CN208058957U - Cookware material detection circuit and cooking apparatus - Google Patents
Cookware material detection circuit and cooking apparatus Download PDFInfo
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- CN208058957U CN208058957U CN201820384755.XU CN201820384755U CN208058957U CN 208058957 U CN208058957 U CN 208058957U CN 201820384755 U CN201820384755 U CN 201820384755U CN 208058957 U CN208058957 U CN 208058957U
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- 238000001514 detection method Methods 0.000 title claims abstract description 112
- 238000010411 cooking Methods 0.000 title claims abstract description 69
- 239000000463 material Substances 0.000 title claims abstract description 64
- 230000010355 oscillation Effects 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000005070 sampling Methods 0.000 claims description 41
- 239000003990 capacitor Substances 0.000 claims description 37
- 230000006698 induction Effects 0.000 claims description 27
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000000919 ceramic Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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Abstract
It includes controller, oscillation signal generation circuit, oscillating circuit and sample circuit that the utility model, which discloses a kind of cookware material detection circuit and cooking apparatus, cookware material detection circuit,；The input terminal of oscillation signal generation circuit is connect with signal output end, under the control action of controller, to generate the oscillator signal of predeterminated frequency；Oscillating circuit includes the inspection pot coil of the material for incuding cookware；Sample circuit is used to detect the voltage change on pot coil；The output end of sample circuit and the signal receiving end of controller connect；Controller judges the material of cookware according to the voltage that sample circuit detects.Therefore technical solutions of the utility model allow cooking apparatus to distinguish the cookware material type for the heating that is placed on it, and improve the safety of user's culinary art.
Description
Technical Field
The utility model relates to a cooking utensil field, in particular to pan material detection circuitry and cooking utensil.
Background
At present, cookware suitable for cooking utensils such as an induction cooker, an electric pressure cooker and the like can be generally divided into ceramic cookware and metal cookware, and for the metal cookware, the cooking utensils generally select high power to heat, but the ceramic pot can not be heated by the high power, otherwise the ceramic pot can be damaged; the existing induction cooker can not distinguish whether a metal pan or a ceramic pan is placed on the induction cooker for heating, and the ceramic pot is often heated by using high-power firepower, so that the service life of the ceramic pot is greatly shortened, and great danger is brought to a user when the induction cooker is used for cooking.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pan material detection circuitry, cooking utensil, aim at conveniently detecting and discerning the pan type that cooking utensil used.
In order to achieve the above object, the utility model provides a pan material detection circuitry for detect the pan material that supplies cooking utensil heating, include:
a controller having a signal output terminal and a signal receiving terminal;
the input end of the oscillation signal generating circuit is connected with the signal output end so as to generate an oscillation signal with a preset frequency under the control action of the controller;
the input end of the oscillating circuit is connected with the output end of the oscillating signal generating circuit, and the oscillating circuit comprises a pot detecting coil used for sensing the material of the pot;
the sampling circuit is used for detecting the voltage change on the pot detection coil; the output end of the sampling circuit is connected with the signal receiving end of the controller;
the controller is used for judging the material of the cookware according to the voltage detected by the sampling circuit, and the material of the cookware at least comprises a metal material and a ceramic material.
Preferably, the oscillation circuit is a series resonance circuit or a parallel resonance circuit.
Preferably, the oscillation circuit includes a first capacitance;
when the oscillating circuit is a series resonant circuit, the first end of the first capacitor is the input end of the oscillating circuit, and the second end of the first capacitor is connected with the first end of the pot detection coil; or,
when the oscillating circuit is a parallel resonant circuit, the first end of the first capacitor is the input end of the oscillating circuit and is connected with the first end of the pot coil, and the second end of the first capacitor is connected with the second end of the pot coil.
Preferably, the sampling circuit comprises an induction coil, the induction coil is used for being coupled with the pot detection coil, and two ends of the induction coil are electrically connected with the controller.
Preferably, the sampling circuit comprises a first diode, a first resistor, a second resistor, a third resistor and a second capacitor;
when the oscillation circuit is a series resonance circuit, the first end of the pan detection coil is connected with the anode of the first diode, the cathode of the first diode is connected with the first end of the first resistor, the second end of the first resistor is interconnected with the first end of the second resistor, the first end of the third resistor and the first end of the first capacitor, the second end of the second resistor is connected with the second end of the pan detection coil, and the second end of the third resistor is the output end of the sampling circuit; and the first end of the first capacitor is connected with the second end of the pot detection coil.
