Where are the dirty jams usually blocked? How to judge if the refrigerator is dirty?

As the refrigerator is used for a long time, various problems and faults will occur to some extent, such as loud noise, no refrigeration, no compressor being shut down, etc. Today we want to talk about the problem of dirty and blocked refrigerators. Xiaobian believes that many people don’t understand this situation. What is going on? When it comes to dirty blockages, we have to talk about the ice blockages.

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The locations of dirty plugs and ice plugs are different. The dirty plugs are generally at the inlet of the capillary tube (connected with the filter) and the ice plugs are at the outlet of the capillary tube.

The refrigeration system of the ice-blocked refrigerator is normal when it is first turned on, but shortly after the beginning of the evaporator begins to frost, when the water present in the refrigeration system passes through this place, the water vapor will be turned into ice, causing the refrigeration system to be blocked. Then the temperature of the evaporator begins to rise. When the ice blocked at the outlet of the capillary tube melts away, the refrigeration system will return to normal. Of course, if some refrigerators can see the outlet of the capillary tube, when the refrigeration system is blocked with ice, a hot towel can also be applied to it to promote the ice to melt away and the refrigeration system will return to normal.

Methods to deal with ice jams: 1: The easiest method is to add methanol. However, this potion has a certain degree of corruption and turbidity. After using this potion, it will cause certain damage to the life of the refrigeration system!

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2. Use the drying method. First, enter 0. 8MPA of nitrogen, place it in the refrigerator with two 100W lamps, close the door and dry it for a period of time (be careful not to melt the plastic in the box because the time is too long), so that the water in the refrigeration tube is heated,(The pressure in the tube is 0. At 8MPA, the boiling point of water will also rise, and the temperature of water will also be above 100 degrees). Then use the neutral flame of gas welding to heat the compressor evenly for 3 minutes, and then quickly deflate the nitrogen in the refrigeration system. At this time, the pressure in the system suddenly drops, and the boiling point of the water inside will also decrease, promoting the water It is vaporized and discharged out of the machine with the nitrogen. (You can ignore it at the condenser end.) I have used this method successfully for many years, and the results are very good.

Dirty clogging: Generally, only the filter is replaced, and then the capillary tube is cut off by 3 to 4 centimeters. If it is blocked in the middle of the capillary tube, the capillary tube can be straightened, high-pressure nitrogen gas should be poured into the return tube, and then use a neutral flame of a welding gun to heat the capillary tube. If the dirty things in the capillary tube cannot be discharged, the only way to replace the capillary tube.

Some maintenance masters generally use this method to determine whether the capillary tube is dirty and blocked. First, connect a meter to the process tube and then fill it with high-pressure nitrogen gas, and keep it for a while. Then open the meter and let out the nitrogen inside. When no gas is exhausted with your hands, close the meter immediately. After a few seconds, open it and there should be obvious gas discharge,(it is also obvious that the gas discharge can be heard). Explain that the capillary tube is not dirty.

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The principle is that when nitrogen is poured in, nitrogen enters the condenser through the compressor exhaust port and capillary tube. However, when nitrogen is discharged from the machine, the nitrogen in the evaporator and the compressor is quickly discharged outside the machine through the process tube. However, the nitrogen station in the condenser can only slowly pass through the capillary tube to the evaporator and then to the compressor before it can be discharged outside the machine. Therefore, when the nitrogen from the evaporator and compressor is exhausted, the nitrogen in the condenser is not exhausted yet. When the process tube is closed, The nitrogen in the condensation will pass through the capillary tube to the evaporator and compressor, so when the meter is pressed again, gas will be discharged again. In addition, this method can also be used to check whether the capillary tube is blocked.

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