THERMAL CONDITIONING DEVICE FOR COOLING-HEATING PLANT Russian patent published in 2019 - IPC F25B49/02 F25B29/00 F25B25/00 

FIELD: electrical engineering.

SUBSTANCE: invention relates to thermal conditioning devices for a cooling-heating plant. Thermal conditioning device for cooling-heating plant includes external temperature sensor 1, which is installed outside of refrigerating-heating plant 2, Schmitt trigger 3, which input is connected to output of ambient temperature sensor 1, switch 4, the second input of which is connected to the output of thermostat 5 of refrigerating-heating plant 2, installed in the product storage chamber 6, and the first output of which is connected to the inlet of compressor 7 of refrigerating-heating plant 2, and inverter 8, input of which is connected to second output of switch 4 and output of which is connected to input of heater 9, which is installed in chamber 6 for storage of product of refrigerating-heating plant 2. Input of comparator 11 is connected to output of ambient temperature sensor 1. First input of first element "or" 12 is connected to output of comparator 11, and second input to output of Schmitt trigger 3. Input of electric signal delay unit 13 is connected to output of Schmitt trigger 3, and output to third input of first element "or" 12.

EFFECT: providing automatic protection of the compressor of the refrigerating-heating plant from failure caused by lowering the ambient temperature to values at which the compressor should not be started, and/or triggered by incorrect operation of external temperature sensor, which can occur due to sensor failure, and/or provoked by abrupt and differently directed ambient temperature changes.

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