Preferably, the sampling circuit comprises a first diode, a first resistor, a second resistor, a third resistor and a second capacitor;
when the oscillation circuit is a parallel resonance circuit, the second end of the pot detection coil is connected with the anode of the first diode, the cathode of the first diode is connected with the first end of the first resistor, the second end of the first resistor is connected with the first end of the second resistor, the first end of the third resistor and the first end of the first capacitor, the second end of the second resistor is connected with the second end of the first capacitor, and the second end of the third resistor is the output end of the sampling circuit.
The utility model also provides a cooking utensil, include:
a main control board;
the cooking device comprises a cooking main body, a cooking module and a control module, wherein the cooking main body is provided with a bearing part for placing a pot; and
pan material detection circuitry, pan material detection circuitry examine pot coil and locate in the culinary art main part is last, and corresponds the bottom and/or the lateral part setting of pan, pan material detection circuitry passes through examine pot coil and detect the material of pan.
Preferably, the cooking appliance further comprises a display panel for displaying the working condition of the cooking appliance;
the main control panel and/or the display panel is electrically connected with a controller of the cookware material detection circuit, or
The main control board and/or the display board are/is a controller of the cookware material detection circuit.
Preferably, the pan detection coil is circular, square or oval.
Preferably, the cooking utensil is provided with a heating coil panel, and the pot detection coil is arranged corresponding to the center of the heating coil panel;
and the induction coil of the cookware material detection circuit is positioned at one side of the cookware, which is far away from the pot detection coil.
Preferably, the cooking appliance is an induction cooker, an electric cooker or an electric pressure cooker.
The oscillation signal generating circuit of the technical proposal of the utility model generates a special frequency under the action of the controller, and the oscillation circuit resonates under the frequency; the pot detection coil is arranged corresponding to the pot, so that the material of the pot and the distance from the pot detection coil can cause the inductance of the pot detection coil to change, and further the resonance state of the oscillation circuit is influenced. The sampling circuit detects the change of the oscillation voltage of the pot detection coil, so that the controller judges the material of the pot. Consequently the utility model discloses technical scheme makes cooking utensil can distinguish the pan material type of placing the heating above that, has improved the security of user's culinary art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a cooking appliance of the present invention;
FIG. 2 is a block diagram of the circuit structure of the pot material detection circuit of the present invention;
FIG. 3 is a circuit diagram of a first embodiment of the oscillator circuit of FIG. 2;
FIG. 4 is a circuit diagram of a second embodiment of the oscillator circuit of FIG. 2;
FIG. 5 is a circuit diagram of a sampling circuit corresponding to FIG. 3, employing a coupled sampling approach;
FIG. 6 is a circuit diagram of a sampling circuit corresponding to FIG. 4, employing a coupled sampling approach;
FIG. 7 is a circuit diagram of a sampling circuit corresponding to FIG. 3, employing a divided voltage sampling approach;
FIG. 8 is a circuit diagram of the sampling circuit of FIG. 4, using a divided voltage sampling scheme;
FIG. 9 is a schematic structural view of a first embodiment of the arrangement of a pan detecting coil on an induction cooker;
fig. 10 is a schematic structural view of a second embodiment of the arrangement of the pan detection coil on the induction cooker.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Cooking body | L2 | Induction coil |
| 20 | Heating device | R1 | A first resistor |
| 30 | Pot tool | R2 | Second resistance |
| L1 | Pot detection coil | R3 | Third resistance |
| 40 | Controller | D1 | First diode |
| 50 | Oscillation signal generating circuit | 80 | Electromagnetic oven |
| 60 | Oscillating circuit | 81 | Heating coil panel |
| 70 | Sampling circuit | 82 | Display panel |
| C1 | First capacitor | 83 | Connecting terminal |
| C2 | Second capacitor |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a pan material detection circuitry for detect the pan 30 material that supplies cooking utensil heating. The cooking appliance can be an electromagnetic heating cooking appliance and can also be a resistance heating cooking appliance; the cooking appliance may be an induction cooker 80, an electric rice cooker, or an electric pressure cooker. Referring to fig. 1, the cooking appliance includes a cooking main body 10 and a pot detection coil L1, the cooking main body 10 has a supporting portion for placing a pot 30, and the pot detection coil L1 is disposed on the cooking main body 10 and corresponds to the bottom of the pot 30. The pot material detection circuit detects the material of the pot 30 on the bearing part through the pot detection coil L1.
