CN109028172A - A kind of electric furnace and its method preventing edible oil spontaneous combustion in culinary art using temperature control - Google Patents
A kind of electric furnace and its method preventing edible oil spontaneous combustion in culinary art using temperature control Download PDFInfo
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- CN109028172A CN109028172A CN201810584331.2A CN201810584331A CN109028172A CN 109028172 A CN109028172 A CN 109028172A CN 201810584331 A CN201810584331 A CN 201810584331A CN 109028172 A CN109028172 A CN 109028172A
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- 239000008157 edible vegetable oil Substances 0.000 title claims abstract description 106
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 27
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011521 glass Substances 0.000 claims abstract description 131
- 238000005259 measurement Methods 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims description 27
- 238000010411 cooking Methods 0.000 claims description 26
- 239000000523 sample Substances 0.000 claims description 25
- 239000000919 ceramic Substances 0.000 claims description 24
- 239000003921 oil Substances 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 19
- 230000005855 radiation Effects 0.000 claims description 10
- 206010037660 Pyrexia Diseases 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 206010053615 Thermal burn Diseases 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 241001640117 Callaeum Species 0.000 claims 1
- 230000001965 increasing effect Effects 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000012546 transfer Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 239000000077 insect repellent Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000001535 kindling effect Effects 0.000 description 2
- KJBWWVTTZNVMKW-LPYMAVHISA-N 1-(dipyridin-2-ylmethylideneamino)-3-[(E)-(2-hydroxyphenyl)methylideneamino]thiourea Chemical compound Oc1ccccc1\C=N\N\C([S-])=[NH+]/N=C(c1ccccn1)c1ccccn1 KJBWWVTTZNVMKW-LPYMAVHISA-N 0.000 description 1
- 208000000044 Amnesia Diseases 0.000 description 1
- 208000031091 Amnestic disease Diseases 0.000 description 1
- 230000018199 S phase Effects 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006986 amnesia Effects 0.000 description 1
- 210000002583 cell-derived microparticle Anatomy 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
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- 239000013081 microcrystal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/06—Arrangement or mounting of electric heating elements
- F24C7/067—Arrangement or mounting of electric heating elements on ranges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electric Stoves And Ranges (AREA)
- Control Of Resistance Heating (AREA)
- Frying-Pans Or Fryers (AREA)
Abstract
A kind of electric furnace and its method preventing edible oil spontaneous combustion in culinary art using temperature control.The method and its electric furnace of edible oil spontaneous combustion in culinary art are prevented by controlling Heating Zone Temperature the invention discloses a kind of.The electric furnace includes at least one block of glass, at least one heat source under glass, each heat source further includes a temperature sensor and a control unit, the wherein temperature of temperature sensor measurement heating zone Glass base, control unit and heat source are electrically connected, and the temperature of measurement is compared with preset temperature bound, then the output power of heat source is decreased or increased, the maximum temperature of the edible oil in cooker may be limited to edible oil self-ignition point hereinafter, and the minimum temperature of edible oil cooks performance required for can still meeting accordingly.Preset temperature bound is determined by the corresponding relationship of the edible oil temperature in Heating Zone Temperature and cooker.
Description
Technical field
The present invention relates to the electric furnaces with temperature limiting control function, especially the electric furnace containing glass panel heating, lead to
The maximum temperature of limitation glass hot zone is crossed, to prevent edible oil spontaneous combustion during the cooking process, while still being able to provide and cook
Minimum oil temperature needed for performance of preparing food.
Background technique
It is unserviced culinary art in the main reason for many countries, cooking fire.When people at home, student dormitory,
When the local cooking food such as apartment for elderly people, hotel suites with kitchen, due to careless, amnesia or lack the meaning of safe cuisinary
Know, the cooker equipped with edible oil left on the hot zone of electric furnace, and since the temperature of hot zone can be increased to 650 DEG C,
Its self-ignition point for being much higher than edible oil, usually 360 DEG C to 400 DEG C, the edible oil stayed on hot zone for a long time understands high temperature certainly
Combustion.
Cooking fire and smog can cause a large amount of preventible dead, personal injury and property loss every year.Therefore, prevent
Only culinary art in edible oil kindling for individual, housing management company, insurance company, fire department, cooking equipment manufacturer and
It is highly important for government.Safety problem brought by edible oil kindling gradually attracts people's attention in culinary art.For example,
Since 2015, UL858 (UL electric heater safety standard) required that UL858 must be passed through using the electric furnace of mosquito-repellent incense pipe heat-generating disc
60A mosquito-repellent incense pipe heat-generating disc edible oil autoignition test.According to UL858 60A test request, the pot equipped with edible oil is placed on mosquito-repellent incense
The surface of pipe heat-generating disc, electric furnace should be able to heat 30 minutes without causing edible oil spontaneous combustion under peak power setting.This
New safety standard is only applied to the electric furnace using mosquito-repellent incense pipe heat-generating disc at present, and for such electric furnace, factory
Some solutions have been provided in family.However, kitchen range manufacturer is not provided in other electric furnaces, especially with glass
The solution for effectivelying prevent edible oil spontaneous combustion on the electric furnace of plate, therefore UL and other safety standards are not yet required in other electricity
Applying on furnace prevents edible oil spontaneous combustion.
