CN105432140B - Induction heating apparatus - Google Patents

Induction heating apparatus Download PDF

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Publication number
CN105432140B
CN105432140B CN201380045749.1A CN201380045749A CN105432140B CN 105432140 B CN105432140 B CN 105432140B CN 201380045749 A CN201380045749 A CN 201380045749A CN 105432140 B CN105432140 B CN 105432140B
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China
Prior art keywords
cooking
vessel
heating coil
heating
detection
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CN201380045749.1A
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Chinese (zh)
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CN105432140A (en
Inventor
藤涛知也
北泉武
黑濑洋
黑濑洋一
片冈章
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Classifications

    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/03—Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/05—Heating plates with pan detection means
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

Abstract

Induction heating apparatus has：Top plate, it loads the cooking-vessel of heating gratin；Multiple heating coils, they closely configure and produce the magnetic field for heating cooking-vessel；Heating control section, it controls the high frequency electric passed through in each heating coil, to control the heating power of cooking-vessel；Cooking-vessel test section, it carries out cooking-vessel detection work, and the cooking-vessel detection operation detection goes out whether the top of each heating coil is placed with cooking-vessel；Operating portion, it shows the testing result of cooking-vessel test section；And priority determination section, for each heating coil, determine by cooking-vessel test section to whether being placed with the priority of heating coil when cooking-vessel detects, for cooking-vessel test section according to the priority determined, the cooking-vessel for whether being placed with cooking-vessel above it for each heating coil detects work.Thus, because the high heating coil of the possibility for being placed with cooking-vessel carries out cooking-vessel detection work, therefore, it is possible to detect cooking-vessel as early as possible, additionally it is possible to suppress power consumption.

Description

Induction heating apparatus
Technical field
The present invention relates to the sense that the cooking-vessels such as the metal cooking pot to being positioned on top plate carry out sensing heating Answer heater.
Background technology
Past, in the induction heating cooking instrument of induction heating apparatus is typically used for, for a heating gate, by one Or multiple heating coils are disposed in the underface of top plate.In the in general induction heating cooking instrument, it is configured to utilize heater wire Enclose and sensing heating is carried out to metal cooking pot as cooking-vessel for being positioned on top plate etc..
In addition, in other induction heating cooking instruments, it is also proposed that multiple heating coils are disposed in into top plate with rectangular Underface so-called multi-thread coil structures (referring for example to patent document 1).
Induction heating cooking instrument described in patent document 1 has following structure：Multiple heating are paved with below top plate Coil, and the plurality of coil be closely configured to it is rectangular, even if by the cooking-vessels such as cooking pot be positioned in top plate appoint Anticipate on position, can also carry out sensing heating.In addition, in the induction heating cooking instrument, be configured to carry out on operating portion with The related display of the mounting position of cooking-vessel, size, is operated by user, thus carries out the group of each heating coil Work and cooking-vessel is heated.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2008-293871 publications
The content of the invention
Invent problem to be solved
As described above, in the induction heating cooking instrument described in patent document 1, cooking-vessel can be positioned in top plate On optional position on.Therefore, it is the multiple cookings in the case where cooking-vessel is a cooking-vessel or in cooking-vessel In the case of container, it is required to make display part show its state.Thus, user can visual identification go out heating instruction object It is which cooking-vessel.
In the case of in general induction heating cooking instrument, for a heating gate, there is corresponding operating portion.Using Person is after operating portion carries out heating instruction, if it is that the cooking that can be heated is held to be discriminated whether before heating work is performed Device and which type of material, then can be heated with optimal conditions.
On the other hand, it is positioned in any position also enter even if by cooking-vessel heating coil to be configured to rectangular In the induction heating cooking instrument of row heating, it is necessary to detect to be placed with the situation of cooking-vessel and show before the operation of heating Show on operating portion.
As the detection method of cooking-vessel, following method etc. is described：Flowed through in each heating coil than carrying out The electric current of higher frequency during heating, according to heating coil current value now etc., determine whether to be placed with load.
However, in the existing structure, following problem be present：Matrix is being configured to applied to by multiple heating coils It is only to cook if carrying out the work simultaneously therefore because heating coil is multiple during the induction heating cooking instrument of shape Container detection work is also required to many power and time.
In addition, also need to flow out high frequency electric simultaneously so as to detect the circuit of work, and then make equipment large-scale Change.
Additionally, there are following problem etc.：Due to needing to perform the detection work of cooking-vessel all the time, therefore, by heater wire Heating increases caused by circle, can burn up coil in the case of the worst.
In addition, in the case where the quantity of the inverter for making high frequency electric outflow is fewer than the quantity of heating coil, need Which to be switched over to flowing through high frequency electric in heating coil, in order to switch over and the durability of required relay etc. On problem be present.
In addition, following problem also be present：In order to cut down switching and power consumption, for each heating coil, every fixed interval In the case of regularly flowing into high frequency electric, played from mounting load and spend the time untill detecting.
As described above, in the case of being provided in the multi-thread coil structures that multiple heating coils are paved with below top plate, weight What is wanted is how to detect cooking-vessel.
The present invention solves above-mentioned existing problem, and its object is to provide a kind of induction heating apparatus, it is to being placed on Cooking-vessel on top plate is shown and forms the easy-to-use heater of user, and inhibits power consumption.
