CN108736580B - Intelligent temperature control container based on wireless charging - Google Patents
Intelligent temperature control container based on wireless charging Download PDFInfo
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- CN108736580B CN108736580B CN201810671170.0A CN201810671170A CN108736580B CN 108736580 B CN108736580 B CN 108736580B CN 201810671170 A CN201810671170 A CN 201810671170A CN 108736580 B CN108736580 B CN 108736580B
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- 238000005485 electric heating Methods 0.000 claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 claims description 44
- 238000004891 communication Methods 0.000 claims description 38
- 238000004146 energy storage Methods 0.000 claims description 23
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- 238000004364 calculation method Methods 0.000 claims description 13
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- 230000001276 controlling effect Effects 0.000 claims description 9
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- 230000003321 amplification Effects 0.000 claims description 6
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000005672 electromagnetic field Effects 0.000 claims description 5
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
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- 230000006698 induction Effects 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 201000006347 Intellectual Disability Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0252—Domestic applications
- H05B1/0258—For cooking
- H05B1/0261—For cooking of food
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- Power Engineering (AREA)
- Food Science & Technology (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides an intelligent temperature control container based on wireless charging, which comprises: the charging seat is matched with the container body; the container body includes: the electric heating device comprises a shell, an inner container, an electric heating disc, a wireless power supply receiving circuit and an energy receiver; the external interface is not arranged outside the shell, the inner container is arranged in the shell, the energy receiver receives the transmitted electromagnetic energy and is sequentially and electrically connected with the wireless power supply receiving circuit for generating the electric energy required by the electric heating disc and the electric heating disc; the charging seat comprises a table board, an energy emitter and a wireless power supply emission host; the table top is not electrically connected with the shell; the energy transmitter and the energy receiver are suitable for energy transmission, and the wireless power supply transmitting host is electrically connected with the energy transmitter and arranged inside the table board. The temperature control container designed by the invention is not limited by the length of a power line any more, and has the advantages of high heating speed and good temperature control effect when being used integrally.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to an intelligent temperature control container based on wireless charging.
Background
With the continuous improvement of the technological level, the development of the wireless power transmission technology is leapfrog, the application range is continuously expanded, and various unsafe factors and defects of a wired power supply mode can be effectively avoided in the application of household appliances. The wireless power supply technology supplies power in a non-physical contact mode, and with the maturity of the technology, the wireless power supply technology is more and more concerned by people and accepted by society, and particularly, the wireless power supply table brings great convenience for people to use wireless power supply products.
For special populations (elderly, children and intellectual disabilities) a healthy and adequate diet is important for them, wherein the temperature of the food is an important evaluation parameter in consumption. Therefore, a portable intelligent container based on wireless charging technology is potentially in great demand. The health of special people is protected, and the significance is great.
The temperature control container has the characteristics of large volume, short power cord and hot gas generation in use, and can affect the use of surrounding electric appliances when being placed on a common socket in the condition of limited space; the hot water vapor generated by the container can cause electric shock once the connector is contacted with water; and the working modes of the temperature control of the container are different, and the connected heating resistor connected with the container can change, so that the energy transmission efficiency during wireless power supply is influenced.
In summary, when the container adopts the wireless power supply technology, how to improve the energy transmission efficiency when the container is wirelessly powered in different operating modes becomes a relatively concerned problem.
Disclosure of Invention
In view of the above problems, the present invention is directed to a container based on wireless power supply, which can ensure high energy transmission efficiency when the container is wirelessly powered in different temperature control modes.
The purpose of the invention is realized by adopting the following technical scheme:
the utility model provides an intelligence control by temperature change container based on wireless charging, includes: the charging seat is matched with the container body;
the container body includes: the electric heating device comprises a shell, an inner container, an electric heating disc, a wireless power supply receiving circuit and an energy receiver; the outer part of the shell is not provided with an external interface, the inner container is arranged in the shell, the electric heating disc is an adjustable resistance disc and is arranged in the shell and attached to the bottom of the outer side of the inner container, and the electric heating disc is used for heating the inner container after direct current is introduced and realizing temperature control; the energy receiver receives the transmitted electromagnetic energy and is electrically connected with the wireless power supply receiving circuit for generating the electric energy required by the electric heating disc and the electric heating disc in sequence; a magnetic isolation plate is arranged between the energy receiver and the wireless power supply receiving circuit and is used for isolating a high-frequency electromagnetic field near the energy receiver; the energy receiver is arranged in the shell and below the magnetism isolating plate; a heat insulation plate is arranged between the wireless power supply receiving circuit and the electric heating disc, and the wireless power supply receiving circuit is positioned below the heat insulation plate;
the charging seat can be embedded into a counter and comprises a table board, an energy emitter and a wireless power supply emission host; the table top is used for bearing the shell and the internal structure thereof and is not electrically connected with the shell; the energy transmitter and the energy receiver are suitable for energy transmission, and the wireless power supply transmitting host is electrically connected with the energy transmitter and arranged inside the table board.
