Three methods to determine whether to add refrigerant to the chiller

　　【】The chiller is an energy-saving machine that achieves the cooling effect through vapor compression or absorption cycle. Billion times chiller is called cooling water cycle machine, also called chiller, chiller, freezer, chiller, chiller, small chiller, industrial chiller, chiller, low temperature chiller, laser chiller, because of various industries Is widely used, so according to different industries, its aliases are countless.

　　 Many users will find that the chiller is insufficient in the process of using the chiller. At first, it can be cooled down and run for a period of time. After a period of time, it is found that the temperature cannot be lowered. Insufficient, then look for other reasons.

　　 1. Current method: Use a clamp-on ammeter to monitor the working current of the outdoor unit (including compressor and fan current). If the current value is basically in line with the rated current on the nameplate, the refrigerant is suitable; if it is lower than If the rated value is too much, the refrigerant is too little and needs to be added.

　　 2. Gauge pressure method: The pressure on the low pressure side of the refrigeration system is related to the amount of refrigerant. Connect a pressure gauge to the low-pressure valve, and the air conditioner is turned on for refrigeration. At the beginning, the gauge pressure will drop. After running for more than 10 minutes, it is normal if the gauge pressure is stable at about 0.49Mpa.

　　 3. Observation method: Observe the condensation of the high-pressure pipe near the high-pressure valve of the outdoor unit and the low-pressure pipe near the low-pressure valve. Generally, the high-pressure pipe is cold and condenses. If the low-pressure pipe also condenses, it has a cool feeling, and the temperature is about 3°C u200bu200bhigher than that of the high-pressure pipe, indicating that the refrigerant is suitable. If the low-pressure pipe does not condense and there is a sense of temperature, it means that the amount of refrigerant is insufficient and needs to be added; if the low-pressure pipe is condensed, or every time the compressor is started for about 1 minute, the low-pressure pipe is frosted and then turns to dew again. Too much refrigerant needs to be let go.

　　The above three methods are mainly based on measuring current and observing the condensation of high pressure and low pressure pipes, and also use gauge pressure method to determine whether to add refrigerant. It should be noted that when the air conditioner is cooling, the outdoor fan must be turned on, otherwise the cold air around the evaporator will not disperse in time, which will reduce the evaporation temperature and the evaporation pressure, and the reading of the gauge pressure will be too small and the current will be too small. Misjudgment.

　　 water chillers are mainly used in the plastic industry: plastic molding, injection molding, extrusion, blow molding, thermoforming, machinery industry: laser technology, welding, machine cutting processing, non-cutting processing, casting, electroplating, Electronics industry: surface treatment, electroplating, electrophoresis, medical equipment, electronics industry, circuit board production, electronic chip manufacturing, chemical industry and other industries: chemical industry, papermaking, pharmaceutical industry, food processing industry, aluminum profile, aluminum alloy, tempered glass , Coated glass production, ultrasonic cleaning, s* decoration processing, leather, fur processing, ink production, breeding industry.