CN112393283B - Cooking utensil - Google Patents
Cooking utensil Download PDFInfo
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- CN112393283B CN112393283B CN201910741664.6A CN201910741664A CN112393283B CN 112393283 B CN112393283 B CN 112393283B CN 201910741664 A CN201910741664 A CN 201910741664A CN 112393283 B CN112393283 B CN 112393283B
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- pot
- heating
- pot body
- temperature
- cooking appliance
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- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The present invention provides a cooking appliance, comprising: a hob, a base plate of the hob being configured to place a pan body, the hob comprising: a heating module configured to heat the pan body; the pot detection module is arranged inside the furnace plate and is configured to detect the temperature distribution and the temperature change of the substrate according to a preset time interval and send the temperature distribution and the temperature change to the heating module, the heating module is configured to determine the placement area of the pot body on the substrate according to the temperature distribution and heat the pot body in the placement area, and the heating module is further configured to determine the target area where the pot body moves according to the temperature change and control the heating module to preheat the target area. Through the technical scheme of the invention, the parameters such as the material, the size, the placement area and the like of the pot body can be detected more accurately, meanwhile, the cooking efficiency can be improved, and the use experience of a user can be improved.
Description
Technical Field
The invention relates to the technical field of cooking, in particular to a cooking appliance.
Background
As one of the most commonly used cooking appliances, an induction cooker generally has a heating scheme that a microcrystalline panel (touch panel) of the induction cooker is provided with a plurality of concentric magnetic induction coils to heat a pot body, and a thermistor or a temperature sensor is arranged below the microcrystalline panel to detect a cooking temperature of the pot body.
In the related art, detection of a pot body is usually based on a placement area of the pot body, and the structure and layout of a magnetic induction coil are improved so as to realize uniform distribution of an electromagnetic field and further improve heating efficiency.
However, for a small pot body, the heating power of the magnetic induction coil is still greatly wasted, and the coil is heavy, so that the size of the stove plate is large, the stove plate is heavy, and the use experience of a user is seriously influenced.
In addition, the pot body can be moved in position in the cooking process, and the heat can be transmitted to the base plate of the stove plate after the pot body heated based on the eddy current effect is moved, so that the heat loss of the pot body can be caused, and the heating efficiency of the pot body is further influenced.
In conclusion, any discussion of the background art throughout the specification is not an admission that such background art is necessarily prior art to those skilled in the art, and any discussion of the prior art throughout the specification is not an admission that such prior art is widely known or forms part of common general knowledge in the field.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the present invention is to provide a cooking appliance.
In order to achieve the above object, according to an embodiment of a first aspect of the present invention, there is provided a cooking appliance including: a hob, a base plate of the hob configured to place the pan body, the hob comprising: a heating module configured to heat the pan body; the pot detection module is integrated in the base plate, and is configured to detect the temperature distribution and the temperature change of the base plate according to a preset time interval and send the temperature distribution and the temperature change to the heating module, wherein the heating module is configured to determine the placement area of the pot body on the base plate according to the temperature distribution and heat the pot body in the placement area, and the heating module is further configured to determine the target area where the pot body moves according to the temperature change and control the heating module to preheat the target area.
In the above technical solution, optionally, the heating module is further configured to determine a position change of the pot body according to the temperature change and the placement area, predict a target area where the pot body moves according to the position change, and control the heating module to preheat the target area.
According to the technical scheme, the pot detection module is arranged on the base plate, detected temperature distribution is mainly used for determining the placement area of the pot body, the base plate of the placement area corresponding to the pot body absorbs more heat under the condition that the same excitation frequency is applied to the magnetic induction coil based on the fact that the heat conductivity of the pot body is higher than that of air, the detected area with slower temperature rise corresponds to the placement area of the pot body, and meanwhile the size of the pot body can be determined.
In addition, examine a pot module through control and detect temperature variation according to preset time interval, if the pot body takes place to remove, then can confirm the target area that the pot body removed through temperature variation to preheat the target area through control heating module group and improve the efficiency of heating the pot body, reduce the calorific loss after the pot body removes, be favorable to promoting the heating efficiency of the pot body.
