Fuzzy control heating device for automatic soybean milk machine

Abstract

The present invention discloses a fuzzy control heating device of a completely automatic soymilk machine. The control device comprises a single chip which is powered by a transformer-free step-down rectification power supply circuit and a heating control unit which is connected with the single chip; wherein, the heating control unit comprises a first thyristor tandem drive circuit and a heating component; the first thyristor tandem drive circuit comprises two main control thyristors which are connected with the heating component in series in an alternating current power supply loop and an I / O port with a control electrode connected with the single chip; and two main electrodes are respectively connected with the precursory thyristors of the control electrodes of the two main control thyristors. The present invention not only realizes the stepless regulation and control of the heating power with the thyristor tandem drive circuit, but also provides the double-stage protection for the heating component simultaneously and has higher security and reliability.

Description

technical field [0001] The invention relates to a fuzzy control heating device for a full-automatic soybean milk machine. Background technique [0002] In the heating control circuit of the traditional automatic soybean milk machine, because the relay is used to control the heating, the heating power can only be at full power or half power, and the power will generally be too high during the boiling stage of the pulp, resulting in overflow. At this time, the heating can only be stopped and wait for the liquid. After the surface falls back, it will be reheated, and then it will overflow again and stop heating, and so on. This makes the soya-bean milk actually in a state of alternate boiling and non-boiling, and cannot realize the effect of fully decomposing protein by slow fire continuous boiling. [0003] Moreover, if the power of the heating tube is too large, the pulping will easily cause the paste tube to burn, which is harmful to the human body and is not easy to clean....

AI Technical Summary

Problems solved by technology

However, in the existing automatic soybean milk machine control circuit, a rectifier circuit composed of a power transformer and a full-wave bridge rectifier is often used to supply power to the single-chip microcomputer, and then the single-chip microcomputer drives a single thyristor through the intermediate trigger circuit. , not only the circuit structure is more complicated, but the manufacturing cost is relatively high, and because only one thyristor is used as the main control, once the thyristor is out of control or broken down, it will cause the heating element to heat continuously, causing safety hazards and greatly reducing The work reliability and safety of the heating control circuit of this kind of automatic soybean milk machine

Images