Enclosure Cooling Controller with AC Power Loss Simulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cooling systems for enclosures, especially those requiring closed-loop cooling, are inadequate as they cannot effectively manage temperature fluctuations and power supply variations, leading to inefficient cooling and potential damage to enclosed components.
Innovation Solution
A cooling system comprising a heat exchanger, an air conditioner, and a controller that coordinates their operation based on temperature data from a thermostat. The controller simulates loss of AC power to activate the heat exchanger and air conditioner above a set point, ensuring efficient cooling and protecting enclosed components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a filtered fan system is used to maintain constant flow of filtered ambient air through the enclosure, then the system cost is reduced and ease of manufacture is improved, but the system cannot maintain closed-loop cooling when ambient air is contaminated or liquid exposure is possible
Solution Approach 1:
The system dynamically switches between different cooling modes (filtered fan system and closed-loop system) based on environmental conditions and power availability. The controller adjusts the operating mode to maintain effective cooling while adapting to changing conditions, resolving the contradiction between simplicity and adaptability.
Solution Approach 2:
The system changes operational parameters by switching between ambient air intake mode and closed-loop recirculation mode. This parameter change allows the system to maintain closed-loop cooling capability when needed while using the simpler filtered fan system under favorable conditions.
2Device complexity
If only an air conditioner is used for cooling the enclosure, then the device complexity is reduced, but the system cannot effectively manage temperature fluctuations under varying power supply conditions
Solution Approach 1:
The cooling function is segmented into two separate systems: an air conditioner for primary cooling and a heat exchanger for supplemental cooling and heat rejection. This segmentation allows each component to operate independently under different conditions, improving temperature control reliability without requiring a single complex system.
Solution Approach 2:
The controller dynamically manages the operation of both cooling components based on temperature readings and power availability. This dynamic control ensures reliable temperature management by activating the appropriate cooling component(s) under varying conditions.
3Device complexity
If the heat exchanger operates only on DC power without AC power simulation, then the power supply requirements are simplified, but the system cannot activate the heat exchanger during AC power loss events
Solution Approach 1:
The controller performs preliminary simulation of AC power loss conditions to pre-activate the heat exchanger on DC power before actual AC power failure occurs. This preliminary action ensures the heat exchanger is already operational when AC power is lost, maintaining cooling availability during power transitions.
Solution Approach 2:
The system preemptively counteracts the potential harm of AC power loss by simulating the loss condition and activating the DC-powered heat exchanger in advance. This preliminary anti-action prevents temperature rise that would otherwise occur during AC power transitions.
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 effectively maintains enclosure temperatures within a safe range, even under varying ambient conditions and power supply scenarios, thereby protecting sensitive components and optimizing energy usage.
Implementation Method 1
a heat exchanger... operating, using the controller, the heat exchanger and an air conditioner above the set point
Implementation Method 2
heat exchanger... maintaining a required temperature range within the enclosure
Implementation Method 3
an air conditioner... operating, using the controller, the heat exchanger and an air conditioner above the set point
Implementation Method 4
various cooling equipment such as air conditioners, heat exchangers... are used to maintain required operating temperatures within the enclosure
Implementation Method 5
employ a fan which induces the cooler ambient air through a filter media into the enclosure, therefore creating a positive pressure inside the enclosure forcing the hot enclosure air out through an exhaust vent
Data Source
AI summary
One example implementation provides a method for controlling enclosure interior temperature, including obtaining, from a thermostat, temperature data indicative of interior enclosure temperature; determining, using a controller, that the temperature data indicates that the interior enclosure temperature exceeds a set point; simulating for a heat exchanger, using the controller, loss of alternating current (AC) power supply; and thereafter operating, using the controller, the heat exchanger and an air conditioner above the set point.