There are many people always put the PTC thermistor and the PTC heater “silly distinct”, today Xiaobian will introduce you to the difference between PTC thermistor and PTC heater, unpacking PTC thermistor and PTC The mysterious veil of the heater. I believe that this article will be able to distinguish the difference between PTC thermistors and PTC heaters!
There are many people always put the PTC thermistor and the PTC heaters “silly distinct”, today Xiaobian will come to you to introduce the PTC thermistor and PTC heater difference, unpacking PTC thermal sensitive Electrical resistance with the mysterious veil of the PTC heater. I believe that this article will be able to distinguish the difference between PTC thermistors and PTC heaters!
First we have to understand the PTC thermistor and the PTC heater Basic working principle:
1. Principle of PTC thermistor work:
PTC thermistor (positive temperature coefficient thermistor Recovery fuses) is a semiconductor resistor for temperature sensitivity. Once the necessary temperature (Curie temperature), its resistance value follows the increase in temperature, which is almost the increase of the presence. The change in the temperature of the PTC thermistor body can be obtained from the current flowing through the PTC thermistor, or it can be obtained from an external input heat or the superposition of the two.
2. PTC heater work principle:
PTC heater adopts a PTCR thermal ceramic element, from several monolithic combination with ripples The heat dissipation aluminum strip is composed of high temperature glue, which has a small thermal resistance and a significant length of high heat exchange efficiency. Its maximum feature is that it is safe, that is, when the fan is blocked, the PTC heater does not decrease sharply, and the power will drop sharply, at which time the surface temperature of the heater is limited to around the temperature of the Curie (generally 220 ° C), which is not generated “red” phenomenon in the surface of the electric heater heater, excluding the hidden dangers of the episode.
II. PTC thermistor and PTC heaters apply precautions
1, PTC heating sheet has the characteristics of active constant temperature, no Require temperature control system, direct power of PTC heating sheets.
2, when the PTC heating sheet is used to heat the liquid (e.g., water), the Liquid is burnned, the PTC heating sheet is notdamage.
3, if the PTC heating sheet is used to heat the cool breeze, the PTC heating sheet will not be damaged when the wind is not air.
4, the job is reliable, the internal characteristics of the PTC heaters are maintained, and it will not exceed the temperature.
5, the work voltage is very wide: when the work voltage changes twice, the change in surface temperature is very small.
6, when a plurality of PTC heating sheets are used together, they should be connected in parallel.
7, different heat dissipation conditions make the heat transfer power of the PTC heating sheet difference.
8. The heat transfer power is large to small, and finally. The security power is related to the use of conditions, the same PTC heating device, the power is different, and the power may differ twice. The faster the heat dissipation, the larger the power is, the higher the surface temperature of the PTC, the higher the power.
9, the surface temperature of the PTC heating member is controlled by PTC itself, or can be manipulated by the disconnection circuit, but not in the conditioning voltage to manipulate the surface temperature.
10, the PTC itself is high, the life is very long, but if the installation is improper, the product will appear and temperature is not stable.
Today, the introduction to PTC thermistors and PTC heaters is here! Is it more about the PTC thermistor and the PTC heater? Select the appropriate PTC thermistor with the PTC heater in different situations! To know more about the PTC thermistor with the PTC heater, please pay attention to us!
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Original article，author：zongmuLi，If reprinted，Please indicate the source：http://madedesign.net/index.php/2021/01/10/ptc-thermistor-and-ptc-heater-silly-distinct/