FIELD: physics.
SUBSTANCE: timer comprises power supply source, time counter, heater, detector of defrosting completion, compressor, rectifier, quenching element, voltage limiter, three-pin electromagnet relay, movable contact of which is connected to the second pole of power supply source; common lead of time counter is connected to the first fixed relay contact and via compressor - to the first pole of power supply source; counter inlet of time counter via heater is connected to the second fixed relay contact and via detector of defrosting completion - to the first pole of power supply source; outlet of time counter is connected to the first lead of relay winding, the second lead of which via circuit of serially connected rectifier and quenching element is connected to the second fixed relay contact; common point of the second lead of relay winding and circuit formed by serially connected rectifier and quenching element is connected to common lead of time counter via voltage limiter.
EFFECT: increased reliability of operation.
1 dwg
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|---|---|---|---|
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RU2067052C1 |