In every two sets of electric furnace of North America sale, just there is a set of glass plate electric furnace.This electric cooker structure is simple, manufacture at
This low, high reliablity is for ease of maintenaince widely used in the whole world.The electric furnace is internally provided with to be limited with the concatenated temperature of pyrotoxin
Device processed, by the glass pane surface temperature limiting of electric furnace at 600 DEG C hereinafter, to prevent excessive temperature damage internal component or glass
Plate.However, temperature limiter only limits the glass pane surface temperature of electric furnace, edible oil spontaneous combustion cannot be prevented during the cooking process.
The United States Patent (USP) 7307246 for authorizing Smolenski provides a kind of system, puts in electric ceramic heaters for detecting and limiting
The temperature for the cooker set.But it does not provide the solution for preventing edible oil spontaneous combustion during the cooking process, while can not
Maintain the minimum edible oil temperature for required culinary art performance.
The United States Patent (USP) 9132302 for authorizing Longo provides one kind for preventing in gas burner, mosquito-repellent incense pipe electric furnace and electricity pottery
The measuring device and algorithm of the edible oil spontaneous combustion of furnace.But it does not disclose what how the system worked on glass plate electric furnace
Details, such as sensor is placed and wiring, upper and lower temperature limit are arranged, control the period etc..In addition, the bottom of algorithm control cooker
Temperature is consistently lower than edible oil autoignition temperature, this is not to prevent edible oil spontaneous combustion while still keeping the effective of required culinary art performance
Method.
The above invents the temperature for the sensor measurement being based only upon below glass hot zone to replace the real-time temperature of cooker
Degree, while assuming that this is also true that edible oil temperature, and it is compared with edible oil self-ignition point temperature.However, in glass
There are significant differences between the true temperature of the temperature and edible oil that measure below glass, are influenced by factors, temperature
TRANSFER MODEL (edible oil that temperature is transferred in cooker from below glass plate) includes the design of temperature sensor itself, temperature biography
The placement of sensor (for example, sensor is directly contacted with whether the bottom of glass has, or if exists between sensor and glass
Gap), fever disc-type and output power and cooker type.Oil temperature in uncertain cooker and the temperature under glass hot zone
In the case where relationship between degree, the temperature of the edible oil in cooker cannot be efficiently controlled, and can not maintain institute's phase
Minimum oil temperature needed for the culinary art performance of prestige.The present invention solves these problems.
The area of the present invention with background technique will be expressly understood from the disclosure of invention now given below, attached drawing and description
Not.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of electric furnace and using hot zone temperature limiting control method,
In this way, electric furnace can prevent edible oil spontaneous combustion during the cooking process, while still maintaining desired culinary art performance institute
The minimum oil temperature needed.
The present invention is to solve above-mentioned technical problem and the technical solution adopted is that provide a kind of edible in culinary art with preventing
The electric furnace of oily spontaneous combustion function, includes at least: the glass plate of one piece of support and heating cooker；One is at least installed below glass plate
Heat-generating disc；Each heat-generating disc installs the sensor and the control connecting with heat-generating disc that one measures glass hot zone temperature
Unit, for adjusting the output power of heat-generating disc；Described control unit is by the measurement result of temperature sensor and preset temperature
Bound is compared, and the temperature limit is by eating the corresponding relationship institute between oil temperature really in glass hot zone temperature and culinary art
It is fixed；When measurement temperature reaches temperature upper limit, control device reduces the output power of heat-generating disc；At a temperature of measurement temperature reaches
In limited time, control unit increases the output power of heat-generating disc, so that the edible oil temperature limiting in cooker be made to follow in controlled range
Ring, highest oil temperature are maintained at edible oil self-ignition point hereinafter, still maintaining the minimum oil temperature that culinary art requires simultaneously.
Above-mentioned electric furnace, wherein temperature upper limit is the food in the glass hot zone temperature based on sensor measurement and cooker
With between oil temperature relationship and edible oil self-ignition point temperature determine, influenced by following factor: temperature sensor type, temperature
Spend installation method and the position, the type of heat-generating disc and output power and the type of cooker etc. of sensor.Temperature upper limit is set
Provisioning request is that temperature reaches temperature upper limit when hot zone, and the edible oil maximum temperature in cooker is close but never reaches edible oil
Self-ignition point.
Above-mentioned electric furnace, wherein lowest temperature is the food in the glass hot zone temperature based on sensor measurement and cooker
Determine that the sets requirement of lowest temperature is, when hot zone temperature with minimum oil temperature needed for culinary art with the relationship between oil temperature
Degree reaches lowest temperature, minimum temperature needed for the edible oil temperature in cooker reaches culinary art.
Above-mentioned electric furnace, wherein including a temperature limiter, the temperature limiter includes the control connecting with heat-generating disc
Unit processed and the temp probe being encapsulated in the multilayer sleeve with inner insulating layer and inner insulating layer；The sleeve is reduced from fever
Plate convergence is incident upon the heat of temp probe, thus the temperature of the temperature reflection glass hot zone of temp probe measurement；Temperature limiter
Control unit compare probe measurement temperature and preset temperature bound, control the output power of heat-generating disc.
Above-mentioned electric furnace, wherein the multilayer sleeve is made of ceramics, glass or steel.
Above-mentioned electric furnace, wherein the multilayer sleeve further includes the metallic reflection between inner insulating layer and outer thermal insulation layer
Coating.
Above-mentioned electric furnace, wherein temperature sensor is placed on the bottom of glass hot zone, for measuring glass hot zone
Temperature, and send control circuit and control unit for temperature measurement result；Be integrated in control unit in control circuit with
Heat-generating disc electrical connection.
