CN105674571B - Wireless power electric heater and its power control device and method - Google Patents
Wireless power electric heater and its power control device and method Download PDFInfo
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- CN105674571B CN105674571B CN201610012483.6A CN201610012483A CN105674571B CN 105674571 B CN105674571 B CN 105674571B CN 201610012483 A CN201610012483 A CN 201610012483A CN 105674571 B CN105674571 B CN 105674571B
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- electric heater
- wireless power
- input current
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
Abstract
The present invention discloses a kind of wireless power electric heater and its power control device and method.Wherein, which includes：Temperature detecting module, for when wireless power electric heater starts, detecting the water temperature in wireless power electric heater；First control module, for when water temperature is close to preset temperature value, control energy acceptance end to enter detuning state；Measure voltage ＆amp, for when energy acceptance end enters detuning state, detect the amplitude of the input current at energy transmitting end, if the difference of the amplitude of input current and default amplitude is more than the first predetermined threshold value, the input voltage zero crossing and input current zero crossing at energy transmitting end are further detected；Second control module, the phase difference for calculating input current and input voltage according to input voltage zero crossing and input current zero crossing, and when phase difference is more than the second predetermined threshold value, reduce the input power at energy transmitting end.The device of the invention can realize the thermostatic control of wireless power electric heater.
Description
Technical field
The present invention relates to household electrical appliance technical field, more particularly to a kind of wireless power electric heater and its power control dress
It sets and method.
Background technology
The universal comfort and convenience for substantially increasing people's daily life of electric heater.Currently, to improve electric heating
The Electrical Safety of hydrophone proposes the scheme of wireless power in the related technology, i.e. electric heater has supply side and power side, supplies
The cities electricity Ce Yu are electrically connected, and power side is connected with the ontology for storing and heating water, and power side wirelessly obtains supply side
Energy, after converting energy to electric energy can be ontology in water heating.
Passive heat preservation and preservation and controlling two ways are generally used to the heat preservation of water in electric heater.Passive heat preservation uses
The methods of insulating layer is added in water storage liner to realize, this method undoubtedly has soaking time shorter scarce with heat insulation effect difference etc.
Point.Preservation and controlling refers to carrying out relevant control to mains side according to real-time water temperature to maintain the constant of water temperature.However it is wirelessly supplying
In electric electric heater, the parameters such as power of power side each depend on supply side, therefore the controllability of power side is poor, it is contemplated that real
The accuracy of existing difficulty and control is not easy to realize thermostatic control in power side.And since ontology is not direct with supply side
Electrical connection, the signal of water temperature is difficult to be transmitted to supply side, therefore is also difficult to realize constant temperature in supply side according to real-time water temperature
Control.
In view of the above-mentioned problems, up for proposing a kind of to realize simple and high accuracy constant temperature for wireless power electric heater
Control mode.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
Purpose is to propose a kind of power control device of wireless power electric heater, can realize the constant temperature of wireless power electric heater
Control, and it realizes that simply thermostatically controlled accuracy is higher.
Second object of the present invention is to propose a kind of wireless power electric heater.
Third object of the present invention is to propose a kind of Poewr control method of wireless power electric heater.
The power control device of the wireless power electric heater of embodiment according to a first aspect of the present invention, the wireless power
Electric heater includes energy transmitting end and energy acceptance end, when the wireless power electric heater starts, the energy transmitting
End and energy acceptance end are in resonant condition, and described device includes：Temperature detecting module, the temperature detecting module are used for
When the wireless power electric heater starts, the water temperature in the wireless power electric heater is detected；First control module, it is described
First control module is used for when the water temperature is close to preset temperature value, is controlled the energy acceptance end and is entered detuning state；Electricity
Current voltage detection module, the measure voltage ＆amp are used to, when the energy acceptance end enters detuning state, detect institute
The amplitude of the input current at energy transmitting end is stated, if the difference of the amplitude and default amplitude of the input current at the energy transmitting end
Value is more than the first predetermined threshold value, then further detects the input voltage zero crossing and input current zero passage at the energy transmitting end
Point；Second control module, second control module are used for according to the input voltage zero crossing and the input current zero passage
Point calculates the phase difference of the input current and input voltage at the energy transmitting end, and is more than the second default threshold in the phase difference
When value, the input power at the energy transmitting end is reduced.
