CN205263679U - A equipment and electric rice cooker for controlling electric rice cooker water heating temperature - Google Patents
A equipment and electric rice cooker for controlling electric rice cooker water heating temperature Download PDFInfo
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- CN205263679U CN205263679U CN201521100937.2U CN201521100937U CN205263679U CN 205263679 U CN205263679 U CN 205263679U CN 201521100937 U CN201521100937 U CN 201521100937U CN 205263679 U CN205263679 U CN 205263679U
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- heater
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Abstract
The utility model discloses an equipment and electric rice cooker for controlling electric rice cooker water heating temperature. Wherein, this equipment includes: temperature sensor for gather electric rice cooker's gas outlet temperature, the temperature generater for output expression base temperature's signal, the comparator is connected with temperature sensor for relatively gas outlet temperature and base temperature generate switch triggering signal based on the comparative result, the switching element is respectively with comparator and electric rice cooker's heater connection for the heater is switched on or turn -offed under triggering signal's of the triggering. Through the utility model discloses, the technical problem that the boiling water of having solved present electric rice cooker easily overflows reaches the electric rice cooker's of protection the bottom heater and the purpose of other devices, lengthens electric rice cooker's life.
Description
Technical field
The utility model relates to electric cooker field, heats establishing of water temperature in particular to a kind of for controlling electric cookerStandby and electric cooker.
Background technology
Existing in the industry for consumers in general's mechanical electric cooker, all adopt 220V alternating current to be directly operated in and send outHeat dish is upper, and the method for heat-generating disc center mounting temperature sensor (top is attached to pan bottom) detects kettle temperature. MakeIn the process of cooking with traditional mechanical electric cooker, along with the rising of kettle temperature, the water in pot seethes with excitement gradually,Will cause boiling water to overflow, and the phenomenon that this boiled water is overflowed will be served heat-generating disc and pan bottom device bandDrawback, if boiling water is overflowed not in time and processed, can send burning very soon while reusing this electric cooker; In addition,Due to long boiling water spillover, can cause damage to heat-generating disc and pan bottom device.
The problem of easily overflowing for the boiling water of existing electric cooker, not yet proposes effective solution at present.
Utility model content
It is a kind of for controlling equipment and the electric cooker of electric cooker heating water temperature that the utility model embodiment provides, with at leastSolve the technical problem that the boiling water of existing electric cooker easily overflows.
According to the utility model embodiment aspect, provide a kind of for controlling the equipment of electric cooker heating water temperature,This equipment comprises: temperature sensor, for gathering the air outlet temperature of electric cooker; Temperature maker, for exporting tableShow the signal of fiducial temperature; Comparator, is connected with described temperature sensor, for more described air outlet temperature and instituteState fiducial temperature, result generates switch triggering signal based on the comparison; Switching device, respectively with described comparator and described inThe heater of electric cooker connects, for conducting under the triggering of described triggering signal or turn-off described heater.
Further, described temperature sensor comprises: dc source; Thermistor, first end and described dc sourceConnect; Divider resistance, the second end of first end and described thermistor is connected in node A, the second end ground connection; DescribedThe input P of comparator is connected with described node A, and described input P receives for representing described air outlet temperatureVoltage signal.
Further, described thermistor is: negative temperature coefficient NTC resistance.
Further, described temperature maker comprises: dc source; The first resistance, first end and described dc sourceConnect; The second resistance, the second end of first end and described the first resistance is connected in Node B, the second end ground connection; DescribedThe input Q of comparator is connected with described Node B, and described input Q receives the voltage that represents described fiducial temperatureSignal.
Further, described switching device comprises: relay, wherein, the first contact of described relay and described ratioConnect compared with the signal output interface of device; The second contact of described relay is connected with a utmost point of AC power; Described relayThe 3rd contact of device is connected with one end of described heater, another of the other end of described heater and described AC powerThe utmost point connects.
Further, described heater comprises: heat-generating disc.
Further, described equipment also comprises: thermal fuse-link, is arranged on the 3rd contact and the described friendship of described relayBetween another utmost point of stream power supply.
Further, described comparator is hysteresis comparator.
Further, described equipment also comprises: electric pressure converter, is connected with described hysteresis comparator, for exchangingThe voltage transitions of power supply is the supply voltage of described hysteresis comparator.
According to the utility model embodiment on the other hand, also provide a kind of electric cooker, this electric cooker comprises above-mentionedFor controlling the equipment of electric cooker heating water temperature.
