Three methods to determine whether to add refrigerant to the chiller

Three methods to determine whether to add refrigerant to the chiller

Water chiller is an energy-saving machine that achieves 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 the beginning, it can be cooled down and run for a period of time and found that the temperature cannot be reduced. Today, the editor of okmarts.com uses three methods to judge whether the refrigerant is insufficient, and then look for it. 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 too much below the rated value, then refrigerate Too little agent 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 the pressure gauge to the low-pressure valve, and the air conditioner is turned on for refrigeration. The gauge pressure will drop at the beginning. 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 condensed. If the low-pressure pipe also condenses, it will feel cool and the temperature is about 3°C ​​higher 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 condenses, or every time the compressor is started for about 1 minute, the low-pressure pipe frosts and then turns to dew again, it means 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 use the 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, causing the evaporation temperature to drop, the evaporation pressure to drop, the read gauge pressure is too small, and the current is too small. Misjudgment.

Water chillers are mainly used in the plastic industry: plastic molding, injection molding, extrusion, bottle blowing, thermoforming, machinery industry: laser technology, welding, machine cutting processing, non-cutting processing, casting, electroplating, electronic 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 Xian, jewelry processing, leather, fur processing, ink production, breeding industry.