How to solve the rated power deviation of electric heating tubes

How to solve the rated power deviation of electric heating tubes

How to solve the rated power deviation of electric heating tubes? Is there a good way? This is a problem that we often encounter. During the production process, the length of the alloy wire in the electric heating tube can affect the resistance of the alloy wire, thereby affecting the power of the electric heating tube. There is a power error in the electric heating tube, but the power of the electric heating tube is according to the "JB/T 2379-93 Industrial Electric Heating Tube Standard", and the deviation range of the rated power is as follows:

Now let me give you a solution, which basically consists of these two types. Under sufficient heating conditions, the deviation of the rated power of the electric heating tube should not exceed the following specified range:

1. If it is an electric heating tube with a rated power of less than or equal to 100W: ± 10%;

2. If it is an electric heating tube with a rated power greater than 100W:+5%~-10% or 10W, whichever is greater. There are many types of electric heating elements in general, and currently there are four common types of electric heating elements: electric heating wire, PTC electric heating element, conductive coating, and electric heating film. As the earliest traditional electric heating element, electric heating wire is still widely used in industrial and civil fields due to its advantages of high heating temperature and heat resistance temperature.

Pay attention to some issues when using, and be careful when choosing and using. The advantage of stainless steel electric heating elements is that there is no open flame during heating, and the heating efficiency can reach 70%. However, their seismic performance is poor, and they cannot be cut and used arbitrarily. Moreover, due to the limitation of Curie temperature, they cannot be used for heating above 350 ° C. The advantages of using conductive coatings as electric heating elements are surface heating, large heat dissipation area, and good seismic performance. However, the disadvantage is that the heating layer is easily detached and can only be used below 200 ° C. Electric heating tube is an emerging type of electric heating element, which has the advantages of no open flame heating, low thermal resistance, surface heating, fast heat conduction, long service life, easy cutting and separation use, high electric heating efficiency of up to 90%, and small heat loss. However, its disadvantages are slow heating and low heating temperature. At present, many domestic manufacturers have developed and designed products such as PI electric heating film and PET electric heating film, which are widely used in personal care small appliances such as curlers, hair straighteners, electric shoes, massagers, electric gloves, electric clothing, massage chairs, instruments and pet heating pads, mobile phones, circuit boards, and other low-temperature heating products.

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