The open type coolers are insulated (except the top cover) and automated systems. Equipped with a stirrer connected to a motor reducer to provide a regulatory speed of rotation of the stirrer, which is 23 Rev/min Stirring milk promotes uniform cooling and eliminates the icing on the tank walls. Rinsing is carried out manually by employees of the farm. The milk cooler open type with direct cooling system is equipped with a condensing unit connected to copper pipes to the evaporator, located on the walls of the container. It is the vaporizer ultimately provides cooling of the walls of the vessel. And they, in turn, cool the milk.