Temperature and door induction circuit for microwave oven

Abstract

This invention discloses a microwave oven temperature and door inducing circuit, switch of the door is on and off along with the open / close state of the oven door, switch 1 and 2 are serial between power 1 and 2, switch1 is conducted by conducting linkage of the door SWII and 2 is conducted by door SWII close linkage, a cooling fan connected between switch 1 and 2 by the TH detects the temperature of controlling the fan operation, one port PO1 of the microcontroller is connected between 1,2 to induce the door open / close state by SWII and to induce the temperature by the TH, the microcontroller induces the working temperature of the fan and open / close state of the door by the voltage level induced by POl, reducing port numbers.

Description

technical field [0001] The present invention relates to a microwave oven, and furthermore, it is a temperature and door sensing circuit of a microwave oven that can sense the opening and closing of the door and the temperature through a port of a microcontroller. Background technique [0002] Microcontrollers are the control elements of many electronic products. Determine its scope of application based on the microcontroller's capacity and price, especially the number of ports. In other words, the more ports, the more expensive the price. This kind of microcontroller is widely used in signal sensing and control parts of home appliances such as microwave ovens. [0003] figure 1 The temperature and door sensing circuit diagram of the prior art microwave oven is given. That is, two ports are utilized in prior art microwave ovens to sense temperature and door opening / closing. [0004] As shown in the figure, in order to sense the temperature, one port P01 of the microcontr...

AI Technical Summary

Problems solved by technology

For two functions, two ports of the microcontroller are required, at this point increasing the usage capacity and cost of the microcontroller

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