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The commercial refrigeration of cooling air evaporator
The commercial refrigeration of cooling air evaporator
The evaporator of cooling air uses refrigerant to evaporate in the tube to directly cool the air. There are two types of evaporators: cooling coil and air cooler.
1) The refrigerant in the evaporator cooled by natural convection evaporates in the tube, and the flow of air outside the tube is natural convection. The cooling coil is mostly composed of finned tubes. For the commercial refrigeration of ammonia refrigeration systems, steel pipes are used, and finned tubes are generally used. For Freon refrigeration systems, copper pipes are mostly used, and the finned tubes can be coiled or finned. Some cooling coils can also be made of smooth tubes. Cooling coils can be divided into wall coils, top coils and shelf coils according to their indoor installation methods. Shown is the coil type evaporator commonly used in refrigeration, referred to as the evaporating coil. It is placed in commercial refrigeration and becomes the air cooling coil of commercial refrigeration, which can realize commercial refrigeration cooling. In the display cooler or showcase, the display cooler or showcase can also be cooled. This type of evaporator relies on natural convection of air to exchange heat, with low heat exchange efficiency and slow cooling speed, but the coil structure is simple and easy to install.
2) The evaporator for cooling the forced air is often used together with the fan, so it is often called the air cooler. The fan blows the air into the evaporator at a high speed, and the air is continuously cooled during the flow, and then sent to the commercial refrigeration or display cooler and showcase. Because the air is forced to convection through the evaporator, the heat exchange efficiency is high, the commercial refrigeration or display cooler cools quickly, and the temperature distribution is relatively uniform.
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