I. Fluorinated deficiency in air conditioning
After 30 minutes of continuous operation of the compressor, if the refrigeration system is “fluorinated”, the following occurs:
1. The valve is dry, and there is no apparent cooling on hand. This is due to the fact that inadequate refrigerants lead to earlier boiling endpoints in the evaporation unit, resulting in an excessive increase in the valve's refrigerants and an increase in the temperature of the valves, which is greater than the leak in the outdoor air。
2. Fluid valve frosting. This is due to lower internal pressure in the fluid pipe due to a “fluorinated shortage” and lower boiling point resulting in lower valve temperatures than the ice point。
3. Open the interior panel and remove the filtration net so that some evaporation or frost can be found. This is due to the fact that, due to the lack of refrigerants, only part of the evaporation unit suffered from boiling inhalation, resulting in a corresponding reduction in refrigeration area。
4. There is no heat on the outdoors. This is due to reduced condensation pressure due to inadequate refrigerants, lower condensation temperatures and lower ventilation temperatures。
5. Drainage is intermittent or non-existent. This is due to a reduction in the evaporation unit's refrigeration area, a decrease in the evaporation area and a decrease in the volume of condensed water。
6. Outdoor gas and liquid valves are oily and leaky. This is due to the degree of solubility between refrigerants and refrigerated oils, where fluorine escapes from the leak point and enters the atmosphere, and the oil is attached to the spill point。
7. Measurement of working currents of air conditioners less than rated currents. This is due to reduced compressor loads and reduced currents due to inadequate refrigerants。
8 the pressure measured from the fluorine recharge of outdoor machines is less than 0. 45 mpa. This is due to the reduction of evaporation pressure due to inadequate refrigerants. Hq gko cautioned that any valve frost in an outdoor machine is abnormal; only liquid valve frost indicates “fluorinated shortage”; only gas valve frost indicates a slight “fluorinated” or ambient temperature deficiency; and both valves indicate a secondary circulation in the system。
Ii. Fluorinated equipment:
Refrigerants (model based on home-based refrigeration equipment)
2. Fluorinated tubes
Three valves for vacuum pressure meters
4 open valve (open valve)
Operation of "air conditioning fluorine"
1. Connect refrigerant steel cylinders with fluorinated hoses, repair tables and fluorinated vents to exclude air within the hoses。
2. Commencing compressors to charge refrigerant gases with the difference between steel cylinders and the pressure of the refrigeration system (if the refrigeration system pre-empts a vacuum, the refrigerant gas should first be filled with the stoppage and the re-launching of fluorine should the pressure pointer not rise)
Observation of changes in pressure gauges during fluorine recharge. Keep pressure table pointers within 0. 45-0. 5 mpa by intermittent fluorine recharge。
After 30 minutes of commissioning, the air conditioners shall have the normal state of operation described above。
5. The leaks are checked with a scrubber。
Air-conditioning fluorinated method (hbac) for example f22 freon
Preparation for fluorine:
First, the double-head pressure table is connected to the fluorine tube
2. Yellow process tubes interface with fluorine bottles
3. Dismantling the air conditioner three repair valves
4 - air conditioner 3-barrel inner valve
5 - air-conditioning and fluorinated tube inner tops a needle
6. Three-barrel process for blue tubes mouth
Seven, then open the fluorine valves and lower the two-faced low-pressure fluorine, remove the fluorine tubes from the air on the fluorine table for about five seconds and tighten them until three valves are opened。
At this point, the ac plus fluorine determination can be run:
1. Based on the reading of the pressure sheet。
Listening to compressors, fluorinated, heavy compressors, silhouetted and less, general compressors have a normal load, more possibly damaging compressors and less likely to have a "frigeration effect" less。
3. It would be preferable to test the working currents of compressors if there were current meters, and to judge fluorine more accurately。
4. See the coolness of indoor aircraft, usually between 8 and 15 °c. (specialized test table with thermostat)
Iv. Types of domestic air-conditioning refrigerants
In the domestic air conditioners we use, refrigerants usually include r22, r32, r290 and r410a, each with advantages and disadvantages:
Of the four refrigerants listed above, priority was given to r32 for higher value, followed by r410a。
V. Home air conditioning maintenance attention: air conditioners require fluoride after several years of use, many of them are only expensive and inaccurate after being educated by maintenance masters about common refrigerants, environmentally friendly refrigerants, efficient refrigerants, and virtually every air conditioner leaves the plant with a clear indication of the type and weight of the refrigerant on the outdoor board, which may not be felt in the event of leakage due to different types of refrigerant pressure and boiling points, and there may also be adverse chemical reactions that not only affect refrigeration effects but may also produce harmful substances, so the choice of refrigerants for adding fluoride is the same as the original refrigerant type。
Vi. The number of air conditioners is mainly related to the volume of refrigeration and heat, and the larger the number, the better:
Vii. There will also be differences in the corresponding cooling heat, depending on the brand。
The selection of air conditioners is based primarily on size, with the typical cooling requirement of 1m2 typically around 150-220w, and the specific cooling requirement is mainly related to outdoor temperatures and whether we are afraid of heat. For example, an indoor space of about 15m2 is in the middle of one and 1. 5 places that can be covered, and it would be better to recommend 1. 5 chillers for air conditioning if you were in the longer-temperature zone, and if you were in general more hot。
Specific cooling areas can be referred to in the table above。
