Ultrasonic-control electric rice cooker

Abstract

The invention relates to an ultrasonic-control electric rice cooker, belonging to the technical field of household electric appliances. In order to overcome the defect that the working mode of the electric rice cooker in the prior art must depend on measuring the change of the temperature of an inner pot in a mechanical contact way and monitoring the change of vocal prints of the inner pot to obtain temperature change as a control basis, the ultrasonic-control electric rice cooker takes the following measures that an ultrasonic generator and an ultrasonic receiver are installed on the electric rice cooker, and the ultrasonic receiver is connected with a vocal print recognition circuit. Physical information such as the internal temperature and the water condition of the inner pot of the electric rice cooker is obtained by actively transmitting ultrasonic waves towards the inner pot of the electric rice cooker and by adopting an active method of analyzing ultrasonic vocal print electric signals received by the ultrasonic receiver. The benefits of taking the measures are that the ultrasonic waves at the most sensitive frequency band can be selected according to the characteristics of the inner pot of the electric rice cooker, more, clearer, more accurate and more reliable physical information such as the internal temperature and the water change of the inner pot of the electric rice cooker can be obtained, and a reliable basis is provided for a control circuit.

Description

technical field [0001] The proposal belongs to a technical field of electric rice cookers among household appliances. Background technique [0002] In the electric rice cooker of prior art, no matter adopt the common electric rice cooker of mechanical temperature limiter or more high-grade, adopt the intelligence of thermistor temperature limiter to be rice cooker. They all have one thing in common, that is, the temperature change in the inner pot is used as the control basis of the control circuit. Technically, this type of rice cooker has obvious defects, that is, the temperature measuring point is not a heating zone, and the temperature at this point obviously lags behind the temperature of the heating zone, which cannot reflect the real situation of the inner pot. During the cooking process, the water in the inner pot is heated to boil. After boiling for a period of time, part of the water in the rice cooker is absorbed by the rice, and the other part is turned into st...

AI Technical Summary

Problems solved by technology

Although there is a relatively advanced voiceprint recognition control technology in the existing electric rice insurance technology, it still has certain shortcomings because it is a control technology for passively obtaining information like the mechanical control method, such as its sensitivity. room for improvement, etc.