It will be appreciated that the metal content of the bottom or side wall of the pot 30 is different due to different types (different metal content), for example: the metal content of the bottom or side wall of the ceramic pot 30 is different from the metal content of the bottom or side wall of the metal pot 30. Therefore, when different types of pots 30 are placed on the supporting portion of the cooking appliance, the magnetic field generated by the bottom or the side wall of different types of pots 30 will cause the corresponding pot detection coil L1 to generate different inductance variations.
Referring to fig. 2, the pot material detection circuit includes a controller 40, an oscillation signal generation circuit 50, an oscillation circuit 60, and a sampling circuit 70. The controller 40 has a signal output terminal and a signal receiving terminal; the oscillator circuit has an input terminal and an output terminal, and the input terminal of the oscillator signal generating circuit 50 is connected to the signal output terminal to generate an oscillator signal with a predetermined frequency under the control of the controller 40. The input end of the oscillating circuit 60 is connected to the output end of the oscillating signal generating circuit 50, and the oscillating circuit 60 includes a pot detecting coil L1 for sensing the material of the pot 30. The sampling circuit 70 is used for detecting the voltage change on the pan detection coil L1; the output end of the sampling circuit 70 is connected with the signal receiving end of the controller 40; the controller 40 is used for judging the material of the pot 30 according to the voltage detected by the sampling circuit 70; the pot 30 at least comprises a metal material and a ceramic material. It can be understood that, can also be the marmite according to the material of pan 30, perhaps be based on metal pan 30, the utility model discloses technical scheme's pan material detection circuitry can also detect pan 30 specifically be aluminium pot, iron pan or other metal type's pan 30.
It should be explained here that when the pot 30 is close to the pot detection coil L1, the pot 30 is equivalent to the magnetic core of the pot detection coil L1, so that the metal magnetic core can change the inductance and the coupling degree of the inductance according to the i-shaped inductance principle. Therefore, the metal content of the cookware 30 made of different materials is different, so that the inductance of the cookware detection coil L1 is changed to different degrees, the resonance state of the oscillation circuit 60 is changed (embodied as oscillation waveform amplitude change), and further, the cookware 30 material is distinguished by detecting the voltage change on the cookware detection coil L1.
The oscillation signal generating circuit 50 of the technical solution of the present invention generates a specific frequency under the action of the controller 40, and the oscillation circuit 60 resonates at the specific frequency; since the pan detection loop L1 is disposed corresponding to the bottom of the pan 30, the material of the pan 30 and the distance from the pan detection loop L1 will cause the inductance of the pan detection loop L1 to change, and further affect the resonance state of the oscillation circuit 60. The sampling circuit 70 detects the change of the oscillating voltage of the pot detection coil L1, so that the controller 40 determines the material of the pot 30. Consequently the utility model discloses technical scheme makes cooking utensil can distinguish and places the 30 material types of pan of heating above that, has improved the security of user's culinary art.
The oscillation signal generating circuit 50 may be a PWM generator, or a PWM generating circuit constructed by IGBT, MOS, and triode, or a frequency generator for generating frequency.
Referring to fig. 3 and 4, the oscillating circuit 60 may be a series resonant circuit or a parallel resonant circuit. For example, the LC series resonant circuit or LC parallel resonant circuit, and may be an RLC series resonant circuit, an RLC parallel resonant circuit, or the like. The topological structure of the oscillating circuit 60 may be a single-tube resonance, a half-bridge resonance, such as a waveform, or a full-bridge resonance circuit, and in this scheme, an LC series resonance circuit or an LC parallel resonance circuit is preferably adopted; so as to simplify the circuit structure and reduce the circuit volume. Specifically; the oscillating circuit 60 comprises a first capacitor C1; when the oscillating circuit 60 is a series resonant circuit, a first end of the first capacitor C1 is an input end of the oscillating circuit 60, and a second end of the first capacitor C1 is connected to a first end of the pan coil L1; or, when the oscillating circuit 60 is a parallel resonant circuit, the first end of the first capacitor C1 is the input end of the oscillating circuit 60 and is connected to the first end of the pan detecting coil L1, and the second end of the first capacitor C1 is connected to the second end of the pan detecting coil L1. In practical applications, the first capacitor C1 is generally selected to be 0.1 to 100uf, and the inductance of the pot detection coil L1 is selected to be 1 to 1000 uh.
