CN101290512A - Buffet furnace automatic turnover control device - Google Patents

Buffet furnace automatic turnover control device Download PDF

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Publication number
CN101290512A
CN101290512A CNA2008100616395A CN200810061639A CN101290512A CN 101290512 A CN101290512 A CN 101290512A CN A2008100616395 A CNA2008100616395 A CN A2008100616395A CN 200810061639 A CN200810061639 A CN 200810061639A CN 101290512 A CN101290512 A CN 101290512A
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China
Prior art keywords
circuit
resistance
control device
infrared
automatic turnover
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CNA2008100616395A
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CN101290512B (en
Inventor
吴平
陈聪祥
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Nanyang Hotel Articles Manufacturing Co Ltd Ningbo
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Nanyang Hotel Articles Manufacturing Co Ltd Ningbo
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Priority to CN2008100616395A priority Critical patent/CN101290512B/en
Publication of CN101290512A publication Critical patent/CN101290512A/en
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Publication of CN101290512B publication Critical patent/CN101290512B/en
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Abstract

The invention relates to an automatic cover turnover control device of a buffet stove, comprising a motor and a gearbox thereof which are arranged outside a stove body and an automatic cover turnover control device which is arranged on a front panel of the stove body, wherein, the automatic cover turnover control device consists of a microcomputer control circuit MCU, an infrared detection circuit, a temperature control circuit, a key-press detection circuit, a motor drive and detection circuit and a power circuit; the infrared detection circuit, the temperature control circuit and the key-press detection circuit are respectively connected to an input end of the microcomputer control circuit MCU; and the motor drive and detection circuit are connected to an output end of the microcomputer control circuit MCU, thereby forming a non-contact automatic cover turnover controller of an automatic buffet stove; when an infrared receiver senses that diners walk up to the buffet stove, the microcomputer controls the motor to drive the circuits to work and the stove cover is automatically opened; when the diners take away the food, the infrared receiver has no signal, the microcomputer controls the motor to operate to close the stove cover, thereby achieving opening and closing automation of the stove cover and solving the problems of heat preservation, cleanness and sanitation of the buffet stove.

