CN201341795Y - Rice cooker and control circuit thereof - Google Patents
Rice cooker and control circuit thereof Download PDFInfo
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- CN201341795Y CN201341795Y CNU2009200038732U CN200920003873U CN201341795Y CN 201341795 Y CN201341795 Y CN 201341795Y CN U2009200038732 U CNU2009200038732 U CN U2009200038732U CN 200920003873 U CN200920003873 U CN 200920003873U CN 201341795 Y CN201341795 Y CN 201341795Y
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Abstract
The utility model provides a control circuit for a rice cooker, which comprises a power supply, an insulation unit, a first heating unit, a control switch K1 and a temperature controller T, wherein the control switch K1 controls an alternating-current electromagnetic relay, the control switch K1 is connected with the first heating unit in series to form a series branch through a first end, and the power supply, the insulation unit and the series branch are parallelly connected to form a parallel branch. The first end of a coil of the alternating-current electromagnetic relay is connected with the first end of the control switch K1 through the temperature controller T, a second end of the coil thereof is connected with the first end of the parallel branch, a normally open contact thereof is connected with the first end of the control switch K1, and a moving contact thereof is connected with the second end of the parallel branch. The utility model further provides a rice cooker with the control circuit. The control circuit for the rice cooker omits parts which are a magnetic steel temperature limiter, a lever, a micro switch and rotating shafts and the like, the circuit on-off control structure of the rice cooker is simple, and the cost of the rice cooker is reduced.
Description
Technical field
The utility model relates to household appliance technical field, in particular to a kind of electric cooker and control circuit thereof.
Background technology
Electric cooker in the market mainly adopts microelectric technique and two kinds of control modes of mechanical type, and wherein, the mechanical type electric cooker uses magnetic steel temperature limiter to realize the function of cooking usually.
According to the magnetic steel temperature limiter electric cooker of prior art, by the interoperation of parts such as magnetic steel temperature limiter, lever, microswitch, rotating shaft, the break-make of coming control circuit, thus control the whole process of cooking.Fig. 1 shows the structure chart according to the magnetic steel temperature limiter electric cooker of prior art, and Fig. 2 shows the circuit diagram according to the magnetic steel temperature limiter electric cooker of prior art.Below with reference to Fig. 1 and Fig. 2, this process is described.
After pot is put into electric cooker in treating, press lever button 101, soft, the hard magnetic body that are in the magnetic steel temperature limiter 103 of lever 102 other ends are pushed adhesive, and then drive is installed in microswitch 104 closures on the lever 102 equally, heat-generating disc 105 is switched on and generates heat, pot in its heat transferred is close-fitting with it; Along with the rice in pot boils evaporation with moisture content, temperature in pot rises, when temperature rises to 145 ± 5 when spending, magnetic steel temperature limiter 103 actions, promptly soft, hard magnetic body separates, and then drives microswitch 104 disconnections, and heat-generating disc 105 stops heating, through about 10 minutes cook rice over a slow fire, the process of cooking was promptly finished again.
Wherein, be made up of soft magnetic bodies and hard magnetic body, its basic principle is as follows: during low temperature, soft, hard magnetic body is inhaled and is in the same place; When temperature reached the Curie-point temperature of soft magnetic bodies, soft magnetic bodies lost magnetism, and under the effect of compression spring force, soft, hard magnetic body is separated.Magnetic steel temperature limiter is applied in the electric cooker, the suction of, hard magnetic body soft along with it and or separately, microswitch is driven closed by leverage power or disconnects, thereby controls the heat-generating disc heating indirectly or do not generate heat, with the purpose that realizes cooking.
In realizing the utility model process, the inventor finds the magnetic steel temperature limiter electric cooker of prior art, and there are the following problems at least: its connecting and disconnecting of the circuit control structure comprises parts such as magnetic steel temperature limiter, lever, microswitch, rotating shaft, the structure more complicated has increased cost.
The utility model content
The utility model aims to provide a kind of electric cooker and control circuit thereof, can solve the connecting and disconnecting of the circuit control structure more complicated of the electric cooker of prior art, the problem that cost is high.
