CN2172598Y

CN2172598Y - Controlling device for intelligent electric pot

Info

Publication number: CN2172598Y
Application number: CN 92221044
Authority: CN
Inventors: 李越
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-28
Filing date: 1992-09-28
Publication date: 1994-07-27
Anticipated expiration: 2002-09-28

Abstract

The utility model relates to an electric cooker with automatic control device, which directly convert the temperature signal into the frequency signal which is input a monolithic computer, and hence, the utility model can realize the control of a plurality of temperature curves. The utility model comprises a sensor, a converting circuit, a monolithic computer, an electrical relay, liquid crystal drive, and a display circuit. The utility model can input the timing time and the performed function, and the utility model can complete the tasks according to the temperature and the empirical data. The utility model has the advantages of simple operation, energy saving, wide application range, etc.

Description

Controlling device for intelligent electric pot

The utility model relates to a kind of automatic temperature control that is exclusively used in firing equipment, relates to a kind of temperature control equipment of grill pan or rather.

The automatic temperature control of existing electric cooker generally is made up of control and heating two parts.Its control element is a magnetic switch, when kettle temperature reaches certain value, the magnetic of magnetic switch disappears, lever is resetted, cut off heating power supply, owing to can only detect a temperature spot, therefore can not be according to the temperature of how much controlling of the kind of food and food, the grill pan of this control mode can only cooking rice, can not be used to cook congee, milk etc., thereby limit its scope of application and function.

Present in addition computer electric cooker, though added single-chip microcomputer, temperature signal all is to convert voltage signal earlier to, by voltage comparator input single-chip microcomputer, temperature spot of this structures shape needs a comparator, along with the increase of required function, temperature spot also increases certainly, and this must constantly increase comparator, increasing of comparator, on the one hand cost is increased, reliability decrease, and also the input port line that takies single-chip microcomputer also increases.

The purpose of this utility model is a kind of intelligent multifunctional grill pan control device of design, overcomes the shortcoming of voltage comparator, makes it to have multi-functional, and application region is characteristics widely, and it not only can cooking rice, and can cook congee, boil milk, boiled egg etc.

The utility model comprises temperature sensor, the change-over circuit that temperature signal is changed into frequency signal, and the executing agency of heating and be the control circuit of core control part with the single-chip microcomputer.The temperature signal that records according to temperature sensor, convert the correspondent frequency signal to, single-chip microcomputer can record extraneous temperature by measured frequency, single-chip microcomputer is by the temperature that constantly records and according to the food species information of manually inserting, determine power parameter and time parameter, executing agency receives the work of single-chip microcomputer order control heating part; The kind of the expectation chow that the data explicit user that export according to single-chip microcomputer the display part is inserted and the food of present institute boiling.

Describe technology of the present utility model in detail below in conjunction with accompanying drawing.

Accompanying drawing 1 is a grill pan control device observing and controlling schematic diagram.

Accompanying drawing 2 is the display part electrical schematic diagram of the control device of grill pan.

Accompanying drawing 3 is structure charts of intelligent grill pan.

Referring to accompanying drawing 1,100 is single-chip microcomputer (8051,8751) among the figure, temperature sensor R _TAnd temperature frequency change-over circuit 101, the kettle temperature signal is converted to frequency signal, electric current passes through R _TTo capacitor C ₁Charging is when the electric capacity two ends reach certain value 2/3V _DOThe time, the rest-set flip-flop upset, this level makes triode T ₁Discharge descends the voltage at electric capacity two ends, when reducing to 1/3V _DOThe time, RS sends out device and overturns once more, makes T ₁End, to C ₁Continue charging.T ₀Be the counting input end of single-chip microcomputer, can constantly record the interior temperature of pot by single-chip microcomputer like this.Single-chip microcomputer is according to a series of empirical datas of being stored, and temperature, and rate of rise in temperature provides corresponding power time control parameter control heating overall process.

Single-chip microcomputer 100 output control terminal P _1.4Outputing control signals to executing agency is relay 102, control heating power supply switch, single-chip microcomputer 100 output control terminal P _1.5Outputing control signals to executing agency is buzzer electrical equipment 103, is controlled at eating time one and reminds owner to sending sound equipment immediately, closes buzzer every a period of time, and control device enters keeping warm mode then.

Circuit 104 is start reset circuits among the figure, K ₁Be manual zero clearing button, single-chip microcomputer P1.0-P _1.3 Termination key circuit 105 comprises pull-up resistor R ₄-R ₇And the button K of series connection ₂-K ₅, K wherein ₂, K ₃Expression chow button makes control device suitable closed power supply before serving the meal begin heating, K ₄Be used to select food species, K ₅Be the beginning button.

Referring to accompanying drawing 2,106 is oscillating circuit among the figure, is made up of monostable oscillator 4047 and peripheral circuit, and wherein 12 pin are output as the synchronous working signal of decoding, driving, liquid crystal display, the P of single-chip microcomputer 100 _0.0-P _0.3Be digital output signal 4 decodings extremely shown in Figure 2, the digital input end of drive circuit 7211, the P of single-chip microcomputer 100 _2.0-P _2.3To 7211 the control end of Fig. 2, to determine to show that one-bit digital.The INT of single-chip microcomputer 100 ₀-INT ₁RD, WR export 4054 of Fig. 2 to, show its function.The LCD of Fig. 2 is 4500.

Accompanying drawing 3 is structure charts of intelligent grill pan, 1, be control circuit, comprise demonstration, button etc.2, be sensor.3, power circuit, it provides necessary power supply for control circuit.4, heater, it is the major part of grill pan heating.5, pot lining.6, interior pot.7, shell.8, pot cover

Claims

1, the control device of general computer grill pan is made up of three parts, promptly measure the temperature sensor that is positioned at the electric hot tray center of kettle temperature, control circuit that kettle temperature is controlled and the power circuit that dc source is provided for control circuit, control circuit of the present utility model also comprises temperature to be had--freq converting circuit, it is characterized in that: as temperature sensor, flow through R by thermistor _TElectric current electric capacity is charged, through two voltage comparators, the output of comparator is as the Q end control triode of the input of rest-set flip-flop, trigger; And comparator A ₁Positive input termination reference voltage, comparator A ₂Negative input end connects reference voltage; The output Q of rest-set flip-flop connects the counter input of single-chip microcomputer; Wherein temperature sensor is positioned at the center of electric hot tray; Control circuit is positioned at the side of grill pan.

2, a kind of intelligent multifunctional grill pan control according to claim 1 is characterized in that described control circuit single-chip microcomputer also is connected with the LCD panel that is used to show chow and present performed function and decoding thereof, driving electrical equipment.

3, a kind of intelligent multifunctional grill pan control device according to claim 1 is characterized in that described single-chip processor i/o mouth also is connected to the button inputting circuits of timing and execution function.

4, a kind of intelligent multifunctional grill pan control device according to claim 1 is characterized in that described control circuit single-chip processor i/o mouth also is connected to executing agency's relay circuit of control electric hot tray.

5, a kind of intelligent multifunctional grill pan control device according to claim 1 is characterized in that described control circuit single-chip processor i/o mouth also is connected to buzz circuit.