Preferably, a radio frequency chip is arranged in the container shell, and a radio frequency reader matched with the radio frequency chip is arranged in the table top and used for identifying that the container body is placed on the table top and generating an enabling signal.
Preferably, the wireless power supply receiving circuit includes: the wireless communication device comprises a first switch, a rectifying circuit, a converting circuit, a main controller, a temperature controller, a second switch, a third switch, an energy storage battery and a first wireless communication module; the first switch is positioned between the energy receiver and the input end of the rectifying circuit and is used for controlling the transmission of energy to the container side; the second switch is arranged between the energy receiver and the energy storage battery, and the energy storage battery is connected with the main controller, the temperature controller and the first wireless communication module through a third switch; the third switch is not controlled by the main controller but is driven and controlled by the enabling signal, and when the container body is placed on the table top, the enabling signal is generated to trigger the third switch to be closed; the energy storage battery is preferably a super capacitor for storing energy, the energy storage battery supplies power to the main controller, the temperature controller and the first wireless communication module to trigger the main controller, and the main controller controls the first switch and the second switch to be switched on after working; the temperature controller acquires a working mode, sends a corresponding logic signal to the main controller, and generates a power supply request by the main controller and sends the power supply request to the first wireless communication module; the first wireless communication module then sends information to the wireless power supply transmission host.
Preferably, the wireless power supply transmitting host comprises a second wireless communication module, a transmitting controller, a PWM generator, a driving circuit, a rectifying and filtering circuit, and an inverting power amplifying circuit; the rectification filter circuit and the inversion power amplifying circuit are electrically connected with the energy transmitter in sequence; the second wireless communication module receives the information sent by the first wireless communication module and sends the information to the transmitting controller, and the transmitting controller further controls the PWM generator to work to generate a signal to trigger the driving circuit to work to generate a driving signal to drive the inverter power amplifying circuit to work; the rectification filter circuit is used for rectifying and filtering external commercial power to obtain direct current which is supplied to the inversion power amplification circuit, and the inversion power amplification circuit is driven to invert the direct current into high-frequency alternating current required by the energy emitter.
After the energy transmitter transmits electromagnetic field energy to the energy receiver, the energy receiver acquires the electromagnetic energy and converts the electromagnetic energy into alternating current, and the electric energy is supplied to the electric hot tray through the first switch, the rectifying circuit and the converting circuit in sequence; meanwhile, the main controller controls the rectification circuit and the conversion circuit; when the temperature control of the container is finished, the main controller controls the first switch to be switched off, so that the energy supply to the electric heating disk is cut off; simultaneously switching off the second switch to prevent the energy in the energy storage battery from flowing back in the energy receiver through the second switch; and the energy storage battery continues to supply power to the main controller and the first wireless communication module, and the main controller sends the power supply stopping information to the wireless power supply transmitting host through the first wireless communication module so that the wireless power supply transmitting host stops supplying power to the energy transmitter.
Preferably, the temperature controller is a human-computer interaction panel, is embedded in the shell of the container, and is used for receiving a temperature regulation and control mode set by a user and controlling the access resistance of the electric heating plate.
Preferably, the conversion circuit is set as a DC \ DC conversion circuit, is used for performing access heating resistance matching on the equivalent input impedance of the input end of the rectifier circuit correspondingly according to the switching of the access heating resistance of the electric heating disk, and comprises a first inductor, a controllable switch tube, a first capacitor and a second inductor; the input end of the first inductor is connected with the first output end of the rectifier, and the output end of the first inductor is connected with the collector electrode of the controllable switching tube; the output end of the first inductor is also connected with one end of the first capacitor; the other end of the first capacitor is connected with one end of the second inductor; and the other end of the emission stage of the controllable switching tube and the other end of the second inductor are both connected with the second output end of the rectifier.
