Each cycle of the Oklon ultra-low temperature cascade chiller is a complete single-stage compression refrigeration system. Usually, refrigerants with higher boiling points (medium temperature and medium pressure refrigerants) are used in high-temperature systems, while refrigerants with lower boiling points are used in low-temperature systems. The two parts of the cascade chiller are connected by a special device - the evaporator condenser. The evaporation of the high-temperature refrigerant is used to condense the low-temperature refrigerant, and heat transfer between the two parts of the chiller is achieved through the evaporator condenser. The refrigerant in the high-temperature part is released to the environmental medium - water or air - through its own system's condenser, while the low-temperature part absorbs the heat of the cooled object through its own system's evaporator.

Oklon cascade chillers are also known as cascade freezers, ethylene glycol freezers, alcohol freezers, cascade compression freezers, and cascade compression freezers due to their unique system composition. It can be widely used in various fields such as rubber, plastic, petroleum, chemical, electronics, papermaking, textile, brewing, pharmaceuticals, food, machinery, beverages, vacuum coating, electroplating, ink printing, central air conditioning, etc. At the same time, special industrial stacked ultra-low temperature chillers can be designed according to usage requirements, including ultra-low temperature, anti-corrosion, and explosion-proof types, to meet the requirements of various industries for process cooling sources.

At the same time, there are various forms of the Oklon cascade chiller cycle, such as the cascade of two single-stage compression cycles, the cascade of two-stage compression cycles, and the cascade of three single-stage compression cycles. The specific choice of which one to use depends on the actual situation of the user unit. The cascade chiller refrigeration cycle is widely used in high-tech fields due to its compact structure, high reliability, and easy operation.