The entrance of energy acceptance end is utilized in the power control device of wireless power electric heater according to the ... of the embodiment of the present invention
When detuning state, the principle of significant changes will occur for the input current and input voltage at energy transmitting end, in wireless power electric heating
When water temperature in hydrophone is close to preset temperature value, controllable energy receiving terminal enters detuning state, can detect energy as a result,
When measuring the input current and input voltage generation significant changes of transmitting terminal, the input power at energy transmitting end is reduced, consequently facilitating
Within the scope of the water temperature in wireless power electric heater is effectively maintained close to preset temperature value, wireless power is realized
The thermostatic control of electric heater, and it realizes that simply cost is relatively low, while thermostatically controlled accuracy is higher.
In addition, the power control device of wireless power electric heater according to the above embodiment of the present invention can also have such as
Under additional technical characteristic：
According to one embodiment of present invention, the energy transmitting end includes transmitting coil, and the transmitting coil is according to institute
The input current for stating energy transmitting end generates magnetic field, and the energy acceptance end includes receiving coil, compensation network and AC/DC transformation
Device, the receiving coil generate induced electromotive force according to the magnetic field, and the compensation network is for producing the induced electromotive force
After the voltage and current of raw alternating current is adjusted to same-phase, the AC/DC converters are inputted.
Further, first control module includes：Resonant capacitance；Control switch, the resonant capacitance and the control
System switch series connection forms controlling brancher, by the both ends of the controlling brancher respectively with two output end phases of the compensation network
Even, when the control is switched and is closed, the controlling brancher conducting, when the control is switched and disconnected, the controlling brancher is disconnected
It opens；Driving unit, the driving unit are used to drive disconnection and the closure of the control switch；Control unit, the control are single
Member drives the control switch to be closed for when the water temperature is close to preset temperature value, controlling the driving unit, with conducting
The controlling brancher, it is in parallel with the compensation network to control the resonant capacitance, entered with controlling the energy acceptance end
Detuning state.
According to one embodiment of present invention, second control module is calculated by the following formula the energy transmitting end
Input current and input voltage phase difference：
Wherein, ω is the phase difference, tiFor the input current zero crossing, tvFor the input voltage zero crossing, T is
The period of the input current, π are constant, and % is complementation operator.
Optionally, described control unit is additionally operable to：When the control energy acceptance end reaches default into detuning state
Between after, control the driving unit and drive the control switch disconnection, to disconnect the resonant capacitance and the compensation network
Between connection, the energy acceptance end is switched into normal resonant condition.
The wireless power electric heater of embodiment according to a second aspect of the present invention, including implement according to a first aspect of the present invention
The power control device of the wireless power electric heater of example.
Wireless power electric heater according to the ... of the embodiment of the present invention, when energy acceptance end is utilized into detuning state, energy
The principle of significant changes will occur for the input current and input voltage of amount transmitting terminal, when water temperature is close to preset temperature value, controllably
Energy acceptance end processed enters detuning state, can occur as a result, in the input current and input voltage for detecting energy transmitting end
When significant changes, the input power at energy transmitting end is reduced, consequently facilitating water temperature is effectively maintained close to preset temperature value
Within the scope of, thermostatic control is realized, and it realizes that simply cost is relatively low, while thermostatically controlled accuracy is higher.
The Poewr control method of the wireless power electric heater of embodiment according to a third aspect of the present invention, the wireless power
Electric heater includes energy transmitting end and energy acceptance end, when the wireless power electric heater starts, the energy transmitting
End and the energy acceptance end are in resonant condition, the described method comprises the following steps：When the wireless power electric heater
When startup, the water temperature in the wireless power electric heater is detected；If described in the water temperature close to preset temperature value, controls
Energy acceptance end enters detuning state；When the energy acceptance end enters detuning state, the defeated of the energy transmitting end is detected
Enter the amplitude of electric current；If the amplitude of the input current at the energy transmitting end and the difference of default amplitude are more than the first default threshold
Value, then further detect the input voltage zero crossing and input current zero crossing at the energy transmitting end；According to input electricity
Press through zero and the input current zero crossing calculate the energy transmitting end input current and input voltage phase difference；Such as
Phase difference described in fruit is more than the second predetermined threshold value, then reduces the input power at the energy transmitting end.