In embodiment of the present utility model, a kind of control circuit that is used for electric cooker is provided, comprise: the gauge tap K1 and the temperature controller T of power supply, heat-insulation unit, first heating unit, alternating current electromagnetic relay and control alternating current electromagnetic relay, wherein gauge tap K1 connects with first heating unit by first end and forms series arm; Power supply, heat-insulation unit and the series arm parallel branch that forms in parallel; First end of the coil of alternating current electromagnetic relay links to each other with first end of gauge tap K1 by temperature controller T, second end of its coil links to each other with first end of parallel branch, its normally opened contact links to each other with first end of gauge tap K1, and its movable contact links to each other with second end of parallel branch.
Preferably, in above-mentioned control circuit, moving the run pass of gauge tap K1 for often opening.
Preferably, in above-mentioned control circuit, also comprise: gauge tap K2, its first end links to each other with the normally opened contact of alternating current electromagnetic relay, and second end links to each other with first end of gauge tap K1, and gauge tap K2 is that normally closed moving disconnection is closed.
Preferably, in above-mentioned control circuit, also comprise: the insulation indicator unit, its first end links to each other with the normally-closed contact of alternating current electromagnetic relay, and second end links to each other with first end of parallel branch; The indicator unit of cooking, it is in parallel with first heating unit.
Preferably, in above-mentioned control circuit, the insulation indicator unit comprises the insulation indicator lamp and first resistance of series connection, and the indicator unit of cooking comprises the cook indicator lamp and second resistance of series connection.
Preferably, in above-mentioned control circuit, also comprise: the second temperature controller T1, its first end links to each other with first end of gauge tap K1, and second end links to each other with first end of first heating unit; Second heating unit, it is connected with the indicator unit of cooking by first end; Menu unit, its movable contact links to each other with first end of gauge tap K1, and its first stationary contact links to each other with first end of first heating unit, and its second stationary contact links to each other with first end of second heating unit.
Preferably, in above-mentioned control circuit, also comprise: the indicator unit of cooking congee, it is in parallel with second heating unit.
Preferably, in above-mentioned control circuit, menu unit is a single-pole double-throw switch (SPDT); Second heating unit comprises diode in series and heat-generating disc R6; The indicator unit of cooking congee comprises the cook congee indicator lamp and the 3rd resistance of series connection.
Preferably, in above-mentioned control circuit, also comprise: the second temperature controller T1, its first end links to each other with first end of gauge tap K1, and second end links to each other with first end of first heating unit; Second heating unit comprises diode in series and heat-generating disc R6, and its first end by diode links to each other with second stationary contact of menu unit, links to each other with first end of parallel branch by heat-generating disc R6; Menu unit, it is the SP3T switch, and its movable contact links to each other with first end of gauge tap K1, and its first stationary contact links to each other with first end of first heating unit, and its 3rd stationary contact links to each other with second end of diode.
In embodiment of the present utility model, a kind of electric cooker also is provided, have the control circuit of above preferred embodiment.
Control cooking of electric cooker and insulating process because adopt alternating current electromagnetic relay, solve the connecting and disconnecting of the circuit control structure more complicated of the electric cooker of prior art, the problem that cost is high, thereby parts such as magnetic steel temperature limiter, lever, microswitch, rotating shaft have been saved, the connecting and disconnecting of the circuit control structure of electric cooker is simple, and has reduced the cost of electric cooker.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 shows the structure chart according to the magnetic steel temperature limiter electric cooker of prior art;
Fig. 2 shows the circuit diagram according to the magnetic steel temperature limiter electric cooker of prior art;
Fig. 3 shows the circuit diagram according to the control circuit that is used for electric cooker of the utility model embodiment;
Fig. 4 shows the circuit diagram according to the control circuit that is used for electric cooker of the utility model first preferred embodiment;
Fig. 5 shows the circuit diagram according to the control circuit that is used for electric cooker of the utility model second preferred embodiment;
Fig. 6 shows the circuit diagram according to the control circuit that is used for electric cooker of the utility model the 3rd preferred embodiment.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Fig. 3 shows the circuit diagram according to the control circuit that is used for electric cooker of the utility model embodiment, and Fig. 4 shows the circuit diagram according to the control circuit that is used for electric cooker of the utility model first preferred embodiment.As shown in Figure 3 and Figure 4, this control circuit comprises: gauge tap K1 and the temperature controller T of power supply 10 (alternating current 220V), heat-insulation unit 20, first heating unit 30, alternating current electromagnetic relay G and control alternating current electromagnetic relay G, and wherein gauge tap K1 connects with first heating unit 30 by first end and forms series arm; Power supply 10, heat-insulation unit 20 and the series arm parallel branch that forms in parallel; First end 4 of the coil of alternating current electromagnetic relay G links to each other with first end of gauge tap K1 by temperature controller T, second end 5 of its coil links to each other with first end of parallel branch, its normally opened contact 3 links to each other with first end of gauge tap K1, and its movable contact 1 links to each other with second end of parallel branch.
