| 摘要 |
An evaporator coil defroster and method of controlling evaporator coil defrosting in an evaporator of a refrigeration system. The evaporator coil defroster includes an evaporator coil defrosting device (22) for melting frost on an evaporator coil (20), and an evaporator coil defrosting device control (26, 40) that is coupled to a power source (27) and the evaporator coil defrosting device (22) to selectively activate and deactivate the evaporator coil defrosting device (22). The evaporator coil defroster device control (26, 40) includes a timer for selecting a predetermined duration of activation of the evaporator coil defrosting device (22). The evaporator coil defrosting device control (26, 40) alternately includes a sensor (36, 44), with or without of the timer, that senses a parameter of the evaporator coil (20), preferably frost, and is in communication with the evaporator coil defrosting device (22) control such that the evaporator coil defrosting device (22) is selectively activated in accord with a predetermined change in the sensed parameter. |
