Extremely fast freezing, low-temperature blast freezer

A system, comprising:

• a plurality of shelves in a payload bay surrounded by insulation acting as a thermal barrier between the payload bay and the outside environment;
• a plurality of evaporators coupled to the payload bay with a multiplicity of coolant tubes in each evaporator, further comprising one or more cryogenic solenoid valves coupled to the coolant tubes;
• a liquid nitrogen source to circulate a predetermined amount of coolant at a predetermined pressure to drive a predetermined coolant flow through the plurality of evaporators with coolant tubes;
• a thermal barrier isolating thermal flow between the payload bay and a main door where the thermal barrier comprises a gap with a non-metal material attached to both sides of the gap;
• an inner door and a pneumatic seal providing an airtight seal between the main door and the payload bay;
• a plurality of fans to circulate convective cooled air in the payload bay;
• and
• an external fan that forces air through a room heat exchanger.