Appliance Design - April 2009 - (Page 19) COOLING TECHNOLOGIES Cooling Capacity in Watts Pressure Ratio (dimensionless) Volumetric Efficiency Percentage Pressure Ratio (dimensionless) Fig. 2. Mini-compressor cooling capacity compared to pressure ratio at 6,000 RPM. Fig. 3. Mini-compressor volumetric efficiency compared to pressure ratio at 6,000 RPM. a displacement of 1.4 cc, and is powered by a high-torque brushless DC motor. The design was intended to be very small, lightweight, and relatively high in cooling power. The DC motor is controlled with a sensorless drive, and is easily adapted to variable-speed operation up to 7,000 RPM for efficient performance. It also provides rapid cool-down and precise control of temperature. Although no acoustic noise data is available as yet, several users have agreed that the sound level it generates is quite reasonable and acceptable in many products. Table 1 provides a summary of specifications for the compressor. An independent evaluation of the compressor was performed at Purdue University, which included measure- Customers everywhere depend on our igniters. No matter where you are, from the North Pole to the South Seas, Saint-Gobain has an igniter to meet your needs. Our igniters deliver dependable performance in gas appliances of every description, from furnaces and boilers to ranges, cooktops, and dryers. Made with a state-of-the-art ceramic, our igniters offer physical and thermal strength, electrical stability, easy handling, and simple installation. They are available in virtually every voltage, including 12V, 24V, 120V, and 240V. Slotless MINI-IGNITER™ CRYSTAR® Igniter For more information about Saint-Gobain Igniter Products – makers of the original Norton Igniter – call us at 603-673-2681 or visit us at www.igniterproducts.saint-gobain.com. After all, when it comes to reliability, our igniters beat the others cold. AD12074StGobain.indd 1 www.applianceDESIGN.com applianceDESIGN 11/16/07 2009 AM April 9:17:17 19 http://www.nortonigniters.saint-gobain.com/ http://www.nortonigniters.saint-gobain.com/ http://www.appliancedesign.com
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