The entrance of energy acceptance end is utilized in the Poewr control method of wireless power electric heater according to the ... of the embodiment of the present invention
When detuning state, the principle of significant changes will occur for the input current and input voltage at energy transmitting end, in wireless power electric heating
When water temperature in hydrophone is close to preset temperature value, controllable energy receiving terminal enters detuning state, can detect energy as a result,
When measuring the input current and input voltage generation significant changes of transmitting terminal, the input power at energy transmitting end is reduced, consequently facilitating
Within the scope of the water temperature in wireless power electric heater is effectively maintained close to preset temperature value, wireless power is realized
The thermostatic control of electric heater, and it realizes that simply cost is relatively low, while thermostatically controlled accuracy is higher.
In addition, the Poewr control method of wireless power electric heater according to the above embodiment of the present invention can also have such as
Under additional technical characteristic：
According to one embodiment of present invention, the energy transmitting end includes transmitting coil, and the transmitting coil is according to institute
The input current for stating energy transmitting end generates magnetic field, and the energy acceptance end includes receiving coil, compensation network and AC/DC transformation
Device, the receiving coil generate induced electromotive force according to the magnetic field, and the compensation network is for producing the induced electromotive force
After the voltage and current of raw alternating current is adjusted to same-phase, the AC/DC converters are inputted.
Further, in parallel with the compensation network by controlling resonant capacitance, entered with controlling the energy acceptance end
Detuning state.
According to one embodiment of present invention, input current and the input at the energy transmitting end are calculated by the following formula
The phase difference of voltage：
Wherein, ω is the phase difference, tiFor the input current zero crossing, tvFor the input voltage zero crossing, T is
The period of the input current, π are constant, and % is complementation operator.
Optionally, the method further includes：After controlling the energy acceptance end and reaching preset time into detuning state,
Disconnect the resonant capacitance
Description of the drawings
Fig. 1 is the structure diagram according to the power control device of the wireless power electric heater of one embodiment of the invention；
Fig. 2 is the structural schematic diagram according to the wireless power electric heater of one embodiment of the invention；
Fig. 3 is the input current at energy transmitting end when energy acceptance end is in resonant condition according to the embodiment of the present invention
With the schematic diagram of input voltage；
Fig. 4 is the input current at energy transmitting end when energy acceptance end enters detuning state according to the embodiment of the present invention
With the schematic diagram of input voltage；
Fig. 5 is the structural schematic diagram according to the wireless power electric heater of another embodiment of the present invention；
Fig. 6 is the flow chart according to the Poewr control method of the wireless power electric heater of one embodiment of the invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The wireless power electric heater and its power control device and method of the embodiment of the present invention are described below in conjunction with the accompanying drawings.
Fig. 1 is the structure diagram according to the power control device of the wireless power electric heater of one embodiment of the invention.
It should be noted that in an embodiment of the present invention, wireless power electric heater includes energy transmitting end and energy
Receiving terminal, when wireless power electric heater starts, energy transmitting end and energy acceptance end are in resonant condition.Fig. 2 is root
According to the structural schematic diagram of the wireless power electric heater of one embodiment of the invention.As shown in Fig. 2, energy transmitting end may include sending out
Ray circle, transmitting coil generate magnetic field according to the input current at energy transmitting end.Energy acceptance end may include receiving coil, compensation
Network and AC/DC converters, receiving coil can generate induced electromotive force according to magnetic field, to improve the active power at energy acceptance end
And energy conversion efficiency, the voltage and current for the alternating current that induced electromotive force generates can be adjusted to same-phase by compensation network
Afterwards, AC/DC converters are inputted.
As shown in Figure 1, the power control device of the wireless power electric heater of the embodiment of the present invention, including：Temperature detection
Module 10, the first control module 20, measure voltage ＆amp 30 and the second control module 40.