Preferably, the main controller comprises an impedance detection module and a transformation adjustment module, wherein the impedance detection module is used for detecting an access heating resistor accessed by the electric hot tray; the conversion regulating module is used for regulating the switching duty ratio of a controllable switch of the conversion circuit and the working mode of the conversion circuit, so that the transmission efficiency between the electric energy transmitter and the electric energy receiver is controlled, and the conversion regulating module comprises: the duty ratio calculating unit is used for calculating a controllable switching tube in the conversion circuit, and the mode control unit is used for judging the operation mode of the conversion circuit.
Preferably, the energy transmitter is internally provided with a transmitting coil and a transmitting end capacitor connected in series with the inductance adaptation of the transmitting coil, and the energy receiver is internally provided with a receiving coil and a receiving end capacitor connected in series with the inductance adaptation of the receiving coil.
Preferably, the duty ratio of the controllable switching tube is calculated by the duty ratio calculating unit according to a calculation formula:
in the formula (d)sIs the duty ratio of the controllable switching tube; rLDetecting the obtained connected heating resistor connected to the electric heating disk; k is a calculated coupling factor between the energy transmitter and the energy receiver; w is the resonance frequency of an energy transmission system consisting of the transmitting coil and the receiving coil when the energy transmission system works in a resonance state; m is mutual inductance when the transmitting coil and the receiving coil carry out energy transmission work; rhIs the resistance of the transmitting coil; rgIs the resistance of the receiving coil.
The invention has the beneficial effects that: the wireless power supply mode is adopted, a power line is omitted from the temperature-adjusting container, the limitation of the length of the power line is avoided, and the use of surrounding electric appliances is not influenced; the radio frequency induction, the energy storage battery and the controlled switches are arranged, so that the container body can be placed on the table board, the third switch can be controlled to be closed through induction identification, the energy storage battery wakes up the main controller on the container body, and then the first wireless communication module is controlled to be connected with the second wireless communication module in the table board, the design is simple and efficient, and the self-starting of the container body is ensured; considering the change of the working mode of the container, the heating disk of the invention is connected with the adjustable change of the heating resistance, and in order to ensure that the higher wireless energy transmission efficiency is still kept when the external connection between the container body and the table board is connected with the heating resistance and is changed, a conversion circuit is designed and the conversion circuit is controlled, so that when the heating disk is connected with the heating resistance and is changed, the rectifying circuit, the conversion circuit and the equivalent input resistance of the heating disk equivalent to the input end of the rectifying circuit are kept unchanged; therefore, the container body and the table-board designed by the invention have the advantages of high mutual energy transmission efficiency, high heating speed in integral use and good effect.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an intelligent temperature-controlled container based on wireless charging in a preferred embodiment of the invention;
FIG. 2 is a connection diagram of the container body and the functional modules inside the countertop in a preferred embodiment of the present invention;
fig. 3 is a partial circuit diagram of the electrical power transfer process between the countertop and the container body in a preferred embodiment of the invention.
Reference numerals:
a housing 1; an inner container 2; an electric hot plate 3; a temperature controller 4; an energy receiver 5; a table top 6; an energy emitter 7; the wireless power supply transmitting host 8.
Detailed Description
The invention is further described in connection with the following application scenarios.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
Referring to fig. 1, in the present embodiment, an intelligent temperature control container based on wireless charging is provided, including: the charging seat is matched with the container body;
the container body includes: the electric heating device comprises a shell, an inner container, an electric heating disc, a wireless power supply receiving circuit and an energy receiver; the outer part of the shell is not provided with an external interface, the inner container is arranged in the shell, the electric heating disc is an adjustable resistance disc and is arranged in the shell and attached to the bottom of the outer side of the inner container, and the electric heating disc is used for heating the inner container after direct current is introduced; the energy receiver receives the transmitted electromagnetic energy and is electrically connected with the wireless power supply receiving circuit for generating the electric energy required by the electric heating disc and the electric heating disc in sequence; a magnetic isolation plate is arranged between the energy receiver and the wireless power supply receiving circuit and is used for isolating a high-frequency electromagnetic field near the energy receiver; the energy receiver is arranged in the shell and below the magnetism isolating plate; a heat insulation plate is arranged between the wireless power supply receiving circuit and the electric heating disc, and the wireless power supply receiving circuit is positioned below the heat insulation plate;
the charging seat can be embedded into a platform of the cabinet and comprises a table board, an energy emitter and a wireless power supply emission host; the table top is used for bearing the shell and the internal structure thereof and is not electrically connected with the shell; the energy transmitter and the energy receiver are suitable for energy transmission, and the wireless power supply transmitting host is electrically connected with the energy transmitter and arranged inside the table board.