The principle of alternating current electromagnetic relay is: when electric current passes through, produce electromagnetic force, armature overcomes the pulling force of spring and inhales to iron core under the effect of electromagnetic attracting force, thereby driving its movable contact and normally opened contact connects, after outage, electromagnetic force disappears, and armature returns original position under the reaction force of spring, movable contact and normally-closed contact are connected, thereby reached the purpose of the conducting/cut-out in circuit.
The preferred embodiment is owing to adopt alternating current electromagnetic relay, utilize its above-mentioned characteristic, control cooking and insulating process of electric cooker, solve the connecting and disconnecting of the circuit control structure more complicated of the electric cooker of prior art, the problem that cost is high, thereby saved parts such as magnetic steel temperature limiter, lever, microswitch, rotating shaft, the connecting and disconnecting of the circuit control structure of electric cooker is simple, and has reduced the cost of electric cooker.Simultaneously, the electric cooker that has solved prior art causes easily because of the movable dumb malfunction that produces of the parts of need activity, has reduced because of the movable dumb malfunction that produces of the parts of need activity.
In preferred embodiment as shown in Figure 4, heat-insulation unit 20 is warming plate R2 of electric cooker, and first heating unit 30 is heat-generating disc R1 of electric cooker.Thermal fuse F U is connected in the main line of circuit, plays the effect of holding circuit.
Wherein, moving the run pass of gauge tap K1 for often opening.Promptly, promptly disconnect then in the effect closure of following moment of external force.Gauge tap K1 can be touch button, begins key as function.Like this, it is unrestricted that function begins the installation site of key, can be installed on pot side, also can be installed on pot top, thereby improved the outward appearance and the structure of the electric cooker of prior art greatly.
Preferably, as shown in Figure 4, in above-mentioned control circuit, also comprise: gauge tap K2, its first end links to each other with the normally opened contact 3 of alternating current electromagnetic relay G, and second end links to each other with first end of gauge tap K1, and gauge tap K2 is that normally closed moving disconnection is closed.
The preferred embodiment is by being provided with gauge tap K2, and the function that provides interruption to cook is as the function end key.Equally, the installation site of function end key is also unrestricted, can be installed on pot side, also can be installed on pot top, thereby has improved the outward appearance and the structure of the electric cooker of prior art greatly.
Preferably, as shown in Figure 3 and Figure 4, in above-mentioned control circuit, also comprise: insulation indicator unit 40, its first end links to each other with the normally-closed contact 2 of alternating current electromagnetic relay G, and second end links to each other with first end of parallel branch; The indicator unit 50 of cooking, it is in parallel with first heating unit 30.
Wherein, insulation indicator unit 40 comprises the insulation indicator lamp DX2 and first resistance R 4 of series connection, and the indicator unit of cooking 50 comprises cook the indicator lamp DX1 and second resistance R 3 of series connection.
The preferred embodiment is by being provided with the insulation indicator unit 40 and the indicator unit 50 of cooking in circuit, the insulation indicator lamp DX2 and the indicator lamp DX1 that cooks are luminous when electric cooker is in keeping warm mode and cooks state respectively, thereby can indicate the duty of electric cooker to the user, make that the use of electric cooker is more flexible, hommization more.