In the utility model embodiment, the air outlet temperature of comparator by electric cooker relatively seethes with excitement with water temp. heatingThe size of fiducial temperature, generates the also triggering signal of output control switch device, utilizes opening and turn-offing of switching deviceRealize conducting and the shutoff of heater in electric cooker. Particularly, when the water temperature in electric cooker reaches fiducial temperature, andTime disconnect heater, when the water in electric cooker does not overflow, just disconnect heater yet, and use the remaining Wen Ji of heaterContinuous heating disconnected in time heater before the water of electric cooker not yet overflows by this scheme, make boiling in electric cookerWater can not overflow, and has solved the problem that in prior art, the boiling water in electric cooker easily overflows.
Brief description of the drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part,Schematic description and description of the present utility model is used for explaining the utility model, does not form of the present utility modelImproper restriction. In the accompanying drawings:
Fig. 1 is a kind of schematic diagram that heats the equipment of water temperature for controlling electric cooker according to the utility model embodiment;
Fig. 2 is a kind of optionally for controlling the showing of equipment of electric cooker heating water temperature according to the utility model embodimentIntention.
Detailed description of the invention
In order to make those skilled in the art person understand better the utility model scheme, real below in conjunction with the utility modelExecute the accompanying drawing in example, the technical scheme in the utility model embodiment is clearly and completely described, obviously, instituteThe embodiment describing is only the embodiment of the utility model part, instead of whole embodiment. Based on this practicalityEmbodiment in novel, those of ordinary skill in the art do not make under creative work prerequisite, obtain all itsHis embodiment, should belong to the scope of the utility model protection.
It should be noted that, term " first " in description of the present utility model and claims and above-mentioned accompanying drawing," second " etc. is for distinguishing similar object, and needn't be used for describing specific order or precedence. Should manageSeparate the data that use like this suitably exchanging in situation, so that embodiment of the present utility model described herein canWith except diagram here or describe those order enforcement. In addition, term " comprise " and " having " withAnd their any distortion, intention is to cover not exclusive comprising, for example, the process that comprised a series of unit,,Those unit that system, product or equipment are not necessarily limited to clearly list, but can comprise clearly do not list orFor other intrinsic unit of these processes, product or equipment.
Fig. 1 is a kind of schematic diagram that heats the equipment of water temperature for controlling electric cooker according to the utility model embodiment,As shown in Figure 1, this equipment comprises: temperature sensor 11, temperature maker 13, comparator 15 and switching device17。
Wherein, temperature sensor 11, for gathering the air outlet temperature of electric cooker.
Temperature maker 13, for exporting the signal that represents fiducial temperature.
Comparator 15, is connected with temperature sensor, for comparing air outlet temperature and fiducial temperature, based on the comparison resultGenerate switch triggering signal.
Switching device 17, is connected with the heater 19 of comparator and electric cooker respectively, for the triggering in triggering signalLower conducting or shutoff heater.
Adopt the utility model embodiment, the air outlet temperature of comparator by electric cooker relatively seethes with excitement with water temp. heatingThe size of fiducial temperature, generates the also triggering signal of output control switch device, utilizes opening and turn-offing of switching deviceRealize conducting and the shutoff of heater in electric cooker. Particularly, when the water temperature in electric cooker reaches fiducial temperature, andTime disconnect heater, when the water in electric cooker does not overflow, just disconnect heater yet, and use the remaining Wen Ji of heaterContinuous heating disconnected in time heater before the water of electric cooker not yet overflows by this scheme, make boiling in electric cookerWater can not overflow, and has solved the problem that in prior art, the boiling water in electric cooker easily overflows.
Further, in such scheme, when the water temperature in electric cooker reaches fiducial temperature, disconnect heater, makeWith the remaining temperature heating of heater, along with the waste heat supply temperature of heater reduces gradually, the heating function of heater weakens gradually,Water temperature in electric cooker also can reduce, if the air outlet temperature collecting during lower than fiducial temperature, conducting heater again,By the turn-on and turn-off heater that circulates successively, can be avoiding water in electric cooker to seethe with excitement and heater is also addingWhen heat and boiling water overflow, normally realize the function of electric cooker, reach the bottom heater of protection electric cooker and otherThe object of device, the service life of prolongation electric cooker.
By above-described embodiment, use comparator to reach the effect that prevents that boiling water from overflowing, do not need service routine, do not needConsider the type selecting of master chip, can be cost-saving, and can reduce the program mal rate of electric cooker.
Wherein, the water boiling that what above-mentioned fiducial temperature represented is in electric cooker, and gas outlet while not overflowing gas outletTemperature.