Further, the placement region is a heating region determined based on the eddy current effect, that is, the substrate of the placement region does not generate heat, and the target region may be a heating region that increases the temperature of the substrate based on infrared heating or thermal resistance heating.
The preset time interval may be a numerical value preset by a developer, or a numerical value set according to the power and/or frequency of the heating module.
According to the cooking utensil of the invention, the following technical characteristics can be provided:
in the above technical solution, optionally, the heating module includes: an infrared heating coating disposed on the substrate, the infrared heating coating configured to generate heat in response to received infrared radiation; the infrared radiation emitter is arranged on the lower side of the infrared heating coating and is configured to generate infrared radiation corresponding to first heating power and directionally send the infrared radiation to the placement area, and/or the infrared radiation emitter is further configured to generate infrared radiation corresponding to second heating power and directionally send the infrared radiation to the target area, wherein the second heating power is smaller than or equal to the first heating power.
In this technical scheme, have infrared heating coating through setting up the base plate, infrared radiation can send to local infrared heating coating, and then combine the region of placing of the pot body that detects, the infrared heating coating that corresponds with the pot body on the control substrate generates the heat, and then when guaranteeing pot body culinary art effect, further reduce the heating consumption, in addition, because the outstanding characteristics of infrared heating coating are frivolous, therefore, combine infrared heating coating and magnetic induction coil to heat the pot body, also be favorable to further optimizing the whole weight and the volume of stone or metal plate for standing a stove on as a precaution against fire.
Specifically, place the heat that the infrared heating coating that the region corresponds generated and be used for heating the pot body, and the infrared heating coating that the target area corresponds is used for preheating to reduce the heat velocity of flow after the pot body removes, help shortening the culinary art long time, and then promote user's use experience and edible taste.
In any one of the above technical solutions, optionally, the pot detection module further includes: the pot detection coil array is integrated on the substrate, any pot detection unit in the pot detection coil array comprises at least two mutually coupled magnetic induction coils, the pot body can be independently heated by any pot detection unit, and a resonance voltage is generated in the heating process, wherein the resonance voltage is configured to determine the placement area and/or determine the attribute information of the pot body, and the attribute information comprises at least one parameter of the material, the shape and the size of the pot body.
In the technical scheme, any pot detecting unit is arranged to comprise at least two mutually coupled magnetic induction coils, so that the pot body can be independently heated by the pot detecting unit, resonance voltage is generated in the heating process, read values are sequenced, and particularly, the read values are foundTo a maximum value V of the resonance voltage max And minimum value V of resonance voltage min If V is detected max -V min >V, determining that an iron pan is placed in the heating area, and further reading the minimum value V of the resonance voltage min And resonance voltage values V of N magnetic induction coils taking the resonance voltage values as geometric centers N When V is N (N may be a positive integer or a serial number of a plane coordinate point) is less than the resonance voltage threshold V A And when the pot body is placed, the positions of the base plates corresponding to the magnetic induction coils are judged, and the size of the pot body is further confirmed.
In any one of the above technical solutions, optionally, the pot detection module further includes: a temperature sensing array integrated with the substrate, the temperature sensing array configured to detect a temperature distribution on the substrate, wherein the temperature sensing array comprises a plurality of temperature sensing units, each of the temperature sensing units is capable of individually detecting a temperature, and the temperature sensing units comprise thermistors connected in series with the magnetic sensing coils.
In the technical scheme, the temperature sensing array is arranged inside the furnace plate so as to determine the temperature values of a plurality of dot matrix areas on the substrate and collect the temperature values into temperature distribution, so that the reliability and accuracy of detection of the placement area of the pot body can be effectively improved.
In addition, the temperature sensing unit comprises the thermistor connected with the magnetic sensing coil in series, a temperature sensor is not required to be arranged independently, the resonance voltage is determined by reading the voltage of the thermistor, and the design difficulty and the layout complexity of the temperature sensing unit are simplified while the reliability and the accuracy of temperature detection are ensured.
The temperature sensing array may include a plurality of resistive thermometers and/or a plurality of infrared thermometers.