Means for solving the problems
The induction heating apparatus of the present invention has：Top plate, it loads the cooking-vessel of heating gratin；Multiple heater wires Circle, they closely configure and produce the magnetic field for heating the cooking-vessel；Heating control section, it controls the multiple add The high frequency electric passed through in each heating coil of heat coil, to control the heating power of the cooking-vessel；Cooking-vessel detects Portion, it carries out cooking-vessel detection work, and the cooking-vessel detection work is that detection is above each heating coil It is no to be placed with the cooking-vessel；Operating portion, it shows the testing result of the cooking-vessel test section；And priority is determined Determine portion, it is directed to each heating coil of the multiple heating coil, determines by the cooking-vessel test section to whether being placed with The priority of heating coil when the cooking-vessel is detected, the cooking-vessel test section is according to by described preferential suitable Whether the priority that sequence determination section determines, the cooking-vessel is placed with for each heating coil above it Cooking-vessel detects work.
Invention effect
The induction heating apparatus of the present invention holds according to the priority determined by priority determination section for placing to cook The high heating coil of the possibility of device, carry out cooking-vessel detection work.It therefore, there is no need to flow all the time in all heating coils High frequency electric is crossed, and in the case of using relay, it is not required that often switch over, can detect to cook as early as possible Capacity transfer device.Thus, ease of use is good, additionally it is possible to suppresses power consumption.
Brief description of the drawings
Fig. 1 (a) and (b) are the block diagrams for the structure for showing the induction heating apparatus in the present invention.
Fig. 2 is the block diagram of the induction heating apparatus in embodiment 1.
Fig. 3 is the figure for the configuration for showing the heating coil in general induction heating apparatus.
Fig. 4 is the figure of the configuration for the heating coil for showing the induction heating apparatus in embodiment 1.
Fig. 5 is the outside drawing of the display example of the operating portion of the induction heating apparatus in embodiment 1.
Fig. 6 is the block diagram when detection assisted parts of the induction heating apparatus in embodiment 1 to be set to temperature detecting part.
Fig. 7 (a) and (b) are that the temperature detecting part for showing the induction heating apparatus in embodiment 2 is configured in heating The figure of state during the center of coil.
Fig. 8 (a) and (b) are that the temperature detecting part for showing the induction heating apparatus in embodiment 2 is configured in heating The figure of state during the center of coil.
Fig. 9 (a) and (b) are that the temperature detecting part for showing the induction heating apparatus in embodiment 2 is configured in heating The figure of state during the mutual center of coil.
Figure 10 is the frame when detection assisted parts of the induction heating apparatus in embodiment 5 is made up of electrostatic capacitance test section Figure.
Figure 11 is to show that the electrode configuration needed for the detection of electrostatic capacitance exists in the induction heating apparatus in embodiment 6 The figure of state during the center of multiple heating coils.
Figure 12 is to show that the electrode configuration needed for the detection of electrostatic capacitance exists in the induction heating apparatus in embodiment 7 The figure of state during the mutual approximate centre of heating coil.
Figure 13 is the block diagram when detection assisted parts of the induction heating apparatus in embodiment 8 is made up of vibration detecting part.
Figure 14 is that multiple vibration detecting parts of the induction heating apparatus in embodiment 9 estimate the position of vibration source When block diagram.
Figure 15 is the block diagram when detection assisted parts of the induction heating apparatus in embodiment 10 is made up of distance estimations portion.
Figure 16 is the block diagram of the induction heating apparatus in embodiment 11.
Figure 17 (a) and (b) are the figures of the configuration for the heating coil for showing the induction heating apparatus in embodiment 12.
Figure 18 (a) and (b) are the heating coil and cooking-vessel for showing the induction heating apparatus in embodiment 12 The figure of configuration.
Figure 19 (a) is the figure of the address for the heating coil for showing the induction heating apparatus in embodiment 14, and (b) is to show (a) figure of the usage frequency of each heating coil.
Figure 20 is the block diagram of the induction heating apparatus in embodiment 20.
Embodiment
The induction heating apparatus of 1st mode, has：Top plate, it loads the cooking-vessel for heating gratin；It is multiple to add Heat coil, they closely configure and produce the magnetic field for heating the cooking-vessel；Heating control section, its control are described more The high frequency electric passed through in each heating coil of individual heating coil, to control the heating power of the cooking-vessel；Cooking-vessel Test section, it carries out cooking-vessel detection work, and the cooking-vessel detection work is used to detect in each heating coil Top whether be placed with the cooking-vessel；Operating portion, it shows the testing result of the cooking-vessel test section；It is and excellent First order determination section, it is directed to each heating coil of the multiple heating coil, determined in the cooking-vessel test section to institute State cooking-vessel whether the priority of the heating coil detected by mounting, determined according to by the priority determination section Priority, whether the cooking-vessel test section be placed with the cooking above it for each heating coil The cooking-vessel detection work of container.
According to the 1st mode, according to the priority determined by priority determination section, the possibility for placing cooking-vessel Property high heating coil, carry out cooking-vessel detection work.Therefore, it is possible to detect cooking-vessel as early as possible, additionally it is possible to suppress work( Consumption.