Above-mentioned electric furnace, wherein the temperature sensor includes temp probe, heat-barrier material and ceramic shell；With glass
The temp probe directly contacted is surrounded by heat-barrier material, and wherein heat-barrier material is compressed between glass and ceramic shell, thus
The heat for being radiated the probe and pieces of glass that are wrapped in heat-barrier material from heat-generating disc is separated, glass hair is thus placed on
Cooker on hot-zone becomes the probe and pieces of glass main heating source being wrapped in heat-barrier material.
Above-mentioned electric furnace, wherein wherein temperature sensor is bonded to the bottom of glass hot zone.
Above-mentioned electric furnace, wherein wherein temperature sensor is pressed against the bottom of glass hot zone by elastic device.
Above-mentioned electric furnace, wherein for the heating wire in heat-generating disc when placing, there are one immediately below temperature sensor for meeting
Non-heated region, to be further reduced the heat for being radiated sensor from heat-generating disc.
Above-mentioned electric furnace, wherein wherein temperature sensor can be single or multiple same apparatus, be distributed in glass fever
Area bottom different zones.
Above-mentioned electric furnace, wherein wherein the temperature sensor can be fibre optic temperature sensor, resistance temperature sensing
Device, high-temperature thermistor, polymer-derived-ceramics (PDC) sensor or thermocouple.
Above-mentioned electric furnace, wherein on the sensor surface with glass contact, increase an infrared coating, surveyed with improving
Warm nature energy.
Above-mentioned electric furnace, wherein described control unit is single relay, a group relay or silicon-controlled (SCR).
Above-mentioned electric furnace, wherein temperature sensor and control unit are integrated in a temperature controller, and temperature control
Device processed is placed on the bottom of glass hot zone.
Above-mentioned electric furnace, wherein the temperature controller includes temperature sensor, control unit, heat-barrier material and ceramics
Shell；Wherein, the temperature sensor of controller is directly contacted with the bottom of glass hot zone and is electrically connected with control unit；And
Control unit and heat-generating disc are electrically connected；Temperature sensor and control unit are surrounded by heat-barrier material, and wherein heat-barrier material is pressed
Contracting is between glass and ceramic shell, for completely cutting off the heat of the sensor and glass that are transmitted in heat-barrier material from heat-generating disc,
To make the cooker being placed on glass hot zone become the main heating source of sensor box and glass in heat-barrier material.
Above-mentioned electric furnace, wherein the temperature controller is sticked to the bottom of glass hot zone.
Above-mentioned electric furnace, wherein the temperature controller is pressed against the bottom of glass hot zone by elastic device.
Above-mentioned electric furnace, wherein heating wire in the heat-generating disc when placing, can immediately below temperature controller there are
One non-heated region, to be further reduced the heat for being transmitted to controller from heat-generating disc.
Above-mentioned electric furnace, wherein the temperature controller is bimetallic temperature controller.
Above-mentioned electric furnace, wherein further include " glass surface scalds " indicator light, measure glass hot zone temperature with one
Sensor connection, and be configured to light when hot zone temperature reaches predetermined temperature, it is boiling hot to alert user hot zone.
Above-mentioned electric furnace, wherein it further include automatic shut-off function, i.e., after any one heat-generating disc is powered on, function
Rate selector is not changed by the user in the given time, and all heat-generating discs are forced closed.
Above-mentioned electric furnace, wherein described control unit is configured as reaching by using the temperature bound of close limit
Temperature Rapid Circulation between 10-60 seconds to meet the culinary art requirement for higher cooking temp, while still preventing edible oil
Spontaneous combustion.
Above-mentioned electric furnace, wherein the heat-generating disc has 500W to the rated output power between 3500W.
Above-mentioned electric furnace, wherein the heat-generating disc is radiation heat-generating disc.
Above-mentioned electric furnace, wherein the heat-generating disc is infrared halogen lamp.
Above-mentioned electric furnace, wherein the heat-generating disc is electromagnetic heating element.
Another technical solution that the present invention uses to solve above-mentioned technical problem is to provide a kind of to be controlled using temperature
The method for preventing edible oil spontaneous combustion in culinary art, by applying the control of hot zone temperature limiting on above-mentioned electric furnace, to prevent from cooking
Edible oil spontaneous combustion in the process, at the same keep it is desired culinary art performance needed for minimum oil temperature method, comprising: a. test with true
Determine the relationship between the edible oil temperature in the temperature and cooker of hot zone；B. it is based on above-mentioned relation, setting is for controlling heating
Edible oil maximum temperature in culinary art is limited in edible oil self-ignition point hereinafter, and temperature is arranged by the temperature upper limit of source output power
Edible oil temperature is maintained at minimum temperature needed for performance is cooked in expectation or more by degree lower limit；C. it is formed in hot zone small heat-insulated
Area separates the heat transmitting from heat source to thermal insulation areas, and the cooker to be placed on hot zone is the main heating source of thermal insulation areas；D. warm
Spend the temperature of sensor measurement thermal insulation areas；E. the temperature of measurement is compared with temperature bound when measurement temperature reaches upper temperature
Degree is prescribed a time limit, and the output power of heating source is reduced；It prescribes a time limit when the temperature of measurement reaches lower temperature, increases the output power of heating source.
