CN111374528B - Electric rice cooker - Google Patents
Electric rice cooker Download PDFInfo
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- CN111374528B CN111374528B CN201811653594.0A CN201811653594A CN111374528B CN 111374528 B CN111374528 B CN 111374528B CN 201811653594 A CN201811653594 A CN 201811653594A CN 111374528 B CN111374528 B CN 111374528B
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- heating coil
- magnetic field
- capacitor
- rice cooker
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
Abstract
The invention discloses an electric cooker which comprises a cooker body, wherein the cooker body comprises a cooker shell and an inner pot accommodated in the cooker shell, a resonance circuit is arranged in the cooker shell and comprises a first heating coil, the first heating coil surrounds the inner pot and extends spirally along the direction from a pot opening to a pot bottom of the inner pot, and the inner pot generates vortex and heats according to a first alternating magnetic field output by the resonance circuit. In the process of acquiring energy, the inner pot reduces the times of energy conversion and improves the energy transmission efficiency.
Description
Technical Field
The invention relates to the technical field of electric cookers, in particular to an electric cooker.
Background
An electric cooker is a cooker which can convert electric energy into internal energy. The existing electric rice cooker can be roughly divided into two types according to the working principle: one is a common rice cooker which utilizes an aluminum alloy disc to heat and transfer heat to an inner container of the electric cooker, and the common rice cooker is in the early stage of the appearance of the rice cooker; the other type is the currently popular IH heating electric cooker, that is, the inner container of the electric cooker made of metal material generates eddy current in a high-frequency alternating magnetic field by utilizing the principle of electromagnetic induction heating (induction heating) to achieve the purpose of heating the inner container.
The tailless electric cooker is an electric cooker adopting a wireless power transmission technology, and the electric cooker achieves the purpose that a cooker body obtains electric energy through the wireless power transmission technology under the condition of not using a power line for connection so as to normally work.
The tail-free electric rice cooker on the market has the problems of low efficiency and large volume due to the occurrence of multiple times of energy conversion and heat transfer.
Disclosure of Invention
The invention mainly aims to provide an electric cooker, aiming at improving the heating efficiency of the electric cooker and reducing the whole volume.
In order to achieve the above object, the present invention provides an electric rice cooker comprising:
the cooker body comprises a rice cooker shell and an inner pot contained in the rice cooker shell;
a resonant circuit is arranged in the rice cooker shell and comprises a first heating coil, the first heating coil surrounds the inner cooker and extends spirally along the direction from the cooker opening to the cooker bottom of the inner cooker, and the inner cooker generates eddy current and heats according to a first alternating magnetic field output by the resonant circuit.
Optionally, the inner pan has a first section near the pan bottom and a second section near the pan opening, and the first heating coil is arranged corresponding to the first section;
the resonant circuit further comprises a second heating coil and a first capacitor, the second heating coil surrounds the inner pot and corresponds to the position of the second section, one end of the first heating coil is connected with one end of the second heating coil through the first capacitor, and the other end of the first heating coil is connected with the other end of the second heating coil.
Optionally, the resonant circuit further comprises a second capacitor; the first heating coil is connected with the first capacitor in series, and the second heating coil is connected with the second capacitor in series;
or the first heating coil, the first capacitor, the second heating coil and the second capacitor are connected in series in sequence.
Optionally, the inner pan further has a third section located between the first section and the second section, and the resonant circuit further includes at least one third heating coil located in the third section, and at least one of the third heating coils is connected to an adjacent heating coil through at least one capacitor.
Optionally, the electric cooker further comprises:
the base is provided with an energy transmitting module for generating a second alternating magnetic field;
the cooker body is positioned on the base, and the resonant circuit induces the second alternating magnetic field generated by the energy transmitting module to generate oscillation and output a first alternating magnetic field surrounding the inner pot.
Optionally, the cooker body further includes a cover disposed on the rice cooker outer shell to cover the inner pot, the cover is provided with an energy receiving module and a control panel for inducing the first alternating magnetic field and converting and outputting a dc power, and the energy receiving module outputs the dc power to the control panel.