Fig. 1 (a) and (b) are the block diagrams for the structure for showing the induction heating apparatus in the present invention.Filled in the sensing heating In putting, have：Load the top plate 2 of cooking-vessel 1；The multiple heating coils 3 closely configured；Heating control section 4, its control are more The high frequency electric passed through in each heating coil of individual heating coil 3；Cooking-vessel test section 5, it carries out the detection of cooking-vessel 1 Work, is detected whether the top of each heating coil 3 is placed with cooking-vessel 1；Operating portion 6, display cooking-vessel test section 5 Testing result；And priority determination section 20.Priority determination section 20 is directed to each heating coil of multiple heating coils 3, The priority of heating coil 3 when determining to detect whether to be placed with cooking-vessel 1 by cooking-vessel test section 5.
As described above, by priority determination section 20, determine to be detected whether to be placed with the cooking by cooking-vessel test section 5 The priority of heating coil 3 during container 1.The priority can also be the either case in following situation：Selection is by cooking Capacity transfer device test section 5 preferentially carries out the situation of the heating coil 3 of the detection work of cooking-vessel 1：And to each heating coil 3 Each heating coil be set for respectively cooking-vessel 1 detection work detection frequency situation.It can also be set as, The detection frequency of heating coil 3 is higher, then more preferentially carries out detection work.
In addition, the configuration position of priority determination section 20 is not particularly limited.The configuration section of priority determination section 20 Position can for example enumerate Fig. 1 (a) or (b) structure.In the case of Fig. 1 (a), priority determination section 20 is connected to heating control Portion 4 processed.Fig. 1 (a) equivalent to for example by describe below detection assisted parts 21, temperature detecting part 22, electrostatic capacitance test section 12, Vibration detecting part 13, location estimation portion 14, distance estimations portion 17 etc. form the situation of priority determination section 20.In addition, in Fig. 1 (b) in the case of, priority determination section 20 is arranged between heating control section 4 and cooking-vessel test section 5.Fig. 1 (b) phases When in forming priority determination section 20 such as the test position determination section 23 by describing below, detection work determination section 31 Situation.
The induction heating apparatus of 2nd mode can also be：In above-mentioned 1st mode, the priority determination section includes Assisted parts is detected, the detection assisted parts detects the object on the top plate.Also, detect object in the detection assisted parts In the case of, the heating coil that the cooking-vessel test section is directed to around the object detected is made whether to be placed with The cooking-vessel detection work of cooking-vessel.
According to the 2nd mode, the object on top plate is simply detected by detection assisted parts, is detecting the situation of object Under, for the heating coil around the object that detects, it is made whether to be placed with cooking-vessel by cooking-vessel test section Cooking-vessel detects work.Accordingly, it is not necessary to carry out the work for detecting cooking-vessel all the time, therefore power consumption can be reduced. In addition, in the case where needing to be switched over by relay etc., it is possible to increase the durability of relay.
The induction heating apparatus of 3rd mode can also be：In above-mentioned 2nd mode, the detection assisted parts is examined by temperature Survey portion is formed, and the temperature detecting part detects the temperature of the object.
According to the 3rd mode, due to temperature in use test section, therefore object can be detected in advance quickly and with low power. Further, since heating coil is not used, therefore switched over also without by relay etc., so as to improve the resistance to of relay Long property.
The induction heating apparatus of 4th mode can also be：In above-mentioned 3rd mode, detected by the temperature detecting part When going out the temperature change of the object, the cooking-vessel test section is only for positioned at the portion of the temperature change detected Heating coil near position carries out cooking-vessel detection work.
According to the 4th mode, it is in multiple heating coils in quantity, it is high only for the possibility of mounting cooking-vessel Detect that the heating coil at the position of temperature change carries out the work for detecting cooking-vessel, therefore detection work can be shortened The time spent.
The induction heating apparatus of 5th mode can also be：In above-mentioned 3rd mode, the cooking-vessel test section every The fixed cycle carries out cooking-vessel detection work.
According to the 5th mode, even in cooking-vessel temperature with there is no difference and nothing by the part of temperature detecting part detection In the case that method detects temperature change, every the fixed cycle, cooking-vessel detection work is carried out by cooking-vessel test section, Therefore cooking-vessel can be prevented to be absorbed in undetectable state.
The induction heating apparatus of 6th mode can also be following manner：In above-mentioned 3rd mode, the temperature detecting part By the way of detection infrared ray is come measurement temperature.
According to the 6th mode, due to can also be known whether to carry using the change of light is disturbed in addition to the change of temperature Cooking-vessel is equipped with, therefore reduces the probability that failure is detected to the situation for being placed with cooking-vessel.
The induction heating apparatus of 7th mode can also be：In above-mentioned 2nd mode, the detection assisted parts by electrode and Electrostatic capacitance test section is formed, and the electrode is disposed in the lower surface of the top plate, the electrostatic capacitance test section detection due to The object is loaded on the upper surface of the top plate and in the electrode caused electrostatic capacitance change.
According to the 7th mode, due to the work for detecting cooking-vessel need not be carried out all the time, therefore work(can be reduced Consumption.In addition, in the case where needing to be switched over by relay etc., it is possible to increase the durability of relay.
