designed to provide splash protection for the motor mounting area, then the protection level against liquids is improved, but the cooling efficiency may be compromised due to restricted air flow paths

Engineering Contradiction:
Improveprotection level against liquidsVSAvoidcooling efficiency
Core Design Contradiction:
ReliabilityVSTemperature

Solution Approach 1:

The housing is segmented into distinct functional zones: a motor mounting area with splash protection, an electronics housing with IPX5 rating, and dedicated cooling air inlet areas. This segmentation allows each zone to be optimized independently - the splash protection zones prevent liquid ingress while the cooling inlet zones maintain adequate air flow paths for thermal management

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different protection levels are applied to different areas of the housing. The electronics housing receives IPX5 splash protection while the motor mounting area has its own splash protection design. Cooling air inlet areas are specifically positioned and sized to maintain thermal management effectiveness without compromising the splash protection integrity of other zones

Inventive Principle:
Principle #3Local quality

2Reliability

If the electronics housing completely covers the motor mounting area for maximum protection, then the splash protection is improved, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:
Improvesplash protectionVSAvoidhousing structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The housing structure serves multiple functions simultaneously: it provides splash protection for both the motor mounting area and electronics, structures the internal layout, and defines cooling air inlet paths. By integrating these functions into a unified housing design rather than adding separate components, the overall device complexity is reduced while maintaining comprehensive protection

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The electronics housing is designed to cover at least partially or completely the motor mounting area, providing more protection than the minimum required. This partial or complete coverage approach ensures adequate splash protection without requiring overly complex structures, as the housing naturally extends to provide coverage

Inventive Principle:
Principle #16Partial or excessive action

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 solution provides enhanced protection against liquids, particularly water, and effective cooling, resulting in a robust, reliable, and long-lasting high-pressure cleaning device with improved splash protection and ease of maintenance.

Implementation Method 1

a cooling air inlet area for the motor mount be arranged on the side where the electronics housing at least partially covers the motor mounting area

Methodology Applied
Scientific EffectConvection: Convection

Data Source

PatentEP4331735A1Cleaning device and cleaning apparatus
Publication Date: 2024.03.06 ROBERT BOSCH GMBH
  • EP4331735A1 patent drawingFigure 1
  • EP4331735A1 patent drawingFigure 2
  • EP4331735A1 patent drawingFigure 3

AI summary

The invention relates to a cleaning device (10), in particular a high-pressure cleaner device, with a motor mount (12) which defines a motor mounting area (14) for receiving a motor (16), and with at least one electronics housing (18) for receiving electronics (20). It is proposed that the electronics housing (18) is designed as liquid protection, in particular splash protection, for the motor mounting area (14) and at least partially covers at least one side (22) of the motor mounting area (14).