In this embodiment, a radio frequency chip is disposed in the container housing, and a radio frequency reader adapted to the radio frequency chip is disposed in the table top, and is configured to identify that the container body is placed on the table top, and generate an enable signal.
In the embodiment, when the container body is placed on a table, the energy emitter and the energy receiver are not completely aligned and have deviation inevitably; for measuring the offset, a positioning transmitter is further disposed within the energy transmitter, the positioning transmitter including a first magnetic sensor chip array composed of a plurality of magnetic sensor chips and a first solenoid group composed of a plurality of solenoids generating a magnetic field, each magnetic sensor chip of the first magnetic sensor chip array and each solenoid of the first solenoid group being disposed around the transmitting coil; the energy receiver is also internally and correspondingly provided with a positioning receiver, and the positioning receiver comprises a photosensitive sensor chip array consisting of a plurality of photosensitive sensor chips, a second magnetic sensor chip array consisting of a plurality of magnetic sensor chips and a second solenoid group consisting of a plurality of solenoids for generating magnetic fields; each magnetic sensor chip of the first magnetic sensor chip array and each magnetic sensor chip of the second magnetic sensor chip array are set to only allow magnetic lines of force in the vertical direction to pass through; each photosensitive sensor chip of the photosensitive sensor chip array is set to only receive light rays in the vertical direction to pass through; with the above arrangement, the offset factor between the energy emitter and the energy receiver can be determined according to the sensitivity of the photosensitive sensor chip array.
Referring to fig. 2, in this embodiment, the wireless power supply receiving circuit includes: the wireless communication device comprises a first switch, a rectifying circuit, a converting circuit, a main controller, a temperature controller, a second switch, a third switch, an energy storage battery and a first wireless communication module; the first switch is positioned between the energy receiver and the input end of the rectifying circuit and is used for controlling the transmission of energy to the container side; the second switch is arranged between the energy receiver and the energy storage battery, and the energy storage battery is connected with the main controller, the temperature controller and the first wireless communication module through a third switch; the third switch is not controlled by the main controller but is driven and controlled by the enabling signal, and when the container body is placed on the table top, the enabling signal is generated to trigger the third switch to be closed; the energy storage battery is preferably a super capacitor for storing energy, the energy storage battery supplies power to the main controller, the temperature controller and the first wireless communication module to trigger the main controller, and the main controller controls the first switch and the second switch to be switched on after working; the temperature controller acquires a working mode of temperature adjustment, sends a corresponding logic signal to the main controller, and generates a power supply request by the main controller and sends the power supply request to the first wireless communication module; the first wireless communication module then sends information to the wireless power supply transmission host.
In this embodiment, the wireless power supply transmitting host includes a second wireless communication module, a transmitting controller, a PWM generator, a driving circuit, a rectifying and filtering circuit, and an inverting power amplifying circuit; the rectification filter circuit and the inversion power amplifying circuit are electrically connected with the energy transmitter in sequence; the second wireless communication module receives the information sent by the first wireless communication module and sends the information to the transmitting controller, and the transmitting controller further controls the PWM generator to work to generate a signal to trigger the driving circuit to work to generate a driving signal to drive the inverter power amplifying circuit to work; the rectification filter circuit is used for rectifying and filtering external commercial power to obtain direct current which is supplied to the inversion power amplification circuit, and the inversion power amplification circuit is driven to invert the direct current into high-frequency alternating current required by the energy emitter.
In this embodiment, after the energy emitter emits electromagnetic field energy to the energy receiver, the energy receiver obtains the electromagnetic energy and converts the electromagnetic energy into alternating current, and the electric energy is supplied to the electric hot tray through the first switch, the rectifier circuit and the conversion circuit in sequence; meanwhile, the main controller controls the rectification circuit and the conversion circuit; when the temperature adjusting process is finished, the main controller controls the first switch to be switched off, so that the energy supply to the electric heating disk is cut off; simultaneously switching off the second switch to prevent the energy in the energy storage battery from flowing back in the energy receiver through the second switch; and the energy storage battery continues to supply power to the main controller and the first wireless communication module, and the main controller sends the power supply stopping information to the wireless power supply transmitting host through the first wireless communication module so that the wireless power supply transmitting host stops supplying power to the energy transmitter.
