Comparison between PTC heater and traditional electric heating tube
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1. Security
When the fan malfunctions and stops or gets stuck, the surface temperature of the heater should be maintained at a limited safe temperature of around 230 ℃, so as not to cause surface redness and eliminate the risk of accidents.
2. Energy saving
When the ambient temperature rises, the self resistance gradually increases, and the power gradually decreases. After the ambient temperature stabilizes, the power stops changing, thus achieving the effect of energy conservation.
3. High heat conversion rate
It has a long lifespan and is minimally affected by external voltage. The PTC heater is superior to traditional electric heating tubes in all aspects of performance through careful design.
PTC principle: PTC electric heater is an automatic temperature control and energy-saving heater. It is composed of PTC thermosensitive ceramic components as the heat source, aluminum alloy corrugated plates as the heat sink, and is bonded and welded.
Uniformly distribute high-temperature resistance wires inside high-temperature resistant stainless steel seamless pipes, and densely fill the gaps with crystalline magnesium oxide powder with good thermal conductivity and insulation performance. This structure is not only advanced and has high thermal efficiency, but also generates uniform heat. When there is current passing through the high-temperature resistance wire, the heat generated diffuses through the crystalline magnesium oxide powder to the surface of the metal pipe, and then transfers to the heated part or air to achieve the purpose of heating.
Advantages:
1. Heating temperature below 200 degrees Celsius
2. Low production cost. Under no circumstances will the body turn red and there is a protective isolation layer
3. Strong designability, fast production, and high degree of mechanization
4. There are no issues of burns to the human body or causing fires
5. Easy to design and control the control cabinet
shortcoming
1. High impulse current
2. The heating temperature is high and can reach around 600 degrees
3. The measurement of power requires high environmental requirements
4. High thermal inertia of temperature
5. The production cost is slightly higher than that of electric heating tubes
6. The degree of mechanization is not high, and the production is subject to certain limitations
protect
1. Restorable thermal protection at 60 ℃ (normally closed)
2. Unrecoverable thermal protection at 110 ℃ (normally closed)
3. Air switch+shunt release+auxiliary contacts
4. Wind pressure differential switch