In any of the above technical solutions, optionally, the pot inspection unit has an outer diameter ranging from 5mm to 100mm.
In this technical scheme, the outer diameter size of examining pot unit is preferably 35mm.
In any of the above technical solutions, optionally, the pot detection unit has a thickness ranging from 1mm to 5mm.
In this technical scheme, the thickness of examining pot unit is preferably 1.5um.
In any of the above technical solutions, optionally, the range of the line pitch of the pot detection unit is 0.2mm to 5mm.
In this technical scheme, the line spacing of examining pot unit is preferably 0.4mm.
In any of the above technical solutions, optionally, the inductance of the pot detection unit is 0.5uH to 4uH, the resistance of the pot detection unit is 0.8 Ω to 3 Ω, and the capacitance of the pot detection unit is 10pF to 80pF.
In any of the above technical solutions, optionally, the inductance of the pan detecting unit is 2.3uH, the resistance of the pan detecting unit is 1.54 Ω, and the capacitance of the pan detecting unit is 44.6pF.
In the technical scheme, when two mutually coupled magnetic induction coils of the pot detection unit are used as a transformer, the pot detection unit has an inductive function, namely if alternating current passes through one magnetic induction coil, the other magnetic induction coil generates induced potential, and the magnitude of the induced potential depends on an eddy current effect, namely the conductivity of the pot body to be detected.
In addition, regarding the insulating material, two magnetic induction coils of the pot detection unit are regarded as a planar capacitor, the capacity of the capacitor changes along with the change of the dielectric constant of the insulating material, the output voltage of the magnetic induction coils can be read from a sampling resistor connected in series with the magnetic induction coils, wherein the magnetic induction coils can be metal wire coils obtained by etching copper films, and furthermore, the copper film grounding is used as a shielding layer to reduce external interference.
Because the materials of the pan body are different, the inherent thermal conductivity of the pan body is different, so that the temperature distribution of the area on the base plate where the pan body is placed and the temperature distribution of the area where the pan body is not placed are obviously different, and the identification of the placing area and the materials of the pan body is realized based on the temperature distribution.
In any of the above technical solutions, optionally, the method further includes: the first insulating coating is coated on the surface of the pot detection module, and the first insulating coating is configured to eliminate the electromagnetic interference of the pot detection module.
In any of the above technical solutions, optionally, the method further includes: a second insulating coating applied to a surface of the infrared heating coating, the second insulating coating configured to eliminate electromagnetic interference of the infrared heating coating.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic block diagram of a cooking appliance of an embodiment of the present invention;
fig. 2 shows a schematic block diagram of a cooking appliance of another embodiment of the present invention;
fig. 3 shows a schematic block diagram of a cooking appliance of a further embodiment of the present invention;
fig. 4 shows a schematic block diagram of a cooking appliance of a further embodiment of the present invention;
fig. 5 shows a schematic block diagram of a cooking appliance of a further embodiment of the present invention;
fig. 6 shows a schematic block diagram of a cooking appliance of a further embodiment of the present invention;
fig. 7 shows a schematic block diagram of a cooking appliance of a further embodiment of the present invention.
Wherein, the correspondence between the structure and the identification of the cooking appliance shown in fig. 1 to 7 is as follows:
the pot detection device comprises a furnace plate 100, an infrared heating coating 102, a temperature sensing array 104, a pot detection unit 106, a first end 1062 of a first magnetic induction coil, a second end 1064 of the first magnetic induction coil, a first end 1066 of a second magnetic induction coil, a second end 1068 of the second magnetic induction coil, a placing area 200 of a pot body, a heating area 300, a preheated target area 400 and a prompt module 108.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the scope of the present invention is not limited by the specific embodiments disclosed below.
A cooking appliance defined in an embodiment of the present invention will be specifically described below with reference to fig. 1 to 7.
