Network ion fan manufacturers to solve the basic knowledge of static electricity

Network ion fan manufacturers to solve the basic knowledge of static electricity?

There are two causes of static electricity in everyday life:

1. Special friction with each other (friction and electricity)

2. Separate close contact with the special (separation of electricity)

However, in fact, the simpler phenomenon can cause static electricity.

Is the insulator normally charged and the metal is also charged?

It is generally believed that the metal (conductor) is not charged, but as shown in the figure below, the metal is in the state of the moon, and it is the same as the insulator, with the friction and separation of static electricity.

Earthing, through friction, separation, etc. will produce static electricity, but static electricity will immediately spread to the ground wire, and disappear.

Unground, through the friction, separation and other static electricity due to no way to go, and can not disappear (charged)

What are the properties of static electricity?

Static electricity is also a kind of electricity, including positive and negative static electricity, positive and negative static electricity has the following properties:

Positive electrostatic: its electrical direction is shown as deviating from the charged body

Negative static electricity: its electrical direction is shown as pointing to the charged body

In addition, when the material is close to each other, the same polarity of the material with different polar substances close to each other to attract each other.

At this time, the force is called "Coulomb force" (unit: N), the relationship between charge and Coulomb force is expressed by "Coulomb's Law".

On the charged sequence

The charged sequence is arranged in terms of the degree of positive or negative charge of the material of the various substances, and is used to determine what kind of electrical charge in the electrical contact,

The larger the permutation, the greater the amount of charge, (the same material in the charged sequence does not come into contact, but compared to the different materials in the charged sequence,

Charging is small. )

Example

1. Glass and cotton friction

   Glass: positively charged

Cotton: with a negative charge

Cotton and teflon friction

Cotton: with positive electricity

Teflon: with a negative charge

What is the separation of electricity?

When the contact with each other, such as tearing the tape will produce a strong charge phenomenon, although this phenomenon is the same as Figure 7, "contact with electricity" the same, however, due to red off (separation) to make special Body electricity, generally "separation of electricity" to produce separation of electricity, the closer contact, the greater the static electricity generated, in addition, the amount of charge depends on the separation rate. The separation rate is slow, it will continue to produce small-scale electrostatic discharge, the charge is relatively small, and the separation speed, then reduce the electrostatic discharge, the charge is relatively large.

What is the difference between friction and electricity?

Since the static electricity is generated at the moment of the contact of the special body, the electric power generated by the friction is also a kind of electric contact, but when the friction is charged (the friction is energized), the contact surface is increased due to the friction between the contact surfaces Friction increases the temperature of the special surface, so the resulting static electricity is much larger than the contact life.

How can the human body feel the static electricity?

The human body can feel the static electricity in general at + 3000V (+ 3KV). The following table shows the relationship between the degree of human shock and the voltage.

From the Japan Industrial Safety Research Institute issued (electrostatic safety guidance)