Optionally, the pot cover is further provided with a first wireless communication module, and the base is further provided with a second wireless communication module; the energy receiving module also outputs the direct current power supply to the first wireless communication module, and the control panel is used for receiving a user instruction and outputting a control signal to control the energy transmitting module to work through the first wireless communication module and the second wireless communication module.
Optionally, the energy transmitting module includes a power interface disposed on the base, and a power module, a driving module and a transmitting module disposed in the base, the power module receives the commercial power through the power interface and converts the output alternating current to output to the transmitting module under the control of the driving module, and the transmitting module receives the alternating current and generates a second alternating magnetic field.
Optionally, the power module includes a first rectifying and filtering circuit and an inverter circuit, a power input end of the first rectifying and filtering circuit is connected to the power interface, a power output end of the first rectifying and filtering circuit is connected to a power input end of the inverter circuit, a power output end of the inverter circuit is connected to a power input end of the transmitting end resonance module, and a controlled end of the inverter circuit is connected to the control end of the driving module.
Optionally, the transmitting module comprises a transmitting coil and a transmitting capacitor, the transmitting coil and the transmitting capacitor receiving the alternating current output by the power module and inducing a second alternating magnetic field.
Optionally, the energy receiving module includes a receiving coil, a receiving capacitor, a second rectifying and filtering circuit, and a voltage stabilizing circuit, where the receiving coil and the receiving capacitor induce the first alternating magnetic field and output alternating current, and the alternating current is converted by the second rectifying and filtering circuit and the voltage stabilizing circuit to output the dc power supply.
The electric cooker comprises a cooker body, wherein the cooker body comprises a cooker shell and an inner pot accommodated in the cooker shell, a resonance circuit is arranged in the cooker shell and comprises a first heating coil, the first heating coil surrounds the inner pot and extends spirally along the direction from a pot opening of the inner pot to a pot bottom, the cooker body is placed on a base capable of generating an alternating magnetic field, the resonance circuit induces the first alternating magnetic field according to the alternating magnetic field generated by the base, and the inner pot generates vortex and heats according to the first alternating magnetic field output by the resonance circuit. The inner pot reduces the times of energy conversion and improves the energy transmission efficiency in the process of acquiring energy. Moreover, the inner pot generates eddy current under the combined action of the alternating magnetic field generated by the base and the first alternating magnetic field generated by the resonant circuit to obtain internal energy, the magnetic field oscillates more violently, and the heating efficiency is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 view of an embodiment of an electric rice cooker of the present invention;
FIG. 2 is a schematic view of a resonant circuit in the first embodiment of the electric rice cooker of the present invention;
FIG. 3 is a schematic view of the magnetic field lines of the resonant circuit of the rice cooker of the first embodiment of the present invention;
FIG. 4 is a schematic view of a resonant circuit in a second embodiment of the electric rice cooker of the present invention;
FIG. 5 is an equivalent schematic view of a resonant circuit in a second embodiment of the electric rice cooker of the present invention;
FIG. 6 is a schematic view of a resonant circuit in a third embodiment of the electric rice cooker of the present invention;
FIG. 7 is an equivalent schematic view of a resonant circuit in a third embodiment of the electric rice cooker of the present invention;
FIG. 8 is a schematic view of a resonant circuit in a fourth embodiment of the electric rice cooker of the present invention;
FIG. 9 is an equivalent schematic view of a resonant circuit in a fourth embodiment of the electric rice cooker of the present invention;
FIG. 10 is a schematic view of a resonant circuit in a fifth embodiment of the electric rice cooker of the present invention;
FIG. 11 is an equivalent schematic view of a resonant circuit in a fifth embodiment of the electric rice cooker of the present invention;
FIG. 12 is a schematic view of a resonant circuit in a sixth embodiment of the electric rice cooker of the present invention;
FIG. 13 is an equivalent schematic view of a resonant circuit in a sixth embodiment of the electric rice cooker of the present invention;
FIG. 14 is a schematic view of functional modules of an electric rice cooker according to another embodiment of the present invention;
FIG. 15 is a schematic view of a circuit structure of an electric rice cooker according to another embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | |
| 1 | Base seat | L1 | First heating coil | |
| 2 | Pot body | L2 | |
|
| 3 | Pot cover | L3 | |
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| 11 | Power supply interface | C1 | |
