CN2327290Y

CN2327290Y - Automatic pressure cooker

Info

Publication number: CN2327290Y
Application number: CN 98236413
Authority: CN
Inventors: 杨哲
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-06
Filing date: 1998-01-06
Publication date: 1999-07-07
Anticipated expiration: 2008-01-06

Abstract

The utility model relates to a multifunctional automatic pressure cooker which is controlled by a microcomputer and has the functions of time counting, timing, time delay, time display and automatic alarm. The multifunctional automatic pressure cooker is composed of a cooker body and an automatic control part, wherein the cooker body part mainly comprises a cooker body in a locking case shell and a cooker lid linked to the locking case shell as a whole; the external bottom of the locking case shell is provided with a chassis in which an electric hot tray is fixed; a cross beam is arranged on the top of the cooker; one end of the cross beam is connected with a rotary shaft on a pull rod, and the other end is connected with a cam on a draw hook; a bottom sealed pressure limiting valve is installed in the center of the cooker lid and extends out of the cross beam. The automatic control part adopts a single-chip computer PIC16C55 which automatically designs an automatic control program used for cooking and stewing different kinds of food according to different tastes. The utility model has the advantages of reasonable structure, attractive appearance, convenient and practical use, high safety and energy saving.

Description

Automatic pressure cooker

The utility model relates to a kind of by microcomputerized control, have timing, regularly, time-delay, time showing, the multi-functional full-automatic pressure cooker of reporting to the police automatically.

The pressure cooker of Xiao Shouing is still decades ago as usual in the market, O-ring seal is housed and by the serratd edge clamping, air bleeding valve is housed on the pot cover between pot cover and pot body, and the upper end of air bleeding valve is a hermetically-sealed construction, very easily stops up during use and causes danger.Though electric cooker development in recent years relatively rapidly, function is few with regard to its structure, seals bad and wastes energy, and can not adapt to the demand of people to high-quality life.

The purpose of this utility model is that to provide a kind of current collection pot for cooking rice and pressure cooker to people be one, by the Automatic pressure cooker of microcomputerized control.Convenient and swift, safe and reliable, satisfied people's demand.

The purpose of this utility model is achieved in that Automatic pressure cooker reaches automatic control two parts by the pot body and forms.The pot body portion mainly comprise by in the locking jacket the pot body and with locking jacket be the pot cover of one.Outer bottom at locking jacket is provided with the chassis, and the inside is fixed with electric hot tray, and the top of pot is provided with crossbeam, and an end of crossbeam connects by the rotating shaft that is positioned on the pull bar; The other end is connected with cam on the drag hook, and the pressure limiting valve that the bottom sealing is housed in the centre of pot cover also stretches out crossbeam, and locking jacket also is provided with housing outward.Automatically control section then adopts the PIC16C55 single-chip microcomputer that U.S. MAXIM company produces, and has designed automatic control program.Concrete structure and working procedure are: power supply of the present utility model has " thoroughly power down function ", and promptly after the overall process of finishing the work, Automatic pressure cooker thoroughly cuts off the power supply, and has so not only saved electric energy but also has guaranteed safety.Behind power connection, press power switch AN ₁, the power supply on of control section at this moment, relay indicating light is " time-delay " LED ₁State.Nixie display is 0: 00 state, can press AN as the needs delay working ₄When turning down, AN ₅, AN ₆Transfer and divide, maximum levelling amount is 9 hours 60 minutes.Can uncomfortable above-mentioned triple bond if do not need to delay time.Time-delay is shown as countdown.Press function selecting key AN ₇Can select to cook, cook fast, cook congee, fricassee, stew, stew fast, indicator lamp LED ₂-LED ₇Bright, press AN ₄-AN ₆, can align the working time, need can not move the time of aligning by the internal memory working time.Working time is a reverse countdown, after the course of work finishes, and indicator lamp LED ₂-LED ₇Go out.Select temperature retention time at last, press function selecting key AN ₇Make insulation indicator lamp LED ₈Bright, press AN ₄-AN ₆The levelling temperature retention time, temperature retention time is the longest to be 9 hours 60 minutes.As do not adjust temperature retention time so temperature retention time be 9 hours 60 minutes.Temperature retention time is shown as reverse countdown.Single-chip microcomputer sends alarm signal after finishing temperature retention time, thoroughly cuts off the electricity supply then and finishes entire work process.Function selecting key AN is pressed in the intact back of above selection of time ₇Make it to reach needed action LED ₂-LED ₇, click work/Pause key AN again ₃At this moment the beginning of working.In the bottom of a pan, the steam vent place of pot cover is equipped with a RTD respectively, this sensor can with temperature increase and resistance descend.Outage when cooking bottom temperature surpasses 103 ℃, when the pot cover exhaust reached 103 ℃, single-chip microcomputer picked up counting to drive and reports to the police, and the expression meal boils; When have a power failure, contact is bad, during the pressure sensor overpressure, all can cut off the power supply automatically and report to the police.On the resistance of its series connection, can obtain a temperature variant voltage variety, it is delivered to the positive input terminal of voltage comparator LM339.Compare with its negative input end, be lower than negative input end as the voltage of positive input terminal and be output as low level i.e. " 0 ", on the contrary for high level be " 1 ".The output of comparator is by the B mouth input of single-chip microcomputer.When being input as " 0 ", the A mouth then is output as " 1 " according to program and connects heater by relay.When being input as " 1 ", the A mouth is " 0 " then relay outage, and heater is disconnected.Also have a pressure sensor to be positioned on the pot cover the synthermal sensor of its operation principle in addition.When pot inner pressure during greater than 1.8 atmospheric pressure, comparator is output as " 1 ", the heater outage.Can press AN at any time in the course of the work ₃Break-off, the modification state is perhaps pressed power remove key AN ₂Thoroughly outage.

