CN2053829U

CN2053829U - Electric rice cooker

Info

Publication number: CN2053829U
Application number: CN88205630U
Authority: CN
Inventors: 吴林春
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-05-05
Filing date: 1988-05-05
Publication date: 1990-02-28

Abstract

The utility model relates to an electric rice cooker having multiple functions which is controlled by an electronic route and can automatically cook at a preset time according to users' will and can automatically turn into the process of rice steaming after boiling; at the time required, the utility model can automatically cut off power supply and can also select heat preservation after rice cooked according to users' will. A temperature sensing element used is silicon triode and a dual-direction silicon-controlled without touching points is used as a switching element, so the utility model has long service life. An electric heating plate adopts lost-cost chip of an electric iron to be fixed between two casting aluminum sheets by screws, and a layer of heat preserving material is added between an inner cooker and an outer cooker.

Description

Electric rice cooker

The utility model relates to a kind of electric rice cooker, be have the time of putting of can giving, automatically powered-down, can adjust temperature required etc. multi-functional, long-life electric rice cooker.

Present employed automatic heat preserving formula electric rice cooker, though simple in structure, a lot of shortcoming parts are arranged, example: 1, can not after several hours, make meal according to customer requirements by giving the automatic energized of fixing time; 2, powered-down automatically, the ripe follow-up continuation of insurance temperature of meal makes electric rice cooker still be in operating state; 3, in use temperature immobilizes, the temperature of the change heat food that healed of can not following one's inclinations; 4, use magnetic temperature switch control, but big because of cooker power, switch is frequent, is easy to make magnetic temperature switch to damage, the bimetal release contact of usefulness and produce lack of fusion, and loose contact, thereby caused and cooked half-cooked or paste Jiao, shortened useful life; 5, do not have heat-insulating material between interior pot and the outer pot, heat insulation effect is bad.

The purpose of this utility model be the design a kind of can according to customer requirements after several hours by beginning to do meal seclected time automatically; Can adopt the ripe insulation form of meal or cut off the electricity supply automatically by giving the requirement that is provided with earlier according to user's wish after meal is ripe; The electric rice cooker of the new frequency that can after gruel, boiling water are boiled, cut off the electricity supply automatically.

The utility model is achieved in that temperature-sensing element (4) adopts silicon triode, and the electric hot tray degree is screwed between two cast aluminium sheets with electric iron chip (3).Control loop is provided with: 1, can by customer requirements after several hours automatically energized giving of beginning to cook put time loop (C7, W3, WD2, R21～R24, BG11～BG15, K7, K8); 2, the bistable state loop that can overturn (BG2, BG3, R5, R6, R4, R7, C5, D1, D2)---overturn when temperature rises to 103 ℃ in this loop, becomes vexed meal temperature by the process of cooking and remain at all the time about 70 ℃; 3, the time delay loop (BG6～BG8, R25, R13-R16, WD1, C4) of a vexed meal time of control; 4, can cut off the electricity supply to temperature-sensing element BG1 clamp when conducting in a simulation controllable silicon loop (BG9, BG10, R17, R18, C3), finishes the process of cooking; 5, a multiple tube promotes loop (R10, R11, BG4, BG5, D4, D10), and a two-way contactless controllable silicon KS is arranged between this circuit and the electric heating element (3) ₁, by the conducting of multiple tube (BG4, BG5) or by direct control electric rice cooker or automatically energized begin to cook, heat up or cooling or automatically powered-down finish to cook overall process;

