CN1875827A

CN1875827A - High-efficiency energy-saving steam and boil dual-purpose electric pressure cooker

Info

Publication number: CN1875827A
Application number: CN 200510078455
Authority: CN
Inventors: 吴子波
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-11
Filing date: 2005-06-11
Publication date: 2006-12-13

Abstract

The invention discloses a high-effective energy-saving boiling high-pressure electric cooker, which is characterized by the following: the magnetic specific limit valve is set on the top of cooker; when the water in the cooker is boiling, the high-pressure steam bursts to rotate the limit valve; the electromagnetic inductive coil or Hall element is assembled on the insulating case of cooker besides the limit value, whose inductive electric pulse adjusts firepower of electric thermal disc automatically through control circuit. The invention is fit for cooking rice, steamed bread and steamed stuffed bun, which can be controlled remotely and automatically.

Description

High-efficiency energy-saving steam and boil dual-purpose electric pressure cooker

Background technology

Though the automaticity that the present electric rice pressure cooker that uses is cooked is very high, but because take to hold one's breath fully in the process of cooking, stewing mode of boiling is so cause the overlong time of cooking, and can not be used for automatic steamed sweet bun, steamed stuffed bun, so to the north regional lack scope for their abilities based on wheaten food.

Affiliated technical field

The invention discloses a kind of steam and boil dual-purpose electric pressure cooker that is common on both sides of the Changjiang River, the rice that cooks is compared more fragrant, good to eat with common pressure cooker, and can realize automatic steamed sweet bun, steamed stuffed bun or other food.In digestion process, because the amount of releasing of steam can be controlled very for a short time automatically, thereby can save a large amount of energy resource consumptions, except all automatic functions with common electric rice pressure cooker, it also has the speed of cooking than common pressure cooker fast 2 times, the advantage that the steamed wheaten foods thing is faster 3 times than ordinary pan.

Summary of the invention

The purpose of this invention is to provide a kind of all automation functions with electric rice pressure cooker, and it is fast to have the speed of cooking simultaneously, with minimum energy resource consumption, realize the steam and boil dual-purpose electric pressure cooker of automation steamed wheaten foods thing quickly and efficiently, make it to be common on both sides of the Changjiang River cooking rice and steaming wheaten food.

Technical scheme of the present invention is: (see figure 1) is boiled common electric rice pressure cooker stewing fully and is changed that to be similar to common pressure cooker such into, allows steam release and realize steaming and boiling from the pressure limiting valve trace.Pincers advances two or four small magnets symmetrically on the aluminum pressure limiting valve, perhaps iron pressure limiting valve is magnetized to magnet, vortex shape is made in the duct of giving vent to anger all around, it is rotated, on the electric cooker insulation outer cover (7) on special pressure limiting valve (1) next door, electromagnetic induction coil or Hall element (2) are installed.When steam is gone out when pressure limiting valve is rotated, induction coil or Hall element are owing to the power variation in magnetic field produces faint induction alternating voltage, its frequency and spoke degree are directly proportional with the rotary speed of pressure limiting valve, and the rotary speed of pressure limiting valve follows the amount of releasing of steam to be directly proportional.The induction alternating voltage that this is faint through the control circuit (3) in the bottom of a pan amplify, after the shaping, digitized processing, the control voltage that forms with it removes to adjust fire regulation (Fig. 2) again, make the mean power of electric hot tray (4) that corresponding the variation be taken place, thereby make firepower maintain a suitable value, the steam that releases from pressure limiting valve is maintained on the artificial suitable amount of setting, so just can save the energy effectively, and shorten a large amount of digestion times.After boiling was finished, (Fig. 3) cut off main heater circuit automatically by the timer that boils, and entered 70 ℃ holding stage.

The present invention has following beneficial effect: the speed of 1, cooking is boiled fast 2 times of electric cooker than common high pressure is stewing, and cooking quality is more not inferior than it; 2, can be rapidly and efficiently steamed wheaten foods thing automatically, and save a large amount of energy, be applicable to northern area steamed sweet bun steamed stuffed bun based on wheaten food; 3, the control that the steam amount of releasing can be artificial, adjust its size, be stabilized on the value.4, all automation functions that possess common electric rice pressure cooker as Remote, are started working etc. by the time of setting.

