Air Cleaner Shroud Guide for Fan Motor Contamination Control
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Solution Overview
Problem
Air cleaners with upper discharge structures face issues with foreign substances accumulating in the fan motor due to gravity, leading to performance deterioration and potential short circuits, especially when fluids are introduced through the discharge port.
Innovation Solution
An air cleaner design featuring a guide portion within the shroud that directs foreign substances introduced through the discharge port along the direction of gravity, preventing accumulation in the fan motor and ensuring they move towards the lower portion, where they can be easily removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high-speed fan motor is used to widen the purification area, then the air purification capacity is improved, but heat generation increases and requires additional heat discharge structure
Solution Approach 1:
The patent combines the heat discharge function with the existing motor housing structure by forming a heat discharge port in the housing that accommodates the fan motor. This merges the motor housing and heat dissipation system into a single integrated structure, allowing the high-speed fan motor to operate with effective cooling without requiring separate heat discharge components.
2Productivity
If the discharge port is formed on the upper side to widen purification area, then air discharge efficiency is improved, but foreign substances accumulate in the fan motor due to gravity
Solution Approach 1:
The patent extracts the fan motor from the direct airflow path by positioning it in a separate housing space that is communicatively connected to the discharge port but not directly in the main air flow. This separation allows the discharge port to be optimally positioned for air discharge efficiency while preventing foreign substances from directly entering and accumulating in the fan motor.
Solution Approach 2:
The housing acts as an intermediary structure between the discharge port and the fan motor. It provides a communication path for heat discharge and air flow while simultaneously serving as a protective barrier that prevents foreign substances introduced through the discharge port from directly contacting and accumulating in the fan motor, thus protecting motor reliability.
3Temperature
If the discharge port communicates with the motor for heat discharge, then heat dissipation is improved, but foreign substances can enter and cause short circuits
Solution Approach 1:
The patent applies local quality differentiation by creating distinct functional zones within the housing: one zone for heat discharge communication with the discharge port, and another zone for fan motor accommodation. The housing structure provides localized protection to the motor area while maintaining heat discharge pathways, allowing differential treatment of different regions to simultaneously achieve heat dissipation and electrical safety.
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
This design enhances the durability of the fan motor, prevents short circuits, and allows for easy removal of foreign substances or fluids, thereby maintaining the air cleaner's functionality and safety.
Implementation Method 1
a guide portion guiding foreign substances introduced through the discharge port along a direction of gravity
Data Source
AI summary
The present invention relates to an air cleaner, including a body forming an exterior; a suction portion formed on the body to suck air; a discharge portion formed on the body and discharging the air sucked through the suction portion; and a fan module provided in the body to form a flow of air flowing from the suction portion to the discharge portion, wherein the fan module includes: a driving portion forming a rotation shaft and generating power; a fan receiving the power from the driving portion and rotating about the rotation shaft; and a shroud accommodating the fan and provided between the suction portion and the discharge portion to guide the air sucked through the suction portion to the discharge portion, and the shroud includes a guide portion guiding foreign substances introduced through the discharge portion in a direction opposite to the flow of air.