In this embodiment, the temperature controller is a human-computer interaction panel, is embedded on the shell of the container, and is used for receiving a temperature regulation and control mode set by a user and controlling the access resistance of the electric hot tray.
Referring to fig. 3, in this embodiment, the conversion circuit is configured as a DC \ DC conversion circuit, and is configured to perform access heating resistance matching on the equivalent input impedance of the input end of the rectifying circuit according to the access heating resistance switching of the electric hot tray, and includes a first inductor, a controllable switch tube, a first capacitor, and a second inductor; the input end of the first inductor is connected with the first output end of the rectifier, and the output end of the first inductor is connected with the collector electrode of the controllable switching tube; the output end of the first inductor is also connected with one end of the first capacitor; the other end of the first capacitor is connected with one end of the second inductor; and the other end of the emission stage of the controllable switching tube and the other end of the second inductor are both connected with the second output end of the rectifier.
In this embodiment, the first wireless communication module and the second wireless communication module may perform wireless communication through bluetooth.
In this embodiment, when the access heating resistance of the electric hot tray changes, the energy transmission efficiency between the energy emitter and the energy receiver may decrease with the change of the access heating resistance, so to ensure that the energy transmission efficiency between the energy emitter and the energy receiver is always kept at a higher level, in this embodiment, a modeling analysis is first performed on the energy transmission circuit inside the container body and the table top to obtain a calculation formula of the system energy transmission efficiency, and the formula is solved to obtain a condition that the system energy transmission efficiency is higher: and ensuring that the equivalent resistance of the heating resistor connected to the rectifying circuit, the converting circuit and the electric heating disk equivalent to the input end of the rectifying circuit is basically maintained near the calculated optimal equivalent resistance value.
In this embodiment, to solve the problem of the energy transmission efficiency, the main controller includes an impedance detection module and a transformation adjustment module, where the impedance detection module is used to detect an access heating resistor accessed to the electric hot tray; the conversion regulating module is used for regulating the switching duty ratio of a controllable switch of the conversion circuit and the working mode of the conversion circuit, so that the transmission efficiency between the electric energy transmitter and the electric energy receiver is controlled, and the conversion regulating module comprises: the duty ratio calculating unit is used for calculating a controllable switching tube in the conversion circuit, and the mode control unit is used for judging the operation mode of the conversion circuit.
In this embodiment, the energy transmitter is internally provided with a transmitting coil and a transmitting end capacitor connected in series with the transmitting coil in an adaptive manner, and the energy receiver is internally provided with a receiving coil and a receiving end capacitor connected in series with the receiving coil in an adaptive manner.
In this embodiment, the impedance detection module is designed to detect the current flowing through the electric hot tray by designing an analog circuit with a fast response speed, and obtain the voltages at the two ends of the electric hot tray, according to a formula
Calculating the access heating resistance value accessed by the electric heating disk in real time; wherein, ILThe current flows through the electric heating plate; voutIs the voltage across the electric heating plate.
In this embodiment, the duty ratio of the controllable switching tube calculated by the duty ratio calculating unit is calculated according to the following formula:
in the formula (d)sIs the duty ratio of the controllable switching tube; rLDetecting the obtained connected heating resistor connected to the electric heating disk; k is a radical ofcalCalculating a coupling factor for the energy transmitter and the energy receiver; w is that the energy transmission system formed by the transmitting coil and the receiving coil works in a resonance stateThe resonant frequency at state; m is mutual inductance when the transmitting coil and the receiving coil carry out energy transmission work; rhIs the resistance of the transmitting coil; rgIs the resistance of the receiving coil.
In the preferred embodiment, a conversion circuit with a circuit topology structure is designed, a duty ratio calculation formula of a controllable switch tube in the conversion circuit is designed, the duty ratio is dynamically adjusted according to the change of the accessed heating resistor, the influence of the change of the accessed heating resistor on the transmission efficiency of a wireless energy transmission system of a container system can be reduced, the adjustment method is high in adjustment speed, and dynamic tracking compensation of the change of the accessed heating resistor in a small range is basically realized.