In the scheme, the purpose of distinguishing the materials of the cookware 30 is realized by detecting the change of the voltage at two ends of the cookware detecting coil L1. The sampling circuit 70 may be coupled/inductive/resonant, or a voltage-dividing scheme. Referring to fig. 5 and 6, when the coupled scheme is adopted, the sampling circuit 70 includes an induction coil L2, the induction coil L2 is configured to be coupled with the pan detecting coil L1, and a terminal of the induction coil L2 is electrically connected to the controller 40. The controller 40 detects a voltage change across the pan detection coil L1 by detecting a voltage change across the induction coil L2. Structurally, the induction coil L2 is disposed on a side of the pot detection coil L1 away from the pot 30.
Referring to fig. 7 and 8, when the sampling circuit 70 adopts a voltage division scheme and the oscillation circuit 60 is a series resonant circuit, the sampling circuit 70 includes a first diode D1, a first resistor R1, a second resistor R2, a third resistor R3, and a second capacitor C2; a first end of the pan detecting coil L1 is connected to an anode of the first diode D1, a cathode of the first diode D1 is connected to a first end of a first resistor R1, a second end of the first resistor R1 is interconnected with a first end of the second resistor R2, a first end of a third resistor R3, and a first end of a first capacitor C1, a second end of the second resistor R2 is connected to a second end of the pan detecting coil L1, and a second end of the third resistor R3 is an output end of the sampling circuit 70; the first end of the first capacitor C1 is connected with the second end of the pan coil L1.
When the sampling circuit 70 adopts a voltage division scheme and when the oscillation circuit 60 is a parallel resonant circuit, the sampling circuit 70 includes a first diode D1, a first resistor R1, a second resistor R2, a third resistor R3, and a second capacitor C2. The second end of the pan detecting coil L1 is connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the first end of the second resistor R2, the first end of the third resistor R3 and the first end of the first capacitor C1, the second end of the second resistor R2 is connected to the second end of the first capacitor C1, and the second end of the third resistor R3 is the output end of the sampling circuit 70.
The first diode D1 plays a role in rectification, and a rectifying diode with a smaller conduction voltage drop is generally selected; the resistances of the first resistor R1 and the second resistor R2 are selected according to actual conditions, and generally, resistors with the resistance of 1K-10M can be selected, the second capacitor C2 is a filter capacitor, an electrolytic capacitor or a chip capacitor can be selected, the capacitance range is 0.01-100 uf, the third resistor R3 is a current-limiting resistor, and the resistance range is 100R-1M. The voltage-dividing sampling circuit 70 outputs a dc voltage, specifically a bias voltage greater than or equal to or less than 0V.
The oscillation circuit 60 operates at the natural oscillation frequency f, and when there is no metal object near the pan detection coil L1, the peak voltage of the oscillation waveform of the pan detection coil L1 sampled by the sampling circuit 70 is V0. If the metal pot 30 is above the pot detection coil L1, the peak voltage of the oscillation waveform of the pot detection coil L1 becomes V1 at the oscillation frequency f; if the pot 30 made of ceramic material is above the pot detection coil L1, the peak voltage of the oscillation waveform of the pot detection coil L1 becomes V2 at the oscillation frequency f; wherein V0> V2> V1. Therefore, the material type of the pot 30 can be determined by the peak voltage of the oscillation waveform of the pot detection coil L1, and the ceramic pot is further distinguished from other metal pots 30.
The utility model also provides a cooking appliance, please refer to fig. 1, the cooking appliance comprises a main control board for controlling the operation of the cooking appliance, a cooking main body 10, and a pot material detection circuit; the cooking body 10 is provided with a bearing part for placing a pot 30; pot material detection circuitry's examination pot coil L1 is located on cooking main part 10, and correspond the bottom setting of pan 30, pot material detection circuitry passes through examine pot coil L1 and detect and arrange in the material of pan 30 on the supporting part. The cooking appliance may further include a display panel 82, and the display panel 82 is used for displaying the working condition of the cooking appliance. Here, when the cooking appliance is the induction cooker 80, the bearing part is a heating panel of the induction cooker 80.
Referring to fig. 9 and 10, the controller 40 of the pot material detection circuit may be a separate component, and the controller 40 is electrically connected to the main control board and/or the display board 82; the main control board and/or the display board 82 may also be the controller 40 of the pot material detection circuit.
