CN86201061U

CN86201061U - Timer for electric pot

Info

Publication number: CN86201061U
Application number: CN 86201061
Authority: CN
Inventors: 汪景营
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-02-26
Filing date: 1986-02-26
Publication date: 1987-06-03

Abstract

The utility model discloses a timer for electric cooker, which belongs to a household appliance. The existing timers can be classified as electronic timers and mechanical timers of spring type and motor type, and the former has short service life, more error (when the load current is more than 5 amperes, the cost is high), and is influenced by power cut. The utility model comprises an electric source, an amplifying switch circuit, an instant electromagnetic controller, and an electronic time recorder. The timer for electric pot is not influenced by power cut, and the timed time can be 24 hours. The utility model has the advantages of little error and long service life. Four No. 5 batteries can be used for eight months, and the electric current of 10 amperes can be controlled. The utility model can be matched with an electric rice cooker to make people eat fresh rice, and save the electrical energy which is consumed to keep rice warm by the electric rice cooker.

Description

Timer for electric pot

The utility model belongs to household electrical appliance.

The timer that uses mainly contains mechanical timer and ac synchronous motor formula and the electronic timer that is made of clockwork spring at present, the former error must continue more greatly to wind up, therefore operate inconvenience and life-span weak point, the complete machine cost is too high during latter's bringing onto load 5A, inconvenience is promoted, and in use in case power failure just must be readjusted timing, so all not too be suitable for and the supporting use of electric cooker.Also there is not this special-purpose timer of electric cooker that for a long time, is not had a power failure and influence in the market.

The purpose of this utility model be exactly the load current of 10A can be provided, do not had a power failure influence, timing reaches 24 hours, error less than 1 second/day timer, special and electric cooker is joined use, make people can in time have fresh meal, and avoid electric cooker to be incubated consumed power for a long time, prolong the life-span of electric cooker.

The utility model is made up of power supply (1), power supply (2), amplification switch circuit (3), transient electromagnetic controller (4), electronic timer (5).Fig. 1, when depressing the start key of timer transient electromagnetic controller (4), its normally open contact (6) is connected power supply (2), and normally closed interlock (7) disconnects simultaneously, the electric cooker power-off.When arriving, electronic timer (5) gives when fixing time, the warning output is exported the electronegative potential pulse suddenly by zero potential, the input of amplification switch circuit (3) is owing to the input negative pulse makes its final stage switching transistor conducting, drive transient electromagnetic controller (4) and discharge start key, in moment, normally open contact (6) is cut off the electricity supply (2), and normally closed interlock (7) resets and connects the electric cooker power supply.The normally open contact of this timer (8) can provide the timing controlled of making other electrical equipment.

The utility model electric cooker timer is not subjected to have a power failure to be influenced, and timing is 24 hours, its error in 24 hours less than 1 second, but displaying calendar and time simultaneously during to fixing time, can report to the police.

