How to prevent these security accidents from happening? In addition to manufacturers to improve product quality, the relevant government departments to strengthen supervision, consumers in the purchase and use of washing machines to understand some of the common sense of security can effectively prevent the occurrence of security incidents.
â— washing machine purchase safety instructions
1. Protection against touching live parts
The structure of the washing machine should be such that the user should not touch the exposed live parts. The opening of the washing machine should also not allow the finger to reach the internal wiring.
This regulation relates to the product's tightness and circuit planning. A qualified electrical product must not only have a scientific circuit design, but should also have professional wiring specifications and insulation measures. In this way, the operating area and work area of ​​the electrical product are isolated and personal safety is protected.
2. Leakage current at operating temperature
At operating temperatures, leakage currents between live parts on the inside of the washing machine should not exceed 3.5 mA.
The safe voltage that the human body can endure is safe voltage is 36V, safe current is 10 milliamps, and can cause people to feel the electric current is 1 milliamperes. Therefore, the national regulation of 3.5 mA is within the scope of safety, but it is also within the scope of human perception. If there is a sense of electric shock, find the cause of the leakage as soon as possible to protect their own safety.
3, input power
The actual input power of the washing machine should not exceed 15% of its rated power at rated voltage and normal temperature.
The output power of the washing machine directly affects the power consumption. Therefore, almost all the washing machines at present have been added with the frequency conversion function, which effectively improves the utilization rate, allocates the motor frequency on demand, and saves energy.
4, temperature rise
When the washing machine is working normally, the temperature rise of its motor winding should not exceed 75 degrees, and the temperature rise of the housing should not exceed 60 degrees.
The motor rotates under electromagnetic drive. In the motor work, the temperature generated by the motor mainly comes from two points, one is friction heat, the other is that the coil current generates heat. If the temperature is too high, it will affect the life of the motor and even affect the normal use of electrical products.
5, stability
The washing machine should have sufficient stability. In any position during use, it should be placed on an inclined plane that is 10 degrees from the horizontal plane. The washing machine should not be turned over.
6, automatic power off
In the dehydration operation of the washing machine, when the user opens the upper cover by 50 mm, the dehydration motor should be powered off.
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