It is exemplified here by an electromagnetic oven 80, the electromagnetic oven 80 has a heating panel, and a heating coil panel 81 located below the heating panel, the pot detection coil L1 is correspondingly disposed above the heating coil panel 81 and disposed close to the heating panel, the induction coil L2 is disposed on one side of the heating coil panel 81 far away from the pot 30, and the end of the pot detection coil L1 is preferably provided with a connection terminal 83 for connecting with a main control panel or a display panel 82.
Based on the above embodiment, the cooking main body 10 has the installation cavity, so that the pot detection coil L1 can be disposed in the installation cavity, and the pot detection coil L1 is located below the bearing part, so that the pot detection coil L1 detects the bottom of the pot 30, and the detection accuracy of the pot detection coil L1 is improved. For example: when the cooking appliance is the induction cooker 80, the pan detection coil L1 may be disposed below the carrying portion.
Of course, the pan detecting coil L1 may be located at other positions of the cooking appliance, and may be determined according to the structure of the cooking appliance. For example: when the cooking appliance is an electric cooker, an electric pressure cooker, or the like, which generally includes an outer pot and an inner pot (i.e., the pot 30) disposed in the outer pot, the pot detection coil L1 may be disposed on the sidewall of the outer pot to detect the magnetic field generated by the sidewall of the inner pot, thereby determining the type of the pot 30.
In addition, the number of pot detection coils L1 may be one or more, and of course, when the number of pot detection coils L1 is more, the detection result is more accurate. In addition, when the number of pot detection coils L1 is plural, all pot detection coils L1 may be disposed below the carrying part; all pot detection coils L1 can be arranged corresponding to the side wall of the pot 30 to detect the magnetic field generated by the side wall of the pot 30; it is also possible to arrange a part of the pot coil L1 under the carrying part and another part corresponding to the side wall of the pot 30 to detect the magnetic field generated by the bottom and the side wall of the pot 30 at the same time. On the other hand, the pan detecting coil L1 may have various shapes such as a circle, a square, or an ellipse.
On the basis of any of the above embodiments, optionally, the cooking body 10 of the cooking appliance further has a heating device 20 installed in the mounting cavity thereof, the heating device 20 is located below the carrying portion to heat the bottom of the pot 30, in this embodiment, the pot detection coil L1 may be located between the heating device 20 and the carrying portion, so that the pot detection coil L1 is closer to the bottom of the pot 30, and the detection accuracy of the pot detection coil L1 is improved. Wherein, the bearing part has upper surface and lower surface that the back of the body is carried, further, can examine pot coil L1 setting on the lower surface of bearing part to further reduce the distance of examining between pot coil L1 and the pan 30 bottom, improve and examine pot coil L1's detection accuracy. When the cooking appliance is an electromagnetic cooking device, the cooking appliance has a heating coil panel 81, and the pan detection coil L1 is preferably disposed corresponding to the center of the heating coil panel 81.
It should be noted that the pan detection coil L1 can be mounted on the lower surface of the carrying portion by means of sticking, snapping, etc., and the present embodiment is not limited thereto.
Since the user generally places the pot 30 directly above the heating device 20 when using the cooking appliance for cooking, in this embodiment, the pot detection coil L1 can be further disposed on the heating device 20, so that the pot detection coil L1 is located directly below the bottom of the pot 30, thereby further improving the detection accuracy of the pot detection coil L1.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (11)
1. A pan material detection circuitry for detecting the material of a pan (30) that is heated by a cooking appliance, comprising:
a controller (40), the controller (40) having a signal output and a signal receiving;
the oscillation signal generating circuit (50) is provided with an input end and an output end, and the input end of the oscillation signal generating circuit (50) is connected with the signal output end so as to generate an oscillation signal with a preset frequency under the control action of the controller;
the input end of the oscillating circuit (60) is connected with the output end of the oscillating signal generating circuit (50), and the oscillating circuit (60) comprises a pot detecting coil used for sensing the material of the pot (30);
a sampling circuit (70) for detecting a change in voltage on the caldron coil; the output end of the sampling circuit (70) is connected with the signal receiving end of the controller (40);
the controller is used for judging the material of the cookware (30) according to the voltage detected by the sampling circuit (70), and the material of the cookware (30) at least comprises metal material and ceramic material.
2. The cookware material detection circuit according to claim 1, wherein the oscillation circuit (60) is a series resonance circuit or a parallel resonance circuit.