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| 12 | Power module | C2 | |
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| 13 | Transmitting module | C3 | |
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| 14 | Drive module | C4 | |
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| 15 | Second wireless communication module | LC1 | |
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| 21 | Rice cooker shell | LC2 | |
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| 22 | Inner pot | D1 | |
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| 23 | Resonant circuit | D2 | |
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| 31 | Energy receiving module | Q1 | |
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| 32 | Control panel | Q2 | |
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| 33 | First wireless communication module | | Transmitting coil | |
| 121 | First rectifying and filtering circuit | FC | Transmitting |
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| 122 | Inverter circuit | RL | Receiving |
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| 321 | Second rectifying and filtering circuit | RC | Receiving |
|
| 322 | Voltage stabilizing circuit |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the descriptions relating to "first", "second", etc. in the present invention are for descriptive purposes only and are 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 meaning of "and/or" appearing throughout is: the method comprises three parallel schemes, wherein the scheme is taken as an A/B (A/B) as an example, the scheme comprises the scheme A, the scheme B or the scheme A and the scheme B simultaneously satisfy, in addition, the technical schemes between the various embodiments can be combined with each other, but the technical schemes must be based on the realization of the technical schemes by a person skilled in the art, and when the technical schemes are mutually contradictory or can not be realized, the combination of the technical schemes is not considered to exist, and the protection scope of the invention is not within the protection scope of the invention.
The invention provides an electric cooker.
Referring to fig. 1 and 2, fig. 1 is a schematic structural view of an embodiment of an electric rice cooker of the present invention, and fig. 2 is a schematic structural view of a resonant circuit in a first embodiment of the electric rice cooker of the present invention, the electric rice cooker including:
a pot body 2 comprising a rice pot housing 21 and an inner pot 22 accommodated in the rice pot housing 21;
a resonant circuit 23 is arranged in the rice cooker outer shell 21, the resonant circuit 23 comprises a first heating coil L1, the first heating coil L1 surrounds the inner pan 22 and extends spirally along the pan mouth to pan bottom direction of the inner pan 22, and the inner pan 22 generates eddy current and heats according to a first alternating magnetic field output by the resonant circuit 23.
In this embodiment, the pot body 2 can be placed on the base 1 of the electric rice cooker, the base 1 generates a high-frequency alternating magnetic field after being connected with alternating current, the pot body 2 is placed on the base 1 and wirelessly transmits power to heat the inner pot 22 with the base 1, the pot body 2 can also be placed on other electromagnetic heating platforms, such as an electromagnetic oven, so as to obtain electric energy through a wireless power transmission mode, therefore, the electric rice cooker does not need to be configured with a fixed base and a fixed power line, meanwhile, the relative position of the electric rice cooker and the base can be rotated, so that the use scene is wider, and similarly, the pot body 2 can also be configured with a corresponding base 1 to bear the pot body 2 and heat the inner pot 22.
The inner pot 22 is arranged in the rice cooker shell 21, the inner pot 22 can be made of metal materials such as stainless steel and titanium alloy, an annular accommodating cavity is formed between the inner pot 22 and the rice cooker shell 21, the resonant circuit 23 is arranged in the annular accommodating cavity, and the rice cooker shell 21 and the inner pot 22 are correspondingly arranged in shape and can be circular, oval and the like.
The resonant circuit 23 comprises a first heating coil which surrounds the inner pot and extends spirally along the direction from the pot opening to the pot bottom of the inner pot 22, it can be understood that the resonant circuit 23 further comprises a resonant capacitor which is connected in series with the first heating coil, the resonant circuit 23 induces a first alternating magnetic field under the action of the alternating magnetic field generated by the base, as shown in fig. 3, fig. 3 is a schematic view of a magnetic field line of the resonant circuit in the first embodiment of the electric cooker of the present invention, and the inner pot 22 can generate an eddy current under the combined action of the alternating magnetic field generated by the base 1 and the first alternating magnetic field, so as to obtain the internal energy.
Meanwhile, in order to avoid the problem of open circuit damage caused by external factors such as oxidation or physical collision of the first heating coil L1 and the resonant capacitor, an annular shell is further arranged inside the cooker body 2 and is adapted to the rice cooker shell so as to seal the resonant circuit 23 in the accommodating cavity.