The first embodiment is as follows:
as shown in fig. 1 and 2, a cooking appliance according to an embodiment of the present invention includes: a furnace tray 100, a base plate of the furnace tray 100 being configured to place the pot body, a heating module being provided in the furnace tray 100, the heating module being configured to heat the pot body; examine a pot module, locate inside stove plate 100, examine a pot module and be configured to detect the temperature distribution of base plate, examine pot module and be configured to detect according to preset time interval the temperature distribution and the temperature variation of going up the base plate, and will the temperature distribution with the temperature variation sends to the heating module, wherein, the heating module is configured to confirm according to the temperature distribution the pot body is in the region is placed to the base plate, and to place regional pot body heats, the heating module still is configured to confirm according to the temperature variation the target region that the pot body removed, and control the heating module preheats the target region.
In the above technical solution, optionally, the heating module is further configured to determine a position change of the pot body according to the temperature change and the placement area 200, predict a target area where the pot body moves according to the position change, and control the heating module to preheat the target area.
In this technical scheme, through set up on the base plate and examine a pot module, the temperature distribution that detects is mainly used for confirming the placing region 200 of the pot body, because the thermal conductivity of the pot body is higher than the thermal conductivity of air, based on the absorption of the pot body to the heat, under exerting same excitation frequency to the magnetic induction coil, the base plate of placing region 200 that the pot body corresponds absorbs more heat, the slower region of detected temperature rise corresponds to the placing region 200 of the pot body, simultaneously, can confirm the size of the pot body.
In particular, for a cooking appliance, a heating module of the cooking appliance generally includes a magnetic induction coil and a coil driving circuit, and the coil driving circuit adjusts the heating power of the magnetic induction coil after receiving a cooking temperature, so as to further improve the heating efficiency.
In addition, examine a pot module through control and detect temperature variation according to the time interval that predetermines, if the pot body takes place to remove, then can confirm the target area that the pot body removed through temperature variation to preheat the target area through control heating module group and improve the efficiency that heats the pot body, reduce the calorific loss after the pot body removes, be favorable to promoting the heating efficiency of the pot body.
Further, the placing region 200 is a heating region determined based on an electromagnetic effect between the pan body and the pan detecting module, that is, the substrate of the placing region 200 does not generate heat, and the target region 400 may be a heating region for increasing the temperature of the substrate based on infrared heating or thermal resistance heating.
The preset time interval may be a numerical value preset by a developer, or a numerical value set according to the power and/or frequency of the heating module.
According to the cooking utensil of the invention, the following technical characteristics can be provided:
in the above technical solution, optionally, the heating module includes: an infrared heating coating 102 disposed on the substrate, the infrared heating coating 102 configured to generate heat in response to received infrared radiation; an infrared radiation emitter disposed on the underside of the infrared heating coating 102, the infrared radiation emitter configured to generate the infrared radiation and direct the infrared radiation toward the placement area.
In this technical scheme, have infrared heating coating 102 through setting up the base plate, infrared radiation can send to local infrared heating coating 102, and then combine the pot body that detects to place regional 200, the infrared heating coating 102 that corresponds with the pot body on the control substrate generates the heat, and then when guaranteeing the pot body culinary art effect, further reduce the heating consumption, additionally, because infrared heating coating 102's outstanding characteristics are frivolous, therefore, combine infrared heating coating 102 and magnetic induction coil to heat the pot body, also be favorable to further optimizing the whole weight and the volume of stone or metal plate for standing a stove on as a precaution against fire.
Specifically, place the heat that the infrared heating coating that regional 200 corresponds generated and be used for heating the pot body, and the infrared heating coating that target area 400 corresponds is used for preheating to reduce the heat velocity of flow after the pot body removes, help shortening the culinary art for a long time, and then promote user's use experience and edible taste.
In any one of the above technical solutions, optionally, the pot detection module further includes: a pot detection coil array integrated on the substrate, wherein any pot detection unit 106 in the pot detection coil array comprises at least two magnetic induction coils coupled with each other, and any pot detection unit 106 can heat the pot body independently and generate a resonance voltage in the heating process, wherein the resonance voltage is configured to determine the placement area and/or determine attribute information of the pot body, and the attribute information comprises at least one parameter of material, shape and size of the pot body.
