Figure 1: A man is adding the Freon to the refrigerator compressor.
As we all know, the most important reason why refrigerators and air conditioners can be cooling is that the Freon. Freon is colorless, odorless, non-toxic, and easy to volatilization at room temperature, with stable chemical properties. Today I'm going to explain to you how to put the freon in the refrigerator compressor.
Because CFC refrigerants can destroy the atmospheric ozone layer, their use has been restricted. There have been many holes in the ozone layer on earth, some of which are larger than the area of Africa. The Freon is widely used as the refrigerant in refrigerators and air conditioners because of its stable chemical properties, low toxicity, low dielectric constant, high critical temperature, and ease to liquefy.
Directly connect to the Freon.
Open the refrigerator power supply to run the compressor.
Open the Freon valve.
Cover the head after finishing.
Use a cup of water to test whether the head leaks.
First open the interface and weld it with the head.
The whole process should take less than half an hour. You first open the interface of the Freon, release the freon inside, then use a special compressor to vacuum repeatedly, and then finally start adding the freon.
If you need to put the freon to your refrigerator, please ask a professional refrigeration maintenance personnel for help.
If the refrigerator is not cooling, it needs to be added with the freon, which also means that the refrigerator leaks. If you want to add the freon to the refrigerator, you should first check the location of the leakage in the refrigerator. Whether it is to check the leakage or for the supplement, you should ask a professional maintenance man.
Besides, the refrigerator that is not used for a long time also can make pipeline system occur leakage. This is because the pipes of some refrigerators are aluminum tubes, which are easy to leak due to leaving unused for a long time.
You should first determine whether it is an outside leakage or an inside leakage. Remedial action can be taken first if the refrigerator is leaking. After you solve the leak, check again for other leaks. Once you are sure there are no leaks, you can start vacuuming.
We have summarized two methods of putting the freon for you.
Figure 2: The refrigerator compressor leakage.
You connect the liquid feeding pipe with the process port of the compressor, and vacuum first, and decide the vacuum time according to the situation of the process port during maintenance.
If there is still gas in the broken process, you can vacuum for 5-10 minutes; If no gas, you should vacuum for 20 to 30 minutes. After the equipment is in a vacuum for 5 minutes, you should start the compressor to run for 3-5 minutes.
After that, you should first close the maintenance valve and then stop the vacuum pump, quickly connect the liquid feeding pipe to the freon bottle, open the valve. According to your own habits, it’s okay to put the bottle inverted or vertical.
You should slightly loosen the nozzle of the feeding pipe of the half-circle of the maintenance valve, use the freon pressure to overflow the air in this section, and tighten the connection mouth after about 2-3 seconds.
You can use the pressure difference after vacuum to stop the compressor and fill it with freon. You should open the feeding valve for about a quarter turn, close it after 5-6 seconds, and wait another 2 minutes to start the compressor, at which time the low-pressure gauge will drop rapidly.
If the index is below 0, the amount of the freon is not enough. At this point, you can slightly open the refueling valve to refill the freon. If the pressure is less than 1kg, you can keep the refrigerator running. During the test run, you should observe the frosting of the evaporator. First, you feel the heat dissipation of the condenser and the temperature of the return pipe.
If the return pipe frosts, you should open the feeding valve and release the freon several times until there is no frosting. If the pressure gradually decreases to negative and the compressor makes a dull sound, it indicates that the ice blocking occurs, and corresponding solutions should be taken.
Figure 3: The return pipe is frosting.
After you test the machine for about half an hour, the evaporator should be full of frost, the heat dissipation of the condenser should be normal, the return pipe gradually cools to slightly dew. And it can automatically stop after 1 hour. The rule of starting and stopping is normal, then the whole process of adding the freon is completed and the amount is appropriate.
You should add the Freon according to the refrigerator nameplate, and by the use of electronic scale, and judge whether the refrigerator is normal by adopting the above method.