The induction heating apparatus of 8th mode can also be：In above-mentioned 7th mode, the electrode configures in institute in couples State near each heating coil.
According to the 8th mode, for each heating coil, after detecting whether to there is a possibility that to load cooking-vessel Cooking-vessel detection work is carried out, therefore unnecessary cooking-vessel detection work can be reduced as far as.
The induction heating apparatus of 9th mode can also be：In above-mentioned 7th mode, the electrode configuration is adjacent more The position of the individual mutual approximate centre of heating coil.
According to the 9th mode, by reducing the quantity of electrode, it can prevent that the structure of equipment from becoming complicated and price uprises, Consumer can be supplied to cheap price.
The induction heating apparatus of 10th mode can also be：In above-mentioned 2nd mode, the detection assisted parts is by detecting institute The vibration detecting part for stating the vibration of top plate is formed.
According to the 10th mode, by detecting the caused vibration on top plate, the cooking whether is placed with top plate to detect Container and carry out cooking-vessel detection work, thus reduce detection work number, power consumption can be reduced, need by relay In the case of switching over, it is possible to increase the durability of relay.
The induction heating apparatus of 11st mode can also be：In above-mentioned 10th mode, the induction heating apparatus is provided with Multiple vibration detecting parts, also with location estimation portion, what the location estimation portion detected according to the vibration detecting part The phase difference of multiple vibrational waveforms estimates the position of vibration source.
, can be only for the possibility height of mounting cooking-vessel by estimating the position of vibration source according to the 11st mode Part carry out cooking-vessel detection work.Thereby, it is possible to reduce cooking-vessel detection work times.
The induction heating apparatus of 12nd mode can also be：In above-mentioned 2nd mode, the detection assisted parts is by lighting Portion, light accepting part and distance estimations portion are formed, and the light quantity that the distance estimations portion receives according to the light accepting part is estimated and position In the distance between object of top of the light accepting part.
According to the 12nd mode, determine whether to be placed with cooking-vessel according to the light quantity of light accepting part so that cook in mounting Cooking-vessel detection work is carried out in the presence of the possibility of container, thus reduces detection work times.
The induction heating apparatus of 13rd mode can also be：In above-mentioned 1st mode, the priority determination section includes Test position determination section, the test position determination section determine detection frequency, and the detection frequency is examined with the cooking-vessel Survey portion carries out cooking-vessel detection work correlation for each heating coil of the multiple heating coil with which type of frequency Detection frequency.
According to the 13rd mode, the heating coil high to the possibility of mounting cooking-vessel carries out cooking-vessel inspection with frequent Work is surveyed, and cooking-vessel detection work is carried out with low-frequency degree to loading the possibility of cooking-vessel low heating coil, thus The time spent untill detecting cooking-vessel can be shortened, and cooking-vessel detection work times can be reduced.Pass through So handle, it is suppressed that the consumption of the power required for cooking-vessel detection work, switching inverter circuit using relay With heating coil as in the case of structure, it is possible to increase the durability of relay.
The induction heating apparatus of 14th mode can also be：In above-mentioned 13rd mode, the test position determination section will The detection frequency of heating coil of the configuration on the position in most peripheral portion in the multiple heating coil be set to than it is described most The detection frequency of heating coil beyond peripheral part is low.
According to the 14th mode, compared with configuring in the heating coil in most peripheral portion, the adjacent heating in inside is configured The possibility of mounting cooking-vessel is higher on coil, therefore even if reduces the number of detection work to the heating coil in most peripheral portion (detection frequency), also influence less, to detect number by reducing, the consumption of power can be suppressed to caused by ease of use.
The induction heating apparatus of 15th mode can also be：In above-mentioned 13rd mode, when detecting in a heater wire In the case of being placed with cooking-vessel above circle, the cooking-vessel test section is directed to the heater wire adjacent with the heating coil Circle, also carry out cooking-vessel detection work.
According to the 15th mode, in the case of being placed with cooking-vessel on a heating coil, with the heating coil phase Also it is high that the possibility of cooking-vessel is loaded on adjacent heating coil, therefore is directed to adjacent heating coil, also carries out cooking appearance Device detects work.Thereby, it is possible to detect the correct positions and dimensions of cooking-vessel 1.
The induction heating apparatus of 16th mode can also be：In above-mentioned 15th mode, even in the adjacent heating In the case that the detection frequency of coil is set lower than the detection frequency of other heating coils, the cooking-vessel test section Cooking-vessel detection work is carried out at once for the adjacent heating coil.
According to the 16th mode, in the case of detecting to be placed with cooking-vessel on a heating coil, even in pin To adjacent heating coil will detect frequency be set to it is low in the case of, due on the adjacent heating coil mounting cook hold The possibility of device is high, therefore also carries out cooking-vessel detection work at once for adjacent heating coil.Thereby, it is possible to detect Go out the correct positions and dimensions of cooking-vessel 1.
The induction heating apparatus of 17th mode can also be：In above-mentioned 13rd mode, the test position determination section root Position and number according to the heating coil for being placed with the cooking-vessel detected in a period of regulation, setting is described respectively to be added The detection frequency of heat coil.
