CN2379721Y - Micro-computerized zero cross power control type electromagnetic range - Google Patents

Abstract

The utility model relates to a micro-computerized zero cross power control type electromagnetic range, which is composed of a keyboard, an indicator lamp, a range table surface, a casing, a circuit board which are connected. A circuit is composed of a micro-computer, a zero cross pulse generating circuit, a boiler body temperature detecting circuit, a module overheating detecting circuit, a buzzer, a display, the keyboard, a controlled switch, a rectifying filter circuit, a high frequency oscillating circuit, a driver, an electric power conversion module, an energy emitting circuit, a direct-current power supply, etc. which are mutually connected by each corresponding signal line. The utility model has the advantages of low cost, high reliability, and high electro-heat efficiency.

Description

Microcomputer is crossed zero energy control electromagnetic stove

The utility model is that microcomputer is crossed zero energy control electromagnetic stove, belongs to the Control Technique of Microcomputer field.

Electromagnetic stove is to utilize electromagnetic induction principle, and the electromagnetic field of high frequency by circuit produces tens KHzs produces eddy current on magnetic conduction pot body, thereby utilizes eddy current to make a pot body heating realize the cooking stove function.Zero passage control is sent control signal exactly and is made switch conduction or end when the input voltage of switch is zero.The control of microcomputer zero passage just is to use the microcomputer software program for execution to realize zero passage control.It is to use microcomputer as the control core that the microcomputer zero passage is controlled electromagnetic stove, and the working time of adopting microcomputer zero passage control technology to control electromagnetic stove power converter loop is controlled the electromagnetic stove of power output with the intermittent time ratio.The general mode that adopts the dutycycle (PWM) that changes the power model control utmost point (base stage or grid) high frequency square wave of the power control of existing electromagnetic stove, the someone uses the zero passage control technology as yet.No matter be the hardware zero passage control of pure electronic circuit or the control of microcomputer zero passage all as yet the someone use.The shortcoming of prior PWM control mode is the circuit more complicated, and debugging is difficulty relatively.And this non-zero passage control mode meeting generation due to voltage spikes in circuit, not only can improve the cost of loop of power circuit, and be unfavorable for that reliability improves.

The purpose of this utility model is exactly only to adopt the mode of the high frequency square wave dutycycle (PWM) of controlling power model and have control circuit complexity, the debugging shortcoming and the problem of difficulty, loop of power circuit cost height, poor reliability etc. in order to overcome and to solve existing electromagnetic stove, comparatively simple, cost is low, reliability is high control circuit in research, a kind of power control that can be applied to electromagnetic stove of design, and can cross zero energy control electromagnetic stove in conjunction with the microcomputer of realizing the zero passage power control mode by hardware and software program.

