Backpack Battery Barrel Drainage Layout for Liquid-Safe Connection
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Solution Overview
Problem
Liquid ingress into the battery mounting box of a backpack type sprayer can adversely affect electrical components such as batteries and connection terminals.
Innovation Solution
The design includes a storage case with a tubular barrel, downward-facing drain holes, and a guide passage to efficiently discharge liquid away from the connection terminal, reducing the risk of adverse effects on electrical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the battery mounting box is designed with a horizontal mounting opening and connection terminal on the upper side, then the battery can be easily installed and connected, but liquid can enter the battery mounting box through the mating surface and adversely affect electrical components
Solution Approach 1:
The connection terminal is repositioned from the upper side to the lower side of the battery mounting box, inverting the conventional arrangement. This allows liquid to drain away from the connection terminal through the drain hole, preventing liquid damage while maintaining ease of connection
Solution Approach 2:
The drain hole is added to extract and remove liquid from the battery mounting box interior, separating the liquid drainage function from the battery mounting function. This extraction of liquid prevents it from reaching electrical components
2Ease of operation
If the connection terminal is positioned on the upper side of the battery mounting box, then electrical connection is facilitated, but liquid entering the box can directly contact the connection terminal and cause short circuits or corrosion
Solution Approach 1:
The connection terminal position is inverted from upper to lower, placing it in a location where liquid naturally drains away. This inversion protects the electrical component from liquid contact while maintaining connection functionality
Solution Approach 2:
The drain hole acts as an intermediary element between the battery mounting box interior and exterior, providing a dedicated liquid egress path that prevents liquid from reaching 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 or suppresses short circuits and corrosion by effectively discharging liquid from the storage case, simplifying the design and reducing component count and manufacturing costs.
Implementation Method 1
a drain hole opening downward from the barrel
Data Source
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AI summary
According to an aspect of the present disclosure, 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.