We simply describe the clustered tubular elements used in the new energy vehicle PTC heater. As a professional PTC heater, new energy vehicle PTC heater manufacturer, we will try our best to organize and publish various related knowledge and serve you wholeheartedly.
PTC component selection The characteristics and quality of PTC components are the key factors that directly determine the performance of PTC heater products. The current PTC heating elements used in thermostatic heater products such as heaters are all high-temperature PTC elements, and the Curie temperature is higher than 120°C. Compared with low-temperature PTC elements, there are big differences in manufacturing process and performance parameters. Good PTC characteristics are the basis for obtaining good heating performance.
The main parameters considered when selecting PTC components:
(1) Room temperature resistance R25: for 110~220V voltage, R25 is generally 100Ω~10KΩ, when used for 6~24V, R25 is 0.5~5Ω. Under normal circumstances, R25 is small, the initial current is large, the heating is fast, and the power is also large. But the withstand voltage capability is poor.
(2) Curie temperature TC should be moderate: under certain conditions, increasing TC can increase the power consumption of the heater, but TC is too high (greater than 260 ℃), so that the PTC element electrode is prone to aging, significantly shortened the life, and often Accompanied by thermal breakdown. So generally choose PTC heating element with Curie temperature below 260℃.
(3) The withstand voltage should be high: at least two times the working voltage should be guaranteed to prevent electrical breakdown.
(4) The temperature coefficient of resistance should be large: generally greater than 14 to ensure that it is less affected by environmental temperature changes.
(5) The initial impulse current should be moderate: Generally, the impulse current should be less than twice the value of the stable working current.
Small size and high power: the heater should use clustered tubular electric heating elements. The heat response is fast, the temperature control precision is high, and the comprehensive thermal efficiency is high. High heating temperature: heater design-high task temperature can reach 850℃. The medium outlet temperature is average, and the temperature control accuracy is high. Wide range of use and strong compliance: The heater can be used in explosion-proof or popular places. The explosion-proof grades can reach dⅡB and C grades, and the pressure resistance can reach 20MPa. Long life and high reliability: The heater is made of extraordinary electric heating materials, designed to have a low power load on the surface, and adopts multiple maintenance, which greatly increases the safety and life of the electric heater. Fully automatic control: The heater circuit is designed according to the requirements, which can facilitate the completion of active control of parameters such as outlet temperature, flow, and pressure, and can be networked with computers. The energy-saving results are obvious, and almost 100-% of the heat generated by the electric energy is transferred to the heating medium.