天堂www中文在线资源_中文字幕精品无码一区二区_午夜福利理论片在线观看_99精品国产兔费观看久久99_免费毛儿一区二区十八岁

Inspection method of capacitance:

1, appearance check: two kinds of compressor capacitance dry type and oil immersion type, dry type capacitor mostly use plastic shell package, oil immersed capacitor is encapsulated with metal shell. Therefore, if the shell deformation, bulge, cracking, leakage and so on show that the capacitance has been damaged and can not be used again; the change of capacitance is as much as possible the original specification model, can not follow It is replaced by meaning.

2, capacity check: the capacity of capacitor will be attenuated by the use of bad environment and the prolongation of time. When the general attenuation is greater than 20%, the phenomenon of starting difficulty, starting current is large, and the start time is long, especially when the power supply voltage is below 20%, starting jump stop, overcurrent protection and even burning compressor will appear. Therefore, when there is a difficulty in starting, starting time is too long, instant jump and other phenomena, first of all, check the capacitor.

Measurement method:

A, measure the measurement with digital multimeter, capacitor or special capacitor.

B, with the pointer type multimeter resistance gear rough measurement of charge and discharge time: red and black surface brush contact capacitor respectively, the needle rapidly rise and slow quickly back to the good capacitance, the needle does not rise or rise back in situ, indicating that the capacitor is bad.

C, new and old capacitance comparison start test.

Recommendations for the selection of capacitors:

1, try to purchase capacitance in the regular air conditioning and accessories shop

We find that the small shops in the market never pay attention to the quality of the products, only the lowest price, the capacity of the purchase is the same, and the size of the air-conditioning accessories will pay attention to quality.

2, try to choose the capacitor with brand.

Many capacitors on the market are produced by small workshops, and have no brands. The quality is even more guaranteed, which can not reach the capacity at all. We recommend that users choose brand names, such as Panasonic and Lexue.

3, the price is obviously lower than the market price.

The profit margin of capacitance is not large, and the price difference will not be too large. If the price is very low, it is recommended that users choose carefully.