Ceiling Fan Automatic Mode Switching for Thermal Comfort Control

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Solution Overview

Problem

Conventional ceiling fans are inefficient in managing thermal comfort and energy consumption, particularly in heating and cooling seasons, as they require manual intervention and can be noisy, cause drafts, and consume more energy than necessary.

Innovation Solution

A smart fan system integrated with sensors and controllers that adjust speed based on occupancy, temperature, and thermostat modes to optimize energy conservation and thermal comfort, automatically switching between heating and cooling modes without user intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If conventional ceiling fans are run at high speeds in reverse to mix heat and cold air, then thermal comfort is improved, but energy consumption increases and noise is generated

Engineering Contradiction:

Improvethermal comfortVSAvoidenergy consumption

Core Design Contradiction:

TemperatureVSUse of energy by moving object

Solution Approach 1:

The fan system dynamically adjusts its operating mode and speed based on real-time detection of thermostat state and room conditions. The controller automatically switches between forward rotation (cooling mode), reverse rotation (heating mode), and off state, optimizing energy consumption while maintaining thermal comfort.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates feedback from temperature sensors and thermostat state to automatically control fan operation. The controller receives temperature data and thermostat mode information, then adjusts fan speed and direction accordingly, eliminating the need for manual intervention and optimizing energy usage based on actual environmental conditions.

Inventive Principle:

Principle #23Feedback

2Temperature

If conventional ceiling fans are manually switched between forward and reverse modes, then thermal comfort is optimized, but ease of operation deteriorates

Engineering Contradiction:

Improvethermal comfortVSAvoidease of operation

Core Design Contradiction:

TemperatureVSEase of operation

Solution Approach 1:

The fan system performs self-service by automatically detecting the thermostat state and room temperature, then autonomously selecting the appropriate operating mode (forward or reverse rotation) and speed. This eliminates the need for users to manually switch modes, significantly improving ease of operation while maintaining optimized thermal comfort.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The manual mechanical switching mechanism is replaced with an automated electronic control system that uses sensors and a controller to automatically adjust fan operation based on environmental conditions, eliminating the need for user intervention.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Temperature

If ceiling fans are operated to mix air throughout the space, then thermal comfort is improved, but harmful factors increase

Engineering Contradiction:

Improvethermal comfortVSAvoiddrafts and noise

Core Design Contradiction:

TemperatureVSObject-generated harmful factors

Solution Approach 1:

The system applies partial action by operating the fan at optimized speeds and modes rather than always at maximum capacity. The controller adjusts fan operation to provide sufficient air mixing for thermal comfort while avoiding excessive speeds that generate harmful drafts and noise, achieving the minimum necessary action for effective performance.

Inventive Principle:

Principle #16Partial or excessive action

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 system achieves up to 30% energy savings by optimizing fan operation based on real-time conditions, enhancing thermal comfort and reducing energy consumption through intelligent control of fan speed and mode adjustments.

Implementation Method 1

a sensor for measuring a temperature in the space

Methodology Applied

Scientific EffectTemperature sensing:

Implementation Method 2

a fan for circulating air within the space based on the temperature sensed by the sensor

Methodology Applied

Scientific EffectAir circulation:

Implementation Method 3

the fan may be controlled such that the first speed is a speed at which an appreciable air velocity is created at a particular distance from the fan

Methodology Applied

Scientific EffectAir velocity generation:

Data Source

PatentUS11719249B2Integrated thermal comfort control system with variable mode of operation

Publication Date: 2023.08.08 DELTA T CORP

AI summary

A system for controlling thermal comfort in a space is provided with variable mode of operation. This system may include a conditioner for conditioning air in the space, and a sensor for measuring a temperature in the space. A controller is provided for controlling the conditioner based on the temperature sensed by the sensor, and a fan for circulating air within the space is regulated based on the temperature sensed by the sensor. A related system for controlling a fan based on height is also provided, as is a system and method for easily and efficiently determining the height of a fan using a simple camera, such as one on a “smart” phone. A further aspect pertains to a controller, such as for example a portable handheld device, having a user interface adapted for suggesting an increase in a set point temperature of a thermostat based on the selected speed of the fan.