Evaporator: This is the facility which produces the cooling effect. It is a heat exchanger in which heat or local chamber passes into the evaporator as a result of boiling of refrigerant in the refrigerant interior.El and expands, enters the evaporator pressure and temperature needed to which carries a cooling medium that rodea.El material has to be good conductor of heat, so that more trade is conducted heat posible.No have to necessarily be installed inside the enclosure to be cooled. Evapo flooded: - The refrigerant is in liquid state throughout the transmission. In the evaporator inlet and outlet fluid mixture of liquid and gas, but with a significant percentage of liquid. "They are high performance evaporators, as if after the fluid is completely liquid, the temperature difference between fluid and cool the medium is constant. "The type of expansion device usually by float level regulators.Evapo finned tube: - For the same capacity with smaller wings is achieved because the surface is transmitted over the tube fins. -The fins may be of various shapes (circular, square, etc.).. These are attached to the tube by a mechanical process that involves the widening of the tube by passing through it acero.Los ball air circuits through these evaporators can be: natural: - The air circulating in the density difference different points, establishing convection currents. "He mounted on the ceiling or along the wall of the room to be cooled. "The cold air coming from the evaporator, when in contact with the product to be cooled is heated by heat transfer and this rises again to the evaporator, which cools, falling back on the product to cool.Forced: "The entry and exit of air is produced by fans. "So the separation between the fins is smaller than in the natural. "The arrangement of tubes is staggered. Ensuring that handle all the air through the evaporator, cools as it is in contact with the whole section of the coil. Expancion straightforward: The evaporator cools the camera directly, either because it is installed inside or in an annex, the evaporator would be installed in an adjoining and air discharge is through a tube that has vents for air flow. This will get an even distribution of air to drive. The return air will also be driven by another conduit to the evaporator, used in cameras considerable height or the storage characteristics of the product. Expansion indirectNeed a secondary circuit to maintain the required temperature inside the enclosure, is used when the camera is at a considerable distance from the compressor. Difference between frigorifero and refrigerant: frigories genome: cooling coil produced in the primary circuit (evaporator of the refrigeration circuit ), then uses the latent heat to produce cold. frigories fero: cooling coil is produced by the secondary circuit for using the heat sensitive to cold production. Ke is the defrost: is to kill frost ke occurs in the evaporator, ke xke occurs inside the camera and humid air is passed through the coil fan driven water droplets are deposited on the surface of the cooling tube and form frost.Influence of pressure and oil in the evaporator: The performance of the evaporator has a direct relationship with the suction pressure: "If the suction pressure increases, also increases the pressure and temperature of the fluid inside the evaporator is reduced the temperature difference between fluid and abroad. In this case the yield decreases. "If the suction pressure decreases, so does the temperature and pressure of the fluid, the temperature difference between the external environment and the fluid increases. This ria as an increase in evaporator performance. Fan-coil (fan-coil): - Cleaning of filters, because a dirty filter reduces airflow and dirties the coil, which means reduced power. - Verification of good evacuation of the capacitors. - Oil engine (bearings) if necessary. - Verification of the electrical consumption.