Particularly, be arranged on the temperature sensor of gas outlet, electric cooker top, the air outlet temperature detecting is anti-in real timeBe fed to comparator, comparator, by comparing the air outlet temperature of electric cooker and the size of fiducial temperature, is worked as air outlet temperatureWhile reaching this fiducial temperature, the possibility that the water in electric cooker seethes with excitement, has water to overflow simultaneously, one of comparator outputLow level signal, this low level signal is for disconnecting the heater of electric cooker, and this low level signal trigger switch device is disconnectedOpen, so that heater power-off; If air outlet temperature does not reach this fiducial temperature, what electric cooker did not temporarily have that water overflows canCan, comparator output high level signal, this high level signal is for the heater of electric conduction rice cooker, this high level signalTrigger switch break-over of device, so that heater energising.
As shown in Figure 2, above-mentioned temperature sensor 11 can comprise: dc source VCC; Thermistor Rt, theOne end is connected with dc source; Divider resistance Rx, the second end of first end and thermistor is connected in node A, secondEnd ground connection; The input P of comparator is connected with node A, and input P receives the voltage for representing air outlet temperatureSignal.
Above-mentioned thermistor can be: negative temperature coefficient NTC (NegativeTemperatureCoefficient, contractingWrite NTC) resistance.
Particularly, along with the continuous rising of the air outlet temperature of the electric cooker detecting, the resistance of thermistor subtracts graduallyLittle. Known to the circuit analysis in Fig. 2, through the dividing potential drop effect of divider resistance Rx, the magnitude of voltage at node A place isVA＝[Rx/(Rt+Rx)] * VCC, the magnitude of voltage that the input P of comparator is ordered is VA, utilize this magnitude of voltage to represent electricityThe air outlet temperature of rice cooker.
Particularly, because thermistor and divider resistance are connected in the loop of this detection air outlet temperature, can utilizeThe dividing potential drop effect of thermistor and divider resistance, represents this with the voltage that thermistor and divider resistance connected node A are orderedAir outlet temperature, and by the input of an input of device as a comparison of this voltage, with according to the current state of electric cookerThe work of control heater.
In above-described embodiment, utilize the negative temperature coefficient function of thermistor, can accurately reflect air outlet temperature; AndAnd by the dividing potential drop effect of thermistor and divider resistance, get final product Obtaining Accurate electric cooker air outlet temperature, circuit structureSimple and reliable, reduce testing cost.
As shown in Figure 2, above-mentioned temperature maker 13 comprises: dc source VCC; The first resistance R 1, first endBe connected with dc source; The second resistance R 2, the second end of first end and the first resistance is connected in Node B, the second terminationGround; The input Q of comparator is connected with Node B, and input Q receives the voltage signal that represents fiducial temperature.
Particularly, known to the circuit analysis in Fig. 2, the magnitude of voltage at Node B place is VB＝[R2/(R1+R2)]*VCC，By selecting the resistance of the first resistance and the resistance of the second resistance, can determine VBSize, i.e. the input of comparatorThe magnitude of voltage that Q is ordered, utilizes this magnitude of voltage to represent the fiducial temperature of boiling water in electric cooker, wherein, this fiducial temperature withThe normal working temperature correspondence of NTC resistance.
By above-described embodiment, by the dividing potential drop effect of the first resistance and the second resistance, can obtain for representing electric mealThe voltage signal of the fiducial temperature of boiling water in pot pot, circuit structure is simple and reliable, has reduced testing cost.
In above-described embodiment of the present utility model, switching device can comprise: relay, wherein, of relayOne contact is connected with the signal output interface of comparator; The second contact of relay is connected with a utmost point of AC power; ContinueThe 3rd contact of electrical equipment is connected with one end of heater, and the other end of heater is connected with another utmost point of AC power.
Above-mentioned heater can comprise: heat-generating disc.
Particularly, the magnitude of voltage that the input P of comparator is ordered represents the air outlet temperature of electric cooker, the Q point of comparatorMagnitude of voltage represent by comparator, two magnitudes of voltage to be compared the fiducial temperature of boiling water in electric cooker, and defeatedGo out comparative result. When the magnitude of voltage of ordering as P is less than the magnitude of voltage that Q orders, the air outlet temperature of electric cooker is lower than benchmarkTemperature, comparator output high level, relay conducting, i.e. the heat-generating disc of electric cooker energising, heat-generating disc is electric cookerThe bottom of a pan heating, along with the carrying out of heating, the interior water temperature rising of pot simultaneously air outlet temperature is also synchronously risen; When electric cookerAir outlet temperature is during higher than fiducial temperature, and the magnitude of voltage that P is ordered is greater than the magnitude of voltage that Q is ordered, comparator output low level,Relay disconnects, i.e. the heat-generating disc power-off of electric cooker, and then heat-generating disc is that heating is continued in the bottom of a pan with the waste heat of itself,But along with heating is carried out, the waste heat supply temperature of heat-generating disc itself reduces gradually, cause the bottom of a pan heating-up temperature to reduce, in potBoiled water temperature also reduces gradually, and air outlet temperature reduces gradually, in the time that air outlet temperature is reduced to fiducial temperature, thanThink highly of new output high level, relay is conducting again, and heat-generating disc is switched on again, and heat-generating disc is that heating is continued in the bottom of a pan.Circulation successively, relay is constantly connected and is turn-offed, i.e. and constantly energising and power-off of heat-generating disc, until the work knot of cookingBundle, thus reach the effect that prevents that boiling water from overflowing.
