Capsule Adapter for Split Heat Pump Refrigerant Leak Containment
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Solution Overview
Problem
Existing heat pumps using hazardous refrigerants face challenges in safely and efficiently managing leaks, which can lead to explosive or toxic conditions, and existing solutions either increase the risk of explosion or are costly and inefficient.
Innovation Solution
A gas-tight encapsulation system for the indoor unit of a split heat pump, using pressure-tight adapters to direct leaked refrigerant-air mixtures outside, eliminating direct contact with indoor air and incorporating safety switches to ensure proper closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If electrical sensors are used to detect critical refrigerant concentrations, then detection capability is improved, but the risk of explosion increases due to electrical ignition sources
Solution Approach 1:
The patent removes electrical sensors from the hermetically sealed enclosure containing hazardous refrigerant. Instead, sensors are placed in the surrounding installation room where they detect refrigerant that has already leaked out, eliminating the ignition risk while maintaining detection capability.
Solution Approach 2:
The hermetically sealed enclosure acts as an intermediary barrier between the hazardous refrigerant and the detection system. It allows refrigerant to leak into the installation room where safe, non-sparking sensors can detect it, mediating between the need for detection and the need to eliminate ignition sources.
2Reliability
If the installation room is made hermetically sealed, then safety is improved by containing leaks, but the risk of explosive mixture accumulation increases
Solution Approach 1:
The patent applies preliminary anti-action by providing active ventilation that prevents the formation of explosive mixtures before they can accumulate to dangerous levels. The ventilation system continuously removes leaked refrigerant, counteracting the containment effect of the hermetic seal.
Solution Approach 2:
The ventilation system maintains an inert atmosphere in the installation room by continuously exchanging air, preventing the formation of flammable refrigerant-air mixtures. This creates a safe environment despite the hermetic containment of the refrigerant system.
3Reliability
If double-walled heat exchangers are used, then safety is improved by containing leaks, but cost and installation complexity increase
Solution Approach 1:
The patent segments the safety function into two separate components: a simple hermetic enclosure containing the refrigerant and a separate ventilation system that handles leak management. This replaces the complex integrated solution of double-walled heat exchangers with two simpler, independent systems.
Solution Approach 2:
Instead of using expensive double-walled heat exchangers, the patent uses a simpler hermetic enclosure that copies the containment function at a lower cost and complexity level, supplemented by ventilation that provides the additional safety function.
4Ease of manufacture
If refrigerant leaks are allowed to vent to the installation room, then simple leak management is achieved, but toxic and flammable hazards are created
Solution Approach 1:
The hermetic enclosure serves as an intermediary that directs leaked refrigerant into the controlled ventilation system rather than allowing uncontrolled release into the installation room. The ventilation system then safely removes the refrigerant, mediating between simple leak venting and hazard prevention.
Solution Approach 2:
The continuous ventilation system maintains an inert atmosphere in the installation room by preventing hazardous refrigerant accumulation. This allows simple leak management while eliminating the toxic and flammable hazards that would otherwise result from uncontrolled venting.
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
Ensures safe and efficient removal of refrigerant leaks without increasing the risk of explosion or contamination, while avoiding the need for costly double-walled heat exchangers, maintaining energy efficiency, and reducing installation complexity.
Implementation Method 1
the adapter encloses all refrigerant lines which lead into and out of the capsule housing in a pressure-tight manner at their connection points
Implementation Method 2
an air line which leads from the inner part designed as a capsule housing into an outer area where the refrigerant-air mixture can be rendered harmless
Implementation Method 3
A gas-tight encapsulation system for the indoor unit of a split heat pump, using pressure-tight adapters to direct leaked refrigerant-air mixtures outside
Data Source
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AI summary
Device for the safe removal of a refrigerant-air mixture from an inner part (2) of a split heat pump designed as a capsule housing (6), comprising an air line (8) which leads from the inner part (2) designed as a capsule housing (6) into an outer area (11) where the refrigerant-air mixture can be rendered harmless, at least one pressure-tight adapter (9) which connects the capsule housing (6) to the air line (8), wherein the adapter (9) pressure-tightly encloses all refrigerant lines (3, 4) leading into and out of the capsule housing (6) at their connection points (14, 15), and can be tightly connected to an air-gas mixture inlet (13) on the capsule housing.