Description

Buffet furnace automatic turnover control device
Technical field
The present invention relates to a kind of buffet furnace, particularly about the automatic turnover control device of buffet furnace.
Background technology
The buffet furnace of cafeteria's use at present, its swivelling cover all is that the diner holds and covers handle and open or close, owing to when the eater walks close to buffet furnace, held other food tray in its hand, needed to remove to open bell with an one hand, thereby to the diner make troubles and inconvenience, the eater who has often shuts bell because of being inconvenient to forget after taking food away, make off, thereby food can not be incubated and contaminated easily, exist not meet the hidden danger that sanitation and hygiene require.For a change this situation designs a kind of automatic turnover control device and pursues high-grade fashion needs to adapt to scientific-technical progress and people's living standard.
Summary of the invention
The technical problem to be solved in the present invention is, designs a kind of buffet furnace, have a dinner the people near the time just open the automaton of bell automatically just when leaving away automatically.
The present invention realizes above-mentioned purpose with following technical proposals.
Buffet furnace automatic turnover control device, it comprises motor and the variator thereof that is located at the body of heater outside, be located at the automatic cover-turning controller on the body of heater front panel, it is characterized in that the automatic cover-turning controller is made up of with testing circuit and power circuit micro computer MCU control circuit, infrared circuit, temperature control circuit, key press detecting circuit, direct motor drive, infrared circuit, temperature control circuit and key press detecting circuit are connected on the input end of micro computer MCU control circuit respectively, and direct motor drive and testing circuit are connected to the output terminal of micro computer MCU control circuit.
Described infrared circuit comprises infrared transmitter and circuit thereof, infrared receiver and circuit thereof, they go to control motor drive circuit work by micro computer MCU control circuit output signal after being defeated by micro computer MCU control circuit signal, form a kind of contactless self-action meal furnace automatic turnover controller, before the personnel of having dinner walk close to buffet furnace, the infrared receiver perception, bell is opened in the work of micro computer MCU control motor drive circuit automatically; When the people that has dinner takes food away and leaves, the infrared receiver no signal, bell is closed in the work of micro computer MCU control motor, thereby realizes that bell opens and closes robotization, has solved the insulation that buffet furnace exists, the problem of sanitation and hygiene.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is control panel function setting figure.
Fig. 3 and Fig. 4 are for implementing circuit diagram.
Wherein Fig. 3～1 is a micro computer MCU control circuit.
Fig. 3～2 are to power supply and motor-driven plate.
Fig. 3～3 are infrared receiving circuit.
Fig. 3～4 are the infrared emission circuit.
Fig. 3～5 are temperature display circuit.
Fig. 3～6 are provided with circuit for button.
Fig. 3～7 are the keyboard back light driving circuit.
Fig. 4～1 is the 24V switching power circuit.
Fig. 4～2 are temperature sensing circuit.
Fig. 4～3 are zero cross detection circuit.
Fig. 4～4 are temperature-control circuit.
Fig. 4～5 are motor-driven and testing circuit.
Fig. 5 is the automatic cover-turning control flow chart.
Fig. 6 is the keyboard scan program flow diagram.
Fig. 7 is the program flow diagram of uncapping.
Fig. 8 covers program flow diagram for closing.
Fig. 9 is the automatically opening and closing program flow diagram.
Embodiment
Enforcement circuit of the present invention as shown in Figure 1, Figure 2, Figure 3 and Figure 4.
Microcomputer control circuit 3 referring to Fig. 3～1, is made up of with peripheral resistance R 11, capacitor C 1～C4 and electrochemical capacitor E2, E3 and crystal oscillator Y1 the MCU chip.The MCU chip selects for use ATMGA8L-8P1 to implement.
Infrared circuit 1 comprises infrared transmitter 10 and circuit and infrared remote receiver 11 and circuit thereof.
Infrared emission circuit 10 is made up of resistance R 1 and power valve U2.Infrared receiving circuit 11 is made up of electrochemical capacitor E1 and receiving tube U1.
Infrared transmitting tube U2 is under the current-limiting resistance protection; all the time launch a succession of pulse signal, unmanned near the time U1 can not get the infrared external reflection signal, the reflex of man-hour human body is arranged; obtain corresponding pulse signal at U1, by inserting the RSV pin input microcomputer controller of MCU.
Key press detecting circuit 2 referring to Fig. 3～6, is made up of resistance R 13～R16 and button S1, S2, S3, and button is located on the panel 8, inserts the KEY1 pin input microcomputer controller of MCU respectively with button 9,12,14 expression S1, S2, S3.Wherein resistance R 13 is formed different bleeder circuits with resistance R 14, R15, R16 respectively, the partial pressure value difference of the button correspondence of diverse location, thereby obtain different voltage division signal, button S1 and resistance R 13 and R15 form setting key, are used for design temperature control or by key control.Button S2 and resistance R 13 and R16 are used for closing lid or temperature decline control, and button S3 and resistance R 13 and R14 are used to uncap or temperature rising control signal input micro computer MCU implements control.
Keyboard back light driving circuit 4 is referring to Fig. 3～7, by triode Q3, LED 1～LED6, resistance R 12 and R17 form, and triode Q3 is a switching tube, and resistance R 12 and R17 are current-limiting resistance, by the LED pin of resistance R 12 access MCU, the back Q3 conducting that powers on makes LED1～LED6 luminous.
Direct motor drive control and testing circuit 5 referring to Fig. 4～6, are formed the inductance absorption circuit by rectifier bridge DB1.Form the on-off circuit that the control motor is just changeing by triode Q4, resistance R 26, relay U5, diode D13, the on-off circuit of forming the counter-rotating of control motor by triode Q4, resistance R 25, relay U6, diode D14, the RL1 foot control system motor that inserts the MCU micro computer by resistance R 26 just changes, and inserts the RL2 foot control system motor counter-rotating work of micro computer MCU by resistance R 25.The circulation road that continues of forming two-way inductance absorption circuit inverse electromotive force when motor cuts out by electric bridge heap DB1.Form the sample circuit that detects electric machine operation state by triode Q6, resistance R 27, R28, capacitor C 13, resistance R 27 is connected in parallel between the collector and emitter of triode Q6, and capacitor C 13 an end ground connection in parallel with resistance is formed AD-A and is terminated at micro computer MCU input detection signal.Insert the SW pin of MCU by triode Q6 and input resistance R28 and form the pulse-width signal input, receive the modulation signal that MCU sends.
