Deep freezing tunnel is very important elemement in fishery production. The fish is frozen rapidly due to intense air flow and lowtemperatures on the evaporator. The duration of freezing is an hour per tonne. The projected evaporation temperature of the refrigerant in deep freezing tunnel is -42°C. The fish thatis entering the tunnel is previously cooled during transport to the temperature of 1°C. This way of handling the fish, called. "shock freezing" ensures high quality of fishery products due to the formation of small crystals that do not harm the membrane of tissue. Tunnel conditionsare provided with two evaporators at total output of 98 kW. Used refrigerant is ammonia, and thus low evaporationtemperature is ensured with two-stage compression and two-stage damping. After the freezing process is complete, the fish is transported to the cold stores. Cold stores are important for the conservation of the quality achieved in the previous process. Evaporation temperature of refrigerant in freezers is -32 ° C. Conditions in stores are ensured with two evaporators at total output of 36 kW. Refrigerant is R404A. In the introductionare summarized types of cold stores, freezing and storage methods and the influencing factors on the quality of the fish. Also is made estimation of cooling loadfor cold stores and deep freezing tunnel and estimation of technical components for both systems. Finally are presented schemes ofconnection and automatic control and disposition drawing of engine room for both systems