Compressor Enclosure Evacuation for Flammable Refrigerant Leaks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Air handling systems using flammable refrigerants like R32 face risks of ignition and explosion due to potential leaks, which pose safety hazards and violate environmental regulations by emitting high Global Warming Potential (GWP) refrigerants.
Innovation Solution
A safety system for evacuation of contaminated air and prevention of ignition in air handling systems, comprising a compressor enclosure with an evacuation unit, air contamination sensors, and an independent safety power supply, which includes fans and uninterruptible power supplies to efficiently remove contaminated air and prevent ignition, even during power outages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flammable refrigerant R32 is used to replace R410A, then the Global Warming Potential is reduced and COP is improved, but the risk of ignition and explosion increases
Solution Approach 1:
The patent extracts the harmful contaminated air containing refrigerant leaks from the compressor enclosure by introducing a dedicated evacuation unit with extraction fans. This separates the hazardous substance (refrigerant-laden air) from the potential ignition sources within the enclosure, directly addressing the ignition risk while preserving the benefits of using R32 refrigerant
Solution Approach 2:
The patent introduces an intermediary evacuation system that acts as a buffer between the refrigerant leakage source and potential ignition sources. The extraction unit creates a controlled air flow that prevents direct contact between leaked refrigerant and ignition sources, mediating the hazardous interaction
2Object-affected harmful factors
If the compressor enclosure is sealed to prevent refrigerant leakage, then the safety against external ignition is improved, but the accumulation of leaked refrigerant inside the enclosure increases the internal ignition risk
Solution Approach 1:
The patent transforms the static sealed enclosure into a dynamic system with controlled air flow. The evacuation unit continuously adjusts the air flow within the enclosure to maintain positive pressure and prevent refrigerant accumulation, making the enclosure adaptable to leakage conditions while maintaining both sealing and ventilation functions
Solution Approach 2:
The patent implements preliminary action by continuously evacuating contaminated air before refrigerant concentrations can reach ignitable levels. The extraction unit operates proactively to maintain safe conditions, preventing the harmful situation rather than merely responding to it
3Object-affected harmful factors
If the evacuation unit operates continuously to remove contaminated air, then the safety against ignition is improved, but the energy consumption increases
Solution Approach 1:
The patent implements periodic action by controlling the evacuation unit to operate based on detected refrigerant concentrations rather than continuous operation. The system activates the extraction fans when leakage is detected and deactivates them when safe conditions are restored, reducing energy consumption while maintaining ignition prevention
4Use of energy by moving object
If air flow rate in the evacuation unit is reduced to save energy, then the energy consumption is reduced, but the refrigerant may accumulate and reach flammable concentrations
Solution Approach 1:
The patent implements feedback control by using sensors to continuously monitor refrigerant concentrations and adjusting the evacuation unit's air flow rate accordingly. The system increases air flow when concentrations approach dangerous levels and reduces air flow when safe, creating a self-regulating mechanism that balances energy consumption with safety
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 reduces the risk of refrigerant leaks entering the air treatment area and prevents ignition, ensuring safety and compliance with environmental regulations by continuously evacuating contaminated air and maintaining system operation during power disruptions.
Implementation Method 1
an extraction unit (8) connected to the compressor enclosure (3) for evacuation of contaminated air from the compressor enclosure (3)
Data Source
AI summary
A safety system (1) for evacuation of contaminated air and prevention of ignition in an air handling system (2). The air handling system (2) comprises a compressor enclosure (3). The safety system (1) is connectable to a power supply (4) and comprises an evacuation unit (5) connected to the compressor enclosure (3) for evacuation of contaminated air from the compressor enclosure (3).