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The structure of the refrigerator is complicated, and the causes of some kind of failure may be various. Practice has proved that the correct use of the "view, smell, ask" method can effectively analyze the cause of the failure.
1. "Wang": refers to the use of the eye to observe or use the meter to measure the various parts of the refrigerator. Use a multimeter to check the height of the power supply voltage and whether the motor winding resistance is normal. Use a megohmmeter to measure whether the insulation resistance of the refrigerator is above 2MΩ. If all the indicators are normal, you can power on the test run.
Use an ammeter to measure the amount of starting current and running current, then open the door to see the frosting of the evaporator. If the current value does not meet the requirements or the evaporator frost is uneven (or not completely frosted), it is not normal. Using a thermometer to measure the cooling rate in the refrigerator, if the cooling rate is significantly slower than usual, it is an anomaly. Observe whether the capillary tube and the drying filter are condensed, whether the compressor suction tube is frosted, and whether the door around the box is condensed, thereby judging whether the refrigeration line is blocked, whether the refrigerant is excessive, and whether the capillary is faulty. Check the surface of the refrigeration system piping (especially at the joints) for signs of oil contamination. If there is oil, indicate a leak.
2. "Smell": refers to the sound of running the refrigerator with your ears. For example, whether the motor is running, whether there is noise when the compressor is working, whether there is airflow in the evaporator, whether the starter and the thermal protection relay have abnormal noise. If there are the following sounds, it is abnormal:
“嗒嗒嗒†is the impact sound of the metal inside the compressor, indicating that the internal moving parts collide due to looseness. "Dangdang" is the impact sound of the inner suspension of the compressor when it is broken and unhooked. If the sound of the airflow in the evaporator is not heard, the refrigeration system is clogged.
3. “Qâ€: It refers to the user to inquire carefully about the transportation, use environment and various conditions in the use of the refrigerator and record in detail, in order to analyze the fault.
Founded in 2005, Dongguan Yinyin Hardware Products Co., Ltd. specializes in: silver contacts, electrical contacts, double composite silver nails, riveted silver contacts, soldered silver contacts, various precision stampings, conductive copper posts, contacts Screws, electrical screws, DC, AC pins, copper sleeves, such as hollow needles, semi-hollow needles, four guides, rivets, silver dots, binding posts, AV copper sleeves, 3F07 copper sleeves, 3F05 copper sleeves, 215 copper sleeves Etc., and the production of various silver, copper, iron, aluminum, non-show steel and other heterosexual products, electricity, mobile phone 13728192869, Mr. Chen
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Forged carbon steel socket pipe is the most widely used connection accessories for high-pressure pipelines. It is formed by die forging blanks of round steel or steel ingots, and then machined to form by lathe. The series connection forms of socket pipe fittings include: socket welding connection ( SW), butt welding connection (BW), threaded connection (TR), and socket fittings are classified into: 45° elbow, 90° elbow, tee, cross, union, pipe clamp, plug
The pressure rating of socket and socket fittings is generally divided into 3000LB (SCH80), 6000LB (SCH160) and 9000 (XXS) in the form of socket welding and butt welding connection. The pressure grades of pipe fittings in the form of threaded connections are divided into 2000LB, 3000LB and 6000LB.
Socket fittings are generally divided into: carbon steel, stainless steel, alloy steel,
Carbon steel material: Q235, 20#, A105, etc.;
Stainless steel material: 304, 304L, 316, 316L, 321, 00Cr17Ni14Mo2, etc.;
Socket fittings are mainly used in petrochemical, medical and health, electric power, aerospace, military, fire protection, metallurgy, shipbuilding, gas, nuclear power, and environmental protection and other departments and fields that require high pressure and precise dimensions.
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