Medical ultra-low temperature freezer, with ISO9001 quality management system certification, EU certification, patent certificate, etc., adopts a unique single throttling mixed refrigeration cycle design. Efficient forced cooling, low noise, energy-saving; Green and environmentally friendly refrigerant. Adopting electronic temperature controller, microcomputer control, digital display, PT100 sensor, more precise temperature control, temperature can be adjusted from -40 ° C to -86 ° C.