Backpack Battery Barrel Drain Layout for Liquid Leak Protection
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Solution Overview
Problem
Existing backpack sprayers face issues with liquid leakage into the battery mounting box, which can cause adverse effects on electrical components.
Innovation Solution
A backpack type electric working machine with a storage case that includes a tubular barrel, a drain hole, and a connection terminal positioned opposite the opening, allowing liquid to be discharged smoothly, preventing adverse effects on electrical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery mounting box is sealed to prevent liquid entry, then electrical components are protected, but manufacturing cost increases due to additional sealing members
Solution Approach 1:
The harmful liquid is extracted from the battery mounting box through the drain hole, removing the threat to electrical components without requiring sealing structures. This extraction approach replaces the need for preventive sealing with active liquid removal.
Solution Approach 2:
The drain hole is positioned to create a liquid flow path that prevents liquid from reaching the connection terminal before the liquid can cause damage. The downward slope and drain hole placement create a preliminary protective action that guides liquid away from sensitive components.
2Reliability
If the connection terminal is positioned away from the opening, then liquid exposure is reduced, but device complexity increases
Solution Approach 1:
The connection terminal is asymmetrically positioned on the inner side of the barrel opposite the opening, while the drain hole is positioned on the inner side of the bottom surface. This asymmetric arrangement creates an effective liquid drainage path without requiring complex additional structures.
Solution Approach 2:
The protection strategy moves from a two-dimensional planar arrangement to a three-dimensional spatial arrangement, utilizing the vertical dimension with the downward slope and drain hole positioned on the bottom surface to create a liquid flow path that naturally directs liquid away from the connection terminal.
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
Prevents adverse effects on electrical components by efficiently discharging liquid from the storage case, reducing the need for sealing members and lowering manufacturing costs.
Implementation Method 1
a drain hole opening downward from the barrel
Data Source
AI summary
A backpack type electric working machine adapted to be used by attaching a battery is provided. The electric working machine comprises: a working machine body including a storage case configured to store the battery and a connection terminal configured to be electrically connected to the battery; and a back carrying part attached to the working machine body and used by an operator to carry the working machine body on his/her back, the storage case including a tubular barrel, a drain hole opening downward from the barrel, and an opening configured to allow the battery to be introduced to an inner side of the barrel, the connection terminal being arranged on an inner side of the barrel opposite the opening, the drain hole being provided between the connection terminal and the opening.