How to choose the type of -80℃ ultra-low temperature industrial freezer? Do you know that?/You know what?

Refrigerator is a machine that achieves refrigeration effect through vapor compression or absorption cycle. These liquids can flow through a heat exchanger to cool air or equipment. The vapor compression refrigerator includes four main components of the vapor compression refrigeration cycle (in the form of compressor, evaporator, condenser and some metering devices), and these machines can realize different refrigerants. Refrigerant used in absorption refrigerator and benign silica gel used in urban water are used as desiccant. The absorption refrigerator takes water as the refrigerant and achieves the refrigeration effect by the affinity between water and lithium bromide solution. In most cases, pure water is frozen, but water may also contain a certain percentage of ethylene glycol and/or corrosion inhibitor; Liquids such as thin oil can be frozen.

Selection of cryocooler and cryocooler.

Chiller is a kind of water-cooling equipment, which can provide constant temperature, constant current and constant pressure cooling water equipment.

Selection of cryocooler and cryocooler.

Constant temperature, constant current and constant pressure cooling water equipment in this section.

The working principle of the water cooler is to inject a certain amount of water into the water tank in the machine, cool the water through the water cooler refrigeration system, and then send the low-temperature cooling water to the equipment through the water pump for cooling. The chilled water of the water cooler takes away the heat, and then the temperature rises and flows back to the water tank to achieve the cooling effect.

Selection of cryocooler and cryocooler.

Use air conditioning

In air conditioning systems, cooling water is usually distributed to heat exchangers, coils in air handling devices, or other types of terminal equipment, and cooled in their respective spaces (S air), and then the cooling water is redistributed back to be cooled. These cooling coils transfer sensible heat and latent heat in the air to cooling water, so the cooling air flow is usually dehumidified. The cooling capacity of a typical air-conditioning unit is 15 to 1500 tons (180000 18000000 British thermal units/hour or 53 to 5300 kilowatts). The cooling water temperature ranges from 35 to 45 degrees Fahrenheit or 1.5 to 7 degrees Celsius, depending on the application requirements.

Selection of cryocooler and cryocooler.

Samsara system

In the refrigerant circulation system of water chillers, the liquid refrigerant in the evaporator absorbs the heat in the water and begins to evaporate. The good refrigerant forms a certain temperature difference with water, and the liquid refrigerant is completely evaporated into a gas state and then sucked and compressed by the compressor. The gaseous refrigerant absorbs heat through the condenser and condenses into liquid. Throttled by the thermal expansion valve, it becomes a low-temperature and low-pressure refrigerant, which enters the evaporator to complete the refrigerant circulation process.