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A Microprocessor Controller and Sensor for Refrigerant Low Charge Detection in an Air Conditioning System
ISSN: 0148-7191, e-ISSN: 2688-3627
Published December 04, 2000 by SAE International in United States
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A patent pending microprocessor controller, detection algorithm and low cost sensor have been developed to accurately detect a refrigerant low charge state in mobile air conditioning systems. The device is intended to prevent damage to the air conditioning system compressor and was designed primarily for truck and bus applications although the principles may also be applied to automotive, agricultural, construction, mining equipment and stationary HVAC applications. The system uses a single, thermistor based refrigerant charge sensor, an optional high pressure transducer and a microprocessor controlled electronics module coupled with standard air conditioning system components to detect the presence or lack of refrigerant in the A/C circuit.
CitationKamemoto, D., Hamberg, P., and Hansen, G., "A Microprocessor Controller and Sensor for Refrigerant Low Charge Detection in an Air Conditioning System," SAE Technical Paper 2000-01-3444, 2000, https://doi.org/10.4271/2000-01-3444.
- Hansen Gary P. Jain Virender “The Development of a Complete Refrigerant Management System for Heavy Duty Vehicle Air Conditioning Applications.” SAE Technical Paper 942281 International Truck & Bus Meeting & Exposition Nov. 7-9 1994
- Solberg James Miller Norman R. Hrnjak Predrag “A Sensor for Estimating the Liquid Mass Fraction of the Refrigerant Exiting an Evaporator.” SAE Technical Paper 2000-01-0976 SAE 2000 World Congress March 6-9 2000