Introduction
The chiller is a machine that achieves cooling effect through vapor compression or absorption cycles. These liquids can flow through the heat exchanger for the purpose of cooling the air or equipment. Vapor-compression chillers consist of four main components of a vapour compression refrigeration cycle (in the form of compressors, evaporators, condensers, and part metering devices) that can implement different refrigerants. The refrigerant benign silica gel used in the absorption chiller serves as a desiccant. Absorption chillers use water as a refrigerant and rely on water and lithium bromide solutions to achieve a very good refrigeration affinity. In most cases, pure water is chilled, but water may also contain percentages of ethylene glycol and/or corrosion inhibitors; for example, thin oil may be chilled and other liquids.
The unit can provide 0°C~-125°C cryogenic coolant, suitable for the coolant: CaCl2 aqueous solution, ethylene glycol aqueous solution, ternary mixed solution (40% ethylene glycol, 40% water, 40% ethanol), R22 , And other approved refrigerants, suitable for all kinds of places with low temperature cold source requirements, such as the reaction kettle of pharmaceuticals, chemical industry, large cold storage, beverage food industry, wine, skating rink, cascade low-temperature units, etc. .
Low temperature refrigeration unit maintenance
The maintenance of ultra-low temperature freezer units plays a key role in the stable operation of equipment. Therefore, a perfect maintenance system must be established for
This aspect introduces the following points:
(1) Maintenance personnel must be professionally trained to fully grasp the principle and performance of the equipment;
(2) The equipment shall be inspected and maintained strictly in accordance with the specified period, and the operators and maintenance personnel shall be relatively fixed;
(3) The control and sensing elements of the equipment must be regularly calibrated to provide effective safety protection for the unit and obtain objective operational raw data;
(4) The refrigerant and frozen oil required by the equipment shall be filled according to the grade and quantity specified in the operation manual. The grades of the refrigerant and the refrigeration oil shall not be arbitrarily replaced. The filling amount of the low-temperature refrigerant must be strictly controlled, and generally should be 0. .lkg is a unit of measurement and must not be overfilled.