Of the present utility model giving put the time loop by following principle work: regulate W3 and give and putting the time that begins to cook, press K4, K7 and make C4, C7 discharge, and closed mains switch K1, the LED3 power supply indicator is bright in the control loop.This moment, power supply EC charged to C7, gave putting BG12 in the time loop, BG13 and ending.BG13 collector electrode high potential, R24, BG14 form emitter follower.Therefore the A point is a high level, the BG15 conducting.Making multiple tube promote output point B in the loop (R10, R11, D10 D4, BG4, BG5) or door (R10, R11, D10, D4) and be clamped at certain value, is the value less than BG4, BG5 junction voltage sum.BG4, BG5 end, and make KS1 block, and this process is gives the time of putting.When required time then, when the C7 both end voltage equals the junction voltage sum of the voltage stabilizing value of WD2 and BG12, BG13, BG12, BG13 conducting.Because the effect of the emitter follower of BG14, BG15 ends, and has lost clamping action, and the A point is an electronegative potential among Fig. 2.The bistable loop is made of BG2, BG3, R4, R5, R6, R7, D1, D2, C5, and all to be that BG2 is full when powering up close conducting at every turn in this bistable loop, and BG3 ends, and the high potential of the collector electrode of BG3 has been added to the base stage of BG4 by K3, R11, D4.Lost clamping action by BG15, BG4, BG5 conducting, electric current flows to LED from EC ₁, R12 and make controllable silicon KS ₁Conducting, at this moment electric rice cooker begins to cook.This moment, LED1 was luminous is indicated.

When electric rice cooker begins to do after meal, along with temperature raises, the BG1 junction voltage begins to reduce among Fig. 2 Up point electricity and puts constant.The BG1 collector voltage begins to descend, and when temperature rose to 103 ℃, the collector potential of BG1 was reduced to and made D3 conducting, the upset of bistable loop.The collector potential of BG3 becomes conducting by original ending, and makes that the B point is an electronegative potential, and BG4, BG5 are cut-off state, KS ₁Close.Stop electric rice cooker being heated.Temperature descends, and during to 70 ℃, the BG1 collector potential raises, when C point current potential is to 1.5v among the figure (by the levelling of K8, R9), and multiple tube BG4, BG5 conducting again.Controllable silicon KS ₁Conducting, electric rice cooker heats again; When greater than 70 ℃, C point current potential descends again among the figure, and multiple tube BG4, BG5 end, KS ₁Disconnect again; So repeatedly, too 70 ℃ of temperature, KS ₁Disconnect, temperature remains at about 70 ℃ temperature less than conducting, and Here it is with the optimum temperature of the vexed meal of electric rice cooker.This time is to get final product in 15 minutes, among the figure: the time delay loop that K2, C4, R25, BG6, BG7, BG8, WD1, R14, R15, R16 form, can make the above-mentioned vexed meal time keep 15 minutes (levelling by W2, R13 can be pass and be longer than 15 minutes by the meaning selection vexed meal time, or short).

When the vexed meal time then, BG7 is saturated, BG8 ends, the collector electrode of BG8 impels the simulation controllable silicon conducting of being made up of BG9, BG10, R17, C3, makes the collector clamp of temperature-sensing element BG1, then BG4, BG5 end, KS ₁Be closed, the luminous demonstration of LED2 is at this moment made the meal process and is all finished, and power supply is closed automatically.

The temperature of wanting to remain meal as the user then disconnects K6 about 70 ℃, this moment BG1 collector electrode not by clamp, then the temperature of electric rice cooker remains at about 70 ℃, is warm meal.At this moment LED ₂Still luminous demonstration.

As giving the time of putting, directly begin to cook, then disconnect K8, the time gives and puts the loop and do not have an effect.Electric rice cooker is promptly cooked automatically as required, vexed meal, program be with top the same.

The utility model can be realized multiple function by customer requirements, can align serviceability temperature (or 103 ℃, or greater than 103 ℃, levelling W1), the automatic powered-down that finishes of cooking by customer requirements that is:; Or keep uniform temperature (70 ℃ of examples reach by levelling R8, R9, W4) automatically by customer requirements; Or by customer requirements then automatically energized begin to cook ... etc. multiple function, simultaneously, owing to used silicon triode to make temperature-sensing element, switch element has been selected contactless bidirectional triode thyristor for use, so long key element of the utility model life-span is not fragile.Overcome the shortcoming of existing electric rice cooker.Be a kind of desirable, the family expenses kitchenware that is suitable for.

Description of drawings:

Fig. 1 is a structure chart of the present utility model:

The outer pot cover of 1-; The 2-outer pot; The 3-electric hot tray; The 4-temperature-sensing element; The 5-inner pot cover; The 6-heat insulation layer; Pot in the 7-; The solid range of 8-; The 9-electronic control part.