The present invention, which compares the prior art, to be had following the utility model has the advantages that provided by the invention a kind of controlled using temperature to prevent
The electric furnace and its method of edible oil spontaneous combustion in culinary art, the electric furnace include at least a crystallite glass being used to support with heating cooker
One or more one temperature sensor of heat-generating disc and each heat-generating disc band and one and sensor phase are installed under glass plate, glass
Control unit even.The sensor is directly contacted with glass hot zone bottom, measures glass temperature, and described control unit
It is electrically connected with heat-generating disc, and compares the hot zone temperature of sensor measurement and preset temperature bound carrys out regulation heating disk
Output power, the temperature of control and limitation glass hot zone, to prevent the spontaneous combustion of edible oil during the cooking process, while still keeping
Required culinary art performance.
In order to by the temperature limiting of edible oil in self-ignition point hereinafter, needing through the glass hot zone that is contacted with cooker of measurement
Temperature obtain the temperature of edible oil in cooker.
Based on many experiments, the present invention establishes the biography for the edible oil that temperature is transmitted in cooker below glass hot zone
Pass model.Edible oil temperature in real time, the hot zone temperature that can use the temperature TRANSFER MODEL and measurement obtain.Control unit
Preset temperature bound be based on temperature TRANSFER MODEL, edible oil temperature burning point and culinary art performance requirement to determine.
When the temperature of the edible oil in cooker is close to (but not reaching) edible oil self-ignition point, usually 360 DEG C to 400 DEG C
When, the hot zone temperature of measurement reaches ceiling temperature, and control unit reduces the output power of heat-generating disc, the maximum temperature of edible oil
It is limited in self-ignition point or less；When the minimum cooking temp cooked needed for the temperature of the edible oil in cooker is down to, measurement
Hot zone temperature reaches lower limit temperature, and control unit increases the output power of heat-generating disc, to improve or maintain the temperature of edible oil
Degree, with the minimum cooking temp for keeping culinary art required.To form the controlled of the temperature of edible oil and the changed power of heating dish
Circulation, and the maximum temperature of edible oil is limited in edible oil self-ignition point hereinafter, and electric furnace still meets desired culinary art
Minimum oil temperature needed for energy.
Detailed description of the invention
Description in conjunction with the following drawings, particularly unique feature of the present invention and advantage and other purposes will become obvious,
Wherein:
Fig. 1 is the perspective view of the electric furnace of a removal glass surface；
Fig. 2 is the glass surface front view of electric furnace shown in FIG. 1；
Fig. 3 is electric furnace fragmentary elevational view shown in FIG. 1, and the temperature limiter of heat-generating disc uses long casing, in the view,
Electric furnace glass is partially removed；
Fig. 4 is electric furnace fragmentary elevational view shown in FIG. 1, and the temperature limiter of heat-generating disc uses short sleeve, in the view,
Electric furnace glass is partially removed；
Fig. 5 is the optical cable of an electric furnace, including heat-generating disc, temperature sensor and segment glass；
Fig. 6 is the front view of heat-generating disc shown in 5；
Fig. 7 is the control circuit flow chart of electric furnace shown in Fig. 5 and Fig. 6；
Fig. 8 is the cross-sectional view of a part of an electric furnace, one of them 21 temperature controller of conjunction is mounted on heat-generating disc
Side；
Fig. 9 is the cross-sectional view of a part of an electric furnace, one of them 21 temperature controller of conjunction is mounted on heat-generating disc
Center.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
In one embodiment, such as Fig. 1, shown in 2,3,4, two electric ceramic heaters include two under glass plate 201, glass
A heat-generating disc 103, the temperature limiter 104 of each heat-generating disc and two hot zones 202.When heat-generating disc is powered, heat is from hair
Heated filament is transmitted to the bottom of glass hot zone, then the edible oil into cooker and cooker.In this embodiment, special temperature
Limiter include temperature sensor and with the concatenated control unit of heat-generating disc.It (generates heat for some large scales with long casing 105
Disk) or the temperature sensor 303 of short sleeve 401 (for some small heat-generating discs) be made of inflatable metal, and be placed on by
In the multilayer sleeve 301 that inner insulating layer and outer thermal insulation layer are formed.Inner insulating layer and outer thermal insulation layer can be by ceramics, glass or steels
At.Metal reflective coating is coated between two thermal insulation layers.Outer thermal insulation layer is shorter in length than or is equal to inner insulating layer.Utilize the spy
The sleeve of system, sensor is able to detect the bottom temp of glass hot zone, and the heat of only a small amount of heat-generating disc is transferred to temperature biography
Sensor.The control unit 302 of temperature limiter compares the temperature of sensor measurement and preset upper temperature limits and lower temperature limits, so
The power supply of on-off exploitation hot plate is followed by control the edible oil temperature in cooker.