The specific embodiment

The structure of special pressure limiting valve and electromagnetic induction coil or Hall element is described with acting in the technical scheme, and structure and the effect and the implementation process of control circuit mainly is described below:

Embodiment 1:(sees Fig. 5) output signal of electromagnetic induction coil (contain strengthen induction iron core) or Hall element is electrically connected with the control circuit in the bottom of a pan by the lead that is embedded in the electric cooker plastic casing, control circuit is by amplification shaping device (11), pulse counter (15), digital to analog converter (16), (14) four unit of Schmidt's voltage comparator are formed, Schmidt's comparator output terminal (its output voltage also outputs to the start end B of the timer that boils (Fig. 3) simultaneously, just starts regularly when having steam to release in the pot to guarantee to make) is electrically connected with fire regulation (Fig. 2).By the faint alternating current pulse that electromagnetic induction coil obtains, by the pulse amplification shaping device, amplify shaping and become the identical positive polarity rectangular pulse signal of spoke degree, pulse signal enters pulse counter and counts, and refreshes once every 2 seconds, again counting.Before refreshing at every turn, arrival along with the periodic refreshing pulse, the DC voltage that digital to analog converter, digital to analog converter are converted to count value correspondence is transported in the count value locking, transport to the normal phase input end of Schmidt's voltage comparator, the reference voltage of its inverting input is by the several buttons artificial setting by the kind of individual hobby and cooking that is installed on the electric cooker control panel (5); Mean then that the steam amount of releasing is excessive and need to reduce firepower when the DC voltage of counter output is higher than reference voltage.So comparator output positive voltage, this positive voltage acts on fire regulation, makes the outage of electric hot tray primary heater, and firepower reduces gradually, and pressure cooker body (6) heat absorption reduces.Otherwise, comparator output no-voltage, the primary heater energising increases firepower, and the pressure cooker body heat absorption increases.If the DC voltage of counter output is near reference voltage, then the comparator output voltage is safeguarded previous status, to reduce frequent power on/off.

Embodiment 2:(sees Fig. 4) belong to digital circuit because of counter and digital to analog converter, be subject to external interference, and price is also higher, also can use pulse width normalizing device (12), pulse rectifier (13) is corresponding DC voltage with the frequency size conversion of pulse, replace aforementioned both function, but control accuracy may differ from.

Embodiment 3:, also can use a single-chip microcomputer to realize the function of The whole control circuit because of the price of single-chip microcomputer descends day by day.

Pulse amplification shaping device in above-mentioned three kinds of embodiments is made of an operational amplifier and a Schmidt trigger, and pulse counter is made of one four digit counter and refresh timer and digital phase-locking storage.Digital to analog converter is made of four D/A converters, and output voltage is divided into 16 grades.Each is differential to be 0.44 volt, the output voltage excursion is the 0-7 volt, the inverting input of Schmidt's voltage comparator links to each other with the electric resistance array on the control panel, be used to be provided with the reference voltage of several different brackets, fire regulation is made up of a high-power silicon controlled rectifier and no-voltage circuits for triggering (10), guarantee near high-power silicon controlled rectifier conducting no-voltage, to prevent that other electrical equipment is constituted electromagnetic interference, control end input positive voltage controllable silicon at the no-voltage circuits for triggering ends, heater stops heating, the conducting of input no-voltage controllable silicon, the omnidistance heating of heater, pulse width normalizing device is made of one 555 time base circuit, the rectangular pulse that width is differed, be adjusted into the pulse of unified width, use positive voltage to trigger by phase inverter.Pulse rectifier is made up of constant current charger and π shape RC integral filter circuit that triode constitutes, and the rectangular pulse of the same width that frequency is different is converted to corresponding DC voltage, and frequency is big, the DC voltage height, on the contrary then low.The control circuit that is made of single-chip microcomputer is made of 8 PIC single-chip microcomputers of a cheapness, can realize step-by-step counting, timer, LCD display driver, all multi-functional to the control end of firepower adjuster output control voltage etc., because energy is limit, the drawing up a plan of SCM program repeats no more.