Wherein, temperature detecting module 10 can be used for when wireless power electric heater starts, and detect wireless power electric hot water
Water temperature in device.In one embodiment of the invention, temperature detecting module 10 can be built in the interior of wireless power electric heater
In courage.
First control module 20 is used for when water temperature is close to preset temperature value, and control energy acceptance end enters detuning state.
In one embodiment of the invention, as shown in Fig. 2, the first control module 20 may include：Resonant capacitance C, control
Switch Q, driving unit D and control unit U.Wherein, resonant capacitance C can connect to form controlling brancher with control switch Q, will control
The both ends of branch are connected with two output ends of compensation network respectively, and when controlling switch Q closures, controlling brancher conducting is being controlled
When making switch Q disconnections, controlling brancher disconnects.Driving unit D can be used for disconnection and the closure of drive control switch Q.Control unit U
It is closed for when water temperature is close to preset temperature value, controlling driving unit D drive control switches Q, controlling brancher is connected, so as to
It is in parallel with compensation network to control resonant capacitance C, enters detuning state to control energy acceptance end.
It should be appreciated that control energy acceptance end enters detuning state only for convenience of subsequent voltage current detection module 30 to energy
The detection for measuring transmitting terminal input current and input voltage, to maintain the normal operation of wireless power electric heater, control unit U to exist
After control energy acceptance end reaches preset time into detuning state, driving unit D drive control switches Q can control to disconnect, with
Just the connection between resonant capacitance C and compensation network is disconnected, energy receiving terminal is switched into normal resonant condition.Wherein, in advance
If the time can be smaller numerical value, energy receiving terminal can be made briefly to enter detuning state, ensure subsequent detection.
Measure voltage ＆amp 30 is used for when energy acceptance end enters detuning state, the input at detection energy transmitting end
The amplitude of electric current, if the amplitude of the input current at energy transmitting end and the difference of default amplitude are more than the first predetermined threshold value,
The further input voltage zero crossing and input current zero crossing at detection energy transmitting end.
Second control module 40 is used to calculate energy transmitting according to input voltage zero crossing and the input current zero crossing
The input current at end and the phase difference of input voltage, and when phase difference is more than the second predetermined threshold value, reduce energy transmitting end
Input power.
Fig. 3 is the input current at energy transmitting end when energy acceptance end is in resonant condition according to the embodiment of the present invention
With the schematic diagram of input voltage, Fig. 4 be according to the embodiment of the present invention energy acceptance end enter detuning state when energy transmitting
The input current at end and the schematic diagram of input voltage.In figs. 3 and 4, Time is the time, can indicate the variation of phase, Vp
For input voltage, ipFor input current.As shown in Figure 3 and Figure 4, if energy acceptance end enters detuning state, energy transmitting
Input current, input voltage and the input current at end and the phase difference of input voltage will change.Therefore, in the present invention
Embodiment in, can by the detection of input current and input voltage to energy transmitting end come judge energy acceptance end whether into
Enter detuning state, to further determine the water temperature in wireless power electric heater whether close to preset temperature value.
If the difference of the amplitude that should be appreciated that the input current at energy transmitting end and default amplitude is more than the first default threshold
Value, then the amplitude of the input current at energy transmitting end changes greatly.In one embodiment of the invention, the second control module 40
The input current at energy transmitting end and the phase difference of input voltage can be calculated by the following formula：
Wherein, ω is phase difference, tiFor input current zero crossing, tvFor input voltage zero crossing, T is the week of input current
Phase, π are constant, and % is complementation operator.
If phase difference is more than the second predetermined threshold value, it can determine that energy acceptance end enters detuning state, so as into one
Step judges the water temperature in wireless power electric heater close to preset temperature value.At this point, the input power at energy transmitting end can be reduced,
So that the water temperature in wireless power electric heater is no longer significantly raised and lowered, and be maintained close to preset temperature value range it
It is interior.
In one embodiment of the invention, as shown in figure 5, energy transmitting end may particularly include：Another AC/DC transformation
Device, filter, DC/DC converters, inverter and transmitting coil.To improve the active power and electric energy conversion effect at energy transmitting end
Rate, energy transmitting end may also include another compensation network.Wherein, another AC/DC converters are connected with AC power, can be used for by
AC power is converted to DC power supply.In an embodiment of the present invention, AC power can be the alternating current of 220V, and the frequency of alternating current can
For 50Hz.Filter can be used for removing the clutter in DC power supply.DC/DC converters can be used for changing the voltage of DC power supply.