In this embodiment, in the prior art, the coupling factor between the energy emitter and the energy receiver is mostly determined by setting a large number of detection devices and circuits; in this embodiment, the calculated coupling factor is continuously calculated and updated according to the sampling time by obtaining the previously obtained offset factor and the intrinsic parameters and working parameters of the container body and the internal circuits of the table top, and the calculation formula is as follows:
in the formula, kcalFor said calculation of the coupling factor, RhIs the resistance of the transmitting coil; vnboThe effective value of the voltage output by the output end of the inverter power amplifying circuit in a resonance period is obtained; rgIs the resistance of the receive coil; voutThe effective value of the voltage at the two ends of the electric heating plate is obtained; p is an offset factor between the energy transmitter and the energy receiver which can be obtained through detection; l ishAn inductance value of the transmitting coil; l isgAn inductance value of the receiving coil; and w is the resonant frequency of the energy transmission system consisting of the transmitting coil and the receiving coil when the energy transmission system works in a resonant state.
In the preferred embodiment, the calculation formula for calculating the coupling factor is designed, and the calculation formula is adjusted along with the change of the working state of the wireless power supply container, so that the calculation formula has stronger timeliness and applicability, can reflect the coupling degree between the energy transmitter and the energy receiver more accurately, and does not need to add an additional detection circuit, so that the complexity of the system is reduced.
In this embodiment, the mode control unit is configured to determine whether the DC/DC conversion circuit should operate in a continuous inductor current working state (CCM) or in a discontinuous inductor current working state (DCM), and perform mode adjustment on the DC/DC conversion circuit according to a determination result to enable the DC/DC conversion circuit to operate in a corresponding working state.
In this embodiment, the formula for determining the operation mode of the DC \ DC conversion circuit is as follows:
in the formula, JudgDetermining a function for the operating mode; l is1A first inductor inside the DC/DC converter; l is2A second inductor inside the DC/DC converter; t is the switching period of a switching tube in the DC/DC converter; dsThe duty ratio of a switching tube in the DC/DC converter is obtained; rLAnd connecting a measuring resistance value of the heating resistor into the electric heating disk.
If function value JudgAnd if the current value is more than or equal to 0, controlling the DC \ DC converter to work in a CCM (continuous current mode) operation mode, otherwise, controlling the DC \ DC converter to work in a DCM operation mode.
And finally, adjusting and controlling the DC/DC converter according to the duty ratio value obtained by the calculation and the determined operation mode.
In the preferred embodiment, considering that the adjustment compensation for the change of the access heating resistance is limited only by adjusting the duty ratio of the controllable switching tube in the conversion circuit, in order to ensure that the equivalent resistance of the access heating resistance of the rectification circuit, the conversion circuit and the electric heating disk is equivalent to the equivalent resistance of the input end of the rectification circuit is basically maintained near the optimal equivalent resistance value, the operation mode of the conversion circuit is further adjusted while the duty ratio of the controllable switching tube is adjusted, so that the adjustment range is wide enough to meet the change of the access heating resistance of the electric heating disk, and the adjustment is performed accordingly, so that the adjustment effect is good.
In the preferred embodiment of the invention, the designed container adopts a wireless power supply mode, so that a power line is omitted, the limitation of the length of the power line is avoided, and the use of the surrounding container or device is not influenced; the radio frequency induction, the energy storage battery and the controlled switches are arranged, so that the container body can be placed on the table board, the third switch can be controlled to be closed through induction identification, the energy storage battery wakes up the main controller on the container body, and then the first wireless communication module is controlled to be connected with the second wireless communication module in the table board, the design is simple and efficient, and the self-starting of the container body is ensured; considering the change of the working mode of the container, the heating disk of the invention is connected with the adjustable change of the heating resistance, and in order to ensure that the higher wireless energy transmission efficiency is still kept when the external connection between the container body and the table board is connected with the heating resistance and is changed, a conversion circuit is designed and the conversion circuit is controlled, so that when the heating disk is connected with the heating resistance and is changed, the rectifying circuit, the conversion circuit and the equivalent input resistance of the heating disk equivalent to the input end of the rectifying circuit are kept unchanged; therefore, the container body and the table-board designed by the invention have the advantages of high mutual energy transmission efficiency, high heating speed in integral use and good effect.
