Climate Chamber Fan Speed Control for Fast Temperature Regulation
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Solution Overview
Problem
Climate chambers with existing heat exchanger systems have a long response time to temperature regulation, requiring significant time to adjust air stream temperature to a desired value, due to the slow reaction of heat exchangers to regulating actions.
Innovation Solution
The method involves using a fan with a temperature sensor in the supply channel to adjust the rotational speed of the fan based on detected temperature, leveraging the heat generated by friction to rapidly fine-tune the air stream temperature, potentially eliminating the need for additional heating sources and reducing the reliance on heat exchangers for rapid temperature adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat exchangers are used to regulate air stream temperature, then temperature control is achieved, but the response time is long and temperature adjustment is slow
Solution Approach 1:
The patent replaces the thermal regulation system (heat exchangers) with a mechanical system (fan speed control) to achieve temperature regulation. By adjusting fan rotational speed, the system exploits frictional heating to rapidly adjust air stream temperature without the delay inherent in thermal heat exchanger systems.
Solution Approach 2:
The patent changes the operational parameter of the fan from constant speed to variable speed control. By dynamically adjusting fan speed based on temperature sensor feedback, the system modulates frictional heating to achieve rapid temperature response, transforming a static parameter into a dynamic control variable.
2Temperature
If fan rotational speed is increased to generate more friction heat, then air stream temperature increases, but energy consumption increases
Solution Approach 1:
The patent implements a feedback control system where temperature sensors monitor the air stream temperature and feed this information back to the control mechanism. The controller adjusts fan speed based on the temperature deviation from the setpoint, increasing speed only when heating is needed and reducing it when the desired temperature is reached, thereby optimizing energy consumption.
Solution Approach 2:
The system utilizes the fan's own operational characteristic (frictional heating during rotation) to achieve temperature regulation without requiring separate heating equipment. The fan serves dual functions: air circulation and temperature control through friction heat, eliminating the need for additional energy-intensive heating 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
This approach allows for precise and rapid temperature regulation within the climate chamber, maintaining accurate temperature control with minimal delay, especially in well-isolated chambers like those for hatching eggs or chicks, achieving temperature stability within ±1°C accuracy.
Implementation Method 1
the heat given off by the fan as a result of friction can be used for regulating the temperature of air flowing along or through the ventilator
Implementation Method 2
a temperature sensor provided in the supply channel for detecting the temperature of the air stream flowing, during use, through the supply channel
Implementation Method 3
the rotational speed of the fan is adjusted for influencing the temperature of air displaced by the fan. The rotational speed may be adjusted as a function of the temperature detected by the temperature sensor
Data Source
AI summary
A climate chamber that can include a temperature-controlled compartment containing a product such as hatching eggs, chickens, or chicks, a fan which gives off heat during operation, a supply channel extending from the fan up to the compartment, and a temperature sensor provided in the supply channel. An air stream is supplied to the compartment by the fan via the supply channel. The temperature of the air flowing through the supply channel is detected by the temperature sensor. The rotational speed of the ventilator is adjusted as a function of the temperature detected by the temperature sensor for influencing the temperature of air displaced by the fan.