The utility model is realized by following structure technology scheme: the contour structures schematic diagram of electromagnetic stove as shown in Figure 1, its operation principle block diagram as shown in Figure 2, its circuit structure block diagram is as shown in Figure 3.It is connect and is constituted by keyboard 1, indicator lamp 2, kitchen range top face 3, casing 4, the load of circuit board mutual group, its interconnected relationship is: keyboard 1 and indicator lamp 2 are loaded on the front of casing 4, kitchen range top face 3 is installed in the middle of the end face of casing 4, circuit board is installed in the casing 4, keyboard 1 and indicator lamp 2 respectively with the casing interior circuit board on the corresponding keyboard input circuit of microcomputer, display output circuit be electrically connected mutually, corresponding energy radiating circuit is responded to connection mutually on kitchen range top face and the circuit board; Wherein: circuit is by microcomputer, zero-crossing pulse generation circuit, the temperature of boiler testing circuit, the module overheating detection circuit, buzzer, display, keyboard, controlled switch, current rectifying and wave filtering circuit 5,6, high-frequency oscillating circuits, driver, the power converter module, the energy radiating circuit, direct current DC power supply connects and composes jointly, its interconnected relationship is: microcomputer is respectively by the zero-crossing pulse holding wire, the temperature of boiler signal lines, the overheated signal lines of module, keyboard signal input line respectively with zero-crossing pulse generation circuit, the temperature of boiler testing circuit, the module overheating detection circuit, keyboard is corresponding to be electrically connected, simultaneously, microcomputer by computer bus respectively with buzzer, display, the controlled switch respective electric connects, controlled switch is electrically connected with current rectifying and wave filtering circuit 5 mutually by the controlled switch output line, high-frequency oscillating circuits is electrically connected with driver mutually by the high-frequency oscillation signal output line, the power converter module is respectively by the rectifying and wave-filtering holding wire, drive signal line, the power converter output line respectively with current rectifying and wave filtering circuit 5, driver, the energy radiating circuit is corresponding to be electrically connected, and current rectifying and wave filtering circuit 6 is respectively by transformer output electrical signal line, the rectifying and wave-filtering output signal line respectively with transformer, direct current DC power supply source respective electric connects; Its key is that microcomputer is connected with zero-crossing pulse generation circuit, controlled switch respective electric respectively by the control signal wire in zero-crossing pulse holding wire, the computer bus respectively, zero-crossing pulse generation circuit is electrically connected mutually with city's electrical signal line, and controlled switch is electrically connected back control energy radiating circuit mutually by controlled switch output line and current rectifying and wave filtering circuit and power converter module.Its circuit theory diagrams as shown in Figure 4, wherein: microcomputer is the MPU single-chip microcomputer, zero-crossing pulse generation circuit is by comparator integration member IC ₆, photoelectrical coupler integration member IC ₇, Zener diode Z ₁, Z ₃, resistance R ₁₂, R ₁₉, R ₂₆, capacitor C ₄And the formation that is connected in series; The temperature of boiler testing circuit is by temperature-sensitive switch device SWT ₂Constitute; The module overheating detection circuit is by temperature-sensitive switch device SWT, resistance R ₂₂, capacitor C ₇Connect and compose jointly; Buzzer is by connector I0 ₁, I0 ₂, buzzer device BUZZ, transistor Q ₁, resistance R ₁₈, capacitor C ₆Connect and compose jointly; Display is by LED ₁～LED ₃, resistance R ₂₈～R ₃₀Connection in series-parallel connects and composes, and keyboard is by button S ₁～S ₄Formation is connected in parallel; Controlled switch is by photoelectricity IGCT integration member IC ₁, IGCT TR ₁, resistance R ₁₁Formation is connected in parallel; Current rectifying and wave filtering circuit 5 is by rectifier bridge B ₂, inductance L ₁, resistance R ₉, capacitor C ₈, C ₉Connection in series-parallel connects and composes; Rectification circuit 6 is by rectifier bridge B ₃, capacitor C ₁₁Formation is connected in parallel; High-frequency oscillating circuits is by higher-order of oscillation integration member IC ₄, resistance R ₅～R ₇, R ₁₄, potentiometer RW, diode D ₆, D ₇, capacitor C ₁₄, C ₁₆Connect and compose jointly; Driver is by buffer integration member IC ₅, resistance R ₁, R ₂Formation is connected in parallel; The power converter module is power model IC ₂, the energy radiating circuit is by inductance L ₂, capacitor C ₁₀Formation is connected in parallel; Direct current DC power supply is by voltage-stablizer integration member IC ₃, resistance R ₁₃, capacitor C ₁₂, C ₁₃Connection in series-parallel connects and composes.

Its work operation logic: civil power is through the low-tension transformer step-down, separated into two parts behind the rectifying and wave-filtering again, and a part is supplied with fan work, and another part is supplied with microcomputer, display, low-voltage circuits such as keyboard after the voltage stabilizing of DC power supply source; City's signal of telecommunication by zero-crossing pulse generation processing of circuit after, produce zero-crossing pulse and flow to microcomputer, microcomputer detects the zero-crossing pulse of civil power, according to multiple condition, particularly watt level judges that controlled switch whether should conducting, and corresponding transmission conducting or pick-off signal are to controlled switch; Civil power is added to power transformation circuit by controlled switch and rectification circuit, and the civil power of power transformation circuit after with rectification becomes tens KHz high-frequency high-voltage signals, by the energy radiating circuit it is become the electromagnetic wave outside emission; After receiving this electromagnetic wave, the pot body generates heat.The temperature of boiler testing circuit detects temperature of boiler, converts the signal of telecommunication to and gives microcomputer, and the module overheating detection circuit detects whether overtemperature of power converter module, if overtemperature, just microcomputer is given in the number of delivering letters, and cuts off the supply of power transformation circuit energy by microcomputer control.The Keyboard Control power output, four button fourth gear power, be respectively 10., 1., 2., 3. shelves, 10. shelves are inactivity output, 3. shelves are full power output, grade are middle bay 1. grade, 2., every pressure button once, buzzer is one.10. shelves to be shown as three LED lights bright entirely, 1. shelves are for 1. number indicator lamp is bright, 2. shelves are for 2. number indicator lamp is bright, 3. grade for 3. number indicator lamp is bright.Its control method is: earlier city's signal of telecommunication is guided to zero-crossing pulse generation circuit, when line voltage is no-voltage, thereby a zero-crossing pulse is exported in the voltage generation saltus step of zero-crossing pulse circuit output end, microcomputer detects after the saltus step of this zero-crossing pulse, (also can add other conditions according to predefined power, as various protections) judge that controlled switch whether should conducting, if should conducting, then microcomputer is to controlled switch control end output Continuity signal, civil power enters electromagnetic stove high-frequency and high-voltage loop, at this moment, the energy radiating circuit is outwards launched electromagnetic wave; If should conducting, microcomputer output pick-off signal then, electromagnetic stove does not have electromagnetic wave outside emission, controlled switch ON time and the mean power of deadline than the energy that has determined to be launched; Because carrying out, the program of microcomputer (the Control Program for Microcomputers [Digital Research] flow chart as shown in Figure 5) need expend certain hour, therefore in the middle of the reality, conducting or by control signal when sending, the input voltage of controlled switch all thinks below 10% that at the input crest voltage microcomputer crosses zero energy control.