According to the 17th mode, according to the rules during in it is past use virtual condition, learn the heater wire being commonly used The position of circle, and then the detection frequency corresponding with the usage frequency for each heating coil can be set.Therefore, for using The high heating coil of frequency, more examinations work, thus, it is possible to detect cooking-vessel as early as possible.On the contrary, for not why The heating coil on position used, reduce the number of detection work, the consumption thus, it is possible to suppress power.
The induction heating apparatus of 18th mode can also be：In above-mentioned 13rd mode, the test position determination section will The detection frequency configured in the heating coil of the operating portion side is set to the direction than being disposed substantially away from the operating portion On the heating coil detection frequency it is high.
According to the 18th mode, because the heating coil being located remotely from the position of operating portion is remote from user, therefore use Convenience somewhat reduces, and then usage frequency often step-down.So as to high detection frequency come to inclining with usage frequency is high To heating coil of the configuration in operating portion side carry out detection work, cooking-vessel can be detected as early as possible.
The induction heating apparatus of 19th mode can also be：In above-mentioned 13rd mode, the test position determination section will The detection of the heating coil on the direction of the operating portion is disposed substantially away from relative to the heating coil for carrying out heating work Frequency is set to than configuring the heating coil in the operating portion side relative to the heating coil for carrying out heating work Detection frequency it is low.
According to the 19th mode, on the basis of carrying out the heating coil of heating work, configure and be closer to by comparison Inner side, the heating coil i.e. on the direction away from operating portion, are not easy to load by the obstruction of the cooking-vessel in heating Cooking-vessel.So as to which the frequency used is extremely low.Thus, for being configured relative to the heating coil for carrying out heating work Heating coil on direction away from operating portion, detection frequency is reduced to reduce the number of detection work, thus, it is possible to suppress work( The consumption of rate.
The induction heating apparatus of 20th mode can also be：In above-mentioned 13rd mode, the test position determination section will The detection frequency of the adjacent heating coil of heating coil with carrying out heating work is set to than heater wire in addition The detection frequency of circle is low.
According to the 20th mode, if it is desired to loaded on the adjacent heating coil of the heating coil with carrying out heating work Cooking-vessel, then it is not easy to be loaded by the obstruction of the flange of cooking-vessel etc..In addition, it will not generally make cooking-vessel close Connect and heated, therefore the possibility of mounting cooking-vessel is low on the heating coil adjacent with the heating coil in heating. So as to for the adjacent heating coil of the heating coil with carrying out heating work, reduce detection frequency to reduce detection work The number of work, the consumption thus, it is possible to suppress power.
The induction heating apparatus of 21st mode can also be：In above-mentioned 13rd mode, to carrying out heating work Heating coil in the case that cataclysm occurs for the controlling value of the heating control section that is controlled of the high frequency electric that passes through, institute Test position determination section is stated to set the detection frequency of the heating coil adjacent with the heating coil for carrying out heating work Surely must be higher than the detection frequency of heating coil in addition.
It is identical before being intended for giving this in the case of the cooking-vessel in moving heating according to the 21st mode Power in the case of, heating control section needs the controlling value of the switch element such as IGBT to forming inverter circuit to change. Specifically, in the case where controlling power by the frequency of switch, it is necessary to reduce frequency, power is being controlled with conduction ratio In the case of, it is necessary to improve conduction ratio.In the case of no mobile cooking-vessel, these controlling values are constant or only occur Slowly change.On the contrary, in the case where moving cooking-vessel, cataclysm occurs for controlling value.So as to which cataclysm occur in controlling value In the case of, due to moving cooking-vessel, therefore cooking-vessel is moved to the heating adjacent with the heating coil in heating The possibility loaded on coil is high.Thus, frequency is detected by improving, thus, it is possible to detect cooking-vessel as early as possible.
The induction heating apparatus of 22nd mode can also be：In above-mentioned 13rd mode, the induction heating apparatus also has Have electric power source operation portion, the electric power source operation portion allow hand over whether to the operating portion supply power supply, from user to the electricity Source operating portion operated and as to the operating portion supply power supply state rise have passed through the defined time in the case of, institute State test position determination section and be directed to all the multiple heating coils, reduce detection frequency on the whole or set detection frequency It is set to zero.
According to the 22nd mode, user electric power source operation portion is operated and as supply power supply state when, repeatedly Cooking-vessel detection work is carried out, but carries out other cooking operations etc. sometimes and does not slowly load cooking-vessel.Due to herein Period also carries out cooking-vessel detection work, therefore can unnecessarily consume power.Thus, even if having passed through the stipulated time Also in the case of not loading cooking-vessel, the frequency for carrying out cooking-vessel detection work is reduced, thus, it is possible to suppress disappearing for power Consumption.
The induction heating apparatus of 23rd mode can also be：In above-mentioned 1st mode, the priority determination section includes Work determination section is detected, the detection work determination section determines the cooking-vessel test section for the multiple heating coil Whether each heating coil carries out cooking-vessel detection work.
According to the 23rd mode, due to being cooked at the time of the possibility for loading cooking-vessel or mobile cooking-vessel is high Capacity transfer device detects work, therefore can detect cooking-vessel as early as possible, and can also reduce time of unnecessary detection work Number.
The induction heating apparatus of 24th mode can also be：In above-mentioned 23rd mode, from user finally to described Operating portion operated have passed through the defined time in the case of, the detection work determination section for all the multiple plus Heat coil, detection frequency is reduced on the whole or detection frequency is set as zero.
