| 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 N1 and the outdoor air temperature and controller means are provided to calculate a new value of N1 after each defrost operation, the calculation being based on stabilized values of outdoor air temperature and outdoor coil temperature for clear coil conditions.
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