Blower Motor Ring Cover Labyrinth Water Seal
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Solution Overview
Problem
Existing blower devices fail to effectively prevent water from entering the blower motor, leading to rust formation and insulation deterioration, especially in high-power motors with exposed components and increased rotation speeds.
Innovation Solution
A blower device design featuring a motor holder with an annular groove and a ring cover that forms a labyrinth structure to redirect and prevent water entry, using a sleeve portion to block water paths and a flange portion to guide water away from the motor holder, combined with a multi-blade fan to minimize mist entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an open blower motor is used to enhance heat dissipation, then heat dissipation performance is improved, but water resistance deteriorates
Solution Approach 1:
The motor holder is divided into multiple functional regions: an exposed upper portion for heat dissipation and a covered lower portion for water protection. The ring cover segments the motor housing into water-exposed and water-protected zones, allowing the motor to maintain open structure for cooling while protecting critical components from water
Solution Approach 2:
The ring cover acts as an intermediary structure between the open motor components and the water environment. It provides mechanical protection and water blocking without compromising the open structure needed for heat dissipation, serving as a mediator that reconciles the conflicting requirements of exposure and protection
2Productivity
If the rotation speed of the blower motor is increased to achieve high-power performance, then productivity is improved, but water resistance deteriorates
Solution Approach 1:
The motor holder structure is segmented to provide different protection levels for different operational requirements. The ring cover creates a protected zone that allows high-speed operation while maintaining water resistance, separating the high-performance rotation function from water exposure risks
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 design significantly limits water entry into the blower motor, preventing rust and insulation issues, even in high-power applications with exposed components, by creating a labyrinth structure that redirects and blocks water paths effectively.
Implementation Method 1
A labyrinth structure is formed by inserting the annular skirt portion into the annular groove and the labyrinth structure lying in the water incoming route prevents water from coming into the blower motor
Implementation Method 2
Water that has reached a top of the ring cover has to surmount the sleeve portion provided to erect like a wall. Hence, water reaching as far as the blower motor can be limited by the sleeve portion
Data Source
AI summary
A blower device includes: a ring cover attached to a motor holder along an opening to cover a motor top; and a blower fan having a rotation center to which a rotation shaft is coupled. The blower fan has a lower end portion that is adjacent to the motor holder. The ring cover includes: a sleeve portion covering the motor top; a flange portion extending continuously from a lower end of the sleeve portion to cover a surface of the motor holder; and a skirt portion formed along a periphery of the flange portion in an annular shape. The skirt portion with the annular shape is pressed into an annular groove of the motor holder.