Fig. 2 is an electronic-circuit diagram of the present utility model:

BG1-is (4) among silicon triode Fig. 1; Between 2 of a, the b (3) among electric heating element Fig. 1; The W1-temperature adjustment knob; The vexed meal of W2-is regulated time of delay; W3-gives and puts selection of time; The vexed meal temperature of W4-is selected;

Form power supply indication loop by R20, LED3, LED3 is a power supply indicator.Closed K1, LED3 is bright;

Claims

1, a kind of electric rice cooker has heat-insulating material between interior pot and the outer pot, and its electric hot tray is that (a, b) 2 joins in electric iron chip (3) and the control loop, it is characterized in that:

Temperature control element (4) is a silicon triode (BG1), above-mentioned electric rice cooker has one to put time circuit (C7 by giving, W3, R21～R24, WD2, BG11～BG15, K7, K8), bistable state loop (the BG2 that can overturn, BG3, R5, R6, R7, R4, C5, D1, D2), multiple tube promotes loop (R10, R11, K3, D4, D10, BG4, BG5), control timing circuit (BG6～BG8 of vexed meal time, R25, R13～R16, WD1～C4) and simulation controllable silicon loop (BG9, BG10, R17, R18, C3) control loop of Zu Chenging, multiple tube promotes multiple tube (BG4 in the loop, BG5) be connected to a contactless bidirectional triode thyristor KS1 on the collector electrode, the collector electrode of above-mentioned temperature-sensing element BG1 joins by D3 and above-mentioned bistable state loop, the collector electrode of BG1 also passes through R8, R9 and multiple tube promote loop (K3, R10R11, D10, D4, BG4, BG5) join, above-mentioned timing circuit (BG6～BG8, W2, R13, R25, C4, WD1, R14～R16) passes through R25, K5, K2 and bistable state loop join, the collector electrode of BG1 is by D5 and simulation controllable silicon (R17, R18, LED2, C3, BG9, R10) loop joins, and above-mentionedly gives the time of putting and promotes D10 in the loop by D11 and multiple tube, the tie point of D4 joins.

2, a kind of electric rice cooker according to claim 1, it is characterized in that above-mentioned bistable state loop is made up of D1, D2, R4～R7, C5, BG2, BG3, collector electrode by diode D3 and temperature-sensing element BG1 joins, R11 joins in collector electrode by BG3 and the multiple tube conducting loop, joins by K2, K5, R25 and timing circuit.

3, a kind of electric rice cooker according to claim 1, it is characterized in that said multiple tube promotes the loop by K3, R10, R11, D10, D4, BG4, B, BG5 forms, above-mentioned multiple tube promotes R10 in the loop, R11, D10, D4 forms the diode OR gate circuit, two input one end is by divider resistance R9, the collector electrode of R8 and temperature-sensing element BG1 joins, the collector electrode of BG3 joins in another input termination and the bistable loop, or door (R10, R11, D4, D10) output is put time loop (C7 by D11 with giving, W3, WD2, BG11, BG15, R21～R24) join, multiple tube (BG4, BG5) collector electrode and contactless bidirectional triode thyristor KS1 join.

4, a kind of electric rice cooker according to claim 1, it is characterized in that above-mentioned giving put time circuit and be made up of C7, W3, WD2, BG11～BG15, R21～R24, the tie point that promotes D10, D4 in the loop by D11 and multiple tube joins, and collector electrode and WD1, R25 by BG6 in D12 and the timing circuit join.

5, a kind of electric rice cooker according to claim 1, the timing circuit that it is characterized in that the vexed meal time of above-mentioned control is made up of W2, R25, R13～R16, C4, W, WD1, BG6, BG7, BG8, join by R25, K5, K2 and bistable state loop, by working power, collector electrode and the simulation controllable silicon (LED2, BG9, BG10, R17, R18, C3) of reference ground, BG8 join.

6, a kind of electric rice cooker according to claim 1, it is characterized in that simulating the controllable silicon loop is made up of R17, R18, BG9, BG10, the common point and the timing circuit of the base stage of R17, C3, BG10, BG9 collector electrode join, and the collector electrode of BG10 joins by the collector electrode of D5 and bistable state loop and BG1.