CN200966549Y - Computer controller of electromagnetic pressure cooker - Google Patents
Computer controller of electromagnetic pressure cooker Download PDFInfo
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- CN200966549Y CN200966549Y CN 200620065798 CN200620065798U CN200966549Y CN 200966549 Y CN200966549 Y CN 200966549Y CN 200620065798 CN200620065798 CN 200620065798 CN 200620065798 U CN200620065798 U CN 200620065798U CN 200966549 Y CN200966549 Y CN 200966549Y
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Abstract
The utility model discloses an electromagnetic pressure cooker controller, which comprises a micro-computer MCU, a key input circuit, a heat insulation power control circuit, a temperature sampling circuit, a LCD circuit, a power supply circuit, an automatic vent and a pressure constant circuit and an inductive power control circuit, all the function circuits are connected with the relevant functional interfaces on the computer MCU; the automatic vent and the constant pressure circuit are provided with a solenoid valve, the circuit is connected with the relevant interface of the micro-computer MCU; the inductive power control circuit is connected with two ordinary pins of the micro-computer MCU, both two negative poles of a diode D25, D26 shall be connected and earthed through a resistor R29 to form a loop, thus the level at the contactor with the R29 can be used for the analog of PWM signal to realize the step adjustment and drive power output. The utility model can directly heat through the inner pan, compared with the indirect heating of electric cooker inner pot though electric heating coil, greatly improve the heat efficiency.
Description
Technical field
The utility model relates to a kind of pressure cooker computer controller, particularly a kind of electromagnetic pressure pot computer controller that utilizes electromagnetic induction heating.
Background technology
General pressure cooker all is to adopt the electric hot tray of embedded resistive heater to heat, and wherein control section has mechanical type and computermatic.Adopt the electric cooker of the electric hot tray heating of embedded resistive heater that two significant disadvantage are arranged: 1, the thermal efficiency is low; 2, power can not be realized the stepping adjusting.
Simultaneously, general electric hot tray electric cooker and electromagnetic induction heating electric cooker, since blow-by in the process of cooking, pot inner and outer air pressure unanimity, cause the moisture in the meal partly to evaporate, and the feasible unnecessary consumption that has caused the energy of heat has been taken away in evaporation with relevant nutritional labeling.
The utility model content
The purpose of this utility model is to provide a kind of can improve the thermal efficiency, realize that stepping regulates, and the electric pressure cooking saucepan controller of the electromagnetic induction heating of can the pressure lower seal about 50-70KPA cooking.
The purpose of this utility model can realize by following technical measures: comprise micro computer MCU, button inputting circuits, insulation power control circuit, temperature sampling circuit, liquid crystal display circuit, power-supplying circuit, automatic vent pressurize circuit and induced power control circuit, above-mentioned each functional circuit is gone up the function corresponding interface with micro computer MCU and is connected; Described automatic vent pressurize circuit is provided with a magnetic valve, and the floss hole on the pot top carries out safeguard protection, concentrates steam discharge automatically simultaneously after the end of cooking, and this circuit is connected with micro computer MCU the corresponding interface; Two common pins of described induced power control circuit and micro computer MCU are connected, the resistance R 76 of one of them pin of MCU in the induced power control circuit connects the anode of diode D25, the resistance R 78 of another pin in the induced power control circuit connects the anode of diode D26, two negative electrodes of diode D25, D26 link to each other and through resistance R 29 ground connection, form the loop, thereby utilization is simulated the output of pwm signal realization stepping adjusting driving power with the level at the contact place of R29.
The utility model also comprises and is used to make controller to be in the down Monitor Unit circuit of low power consumpting state, and this circuit is connected with the corresponding interface on the micro computer MCU.
Temperature sampling circuit described in the utility model is provided with three temperature sensors that place the bottom of a pan BOM, power device IGBT and pot top TOP respectively, and three tunnel temperature detection are connected with the corresponding interface on the micro computer MCU respectively.
The utility model also comprises auditory tone cues electric circuit and indicator light circuit, and described auditory tone cues electric circuit and insulation power control circuit are connected to the common I/O pin of micro computer MCU jointly, and indicator light circuit is connected with the corresponding interface of micro computer MCU.In the scheme of this electromagnetic pressure pot, the I/O pin of the single-chip microprocessor MCU that adopts is not enough, so just control the switching characteristic of a relay according to thermal circuit, need frequency waveform control characteristic different of an interchange with the audible alarm circuit, I/O pin of ingenious usefulness utilizes software to produce switching signal and frequency signal is controlled this two equipment respectively, so just save the I/O resource, improved the utilization ratio of MCU.
