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What are the factors that affect the evaporation temperature of lab water chiller?

Industry News 2670

  What are the factors that affect the evaporation temperature of lab water chiller?

  The factors that affect the evaporation temperature of laboratory chillers include the following: oil accumulation in the evaporator pipeline: Under normal circumstances, due to the mutual solubility of lubricating oil and Freon, no oil film will form on the surface of the heat exchanger, and the thermal resistance of the oil film may not be considered. However, when adding lubricating oil, lubricating oil with the same grade as the original must be selected to prevent the formation of oil film.

  Air filter clogged: The filter must be replaced regularly to ensure the required circulating air volume for the air conditioner. Blocking of the drying filter: To ensure the normal circulation of the refrigerant, the refrigeration system must be kept clean and dry. If there are impurities in the system, it will cause clogging of the drying filter, making it difficult to supply liquid to the system and affecting the refrigeration effect. There is too little refrigerant, add Freon.

  The temperature condition of the laboratory chiller evaporator: Under normal circumstances, the outer surface of the evaporator is very cold, and the condensed water droplets continuously drip down. The inlet and outlet air temperature is relatively high, usually Δ Under abnormal circumstances, the surface of the evaporator may not be too cold, there may not be much dew, or condensation may occur. The sound of refrigerant flow can be heard, and the temperature difference between the inlet and outlet air is small. The reason is insufficient refrigeration dosage or low opening of the expansion valve.

  Blocking of the drying filter: To ensure the normal circulation of the refrigerant, the refrigeration system must be kept clean and dry. If there are impurities in the system, it will cause clogging of the drying filter, making it difficult to supply liquid to the system and affecting the refrigeration effect.

  Evaporator pipeline oil accumulation: Under normal circumstances, due to the mutual solubility of lubricating oil and Freon, no oil film will form on the surface of the heat exchanger, and the thermal resistance of the oil film may not be considered. However, when adding lubricating oil, lubricating oil with the same grade as the original must be selected to prevent the formation of oil film.

  Evaporator temperature condition: Under normal circumstances, the outer surface of the evaporator is very cold, and the condensed water droplets continuously drip down. The temperature of the inlet and outlet air is relatively high. Under abnormal circumstances, the surface of the evaporator is not too cold, and there is not much dew or condensation. A loud sound of refrigerant flow can be heard, and the temperature difference between the inlet and outlet air is small.

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