Inverter can be used for DC power supply being converted to high-frequency ac power, and input high-frequency ac power to transmitting coil.In this hair
In bright embodiment, it is based on above structure, the second control module 40 can be controlled by controlling the output voltage of DC/DC converters
The input power at energy transmitting end.
The entrance of energy acceptance end is utilized in the power control device of wireless power electric heater according to the ... of the embodiment of the present invention
When detuning state, the principle of significant changes will occur for the input current and input voltage at energy transmitting end, in wireless power electric heating
When water temperature in hydrophone is close to preset temperature value, controllable energy receiving terminal enters detuning state, can detect energy as a result,
When measuring the input current and input voltage generation significant changes of transmitting terminal, the input power at energy transmitting end is reduced, consequently facilitating
Within the scope of the water temperature in wireless power electric heater is effectively maintained close to preset temperature value, wireless power is realized
The thermostatic control of electric heater, and it realizes that simply cost is relatively low, while thermostatically controlled accuracy is higher.
Corresponding above-described embodiment, the present invention also propose a kind of wireless power electric heater.
The wireless power electric heater of the embodiment of the present invention, including wireless power electric heating according to the above embodiment of the present invention
The power control device of hydrophone, specific embodiment can refer to above-described embodiment, and to avoid redundancy, details are not described herein.
Wireless power electric heater according to the ... of the embodiment of the present invention, when energy acceptance end is utilized into detuning state, energy
The principle of significant changes will occur for the input current and input voltage of amount transmitting terminal, when water temperature is close to preset temperature value, controllably
Energy acceptance end processed enters detuning state, can occur as a result, in the input current and input voltage for detecting energy transmitting end
When significant changes, the input power at energy transmitting end is reduced, consequently facilitating water temperature is effectively maintained close to preset temperature value
Within the scope of, thermostatic control is realized, and it realizes that simply cost is relatively low, while thermostatically controlled accuracy is higher.
Corresponding above-described embodiment, the present invention also propose a kind of Poewr control method of wireless power electric heater.
Fig. 6 is the flow chart according to the Poewr control method of the wireless power electric heater of one embodiment of the invention.
It should be noted that in an embodiment of the present invention, wireless power electric heater includes energy transmitting end and energy
Receiving terminal, when wireless power electric heater starts, energy transmitting end and energy acceptance end are in resonant condition.Such as Fig. 2 institutes
Show, energy transmitting end may include that transmitting coil, transmitting coil generate magnetic field according to the input current at energy transmitting end.Energy acceptance
End may include receiving coil, compensation network and AC/DC converters, and receiving coil can generate induced electromotive force according to magnetic field, to carry
The active power and energy conversion efficiency of high-energy receiving terminal can pass through the alternating current that compensation network generates induced electromotive force
After voltage and current is adjusted to same-phase, AC/DC converters are inputted.
As shown in fig. 6, the Poewr control method of the wireless power electric heater of the embodiment of the present invention, includes the following steps：
S601 detects the water temperature in wireless power electric heater when wireless power electric heater starts.
It in one embodiment of the invention, can be by the temperature sensor that is built in wireless power inner container of electric water heater
Detect water temperature.
S602, if water temperature controls energy acceptance end and enter detuning state close to preset temperature value.
In one embodiment of the invention, can be in parallel with compensation network by controlling resonant capacitance, it is connect with controlling energy
Receiving end enters detuning state.As shown in Fig. 2, resonant capacitance C, control switch Q, driving unit D and control unit U and energy can be made
Receiving terminal is connected, and specifically, resonant capacitance C can connect to form controlling brancher with control switch Q, and the both ends of controlling brancher are distinguished
It is connected with two output ends of compensation network, when controlling switch Q closures, controlling brancher conducting, when controlling switch Q disconnections,
Controlling brancher disconnects.Driving unit D can drive control switch Q disconnection and closure.Control unit U can be warm close to presetting in water temperature
When angle value, control driving unit D drive control switches Q is closed, controlling brancher is connected, to control resonant capacitance C and compensation
Network is in parallel, enters detuning state to control energy acceptance end.
