How to add fluorine refrigerant central air conditioning

the central air conditioning and fluorine refrigerant methods:

1, quantitative and fluorine in tee valve process cohesion good three-way valve, pressure gauge, plus fluorine hose, fluorine bottle or vacuum pump, etc. Put fluoride after pumping air into vacuum state, beginning gradually add fluoride. More accurate measuring things weighing with the platform scale, when fluoride fluoride on the number of cuts in bottle is air conditioning standard and amount of fluorine, the plate of fluorine valve door. 2, test current will air conditioning setting in the cooling or heating high wind conditions ( Frequency conversion air conditioning set in operation condition) Homework, under low pressure cut-off valve mouth, add fluoride while investigating clip-on ammeter change, when no air conditioning at the current value of the additional activities, calibration plate of fluorine valve door. Homework at the moment, let air conditioning through a period of time, when the cooling conditions under room temperature approached 27 ℃ or room temperature under heating conditions near 20 ℃, consider the air temperature, power grid voltage outdoor bump level affect the elements of current extra homework, fine-tuning together with the amount of fluorine to current value extra homework, do it right and fluorine. To fine-tune the reason is that extra homework current value calibration plate of air conditioning is air conditioning factory test data in the following conditions: the refrigeration condition, power supply voltage 220 v or 380 v electric fan speed wind, indoor air temperature is 27 ℃, outdoor air temperature 35 ℃; Heating conditions, the power supply voltage 220 v or 380 v electric fan speed wind, indoor air temperature is 20 ℃, outdoor air temperature 7 ℃. Practice summary data of fine-tuning is: cooling condition, on the basis of outdoor air temperature 35 ℃. Outdoor temperature rise or fall of every 1 ℃, add or reduce extra homework current value of 1. 4%; Heating conditions, on the basis of outdoor air temperature 7 ℃, the temperature outside every rise or fall of 1 ℃, add or cut an additional 1% of the current value; Cooling or heating conditions, with additional power voltage 220 v or 380 v as the standard, the power supply voltage rise or fall of 1 v, for each cut or add extra homework current value. 3, pressure measurement method puts air-conditioning refrigeration high wind conditions ( Winter, the heating requirements plus fluoride, set the air conditioning in forced cooling condition or placed at room temperature sensor in around 27 ℃ warm water, imitate the summer temperature make the air conditioning refrigeration condition) Homework, under low pressure cut-off valve technology, add fluoride and investigate the low pressure vacuum gauge, when low pressure at 0. 49MPa( In the summer) Or 0. 25MPa( Winter) And fluorine valve door. Consider the air temperature is concave and convex outdoor, indoor cooling load low pressure influence elements such as intrusive, and fine-tune the quantity of freon and the pressure on the table, do it right and fluorine. Fine-tuning of the reason for low pressure is proportional to the indoor cooling load, the cooling load, the greater the pressure is higher, whereas the lower; Fluoridated process and all round pipe mouth, because install outside, the pressure and the evaporation temperature is highly affected by the outside temperature, indoor heat exchanger practice stress and transpiration are more high temperature in summer, winter will is low. Practice summary in the fan speed wind, indoor temperature is 27 ℃, under the condition of low pressure data as shown in table. 4, survey method, set the air conditioning in the cooling or heating high-speed wind conditions, add right amount of fluorine in the indoor heat exchanger into and out of 10 cm FengKouChu temperature difference is: when the refrigeration is greater than 12 ℃, greater than 16 ℃ when heating; Refrigeration, indoor heat exchanger, transpiration condensation all sound depression, outdoor cut-off valve ChuJie condensation dripping dew, summer barrage, indoor heat exchanger with the capillary cohesion place frost-free dew, etc. ; When heating, the indoor heat exchanger wall temperature is greater than 40 ℃. Repair in practice, the frequency conversion air conditioning with equal to add the correctness of the amount of fluorine requirement is high, or the air conditioning that decide frequency because of the vacuum cooling pipe system, appropriate USES quantitative add fluoride solution. If the piping system need to add fluoride, appropriate is used to measure current supplemented, gauge pressure, both survey method.

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