According to the 24th mode, because the possibility of mounting cooking-vessel or mobile cooking-vessel is low, therefore reduce herein The detection work times of period, use power thus, it is possible to cut down, it is possible to increase the durability of relay.
The induction heating apparatus of 25th mode can also be：In above-mentioned 23rd mode, the induction heating apparatus also has There is the body detecting part of detection human body, in the case where the body detecting part detects people, the cooking-vessel test section is opened Begin to carry out cooking-vessel detection work.
According to the 25th mode, in the case that user is near induction heating apparatus, mounting or mobile cook are held The possibility of device is high, therefore proceeds by cooking-vessel detection work, thus, it is possible to detect cooking-vessel as early as possible.
The induction heating apparatus of 26th mode can also be：In above-mentioned 25th mode, do not examined in the body detecting part In the case of measuring people, the cooking-vessel test section stops cooking-vessel detection work.
According to the 26th mode, in the case that user is not near induction heating apparatus, it will not load or movement is cooked Capacity transfer device, therefore stop carrying out cooking-vessel detection work, so as to reduce power consumption, it is possible to increase the durability of relay.
With reference to the accompanying drawings, embodiments of the present invention are described in detail.For example, known thing is omitted sometimes The detailed description of item and the repeat specification to substantially the same structure.This is in order to avoid following explanation becomes unnecessary Ground is tediously long, and in order that those skilled in the art will be readily understood that.
In order that people in the art is completely understood by the present invention and inventor provides accompanying drawing and following explanation, this It is a little to be not intended to limit the theme described in claims.
In the induction heating apparatus of following embodiment, induction heating cooking instrument is illustrated, but the structure It is example, the present invention is not limited to the structure illustrated in following embodiment, and it is special to contain the technology with the present invention The induction heating apparatus of sign.In addition, the present invention contains any knot illustrated in the appropriately combined each embodiment being set forth below The structure obtained after structure, each effect is played in the structure obtained after combining.
(embodiment 1)
Fig. 2 is the state that cooking-vessel is placed with the induction heating apparatus being shown schematically in embodiment 1 Block diagram.Figure 2 illustrates the state that cooking-vessel 1 is placed with built-in induction heating cooking instrument.
Cooking-vessel 1 shown in Fig. 2 is the container for being put into the cooked such as food materials, is pot, frying pan, kettle etc..
Cooking-vessel 1 is positioned on the top plate 2 for the peripheral part to form induction heating cooking instrument.Top plate 2 uses The situation of devitrified glass is more, but not limited to this.
Using the high frequency electric indicated to be supplied to according to heating control section 4, heating coil 3 produces magnetic flux, to top Cooking-vessel 1 on plate 2 carries out sensing heating.
Heating control section 4 is connected to operating portion 6, inverter circuit 7, detection assisted parts 21, cooking-vessel test section 5.Add Thermal control portion 4 indicates that the operating portion 6 of heating power etc. is connected with for the user of induction heating cooking instrument, according to from user Heating instruction, supply power to inverter circuit 7, heating control section 4 controls supplied power, so as to user's phase The firepower of prestige.
Cooking-vessel test section 5 is configured to：Judge to whether there is the cooking-vessel 1 for being capable of sensing heating on heating coil 3, After heating control section 4 receives its result, the heating coil 3 that top has cooking-vessel 1 is only set to work.
Cooking-vessel test section 5 is just like lower unit etc.：The coil of detection is set, detects the change of inductance；Use heating Coil 3 and inverter circuit 7, the electric current of frequency higher during than heating is flowed through in heating coil 3, according to heating coil now Current value etc., determine whether to be placed with load.Cooking-vessel test section 5 is not limited to said units, can by any unit come Realize.
Realize that the situation of heating control section 4 is more by home computer, DSP, customization IC etc., but be not limited to This.In addition, all or part of function of heating control section 4, detection assisted parts 21, cooking-vessel test section 5 can also be by phase Formed with unit.
Here, Fig. 3 is the figure for the configuration for showing the heating coil in general induction heating apparatus.Fig. 4 is to show this reality Apply the figure of the configuration of the heating coil of the induction heating apparatus in mode 1.
Fig. 3 shows that heating coil 3 is a heating coil, but even if is added by smaller multiple heating coils to form Heat coil 3 is same.
First, the work in general induction heating cooking instrument illustrates.User makes cooking-vessel 1 face heating Coil 3 and be positioned on top plate 2.In in general induction heating cooking instrument, when not facing heating coil 3, Wu Fajin Row heating, therefore, the mark for the position for being used to indicate heating coil 3 typically on top plate 2 be present.
Next, user couple operating portion 6 corresponding with the heating coil 3 for being placed with cooking-vessel 1 operates, to determine Determine heating power etc. and input the instruction begun to warm up.
Here, operating portion 6 corresponding with heating coil 3 refers to, such as it is used to make the operating portion that heating coil 3a is operated 6a, equally, so, heating coil 3 and operating portion 6 are distinguished by heating coil 3b and operating portion 6b, heating coil 3c and operating portion 6c Corresponding situation is more.