In the above-described embodiments, conducting and the shutoff of the output signal control relay by comparator, utilize relayEnergising and the power-off of heater of break-make control electric cooker, the heating-up temperature with control heater to the bottom of a pan, thus keep awayExempt from heater boiling water in pot is heated always, cause the phenomenon that boiling water overflows to occur.
As shown in Figure 2, this equipment can also comprise: thermal fuse-link 12, the 3rd contact that is arranged on relay with exchangeBetween another utmost point of power supply.
Particularly, as shown in Figure 2, civil power 220V alternating voltage is by zero line N and live wire L input, zero line and heatOne end of fuse-link connects, and the other end of thermal fuse-link is connected with one end of heater, and alternating voltage passes through thermal fuse-linkFor the heater of electric cooker provides operating voltage.
In this circuit, thermal fuse-link plays the effect of overcurrent protection.
Above-mentioned comparator can be hysteresis comparator.
As shown in Figure 2, this equipment can also comprise: electric pressure converter 14, is connected with hysteresis comparator, for handing overThe supply voltage that the voltage transitions of stream power supply is hysteresis comparator.
Particularly, by electric pressure converter, civil power 220V alternating voltage being converted to the DC voltage of 5V, is comparatorOperating voltage is provided. In addition, as shown in Figure 2, electric pressure converter and comparator be (GND) altogether.
Alternatively, electric pressure converter can be adapter, and adapter can directly be selected outsourcing, also can establish voluntarilyMeter.
By above-described embodiment, the utility model is by controlling the break-make of heat-generating disc, controls boiling water spillover,And the break-make of heat-generating disc is to utilize the feedback temperature of head temperature sensor and coordinating of comparator of electric cooker, make comparisonDevice output low and high level, comes by this low and high level that the break-make of gauge tap device (as relay) realizes, andBreak-make by this scheme control heat-generating disc is effective, has reached the effect that prevents that boiling water from overflowing, thereby has reduced when longBetween spilling water damage that electric cooker bottom heater and other devices are brought, increased service life of electric cooker.
According to the utility model embodiment on the other hand, also provide a kind of electric cooker, this electric cooker comprises above-mentionedFor controlling the equipment of electric cooker heating water temperature.
Adopt the utility model embodiment, the air outlet temperature of comparator by electric cooker relatively seethes with excitement with water temp. heatingThe size of fiducial temperature, generates the also triggering signal of output control switch device, utilizes opening and turn-offing of switching deviceRealize conducting and the shutoff of heater in electric cooker. Particularly, when the water temperature in electric cooker reaches fiducial temperature, andTime disconnect heater, when the water in electric cooker does not overflow, just disconnect heater yet, and use the remaining Wen Ji of heaterContinuous heating disconnected in time heater before the water of electric cooker not yet overflows by this scheme, make boiling in electric cookerWater can not overflow, and has solved the problem that in prior art, the boiling water in electric cooker easily overflows.
By above-described embodiment, use comparator to reach the effect that prevents that boiling water from overflowing, do not need service routine, do not needConsider the type selecting of master chip, can be cost-saving, and can reduce the program mal rate of electric cooker.
Wherein, the water boiling that what above-mentioned fiducial temperature represented is in electric cooker, and gas outlet while not overflowing gas outletTemperature.
Particularly, be arranged on the temperature sensor of gas outlet, electric cooker top, the air outlet temperature detecting is anti-in real timeBe fed to comparator, comparator, by comparing the air outlet temperature of electric cooker and the size of fiducial temperature, is worked as air outlet temperatureWhile reaching this fiducial temperature, the possibility that the water in electric cooker seethes with excitement, has water to overflow simultaneously, one of comparator outputLow level signal, this low level signal is for disconnecting the heater of electric cooker, and this low level signal trigger switch device is disconnectedOpen, so that heater power-off; If air outlet temperature does not reach this fiducial temperature, what electric cooker did not temporarily have that water overflows canCan, comparator output high level signal, this high level signal is for the heater of electric conduction rice cooker, this high level signalTrigger switch break-over of device, so that heater energising.