It is understood that the number of turns, length, cross section, inductance and other parameters of the first heating coil L1 can be selected according to the actual heating power, size and other requirements of the rice cooker, and the capacitance of the first capacitor C1 can also be selected according to the actual situation without limitation.
In this embodiment, the base 1 and the pot body 2 are separated, the pot body 2 is placed on the base 1 and performs wireless power transmission with the base 1 to heat the inner pot 22, the base 1 serves as a transmitting end of the wireless power transmission, the commercial power is input to the base 1 through a power line, an energy transmitting module inside the base converts the commercial power and outputs an alternating magnetic field, a resonant circuit inside the pot body 3, which is composed of a first heating coil L1 and a first capacitor C1, induces and generates an alternating current under the action of the alternating magnetic field generated by the base, the first heating coil L1 and the first capacitor C1 generate a first alternating magnetic field that surrounds the inner pot 22 in a three-dimensional manner under the action of the alternating current, the inner pot 22 generates an eddy current under the action of the alternating magnetic field to obtain internal energy, and the inner pot 22 can also receive the alternating magnetic field generated by the base 1 and generate the eddy current to obtain the internal energy to accelerate the heating speed of the inner pot 22, in addition, in the process of acquiring energy, the inner pot 22 does not need to convert energy through a heating chassis or a coil, so that the frequency of energy conversion is reduced, and the energy transmission efficiency is improved.
The electric cooker comprises a cooker body 2, wherein the cooker body 2 comprises a cooker outer shell 21 and an inner pot 22 accommodated in the cooker outer shell, a resonant circuit 23 is arranged in the cooker outer shell, the resonant circuit 23 comprises a first heating coil L1, the first heating coil L1 surrounds the inner pot 22 and extends spirally along the direction from a pot opening of the inner pot 22 to a pot bottom, the cooker body 2 is placed on a base 1 capable of generating an alternating magnetic field, the resonant circuit 23 induces a first alternating magnetic field according to the alternating magnetic field generated by the base, and the inner pot 22 generates eddy currents according to the first alternating magnetic field output by the resonant circuit 23 and heats. The inner pot 22 reduces the number of times of energy conversion and improves the energy transmission efficiency in the process of acquiring energy. Moreover, the inner pot 22 generates eddy current under the combined action of the alternating magnetic field generated by the base 1 and the first alternating magnetic field generated by the resonant circuit 23 to obtain internal energy, the magnetic field oscillates more intensely, and the heating efficiency is higher.
As shown in fig. 4 and fig. 5, fig. 4 is a schematic structural diagram of a resonant circuit in a second embodiment of the electric cooker of the present invention, fig. 5 is an equivalent schematic diagram of the resonant circuit in the second embodiment of the electric cooker of the present invention, in this embodiment, the inner pan 22 has a first section near the bottom of the inner pan and a second section near the mouth of the inner pan, and the first heating coil L1 is disposed corresponding to the first section;
the resonant circuit 23 further includes a second heating coil L2 and a first capacitor C1, the second heating coil L2 surrounds the inner pan 22 and is disposed corresponding to the second segment, one end of the first heating coil L1 is connected to one end of the second heating coil L2 through the first capacitor C1, and the other end of the first heating coil L1 is connected to the other end of the second heating coil L2.
In this embodiment, the first heating coil L1 is concentrically arranged around the bottom of the pan and forms a first heating section, the second heating coil L2 is concentrically arranged around the opening of the pan and forms a second heating section, the first heating coil L1 and the second heating coil L2 generate series resonance under the action of the alternating magnetic field generated by the base 1 and generate a surrounding first alternating magnetic field, the inner pan 22 generates eddy current heating under the action of the alternating magnetic field generated by the base 1 and the first alternating magnetic field, the magnetic fields at the first section and the second section of the inner pan 22 are stronger, the eddy current is stronger, and the heating effect of the inner pan 22 is more obvious.
