Industry information

Hair hotline, electric hotline products in the market is common, too many products can be for us to choose, so how do we choose the you want electric line?

 

In many types of hair hotline, how to choose the suitable electric line? Must first determine the electric hotline application environments, such as electric line length is probably how many? The power supply voltage is how many? Power requirements? With the three parameters, we can choose. Here are a few examples:

 

A,

 

Customers to design a heating pad, require 5 v input voltage, electric heating pad size of 35 * 35 cm. For calorific value at about 40 degrees. The electric heating pad to how to choose the electric line?

 

Analysis: in this case, we'll be the first to know power: according to the experience of selecting 40 degrees temperature, power for about 5 w per meter. 35 * 35 cm, the area of electric hot line length is about 2 meters. The electric heating pad power is 10 w.

 

Solution: the current of electric heating pad is = = 10 w / 5 v 2 a

 

Electric hotline total resistance = 5 v / 2 a = 2.5 Ω

 

The internal resistance of each meter = = 1.25 Ω 2.5/2 metres

 

So the design to electric hotline is 2 m, 1.25 per meter Ω. This resistance of electric hotline is usually with ordinary silica gel hair hotline! If use carbon fibre, its minimum resistance of 36 k line also has 10 Ω, obviously can not meet the requirements. So can only use ordinary silica gel hair hotline.
 

Two cases, =

 

There is a power supply is 220 v electric blanket, power is 120 w, 18 meters long. What to use on-line? Internal resistance is how much?

 

According to the above calculation method:

 

Current I = 120 w / 220 v = 0.55 A

 

The total resistance = 220 v / 0.55 A = 400 Ω

 

= 400/18 = 22.2 Ω per meter

 

So the electric hotline to select as 18 meters, internal resistance is 22.2 Ω 20 Ω integer. This kind of wire rod can choose ordinary silica gel hair hotline, also can choose carbon fiber hair hotline, can be determined according to the cost.

 

In the application of hair hotline, one thing to note, per meter hair hotline at the maximum power of more than 18 w. If a customer need about 900 w heating power, the power supply voltage is 220 v. 12 k carbon fiber hair hotline, resistance to 33 Ω. A total of 15 m hair hotline, divided into three parallel, every line is 5 m.

 

Dongguan hair hotline for all the above information, now for how to choose electric hotline you learned? For electric hotline, if you still have what not understand place or want to know more about this information, please contact us! We will give you according to the information you want know more perfect answer, sincerely welcome you to continue to focus on our column, we always look forward to hearing from you! http://www.dgdianrexian.com.