Air Conditioner Start Interlock for Refrigerant Leak Ventilation
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Solution Overview
Problem
In air conditioning systems where the air conditioner and ventilation unit are installed independently, there is a risk of inadequate ventilation in case of refrigerant leakage, leading to potential accidents due to unreliable electrical communication between devices, including refrigerant leak sensors, which can result in oxygen deficiency, flammable gas accumulation, or toxic gas exposure.
Innovation Solution
The air conditioning system ensures reliable electrical communication between the ventilation unit and refrigerant leak sensor by inputting signals to the air conditioning control component, preventing operation of the air conditioner unless proper ventilation is guaranteed, and includes a ventilation control component to control the ventilation unit, sending notification signals to ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the air conditioner and ventilation unit are installed independently by different contractors, then installation flexibility and user choice are improved, but the reliability of electrical communication between devices deteriorates
Solution Approach 1:
The patent merges the control functions by having the air conditioner's control component receive signals from both the refrigerant leak sensor and ventilation unit, integrating independent devices into a coordinated system that ensures reliable operation despite independent installation
Solution Approach 2:
The air conditioning control component is designed to perform multiple functions: controlling the air conditioner operation, receiving refrigerant leak detection signals, and controlling the ventilation unit, thereby serving as a universal control hub that bridges independently installed devices
2Ease of operation
If the air conditioner operates without verified ventilation capability, then ease of operation is improved, but safety deteriorates due to potential refrigerant leakage accidents
Solution Approach 1:
The system performs preliminary verification by having the control component confirm receipt of signals from both the refrigerant leak sensor and ventilation unit before allowing air conditioner operation, ensuring safety measures are in place beforehand
Solution Approach 2:
The control component continuously monitors feedback signals from the refrigerant leak sensor and ventilation unit, adjusting operation based on the current safety status and ensuring ventilation capability is maintained throughout operation
Data Source
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AI summary
An air conditioning system (100) has an air conditioner (10), which includes an outdoor unit (20) and an indoor unit (30) that configure a refrigerant circuit (RC), and a controller (70), which controls the running of the air conditioner (10). The controller (70) does not allow operation of the air conditioner (10) to start in a case where a signal from a ventilation unit (40) that includes a ventilation fan (43, 44) for ventilation and ventilates a target space (SP) or a refrigerant leak sensor (60) that detects refrigerant leakage in the target space (SP) is not input to the controller (70). Because of this, even in a configuration where an air conditioner and a ventilation unit are installed independently of each other, operation of the air conditioner can be performed in a state in which there is reliably established a countermeasure such as the ventilation unit being operated when the refrigerant has leaked, and safety and security with respect to refrigerant leakage are reliably ensured.