Abstract
The control described is based on the combination of three techniques to develop an accurate low-cost unit responsive to frost loading on evaporator coils. For sensing, a fluidic type sensor monitors the air pressure drop across the evaporator, responding to signals in the order of 0.1 to 0.5 in of water. To detect the signal from the sensor, a simple yet highly accurate and reliable transistor bridge circuit is used. A motor driven timer, which integrates the detected signal, provides a uniform period for defrost and run off, and switches the relatively high currents of the defrost and compressor circuits. The use of this system can extend the interdefrost interval in low humidity conditions by a factor of 3 or 4.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
