| 词条 | Ceramic heater |
| 释义 |
}} A ceramic heater as a consumer product is a space heater that generates heat using a heating element of PTC (Positive Temperature Coeffient) ceramic.[1] Ceramic heaters are usually portable and typically used for heating a room or small office, and are of similar utility to metal-element fan heaters. How ceramic heaters workPTC ceramic material is semi-conductive and when voltage is applied to it, the power decreases quickly as it reaches a certain temperature according to the particular composition of the ceramic. This means its temperature is self-regulating. The ceramic elements are in contact with aluminium fins, thereby heating the fins up. A fan blowing across the fins heats the air. Differences from other electric heatersElectric heating elements made of resistance wire also have a positive temperature coefficient of resistivity, but do not increase their resistance enough to be self-regulating; they are typically used with the wires red-hot. The ceramic, on the other hand, increases its resistance sharply at the Curie temperatures of the crystalline components, typically 120 degrees Celsius, and remains below 200 degrees Celsius, providing a significant safety advantage.[2] References1. ^{{cite web|url=http://www.cbsnews.com/stories/2005/02/09/earlyshow/contributors/dannylipford/main672592.shtml|title=A Guide To Space Heaters|first=Brian|last=Dakss|date=9 February 2005|work=CBSNews.com|accessdate=15 January 2011}} {{HVAC}}{{Use dmy dates|date=September 2011}}2. ^US patent 4703153 1 : Heaters |
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