Channel-Variable Circulating Fan to Separate Warm and Cold Air Streams
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Solution Overview
Problem
Existing cooling and heating circulating fans have a large air volume of hot air that is mixed with cold air, resulting in an unsatisfactory body feeling during heating due to their fixed structure, which fails to effectively separate warm and cold air streams.
Innovation Solution
A channel-variable cooling and heating circulating fan with an annular windshield ring that can axially move to control the radial air intake channel, allowing for the adjustment of air volume and separation of warm and cold air streams, featuring a tapered axial air channel and a detachable connection with the rear net cover to optimize air flow and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the radial air intake channel is opened to increase air volume, then the cooling effect is improved, but cold air mixes with warm air during heating, reducing body feeling comfort
Solution Approach 1:
The patent applies a movable annular windshield ring that can dynamically adjust between open and closed positions. When in the closed position, the windshield ring blocks the radial air intake channel to prevent cold air mixing during heating. When in the open position, it allows radial air intake for cooling. This dynamic adjustment mechanism resolves the contradiction by making the air intake structure adaptable to different operational modes (heating vs. cooling), thereby maintaining high air volume while preventing harmful cold air mixing during heating operations.
2Productivity
If the axial air channel is optimized to improve warm air flow, then heating efficiency is improved, but the structure complexity increases
Solution Approach 1:
The patent segments the air intake system into two distinct channels: a radial air intake channel and an axial air channel. The axial air channel is specifically optimized for warm air flow with a tapered design that narrows toward the fan blade, creating a focused air stream that improves heating efficiency. This segmentation allows independent optimization of each channel's function without increasing overall structural complexity, as the divided channels can be implemented using simple geometric modifications rather than complex mechanical systems.
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 solution effectively separates warm and cold air streams, improving user comfort by allowing precise control over air volume and temperature, enhancing the heating experience by preventing the mixing of cold air with warm air and reducing heating time.
Implementation Method 1
the axial air channel is a tapered air channel with a ventilation cross-section size which decreases gradually in a direction towards the fan blade
Data Source
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AI summary
Disclosed is a channel-variable cooling and heating circulating fan, comprising a rear net cover, a drive device, a heating component and a fan blade.The drive device and the heating component are arranged inside the rear net cover, and the drive device has a rotatable shaft going through the heating component to connect to the fan blade. The rear net cover is provided with a radial air intake channel of an annular shape thereon between the fan blade and the heating component, and a sealed annular air channel is formed on a front end of the rear net cover. The sealed annular air channel and the radial air intake channel are connected successively in the axial direction. The radial air intake channel is provided with an annular windshield ring. The annular windshield ring has an axial size greater than or equal to an axial size of the radial air intake channel, and is capable of axially moving into and out of a position where the radial air intake channel is located to control the opening and closing of the radial air intake channel.The annular windshield ring is arranged so that it can open and close the radial air intake channel torealizeswitch between cold air and warm air, thereby avoidingmixing cold air during warm air mode and enhancing the user's body feeling experience.