The operation principle of this control circuit is described with reference to figure 4:
When according to the good Mi Shuihou of correct rice water proportional quantities, the interior pot that installs Mi Shui is put into electric cooker, and when connecting the alternating voltage of 220V for the two ends of power supply, thermal circuit is a path, therefore warming plate R2 energising produces heat, temperature 60 to 80 degree when being incubated to keep electric cooker.Simultaneously, because the movable contact 1 of alternating current electromagnetic relay G is connected with normally-closed contact 2, the normally closed switch that is electromagnetic relay G is in closure state, so the series arm of resistance R 4 and insulation indicator lamp DX2 is in parallel with warming plate R2, and then electric current can pass through resistance R 4 and insulation indicator lamp DX2 via the normally closed switch of electromagnetic relay G, make that insulation indicator lamp DX2 is luminous, indicate this control circuit to be in keeping warm mode at this moment; In addition, if after the process of cooking is finished, circuit also can enter keeping warm mode automatically.
When pushing gauge tap (moving together contact) K1, the feasible circuit of cooking is a path, and then electric current is by heat-generating disc R1, and the food in interior pot is heated in heat-generating disc R1 heating.Equally, because resistance R 3 is in parallel with series arm and the heat-generating disc R1 of the indicator lamp DX1 that cooks, so electric current also can be by the resistance R 3 and the indicator lamp DX1 that cooks, the feasible indicator lamp DX1 that cooks is luminous; And temperature controller T (Kick type temperature controller) also is in parallel with the series arm and the heat-generating disc R1 of electromagnetic relay G coil, so electric current also can be by the coil of temperature controller T and electromagnetic relay G, because electromagnetic induction, produce electromagnetic force, make the movable contact 1 of electromagnetic relay G and normally opened contact 3 connect, and disconnect with normally-closed contact 2, thereby make insulation indicator lamp DX2 outage, at this moment, the indicator lamp DX1 that only cooks in this control circuit is luminous, and it indicates this control circuit to be in the state of cooking.By such connected mode, make this control circuit be in self-locking state, after promptly gauge tap K1 disconnects, because movable contact 1 and normally opened contact 3 conductings of electromagnetic relay G, so entire circuit still is in the state of cooking, can work on, heat-generating disc R1 continues heating.
R1 constantly heats along with heat-generating disc, the temperature of food can constantly rise in the interior pot, the temperature of pot in the temperature controller T induction, the temperature of temperature controller T also can constantly rise, when temperature reaches its operating temperature (about 145 ± 5 degrees centigrade), temperature controller T disconnects, electromagnetic relay G outage, then electromagnetic force disappears, so the movable contact 1 of electromagnetic relay G disconnects with normally opened contact 3, makes movable contact 1 and normally-closed contact 2 connect under the effect of electromagnetic relay spring, and then the indicator lamp DX1 that cooks is extinguished, and make insulation indicator lamp DX2 luminous once more, at this moment, electric cooker enters keeping warm mode automatically.
In the preferred embodiment, even temperature controller T descends because of temperature, path is recovered at its two ends, heat-generating disc R1 can not heat, because the gauge tap K1 of this moment disconnects, electric current has not so just guaranteed in insulating process by heat-generating disc R1, when the temperature of temperature controller T drops to recovery temperature (50 to 60 degrees centigrade) when following, the The whole control circuit still is in keeping warm mode.
When electric cooker is in when cooking state, if want to cancel the state of cooking, because gauge tap (break contact) K2 connects with the normally opened contact 3 of electromagnetic relay G, so only need push gauge tap K2, then electromagnetic relay G coil will cut off the power supply, so the movable contact 1 of electromagnetic relay G disconnects with normally opened contact 3, under the effect of electromagnetic relay spring, make movable contact 1 and normally-closed contact 2 connect, and then the indicator lamp DX1 that cooks is extinguished, and making insulation indicator lamp DX2 luminous once more, entire circuit also enters keeping warm mode automatically.Even after the break contact K2 closure, owing to do not have electric current in the series arm of temperature controller T and electromagnetic relay G coil, electromagnetic relay G coil can not produce electromagnetic force, thereby 1 of the movable contact of electromagnetic relay G may connect with normally-closed contact 2, so this moment, the The whole control circuit also was in keeping warm mode.