Even in be not such situation, that is heating coil 3 and operating portion 6 may not it is corresponding in the case of, Also contemplate following method etc.：Such as feelings with each 3 corresponding operation button of heating coil are prepared in an operating portion 6 Under condition, to being switched over using heating coil 3a as control object or using heating coil 3b as control object.As adding Heat coil 3, in the context of fig. 3, only 3 types, therefore such means can be used.
Then, heating control section 4 sends the instruction for the detection work for carrying out cooking-vessel 1 to cooking-vessel test section 5, cooks Capacity transfer device test section 5 carries out the detection of cooking-vessel 1.By the detection work of cooking-vessel test section 5, determine whether to be placed with The cooking-vessel 1 that can heat, the material of cooking-vessel 1 are any materials, and sending this to heating control section 4, it determines result.
Heating control section 4 changes heating means according to the result.Specifically, in the situation for the load that can not be heated Under, the situation is shown on operating portion 6, working frequency of inverter circuit 7 etc. is changed according to the material of cooking-vessel 1, and then Heated with the heating power that user indicates.
As above, the reasons why detection work of cooking-vessel 1 is carried out in general induction heating cooking instrument is in order to optimal In the state of cooking-vessel 1 is heated, the detection work of cooking-vessel 1 be receive user heating instruction after, Carried out before heating.
Next, the work, effect to the induction heating cooking instrument of embodiment 1 illustrate.User, which will cook, to be held Device 1 is positioned in the optional position on top plate 2.At this time, it may be necessary to it is positioned on the heating coil 3 of at least more than one.In addition, also may be used To load multiple cooking-vessels 1.
Now, when user wants to heat certain specific cooking-vessel 1, due to not knowing that what cooking-vessel 1 is Size and be positioned in where on, therefore operating portion 6 can not prepare and 1 corresponding operating portion of the cooking-vessel in advance.
Therefore, heating control section 4 makes the detection work of the execution cooking-vessel 1 of cooking-vessel test section 5, to which type of chi Which position very little cooking-vessel 1 is positioned on and is detected, and operating portion 6 is shown the result.
But in operating portion 6, in the case that the cooking-vessel 1 detected is multiple, as long as multiple cook be present in display Capacity transfer device 1.In addition, when selecting a cooking-vessel 1 in multiple cooking-vessels 1, held by lighting the selected cooking Around device 1 etc., as long as knowing that the display in operating portion 6 is corresponding with the cooking-vessel 1 of reality.In addition, cooking-vessel 1 Size be not necessarily required to reflect in display.That is, as long as display can be wanted by operating portion 6 to user The specific cooking-vessel 1 of heating carries out the information that heating indicates this degree.
Specifically, as long as shown in figure 5, for example showing mark 8 corresponding with cooking-vessel 1 by operating portion 6.Figure 5 be the outside drawing of the display example of the operating portion 6 of the induction heating apparatus in embodiment 1.Mark 8 is shown in the left front of center One of a cooking-vessel 1 is loaded on the position of side.If loading multiple cooking-vessels 1, increase the mark of respective numbers 8。
Moreover, for example by selecting mark 8 corresponding with the desired cooking-vessel 1 for being used as heating target, to determine to operate Object, heating instruction can be inputted.
So, enterprising at an arbitrary position cooking-vessel 1 can be loaded by being adjacent to the multiple heating coils 3 of configuration In the induction heating cooking instrument of row heating, the detection work of cooking-vessel 1 is carried out before heating work is entered is and insufficient 's.If that is, not carrying out the detection work of cooking-vessel 1 all the time, no normal direction operating portion 6 is sent for representing to cook The mark 8 of container 1, and user can not input heating instruction.
In addition, it is also necessary to which detection is placed with the position of cooking-vessel 1, so as to judge which can make by heating control section 4 Heating coil 3 is operated.
So, the difference of existing induction heating cooking instrument and the induction heating cooking instrument of the present invention is, relative to bright The existing induction heating cooking instrument for really associating heating coil 3 with operating portion 6, the induction heating cooking of embodiment 1 Device makes heating coil 3 and operating portion 6 be changed according to the mounting position of cooking-vessel 1.In order to tackle the load of cooking-vessel 1 The change of seated position, it is necessary to carry out the detection work of cooking-vessel 1 in advance.
As the detection work of cooking-vessel 1, most efficient method is：As described above, flowed through in heating coil 3 than entering Higher high-frequency electric current, determines whether to be placed with load according to heating coil current value now etc. during row heating.Make With this method, when carrying out the detection work of cooking-vessel 1 simultaneously for all heating coils 3, although each institute of heating coil 3 The power of consumption is small, but because heating coil 3 is multiple, therefore, it, which adds up to, can continue the power of consumption more than tens watts.
It additionally, there are following problem：In order to carry out the detection work of cooking-vessel 1 simultaneously for all heating coils 3, need It is used in each heating coil 3 flow through the inverter circuit 7 of the electric current of frequency higher during than heating, and then makes equipment large-scale Change and price uprises.
Thus, it is contemplated that following manner：It is configured to switch multiple heating by relay etc. for an inverter circuit 7 Coil 3, and then high frequency electric is flowed successively through to detect cooking-vessel 1 in multiple heating coils 3.According to which, due to not Need to set the inverter circuit 7 with 3 identical quantity of heating coil, therefore miniaturization and the low price of equipment can be realized.