It should be appreciated that control energy acceptance end enter detuning state only for convenience of subsequently to energy transmitting end input current and
The detection of input voltage enters detuning state to maintain the normal operation of wireless power electric heater at control energy acceptance end
After reaching preset time, the connection between resonant capacitance and compensation network can be disconnected, energy receiving terminal is switched to normal humorous
It shakes state.Wherein, preset time can be smaller numerical value, energy receiving terminal can be made briefly to enter detuning state, after guarantee
Continuous detection.
S603, when energy acceptance end enters detuning state, the amplitude of the input current at detection energy transmitting end.
S604, if the amplitude of the input current at energy transmitting end and the difference of default amplitude are more than the first predetermined threshold value,
Then further detect the input voltage zero crossing and input current zero crossing at energy transmitting end.
S605 calculates input current and the input at energy transmitting end according to input voltage zero crossing and input current zero crossing
The phase difference of voltage.
Fig. 3 is the input current at energy transmitting end when energy acceptance end is in resonant condition according to the embodiment of the present invention
With the schematic diagram of input voltage, Fig. 4 be according to the embodiment of the present invention energy acceptance end enter detuning state when energy transmitting
The input current at end and the schematic diagram of input voltage.It as shown in Figure 3 and Figure 4, can if energy acceptance end enters detuning state
The phase difference of input current, input voltage and the input current and input voltage of measuring transmitting terminal will change.Therefore, exist
In the embodiment of the present invention, energy acceptance end can be judged by the detection of input current and input voltage to energy transmitting end
Whether detuning state is entered, to further determine the water temperature in wireless power electric heater whether close to preset temperature value.
If the difference of the amplitude that should be appreciated that the input current at energy transmitting end and default amplitude is more than the first default threshold
Value, then the amplitude of the input current at energy transmitting end changes greatly.In one embodiment of the invention, following formula can be passed through
Calculate the phase difference of the input current and input voltage at energy transmitting end：
Wherein, ω is phase difference, tiFor input current zero crossing, tvFor input voltage zero crossing, T is the week of input current
Phase, π are constant, and % is complementation operator.
S606 reduces the input power at energy transmitting end if phase difference is more than the second predetermined threshold value.
If phase difference is more than the second predetermined threshold value, it can determine that energy acceptance end enters detuning state, so as into one
Step judges the water temperature in wireless power electric heater close to preset temperature value.At this point, the input power at energy transmitting end can be reduced,
So that the water temperature in wireless power electric heater is no longer significantly raised and lowered, and be maintained close to preset temperature value range it
It is interior.
In one embodiment of the invention, as shown in figure 5, energy transmitting end may particularly include：Another AC/DC transformation
Device, filter, DC/DC converters, inverter and transmitting coil.To improve the active power and electric energy conversion effect at energy transmitting end
Rate, energy transmitting end may also include another compensation network.Wherein, another AC/DC converters are connected with AC power, can be used for by
AC power is converted to DC power supply.In an embodiment of the present invention, AC power can be the alternating current of 220V, and the frequency of alternating current can
For 50Hz.Filter can be used for removing the clutter in DC power supply.DC/DC converters can be used for changing the voltage of DC power supply.
Inverter can be used for DC power supply being converted to high-frequency ac power, and input high-frequency ac power to transmitting coil.In this hair
In bright embodiment, it is based on above structure, the defeated of energy transmitting end can be controlled by controlling the output voltage of DC/DC converters
Enter power.