One of the utility model electric cooker timer enforcement---this timer logic figure such as Fig. 1 are described, electronic timer (5) adopts Hong Kong to produce 8304 type electronic timers, and its power supply (1) is 1.5 volts, 3 microamperes of power consumptions.Electronic timer (5) fixed to give fix time after, depress the start key of transient electromagnetic controller (4), the locking plate of transient electromagnetic controller (4), start key is locked, meanwhile the groove on the start key key lever is depressed the reed of normally closed interlock (7), make normally closed interlock (7) open circuit, normally open contact when depressing start key (6), (8) closure.Because the closure of normally open contact (6), connecting its DC voltage of power supply (2) is 4.5 volts, makes amplification switch circuit (3) and transient electromagnetic controller (4) connect power supply, in running order.(power consumption 0.02MA) is when the large scale integrated circuit PSI of electronic timer (5) undersuing that output output is interrupted of giving the correct time, (0.01 volt) makes the switching transistor conducting 0.2 second of amplification switch circuit (3), (about 100MA) DM, its armature promotes the release lever of transient electromagnetic controller (4), thereby release lever promotes locking plate discharges start key, key lever has driven normally closed interlock (7) reed and has made normally closed interlock (7) closure when start key resets, connect the electric cooker power supply, normally open contact (6) is in instantaneous trip power supply (2) simultaneously.Amplification switch circuit (3) circuit such as Fig. 2 are by transistor BG ₁, BG ₂Form composite amplifier, by BG ₃Form second level amplifying circuit, BG ₄Be switching tube, its operation principle is: when the no negative pulse of a end is imported, and compositing amplification tube BG ₁, BG ₂End, make BG ₃, BG ₄All end.Be connected on BG ₄In the electromagnet coil on the collector loop, there is not electric current (BG substantially ₄Leakage current, about 0.02MA) electromagnet armature do not inhale.When electronic timer (5) the PSI output that gives the correct time, the undersuing of output act on a end of Fig. 2, BG ₁, BG ₂Just be in magnifying state, BG ₃Conducting, BG ₄Then be in the full conducting state of closing.The electric current of its collector load J is raised to 100MA suddenly by 0.02MA, electromagnet armature is inhaled and is promoted the relieving mechanism of transient electromagnetic controller (4), as Fig. 3, the transient electromagnetic controller is to add the transformation of the way of part such as electromagnet to form with KEJ--3 type detachable key switch, and its assembly is: electromagnet armature (9), resetkey (10), start key (11), release lever (12), locking plate (13), normally closed moving contact (14), normally closed static contact (15), start key lever groove (16), release lever fork-shaped push rod (17), normally open contact (18).Giving when fixing time, press start key (11), locking plate pins start key (11), the reed that startup key lever groove (16) presses normally closed moving contact (14) moves down, make normally closed moving contact (14) and normally closed static contact (15) open circuit, be normally open contact (7) open circuit, be connected on the electric cooker power-off on the timer like this.When pressing start key (11), start key normally open contact (6) closure, i.e. CK closure among Fig. 2 is connected the power supply of amplification switch circuit (3).When electromagnet armature (9) is inhaled and when promoting release lever fork-shaped push rod (17), release lever (12) turns clockwise, its squared ends is crowdedly moved locking plate (13) displacement to the right, and release start key (11).Start key (11) starts key lever groove (16) and drives normally closed moving contact (14) when resetting, and makes itself and normally closed static contact (15) closure, connects 220 volts of AC powers of electric cooker.Can control other electrical equipment with normally open contact (18) regularly opens and closes.When start key (11) resetted, start key normally open contact (6) disconnected, and has cut off power supply (2), i.e. 4.5 volts of dc sources.The time that amplification switch circuit (3) is in 100MA current work state only has 0.2 second! This is the electric cooker timer, under the situation without AC power, uses dc source, and the key of the very little design of power consumption.Complete machine except that 3 microamperes of electronic timer (5) power consumptions, finish regularly connect the electric cooker power supply after, not power consumption pond electric energy basically, complete machine saves No.5 cells with four and can use eight months.

Description of drawings

Fig. 1: complete machine logic chart

(1) power supply (5) electronic timer

(2) power supply (6) normally open contact

(3) amplification switch circuit (7) normally closed interlock

(4) transient electromagnetic controller (8) normally open contact

Fig. 2: amplification switch circuit figure

Fig. 3: transient electromagnetic controller architecture figure

(9) the normally closed moving contact of electromagnet armature (14)

(10) the normally closed static contact of resetkey (15)

(11) start key (16) starts the key lever groove

(12) release lever (17) release lever fork-shaped push rod

(13) locking plate (18) normally open contact

Claims

The utility model is a kind of electric cooker timer, form by electronic timer (5) and power supply (1), it is characterized in that forming by power supply (2), amplification switch circuit (3) and transient electromagnetic controller (4), wherein the input of amplification switch circuit (3) is received in the output of electronic timer (5), and the output of amplification switch circuit (3) receive the input And of transient electromagnetic controller (4) and wherein power supply (1) supply with electronic timer (5), power supply (2) is supplied with amplification switch circuit (3) and transient electromagnetic controller (4).