The utility model also comprises current detection circuit, and it is by current transformer B1, adjustable resistance RV, and resistance R 19, R26, R27, R*, diode D13-D16, D20, capacitor C 19, C20, C27 form, and are connected to the common I/O pin of described micro computer MCU.Single-chip microprocessor MCU in this technical scheme is owing to have only 4 road A/D mouths, three tunnel temperature sampling (lower curtate temperature, head temperature and IGBT temperature) and voltage sample have been distributed to fully, remaining a current sampling signal does not have the A/D mouth to use, so use a common I/O mouth to go that electric current is had the signals collecting that does not have, thereby judging to have does not have pot to be heated, there is pot to be heated to be current signal, for this I/O pin level is a high level; When not having pot when being heated, just there is not current signal, this I/O pin level is a low level, has so just realized using common I/O pin to realize the sampling work of electric current.
The utility model is realized varying level output by two the common pins that utilize micro computer MCU, thereby simulation pwm signal grading control power output, make the induced power control circuit produce the consecutive pulses signal, driving power components and parts IGBT, make solenoid and big electric capacity produce vibration, thereby the electromagnetic wave about the 20KHz that produces produces the electronics eddy current and heats in pot.Because be internally directly heating of pot, thermal efficiency ratio adopts the mode of pot in the electric hot tray indirect electric cooker to improve 10%, reaches more than 85%; The down Monitor Unit circuit is set in addition, and fast detecting reduces the power consumption of back-up source to power down and enter low power consumpting state when power down, makes controller continue the in good time time clock feature of demonstration under power-down conditions.
Description of drawings
Fig. 1 is the utility model electromagnetic pressure pot computer controller theory diagram;
Fig. 2 is MCU control panel circuit theory diagrams of the present utility model;
Fig. 3 is that output of the present utility model drives the control panel circuit theory diagrams;
Fig. 4 is a main program flow block diagram of the present utility model.
The specific embodiment
As shown in Figure 1, hardware of the present utility model partly comprise micro computer MCU, key press detecting circuit, the reserve battery circuit that resets, brilliant battle array clock circuit, power-fail detection circuit, auditory tone cues electric circuit, liquid crystal display circuit, indicator light circuit, backlight lighting circuit, induced power control circuit, insulation power control circuit, temperature sampling circuit, current detection circuit, voltage detecting circuit, cooling fan control circuit, Switching Power Supply power supply circuits, automatic vent pressurize circuit and EMC filter circuit.
Foregoing circuit is divided on two wiring boards, and first is keypad, and second is control panel, they is connected with the winding displacement cable with combination hub.Mainly contain micro computer MCU, key press detecting circuit on the keypad, the induced power control circuit of the reserve battery circuit that resets, brilliant battle array clock circuit, power-fail detection circuit, auditory tone cues electric circuit, liquid crystal display circuit, indicator light circuit, backlight lighting circuit and part.Mainly contain insulation power control circuit, temperature sampling circuit, current detection circuit, voltage detecting circuit, induced power control circuit, cooling fan control circuit, Switching Power Supply power supply circuits, automatic vent pressurize circuit and EMC filter circuit on the control panel.Above-mentioned each functional circuit is connected with corresponding port on the micro computer MCU.Keypad mainly is responsible for user interface such as button, demonstration and sound, and the collection capacity of control logic and input is handled.Control panel mainly is responsible for gathering various monitoring variables and output drives control.
As shown in Figure 2, the electrical schematic diagram of micro computer MCU control panel of the present utility model.Mainly comprise following:
Backlight lighting circuit (9), resistance R 54, triode Q8 and backlight are formed, and are connected to the I/O pin of micro computer MCU by resistance R 56, control by program.
Auditory tone cues electric circuit (10) mainly is made up of buzzer BUZ1, resistance R 51, triode Q7, is connected to the pin of micro computer MCU through resistance R 52.
The reserve battery circuit (11) that resets mainly is made up of battery cell, resistance R 53, R75, diode D28, capacitor C 35, C36, C37.
MCU main circuit (12) mainly contains MCU, and the liquid crystal mouth of MCU drives the liquid crystal mouth and shows, A/D mouth mainly sample bottom temp, head temperature, IGBT temperature and voltage, and the I/O mouth mainly is responsible for various input signals and output drives.
Button inputting circuits (13) mainly is made up of diode D22-D24 and button S1-S9, is connected to the pin of micro computer MCU through resistance R 58-R67.
