Will the refrigerant return pipe frost if it is added???

Your master is right, if the refrigerant is added, the return pressure will rise, but when judging, it is generally not judged according to the gauge pressure, when the ambient temperature is 30 degrees in summer, the gauge pressure is generally 5kg, add 2 taels of R22, the system pressure will not change much, but it is more obvious in the place of the return pipe, and there will be a little condensation at normal times, and if you add more, it will be iced. If the fluorine is poor, the return pipe will not freeze, but the high-pressure connecting pipe will freeze. Haha, let's experience it carefully in maintenance!

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Oh, thank you, the master will talk about the return pipe and exhaust pipe of less and more fluorine, and the surface temperature of the indoor evaporator, outdoor condenser and compressor and whether there is frost and condensation

Look at what model, some models will frost if the fluorine is less than the outer machine, the thick tube and the liquid storage tank!! View the original post

My master said that when the fluoride deficiency machine runs below 25 degrees Celsius, the return pipe will frost??? View the original post

Your master is wrong!! The frosting of the return air duct must have been refrigerated... It's okay to read more books. I really don't understand. Practice on your own!! Practice makes sense!! View the original post

Adding more back to the air duct does cause frosting, but frost in the back air tube is not a lack of fluoride, 1. The internal evaporator is dirty, the fan speed is low, and the 2 connecting pipes have throttles View the original post

No. Too much refrigerant is added to the pipeline of the freezer system, resulting in incomplete evaporation of the refrigerant, so that the refrigerant is directly discharged from the evaporator in liquid form and continues to evaporate in the return pipe, resulting in low temperature and frost on the surface of the return pipe.

1. If the return air pipe is twisted and deformed by external force, it will be blocked. The specific reason for frosting in the return air duct refers to whether the air volume and wind speed discharged from the air outlet are normal, the coolness of the air outlet, the change of the current of the whole machine and whether the evaporator is frosted.

2. When the freezer starts to run, because the condensation temperature and condensation pressure of the freezer are in a low value state, and the liquid supply of the capillary is lower than the normal value, the evaporation pressure is reduced a lot, so it causes frosting in the low-pressure liquid supply pipe of the freezer. But this kind of frosting to melting is only a short process, generally after the compressor runs to start frosting, within 5 minutes the entire frosting and melting process is over, the freezer enters normal operation, this is normal frosting.

3. When the return air duct is frosted due to the indoor fan, the current of the whole machine is still small, that is, the air output volume is small, and the wind speed is low. After removing the cover and filter, the air volume does not change, but the frost on the evaporator with the chain still does not melt. At this time, it should be turned off and unplugged.

If necessary, the method of separate power supply can be adopted to determine the fault.

No. The possible reasons are: 1. There is a problem with the power plug or socket, or it may be because the power socket has no electricity.

2. It is also possible that there is too much food in the refrigerator, which blocks the air outlet of the cold fan, causing poor cooling effect and poor cooling effect. 3. The refrigerator opens the door too many times, especially when you forget to close the refrigerator door, so that the cold air in the refrigerator will dissipate a lot, so the refrigeration effect of the refrigerator will be poor. 4. The freon in the refrigerator may be leaked or the freon is insufficient.

Frosting in the refrigerator return duct may be due to a low amount of refrigerant. The amount of refrigerant in the refrigerator is small, and the evaporation pressure of the evaporator is low, which leads to the low evaporation temperature, which will also cause the evaporator to condense and form a thermal insulation layer, so as to transfer the expansion point to the return air of the compressor, resulting in frosting of the return air of the compressor.

Evaporator failure. Because the evaporator is faulty, the evaporator cannot absorb heat normally, or the cold energy generated by the evaporator cannot be transmitted. The temperature and pressure of the liquid are normal or slightly low, and frost gradually forms from the return port of the compressor to the direction of the evaporator.

The pressure of the expansion valve is on the low side. The amount of refrigerant liquid flowing through the throttle valve at the initial throttle opening will be more than normal, so more heat will need to be absorbed from the evaporator, and if the evaporator does not fully absorb enough heat, it will cause the temperature of the compressor return pipe to be low. At the same time, due to the low pressure at the front end of the throttle valve, the pressure at the back end of the macro flow valve will also be low, if the return pipe system of the refrigerator uses an expansion valve, the opening will not be adjusted much compared with the normal state, and the low pressure will be maintained until the compressor return air frosts.