Wireless Evaporative Cooler Control for Humidity and Water Use
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Solution Overview
Problem
Evaporative coolers face high water usage and inability to adapt to changing environmental conditions, leading to increased humidity and discomfort or damage within buildings.
Innovation Solution
A microprocessor-based logic system with temperature and humidity sensors, coupled with a wireless remote sensor unit that reports external data, allows for adaptive control of evaporative coolers by comparing interior and exterior conditions, adjusting operations such as water pump and fan speed, and incorporating a real-time clock for timed control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If evaporative cooler operates continuously with manual control, then cooling effect is maintained, but water usage increases significantly
Solution Approach 1:
The system uses a microprocessor-based logic system with temperature and humidity sensors inside the building to continuously monitor environmental conditions. The controller receives feedback from these sensors and automatically adjusts the evaporative cooler operation, turning it on only when cooling is actually needed based on real-time temperature and humidity readings, thereby reducing unnecessary water consumption.
Solution Approach 2:
The system dynamically adapts its operation based on changing environmental conditions. Rather than continuous operation, the evaporative cooler is controlled to operate only when temperature and humidity thresholds are exceeded, allowing the system to respond flexibly to actual cooling needs and minimize water usage during periods when cooling is not required.
2Temperature
If evaporative cooler operates continuously, then interior temperature is maintained, but interior humidity increases causing discomfort and potential damage
Solution Approach 1:
The controller monitors both temperature and humidity levels inside the building using dedicated sensors. When humidity reaches a predetermined threshold, the system receives feedback and automatically shuts off the water pump to prevent further humidity increase, while maintaining temperature control through fan operation alone if needed.
Solution Approach 2:
The system changes its operational parameters dynamically by independently controlling the water pump and fan based on real-time humidity and temperature readings. When humidity is high, the system reduces or stops water circulation while maintaining air circulation, thereby adjusting the cooling mechanism to avoid excessive humidity while still providing temperature control.
3Temperature
If simple thermostat control is used, then basic temperature control is achieved, but system cannot adapt to changing environmental conditions
Solution Approach 1:
The system incorporates multiple sensors (temperature and humidity) both inside and outside the building that continuously provide feedback to the microprocessor-based controller. This enables the system to detect and respond to changing environmental conditions such as rain, sunset, or temperature inversions, automatically adjusting operation based on real-time data from multiple sources rather than relying on fixed thermostat settings.
Solution Approach 2:
The controller dynamically adjusts its control strategy based on environmental conditions. It can detect external factors like rain or sunset and modify its operation accordingly, such as reducing water pump operation during rain events or adjusting fan speed based on outdoor temperature differentials, thereby adapting to changing conditions rather than following a static control pattern.
4Adaptability or versatility
If microprocessor-based control with multiple sensors is implemented, then adaptive control and humidity management improve, but device complexity increases
Solution Approach 1:
The microprocessor-based controller automatically performs all control decisions without requiring user intervention or complex manual programming. The system self-adjusts its operation based on sensor inputs, automatically determining when to turn the evaporative cooler on or off, when to operate the water pump versus the fan alone, and how to respond to various environmental conditions, thereby managing complexity internally while providing simple automated control.
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
This solution significantly reduces water and electricity usage while maintaining comfort by limiting cooler operation to necessary times, effectively managing humidity and temperature changes.
Implementation Method 1
an outside sensor that wirelessly reports external temperature, humidity and barometric pressure back to the controller
Implementation Method 2
A blower fan pulls dry outside air through the wet pads and exhausts cooled air into a duct distribution system located within the building
Data Source
AI summary
A controller system to control and operate a paired evaporative cooler using a wireless remote sensor to detect outside temperature, humidity and barometric pressure transmitted via a radio frequency transceiver to be processed by a programmable main controller unit by a user according to a plurality of programming modes to generate digital control data to be sent to the paired evaporative cooler to control its fan's speed and water pump's speed; the paired evaporative cooler can also be controlled using wireless communication by a hand held remote control device controlling a switching unit mounted inside the paired evaporative cooler; additionally, the main controller unit can receive control data by an incorporated Wi-Fi receiver and transmitter which will allow real time control and programming of the main controller unit from either a personal computer, or a mobile computing device, or a smart cellular phone.