During operation, put into locking jacket, cover pot cover, the pot body and the pot cover that are placed with O-ring seal are compressed, press power switch and connect power supply, put function key as required and get final product with hook with the pot body for the treatment of cooking food is housed.The thing that the pressure limiting valve of bottom sealing will enter in the valve is directly discharged, and has guaranteed safety.

The utility model is owing to adopted up-to-date design philosophy, pot body and pot cover are locked by locking jacket, and the pressure limiting valve that the bottom sealing is housed is guaranteed safe and reliable, that its pot body has attractive appearance is generous, easy to operate,, energy savings, have timing, time-delay, regularly, time showing, the multiple function of reporting to the police automatically, can satisfy the demand of different user to high-quality life.

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

Fig. 1 is the utility model locking state schematic diagram.

Fig. 2 is the utility model relaxation state schematic diagram.

Fig. 3 is the block diagram of the automatic control section of the utility model.

Fig. 4 is the circuit theory diagrams of the automatic control section of the utility model.

Fig. 5 is the circuit theory diagrams of the utility model power unit.

Fig. 1-the 5th, specific embodiment of the utility model.

With reference to Fig. 1,2, the pot body portion mainly comprises by the pot cover 10 that pot body 8 reaches and locking jacket is connected as a single entity in the locking jacket 12, outer bottom at locking jacket 12 is provided with chassis 6, the inside is fixed with electric hot tray 5 by rivet 4, the top of pot is provided with crossbeam 11, and an end of crossbeam 11 connects by the rotating shaft that is positioned on the pull bar 7; The other end is connected with the cam that hook is fixed on the cam lever 2 on 3, and the pressure limiting valve 1 that the bottom sealing is housed in the centre of pot cover 10 also stretches out crossbeam 11, and pot cover 10 is equipped with cushion rubber 9 with pot 8 of bodies, and housings also are housed outside the locking jacket 12.

With reference to Fig. 3, by temperature sensor 1,2 and pressure sensor 3 temperature sensors or pressure, when magnitude of voltage surpassed the voltage of negative input end of comparator LM339, the A mouth output high potential of single-chip microcomputer drove BG ₁, BG ₂, BG ₃, by adjusting AN ₃, AN ₄, AN ₅, AN ₅, AN ₇The time, the driver connected CD4511 3 of single-chip microcomputer C mouth, the C mouth also meets LED when connecting 3 bit digital time showings ₁-LED ₈

With reference to Fig. 4, positive input terminal 5,7,9 pin of voltage comparator LM339, by PIN2 socket difference jointing temp sensor 1, temperature sensor 2 and pressure sensor 3, negative input end 4,6,8 pin of voltage comparator meet adjustable resistance R1, R2, R3 gets comparative voltage, voltage comparator output 1,2,3 pin meet single-chip microcomputer 15,16,17 pin, key switch S ₁-S ₅Connect single-chip microcomputer 10,11,12,13,14 pin, single-chip microcomputer 26,27 pin are the crystal oscillator interface, meet 4M crystal and electric capacity 1C ₁, 1C ₂, 1,2,3 pin of 1 minute timer CD4541 are the RC oscillator, resistance, electric capacity input meet R10, C3, R11 respectively, 5,7,9,10 pin ground connection, 12,13,14 pin meet power supply 5V, and 6,8 pin connect single-chip microcomputer 7,1 pin respectively, and 6,9,7 pin of single-chip microcomputer are driving N 2, N3, N1 respectively; 18,19,20,21 pin meet P2, P3, P4 respectively, and 7,1,2,6 pin of CD4511 drive charactron by output 9,10,11,12,13,14,15 pin of CD4511, and 22,23,24,25 pin of single-chip microcomputer and preceding four pin drive the D0-D7 luminous tube.