The utility model compared with prior art has following advantage and beneficial effect: the high-frequency and high-voltage working portion of (1) electromagnetic stove is applied to zero passage control can reduce requirement on devices in the electromagnetic stove, thereby can reduces cost the requirement on devices harshness; Carry out zero passage control and do not adopt the hardware zero passage of pure electronic circuit to control by software program simultaneously, can further reduce cost.ON time and ratio deadline are controlled in zero passage control simultaneously, thereby have controlled the power output of electromagnetic stove; (2) microcomputer is crossed zero energy control electromagnetic stove, and power/price is higher frequently, for the electromagnetic stove of peak power 1200W, hardware cost can be limited in 180 yuans, about 800 yuans, profit is considerable at present in the sale price of market, and market prospects are very wide; (3) microcomputer is crossed zero energy control electromagnetic stove, because supplying with, the power supply of major loop directly controlled by microcomputer, thus can design many effective protections, and, can realize many functions such as demonstration, warning easily because adopt intelligent chip; (4) microcomputer is crossed zero energy control electromagnetic stove and is had all advantages of electromagnetic stove.It utilizes electromagnetic induction principle heating, so the flames of anger when using, itself does not generate heat the kitchen range top, thereby it is little that the possibility of scalding takes place, and prevents accidents such as fire, blast, poisoning.It also has characteristics attractive in appearance, sanitation and hygiene in addition; (5) microcomputer is crossed zero energy control electromagnetic stove reliability than higher, and the possibility that power model burns is littler than other type electromagnetic stove; (6) to cross zero energy control electromagnetic stove electrothermal efficiency very high for microcomputer, through measuring, can reach more than 90%, imitate rule high (firewood less than 30%, about 40%, the electrothermal furnace of gas burner and micro-wave oven about 50%) than the electric heating of other types heating appliances, therefore be energy-saving product, the electromagnetic stove pan if form a complete production network is believed to replace coal gas stove and accessory commonly used at present in the future.

Can further specify as follows to Figure of description below: Fig. 1 is an electromagnetic stove contour structures schematic diagram, Fig. 2 crosses the operation principle block diagram of zero energy control electromagnetic stove for microcomputer, Fig. 3 crosses the circuit structure block diagram of zero energy control electromagnetic stove for microcomputer, Fig. 4 crosses the circuit theory diagrams that zero energy is controlled electromagnetic stove for microcomputer, and Fig. 5 crosses the Control Program for Microcomputers [Digital Research] FB(flow block) of zero energy control electromagnetic stove for microcomputer.Among each figure, 1 is that keyboard, 2 is that indicator lamp, 3 is that kitchen range top face, 4 is the electromagnetic stove casing; NET among the figure ₁, NET ₂, NET ₃, NET ₄, NET ₅, NET ₆, NET ₇, NET ₁₀, NET ₁₁, NET ₁₂Line end is corresponding separately respectively to link to each other.

Embodiment of the present utility model can be as follows: (1) can have production technology, method, the material of traditional electromagnetic stove by shown in Figure 1 and employing now, and this microcomputer of processing is crossed each parts of stoves such as casing of zero energy control electromagnetic stove; (2) by shown in Figure 4, the protracting circuit plate, and choose and screen components and parts, carry out the wiring harness plate.For example: IC ₁Optional TLP666 type or MOC3081 type, IC ₂Optional 1MBH60D type, IC ₃Optional 7805 types, IC ₄Optional 555 types, IC ₅Optional AN6721 type, IC ₆Optional C339 type, IC ₇, IC ₈Optional TLP521-4 type; The optional 89C51 type of microcomputer MPU; (3) press Fig. 2～shown in Figure 4, carry out general assembly and connect, again by compilation pc control software program shown in Figure 5; Simply debug by the described work operation logic of top specification then, just can implement the utility model preferably.