3. The cookware material detection circuit according to claim 1, wherein said oscillating circuit (60) comprises a first capacitor (C1);
when the oscillating circuit is a series resonant circuit, a first end of the first capacitor (C1) is an input end of the oscillating circuit, and a second end of the first capacitor (C1) is connected with a first end of the pot detection coil; or,
when the oscillating circuit is a parallel resonant circuit, the first end of the first capacitor (C1) is the input end of the oscillating circuit and is connected with the first end of the pot detection coil, and the second end of the first capacitor (C1) is connected with the second end of the pot detection coil.
4. The pot material detection circuit according to claim 1, wherein the sampling circuit (70) comprises an induction coil (L2), the induction coil (L2) is used for coupling with the pot detection coil, and two ends of the induction coil (L2) are electrically connected with the controller.
5. The pot material detection circuit according to claim 1, wherein the sampling circuit (70) comprises a first diode (D1), a first resistor (R1), a second resistor (R2), a third resistor (R3), and a second capacitor (C2);
when the oscillation circuit is a series resonant circuit, the first end of the pan detection coil is connected with the anode of the first diode (D1), the cathode of the first diode (D1) is connected with the first end of a first resistor (R1), the second end of the first resistor (R1) is interconnected with the first end of the second resistor (R2), the first end of a third resistor (R3) and the first end of a first capacitor (C1), the second end of the second resistor (R2) is connected with the second end of the pan detection coil, and the second end of the third resistor (R3) is the output end of the sampling circuit (70); the first end of the first capacitor (C1) is connected with the second end of the pan detection coil.
6. The pot material detection circuit according to claim 1, wherein the sampling circuit (70) comprises a first diode (D1), a first resistor (R1), a second resistor (R2), a third resistor (R3), and a second capacitor (C2);
when the oscillation circuit is the parallel resonance circuit, the second end of pot coil is examined with the anode of first diode (D1) is connected, the cathode of first diode (D1) is connected with the first end of first resistance (R1), the second end of first resistance (R1) with the first end of second resistance (R2), the first end of third resistance (R3), the first end of first electric capacity (C1) interconnect, the second end of second resistance (R2) with the second end of first electric capacity (C1) is connected, the second end of third resistance (R3) is the output of sampling circuit (70).
7. A cooking appliance, comprising:
a main control board;
a cooking body (10), wherein the cooking body (10) is provided with a bearing part for placing a pan (30); and
the pot material detection circuit of any one of claims 1 to 6, wherein a pot detection coil of the pot material detection circuit is disposed on the cooking body (10) and corresponding to the bottom and/or side of the pot (30) (30), and the pot material detection circuit detects the material of the pot (30) through the pot detection coil.
8. The cooking appliance according to claim 7, wherein the cooking appliance further comprises a display panel (82), the display panel (82) being used for displaying the working condition of the cooking appliance;
the main control panel and/or the display panel (82) are electrically connected with a controller of the cookware material detection circuit, or
The main control board and/or the display board (82) are/is a controller of the cookware material detection circuit.
9. The cooking appliance of claim 7, wherein the pan detection coil is circular, square, or oval.
10. The cooking appliance according to claim 7, wherein the cooking appliance has a heating coil panel (81), and the pot detection coil is disposed corresponding to a center of the heating coil panel (81);
and the induction coil (L2) of the pot material detection circuit is positioned at one side of the pot (30) far away from the pot detection coil (L1).
11. The cooking appliance according to any one of claims 7 to 10, wherein the cooking appliance is an induction cooker, an electric cooker or an electric pressure cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820384755.XU CN208058957U (en) | 2018-03-20 | 2018-03-20 | Cookware material detection circuit and cooking apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820384755.XU CN208058957U (en) | 2018-03-20 | 2018-03-20 | Cookware material detection circuit and cooking apparatus |
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| CN208058957U true CN208058957U (en) | 2018-11-06 |
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| CN201820384755.XU Active CN208058957U (en) | 2018-03-20 | 2018-03-20 | Cookware material detection circuit and cooking apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111568157A (en) * | 2020-06-17 | 2020-08-25 | 小熊电器股份有限公司 | Breakfast machine |
| CN114060862A (en) * | 2020-07-30 | 2022-02-18 | 青岛海尔智能技术研发有限公司 | Dry burning prevention method and device for cookware and cookware |
-
2018
- 2018-03-20 CN CN201820384755.XU patent/CN208058957U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111568157A (en) * | 2020-06-17 | 2020-08-25 | 小熊电器股份有限公司 | Breakfast machine |
| CN114060862A (en) * | 2020-07-30 | 2022-02-18 | 青岛海尔智能技术研发有限公司 | Dry burning prevention method and device for cookware and cookware |
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