Appliance Design - July 2008 - (Page 19)

HEatING ElEmENtS A downside of a wire-element based system is that it can interfere with light transmission and the ability to read the display. Heating glass with a wire system has a transparency of around 80 percent, while metal oxide systems can be 90 percent or more transparent. The wires can obscure the display, especially in LCD units with small pixels, unless they are very accurately positioned. The other approach, using metal oxide conductors as a film or coating, typically makes for better visibility. Light transmission rates stay pretty constant, even when higher temperatures are required, says Usinowicz. He says it isn’t the amount of coating that affect heat generation, but the formulation of the coating. The conductive material used can vary in terms of the type of metal oxide used, as well as the construction of the glass component. The two most prevalent transparent conductive oxides used in thin-film coatings are fluorine-doped tin oxide, and Indium tin oxide. Tin oxide is robust and suited for a variety of uses, indium tin oxide is a good material to SGG thermovit Elegance, Charme model has screen-printed pattern. use especially in the electronic display industry, but is more costly. The metal oxides on the glass can be vapor deposited, also called sputtering, spray coated, or infused within the glass itself. Sputtering is a process in which the coating material is bombarded with negative ions under high-voltage accelerations. The material ejects atoms and molecules from the target material, which are propelled against the glass substrate where they bond. Infusing the glass is done with a pyrolitic deposition, a process used by companies such as Anthony International and EGP. Pyrolytic Cost-Effective Control for OEM Applications Temp Flow Pressure LLC New EMC New EMC Multi-Loop Multi-Loop PID Controller PID Controller Heat Cool Alarm Voltage Level Current The NR Family � Four Independent or Combined Loops of Auto-Tune Control for: PID, On/Off, Cascade, and Feed Forward Small 4.5˝ x 7˝ Size for Subpanel Mounting Communication and Custom Display Options Less Cost than Four Separate Controllers with Similar Capabilities � � � Reduced internal oxidation, increased structural integrity. Draws less current, lights gas at a lower temperature. Easy install. Completely interchangeable with 4100 series valve. Freedom from early igniter aging Contact us today for special pricing: Athena Controls, Inc. For more information contact mktg@athenacontrols.com info@surfaceigniter.com www.surfaceigniter.com SPECIAL INTRODUCTION ON PAGE 25 applianceDESIGN July 2008 19 800-321-4147 www.applianceDESIGN.com http://www.surfaceigniter.com http://www.surfaceigniter.com http://www.appliancedesign.com

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Appliance Design - July 2008 Contents Editorial Shipments/Forecasts News Watch Heating Elements Gas Technology Motors & Pumps Controls & Sensors Design Marts Association Report: AHAM Advertiser's Index

Appliance Design - July 2008

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