In this technical solution, by setting any pot detection unit 106 to include at least two magnetic induction coils coupled to each other, any pot detection unit 106 can heat the pot body independently, generate resonance voltage in the heating process, and sequence the read values, specifically, find the maximum value V of the resonance voltage max And minimum value V of resonance voltage min If V is detected max -V min >V, it is considered that an iron pan is placed in the heating region 300, and further, the minimum value V of the resonance voltage is read min And resonance voltage values V of N magnetic induction coils taking the resonance voltage values as geometric centers N When V is N (N may be a positive integer or a planar coordinate point (x,y) corresponding serial number) is less than the resonance voltage threshold V A And then judging the positions of the substrates corresponding to the magnetic induction coils to place the pot body, and further confirming the size of the pot body.
In any one of the above technical solutions, optionally, the pot detection module further includes: a temperature sensing array 104 integrated with the substrate, the temperature sensing array configured to detect a temperature distribution on the substrate, wherein the temperature sensing array 104 comprises a plurality of temperature sensing units, each of the temperature sensing units being capable of individually detecting a temperature, the temperature sensing units comprising a thermistor R in series with the magnetic sensing coil.
In this technical scheme, through locating temperature sensing array 104 inside the stone or metal plate for standing a stove on to confirm the regional temperature value T of a plurality of dot matrixes on the base plate, and summarize to temperature distribution, can improve the reliability and the accuracy that the regional 200 detected of placing of the pot body effectively.
The temperature sensing array 104 may include a plurality of resistive thermometers and/or a plurality of infrared thermometers.
In any of the above technical solutions, optionally, the pot detection unit 106 has an outer diameter ranging from 5mm to 100mm.
In this technical solution, the outer diameter of the pan detecting unit 106 is preferably 35mm.
In any of the above technical solutions, optionally, the thickness range of the pan detecting unit 106 is 1mm to 5mm.
In this technical solution, the thickness of the pan detecting unit 106 is preferably 1.5um.
In any of the above technical solutions, optionally, the line pitch range of the pan detecting unit 106 is 0.2mm to 5mm.
In this technical solution, the line spacing of the pot detection unit 106 is preferably 0.4mm.
In any of the above technical solutions, optionally, the inductance of the pot detecting unit 106 is 0.5uH to 4uH, the resistance of the pot detecting unit 106 is 0.8 Ω to 3 Ω, and the capacitance of the pot detecting unit 106 is 10pF to 80pF.
In any of the above technical solutions, optionally, the inductance of the pan detecting unit is 2.3uH, the resistance of the pan detecting unit is 1.54 Ω, and the capacitance of the pan detecting unit is 44.6pF.
In this embodiment, when the two mutually coupled magnetic induction coils of the pan detecting unit 106 are used as a transformer, it has an inductive function, that is, if an alternating current flows through one of the magnetic induction coils, the other magnetic induction coil has an induced potential, and the magnitude of the induced potential depends on the eddy current effect, that is, depends on the conductivity of the pan to be detected.
In addition, regarding the insulating material, the two magnetic induction coils of the pot detection unit 106 are regarded as a planar capacitor, the capacity of the capacitor changes along with the change of the dielectric constant of the insulating material, the output voltage of the magnetic induction coils can be read from the sampling resistor connected in series with the magnetic induction coils, wherein the magnetic induction coils can be metal wire coils obtained by etching copper films, and furthermore, the copper film grounding is used as a shielding layer to reduce external interference.
Because the materials of the pan body are different, the inherent thermal conductivity of the pan body is different, so that the temperature distribution of the area on the base plate where the pan body is placed and the temperature distribution of the area where the pan body is not placed are obviously different, and the identification of the placing area 200 of the pan body and the materials is realized based on the temperature distribution.
In any of the above technical solutions, optionally, the method further includes: the first insulating coating is coated on the surface of the pot detection module, and the first insulating coating is configured to eliminate electromagnetic interference of the pot detection module.
In any of the above technical solutions, optionally, the method further includes: a second insulating coating applied to a surface of the infrared heating coating 102, the second insulating coating configured to eliminate electromagnetic interference of the infrared heating coating 102.