Indicator light circuit (14), mainly by light emitting diode L1-L5, triode Q9, Q10 and resistance R 64, R68 form, and are connected to the respective pin of MCU again by resistance R 58-R61.
Down Monitor Unit circuit (15) mainly is made up of resistance R 71-R74, triode Q11, capacitor C 30, and the colelctor electrode of triode Q11 is connected to the pin of micro computer MCU through resistance R 72.
Crystal oscillator clock circuit (16), master clock circuit and secondary clock circuit 10 are connected to the pin of MCU.
Insulation power output control circuit (18) mainly is made up of relay 8F, triode Q13, diode D29, is connected to the I/O pin of micro computer MCU.
As shown in Figure 3, output of the present utility model drives the circuit theory diagrams of control panel, mainly comprises following:
Switching Power Supply power supply circuits (1) are mainly by single-chip switching power supply U1, optocoupler U2, voltage-stabiliser tube U3, Z1, Z2, triode Q1, Q2, inductance L 3-L5, switch transformer B1, diode D4-D12, capacitor C 6-C16, CY, resistance R 4-R12, R14, R79, R80, RL, RF form.
Temperature sampling circuit (2); mainly be made up of three temperature sensors, resistance R 44, R45, R47 and capacitor C 28, C29, the C31 that place the bottom of a pan BOM, power device IGBT temperature protection and pot top TOP respectively, three tunnel temperature detection are connected respectively to the corresponding A/D pin of micro computer MCU.
Fan drive circuit (3) mainly is made up of triode Q6, resistance R 48-R50 and diode D21, is connected to the I/O of MCU.LCD MODULE 9 is connected to the demonstration signal output port of MCU.)
EMC filter circuit (4), by inductance L, capacitor C is formed, and utilizes this filter circuit well to solve, the Conduction Interference of being brought by electromagnetic induction heating and Switching Power Supply.
Induction heating power control circuit (5), mainly by bridge heap DD, inductance L 1, power heater coil L2, capacitor C 2, C3, C17, C18, C21-C26, resistance R 13, R15-R18, R20-R25, R28-R35, R39-R42, RG, R69, R70, R76, R78, diode D17-D19, D25, D26, triode Q3-Q5, Q12, voltage-stabiliser tube Z3, power tube IGBT, amplifier LM339 forms, and is connected respectively to the respective pin of micro computer MCU.The utility model has adopted two common pins of micro computer MCU, meets the resistance R 76, the R78 that have calculated resistance in advance respectively, gets back to ground through D25, D26 and R29 again, forms the loop.Utilization is simulated the output of PWM level driving power with the level at the contact place of R29 like this, and different output has realized stepping control according to MCU.Realized not carrying out stepping control, reduced product cost with the MCU of PWM.
Current detection circuit (6), mainly by current transformer B1, adjustable resistance RV, resistance R 19, R26, R27, R*, diode D13-D16, D20, capacitor C 19, C20, C27 forms, be connected to the respective pin of micro computer MCU, single-chip microprocessor MCU in this technical scheme is owing to have only 4 road A/D mouths, distributed to three tunnel temperature sampling (lower curtate temperature fully, head temperature and IGBT temperature) and voltage sample, remaining a current sampling signal does not have the A/D mouth to use, so use a common I/O mouth to go that electric current is had the signals collecting that does not have, thereby judging to have does not have pot to be heated, and has pot to be heated to be current signal, for this I/O pin level is a high level; When not having pot when being heated, just there is not current signal, this I/O pin level is a low level, has so just realized using common I/O pin to realize the sampling work of electric current.
Automatic vent holding pressure control circuit (7), mainly by magnetic valve, resistance R 47, triode Q*, diode D27 and D* are connected to the respective pin of micro computer MCU.In the utility model, because chip internal resource anxiety, so all use the pin of micro computer MCU to control automatic vent holding pressure control circuit (7) and auditory tone cues electric circuit (10).Automatic vent holding pressure control circuit (7) is the DC control pattern, and auditory tone cues electric circuit (10) is to exchange control model, distinguishes the different control object of control by MCU internal control software.Save the I/O resource of MCU, reduced the cost of entire controller.
Voltage detecting circuit (8), mainly by diode D1-D3, resistance R 1-R3, capacitor C 5 and C5* form, and are connected to the respective pin of micro computer MCU.
As shown in Figure 4, main program flow of the present utility model is: after MCU resets, enter initialization, next main program begins, and judges whether to be in power-down state, if just show present clock in that power-down state is next, and enters low power consumpting state.If there is not power down, then judge whether to occur abnormal conditions, then show the code of makeing mistakes if any abnormal conditions, close various cooking functions and audible alarm is arranged.If do not have abnormal conditions then carry out function corresponding.