It is to be noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions; the specific distinction can be realized by the attached drawings.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be analyzed by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The utility model provides an intelligence control by temperature change container based on wireless charging which characterized in that includes: the charging seat is matched with the container body;
the container body includes: the electric heating device comprises a shell, an inner container, an electric heating disc, a wireless power supply receiving circuit and an energy receiver; the outer part of the shell is not provided with an external interface, the inner container is arranged in the shell, the electric heating disc is an adjustable resistance disc and is arranged in the shell and attached to the bottom of the outer side of the inner container, and the electric heating disc is used for heating the inner container after direct current is introduced and realizing temperature control; the energy receiver receives the transmitted electromagnetic energy and is electrically connected with a wireless power supply receiving circuit used for generating the electric energy required by the electric heating disc and the electric heating disc in sequence; a magnetic isolation plate is arranged between the energy receiver and the wireless power supply receiving circuit and is used for isolating a high-frequency electromagnetic field near the energy receiver; the energy receiver is arranged in the shell and below the magnetism isolating plate; a heat insulation plate is arranged between the wireless power supply receiving circuit and the electric heating disc, and the wireless power supply receiving circuit is positioned below the heat insulation plate;
the charging seat comprises a table board, an energy emitter and a wireless power supply emission host; the table top is used for bearing the shell and the internal structure thereof and is not electrically connected with the shell; the energy transmitter and the energy receiver are suitable for energy transmission, and the wireless power supply transmitting host is electrically connected with the energy transmitter and arranged in the table board;
a positioning transmitter is further disposed within the energy transmitter, the positioning transmitter including a first magnetic sensor chip array composed of a plurality of magnetic sensor chips and a first solenoid group composed of a plurality of solenoids that generate a magnetic field, each magnetic sensor chip of the first magnetic sensor chip array and each solenoid of the first solenoid group being disposed around the transmitting coil; the energy receiver is also internally and correspondingly provided with a positioning receiver, and the positioning receiver comprises a photosensitive sensor chip array consisting of a plurality of photosensitive sensor chips, a second magnetic sensor chip array consisting of a plurality of magnetic sensor chips and a second solenoid group consisting of a plurality of solenoids for generating magnetic fields; each magnetic sensor chip of the first magnetic sensor chip array and each magnetic sensor chip of the second magnetic sensor chip array are set to only allow magnetic lines of force in the vertical direction to pass through; each photosensitive sensor chip of the photosensitive sensor chip array is set to only receive light rays in the vertical direction to pass through; by the arrangement, the offset factor between the energy emitter and the energy receiver can be determined according to the sensitivity of the photosensitive sensor chip array;
the energy receiver is internally provided with a receiving coil and a receiving end capacitor which is in adaptive series connection with the inductance of the receiving coil;
when calculating the coupling factor between the energy emitter and the energy receiver, the coupling factor is continuously calculated and updated according to the sampling time through the offset factor and the acquisition of inherent parameters and working parameters of the container body and the internal circuits of the table top, and the calculation formula is as follows:
in the formula, kcalFor said calculation of the coupling factor, RhIs the resistance of the transmitting coil; vnboThe effective value of the voltage output by the output end of the inverter power amplifying circuit in a resonance period is obtained; rgIs the resistance of the receive coil; voutThe effective value of the voltage at the two ends of the electric heating plate is obtained; p is an offset factor between the energy transmitter and the energy receiver which can be obtained through detection; l ishAn inductance value of the transmitting coil; l isgAn inductance value of the receiving coil; and w is the resonant frequency of the energy transmission system consisting of the transmitting coil and the receiving coil when the energy transmission system works in a resonant state.
2. The intelligent temperature-controlled container based on wireless charging as claimed in claim 1, wherein a radio frequency chip is arranged in the housing, and a radio frequency reader adapted to the radio frequency chip is arranged in the table top for identifying that the container body is placed on the table top and generating an enabling signal.