Fig. 5 shows the circuit diagram according to the control circuit that is used for electric cooker of the utility model second preferred embodiment, compare with first preferred embodiment shown in Figure 4, this control circuit also comprises: the second temperature controller T1, its first end links to each other with first end of gauge tap K1, and second end links to each other with first end of first heating unit 30; Second heating unit 60, it is connected with the indicator unit 50 of cooking by first end; The K3 of menu unit, its movable contact 1 links to each other with first end of gauge tap K1, and its first stationary contact cook links to each other with first end of first heating unit 30, and its second stationary contact conjee links to each other with first end of second heating unit 60.
The preferred embodiment makes the function that electric cooker can provide selection to cook and cook congee to make that the function of electric cooker is more complete by menu unit is set.
Preferably, as shown in Figure 5, in above-mentioned control circuit, also comprise: the indicator unit 80 of cooking congee, it is in parallel with second heating unit 60.Wherein, the K3 of menu unit is a single-pole double-throw switch (SPDT); Second heating unit 60 comprises diode in series D1 and heat-generating disc R6; The indicator unit of cooking congee 80 comprises cook congee the indicator lamp DX3 and the 3rd resistance R 5 of series connection.Compare with R1, the heating power of heat-generating disc R6 is littler, utilizes the unilateral conduction of diode D 1 can be so that the power of R6 reduces by half, to satisfy the temperature requirement of cooking congee.
Compare with Fig. 4, increased by the second temperature controller T1 (operating temperature of this temperature controller is 90 degrees centigrade to 95 degrees centigrade, and recovery temperature is about 80 degrees centigrade) in control circuit shown in Figure 5, it is connected with heat-generating disc R1; The series arm of heat-generating disc R6 and diode D1 is further connected with the series arm of the resistance R 3 and the indicator lamp DX1 that cooks; The series arm of the resistance R 5 and the indicator lamp DX3 that cooks congee, in parallel with the series arm of heat-generating disc R6 and diode D1; And functional select switch K3 (being menu unit).
As shown in Figure 5, when the first stationary contact cook of functional select switch K3 connects (selecting rice-cooking function), the operation principle of this circuit is identical with the operation principle of control circuit shown in Figure 4, repeat no more herein, it should be noted that, after pushing gauge tap K1, because the resistance of R3 is much larger than R6, so the indicator lamp DX1 that only cooks is bright; When the second stationary contact conjee of turn-on power loss selector switch K3 (selecting gruel boiling function), the operation principle of this circuit is as follows:
When the alternating voltage of 220V is connected at the two ends of power supply, thermal circuit is a path, therefore warming plate R2 energising produces heat, simultaneously, electric current also can pass through resistance R 4 and insulation indicator lamp DX2 via the normally closed switch of electromagnetic relay G, make that insulation indicator lamp DX2 is luminous, indicate this control circuit to be in keeping warm mode at this moment.
When pushing moving together contact K1, the feasible circuit of cooking congee is a path, and then electric current is by heat-generating disc R1 (high-power) and R6 (small-power), and the food in interior pot is heated in heat-generating disc R1 and R6 heating; Equally, because resistance R 5 is further in parallel with the series arm of diode D1 with series arm and the heat-generating disc R6 of the indicator lamp DX3 that cooks congee, so electric current also can be by the resistance R 3 and the indicator lamp DX3 that cooks congee, the feasible indicator lamp DX3 luminous (indicator unit of cooking 50 short circuits, the indicator lamp DX1 that cooks can not be luminous) that cooks congee; Simultaneously, electric current also can pass through temperature controller T and electromagnetic relay G coil, because electromagnetic induction makes electromagnetic relay coil produce electromagnetic force, make the movable contact 1 of electromagnetic relay G connect with normally opened contact 3, and disconnect with normally-closed contact 2, thereby make insulation indicator lamp DX2 outage, at this moment, the indicator lamp DX3 that only cooks congee in this control circuit is luminous, and it indicates this control circuit to be in the state of cooking congee.R1 constantly heats along with heat-generating disc, the temperature of the second temperature controller T1 also can constantly rise, when temperature reaches its operating temperature (about 90 degrees centigrade to 95 degrees centigrade), the second temperature controller T1 disconnects, then heat-generating disc R1 stops heating, and heat-generating disc R6 continues heating, and electric cooker is in the small-power heated condition, make the food of pot in pot body keep boiling, the The whole control circuit still is in the state of cooking congee.
