defrosting timer includes shell, the shell body is fitted with a micro motor, a gear reducer, a cam and three pieces of shrapnel that are close to the cam, and a block is arranged at one end of the three piece, which can keep the three pieces separated from each other to avoid contact. This technology has the advantages of simple structure, beautiful appearance, lightweight, reliable and high work.
The defrosting timer includes: an input unit, applying its power to the defrosting timer, and receiving input for controlling the time of the defrosting timer; the control unit, by using the input time and program-controlled compression mode or defrosting mode; Defrost Timer Relay The compression mode or the defrosting mode is controlled directly under the control of the control unit. According to the defrost timer, because the input unit, the control unit and the output unit are installed on the PCB and the compression or defrosting mode is controlled by the program, Defrost Timer Relay the compression/defrosting time of the refrigerator can be controlled by the program simply and quickly without needing any molded parts and thus saving the manufacturing cost and time.
defrosting timer by the bridge Rectifier, microcontroller micro-processing chip, output control relays, the mains by J1, J3 power plug access to power input, Defrost Timer Relay power input to the rectifier step-down device, power distributor, microcontroller micro-processing chip respectively connected to the operation of the Frost Time program settings, The defrosting operation and the parallel defrosting running state display and the defrosting operation Drive; The defrosting operation-driven output is connected to the output control relay. Defrost Timer Relay This technology is used for defrosting control of the system, so that defrosting can achieve satisfactory effect, the device has high time control precision, no wear, no noise, low temperature rise, reliable work, long life, controlled vibration and wide application.
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, Defrost Timer Relay 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. It can be divided into mechanical defrost timer and electronic defrost timer. The following figure shows the defrost timer structure.
1 Mechanical defrosting timer by the timing motor and a group of contacts, Defrost Timer Relay 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, 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, Defrost Timer Relay 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.