Component selection and design points for the PTC Heating Fan

The PTC thermistor appeared in 1950, followed by the PTC thermistor with barium titanate as the main material in 1954. The PTC thermistor can be used in industry for temperature measurement and control, also for temperature detection and regulation of a part of the car, and is also used in a large number of civil equipment, such as controlling the water temperature of instantaneous water boilers, PTC Heating Fan and the temperature of cold storage, using its Heating for gas analysis and wind speed machine, etc. Next, we take a look at the selection of components and design points of the PTC Heating Fan. Here are some answers.

Here is the content list:

l The selection of components for the PTC Heating Fan.

l What are the design points of the PTC Heating Fan?

The selection of components for the PTC Heating Fan.

The characteristics and quality of PTC components are key factors that directly determine the performance of PTC heating products. Currently used in PTC Heating Fan and other thermostatic heater products in the PTC heating element are high-temperature PTC components, Curie temperature higher than 120 ℃, compared with low-temperature PTC components, in the manufacturing process, performance parameters have a large difference. Good PTC characteristics are the basis for obtaining good heating performance. The main parameters to consider when selecting PTC components: first, room temperature resistance R25: for 110 ~ 220V voltage, R25 generally takes 100Ω ~ 10KΩ, for 6 ~ 24V, R25 takes 0.5 ~ 5Ω. In general, R25 is small, the starting current is heating faster, and the power is also larger. But the ability to withstand voltage is poor. Secondly, the Curie temperature TC should be moderate: under certain conditions, improving the TC can correspondingly improve the power consumption of the heater, but if the TC is too high (greater than 260 ℃), the electrode of the PTC element is easy to aging, life is significantly shortened, and often accompanied by the thermal breakdown. So generally choose 260 ℃ below the Curie temperature of the PTC heating element. Third, the voltage resistance should be high: at least two times the use of voltage, to prevent electrical breakdown. Fourth, the resistance temperature coefficient should be large: generally greater than 14, to ensure less affected by changes in ambient temperature. Fifth, the starting inrush current should be moderate: the general requirement is that the inrush current should be less than twice the value of the stable working current. Sixth, the shape should be flat and the thickness tolerance should be within ±0.02mm.

What are the design points of the PTC Heating Fan?

All heaters are forced convection heating devices. An important design issue is how to take the heat generated by the PTC in time, which depends on the design of the PTC Heating Fan and the air duct. The air sources used are axial fans, cold fan fans, drum fans, centrifugal fans, etc. The basic requirements are: so that the role of the entire PTC heater to the windward side of the wind speed is uniform, otherwise, the efficiency of the heater will be greatly affected, and PTC components cannot give full play to their respective capabilities; wind speed to be reasonable, PTC heater power consumption and export air temperature in wind speed is closely related to the increase in wind speed, power increases, wind temperature decreases. In addition, there must be a good air duct design with it.

For more information about PTC Heating Fan, please contact us. With many years of accumulated experience in R&D and production, we can provide you with more product services and technical support! Our official website is https://www.helenbo.com/. Our company adheres to the corporate culture of "quality-oriented, customer-first" and always strives to be a professional PTC Heating Fan supplier in the industry.