When the RL1 of micro computer MCU or RL2 no signal, the voltage of motor two ends equates to be VDD, and no-voltage does not rotate.When the RL1 of micro computer MCU and SW pin output high level, relay U5 closure, motor two ends have direct current 24V motor just to change.Produce the stall situation that a voltage drop is used to detect motor simultaneously on resistance R 27, wherein the pulse signal of SW input is used to regulate motor-driven speed.With should EL2 and SW U6 closure when being high level, motor two end direct current 24V make the motor counter-rotating, simultaneously also by the resistance R 27 whether stall of voltage drop detection circuit that powers on, if stall stall immediately.
Temperature control circuit 6 comprises temperature sensing circuit, temperature-control circuit, zero cross detection circuit and temperature display circuit.Temperature sensing circuit referring to Fig. 4～2, is made up of resistance R 17, R18 and capacitor C 10, R17 and R18 are connected into bleeder circuit, the resistance of R17 also changes when dut temperature changes, and dividing potential drop side voltage is also along with variation, and the TEMP pin of input MCU obtains to protect temperature value through the A/D computing.
Temperature-control circuit, referring to Fig. 4～4, by resistance R 21～R24, capacitor C 14, optocoupler spare U4, bidirectional triode thyristor Q7 and heater element H1 form.Zero cross detection circuit referring to Fig. 4～3, is made up of diode D12, optocoupler spare U2, resistance R 19, R20.Temperature display circuit is made up of triode Q1 and Q2, resistance R 2～R8, the digital display tube DS1 of semiconductor.Referring to Fig. 2 and Fig. 3～5, triode Q1 wherein and the input end of Q2 are connected to the D1G1 of micro computer MCU or D1G2 pin respectively, digital display tube 13 shows relevant temperature, obtain the zero cross signal of city's alternating current by zero cross detection circuit, so that the change of the bidirectional triode thyristor Q7 conduction angle in the control circuit, and reach A.T.C.The artificial temperature of regulating is adjusted temperature required by button S1 and adjusting button S2 or S3 are set.
Power circuit 7 comprises 24V switching power circuit, three-terminal voltage-stabilizing circuit and power indicating circuit.
The 24V switching power circuit, referring to Fig. 4～1, by transformer T1, inductance L 1, L2, capacitor C 1～C9, electrochemical capacitor E1～E5, resistance R 1～R16, diode D1～D10, triode Q1～Q3 adjusts pipe Z1 and optocoupler spare U1 and forms.Switching Power Supply is transformed into city's alternating current+the 24V direct current, drives with dc motor.The three-terminal voltage-stabilizing circuit, referring to Fig. 4～4, by voltage stabilizing chip U3, capacitor C 11, C12, electrochemical capacitor E6～E7 forms, for micro computer MCU provides+the 5V working power.Power indicating circuit is made up of resistance R 16 and light emitting diode D10, (figure does not draw).
Switching Power Supply mainly plays the pressure-stabilizing constant flow effect, AC power via R1, C1, L1 step-down rectifier after, drive vibration by field effect Q3 and triode Q1, Q2, become to exchange and be coupled to L2, E4, E5 and D9, C8 composition secondary rectifying and wave-filtering, make power supply by Vdd end output+24 pressure-stabilizing constant flow power supply machine driving circuits and three-terminal voltage-stabilizing circuit through transformer T1.The feedback sample circuit is at the secondary sample end of switching power circuit, by resistance R 2, R6 dividing potential drop, resistance R 6, capacitor C 2 and stabilivolt Z1 provide reference voltage, to stop voltage jump, be not subjected to external interference, be incorporated into T1 through photoelectricity coupling U1 again and import the secondary rectifying and wave-filtering once more, reach the interference that pressure-stabilizing constant flow is not subjected to the external voltage fluctuation to guarantee Vdd output+24V power supply.
After the device power, no matter how extraneous input ac voltage fluctuates, and switching power circuit 7 can both be stablized the DC voltage of output+24V, power supply stream machine operation, and three-terminal voltage-stabilizing power supply output+5V is for micro computer MCU working power.Temperature sensing circuit perception meal furnace bottom real time temperature is shown in real time by display circuit.Zero cross detection circuit and temperature-control circuit are by micro computer MCU instruction control.The steering order of micro computer has programming software and button to be provided with respectively to finish.Three operating key S1, S2, S3 are respectively key 9 are set, close and cover key 12 and the key 14 of uncapping in the circuit, comprise the angle setting of uncapping, the setting of automatic or manual switch cover, heating is provided with etc.
The work of infrared detection and motor drive circuit is by the programming software control of micro computer MCU, programming Control software comprises automatic cover-turning control program, keyboard scan program, and the program of uncapping is closed the program of covering, automatically opening and closing programs etc. are sketched control procedure below in conjunction with accompanying drawing 2 and Fig. 5～Fig. 9.
The automatic cover-turning control program, as follows referring to step shown in Figure 5, the micro computer test initialization 501 that powers on, determine PWM parameter 502, infrared transmitter 10 emission infrared rays 503 on the control panel 8, keyboard on the control panel 8 is carried out scanning sequence 504, infrared remote receiver 11 on the control panel 8 is received human body infrared signal 505, and whether micro computer MCU carries out pattern and judges, be automatic lid closing/opening state 506, if, operation automatically opening and closing program 507 returns 503, if not then, operation hand switch lid program 508 turns back to 503 then.
Fig. 6 is the uncap key 12 of micro computer MCU to control panel 8, closes cover key 14 and carry out scanning sequence control, at first judges the whether closure 602 of key 12 of uncapping, if then carry out the program 603 of uncapping, if not, judge to close then whether closed cover key 14 604, if carry out the pass and cover program 605, if not, judge to close and whether cover key 14 closures, if carry out adaptive setting program 607 above 15 seconds, if not, return 602 programs.Also have another program is to judge directly whether switch key surpasses 4 seconds simultaneously, if, carry out automatically and manual mode is changed mutually, if not, return 602 programs.
Fig. 7 and Fig. 8 are just changeing when uncapping for the microcomputerized control motor, and the program of counter-rotating when closing is at first judged whether stall 705 of motor in Fig. 7 program, if not, then judge and whether uncap the time, if to the time to 706, motor stall 708 if not, is returned and is detected load size 703.Fig. 8 is that control is closed and to be covered program and no longer repeat.
Fig. 9 full-automatic switch lid process flow diagram, the infrared detector 10,12 on the control panel judges in operate as normal whether infrared receiver 12 receives infrared signal 902, if receive, judges then whether lid is closing 903, if carry out the program 904 of uncapping; If confiscate infrared signal, whether judged for 6 seconds again to 906, if to 6 seconds, judge then whether lid is opening 907, if then carry out pass program 908; If do not arrive for 6 seconds, lid is not opened all return informations 902.