As shown in fig. 6 and 7, fig. 6 is a schematic structural diagram of a resonant circuit in a third embodiment of the electric rice cooker of the present invention, fig. 7 is a schematic equivalent diagram of the resonant circuit in the third embodiment of the electric rice cooker of the present invention, as shown in fig. 8 and 9, fig. 8 is a schematic structural diagram of the resonant circuit in a fourth embodiment of the electric rice cooker of the present invention, fig. 9 is a schematic equivalent diagram of the resonant circuit in the fourth embodiment of the electric rice cooker of the present invention, and the resonant circuit 23 further includes a second capacitor C2;
the first heating coil L1 is connected in series with the first capacitance C1, and the second heating coil L2 is connected in series with the second capacitance C2;
or the first heating coil L1, the first capacitor C1, the second heating coil L2 and the second capacitor C2 are connected in series in this order.
In this embodiment, the first heating coil L1 is located in the first heating section, the second heating coil L2 is located in the second heating section, the first capacitor C1 and the second capacitor C2 may be correspondingly disposed, the first capacitor C1 and the second capacitor C2 may be respectively connected to the first heating coil L1 and the second heating coil L2 to form two series resonance units, the two resonance units respectively induce the alternating magnetic field generated by the base and respectively and correspondingly generate the alternating magnetic field, and the inner pan 22 generates eddy current heating under the combined action of the alternating magnetic field generated by the base 1 and the alternating magnetic fields generated by the two resonance units.
The first capacitor C1, the second capacitor C2, the first heating coil L1 and the second heating coil L2 may also be connected in series to form a series resonant circuit, when the capacitors and the heating coils are connected in series to form a series resonant circuit, the series resonant circuit induces the second alternating magnetic field and generates the first alternating magnetic field, and the inner pot 22 generates eddy current and heats under the action of the resonant circuit.
The connection modes of the first capacitor C1, the second capacitor C2, the first heating coil L1 and the second heating coil L2 can be set according to actual requirements.
As shown in fig. 10 to 13, fig. 10 is a schematic structural diagram of a resonant circuit in a fifth embodiment of the electric cooker of the present invention, fig. 11 is a schematic equivalent diagram of the resonant circuit in the fifth embodiment of the electric cooker of the present invention, fig. 12 is a schematic structural diagram of the resonant circuit in a sixth embodiment of the electric cooker of the present invention, fig. 13 is a schematic equivalent diagram of the resonant circuit in the sixth embodiment of the electric cooker of the present invention, the inner pan 22 further has a third section located between the first section and the second section, the resonant circuit 23 further includes at least one third heating coil L3 located in the third section, and at least one of the third heating coils L3 is respectively connected to adjacent heating coils through at least one capacitor. In this embodiment, the third section of the inner pan 22 is located between the first section and the second section, in order to improve the heating efficiency of the inner pan 22, at least one third heating coil L3 may be further provided at the third section of the inner pan 22 to heat the middle portion of the inner pan 22, one or more third heating coils L3 may be provided at the third section of the inner pan 22, when one third heating coil L3 is provided, the third heating coil L3 may be further connected to the first heating coil L1 and the second heating coil L2 through one or two capacitors, respectively, to form the resonant circuit 23, when a plurality of third heating coils L3 are provided at the third section of the inner pan 22, for example, two third heating coils L3 may be provided, one third heating coil L3 is close to the first heating coil L1, the other third heating coil L3 is close to the second heating coil L2, and the third heating coil L3 close to the first heating coil L1 may be connected to the first L heating coil 1 through at least one capacitor, and also to the third heating coil L3 adjacent to the second heating coil L1 through at least one capacitor, i.e., each adjacent heating coil is connected to each other through a capacitor to form the series resonant circuit 23.
It should be noted that the capacitance and the number of turns of the heating coils at the third section position of the inner pan 22 can be selected according to the volume and the height of the inner pan 22, for example, when the inner pan 22 has a large volume and a high height, a plurality of third heating coils L3 can be arranged at the third section position of the inner pan 22, the number of turns of each third heating coil L3 can be correspondingly increased, and when the inner pan 22 has a moderate volume and a moderate height, one heating coil can be arranged at the third section position of the inner pan 22, and therefore, no specific limitation is made.
In an optional embodiment, the rice cooker further comprises:
the device comprises a base 1, wherein the base 1 is provided with an energy transmitting module for generating a second alternating magnetic field;
the cooker body 2 is positioned on the base 1, and the resonant circuit 23 induces the second alternating magnetic field generated by the energy emission module to generate oscillation and output a first alternating magnetic field surrounding the inner pot 22.