The entrance of energy acceptance end is utilized in the Poewr control method of wireless power electric heater according to the ... of the embodiment of the present invention
When detuning state, the principle of significant changes will occur for the input current and input voltage at energy transmitting end, in wireless power electric heating
When water temperature in hydrophone is close to preset temperature value, controllable energy receiving terminal enters detuning state, can detect energy as a result,
When measuring the input current and input voltage generation significant changes of transmitting terminal, the input power at energy transmitting end is reduced, consequently facilitating
Within the scope of the water temperature in wireless power electric heater is effectively maintained close to preset temperature value, wireless power is realized
The thermostatic control of electric heater, and it realizes that simply cost is relatively low, while thermostatically controlled accuracy is higher.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (11)
1. a kind of power control device of wireless power electric heater, which is characterized in that the wireless power electric heater includes
Energy transmitting end and energy acceptance end, when the wireless power electric heater starts, the energy transmitting end and energy acceptance
End is in resonant condition, and described device includes：
Temperature detecting module, the temperature detecting module are used for when the wireless power electric heater starts, and detect the nothing
Water temperature in line power supply electric heater；
First control module, first control module are used for when the water temperature is close to preset temperature value, control the energy
Receiving terminal enters detuning state；
Measure voltage ＆amp, the measure voltage ＆amp are used for when the energy acceptance end enters detuning state,
The amplitude of the input current at the energy transmitting end is detected, if the amplitude of the input current at the energy transmitting end and default width
The difference of value is more than the first predetermined threshold value, then further detects the input voltage zero crossing and input current at the energy transmitting end
Zero crossing；
Second control module, second control module are used for according to the input voltage zero crossing and the input current zero passage
Point calculates the phase difference of the input current and input voltage at the energy transmitting end, and is more than the second default threshold in the phase difference
When value, the input power at the energy transmitting end is reduced.
2. the power control device of wireless power electric heater according to claim 1, which is characterized in that the energy hair
It includes transmitting coil to penetrate end, and the transmitting coil generates magnetic field according to the input current at the energy transmitting end, and the energy connects
Receiving end includes receiving coil, compensation network and AC/DC converters, and the receiving coil generates induction electric according to the magnetic field
Gesture, it is defeated after the compensation network is used to the voltage and current for the alternating current that the induced electromotive force generates being adjusted to same-phase
Enter the AC/DC converters.
3. the power control device of wireless power electric heater according to claim 2, which is characterized in that first control
Molding block includes：
Resonant capacitance；
Control switch, the resonant capacitance connects to form controlling brancher with control switch, by the both ends of the controlling brancher
It is connected respectively with two output ends of the compensation network, when the control is switched and is closed, the controlling brancher conducting, in institute
When stating control switch disconnection, the controlling brancher disconnects；
Driving unit, the driving unit are used to drive disconnection and the closure of the control switch；
Control unit, described control unit are used for when the water temperature is close to preset temperature value, control the driving unit driving
The control switch is closed, in parallel with the compensation network to control the resonant capacitance the controlling brancher is connected, with
It controls the energy acceptance end and enters detuning state.
4. the power control device of wireless power electric heater according to claim 1, which is characterized in that second control
Molding block is calculated by the following formula the phase difference of the input current and input voltage at the energy transmitting end：
Wherein, ω is the phase difference, tiFor the input current zero crossing, tvFor the input voltage zero crossing, T is described
The period of input current, π are constant, and % is complementation operator.
5. the power control device of wireless power electric heater according to claim 3, which is characterized in that the control is single
Member is additionally operable to：
After controlling the energy acceptance end and reaching preset time into detuning state, controls the driving unit and drive the control
System switch disconnects, and to disconnect the connection between the resonant capacitance and the compensation network, the energy acceptance end is cut
Shift to normal resonant condition.
6. a kind of wireless power electric heater, which is characterized in that including according to claim 1-5 any one of them wireless powers
The power control device of electric heater.
7. a kind of Poewr control method of wireless power electric heater, which is characterized in that the wireless power electric heater includes
Energy transmitting end and energy acceptance end, when the wireless power electric heater starts, the energy transmitting end and the energy
Receiving terminal is in resonant condition, the described method comprises the following steps：
When the wireless power electric heater starts, the water temperature in the wireless power electric heater is detected；
If the water temperature controls the energy acceptance end and enters detuning state close to preset temperature value；
When the energy acceptance end enters detuning state, the amplitude of the input current at the energy transmitting end is detected；
If the amplitude of the input current at the energy transmitting end and the difference of default amplitude are more than the first predetermined threshold value, into one
Step detects the input voltage zero crossing and input current zero crossing at the energy transmitting end；
According to the input voltage zero crossing and the input current zero crossing calculate the energy transmitting end input current and
The phase difference of input voltage；
If the phase difference is more than the second predetermined threshold value, the input power at the energy transmitting end is reduced.
