Battery Compartment Labyrinth Seal for Liquid Protection
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Solution Overview
Problem
Existing high-pressure cleaning devices with battery-powered pumps face challenges in protecting the battery pack from liquid exposure and ensuring easy replaceability.
Innovation Solution
The design incorporates a battery compartment with a longitudinal insertion end and a protective element that creates a labyrinth seal, preventing liquid from entering the compartment. The compartment includes a projection that protrudes radially beyond the base body, ensuring the battery pack is protected from liquid ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the battery compartment is designed with a simple open structure for easy battery insertion, then the ease of operation is improved, but the protection from liquid ingress deteriorates
Solution Approach 1:
The patent introduces a radial dimension element (projection) that extends perpendicular to the insertion axis, creating a three-dimensional labyrinth structure. This projection protrudes radially beyond the base body in the circumferential direction, forming a barrier that liquid must navigate around. The protective element includes a protective surface arranged outside the base body with respect to the radial direction, creating multiple pathways that liquid must traverse, thus protecting the battery compartment while maintaining simple insertion motion along the insertion axis.
2Object-affected harmful factors
If the battery compartment includes protective structures like projections and protective elements, then the liquid protection is improved, but the device complexity increases
Solution Approach 1:
The protective structure is segmented into distinct functional elements: a projection that protrudes radially from the base body, and a separate protective element with a protective surface. This segmentation allows each component to perform a specific protective function while maintaining manufacturing simplicity. The projection creates the first barrier, and the protective element provides additional protection, with both elements being relatively simple geometric forms that can be manufactured independently and assembled easily.
Data Source
AI summary
A pressure washer includes a motor for a high-pressure pump, a battery pack to supply the motor with energy, a battery compartment for the battery pack and a housing. The battery compartment has an insertion opening through which the battery pack can be inserted into the battery compartment. The battery compartment has a base body. The pressure washer has a protective element for protecting the battery compartment from liquid, which is arranged radially outside the base body of the battery compartment and has a protective surface. The battery compartment has a projection which projects radially beyond the base body of the battery compartment. The protective surface points in an insertion direction. The pressure washer has at least one angular sector around the insertion axis in which the protective element axially overlaps the projection such that the projection lies in front of the protective surface with respect to the insertion direction.