In any of the above technical solutions, optionally, the method further includes: a prompt module 108 connected to the heating module and disposed on the surface of the substrate, wherein the prompt module 108 is configured to prompt the user about a cooking status parameter, such as "hot pot" for the current cooking function, and "heating power: 1000W ".
Wherein, the prompt module 108 may include at least one of a display screen, a speaker, and a communication transceiver.
Example two:
as shown in fig. 4 and 6, regarding the insulating material, the two magnetic induction coils of the pan detection unit 106 are regarded as a planar capacitor, the capacitance of which changes with the change of the dielectric constant of the insulating material, and the output voltage of the magnetic induction coil can be read from a sampling resistor connected in series with the magnetic induction coil, wherein the magnetic induction coil may be a metal wire coil obtained by etching a copper film, and further, the copper film is grounded to serve as a shielding layer to reduce external interference.
Because the materials of the pan body are different, the inherent thermal conductivity of the pan body is different, so that the temperature distribution of the area on the base plate where the pan body is placed and the temperature distribution of the area where the pan body is not placed are obviously different, and the identification of the placing area 200 of the pan body and the materials is realized based on the temperature distribution.
As shown in conjunction with FIGS. 1 and 2, the Lx-axis and the Ly-axis are used to read coordinate points of each of the magnetic sense coils, such as E (m，n) In a coordinate system including the Lx axis and the Ly axis, the output voltage of the magnetic induction coil having the coordinate point (m, n) is detected by the following method, specifically, the pot body placement region 200 and the size are detected as follows:
(1) Storing at least one set of specified excitation frequencies f without a pan body placed on the base plate of the hob 100 0 Output voltage value E of lower magnetic induction coil 0 And writing the data into the nonvolatile memory unit, wherein the operation can be completed when the product is delivered out of a factory or when the product is corrected.
(2) The heating module drives the pan detecting units 106 to heat according to the stored driving frequency, and each pan detecting unit 106 has an output voltage (i.e. a resonance voltage), and reads the output voltage value and stores the output voltage value in the data processing unit, as shown in fig. 5, if the first end 1062 of the first magnetic induction coil and the second end 1064 of the first magnetic induction coil (abbreviated as coil 1) input the excitation frequency, the first end 1066 of the second magnetic induction coil and the second end 1068 of the second magnetic induction coil (abbreviated as coil 2) have output voltage values.
(3) When E is (m，n) -E 0 Is greater than the output voltage threshold ^ EThen, the pan body is placed in the corresponding area of the substrate, and the position of the pan body and the size of the pan body are determined according to the determination, wherein ∑ E is preferably greater than 3, the corresponding relationship between each pan detection unit 106 and the output voltage is shown in table 1, and the numerical range of the output voltage is volt.
(4) As shown in table 1 (only a partial table, not all of which are shown) and fig. 2, the heating module that controls the heating zone 300 heats the pan body, and table 1 is a table corresponding to the temperature distribution.
TABLE 1
| E (5,1) | E (5,2) | E (5,3) | E (5,4) | E (5,5) | E (5,6) |
| 100 | 101 | 100 | 101 | 101 | 100 |
| E (4,1) | E (4,2) | E (4,3) | E (4,4) | E (4,5) | E (4,6) |
| 101 | 51 | 50 | 52 | 101 | 100 |
| E (3,1) | E (3,2) | E (3,3) | E (3,4) | E (3,5) | E (3,6) |
| 100 | 50 | 50 | 51 | 100 | 102 |
| E (2,1) | E (2,2) | E (2,3) | E (2,4) | E (2,5) | E (2,6) |
| 100 | 51 | 52 | 51 | 101 | 101 |
| E (1,1) | E (1,2) | E (1,3) | E (1,4) | E (1,5) | E (1,6) |
| 100 | 100 | 101 | 101 | 100 | 100 |
TABLE 2
| E (5,1) | E (5,2) | E (5,3) | E (5,4) | E (5,5) | E (5,6) |
| 00 | 0 | 0 | 0 | 0 | 0 |
| E (4,1) | E (4,2) | E (4,3) | E (4,4) | E (4,5) | E (4,6) |
| 0 | 50 | 50 | 52 | -50 | -48 |
| E (3,1) | E (3,2) | E (3,3) | E (3,4) | E (3,5) | E (3,6) |
| 0 | 51 | 50 | 51 | -50 | -51 |
| E (2,1) | E (2,2) | E (2,3) | E (2,4) | E (2,5) | E (2,6) |
| 0 | 49 | 52 | 51 | -51 | -50 |
| E (1,1) | E (1,2) | E (1,3) | E (1,4) | E (1,5) | E (1,6) |
| 0 | 0 | 0 | 0 | 0 | 0 |
(5) As shown in table 2 (only a partial table is used for illustration, and not all are represented) and fig. 3, the heating module group of the heating area 300 is controlled to heat the pot body, table 2 is a table corresponding to temperature change, that is, a table obtained by subtracting temperature distribution according to a preset time interval, as shown in fig. 3, a target area 400 is determined according to temperature change, and an infrared heating coating corresponding to the target area 400 is controlled to preheat, so as to improve the heating efficiency of the pot after moving.