R6 constantly heats along with heat-generating disc, the temperature of food can constantly rise in the interior pot, the temperature of pot in the temperature controller T induction, the temperature of temperature controller T also can constantly rise, when temperature reaches its operating temperature (about 145 ± 5 degrees centigrade), temperature controller T disconnects, electromagnetic relay G outage, then electromagnetic force disappears, so the movable contact 1 of electromagnetic relay G disconnects with normally opened contact 3, under the effect of electromagnetic relay spring, make movable contact 1 and normally-closed contact 2 connect, and then the indicator lamp DX3 that cooks congee is extinguished, and make insulation indicator lamp DX2 luminous once more, at this moment, electric cooker enters keeping warm mode automatically, finishes the process of cooking congee.
Fig. 6 shows the circuit diagram according to the control circuit that is used for electric cooker of the utility model the 3rd preferred embodiment, compare with preferred embodiment shown in Figure 4, this control circuit also comprises: the second temperature controller T1, its first end links to each other with first end of gauge tap K1, and second end links to each other with first end of first heating unit 30; Second heating unit 60 comprises diode in series D1 and heat-generating disc R6, and its first end by diode D1 links to each other with the second stationary contact conjee of the K3 of menu unit, links to each other with first end of parallel branch by heat-generating disc R6; The K3 of menu unit, it is the SP3T switch, and its movable contact 1 links to each other with first end of gauge tap K1, and its first stationary contact cook links to each other with first end of first heating unit 30, and its 3rd stationary contact braise links to each other with second end of diode D1.
Compare with first preferred embodiment shown in Figure 4, this preferred embodiment also provides the function of cooking congee with boiling, makes that the function of electric cooker is more complete.Wherein, the effect of diode D1 is identical with diode action in the preferred embodiment shown in Figure 5, when selecting to cook congee, is the effect that the power that makes heat-generating disc R6 reduces by half.
Compare with Fig. 4, in control circuit shown in Figure 6, increased: the second temperature controller T1 (operating temperature is 90 degrees centigrade to 95 degrees centigrade, and recovery temperature is 50 degrees centigrade), connect with heat-generating disc R1 (high-power); The series arm of heat-generating disc R6 (small-power) and diode D1 is further connected with the series arm of the resistance R 3 and the indicator lamp DX1 that cooks; And functional select switch K3 (being menu unit).
As shown in Figure 6, when the second stationary contact cook of functional select switch K3 connects (selecting rice-cooking function), the operation principle of this circuit is identical with the operation principle of control circuit shown in Figure 4, it should be noted that, after pushing gauge tap K1, because the resistance of R3 is much larger than R6, so the indicator lamp DX1 that only cooks is bright; And when the second stationary contact conjee of functional select switch K3 connects (selecting gruel boiling function), the operation principle of this circuit is identical with the operation principle of control circuit shown in Figure 5, repeats no more herein; When the 3rd stationary contact braise of functional select switch K3 connects (selecting cooking function), the operation principle of this circuit is as follows:
When the alternating voltage of 220V is connected at the two ends of power supply, thermal circuit is a path, therefore warming plate R2 energising produces heat, simultaneously, electric current also can pass through resistance R 4 and insulation indicator lamp DX2 via the normally closed switch of electromagnetic relay G, make that insulation indicator lamp DX2 is luminous, indicate this control circuit to be in keeping warm mode at this moment.
When pushing gauge tap K1 (moving together contact), make that the boiling circuit is a path, then electric current is by heat-generating disc R1 and R6, and heat-generating disc R1 and R6 generate heat; Equally, electric current also can pass through resistance R 3 and DX1, makes DX1 luminous; Simultaneously, electric current also can pass through temperature controller T and electromagnetic relay G coil, because electromagnetic induction produces electromagnetic force, make the movable contact 1 of electromagnetic relay G connect with normally opened contact 3, and disconnect with normally-closed contact 2, thereby make insulation indicator lamp DX2 outage, at this moment, it is luminous having only DX1 in this control circuit, and it indicates this control circuit to be in the boiling state.R1 constantly heats along with heat-generating disc, the temperature of the second temperature controller T1 also can constantly rise, when temperature reaches its operating temperature (about 90 degrees centigrade to 95 degrees centigrade), the disconnection of the second temperature controller T1, then heat-generating disc R1 stops heating, and heat-generating disc R6 continues heating, and the The whole control circuit still is in the boiling state.
