CONTROLLER FOR DEFROSTING OF OUTDOOR COIL FOR REFRIGERATOR

摘要

A defrost control system for a reverse cycle refrigeration system wherein the outdoor coil is defrosted when outdoor coil temperature is equal to or less than the product of a preselected constant N.sub.1 and the outdoor air temperature and controller means are provided to calculate a new value of N.sub.1 after each defrost operation, the calculation being based on stabilized values of outdoor air temperature and outdoor coil temperature for clear coil conditions.