In the process of cooking be: the phase I suction gelatinization course of work of boosting adopts high-power; Second stage is heated to the process that keep-ups pressure after the operating pressure, rice is heated evenly use simultaneously comprehensive heating function to make rice fully absorb water heat absorption and expansion process, operating pressure is at 45KPA-75KPA, and pressure no longer heats after exceeding standard, and program is according to judging steam bleeding step-down on a small quantity; The phase III pressure maintaining period carries out automatic opens solenoid valve steam discharge after finishing, and discharges redundant moisture by concentrating quick steam discharge like this, and steam is to gush out fast from rice, reaches fluffy good to eat that whole pot rice all pushes up, and evenly; The quadravalence section adopts insulation power.
Claims (6)
1, a kind of electromagnetic pressure pot computer controller, comprise micro computer MCU, button inputting circuits, insulation power control circuit, temperature sampling circuit, liquid crystal display circuit, power-supplying circuit, automatic vent pressurize circuit and induced power control circuit, above-mentioned each functional circuit is gone up the function corresponding interface with micro computer MCU and is connected; It is characterized in that: described automatic vent pressurize circuit is provided with a magnetic valve, places the floss hole on pot top; Two common pins of described induced power control circuit and micro computer MCU are connected, the resistance R 76 of one of them pin of MCU in the induced power control circuit connects the anode of diode D25, the resistance R 78 of another pin in the induced power control circuit connects the anode of diode D26, two negative electrodes of diode D25, D26 link to each other and through resistance R 29 ground connection, form the loop; The level at the contact place of resistance R 29 is as being used to realize stepping adjusting driving power output simulation pwm signal.
2, electromagnetic pressure pot computer controller according to claim 1, it is characterized in that: described temperature sampling circuit is provided with three temperature sensors that place the bottom of a pan, power device IGBT and pot top respectively, and three tunnel temperature detection are connected with the corresponding interface on the micro computer MCU respectively.
3, electromagnetic pressure pot computer controller according to claim 1 is characterized in that: comprise also being used to make controller to be in the down Monitor Unit circuit of low power consumpting state that this circuit is connected with the corresponding interface on the micro computer MCU.
4, electromagnetic pressure pot computer controller according to claim 1, it is characterized in that: also comprise auditory tone cues electric circuit and indicator light circuit, described auditory tone cues electric circuit and insulation power control circuit are connected to the common I/O pin of micro computer MCU jointly, and indicator light circuit is connected with the corresponding interface of micro computer MCU.
5, electromagnetic pressure pot computer controller according to claim 1 is characterized in that: also comprise the reserve battery circuit that resets that is used to provide back-up source and tool reset function, this circuit is connected with the corresponding interface on the micro computer MCU.
6, electromagnetic pressure pot computer controller according to claim 1 is characterized in that: also comprise current detection circuit, this circuit is connected to the common I/O pin of described micro computer MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620065798 CN200966549Y (en) | 2006-10-17 | 2006-10-17 | Computer controller of electromagnetic pressure cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620065798 CN200966549Y (en) | 2006-10-17 | 2006-10-17 | Computer controller of electromagnetic pressure cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200966549Y true CN200966549Y (en) | 2007-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620065798 Expired - Fee Related CN200966549Y (en) | 2006-10-17 | 2006-10-17 | Computer controller of electromagnetic pressure cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200966549Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103505057A (en) * | 2008-04-22 | 2014-01-15 | 雀巢产品技术援助有限公司 | Modular assembly of a beverage preparation machine |
| CN105698229A (en) * | 2014-11-28 | 2016-06-22 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker and control circuit thereof |
| CN107835536A (en) * | 2016-11-14 | 2018-03-23 | 宁波华宝食为天电器科技有限公司 | Electronic induction heated type pressure cooker circuit connection structure |
-
2006
- 2006-10-17 CN CN 200620065798 patent/CN200966549Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103505057A (en) * | 2008-04-22 | 2014-01-15 | 雀巢产品技术援助有限公司 | Modular assembly of a beverage preparation machine |
| CN105698229A (en) * | 2014-11-28 | 2016-06-22 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker and control circuit thereof |
| CN105698229B (en) * | 2014-11-28 | 2018-02-02 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooking pot and its control circuit |
| CN107835536A (en) * | 2016-11-14 | 2018-03-23 | 宁波华宝食为天电器科技有限公司 | Electronic induction heated type pressure cooker circuit connection structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |