Defrost timer is automatic frost, do not manually to adjust, usually the refrigerator compressor run cumulative to the rated working time value (about 8 hours), defrost timer will automatically turn to the status of Frost, stop the compressor operation, electrify heating cream heating tube. Defrost Timer Relay After the defrosting is finished, defrost timer will automatically turn into refrigeration state, blackout heating pipe, electric power compressor.
defrosting timer is an important component of the control circuit of frost-free refrigerator. It can control the time interval of frost, control the operation of the defrosting heater regularly, and defrost the refrigerator automatically. defrosting Timer timing motor and compressor operation, when the compressor cumulative work hours (usually about 8h). The evaporator will have a layer of frost. At this time, the defrosting timer switch will automatically convert to the defrosting circuit, while cutting off the defrosting timer motor and compressor power supply, and then the evaporator and other components of the cream. Defrost Timer Relay After the defrosting is finished, defrost timer switch is automatically converted to the refrigeration circuit, the compressor restarts, defrost timer again.
The defrosting timer consists of miniature motor, gear turning box and contact cam mechanism. Defrost Timer Relay It can be divided into mechanical defrost timer and electronic defrost timer.
Defrost timer structure.
1 Mechanical defrosting timer by the timing motor and a group of contacts, the contact action time is equal to the cumulative operation of the compressor time, the interval according to different models and different, usually 8h action once, the defrosting time of about 10min. The frost layer dissolves, Defrost Timer Relay the bimetallic switch jumps off, and the defrosting ends. Because at this time defrost timer switch is still in the position of 1-3, the timer motor can also rotate normally. 2min, switch from 3 to 2, connected to the compressor and fan, refrigerator start refrigeration cycle, defrosting timer into the next round of frost timing.
2 The electronic defrosting timer is controlled by the microcomputer to control the whole frost process. It is characterized by the use of electronic counters to replace mechanical timing motors.