Following table lists an example of the experimental temperature TRANSFER MODEL of the present embodiment, wherein in long casing, steel
The expanding metal temperature sensor of thermal insulation layer and the outer thermal insulation layer of glass is placed on the center of 2300W heat radiation heat-generating disc, and compares glass
The low 1.5mm of glass；This example uses cast iron frying pan, and minimum cooking temp is defined as 250 DEG C, this is most of edible
The boiling point of oil；The temperature of the edible oil in cooker, and the limit of temperature up and down of temperature limiter are measured in test.
| The glass hot zone bottom temp (DEG C) of sensor measurement | Edible oil temperature (DEG C) | Temperature limits (DEG C) |
| 260 | 150 | |
| 324 | 245 | 330；Lower temperature limit |
| 400 | 285 | |
| 510 | 340 | 505；Upper temperature limit |
In this example, when the glass hot zone temperature measured reaches upper temperature limit, at 505 DEG C, edible oil in cooker
When temperature is close to 340 DEG C, temperature limiter powers off heat-generating disc, and heating wire stops fever；When the measurement temperature of sensor is close
When lower temperature limits 330 DEG C, temperature limiter is powered to heat-generating disc, and heating wire starts to generate heat.Food is formed in this way in cooker
It is recycled with the controlled temperature of oil, and the maximum temperature of edible oil is limited in 340 DEG C, this temperature is lower than common edible oil
Self-ignition point, 360 DEG C~400 DEG C, while the minimum temperature of edible oil is 250 DEG C or so, ensure that required culinary art requirement.Change
Lower temperature limit will affect controlled oil temperature circulation and average oil temperature, this will meet different culinary art performance requirements.For example, for liking
The user of high-temperature cooking improves lower temperature limit and recycles controlled oil temperature is shortened, to provide higher cooking temp, while still
It can prevent edible oil spontaneous combustion.
In some embodiments, one as shown in Figure 5,6 is similar to two electric ceramic heaters shown in Fig. 1, and each heat-generating disc is except peace
It further include being mounted on the temperature sensor 501 of glass hot zone bottom and being integrated in electricity equipped with a normal temperature limiter 104
Control unit in furnace control circuit 107.Temperature sensor 501 may be mounted on the casing 105 of temperature limiter 104 or single
On only support tube.As shown in figure 5, temperature sensor 501 includes the temp probe 602 surrounded by heat-barrier material 603, heat-insulated material
Material 603 is compressed between glass plate 201 and the ceramic shell 604 of sensor.The bottom of temperature sensor and glass hot zone 202
Portion directly contacts, and can be and is sticked to Glass base or is pushed against glass by the elastic device of such as helical spring or leaf spring 608
On glass.The heat-barrier material of package probe generates a thermal insulation areas or cold-zone 502 on hot zone 202.Since heat-barrier material stops
Heat radiation from heat-generating disc is to probe and cold-zone, and the microcrystal glass material of electric furnace is high diathermanous radiativity and low heat conductivity
Property, so being sitting in the cooker on glass hot zone through glass radiations heat energy when probe measurement cold-zone glass temperature, become cold
The heat of the main heating source in area, that is, induction of popping one's head in is mainly the heat of cooker.It is directly radiated to be further reduced from heating wire
To the heat of probe, when heating wire 609 is placed, it is being located at immediately below temperature sensor, is forming a unheated zone 605.Temperature
The output signal of degree sensor is sent to the control unit of control circuit 107 shown in Fig. 2 by high temperature resistant line 606.Fig. 7 is shown
The example flow diagram of the control circuit of one the present embodiment.Control unit by comparing glass temperature measured by sensor with
Then preset temperature bound increaseds or decreases the output power of heat-generating disc to form edible oil temperature in controlled cooker and follow
Ring.Accordingly, the maximum temperature of edible oil is limited under edible oil self-ignition point, and required culinary art performance still is able to protect
Card.
Temp probe in the present embodiment can be fibre optic temperature sensor, resistance temperature sensor, thermocouple, high warm
Quick resistance, polymer-derived-ceramics (PDC) sensor or any kind of temperature detector.Temp probe can connect with glass
Apply infrared radiating coating on the detecting head surface of touching, to further increase sensor performance.
Control unit in the present embodiment can be a relay, a group relay or silicon controlled rectifier (SCR) (SCR) with
The output power of regulation heating disk.
Following table lists an example of the experimental temperature TRANSFER MODEL of the present embodiment, one of polymer-derived-ceramics
(PDC) temp probe is bonded to the bottom of glass hot zone；On the detecting head surface with glass contact, it is thoroughly infrared to be coated with 0.1mm
Radiation coating；Sensor is placed at distance fever disk center 35mm, and is surrounded by the ceramic fibre thermal insulation layer of 10mm；Control is single
Member is long-life DPST power relay；2300W heat radiation heat-generating disc and cast iron frying pan are used in this example；Minimum culinary art
Temperature is defined as 265 DEG C, slightly above common edible oil boiling point；The temperature of the edible oil in cooker is measured in test, and really
Determine the temperature limiting of control unit.
In the present embodiment, when the measurement temperature of probe, which reaches upper temperature, limits 340 DEG C, the actual temperature of edible oil is close
At 340 DEG C, control unit reduces the power of heat-generating disc, and heat-generating disc is made to generate less heat；When the measurement temperature of sensor connects
When closely lower temperature limits 325 DEG C, control unit increases the power of heat-generating disc, and heat-generating disc is made to generate more heats.The shape in cooker
It is recycled at the controlled temperature of edible oil, and the maximum temperature of edible oil is limited in 340 DEG C, is lower than edible oil self-ignition point, and
Electric furnace still is able to needed for maintaining culinary art 265 DEG C of minimum cooking temp.