With reference to Fig. 5, power supply 220V input is by normally open push button switch AN ₁, and AN ₁ Relay J 2 normally opened contact J2-1 in parallel connect the elementary of power transformer B, power input also is connected with heater with the normally opened contact J1-1 of relay J 1, and transformer secondary output output 12V alternating voltage is formed rectifying and wave-filtering by rectifier D1-D4 and C1 and become direct current for transistor BG ₁, BG ₂, BG ₃In the time of work, through circuit of three-terminal voltage-stabilizing integrated LM7305, C2 filtering, output+5V is for control circuit work.

Claims

1, a kind of Automatic pressure cooker, the rivet (4) that comprises a pot body (8), cushion rubber (9) and fixed underpan (6), it is characterized in that: Automatic pressure cooker mainly is made up of pot body and automatic control section two parts, the pot body portion mainly comprises by the pot cover (10) that pot body (8) reaches and locking jacket is connected as a single entity in the locking jacket (12), outer bottom at locking jacket (12) is provided with chassis (6), the inside is fixed with electric hot tray (5) by rivet (4), the top of pot is provided with crossbeam (11), and an end of crossbeam (11) connects by the rotating shaft that is positioned on the pull bar (7); The cam that is fixed on the cam lever (2) on the other end and the hook (3) is connected, pressure limiting valve (1) is housed in the centre of pot cover (10) and stretches out crossbeam (11), between pot cover (10) and pot body (8) cushion rubber (9) is housed, the outer housing that also is equipped with of locking jacket (12), automatically the power supply of control section adopts thoroughly outage power supply, and power supply 220V input is by normally open push button switch AN ₁, and AN ₁Relay J 2 normally opened contact J2-1 in parallel connect the elementary of power transformer B, power input also is connected with heater with the normally opened contact J1-1 of relay J 1, and transformer secondary output output 12V alternating voltage is formed rectifying and wave-filtering by rectifier D1-D4 and C1 and become direct current for transistor BG ₁, BG ₂, BG ₃, by temperature sensor 1,2 and pressure sensor 3 temperature sensors or pressure, when magnitude of voltage surpassed the voltage of negative input end of comparator LM339, the A mouth output high potential of single-chip microcomputer drove BG ₁, BG ₂, BG ₃, by adjusting AN ₃, AN ₄, AN ₅, AN ₆, AN ₇The time, the driver connected CD4511 3 of single-chip microcomputer C mouth, the C mouth also meets LED when connecting 3 bit digital time showings ₁-LED ₈Positive input terminal 5,7,9 pin of voltage comparator LM339, by PIN2 socket difference jointing temp sensor 1, temperature sensor 2 and pressure sensor 3, negative input end 4,6,8 pin of voltage comparator meet adjustable resistance R1, R2, R3 gets comparative voltage, voltage comparator output 1,2,3 pin meet single-chip microcomputer 15,16,17 pin, key switch S ₁-S ₅Connect single-chip microcomputer 10,11,12,13,14 pin, single-chip microcomputer 26,27 pin are the crystal oscillator interface, meet 4M crystal and electric capacity 1C ₁, 1C ₂1,2,3 pin of 1 minute timer CD4541 are the RC oscillator, resistance, electric capacity input meet R10, C3, R11 respectively, 5,7,9,10 pin ground connection, 12,13,14 pin ground connection, 12,13,14 pin connect power supply 5,6,8 pin and connect single-chip microcomputer 7,1 pin respectively, and 6,9,7 pin of single-chip microcomputer are driving N 2, N3, N1 respectively; 18,19,20,21 pin meet P2, P3, P4 respectively, and 7,1,2,6 pin of CD4511 drive charactron by output 9,10,11,12,13,14,15 pin of CD4511, and 22,23,24,25 pin of single-chip microcomputer and preceding four pin drive the D0-D7 luminous tube.

2, Automatic pressure cooker according to claim 1 is characterized in that: the sealing of pressure limiting valve (1) bottom.