FREEZE DRYING SYSTEM Russian patent published in 2022 - IPC F26B19/00 

FIELD: food industry.

SUBSTANCE: invention relates to the food industry for drying food and other materials and substances from which it is necessary to remove moisture at low temperature. The system contains a main recuperative heater, an auxiliary recuperative heater and a safety system, while the main recuperative heater is a condenser of the high-temperature cascade of the heat pump of the drying chamber, containing an air condenser built into the discharge line of the high-temperature cascade in parallel with the main heat exchanger of the air condenser, consisting of two heat exchangers , the auxiliary recuperative heater includes a compressor connected to the pre-cooler heat exchanger and the interstage heat exchanger, and the heat exchanger coolant through the circulation pump is connected to the buffer tank connected through the second circulation pump to the heat exchanger, which is a fan coil unit, a low-temperature cascade safety system interacting with the suction and discharge lines , installed at the outlet of the expansion tank, which communicates with the suction line through a check valve and The valve is normally closed and a normally open valve is installed between the discharge line and the expansion tank.

EFFECT: carrying out the drying process with high efficiency.

1 cl, 1 dwg