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Temperature and door induction circuit for microwave oven

A technology of induction circuit and microwave oven, which is applied in the direction of microwave heating, etc., can solve the problems of increasing the use capacity and cost of microcontrollers, and achieve the effect of reducing production cost and the number of ports used

Inactive Publication Date: 2004-08-25
LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Temperature and door induction circuit for microwave oven
  • Temperature and door induction circuit for microwave oven
  • Temperature and door induction circuit for microwave oven

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The specific implementation mode is given below in conjunction with the accompanying drawings, and the microwave oven temperature and door sensing circuit of the present invention will be described in detail.

[0024] figure 2 Provide the temperature door sensing circuit diagram of the microwave oven of the present invention. image 3 The induced voltage distribution diagram of the present invention is given.

[0025] As shown in the figure, in the microwave oven of the present invention, a port of a microcontroller is used for sensing the operating temperature of the cooling fan and for sensing the opening and closing of the door.

[0026] That is to say, the gate switch SW11 is connected to one terminal of the -12V power supply, and the other terminal of the gate switch SW11 is connected to the junction between the cathode terminal of the diode D11 and the resistor R12. The positive end of the diode D11 is connected to the connection point C, and the connection poi...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/68
Inventor 石虎载
Owner LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
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