In this embodiment, the electric rice cooker may further be configured with a base 1 for heating the inner pot 22 in the pot body 2, the base 1 and the pot body 2 are in a separated state, the pot body 2 is placed on the base 1 and realizes wireless power transmission with the base 1 for heating the inner pot 22, the base 1 is used as a transmitting end of the wireless power transmission and includes a housing and an energy transmitting module arranged in the housing, the utility power is input to the base 1 through a power line, the energy transmitting module converts and outputs the utility power, the energy transmitting module includes a power module 12 and a transmitting module 13, the transmitting module 13 includes a transmitting coil FL and a transmitting capacitor FC, and may further include a driving module 14 for controlling the power module 12 to work, specifically set according to actual conditions, the power module 12 is used for performing conversion work such as rectification and inversion on the utility power and outputs an alternating current of about 30khz, the alternating current generates a second alternating magnetic field through the transmitting module 13, a resonant circuit which is arranged in the cooker body 3 and is composed of a first heating coil L1 and a first capacitor C1 is used for inducing and generating alternating current under the action of a second alternating magnetic field, the first heating coil L1 and the first capacitor C1 are connected in series, the first heating coil L1 is wound in a columnar shape and surrounds the outer side of the inner pot 22, the first heating coil L1 surrounds the bottom and the bottom of the inner pot 22, the first heating coil L1 and the first capacitor C1 generate a first alternating magnetic field which surrounds the inner pot 22 in a three-dimensional manner under the action of the alternating current, and the inner pot 22 generates eddy current under the action of the first alternating magnetic field and the second alternating magnetic field so as to obtain internal energy.
As shown in fig. 1 and 14, in this embodiment, the cooker body 2 further includes a cover 3 disposed on the rice cooker outer casing 21 to cover the inner pot 22, an energy receiving module 31 and a control panel 32 for inducing the first alternating magnetic field and converting and outputting a dc power are disposed on the cover 3, and the energy receiving module 31 outputs the dc power to the control panel 32.
In this embodiment, the cover 3 and the body 2 of the electric cooker are separable, which is convenient for cleaning and replacement, the energy receiving module 31 on the cover 3 induces the first alternating magnetic field to generate alternating current and convert the alternating current to output a direct current power supply, the direct current power supply supplies power to the control panel 32, and the control panel 32 includes a control interface for displaying the working state of the electric cooker, such as working temperature and working duration.
As shown in fig. 14, fig. 14 is a schematic view of functional modules of an electric rice cooker according to another embodiment of the present invention, further, a first wireless communication module 33 is further disposed on the lid 3, and a second wireless communication module 15 is further disposed on the base 1; the energy receiving module 31 further outputs the dc power to the first wireless communication module 33, and the control panel 32 is configured to receive a user instruction and output a control signal to control the energy transmitting module to operate through the first wireless communication module 33 and the second wireless communication module 15.
In this embodiment, the control panel 32 includes a control button and a display interface, the display interface is used for displaying the working status of the electric cooker, such as the working temperature and the working duration, the control button includes a working mode selection button, a working duration selection button, a timing button, etc., the first wireless communication module 33 obtains the power supply from the energy receiving module 31, the second wireless communication module 15 is connected with the energy emitting module and establishes communication with the first wireless communication module 33, when the inner pot 22 is placed in the pot body 3, the control panel 32 can output a control signal, and output to the energy emitting module through the first wireless communication module 33 arranged on the pot cover and the second wireless communication module 15 arranged on the base 1, and control the working status of the energy emitting module, such as the magnetic field intensity and the magnetic field frequency, so as to change the heating effect and the heating status of the inner pot 22, the second wireless communication module 15 is powered by an energy transmitting module, the energy transmitting module outputs a part of direct current to the second wireless communication module 15 after rectifying the commercial power, and the other part of current is subjected to inversion conversion.
The wireless communication module may adopt communication modes such as bluetooth, Zigbee, Wi-Fi, and the like, and a specific communication mode may be specifically selected, which is not specifically limited herein.
In an optional embodiment, the energy transmitting module includes a power interface 11 disposed on the base 1, and a power module 12, a driving module 14, and a transmitting module 13 disposed in the base 1, where the power module 12 receives mains power through the power interface 11 and converts an output alternating current to output to the transmitting module 13 under the control of the driving module 14, and the transmitting module 13 receives the alternating current and generates a surrounding second alternating magnetic field.