3. The intelligent temperature-controlled container based on wireless charging as claimed in claim 1, wherein the wireless power supply receiving circuit comprises: the wireless communication device comprises a first switch, a rectifying circuit, a converting circuit, a main controller, a temperature controller, a second switch, a third switch, an energy storage battery and a first wireless communication module; the first switch is positioned between the energy receiver and the input end of the rectifying circuit and is used for controlling the transmission of energy to the container side; the second switch is arranged between the energy receiver and the energy storage battery, and the energy storage battery is connected with the main controller, the temperature controller and the first wireless communication module through a third switch; the third switch is not controlled by the main controller but is driven and controlled by an enabling signal, and when the container body is placed on the table top, the enabling signal is generated to trigger the third switch to be closed; the energy storage battery is used for storing energy for the super capacitor, the energy storage battery is used for supplying power to the main controller, the temperature controller and the first wireless communication module to trigger the main controller, and the main controller controls the first switch and the second switch to be switched on after working; the temperature controller acquires a working mode, sends a corresponding logic signal to the main controller, and generates a power supply request by the main controller and sends the power supply request to the first wireless communication module; the first wireless communication module then sends information to the wireless power supply transmission host.
4. The intelligent temperature control container based on wireless charging of claim 3, wherein the wireless power supply transmitting host comprises a second wireless communication module, a transmitting controller, a PWM generator, a driving circuit, a rectifying and filtering circuit and an inverting power amplifying circuit; the rectification filter circuit and the inversion power amplifying circuit are electrically connected with the energy transmitter in sequence; the second wireless communication module receives the information sent by the first wireless communication module and sends the information to the transmitting controller, and the transmitting controller further controls the PWM generator to work to generate a signal to trigger the driving circuit to work to generate a driving signal to drive the inverter power amplifying circuit to work; the rectification filter circuit is used for rectifying and filtering external commercial power to obtain direct current which is supplied to the inversion power amplification circuit, and the inversion power amplification circuit is driven to invert the direct current into high-frequency alternating current required by the energy emitter.
5. The intelligent temperature-controlled container based on wireless charging as claimed in claim 3, wherein the temperature controller is a human-computer interaction panel embedded in the container shell for receiving the temperature regulation mode set by the user and controlling the heating resistor connected to the electric heating plate accordingly.
6. The intelligent temperature control container based on wireless charging as claimed in claim 3, wherein the conversion circuit is set as a DC/DC conversion circuit for performing impedance matching on the equivalent input impedance of the input end of the rectifying circuit according to the connected heating resistance of the electric heating disk, and comprises a first inductor, a controllable switch tube, a first capacitor and a second inductor; the input end of the first inductor is connected with the first output end of the rectifier, and the output end of the first inductor is connected with the collector electrode of the controllable switching tube; the output end of the first inductor is also connected with one end of the first capacitor; the other end of the first capacitor is connected with one end of the second inductor; the other end of the second inductor is connected with the second output end of the rectifier, the main controller comprises a conversion adjusting module, and the base of the controllable switch tube is connected with the conversion adjusting module.
7. The intelligent temperature control container based on wireless charging as claimed in claim 3, wherein the main controller comprises an impedance detection module and a transformation adjustment module, the impedance detection module is used for detecting and acquiring an access heating resistance of the electric heating plate; the conversion regulating module is used for regulating the switching duty ratio of a controllable switching tube of the conversion circuit and the working mode of the conversion circuit, so that the transmission efficiency between the energy transmitter and the energy receiver is controlled, and the conversion regulating module comprises: the duty ratio calculating unit is used for calculating a controllable switching tube in the conversion circuit, and the mode control unit is used for judging the operation mode of the conversion circuit.
8. The intelligent temperature-controlled container based on wireless charging as claimed in claim 7, wherein the duty ratio calculation formula of the duty ratio calculation unit for calculating the duty ratio of the controllable switching tube is as follows:
in the formula (d)sIs the duty ratio of the controllable switching tube; rLDetecting the obtained access heating resistance of the electric heating disc; k is a radical ofcalCalculating a coupling factor for the energy transmitter and the energy receiver; w is the resonance frequency of an energy transmission system consisting of the transmitting coil and the receiving coil when the energy transmission system works in a resonance state; m is mutual inductance when the transmitting coil and the receiving coil carry out energy transmission work; rhIs the resistance of the transmitting coil; rgIs the resistance of the receiving coil.
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| TWI717752B (en) * | 2019-06-10 | 2021-02-01 | 大陸商海速芯（無錫）科技有限公司 | Health pot heating device with wireless power supply |
| CN112056941A (en) * | 2019-06-10 | 2020-12-11 | 十速兴业科技（深圳）有限公司 | Wireless power supply health preserving kettle heating device |
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| CN106225936A (en) * | 2016-08-27 | 2016-12-14 | 杭州浙港智能科技有限公司 | A kind of temperature monitoring system and temperature monitoring thereof |
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