The Quality Of The Heating Element Is Determined By 7 Major Aspects
The quality of heating elements is affected by many factors, which are determined by power accuracy, electrical strength, insulation, leakage current, service life, corrosion resistance, appearance and size.
1. Power accuracy: It is mainly related to the quality of resistance wire and the technological level of the manufacturer. Generally, a temperature coefficient test is required before mass production to determine the qualification
The cold resistance of the power range.
2. Gas strength: The factors that affect the electrical strength of the heating element mainly include the thickness of the insulating layer, the quality of the raw material of the insulating layer, the length of the heating element, the radius of the bend and the bending
The number of R parts. At present, the cold state withstand voltage of the heating element is generally required to reach a breakdown current of 0.5mA at 2000V/1s.
3. Insulation: The main influence on the insulation of the heating element is the sealing process of the heating element. Generally, the high temperature powder must reach at least 104M0 after sealing, the medium temperature magnesium powder and the medium and low temperature magnesium powder or
The modified powder should reach 103 M2.
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4. Leakage current: It is mainly related to the heating length of the heating tube and the quality of the magnesium powder and the heating length of the heating tube when the heating tube is used. This is also for high-temperature electric heating
An important assessment index of the management.
5. Service life: In addition to the quality of the resistance wire, the life of the heating element is also related to the quality of magnesium oxide (and the choice of tube material), the selection of the diameter of the resistance wire, etc.
The factor is related. For air-dry heating tube manufacturing, the surface load is controlled within 8W/cm2. When selecting the diameter of the resistance wire, it is necessary to calculate the surface load of the resistance wire to reach the life.
Claim.
6. Corrosion resistance: It is a problem often encountered in water heating heating elements and air-dry heating heating elements. In addition to the reasonable choice of (tube) material, it is also related to the heat treatment of the heating element.
The surface condition of the heating element is related.
7. Appearance size: It meets the customer's assembly requirements and reflects the quality of the factory's technology, manufacturing, and tooling guarantee capabilities. At the same time, the appearance can also reflect the grade and manufacturing of the product
Level.
It can be seen from the above that the life of the heating element has many aspects, so we will conduct a test before shipment to ensure the product quality and life expectancy.
