CN201477454U

CN201477454U - Microcomputer electric kettle control panel

Info

Publication number: CN201477454U
Application number: CN2009201618631U
Authority: CN
Inventors: 沈彦松
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-09
Filing date: 2009-07-09
Publication date: 2010-05-19
Anticipated expiration: 2019-07-09

Abstract

The utility model discloses a microcomputer electric kettle control panel, wherein a protective tube and a heating pipe are connected in series to form a heating circuit. The panel is characterized in that the heating circuit is connected in series with a relay controlling the on and off of the heating circuit; the power supply pin of the relay is connected with a single chip microcomputer controlling circuit to completely control the connection and disconnection of the relay; one I/O port of the single chip microcomputer is connected with a thermistor for sampling temperature; and two ends of the thermistor are connected in parallel with a normally opened temperature controller for preventing dry heating. The control panel achieves intelligent control by controlling the connection and disconnection of the relay in the heating circuit through single chip microcomputer program, and the temperature controller for preventing dry heating is normally in power-off state without current, therefore, the control panel has longer service life; and the control panel does not need high-current resisting temperature controller, thus effectively controlling the product cost.

Description

A kind of microcomputer electric kettle control panel

Technical field

The utility model belongs to a kind of household electrical appliance control circuit, is specifically related to a kind of main microcomputer electric kettle control panel by the single-chip microcomputer Based Intelligent Control.

Background technology

At present, insulating pot has become widely used household electrical appliance.In existing insulating pot control circuit, normally control heating-up temperature by the normally closed temperature controller of connecting on the electrothermal tube circuit and prevent that the dry combustion method situation from taking place, when dry combustion method, temperature can very fast rising make temperature controller disconnect, heater circuit quits work, to prevent dry combustion method; But after temperature descends, temperature controller is conducting once more, heater circuit is also reworked and is continued dry combustion method, therefore in the dry combustion method process, exist to burn out phenomenons such as temperature controller, electrothermal tube easily, and temperature controller is to connect with electrothermal tube that temperature controller is with the electrothermal tube heating of working in the heating process, there is equally big electric current to pass through, to causing very big influence the serviceable life of temperature controller, temperature controller damages easily after use a period of time like this, and the anti-dry function is also along with not playing effect.Simultaneously, existing insulating pot circuit control panel is owing to rely on simple discrete electronic component such as resistance, electric capacity, inductance to constitute fully, and function is simple and unstable and be not durable for temperature controlling.

The utility model content

For the deficiency that solves existing insulating pot anti-dry function and function simple technique problem too, the utility model provides a kind of microcomputer electric kettle control panel.

For achieving the above object, the technical scheme that the utility model adopted is:

A kind of microcomputer electric kettle control panel, constitute heater circuit by protective tube and heating tube series connection, the relay that it is characterized in that in the described heater circuit series connection control heater circuit work and disconnection, the supply pin and the single chip machine controlling circuit of described relay join, and make relay conducting, disconnection controlled by the single-chip microcomputer setting program.

Preferably, described single chip machine controlling circuit is by rectification circuit, filtering circuit, reduction voltage circuit, direct current regulation circuit, single-chip microcomputer and SCM peripheral circuit.

Preferably, one of described single-chip processor i/o mouth connects a thermistor for its sample temperature, and this thermistor two ends parallel connection one prevents the open type temperature controller of dry combustion method.

Preferably, described SCM peripheral circuit comprises that one shows the charactron of the water temperature of coming by the thermistor sampling in real time.

Preferably, described SCM peripheral circuit I/O mouth connects four gauge tap, and described gauge tap is: power switch, the functional switch of making tea, heat milk functional switch and automatic function switch.

Preferably, described SCM peripheral circuit comprises a function prompt hummer.

Preferably, described thermistor and open type temperature controller are responded to water temperature at the bottom of being installed in insulating pot.

Preferably, described open type temperature controller operating temperature is for arriving 125 ℃ of closures.

The utility model reaches the purpose of Based Intelligent Control by the relay conducting in the Single-chip Controlling heater circuit, disconnection, simultaneously, temperature controller in the utility model anti-dry circuit generally is in the disconnection no current state always, therefore, life-span is longer, and the temperature controller that does not need anti-high electric current has effectively been controlled the cost of product.

Description of drawings

Fig. 1 is the local circuit structural representation of the utility model preferred embodiment; Among the figure:

F1: protective tube, K1:12V relay, R5: heat-generating pipe

R1: divider resistance, R2: current-limiting resistance, C1: step-down filter capacitor

D2: diode D3: diode D4: diode

D5: diode D1: voltage stabilizing diode R3: current-limiting resistance

R4: thermistor K2: open type temperature controller

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

As shown in Figure 1, the utility model heater circuit is made of protective tube F1,12V relay K 1, heat-generating pipe R5 series connection, the supply pin and the single chip machine controlling circuit of 12V relay K 1 join, and single-chip microcomputer is controlled heater circuit work by the 12V power supply of programmed control 12V relay and still disconnected.

As shown in Figure 1, the utility model is by step-down filter capacitor C1 step-down, again by current-limiting resistance R2 current limliting, four diode D2, D3, D4, D5 constitute classical rectifier bridge, described four diode D2, D3, D4, D5 model are IN4007, voltage stabilizing diode D1 plus earth, and voltage stabilizing diode D1 negative pole connects the positive pole of rectifier bridge output, rectifier bridge is the direct supply of 12V with AC rectification, is transformed to the required 5V power supply of single-chip microcomputer by current-limiting resistance R3 and three-terminal voltage-stabilizing pipe 78L05 again.