In some embodiments, as shown in figure 8, one is similar to two electric ceramic heaters shown in Fig. 1, each heat-generating disc is except installation
There is normal temperature limiter 104, further includes a two-in-one temperature controller 900, by temperature sensor 901 and control unit
902 are integrated in individual devices.Temperature controller is surrounded by thermal insulation layer 903, and thermal insulation layer is compressed in ceramic shell 904 and glass
Between.Temperature controller may be mounted on the casing 105 or individual support tube of temperature limiter 104.Temperature controller and
Glass hot zone 202 directly contacts, and is bonded to the bottom of glass hot zone, or fill by the elasticity of such as helical spring 906
It sets and is pushed against on glass.Control unit is connected by conducting wire 905 with heating wire 609.Heat-barrier material generated in hot zone 202 every
Hot-zone or cold-zone 908.The sensor measurement cold-zone glass temperature directly contacted with glass, cold-zone glass temperature is to be sitting in hot zone
On cooker be main heat source, heat is transferred to sensor by cold-zone glass.In order to be further reduced from heating wire 609 to temperature
The direct heat radiation for spending controller, when heating wire is placed, is formed immediately below a unheated zone in temperature controller.Control is single
Preset temperature bound is compared by member with the temperature of sensor measurement, then leads to or close all or part of confession of heat-generating disc
Electricity to limit the temperature of the edible oil in cooker, and keeps cooking required minimum oil temperature.
Following table lists an example of the experimental temperature TRANSFER MODEL of the embodiment, wherein temperature controller, and one double
Metal temperature control device is bonded to the bottom of glass hot zone, distance fever disk center 30mm.Temperature controller and temperature controller ceramics ectosome it
Between be 10mm ceramic fibre thermal insulation layer.The saturating infrared radiating coating of 0.1mm is coated on the temperature controller surface of contact glass.This reality
It applies and uses 2300W heat radiation heat-generating disc and cast iron frying pan in example.Minimum cooking temp is defined as 265 DEG C, slightly above edible oil
Boiling point, the temperature of the edible oil in cooker is measured in test, and determines the temperature bound of temperature controller.
| The glass hot zone bottom temp (DEG C) of sensor measurement | Edible oil temperature (DEG C) | Temperature limits (DEG C) |
| 200 | 150 | |
| 275 | 265 | 280；Lower temperature limit |
| 310 | 285 | |
| 380 | 340 | 375；Upper temperature limit |
In this example, when the cold-zone glass of thermostat measurement temperature, which reaches upper temperature, limits 375 DEG C, temperature controller is to fever
Disk power-off makes heat-generating disc stop generating heat；When the glass temperature of measurement, which reaches lower temperature, limits 280 DEG C, temperature controller is to fever
Disk is powered, and heat-generating disc is made to generate heat.The controlled temperature circulation of edible oil, and the maximum temperature of edible oil are formed in cooker
It is limited in 340 DEG C, is lower than edible oil self-ignition point, and electric furnace still maintains and cooks required minimum cooking temp, 265 DEG C.
Fig. 9 shows another embodiment, is similar to embodiment shown in Fig. 8.But in this embodiment, temperature controls
Device 900 is placed on the center of heating element, and temperature limiter has short sleeve 401.
Following table lists the example of the experimental temperature TRANSFER MODEL of the embodiment, wherein temperature controller is bimetallic temperature
Device is controlled, is sticked to the bottom of glass hot zone, and immediately below the center of hot zone.When heating wire is routed, in heat-generating disc
The heart, there are a unheated zones for temperature controller underface.Other test conditions are identical with the embodiment of Fig. 8.
| The glass hot zone bottom temp (DEG C) of sensor measurement | Edible oil temperature (DEG C) | Temperature limits (DEG C) |
| 200 | 150 | |
| 260 | 265 | 265；Lower temperature limit |
| 300 | 285 | |
| 340 | 340 | 335；Upper temperature limit |
In the present embodiment, when the cold-zone of thermostat, measurement temperature reaches upper 335 DEG C of temperature limit, temperature controller makes heat-generating disc
Power-off, heat-generating disc stop generating heat；When the temperature of measurement, which reaches lower temperature, limits 265 DEG C, temperature controller is powered to heat-generating disc, makes
Heat-generating disc generates heat.The controlled temperature circulation of edible oil is formed in cooker, and the maximum temperature of edible oil is limited in
340 DEG C, it is lower than edible oil self-ignition point, and electric furnace still maintains and cooks required minimum cooking temp, 265 DEG C.
In some embodiments, the heat-generating disc of the electric furnace has the rated output power between 500W and 3500W.
In some embodiments, the heat-generating disc of the electric furnace can be heat radiation heat-generating disc, infrared halogen lamp or electromagnetism hair
Hot plate.
In some embodiments, the electric furnace can be single or multiple heat-generating disc burners.
In some embodiments, the electric furnace can be the electric furnace at least four heat-generating disc, with oven.
In some embodiments, the electric furnace limits range using narrow default temperature up and down, can shorten controlled temperature
Circulation time improves cooking temp, and still is able to prevent edible oil spontaneous combustion.For example, electric furnace can be configured as 10-60 seconds
The temperature control cycles time, and keep higher average edible oil cooking temp, 300 DEG C to 340 DEG C, thus for need compared with
The user of high cooking temp provides required culinary art performance, while still can prevent edible oil spontaneous combustion.