Example three:
as shown in FIGS. 4 and 7, one of the magnetic induction coils of any pan detecting unit 106 is operated as a heating coil and the other magnetic induction coil is operated as a temperature measuring resistor, and the Tx axis and the Ty axis shown in FIGS. 1 and 2 are combined for reading a coordinate point of each thermistor R, such as T (p，q) The sampling temperature of the thermistor R having the coordinate point (p, q) in the coordinate system constituted by the Tx axis and the Ty axis, specifically, the detection scheme of the placement region 200 and the size of the pot body is as follows:
(1) Storing at least one set of specified excitation frequencies f without a pan body placed on the base plate of the hob 100 0 Sampling temperature T of lower magnetic induction coil 0 And writing the data into the nonvolatile memory unit, wherein the operation can be completed when the product is delivered from a factory or when the product is corrected.
(2) The heating module drives the pan detecting unit 106 to heat according to the stored driving frequency, each thermistor R has a sampling temperature at this time, the sampling temperature (the numerical range is centigrade) is read, and the sampling temperature is stored in the data processing unit.
(3) Because the thermal conductivity of the pot body is higher than that of air, the base plate of the corresponding placing area of the pot body absorbs more heat under the same excitation frequency applied to the magnetic induction coil based on the absorption effect of the pot body on the heat, and when the temperature value T of the area on the base plate is used as the temperature value T (x，y) And a temperature difference threshold T w When the difference between the values is greater than the preset value +, it is determined that the pot body to be heated is placed in the area, namely the area is the heating area 300.
(4) As shown in table 3 (which is only partially shown and does not represent the entirety) and fig. 2, the heating module that controls the heating zone 300 heats the pan body.
TABLE 3
| T (5,1) | T (5,2) | T (5,3) | T (5,4) | T (5,5) | T (5,6) |
| 50 | 51 | 50 | 51 | 51 | 50 |
| T (4,1) | T (4,2) | T (4,3) | T (4,4) | T (4,5) | T (4,6) |
| 51 | 36 | 35 | 36 | 51 | 50 |
| T (3,1) | T (3,2) | T (3,3) | T (3,4) | T (3,5) | T (3,6) |
| 50 | 37 | 35 | 36 | 50 | 52 |
| T (2,1) | T (2,2) | T (2,3) | T (2,4) | T (2,5) | T (2,6) |
| 50 | 36 | 36 | 37 | 51 | 51 |
| T (1,1) | T (1,2) | T (1,3) | T (1,4) | T (1,5) | T (1,6) |
| 50 | 50 | 51 | 51 | 50 | 50 |
The technical scheme of the invention is explained in detail by combining the attached drawings, the invention provides a cooking utensil, the pot detection module is arranged on the base plate, the detected temperature distribution is mainly used for determining the placement area of the pot body, the base plate of the placement area corresponding to the pot body absorbs more heat under the same excitation frequency applied to the magnetic induction coil based on the heat absorption effect of the pot body because the heat conductivity of the pot body is higher than that of air, the area with slower temperature rise is corresponding to the placement area of the pot body, and the size of the pot body can be determined.