8. the Poewr control method of wireless power electric heater according to claim 7, which is characterized in that the energy hair
It includes transmitting coil to penetrate end, and the transmitting coil generates magnetic field according to the input current at the energy transmitting end, and the energy connects
Receiving end includes receiving coil, compensation network and AC/DC converters, and the receiving coil generates induction electric according to the magnetic field
Gesture, it is defeated after the compensation network is used to the voltage and current for the alternating current that the induced electromotive force generates being adjusted to same-phase
Enter the AC/DC converters.
9. the Poewr control method of wireless power electric heater according to claim 8, which is characterized in that humorous by controlling
The capacitance that shakes is in parallel with the compensation network, enters detuning state to control the energy acceptance end.
10. the Poewr control method of wireless power electric heater according to claim 7, which is characterized in that by following
Formula calculates the phase difference of the input current and input voltage at the energy transmitting end：
Wherein, ω is the phase difference, tiFor the input current zero crossing, tvFor the input voltage zero crossing, T is described
The period of input current, π are constant, and % is complementation operator.
11. the Poewr control method of wireless power electric heater according to claim 9, which is characterized in that further include：
After controlling the energy acceptance end and reaching preset time into detuning state, the resonant capacitance and the compensation are disconnected
The energy acceptance end is switched to normal resonant condition by the connection between network.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610012483.6A CN105674571B (en) | 2016-01-05 | 2016-01-05 | Wireless power electric heater and its power control device and method |
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| CN201610012483.6A CN105674571B (en) | 2016-01-05 | 2016-01-05 | Wireless power electric heater and its power control device and method |
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| CN105674571B true CN105674571B (en) | 2018-08-17 |
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| CN107482792A (en) * | 2017-08-11 | 2017-12-15 | 中惠创智（深圳）无线供电技术有限公司 | Wireless power water heater |
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|---|---|---|---|---|
| US6002114A (en) * | 1998-09-15 | 1999-12-14 | Lee; Ming-Hsiu | Control device for an electric water heater |
| CN102157987A (en) * | 2011-03-08 | 2011-08-17 | 韩丽 | Non-contact type high-power energy transmission system and application |
| CN103746464A (en) * | 2013-12-26 | 2014-04-23 | 芜湖美的厨卫电器制造有限公司 | An electric water heater and a wireless power supply control method thereof |
| CN203761146U (en) * | 2014-02-28 | 2014-08-06 | 广东美的生活电器制造有限公司 | Wireless energy transmission system, cooking electric equipment, and wireless energy receiving circuit |
| CN204853991U (en) * | 2015-06-03 | 2015-12-09 | 陈昌雄 | Novel control of electromagnetism water heater device |
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2016
- 2016-01-05 CN CN201610012483.6A patent/CN105674571B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6002114A (en) * | 1998-09-15 | 1999-12-14 | Lee; Ming-Hsiu | Control device for an electric water heater |
| CN102157987A (en) * | 2011-03-08 | 2011-08-17 | 韩丽 | Non-contact type high-power energy transmission system and application |
| CN103746464A (en) * | 2013-12-26 | 2014-04-23 | 芜湖美的厨卫电器制造有限公司 | An electric water heater and a wireless power supply control method thereof |
| CN203761146U (en) * | 2014-02-28 | 2014-08-06 | 广东美的生活电器制造有限公司 | Wireless energy transmission system, cooking electric equipment, and wireless energy receiving circuit |
| CN204853991U (en) * | 2015-06-03 | 2015-12-09 | 陈昌雄 | Novel control of electromagnetism water heater device |
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Effective date of registration: 20221104 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 241009 Meimei Kitchen and Sanitary Industrial Park, Wanchun East Road, East District, Wuhu Economic and Technological Development Zone, Anhui Province Patentee before: WUHU MIDEA KITCHEN AND BATH APPLIANCES MFG. Co.,Ltd. Patentee before: MIDEA GROUP Co.,Ltd. |