Ultra low temperature Refrigerator

Our ultra low temperature refrigerator has a minimum cooling temperature of -86 ℃, and is often used for frozen storage of vaccines, etc.

Ultra Low Temperature Freezer introduction

The refrigeration system of Ultra low temperature freezer basically adopts the working principle of cascade refrigeration, and selects two fully hermetic compressors as high and low temperature stage compressors. The copper tube of the low temperature evaporator is directly attached to the outside of the inner box in the form of a coil, and the gap between the coil and the box wall is filled with thermal conductive glue to increase the heat exchange effect.

Ultra Low Temperature Freezer working principle

Generally, secondary refrigeration is used, and the temperature sensing probe of the equipment is a thermistor, and different temperatures are displayed on the panel according to the resistance value (ie, the temperature). When the power is turned on, when the panel shows that the temperature is higher than the set temperature, the first-stage compressor starts first, and the first-stage refrigeration system starts to work, so that the condenser temperature of the second-stage refrigeration system drops, that is, the second-stage refrigerant The temperature drops. After a delay of a few minutes, the second-stage refrigeration system also starts to work. Its evaporator is on the inner wall of the refrigerator, which can make the temperature inside the refrigerator drop a lot. The evaporator absorbs the heat, and the heat released by the primary condenser is dissipated into the air.

When the internal temperature of the ultra low temperature refrigerator reaches the set temperature, the resistance of the temperature sensing probe transmits the information, the control relay loses power and disconnects, and the two-stage refrigeration system stops working. When the temperature in the refrigerator rises again and exceeds the set temperature, the refrigerator repeats the above operation process again, so that the temperature in the refrigerator is always maintained at about the set temperature.

Ultra low temperature freezer structure and performance

Ultra low temperature Refrigerator generally has two types of cabinets: horizontal and vertical. The inner box of the Ultra low temperature Refrigerator is generally divided into multiple layers, and each layer is designed with an inner door that can be opened and closed independently. The outer box is generally made of five cold-rolled steel plates directly spliced to each other. The inside and outside of the box are made of 60mm and 80mm polyurethane foam materials. The thermostat is a platinum resistance sensor for precise temperature control. Refrigerants now generally use environmentally friendly refrigerants to meet environmental protection requirements.

External material: painted steel sheet.

Internal material: 304 stainless steel plate.

Insulation material: CFC-free high-density polyurethane foam, 150mm thickness of insulation material, can ensure the stability of the internal temperature.

Ultra low temperature Refrigerator advantages

Temperature control on demand

Microcomputer digital control temperature digital display adjustment unit is 0.1 degrees, the temperature in the box is adjustable; with high and low temperature alarm function. The alarm temperature value can be set as required.

Powerful and efficient cooling system

Ultra-thick foam layer, double-layer insulation door design, effectively protect the temperature in the box; optimized self-cascading refrigeration system, imported compressor, strong and effective cooling capacity; reasonable evaporator design to ensure the most effective flow of refrigerant, inside the box Good temperature uniformity; fluorine-free environmentally friendly mixed refrigerant.

High security

It has a complete alarm system, with buzzer sound and light flashing alarm; it can realize high and low temperature alarm, sensor failure alarm and other functions; multiple protection functions (password protection is frequently activated to protect the refrigeration system from keeping running when the sensor fails).

Humanized design

Built-in stainless steel frame, easy to clean; food-grade stainless steel liner, safe and secure; safety door lock design to prevent random opening; LED temperature display, easy to observe.

Ultra low temperature Refrigerator application

*Ultra low temperature freezer is suitable for scientific research institutions, ultra-low temperature experiments of special materials, electronics industry, chemical industry, military industry, university experiments,

Bioengineering, ocean fishing, etc.

*Because of the working principle of ultra low temperature refrigerator,it can be used to preserve viruses, germs, red blood cells, white blood cells, skin, bones, bacteria, semen, biological products, ocean products, low temperature tests of electronic devices, etc.

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