The Figure of description explanation

Fig. 1 high-efficiency energy-saving steam and boil dual-purpose electric pressure cooker section of structure

Fig. 2 electronics fire regulation circuit diagram, wherein K is 70 ℃ of insulation temperature detect switch (TDS)s

Fig. 3 electronics timer circuit figure that boils, wherein Rc regularly regulates resistance, and LCD is the ripe indicator lamp of meal

The schematic circuit sketch of the control circuit of Fig. 4 embodiment 2, wherein IC ₁, IC ₂, IC ₃, IC ₄. be a four high guaily unit integrated package LM324, BJ is an electric resistance array of manually adjusting reference voltage, and several adjustment buttons are positioned on the control panel.

The control circuit theory diagram of Fig. 5 embodiment 1

Among the above figure: 1, magnetic rotatable special pressure limiting valve; 2, electromagnetic induction coil or Hall element; 3, control circuit; 4, the heater on the electric heating plate; 5, control panel; 6, pressure cooker body; 7, insulation shell; 8, overtemperature loss of excitation disconnect; 9, high-power silicon controlled rectifier; 10, no-voltage circuits for triggering; 11, pulse amplification shaping device; 12, pulse width normalizing device; 13, pulse rectifier; 14, Schmidt's voltage comparator; 15, pulse counter; 16, digital to analog converter.

Claims

1, high-efficiency energy-saving steam and boil dual-purpose electric pressure cooker, by pressure cooker body, electric heating plate, pressure limiting valve, over-temp and over-pressure fuse sheet, overtemperature loss of excitation disconnect, electronics fire regulation, form to a some work timing device, boil electronics stator device, insulation shell, control panel etc., it is characterized in that: pressure limiting valve is the special pressure limiting valve that is made of magnetic material or magnetic material and nonmagnetic substance combine, and the exit, bleeder port road around it tilts to circumferencial direction---when steam is gone out in the pot, can make its rotation.

2, high-efficiency energy-saving steam and boil dual-purpose electric pressure cooker according to claim 1 is characterized in that: the next door of pressure limiting valve is equipped with strong and weak electromagnetic induction coil or the Hall element that has changed induction effect in magnetic field.

3, high-efficiency energy-saving steam and boil dual-purpose electric pressure cooker according to claim 2, it is characterized in that: described electromagnetic induction coil or Hall element are owing to the induction electrical pulse that the rotation of special pressure limiting valve produces is to handle by control circuit, relatively export control signal in the back with an artificial a reference value of setting then, remove to adjust fire regulation, the mean power of electric hot tray is locked on the fixed value, thereby the speed of releasing of steam is locked on the fixing value, changes the velocity amplitude that releases that a reference value just can change steam.

4, high-efficiency energy-saving steam and boil dual-purpose electric pressure cooker according to claim 3, it is characterized in that: described control circuit is made up of pulse amplification shaping device, pulse counter, D/A converter, four unit of Schmidt's voltage comparator, and induction coil or Hall element are electrically connected with pulse amplification shaping device input, Schmidt's voltage comparator output is electrically connected with the input of electronics fire regulation, the start end of boiling timer.

5, high-efficiency energy-saving steam and boil dual-purpose electric pressure cooker according to claim 3 is characterized in that: described control circuit also can be made of pulse amplification shaping device, pulse width normalizing device, pulse rectifier, Schmidt's voltage comparator Unit four.

6, according to claim 3,4 or 5 described high-efficiency energy-saving steam and boil dual-purpose electric pressure cookers, it is characterized in that: the velocity amplitude that releases of pressure limiting valve steam is by setting by the reference voltage value that described Schmidt's voltage comparator is set on control panel.

7, high-efficiency energy-saving steam and boil dual-purpose electric pressure cooker according to claim 3 is characterized in that: described control circuit also can be made of a slice single-chip microcomputer.