In this embodiment, the power interface 11 is disposed on the base 1, and is configured to receive a commercial power and output the commercial power to the power module 12, the power module 12 is configured to perform rectification and inversion conversion on the commercial power and output a high-frequency alternating current to the transmitting module 13, and the transmitting module 13 generates a corresponding high-frequency second alternating magnetic field according to the high-frequency alternating current.
As shown in fig. 15, fig. 15 is a schematic circuit structure diagram of another embodiment of the electric rice cooker of the present invention, wherein the power module 12 includes a first rectifying-filtering circuit 121 and an inverter circuit 122, a power input end of the first rectifying-filtering circuit 121 is connected to the power interface 11, a power output end of the first rectifying-filtering circuit 121 is connected to a power input end of the inverter circuit 122, a power output end of the inverter circuit 122 is connected to a power input end of the transmitting-end resonance module, and a controlled end of the inverter circuit 122 is connected to a control end of the driving module 14.
In this embodiment, the first rectifying and filtering circuit 121 may be composed of a rectifying bridge D1 and a first filtering capacitor LC1, the commercial power outputs a direct current through the first rectifying and filtering circuit 121, and the inverter circuit 122 inverts the direct current to generate an alternating current by changing the switching-off frequency and the duty ratio of the switch in the inverter circuit 122 in the driving module 14.
In this embodiment, the inverter circuit 122 may adopt a full-bridge inverter circuit 122 or a half-bridge inverter circuit 122, the driving module 14 may adopt a micro-control unit with a simple function or a control unit such as a single chip with a powerful function, and the driving module 14 receives the control signal output by the control panel 32 and correspondingly outputs a high-low level signal to the inverter circuit 122 to control the frequency and the intensity of the output current of the inverter circuit 122.
Further, the transmission module 13 includes a transmission coil FL and a transmission capacitor FC that receive the alternating current output from the power module 12 and induce a second alternating magnetic field.
In this embodiment, the transmitting coil FL receives the alternating current output by the power module 12 and oscillates to generate an alternating magnetic field, the transmitting coil FL and the transmitting capacitor FC constitute a resonant unit, the resonant unit and the resonant circuit 23 generate electromagnetic induction and generate a second alternating magnetic field and a first alternating magnetic field respectively, and the inner pot 22 obtains internal energy under the action of the first alternating magnetic field and the second alternating magnetic field.
In an optional embodiment, the energy receiving module 31 includes a receiving coil RL, a receiving capacitor RC, a second rectifying and filtering circuit 321, and a voltage stabilizing circuit 322, where the receiving coil RL and the receiving capacitor RC induce the first alternating magnetic field and output an alternating current, and the alternating current is converted by the second rectifying and filtering circuit 321 and the voltage stabilizing circuit 322 to output the dc power.
In this embodiment, the receiving coil RL inside the pot cover and the heating coil located at the pot opening generate electromagnetic induction, the receiving coil RL generates alternating current under the action of the first alternating magnetic field, the alternating current outputs direct current through the second rectifying and filtering circuit 321, and is output to the first wireless communication module 33 and the control panel 32 after being stabilized by the voltage stabilizing circuit 322, and wireless connection between the pot body 3 and the pot cover is realized through wireless power transmission between the pot cover and the pot body 3, so that the pot cover is convenient to clean and replace.