Above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
In above-described embodiment of the present utility model, the description of each embodiment is all emphasized particularly on different fields, in certain embodimentThere is no the part describing in detail, can be referring to the associated description of other embodiment.
In addition, the each functional unit in each embodiment of the utility model can be integrated in a processing unit, alsoCan be that the independent physics of unit exists, also can be integrated in a unit two or more unit. Above-mentionedIntegrated unit both can adopt the form of hardware to realize, and also can adopt the form of SFU software functional unit to realize.
The claimed equipment of the utility model and each assembly that forms this equipment be all one have definite shape,Construct and occupy the entity products of certain space. As temperature sensor can be realized by resistance element, comparatorCan be by realizing with the electronic device such as door, not gate, resistance and amplifier.
The above is only preferred embodiment of the present utility model, it should be pointed out that the common skill for the artArt personnel, not departing under the prerequisite of the utility model principle, can also make some improvements and modifications, theseImprovements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. for controlling an equipment for electric cooker heating water temperature, it is characterized in that, comprising:
Temperature sensor, for gathering the air outlet temperature of electric cooker;
Temperature maker, for exporting the signal that represents fiducial temperature;
Comparator, is connected with described temperature sensor, for more described air outlet temperature and described fiducial temperature,Result generates switch triggering signal based on the comparison;
Switching device, is connected with the heater of described comparator and described electric cooker respectively, in described triggeringConducting or turn-off described heater under the triggering of signal.
2. equipment according to claim 1, is characterized in that, described temperature sensor comprises:
Dc source;
Thermistor, first end is connected with described dc source;
Divider resistance, the second end of first end and described thermistor is connected in node A, the second end ground connection;
The input P of described comparator is connected with described node A, described in described input P reception is used for representingThe voltage signal of air outlet temperature.
3. equipment according to claim 2, is characterized in that, described thermistor is: negative temperature coefficient NTC electricityResistance.
4. equipment according to claim 1, is characterized in that, described temperature maker comprises:
Dc source;
The first resistance, first end is connected with described dc source;
The second resistance, the second end of first end and described the first resistance is connected in Node B, the second end ground connection;
The input Q of described comparator is connected with described Node B, and described input Q receives and represents described benchmarkThe voltage signal of temperature.
5. according to the equipment described in any one in claim 1 to 4, it is characterized in that, described switching device comprises:Relay, wherein,
The first contact of described relay is connected with the signal output interface of described comparator;
The second contact of described relay is connected with a utmost point of AC power;
The 3rd contact of described relay is connected with one end of described heater, the other end of described heater and instituteAnother utmost point of stating AC power connects.
6. equipment according to claim 5, is characterized in that, described heater comprises: heat-generating disc.
7. according to the equipment described in claim 6, it is characterized in that, described equipment also comprises:
Thermal fuse-link, is arranged between the 3rd contact and another utmost point of described AC power of described relay.
8. according to the equipment described in any one in claim 1 to 4, it is characterized in that, described comparator is the ratio that lags behindCompared with device.
9. equipment according to claim 8, is characterized in that, described equipment also comprises:
Electric pressure converter, is connected with described hysteresis comparator, for being described stagnant by the voltage transitions of AC powerThe supply voltage of rear comparator.
10. an electric cooker, is characterized in that, comprise in claim 1 to 9 described in any one for controlling electric mealThe equipment of pot heating water temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521100937.2U CN205263679U (en) | 2015-12-23 | 2015-12-23 | A equipment and electric rice cooker for controlling electric rice cooker water heating temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521100937.2U CN205263679U (en) | 2015-12-23 | 2015-12-23 | A equipment and electric rice cooker for controlling electric rice cooker water heating temperature |
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| Publication Number | Publication Date |
|---|---|
| CN205263679U true CN205263679U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521100937.2U Expired - Fee Related CN205263679U (en) | 2015-12-23 | 2015-12-23 | A equipment and electric rice cooker for controlling electric rice cooker water heating temperature |
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| Country | Link |
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| CN (1) | CN205263679U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106909187A (en) * | 2015-12-23 | 2017-06-30 | 珠海格力电器股份有限公司 | For controlling electric cooker to heat equipment, control method and the device of water temperature |
-
2015
- 2015-12-23 CN CN201521100937.2U patent/CN205263679U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106909187A (en) * | 2015-12-23 | 2017-06-30 | 珠海格力电器股份有限公司 | For controlling electric cooker to heat equipment, control method and the device of water temperature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 Termination date: 20211223 |