Abstract: A water temperature calibration method for an electric kettle includes the steps of providing a temperature sensor, a microprocessor, and a control circuit; detecting an interior temperature from one of the temperatures of the water, a heating point contacting with the water, and an interior wall of the electric kettle; determining a temperature rate change by the microprocessor and comparing a current cycle of the temperature rate change with a previous cycle thereof; and sending out a control signal to the control circuit when the current cycle of the temperature rate change is close to the previous cycle thereof that a difference between the current cycle of the temperature rate change and the previous cycle thereof is minimized. Therefore, the process is adapted to accurately determine the water temperature and to cut off the heating power when the water is boiled.

Abstract: A method of controlling an electric kettle for “dry” burn prevention during heating process, including the steps of: providing a temperature sensor, a microprocessor, and a control circuit; detecting the water temperature; determining the temperature rate change and comparing the temperature rate change with the rate change threshold; and when the temperature rate change is larger than the preset rate change threshold, sending a control signal to the control circuit. The microprocessor determines the temperature rate change and the acceleration rate change that when the temperature rate change and acceleration rate change are larger than the corresponding thresholds respectively, the microprocessor sends the control signal to the control circuit to stop the heating process. Therefore, the present invention accurately determines the increasing temperature of the water and simultaneously cuts off the heating power to prevent the electric kettle from being burnt.

Abstract: A process of controlling an operation of an electric kettle includes the steps of initializing a microprocessor to detect a water temperature via a temperature sensor to set a system parameter; checking a status of a control circuit; determining a preserve temperature of the water; verifying the temperature sensor to protect the temperature sensor from being burnt; determining a condition of the water whether the water is needed to be heated up or preserved; and sending out a control signal to the control circuit in responsive to the condition of the water to heat up the water or maintain the water at the preserve temperature. Therefore, the present invention is adapted to accurately control the whole process of the electric kettle.

Abstract: A method of controlling an electric kettle for “dry” burn prevention during heating process, including the steps of: providing a temperature sensor, a microprocessor, and a control circuit; detecting the water temperature; determining the temperature rate change and comparing the temperature rate change with the rate change threshold; and when the temperature rate change is larger than the preset rate change threshold, sending a control signal to the control circuit. The microprocessor determines the temperature rate change and the acceleration rate change that when the temperature rate change and acceleration rate change are larger than the corresponding thresholds respectively, the microprocessor sends the control signal to the control circuit to stop the heating process. Therefore, the present invention accurately determines the increasing temperature of the water and simultaneously cuts off the heating power to prevent the electric kettle from being burnt.

Abstract: A process of controlling an operation of an electric kettle includes the steps of initializing a microprocessor to detect a water temperature via a temperature sensor to set a system parameter; checking a status of a control circuit; determining a preserve temperature of the water; verifying the temperature sensor to protect the temperature sensor from being burnt; determining a condition of the water whether the water is needed to be heated up or preserved; and sending out a control signal to the control circuit in responsive to the condition of the water to heat up the water or maintain the water at the preserve temperature. Therefore, the present invention is adapted to accurately control the whole process of the electric kettle.

Abstract: A water temperature calibration method for an electric kettle includes the steps of providing a temperature sensor, a microprocessor, and a control circuit; detecting an interior temperature from one of the temperatures of the water, a heating point contacting with the water, and an interior wall of the electric kettle; determining a temperature rate change by the microprocessor and comparing a current cycle of the temperature rate change with a previous cycle thereof; and sending out a control signal to the control circuit when the current cycle of the temperature rate change is close to the previous cycle thereof that a difference between the current cycle of the temperature rate change and the previous cycle thereof is minimized. Therefore, the process is adapted to accurately determine the water temperature and to cut off the heating power when the water is boiled.