Claims (9)

1, a kind of buffet furnace automatic turnover control device, it comprises motor and the variator thereof that is located at the body of heater outside, be located at the automatic cover-turning controller on the body of heater front panel, it is characterized in that the automatic cover-turning controller is by micro computer MCU control circuit (3), infrared circuit (1), temperature control circuit (6), key press detecting circuit (2), direct motor drive and testing circuit (5) and power circuit (7) are formed, infrared circuit, temperature control circuit and key press detecting circuit are connected on the input end of micro computer MCU control circuit respectively, and direct motor drive and testing circuit are connected to the output terminal of micro computer MCU control circuit.
2, buffet furnace automatic turnover control device according to claim 1 is characterized in that infrared circuit (1) comprises infrared transmitter (10) and circuit thereof, infrared remote receiver (11) and circuit thereof; Infrared transmitter (10) and infrared remote receiver (11) are located at respectively in the control panel (8).
3, buffet furnace automatic turnover control device according to claim 1 is characterized in that motor drive circuit (5) comprises the on-off circuit of diode rectification bridge circuit DB1, symmetry and the sample circuit of detection electric machine operation state.
4, buffet furnace automatic turnover control device according to claim 3 is characterized in that described symmetrical switch circuit forms the on-off circuit that just changeing of control motor by triode Q4, resistance R 26, relay U5, diode D13; The on-off circuit of forming the counter-rotating of control motor by triode Q4, resistance R 25, relay U6, diode D14.
5, buffet furnace automatic turnover control device according to claim 3, the sample circuit that it is characterized in that described detection electric machine operation state is by triode Q6, resistance R 27, R28, capacitor C 13 is formed, resistance R 27 is connected in parallel between the collector and emitter of triode Q6, capacitor C 13 and resistance R 27 ground connection in parallel, the AD-A pin input detection signal of AD-A termination MCU, resistance R 28 are connected on the SW pin input pulse-width signal of the base stage access MCU of triode Q6.
6, buffet furnace automatic turnover control device according to claim 1 is characterized in that temperature control circuit (6) comprises temperature sensing circuit, temperature-control circuit, zero cross detection circuit and temperature display circuit.
7, buffet furnace automatic turnover control device according to claim 1 is characterized in that power circuit (7) comprises switching power circuit, three-terminal voltage-stabilizing circuit and power indicating circuit.
8, buffet furnace automatic turnover control device according to claim 7, the feedback sample circuit that it is characterized in that switching power circuit is by the resistance R 2 of secondary sample end and the dividing potential drop of R6, and resistance R 6 and capacitor C 2 filtering provide reference potential through the voltage stabilizing of stabilivolt Z1.
9, buffet furnace automatic turnover control device according to claim 1 is characterized in that establishing on the body of heater front panel (8) the keyboard back light driving circuit of being made up of LED 1～LED7, resistance R 12, R17 (4).
CN2008100616395A 2008-05-22 2008-05-22 Buffet furnace automatic turnover control device Expired - Fee Related CN101290512B (en)

