Low-Profile Ventilation Assembly With Scroll Blower and Secure Mounting
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Solution Overview
Problem
Modern ventilating exhaust fans are bulky due to the size of their motor and fan wheel, making them inefficient in terms of space and potentially noisy, while also lacking in secure mounting options for compact installations.
Innovation Solution
A compact ventilation exhaust fan design featuring a low-profile main housing with spinner clamps for secure anchoring and a duct connector assembly with a damper flap to control backflow, allowing for efficient fluid flow and reduced noise, and a blower assembly with a scroll-shaped motor and blower wheel for quiet operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor and fan wheel size are increased to meet performance demands, then ventilation performance is improved, but the physical size and bulkiness of the exhaust fan increases
Solution Approach 1:
The patent employs a scroll-shaped motor housing and curved blade design in the fan wheel. The scroll shape allows for compact packaging of the motor while maintaining adequate clearance for magnetic fields, and the curved blades optimize airflow patterns to achieve high ventilation performance in a smaller overall package.
Solution Approach 2:
The patent integrates the fan wheel directly within the scroll-shaped motor housing, with the fan wheel nested inside the scroll cavity. This nesting arrangement eliminates separate housings and mounting structures, significantly reducing the overall physical size while maintaining all necessary functional clearances.
2Volume of moving object
If the exhaust fan size is reduced for compact installation, then space efficiency is improved, but secure mounting options become limited
Solution Approach 1:
The patent combines the mounting clamp function directly into the scroll-shaped motor housing structure. The scroll housing incorporates integrated clamp arms that extend outward to engage with mounting surfaces, eliminating the need for separate mounting brackets or hardware while ensuring secure installation of the compact unit.
3Object-affected harmful factors
If the motor and fan wheel are made compact, then noise and vibration are reduced, but the ability to meet ventilation performance demands is compromised
Solution Approach 1:
The scroll-shaped motor housing and curved fan blades create smooth, continuous airflow paths that minimize turbulence and vortex formation. This curved geometry reduces air resistance and allows the compact motor to move air efficiently with less vibration and noise while maintaining high ventilation performance.
Solution Approach 2:
The patent optimizes the blade angle, scroll spiral pitch, and motor rotational speed parameters to achieve maximum airflow efficiency in a compact configuration. By carefully tuning these parameters, the small motor generates sufficient airflow velocity to meet ventilation demands while operating quietly with minimal vibration.
Data Source
AI summary
Embodiments of the invention provide a ventilation assembly comprising a main housing adapted for installation into standard 2′×4′ wall or ceiling construction within a building or space. The main housing can include a fluid inlet through which fluid is received within the main housing, and a fluid outlet through which fluid exits the main housing. The ventilation assembly can be installed in place of an existing ventilation exhaust fan assembly, or can be installed in a space where no ventilation assembly has previously existed. The main housing can provide support to a blower assembly, including a scroll and a blower wheel positioned within the scroll. A motor may be nestled within the scroll and coupled to the blower wheel. Electrical power can be supplied to the motor to cause the motor to rotate the blower wheel to generate a flow of fluid out of the fluid outlet.