Valve Unit Safety System with Shared Discharge for Refrigerant Leakage
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Solution Overview
Problem
Heat pump systems face challenges in safely managing refrigerant leakage from valves, particularly when valves are located in separate casings, as it is difficult to detect and contain leaks efficiently, posing safety risks and complicating maintenance due to potential flammability of refrigerants and spatial limitations.
Innovation Solution
A safety system comprising valve units with integrated refrigerant leakage detectors, a connection structure to link internal spaces of casings, and a discharge structure to vent air from affected casings, preventing refrigerant spread and allowing for early detection and containment of leaks, while maintaining system safety and maintainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If valves are separated into multiple casings, then spatial arrangement flexibility is improved, but safety deteriorates due to difficulty in detecting and containing refrigerant leaks
Solution Approach 1:
The system divides the valve assembly into multiple separate casings, each equipped with its own refrigerant leakage detector. This segmentation allows flexible spatial arrangement while maintaining safety through localized monitoring and containment capabilities in each casing.
Solution Approach 2:
Each casing is equipped with a refrigerant leakage detector that continuously monitors for leaks and provides immediate feedback. When a leak is detected, the system activates a discharge structure to vent the casing, creating a closed-loop safety mechanism that responds automatically to leakage conditions.
2Reliability
If valves are integrated into a single casing, then safety is improved by containing leaks, but device complexity increases due to accommodation difficulties
Solution Approach 1:
Instead of forcing all valves into one complex casing, the system segments them into multiple manageable casings. Each casing is designed to accommodate specific valves, reducing integration complexity while maintaining safety through distributed detection and discharge structures.
Solution Approach 2:
Each casing is designed as a universal unit with standardized components: refrigerant leakage detector, discharge structure, and control mechanisms. This multi-functionality allows each casing to operate independently while contributing to overall system safety, reducing the complexity of integrating diverse valve types into a single casing.
3Ease of operation
If multiple separate casings are used, then maintenance accessibility is improved, but time consumption increases due to need to check each casing individually
Solution Approach 1:
The refrigerant leakage detectors in each casing provide continuous monitoring and immediate feedback about leakage conditions. This eliminates the need for manual inspection of each casing, as the automated detection system continuously reports the status of all casings, significantly reducing maintenance time while maintaining accessibility.
Solution Approach 2:
Each casing is equipped with self-monitoring capabilities through integrated refrigerant leakage detectors and automated discharge structures. The system performs self-inspection and self-protection functions, eliminating the need for manual checking of each casing and reducing maintenance time while improving accessibility.
4Stability of the object's composition
If refrigerant leakage detection is delayed, then system operation stability is maintained, but safety deteriorates due to high refrigerant concentration
Solution Approach 1:
The refrigerant leakage detectors in each casing provide continuous real-time feedback about leakage conditions. This immediate detection capability allows the system to respond promptly to leaks while maintaining stable operation through automated discharge mechanisms, preventing dangerous refrigerant accumulation without disrupting overall system stability.
Solution Approach 2:
The system performs preliminary detection and response actions by continuously monitoring for leaks before they can accumulate to dangerous levels. The automated discharge structure is ready to activate immediately upon detection, preventing high refrigerant concentration while maintaining system operation stability through proactive safety measures.
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 detects and contains refrigerant leaks, enhancing safety and maintainability by preventing refrigerant concentration and spread, even when valves are separated, and does so without increasing installation costs.
Implementation Method 1
a refrigerant leakage detector configured to detect an occurrence of a refrigerant leakage in an internal space of the casing
Implementation Method 2
a discharge structure connected to the connection structure or one of the casings, and configured to discharge air from the internal space of the casing in which a refrigerant leakage has occurred
Data Source
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AI summary
Provided a safety system (700) comprising: a plurality of valve units (200) for a heat pump system, a connection structure (710), and a discharge structure (720, 730). Each valve unit has refrigerant pipe portions (311, 330) with control valves (364, 365), a casing (400) accommodating at least the valves, and a refrigerant leakage detector (500). The connection structure connects the internal spaces of the casings via openings (420, 430) of the casing. The discharge structure is connected to the connection structure or one of the casings and configured to discharge air from the internal space of the casing in which a refrigerant leakage has occurred. The discharge structure includes a shared duct (720) connected to the connection structure or one of the casings, and a ventilator (730) disposed to the shared duct.