The steps in the method of the invention can be sequentially adjusted, combined and deleted according to actual needs.
The units in the device of the invention can be merged, divided and deleted according to actual needs.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be implemented by program instructions associated with hardware, and the program may be stored in a computer-readable storage medium, which includes Read-Only Memory (ROM), random Access Memory (RAM), programmable Read-Only Memory (PROM), erasable Programmable Read-Only Memory (EPROM), one-time Programmable Read-Only Memory (OTPROM), electrically Erasable Programmable Read-Only Memory (EEPROM), an optical Disc-Read-Only Memory (CD-ROM) or other storage medium, a magnetic tape, or any other medium capable of storing data for a computer or other computer.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A cooking appliance, comprising:
a hob, a base plate of the hob configured to place a pan body, the hob comprising:
a heating module configured to heat the pan body;
a pot detection module disposed inside the hob, the pot detection module being configured to detect a temperature distribution and a temperature variation of the substrate at preset time intervals and to send the temperature distribution and the temperature variation to the heating module,
the heating module is configured to determine a placement area of the pot body on the base plate according to the temperature distribution and heat the pot body in the placement area, and the heating module is further configured to determine a target area where the pot body moves according to the temperature change and control the heating module to preheat the target area.
2. The cooking appliance of claim 1,
the heating module is also configured to determine a position change of the pot body according to the temperature change and the placement area, predict a target area for movement of the pot body according to the position change, and control the heating module to preheat the target area.
3. The cooking appliance according to claim 1 or 2, wherein the heating module comprises:
an infrared heating coating disposed on the substrate, the infrared heating coating configured to generate heat in response to received infrared radiation;
an infrared radiation emitter disposed on an underside of the infrared heating coating, the infrared radiation emitter configured to generate infrared radiation corresponding to a first heating power and directionally transmit the infrared radiation to the placement area,
and/or the infrared radiation emitter is further configured to generate and direct infrared radiation corresponding to a second heating power to the target area,
wherein the second heating power is less than or equal to the first heating power.
4. The cooking appliance of claim 1 or 2, wherein the pan detection module further comprises:
a pot detection coil array integrated on the substrate, wherein any pot detection unit in the pot detection coil array comprises at least two mutually coupled magnetic induction coils, any pot detection unit can independently heat the pot body and generate resonance voltage in the heating process,
wherein the resonance voltage is configured to determine the placement area, and/or to determine property information of the pan body, the property information comprising at least one parameter of a material, a shape, and a size of the pan body.
5. The cooking appliance of claim 4, wherein the pan detection module further comprises:
a temperature sensing array disposed integral to the substrate, the temperature sensing array configured to detect a temperature distribution across the substrate,
the temperature sensing array comprises a plurality of temperature sensing units, each temperature sensing unit can independently detect the temperature, and each temperature sensing unit comprises a thermistor connected with the magnetic sensing coil in series.
6. The cooking appliance of claim 5,
the outer diameter of the pot detection unit ranges from 5mm to 100mm.
7. The cooking appliance of claim 5,
the thickness range of the pot detection unit is 1 mm-5 mm.
8. The cooking appliance of claim 5,
the range of the line spacing of the pot detection units is 0.2 mm-5 mm.
9. The cooking appliance of claim 5, further comprising:
the electric inductance of the pot detecting unit is 0.5 uH-4 uH, the resistance of the pot detecting unit is 0.8 omega-3 omega, and the electric capacity of the pot detecting unit is 10 pF-80 pF.
10. The cooking appliance according to claim 1 or 2, further comprising:
the first insulating coating is coated on the surface of the pot detection module, and the first insulating coating is configured to eliminate the electromagnetic interference of the pot detection module.
11. The cooking appliance of claim 3, further comprising:
a second insulating coating applied to a surface of the infrared heating coating, the second insulating coating configured to eliminate electromagnetic interference of the infrared heating coating.
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| CN201910741664.6A CN112393283B (en) | 2019-08-12 | 2019-08-12 | Cooking utensil |
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| CN201910741664.6A CN112393283B (en) | 2019-08-12 | 2019-08-12 | Cooking utensil |
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