In this embodiment, base 1 carries out power transmission through the wireless power transmission mode with the inside resonant circuit 23 of the a kind of deep pot body 2, also carry out power transmission through the wireless power transmission mode between the a kind of deep pot body 2 and the pot cover 3, establish communication through wireless communication module between base 1 and the pot cover 3, energy transmission process conversion number of times is few between base 1 to pot cover 3, power conversion is efficient, and heating coil sets up along interior pot 22 annular, the shared space is less, electric rice cooker's volume only need set up according to interior pot 22's volume, electric rice cooker's volume designable less, other electromagnetic heating platforms can be applied to as ordinary pan to a kind of deep pot body 2 still simultaneously, for example the electromagnetism stove, can obtain the electric energy through the wireless power transmission mode equally.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An electric rice cooker, characterized in that, comprising:
the cooker body comprises a rice cooker shell and an inner pot accommodated in the rice cooker shell, the inner pot is provided with a first section close to the bottom of the inner pot and a second section close to the opening of the inner pot, and a first heating coil is arranged at a position corresponding to the first section;
a resonant circuit is arranged in the rice cooker shell and comprises a first heating coil, a second heating coil, a first capacitor and a second capacitor, the first heating coil surrounds the inner pot and extends spirally along the direction from the pot opening to the pot bottom of the inner pot, and the inner pot generates eddy current and heats according to a first alternating magnetic field output by the resonant circuit; the second heating coil surrounds the inner pot and corresponds to the position of the second section, and the first heating coil, the first capacitor and the second heating coil are sequentially connected in series, or the first heating coil, the first capacitor, the second heating coil and the second capacitor are sequentially connected in series.
2. The rice cooker of claim 1, wherein said inner pan further has a third section located between said first and second sections, said resonant circuit further comprising at least one third heating coil located in said third section, at least one of said third heating coils being connected to adjacent heating coils by at least one capacitor, respectively.
3. The rice cooker of claim 1, further comprising:
the base is provided with an energy transmitting module for generating a second alternating magnetic field;
the cooker body is positioned on the base, and the resonant circuit induces the second alternating magnetic field generated by the energy transmitting module to generate oscillation and output a first alternating magnetic field surrounding the inner pot.
4. The rice cooker of claim 3, wherein the cooker body further comprises a cover arranged on the cooker outer shell to cover the inner pot, an energy receiving module and a control panel for inducing the first alternating magnetic field and converting and outputting a direct current power supply are arranged on the cover, and the energy receiving module outputs the direct current power supply to the control panel.
5. The rice cooker as claimed in claim 4, wherein the cover is further provided with a first wireless communication module, and the base is further provided with a second wireless communication module; the energy receiving module also outputs the direct current power supply to the first wireless communication module, and the control panel is used for receiving a user instruction and outputting a control signal to control the energy transmitting module to work through the first wireless communication module and the second wireless communication module.
6. The rice cooker as claimed in claim 3, wherein the energy emitting module comprises a power interface disposed on the base, and a power module, a driving module and an emitting module disposed in the base, the power module receives commercial power via the power interface and converts and outputs alternating current to the emitting module under the control of the driving module, and the emitting module receives the alternating current and generates a second surrounding alternating magnetic field.
7. The electric cooker as claimed in claim 6, wherein the power module comprises a first rectifying and filtering circuit and an inverter circuit, the power input end of the first rectifying and filtering circuit is connected with the power interface, the power output end of the first rectifying and filtering circuit is connected with the power input end of the inverter circuit, the power output end of the inverter circuit is connected with the power input end of the transmitting end resonance module, and the controlled end of the inverter circuit is connected with the control end of the driving module.
8. The rice cooker of claim 7, wherein the transmitting module comprises a transmitting coil and a transmitting capacitor, the transmitting coil and the transmitting capacitor receiving the alternating current output by the power module and inducing a second alternating magnetic field.
9. The rice cooker as claimed in claim 4, wherein the energy receiving module comprises a receiving coil, a receiving capacitor, a second rectifying and filtering circuit and a voltage stabilizing circuit, the receiving coil and the receiving capacitor induce the first alternating magnetic field and output alternating current, and the alternating current is converted by the second rectifying and filtering circuit and the voltage stabilizing circuit to output the direct current power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811653594.0A CN111374528B (en) | 2018-12-29 | 2018-12-29 | Electric rice cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811653594.0A CN111374528B (en) | 2018-12-29 | 2018-12-29 | Electric rice cooker |
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| Publication Number | Publication Date |
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| CN111374528A CN111374528A (en) | 2020-07-07 |
| CN111374528B true CN111374528B (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811653594.0A Active CN111374528B (en) | 2018-12-29 | 2018-12-29 | Electric rice cooker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114390737A (en) * | 2021-12-17 | 2022-04-22 | 广东美的白色家电技术创新中心有限公司 | Power control circuit and power control method of electromagnetic heating device |
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| CN111374528A (en) | 2020-07-07 |
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