R6 constantly heats along with heat-generating disc, the temperature of food can constantly rise in the interior pot, the temperature of pot in the temperature controller T induction, the temperature of temperature controller T also can constantly rise, when temperature reaches its operating temperature (about 145 ± 5 degrees centigrade), the disconnection of temperature controller T, electromagnetic relay G outage, then electromagnetic force disappears, and makes the movable contact 1 of electromagnetic relay G and normally opened contact 3 disconnect, under the effect of electromagnetic relay spring, make movable contact 1 and normally-closed contact 2 connect, and then DX1 is extinguished, and make insulation indicator lamp DX2 luminous once more, at this moment, electric cooker enters keeping warm mode automatically, finishes digestion process.When selecting different functions, when boiling, has different power.
A kind of electric cooker also is provided in embodiment of the present utility model, and it has the control circuit shown in Fig. 3 to Fig. 5 preferred embodiment.Like this, electric cooker can be more accurate when realization is cooked and is incubated, and stability is higher.
The electric cooker of the preferred embodiment is owing to adopt the control circuit of above preferred embodiment, movable components such as lever, lever dolly, magnetic steel temperature limiter, lever button, turning cylinder and support, hold-down screw have been saved, the connecting and disconnecting of the circuit control structure of electric cooker is simple, has also reduced when reducing cost because of the movable dumb malfunction that produces of the parts of need activity.
In addition, the assembling that can save movable parts such as lever with produce debugging, cooking of having avoided causing because of lever is stuck in the electric cooker use is not yet done, overcooked rice, microswitch are not in place, the microswitch short circuit, heat-generating disc does not generate heat and problem such as heat-generating disc scorification.Owing to removed the magnet steel lever construction, save the space of bottom, pot end, and then can increase the capacity of interior pot, hold more food.
From above description, as can be seen, the utility model the above embodiments have realized following technique effect: because adopt alternating current electromagnetic relay to control cooking of electric cooker and insulating process, solve the connecting and disconnecting of the circuit control structure more complicated of the electric cooker of prior art, the problem that cost is high, thereby parts such as magnetic steel temperature limiter, lever, microswitch, rotating shaft have been saved, the connecting and disconnecting of the circuit control structure of electric cooker is simple, reduced the cost of electric cooker, and reduced because of the movable dumb malfunction that produces of the parts of need activity.
In addition, the preferred embodiment makes electric cooker that multiple function (as cook, cook congee and boiling) can be provided by menu unit is set, and makes that the function of electric cooker is more complete.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. a control circuit that is used for electric cooker is characterized in that, comprising: power supply, heat-insulation unit, first heating unit, alternating current electromagnetic relay and the gauge tap K1 and the temperature controller T that control described alternating current electromagnetic relay, wherein
Described gauge tap K1 connects with described first heating unit by first end and forms series arm;
Described power supply, described heat-insulation unit and the described series arm parallel branch that forms in parallel;
First end of the coil of described alternating current electromagnetic relay links to each other with first end of described gauge tap K1 by described temperature controller T, second end of its coil links to each other with first end of described parallel branch, its normally opened contact links to each other with first end of described gauge tap K1, and its movable contact links to each other with second end of described parallel branch.
2. the control circuit that is used for electric cooker according to claim 1 is characterized in that, moving the run pass of described gauge tap K1 for often opening.
3. the control circuit that is used for electric cooker according to claim 2 is characterized in that, also comprises:
Gauge tap K2, its first end links to each other with the normally opened contact of described alternating current electromagnetic relay, and second end links to each other with first end of described gauge tap K1, and described gauge tap K2 is that normally closed moving disconnection is closed.