Claims (2)

1, a kind of indicator lamp that comprises, kitchen range top face, the microcomputer of casing is crossed zero energy control electromagnetic stove, its feature at it by keyboard (1), indicator lamp (2), kitchen range top face (3), casing (4), the load of circuit board mutual group connects formation, its interconnected relationship is: keyboard (1) and indicator lamp (2) are loaded on the front of casing (4), kitchen range top face (3) is installed in the middle of the end face of casing (4), circuit board is installed in the casing (4), keyboard (1) and indicator lamp (2) respectively with the casing interior circuit board on the corresponding keyboard input circuit of microcomputer, display output circuit is electrically connected mutually, and corresponding energy radiating circuit is responded to connection mutually on kitchen range top face and the circuit board; Wherein: circuit is by microcomputer, zero-crossing pulse generation circuit, the temperature of boiler testing circuit, the module overheating detection circuit, buzzer, display, keyboard, controlled switch, current rectifying and wave filtering circuit (5), (6), high-frequency oscillating circuits, driver, the power converter module, the energy radiating circuit, direct current DC power supply connects and composes jointly, its interconnected relationship is: microcomputer is respectively by the zero-crossing pulse holding wire, the temperature of boiler signal lines, the overheated signal lines of module, keyboard signal input line respectively with zero-crossing pulse generation circuit, the temperature of boiler testing circuit, the module overheating detection circuit, keyboard is corresponding to be electrically connected, simultaneously, microcomputer by computer bus respectively with buzzer, display, the controlled switch respective electric connects, controlled switch is electrically connected with current rectifying and wave filtering circuit (5) mutually by the controlled switch output line, high-frequency oscillating circuits is electrically connected with driver mutually by the high-frequency oscillation signal output line, the power converter module is respectively by the rectifying and wave-filtering holding wire, drive signal line, the power converter output line respectively with current rectifying and wave filtering circuit 5, driver, the energy radiating circuit is corresponding to be electrically connected, and current rectifying and wave filtering circuit (6) is respectively by transformer output electrical signal line, the rectifying and wave-filtering output signal line respectively with transformer, direct current DC power supply source respective electric connects; Its key is that microcomputer is connected with zero-crossing pulse generation circuit, controlled switch respective electric respectively by the control signal wire in zero-crossing pulse holding wire, the computer bus respectively, zero-crossing pulse generation circuit is electrically connected mutually with city's electrical signal line, and controlled switch is electrically connected back control energy radiating circuit mutually by controlled switch output line and current rectifying and wave filtering circuit and power converter module.

2, cross zero energy control electromagnetic stove by the described microcomputer of claim 1, it is characterized in that described microcomputer is the MPU single-chip microcomputer, zero-crossing pulse generation circuit is by comparator integration member IC ₆, photoelectrical coupler integration member IC ₇, Zener diode Z ₁, Z ₃, resistance R ₁₂, R ₁₉, R ₂₆, capacitor C ₄And the formation that is connected in series; The temperature of boiler testing circuit is by temperature-sensitive switch device SWT ₂Constitute; The module overheating detection circuit is by temperature-sensitive switch device SWT, resistance R ₂₂, capacitor C ₇Connect and compose jointly; Buzzer is by connector I0 ₁, I0 ₂, buzzer device BUZZ, transistor Q ₁, resistance R ₁₈, capacitor C ₆Connect and compose jointly; Display is by LED ₁～LED ₃, resistance R ₂₈～R ₃₀Connection in series-parallel connects and composes, and keyboard is by button S ₁～S ₄Formation is connected in parallel; Controlled switch is by photoelectricity IGCT integration member IC ₁, IGCT TR ₁, resistance R ₁₁Formation is connected in parallel; Current rectifying and wave filtering circuit 5 is by rectifier bridge B ₂, inductance L ₁, resistance R ₉, capacitor C ₈, C ₉Connection in series-parallel connects and composes; Rectification circuit 6 is by rectifier bridge B ₃, capacitor C ₁₁Formation is connected in parallel; High-frequency oscillating circuits is by higher-order of oscillation integration member IC ₄, resistance R ₅～R ₇, R ₁₄, potentiometer RW, diode D ₆, D ₇, capacitor C ₁₄, C ₁₆Connect and compose jointly; Driver is by buffer integration member IC ₅, resistance R ₁, R ₂Formation is connected in parallel; The power converter module is power model IC ₂, the energy radiating circuit is by inductance L ₂, capacitor C ₁₀Formation is connected in parallel; Direct current DC power supply is by voltage-stablizer integration member IC ₃, resistance R ₁₃, capacitor C ₁₂, C ₁₃Connection in series-parallel connects and composes.

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