UPS Fan Volume Control via Dynamic Speed Adjustment
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Solution Overview
Problem
Uninterruptible power systems (UPS) generate annoying noise from cooling fans, which can interfere with daily life, particularly for individuals with low noise tolerance, as existing solutions do not effectively control the operational volume.
Innovation Solution
A volume control device for UPS systems comprising a control circuit and user interface that adjusts the fan's rotation speed based on a user-set maximum operation volume setting, determining whether the current volume exceeds this limit and adjusting accordingly to prevent noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the fan rotation speed is increased to improve cooling performance, then the cooling efficiency is improved, but the operation volume increases and causes noise interference
Solution Approach 1:
The patent applies dynamics by making the fan rotation speed adjustable rather than fixed. The control circuit dynamically adjusts the fan speed based on temperature conditions and user-defined volume limits, allowing the system to optimize between cooling performance and noise levels. The fan speed can be changed in real-time according to operational requirements.
Solution Approach 2:
The patent changes the operational parameters of the fan by introducing multiple rotation speed levels (first rotation speed, second rotation speed, third rotation speed) and allowing dynamic adjustment between them. The control circuit modifies the fan speed parameter based on temperature thresholds and user-set volume constraints, achieving optimal balance between cooling and noise.
2Object-generated harmful factors
If the fan rotation speed is decreased to reduce operation volume, then the noise interference is reduced, but the cooling performance deteriorates
Solution Approach 1:
The system dynamically adjusts fan speed based on real-time temperature monitoring and user-defined volume constraints. When temperature exceeds thresholds, the control circuit increases fan speed to maintain cooling performance. When temperature is acceptable and volume limit is not exceeded, the system operates at lower speeds to reduce noise.
Solution Approach 2:
The control circuit implements feedback by continuously monitoring temperature conditions and comparing them against predefined thresholds. Based on this feedback, along with user-defined volume constraints, the system automatically adjusts fan rotation speed to maintain optimal balance between cooling performance and acceptable noise levels.
3Device complexity
If a fixed fan rotation speed is used to simplify control, then the device complexity is reduced, but the ability to adapt to different noise requirements is lost
Solution Approach 1:
The patent implements dynamic control with multiple fan speed levels (first, second, and third rotation speeds) that can be adjusted based on temperature conditions and user-defined volume constraints. This dynamic approach provides adaptability to different noise requirements while maintaining manageable control complexity through automated threshold-based decision logic.
Solution Approach 2:
The system performs preliminary action by pre-defining multiple rotation speed levels and temperature thresholds before operation. The control circuit is pre-programmed with cooling thresholds and volume constraints, enabling it to automatically make appropriate adjustments without requiring complex real-time calculations or user intervention during operation.
Data Source
AI summary
A volume control device suitable for an uninterruptible power system comprising a fan is provided. The volume control device comprises a user interface and a control circuit. The control circuit is electrically coupled to the fan and the user interface, and is used to receive a maximum operation volume setting value through the user interface. When the control circuit is ready to increase the rotation speed of the fan, it further determines whether the corresponding volume of the current rotation speed of the fan is less than the maximum operation volume setting value, and accordingly determines whether to adjust the rotation speed of the fan.