In some embodiments, electric furnace includes that glass surface shown in Fig. 2 scalds indicator 204, is controlled by control circuit 107
System, is boiling hot to alert user's glass hot zone.Control circuit receives the measurement temperature from a temperature sensor, the temperature
Temperature below sensor measurement hot zone is then based on experimental temperature TRANSFER MODEL and calculates hot zone surface temperature.If hair
Hot-zone surface temperature is higher than preset, such as 50 DEG C -60 DEG C, then illuminating indicators, until hot zone surface temperature is lower than default
Point, is then shut off indicator.
In some embodiments, electric furnace includes automatic closing function.After heat-generating disc energization, if the power selection of Fig. 2
Device 203 is arranged to maximum power, and user is within a preset time, such as 60 minutes, does not change the function of any heat-generating disc
Rate selector, then all heat-generating discs are automatically closed in electric furnace；If power selector be arranged to minimum power and maximum power it
Between a bit, then preset time extends, such as 60 to 120 minutes.
Multiple preferred embodiments are fully described above with reference to attached drawing.The scope of the claims should not be by preferred reality
The limitation of example and embodiment is applied, but it should providing and entirely describing consistent broadest interpretation.
Claims (25)
1. it is a kind of with the electric furnace for preventing edible oil spontaneous combustion function in culinary art, it includes at least:
The glass plate of one piece of support and heating cooker；
One heat-generating disc is at least installed below glass plate；
Each heat-generating disc install one measurement glass hot zone temperature sensor and
One control unit being connect with heat-generating disc, for adjusting the output power of heat-generating disc；
The measurement result of temperature sensor is compared by described control unit with preset temperature bound, the temperature limit by
The corresponding relationship eaten between oil temperature in glass hot zone temperature and culinary art is determined；
When measurement temperature reaches temperature upper limit, control device reduces the output power of heat-generating disc；
When measurement temperature reaches lowest temperature, control unit increases the output power of heat-generating disc, to make edible in cooker
Oil temperature is limited in circulation, highest oil temperature in controlled range and is maintained at edible oil self-ignition point and wants hereinafter, still maintaining culinary art simultaneously
The minimum oil temperature asked.
2. electric furnace according to claim 1, which is characterized in that the temperature upper limit is the glass hair based on sensor measurement
Relationship between edible oil temperature and edible oil self-ignition point temperature in hot zone temperature and cooker determine, by the shadow of following factor
It rings: the temperature sensor type, the installation method of temperature sensor and position, the type of heat-generating disc and output power, and
The type of cooker；The sets requirement of temperature upper limit is that temperature reaches temperature upper limit when hot zone, the edible oil highest temperature in cooker
Degree is close but never reaches edible oil self-ignition point.
3. electric furnace according to claim 1, which is characterized in that lowest temperature is the glass hot zone based on sensor measurement
Minimum oil temperature needed for relationship between edible oil temperature and culinary art in temperature and cooker determines that the setting of lowest temperature is wanted
Seeking Truth, when hot zone, temperature reaches lowest temperature, minimum temperature needed for the edible oil temperature in cooker reaches culinary art.
4. electric furnace according to claim 1, which is characterized in that including a temperature limiter, the temperature limiter packet
The temp probe for including the control unit connecting with heat-generating disc and being encapsulated in the multilayer sleeve with inner insulating layer and inner insulating layer；
The sleeve reduces the heat that temp probe is radiated to from heat-generating disc, and thus the temperature of temp probe measurement reflects glass hot zone
Temperature；The control unit of temperature limiter compares probe measurement temperature and preset temperature bound, controls the defeated of heat-generating disc
Power out.
5. electric furnace according to claim 4, which is characterized in that the multilayer sleeve is made of ceramics, glass or steel.
6. electric furnace according to claim 4, which is characterized in that the multilayer sleeve further includes in inner insulating layer and outer heat-insulated
Metal reflective coating between layer.
7. electric furnace according to claim 1, which is characterized in that the temperature sensor is placed on the bottom of glass hot zone
Portion is sent to control circuit and control unit for measuring the temperature of glass hot zone, and by temperature measurement result；It is integrated in control
Control unit and heat-generating disc in circuit processed are electrically connected.
8. electric furnace according to claim 7, which is characterized in that the temperature sensor includes temp probe, heat-barrier material
And ceramic shell；Surrounded with the temp probe that glass directly contacts by heat-barrier material, wherein heat-barrier material be compressed in glass and
Between ceramic shell, thus by be radiated from heat-generating disc the probe and pieces of glass being wrapped in heat-barrier material heat carry out every
Disconnected, the cooker being thus placed on glass hot zone becomes the probe and pieces of glass main heating source being wrapped in heat-barrier material.
9. electric furnace according to claim 7, which is characterized in that the temperature sensor is bonded to the bottom of glass hot zone
Or the bottom of glass hot zone is pressed against by elastic device.
10. electric furnace according to claim 7, which is characterized in that the heating wire in the heat-generating disc, can be in temperature when placing
Spending sensor underface, there are a non-heated regions, to be further reduced the heat for being radiated sensor from heat-generating disc.
11. electric furnace according to claim 7, which is characterized in that the temperature sensor is single or multiple same apparatus,
It is distributed in glass hot zone bottom different zones.
12. electric furnace according to claim 7, which is characterized in that the temperature sensor is fibre optic temperature sensor, resistance
Temperature sensor, high-temperature thermistor, polymer-derived-ceramics (PDC) sensor or thermocouple.
13. electric furnace according to claim 7, which is characterized in that on the sensor surface with glass contact, increase by one
Infrared coating, to improve thermometric performance.