As shown in Figure 1, one of single-chip processor i/o mouth in the utility model single chip machine controlling circuit connects a thermistor R4 for its temperature sampling, this thermistor R4 two ends parallel connection one prevents the open type temperature controller K2 of dry combustion method, thermistor R4 and open type temperature controller K2 respond to water temperature at the bottom of being installed in insulating pot, described open type temperature controller operating temperature is for arriving 125 ℃ of closures, and the SCM peripheral circuit comprises that also one shows the charactron of the water temperature of coming by the thermistor sampling in real time.

SCM peripheral circuit I/O mouth also connects four gauge tap, and described gauge tap is: power switch, the functional switch of making tea, heat milk functional switch and automatic function switch, the SCM peripheral circuit also comprises a function prompt hummer.

The program normal control flow journey of single-chip microcomputer is: circuit is started working after pressing power switch, when pressing when making tea functional switch, the conducting of Single-chip Controlling relay, heater circuit is started working, Single-chip Controlling relay disconnection heater circuit quits work after water is boiled, water temperature reduces the conducting once more of back Single-chip Controlling relay, and so circulation makes water temperature remain at 100 ℃; When pressing heat milk functional switch, Single-chip Controlling relay conducting heater circuit is started working, stop heating after insulating pot is heated to 100 ℃ to water, simultaneously hummer sends " dripping " one, is reduced to 60 when spending up to water temperature, the conducting once more of Single-chip Controlling relay, under the situation that does not add cold water, only water is heated to 65 degree, automatic heat preservings then for the second time, the circulation heating is spent to 65 degree thereby water temperature is controlled at 60; When pressing the automatic function switch, Single-chip Controlling relay conducting heater circuit is started working, the Single-chip Controlling relay disconnected and stops heating after insulating pot heated the water to one hundred degrees, send " dripping " simultaneously one, when water temperature is reduced to 95 when spending, single-chip microcomputer pilot relay conducting again reheats water, being heated to 100 degree stops again, thereby water temperature is controlled at 95 to 100 degree scopes, below water temperature is in 100 degree during arbitrary temperature spot, when pressing the automatic function switch once more, single chip machine controlling circuit is heated to 100 degree again at once to water to be stopped again, can force heating so at any time, when nothing is done any operation, 95 degree to 100 degree circulations just stop for eight times automatically, are ready.

In when, in the programmed control flow process of single-chip microcomputer dry combustion method taking place, be that the insulating pot temperature is when reaching open type temperature controller K2 operating temperature, open type temperature controller K2 closure makes that single-chip microcomputer sampling thermistor R4 two ends resistance is 0,1 disconnection quits work heater circuit thereby single-chip microcomputer is controlled the 12V relay K at once, simultaneously hummer send " drip, drip, drip,,,,,,, " cry, charactron shows dry combustion method symbol " E2 ", if the untimely water reduction temperature that adds disconnects open type temperature controller K2, then single-chip microcomputer will shut down automatically.

It is to heat or stop heating, convenient realization Based Intelligent Control and multi-functional realization that the utility model is controlled insulating pot by the mode of the relay on-off in the Single-chip Controlling heater circuit; Simultaneously, the utility model utilizes the mode of temperature controller thermistor in parallel, be that the insulating pot temperature is when reaching open type temperature controller operating temperature, open type temperature controller closure makes that single-chip microcomputer sampling thermistor two ends resistance is 0, and 1 disconnection quits work heater circuit thereby single-chip microcomputer is controlled the 12V relay K at once, and temperature controller generally is in the disconnection no current state always, therefore, life-span is longer, and does not need the temperature controller of anti-high electric current, has effectively controlled the cost of product.

Above-described only is the preferred implementation of a kind of microcomputer electric kettle of the utility model control panel; should be understood that; for the person of ordinary skill of the art; under the prerequisite that does not break away from the utility model creation design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims

1. microcomputer electric kettle control panel, constitute heater circuit by protective tube and heating tube series connection, the relay that it is characterized in that in the described heater circuit series connection control heater circuit work and disconnection, the supply pin and the single chip machine controlling circuit of described relay join, and make relay conducting, disconnection controlled by the single-chip microcomputer setting program.

2. according to the described a kind of microcomputer electric kettle control panel of claim 1, it is characterized in that described single chip machine controlling circuit is by rectification circuit, filtering circuit, reduction voltage circuit, direct current regulation circuit, single-chip microcomputer and SCM peripheral circuit.

3. according to the described a kind of microcomputer electric kettle control panel of claim 1, it is characterized in that one of described single-chip processor i/o mouth connects a thermistor for its sample temperature, this thermistor two ends parallel connection one prevents the open type temperature controller of dry combustion method.

4. according to the described a kind of microcomputer electric kettle control panel of claim 1, it is characterized in that described SCM peripheral circuit comprises that one shows the charactron of the water temperature of coming by the thermistor sampling in real time.

5. according to the described a kind of microcomputer electric kettle control panel of claim 1, it is characterized in that described single-chip processor i/o mouth connects four gauge tap, described gauge tap is: power switch, the functional switch of making tea, heat milk functional switch and automatic function switch.

6. according to the described a kind of microcomputer electric kettle control panel of claim 1, it is characterized in that described SCM peripheral circuit comprises a function prompt hummer.

7. according to the described a kind of microcomputer electric kettle control panel of claim 3, it is characterized in that responding to water temperature at the bottom of described thermistor and open type temperature controller are installed in insulating pot.

8. according to the described a kind of microcomputer electric kettle control panel of claim 7, it is characterized in that described open type temperature controller operating temperature is for arriving 125 ℃ of closures.