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Application Number Priority Date Filing Date Title
CN2008100616395A CN101290512B (en) 2008-05-22 2008-05-22 Buffet furnace automatic turnover control device

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Application Number Priority Date Filing Date Title
CN2008100616395A CN101290512B (en) 2008-05-22 2008-05-22 Buffet furnace automatic turnover control device

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CN101290512A true CN101290512A (en) 2008-10-22
CN101290512B CN101290512B (en) 2011-01-12

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101997477A (en) * 2009-08-17 2011-03-30 樱花卫厨（中国）股份有限公司 PWM pulse regulating circuit for motor of range hood
CN105639960A (en) * 2014-11-11 2016-06-08 沈阳新松机器人自动化股份有限公司 Mess tin capable of being opened and closed automatically
CN106378785A (en) * 2016-11-30 2017-02-08 苏州阿西机器人有限公司 Intelligent meal delivery robot
CN107865682A (en) * 2017-12-06 2018-04-03 深圳市鹏力凯科技有限公司 The Porta blocking-up device of remote control
CN108888122A (en) * 2018-07-02 2018-11-27 珠海格力电器股份有限公司 Intelligent rice spoon, cooking utensil and control method for opening and closing cover of cooking utensil
CN108903669A (en) * 2018-07-02 2018-11-30 珠海格力电器股份有限公司 Cooking utensil and cover opening and closing control method thereof
CN110545054A (en) * 2019-08-10 2019-12-06 中山华帝电子科技有限公司 Circuit for controlling synchronous motor by relay
CN110604456A (en) * 2018-06-15 2019-12-24 佛山市顺德区美的电热电器制造有限公司 Control method of cooking equipment, cooking detection equipment and cooking equipment
CN114206176A (en) * 2019-08-08 2022-03-18 百事可乐公司 System and method for operating a heating element of an appliance

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CN104665736A (en) * 2015-03-02 2015-06-03 佛山市顺德区美的洗涤电器制造有限公司 Dish washing machine and machine door opening protection method and device thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101997477A (en) * 2009-08-17 2011-03-30 樱花卫厨（中国）股份有限公司 PWM pulse regulating circuit for motor of range hood
CN105639960A (en) * 2014-11-11 2016-06-08 沈阳新松机器人自动化股份有限公司 Mess tin capable of being opened and closed automatically
CN105639960B (en) * 2014-11-11 2017-07-07 沈阳新松机器人自动化股份有限公司 Automatic switch cutlery box
CN106378785A (en) * 2016-11-30 2017-02-08 苏州阿西机器人有限公司 Intelligent meal delivery robot
CN107865682A (en) * 2017-12-06 2018-04-03 深圳市鹏力凯科技有限公司 The Porta blocking-up device of remote control
CN110604456A (en) * 2018-06-15 2019-12-24 佛山市顺德区美的电热电器制造有限公司 Control method of cooking equipment, cooking detection equipment and cooking equipment
CN110604456B (en) * 2018-06-15 2022-05-20 佛山市顺德区美的电热电器制造有限公司 Control method of cooking equipment, cooking detection equipment and cooking equipment
CN108903669A (en) * 2018-07-02 2018-11-30 珠海格力电器股份有限公司 Cooking utensil and cover opening and closing control method thereof
CN108903669B (en) * 2018-07-02 2020-09-29 珠海格力电器股份有限公司 Cooking utensil and cover opening and closing control method thereof
CN108888122A (en) * 2018-07-02 2018-11-27 珠海格力电器股份有限公司 Intelligent rice spoon, cooking utensil and control method for opening and closing cover of cooking utensil
CN114206176A (en) * 2019-08-08 2022-03-18 百事可乐公司 System and method for operating a heating element of an appliance
CN114206176B (en) * 2019-08-08 2024-05-24 百事可乐公司 System and method for operating a heating element of an appliance
CN110545054A (en) * 2019-08-10 2019-12-06 中山华帝电子科技有限公司 Circuit for controlling synchronous motor by relay

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