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13.02.2015 admin
Use these free images for your websites, art projects, reports, and Powerpoint presentations! Electric pressure cookers have evolved substantially since the first patent was filed on January 9th, 1991.  Based on the cooking control capability, we can classify electric pressure cookers into three generations. The 1st Generation electric pressure cookers already have the essential pressure and temperature sensors.
Basic safety mechanisms, such as locking the lid under pressure and excess pressure protection, have been implemented in the 1st Generation cookers. The 2nd Generation electric pressure cooker builds on top of the capability of the 1st generation with a digital controller.

Many of the electric pressure cookers sold in the North America today are still 2nd generation.
With the advance in pressure and temperature sensor accuracy, the 3rd Generation electric pressure cookers implement sophisticate control with digital technology. You can use these free cliparts for your documents, web sites, art projects or presentations.Don't forget to link to this page for attribution! Both sensors act as a threshold moderator.  When either the threshold of pressure or that of temperature is reached, the power to the heating element is cut. Two most remarkable features are Smart Programming and Enhanced Safety. These features greatly improve cooking result, maintain consistence and enhance safety.

For instance, one common mistake is misplacing the stream release at the open position while starting cooking.
Earlier generation cookers would continue heating.  If the situation is not corrected on time, all liquid in the cooking pot would evaporate and the food would be spoiled. The 3rd Generation cooker implements a mechanism called, Leaky Lid Protection, where the microprocessor detects the excess long pre-heating period and stops the heating with an alarm.

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