4. the control circuit that is used for electric cooker according to claim 3 is characterized in that, also comprises:
The insulation indicator unit, its first end links to each other with the normally-closed contact of described alternating current electromagnetic relay, and second end links to each other with first end of described parallel branch; The indicator unit of cooking, it is in parallel with described first heating unit.
5. the control circuit that is used for electric cooker according to claim 4 is characterized in that, described insulation indicator unit comprises the insulation indicator lamp and first resistance of series connection, and the described indicator unit of cooking comprises the cook indicator lamp and second resistance of series connection.
6. the control circuit that is used for electric cooker according to claim 5 is characterized in that, also comprises:
The second temperature controller T1, its first end links to each other with first end of described gauge tap K1, and second end links to each other with first end of described first heating unit;
Second heating unit, it is connected with the described indicator unit of cooking by first end;
Menu unit, its movable contact links to each other with first end of described gauge tap K1, and its first stationary contact links to each other with first end of described first heating unit, and its second stationary contact links to each other with first end of described second heating unit.
7. the control circuit that is used for electric cooker according to claim 6 is characterized in that, also comprises:
The indicator unit of cooking congee, it is in parallel with described second heating unit.
8. the control circuit that is used for electric cooker according to claim 7 is characterized in that, described menu unit is a single-pole double-throw switch (SPDT);
Described second heating unit comprises diode in series and heat-generating disc R6;
The described indicator unit of cooking congee comprises the cook congee indicator lamp and the 3rd resistance of series connection.
9. the control circuit that is used for electric cooker according to claim 5 is characterized in that, also comprises:
The second temperature controller T1, its first end links to each other with first end of described gauge tap K1, and second end links to each other with first end of described first heating unit;
Second heating unit comprises diode in series and heat-generating disc R6, and its first end by described diode links to each other with second stationary contact of menu unit, links to each other with first end of described parallel branch by described heat-generating disc R6;
Described menu unit, it is the SP3T switch, and its movable contact links to each other with first end of described gauge tap K1, and its first stationary contact links to each other with first end of described first heating unit, and its 3rd stationary contact links to each other with second end of described diode.
10. an electric cooker is characterized in that, has according to each described control circuit in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200038732U CN201341795Y (en) | 2009-02-17 | 2009-02-17 | Rice cooker and control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200038732U CN201341795Y (en) | 2009-02-17 | 2009-02-17 | Rice cooker and control circuit thereof |
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| Publication Number | Publication Date |
|---|---|
| CN201341795Y true CN201341795Y (en) | 2009-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200038732U Expired - Lifetime CN201341795Y (en) | 2009-02-17 | 2009-02-17 | Rice cooker and control circuit thereof |
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| Country | Link |
|---|---|
| CN (1) | CN201341795Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622005A (en) * | 2011-01-29 | 2012-08-01 | 珠海格力电器股份有限公司 | Electric rice cooker control circuit |
| CN107348833A (en) * | 2017-08-08 | 2017-11-17 | 广东美想电器有限公司 | A kind of electric cooker |
| CN109032206A (en) * | 2018-08-07 | 2018-12-18 | 中国原子能科学研究院 | A kind of automatic temperature-controlled circuit based on jump type temperature switch |
| CN113384160A (en) * | 2021-07-14 | 2021-09-14 | 小熊电器股份有限公司 | Power adjusting circuit, power adjusting method and electric chafing dish |
-
2009
- 2009-02-17 CN CNU2009200038732U patent/CN201341795Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622005A (en) * | 2011-01-29 | 2012-08-01 | 珠海格力电器股份有限公司 | Electric rice cooker control circuit |
| CN102622005B (en) * | 2011-01-29 | 2015-03-04 | 珠海格力电器股份有限公司 | Electric rice cooker control circuit |
| CN107348833A (en) * | 2017-08-08 | 2017-11-17 | 广东美想电器有限公司 | A kind of electric cooker |
| CN109032206A (en) * | 2018-08-07 | 2018-12-18 | 中国原子能科学研究院 | A kind of automatic temperature-controlled circuit based on jump type temperature switch |
| CN113384160A (en) * | 2021-07-14 | 2021-09-14 | 小熊电器股份有限公司 | Power adjusting circuit, power adjusting method and electric chafing dish |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091111 |