Food freezer electronic control system - has temp. sensor and thermostat calibration modifying monitor circuit

摘要

The electronic control system used for freezing food preserving units automatically connects and disconnects the refrigerator system. Rapid freezing and preserving is carried out automatically without manual intervention. A temperature sensor (1) held in a freezer cell is connected via signal amplifier (2) to thermostat circuit (4) for refrigerator (6) controlling and to a temp. alarm indicator circuit (3). The latter actuates a logic circuit monitoring calibration of the thermostat circuit. This calibration is modified if cell temp. rises.