Area-Based HVAC Controller Interlock for Refrigerant Leak Ventilation
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Solution Overview
Problem
In air conditioning systems where the air conditioner and ventilator are installed independently, there is a risk of accidents due to refrigerant leaks, as the communication system between these devices may not be securely connected, preventing the ventilator from operating to discharge the refrigerant effectively.
Innovation Solution
An air conditioning controller is implemented to perform an area registration process, allocating indoor units and ventilators to specific area identification frames, ensuring that no operation is allowed unless all ventilators are allocated, thereby establishing a secure communication system between the air conditioner and ventilators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the air conditioner and ventilator are installed independently by different suppliers, then the selection and installation flexibility is improved, but the communication system connection reliability deteriorates
Solution Approach 1:
The system divides the air treatment function into separate air conditioner and ventilator units that can be independently selected and installed. Each unit operates as an independent module, allowing different suppliers to provide specialized equipment for cooling and ventilation respectively, while maintaining system-level coordination through the controller.
Solution Approach 2:
The air conditioning controller acts as an intermediary device that bridges the communication between independently installed air conditioners and ventilators. It receives installation information from both devices and coordinates their operations, ensuring reliable communication and coordinated control even when installed by different suppliers.
2Object-affected harmful factors
If the ventilator is operated to discharge refrigerant when leak is detected, then the safety against refrigerant leak accidents is improved, but the system complexity increases
Solution Approach 1:
The controller performs preliminary actions by collecting installation information from both the air conditioner and ventilator during the setup phase. It pre-establishes the communication links and coordination protocols between devices, so that when a refrigerant leak is detected, the ventilator can be immediately operated to discharge refrigerant without requiring complex real-time system reconfiguration.
3Manufacturing precision
If the indoor units are allocated to predetermined areas with corresponding ventilators, then the operational control precision is improved, but the installation and configuration complexity increases
Solution Approach 1:
The controller performs preliminary allocation of indoor units to predetermined areas and assigns corresponding ventilators to each area during the initial setup phase. This pre-configuration establishes the operational control relationships between units, enabling precise area-specific control while simplifying subsequent operations.
Solution Approach 2:
The air conditioning controller serves multiple functions: it manages indoor unit operations, tracks installation information, allocates units to areas, and coordinates ventilator operations. This multi-functionality consolidates what would otherwise require separate systems into a single universal controller, reducing overall system complexity.
Data Source
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AI summary
An air conditioning controller (12) is configured to allocate indoor units (3a, 3b, 3c, 3d) individually to one of area identification frames each corresponding to areas, and to perform an area registration process of allocating ventilators (6a, 6b) that are configured to perform ventilation of a space to be air-conditioned, individually to one of the area identification frames. The air conditioning controller (12) is further configured not to allow operations of the plurality of indoor units (3a, 3b, 3c, 3d) when there is an area identification frame to which none of the ventilators (6a, 6b) are allocated, in the plurality of area identification frames.