Fan and method and device for controlling the fan
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Solution Overview
Problem
Conventional fan designs with fixed support rods and fan heads have a limited air blowing range, affecting user comfort by not effectively directing airflow.
Innovation Solution
A method and device that utilize a swingable support rod between the fan base and head, controlled by a motor-driven gear system, which determines the current swing angle and distance to the user, calculating an axial rotation angle for the fan head to optimize airflow direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a fixed support rod and fan head structure is used, then the device complexity is reduced, but the air blowing range is limited
Solution Approach 1:
The support rod is made swingable instead of fixed, allowing it to change position dynamically. A motor drives the support rod to swing between different angles, enabling the fan head to cover a larger air blowing range while maintaining a relatively simple overall structure.
Solution Approach 2:
The fan head is enabled to rotate axially in addition to the support rod's swinging motion, adding a rotational dimension to the positioning capability. This allows the fan to direct airflow more precisely in multiple directions, expanding the effective air blowing range without proportionally increasing structural complexity.
2Adaptability or versatility
If the fan head is fixed, then the device complexity is reduced, but the ability to direct airflow to the user is limited
Solution Approach 1:
The fan head is made rotatable on the support rod with an axial rotation mechanism. This dynamic adjustment capability allows the fan head to continuously track and direct airflow toward the user's position, significantly improving adaptability while adding only a rotational actuation mechanism.
Solution Approach 2:
The control system determines the user's position relative to the fan and calculates the required axial rotation angle based on the support rod's swing angle and distance measurements. This feedback loop enables the fan head to automatically adjust its orientation to maintain optimal airflow direction toward the user.
Data Source
AI summary
The present disclosure relates to a fan and a method and device for controlling the fan. The method includes controlling, via a support rod control device, a swinging motion of the swingable support rod, wherein the support rod control device is provided between the swingable support rod and the fan base; determining, when the swingable support rod is swinging, a current swing angle of the swingable support rod; determining a current distance between the fan and a user; determining, based on the current distance and the current swing angle, an axial rotation angle of the fan head; and rotating the fan head based on the axial rotation angle to direct air at the user.