14. electric furnace according to claim 7, which is characterized in that described control unit is single relay, a group relay
Or silicon-controlled (SCR).
15. electric furnace according to claim 1, which is characterized in that the temperature sensor and control unit are integrated in one
In temperature controller, and temperature controller is placed on the bottom of glass hot zone.
16. electric furnace according to claim 15, which is characterized in that the temperature controller includes temperature sensor, control
Unit, heat-barrier material and ceramic shell；Wherein, the temperature sensor of controller directly contacted with the bottom of glass hot zone and with
Control unit electrical connection；And control unit and heat-generating disc are electrically connected；Temperature sensor and control unit are by heat-barrier material packet
It encloses, wherein heat-barrier material is compressed between glass and ceramic shell, is transmitted in heat-barrier material for completely cutting off from heat-generating disc
The heat of sensor and glass, so that the cooker being placed on glass hot zone be made to become sensor box and glass in heat-barrier material
The main heating source of glass.
17. electric furnace according to claim 15, which is characterized in that the temperature controller is sticked to the bottom of glass hot zone
Or the bottom of glass hot zone is pressed against by elastic device.
18. electric furnace according to claim 15, which is characterized in that when placing, meeting exists the heating wire in the heat-generating disc
There are a non-heated regions immediately below temperature controller, to be further reduced the heat for being transmitted to controller from heat-generating disc.
19. electric furnace according to claim 15, which is characterized in that the temperature controller is bimetallic temperature controller.
20. electric furnace according to claim 1, which is characterized in that further include " glass surface scalds " indicator light, surveyed with one
The sensor connection of glass hot zone temperature is measured, and is configured to light when hot zone temperature reaches predetermined temperature, with police
It is boiling hot for accusing user hot zone.
21. electric furnace according to claim 1, which is characterized in that further include automatic shut-off function, i.e., in any one fever
After disk is powered on, power selector is not changed by the user in the given time, and all heat-generating discs are forced closed.
22. electric furnace according to claim 1, which is characterized in that described control unit is configured as by using close limit
Temperature bound reach the temperature Rapid Circulation between 10-60 seconds, wanted with meeting for the culinary art of higher cooking temp
It asks, while still preventing edible oil spontaneous combustion.
23. electric furnace according to claim 1, which is characterized in that the heat-generating disc has 500W to specified between 3500W
Output power.
24. electric furnace according to claim 1, which is characterized in that the heat-generating disc be radiation heat-generating disc, infrared halogen lamp or
Electromagnetic heating element.
25. a kind of method for preventing edible oil spontaneous combustion in culinary art using temperature control, which is characterized in that in claim 1-24
By applying the control of hot zone temperature limiting on described in any item electric furnaces, to prevent the edible oil spontaneous combustion in cooking process, together
When keep it is desired culinary art performance needed for minimum oil temperature method, comprising:
A. the relationship between the edible oil temperature in the temperature and cooker to determine hot zone is tested；
B. it is based on above-mentioned relation, the temperature upper limit for controlling heating source output power is set, by the edible oil highest in culinary art
Temperature limiting in edible oil self-ignition point hereinafter, and be arranged lowest temperature by edible oil temperature be maintained at expectation cook performance needed for
It is more than minimum temperature；
C. small thermal insulation areas is formed in hot zone；
Separate the heat transmitting from heat source to thermal insulation areas；
And the cooker to be placed on hot zone is the main heating source of thermal insulation areas；
D. the temperature of temperature sensor measurement thermal insulation areas；
E. the temperature of measurement is compared with temperature bound and is prescribed a time limit when measurement temperature reaches upper temperature, reduce the defeated of heating source
Power out；It prescribes a time limit when the temperature of measurement reaches lower temperature, increases the output power of heating source.
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| CN201810584331.2A CN109028172B (en) | 2018-06-08 | 2018-06-08 | Electric stove for preventing edible oil from spontaneous combustion in cooking by using temperature control and method thereof |
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|---|---|---|---|
| CN201810584331.2A CN109028172B (en) | 2018-06-08 | 2018-06-08 | Electric stove for preventing edible oil from spontaneous combustion in cooking by using temperature control and method thereof |
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| US20140048293A1 (en) * | 2012-08-14 | 2014-02-20 | Wade Luongo | Device and method for cooktop fire mitigation |
| CN107543217A (en) * | 2016-06-28 | 2018-01-05 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooking pot and its control method and device |
| CN207132985U (en) * | 2017-08-07 | 2018-03-23 | 上汽通用汽车有限公司 | Exhaust gas temperature sensor mounting structure |
| CN107860035A (en) * | 2017-11-08 | 2018-03-30 | 海盐东海电器有限公司 | A kind of electric ceramic heaters heat-generating disc with temperature limiting control function |
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2018
- 2018-06-08 CN CN201810584331.2A patent/CN109028172B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140048293A1 (en) * | 2012-08-14 | 2014-02-20 | Wade Luongo | Device and method for cooktop fire mitigation |
| CN107543217A (en) * | 2016-06-28 | 2018-01-05 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooking pot and its control method and device |
| CN207132985U (en) * | 2017-08-07 | 2018-03-23 | 上汽通用汽车有限公司 | Exhaust gas temperature sensor mounting structure |
| CN107860035A (en) * | 2017-11-08 | 2018-03-30 | 海盐东海电器有限公司 | A kind of electric ceramic heaters heat-generating disc with temperature limiting control function |
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