Summary of the invention:
The present invention has absorbed the advantage of similar products at home and abroad, and the control core has adopted the very high single-chip microcomputer of the ratio of performance to price, and computer controller has perfect in shape and function, and antijamming capability is strong, and cost is lower.
The present invention includes the hardware and software part, hardware comprises: microcomputer controller, power circuit, reset circuit, button inputting circuits, clock circuit, temperature sensing circuit, display circuit, auditory tone cues electric circuit, output circuit.Power circuit is made up of protective tube FUSE, transformer TRAN, silicon bridge B1, diode D2, D3, D4, D10, capacitor C 3, C6, C7, C9, C8, C10, three terminal regulator 7805, and output connects microcomputer controller IC1 the 20th, the 1st pin; The elementary winding of the protective tube FUSE series transformer TRAN of power circuit connects power supply again, and the secondary winding of transformer TRAN connects the input end of silicon bridge B1; Silicon bridge B1 one output terminating diode D2 positive pole, diode D2 negative pole connects the input end (1) of three terminal regulator 7805; The earth terminal (2) of another output termination three terminal regulator 7805 of silicon bridge B1; The output terminal of three terminal regulator 7805 (3) connects the positive pole of diode D10, and the negative pole of diode D10 meets power supply V
DDCapacitor C 7, C9 are in parallel with the input end (1) and the earth terminal (2) of three terminal regulator 7805; Capacitor C 8, C10 are in parallel with negative pole and three terminal regulator 7805 earth terminals (2) of diode D10; Three terminal regulator 7805 output terminals (3) connect diode D3 positive pole in addition, and diode D3 connects with diode D4, and the negative pole of diode D4 connects the 13rd pin of microcomputer controller IC1; Capacitor C 3, C6 are in parallel with negative pole and three terminal regulator 7805 earth terminals (2) of diode D4; Reset circuit is made up of resistance R 1, R3, R5, R7, R8, R9, capacitor C1, C2, triode Q5, Q6, output connects the 7th pin of microcomputer controller IC1, the resistance R 8 of reset circuit and resistance R 5 series connection, one of resistance R 8 terminates to the tie point of silicon bridge B1 output terminal and diode D2 positive pole, and resistance R 8 is connected the base stage of triode Q5 with the contact of resistance R 5; Emitter and the ground connection of another termination triode Q5 of resistance R 5, capacitor C 1 is in parallel with resistance R 5; The also contact of collector connecting resistance R1, the R9 of triode Q5, emitter and the ground connection of another termination triode Q6 of resistance R 9; The base stage of another termination triode Q6 of resistance R 1, collector connecting resistance R7, R3 and the contact of triode Q6; The other end of resistance R 3 connects the emitter of triode Q5, and capacitor C 2 negative terminals connect triode Q5 emitter, receive the 7th pin of microcomputer controller IC1 behind the other end of capacitor C 2 positive terminating resistor R7 again; Button inputting circuits is made up of resistance R 12, R13, R14, R15, R16, R17, R18, R20, R21, R22, R23, R24, R25, R26, R34, touch-switch KG, K1, K2, K3, K4, K5, K6, K7, K8, its output is received the 18th pin, the 17th pin, the 16th pin, the 15th pin of microcomputer controller ICI respectively and is received the 19th pin of microcomputer controller ICI, the 5th pin, the 6th pin by resistance R 11, R19, R27; The end parallel connection of button inputting circuits resistance R 17, R18, R34, R25, R15R12, R14, R26, R24 is ground connection again, and the other end is connected with the end of each touch-switch K3, K2, K1, K8, K7, K6, K5, K4, KG respectively successively; Meet power supply V after resistance R 13, R16, R20, R21, R22, R23, the R36 one end parallel connection
DD, the other end of resistance R 13, R16, R20, R21, R22, R23, R36 joins with another non-earth terminal of touch-switch K7, K6, K5, K4, K3, K2, K1 respectively successively; Touch-switch K7 and the 15th pin of receiving microcomputer controller IC1 after the non-earth terminal of K8 is connected, the 16th pin of the non-ground connection termination microcomputer controller IC1 of touch-switch K6, the 17th pin of the non-ground connection termination microcomputer controller IC1 of touch-switch K5; Touch-switch K4 and the 18th pin that meets microcomputer controller IC1 after the non-earth terminal of KG is connected; Touch-switch K3, K2, the non-earth terminal of K1 respectively with the 6th pin, the 5th pin, the 19th pin of receiving microcomputer controller IC1 after resistance R 27, R19, R11 one end are connected again respectively; Clock circuit is made up of capacitor C 11, C12, quartz crystal JIN, the 1st, 2,3 pin of serial connection input microcomputer controller IC1; Temperature sensing circuit is made up of resistance R 6, sensor PT and capacitor C 4, and resistance R 6 is connected with sensor PT, and capacitor C 4 is in parallel with sensor PT, resistance R 6 and the output of sensor PT contact is connect the 14th pin of microcomputer controller IC1; Display circuit is made up of resistance R 10, R11, R19, R27, R28, R29, R30, R31, R32, R33, R35, LED 1, LED2, LED3, LED4, LED5, LED6, LED7, LED8, charactron LED, triode Q1, Q2, Q3, Q4, and the base stage of triode Q1, Q2, Q3 series resistor R10, R30, R31 is respectively received the 12nd pin, the 10th pin, the 9th pin of microcomputer controller IC1 again; LED is exported the 19th pin, the 5th pin, the 6th pin, the 14th pin, the 15th pin, the 16th pin, the 17th pin, the 18th pin that series resistor R11, R19, R27, R28, R29, R32, R33, R35 respectively meet microcomputer controller IC1; Auditory tone cues electric circuit is made up of resistance R 4, hummer BUZ polyphone, and resistance R 4 connects microcomputer controller IC1 the 8th pin; Output circuit is made up of resistance R 2, diode D1, triode Q7, relay R E, and triode Q7 base stage crosstalk resistance R2 connects microcomputer controller IC1 the 11st pin, the collector of diode D1 and a termination triode Q7 after relay R E is in parallel, one termination power+12V.The break-make of relay R E control heat-generating disc HEAT, the whole control process of Computerized controller for electric pressure cooker IC1 be according to the temperature detection amount to temperature control.In order to realize controlling pressure in the electric pressure cooking saucepan indirectly by the control temperature, utilization of the present invention has float-actuated valve on the pot cover of electric pressure cooking saucepan, when the electric pressure cooking saucepan internal gas pressure does not surpass local atmospheric pressure, float-actuated valve will lose heart, in float-actuated valve loses heart process with the transition that keeps one's end up, the temperature in the electric pressure cooking saucepan the bottom of a pan will be to keep very steady for some time, the boiling point (using code name Tg100) of water expression under the just local atmospheric pressure of the temperature that this process measurement arrives, when determining Tg100, adopt the unsteady determining method of boiling point to realize.When the air pressure in the pressure cooker surpasses local atmospheric pressure, pressure in the increment of cooking bottom temperature and the electric pressure cooking saucepan is proportional, and its corresponding relation is as shown in the formula: PT=5 * (Tg-Tg100), in the formula: when PT one cooking bottom temperature is Tg, air pressure in the electric pressure cooking saucepan pot, unit are kPa; Temperature at the bottom of the Tg-, unit is degree centigrade, the temperature in the bottom of a pan during water boiling in the local atmospheric pressure of Tg100-is cooked.Definite process of Tg100 is that the software programming formula by single-chip microcomputer realizes computing and control procedure.