The housing unit contains a heating element, pressure and temperature sensors and a control box. The functional diagram of the housing unit is shown on the right.
The control box is the heart of the intelligence of the electric pressure cookers. It monitors the temperature and pressure of the inner pot with sensors. It is equipped with a microprocessor to control the timing, heating and complex cooking cycles. This is how a positive feed-back system is formed to achieve precise cooking conditions. If an unsafe operating condition is detected, it will sound an audible alarm or cut off the power supply to the heating element or both.
The control panel, being the user interface of the control box, allows one-key operation to activate pre-programmed cooking cycles for various dishes. For instance corn, peas, cauliflower and broccoli can be steamed in 1 minute. Frozen corn, peas, cauliflower and broccoli will been done in 2 minutes. Dry beans will take only 30~40 minutes.