It can also be configured to set multiple inverter circuits 7, share the heating coil 3 being connected with each inverter circuit 7.By This, can carry out the detection work of cooking-vessel 1 corresponding with the quantity of inverter circuit 7 simultaneously.
However, it is necessary to the switching of relay frequently be carried out, so as to the durability of relay in the case of such structure As problem.Further, since switching inverter circuit 7 to carry out the detection work of cooking-vessel 1, hold therefore, because mounting is cooked At the time of at the time of device 1 and carrying out detection work, situation about being detected immediately and situation about not detected immediately are produced.
Specifically, such as it is set to the detection work of heating coil 3 and spends 0.2 second, an inverter circuit 7 is switched 5 heating coils 3 carry out the detection work of cooking-vessel 1, then from cooking-vessel 1 be placed on detect untill at most need The time of 1 second.In addition, during the detection work of each heating coil 3, there is provided blank time, the blank of such as 0.2 second when Between in the case of, a cycle for detecting work takes around the time of 2 seconds.
The quantity for the heating coil 3 being connected with an inverter circuit 7 more increases, and the time required for detecting more extends, from The time lag being placed on untill being shown on operating portion 6 increase of cooking-vessel 1, and then user feels abnormal, inconvenience makes With.
Thus, in present embodiment 1, there is the detection assisted parts 21 of the object simply detected on top plate 2.The inspection Survey assisted parts 21 to detect in object present on top plate 2, but the object beyond cooking-vessel 1 can also be detected.Detect auxiliary Portion 21 is helped can accurately to detect cooking-vessel 1 as cooking-vessel test section 5, as long as the thing on top plate 2 Body, detection assisted parts 21 can be detected simply.Assisted parts 21 is detected due to dependent on its testing agency, therefore is also had Shi Weibi detects all objects on top plate 2.As detection assisted parts 21, such as it is explained in detail hereinafter, can also be temperature inspection Survey portion 22, electrostatic capacitance test section, vibration detecting part, distance estimations portion, test position determination section, detection work determination section.Separately Outside, assisted parts 21 can also be detected by setting, controls the detection work of the cooking-vessel 1 carried out by cooking-vessel test section 5 Startup/shut-off.Thus, in the case where the possibility of mounting cooking-vessel 1 is small, the inspection of cooking-vessel test section 5 can be made Survey work stop (shut-off), and then can realize the reduction of power consumption, relay durability raising.In addition, passing through detection In the case that assisted parts 21 detects to be placed with the possibility of cooking-vessel 1, start the detection work of cooking-vessel test section 5 (startup), the heating coil 3 of the position for cooking-vessel 1 may be placed with, the detection work of cooking-vessel 1 is carried out, thus Can realize the reduction of power consumption, relay durability raising.
Fig. 6 is the block diagram when detection assisted parts of the induction heating apparatus in embodiment 1 is made up of temperature detecting part 22. In present embodiment 1, as detection assisted parts 21, there is provided the temperature for the temperature for being used to detect cooking-vessel 1 as shown in Figure 6 Test section 22.In the temperature that the temperature detecting part 22 detects there occurs during change, the temperature change that is detected be probably because Cooking-vessel 1 is loaded and has occurred.Therefore, the detection work of cooking-vessel 1 is just carried out when detecting temperature change, thus Detection work is only carried out when being placed with cooking-vessel 1.Thereby, it is possible to shorten from mounting cooking-vessel 1 to being detected as Time only, and can exclude due to repeat it is unwanted detection work and caused relay it is durable the problem of and The problem of the increase of power consumption.Thus, it is possible to as the good induction heating cooking instrument of ease of use.
(embodiment 2)
The induction heating apparatus of embodiment 2 is illustrated below.In the induction heating apparatus of embodiment 2, with The difference of the induction heating apparatus of foregoing embodiment 1 is, only for there occurs the temperature detecting part of temperature change Heating coil 3 near 22 carries out the detection work of cooking-vessel 1.
First, temperature detecting part 22 detects to the temperature of cooking-vessel 1, and its collocation method mainly considers two species Type.One is, using the situation of the method for the approximate center configuration in heating coil 3, matching somebody with somebody e.g. shown in Fig. 7, Fig. 8 Put.
Another is that using the situation of the method in adjacent 3 mutual approximate center of heating coil configuration, such as have Configuration shown in Fig. 9.In Fig. 7~Fig. 9,1 or 4 temperature detecting parts 22 are illustrate only respectively, but actually by temperature Degree test section 22 configures approximate centre, the 3 mutual approximate centre of heating coil in all or part of heating coil.
First, illustrated using Fig. 7.Fig. 7 (a) is the temperature detection for showing the induction heating apparatus in embodiment 2 The figure of the scope of the detection work for carrying out cooking-vessel 1 when portion 22 is configured in the center of heating coil 3.In addition, Fig. 7 (b) It is that the progress when temperature detecting part 22 of the induction heating apparatus in embodiment 2 is configured in the center of heating coil 3 is shown The figure of the scope of the detection work of cooking-vessel 1.
Following situation is studied：From the from left to right the 2nd row, the 2nd row from lower when overlooking induction heating cooking instrument Temperature detecting part 22 detected by temperature situation about changing.In this case, it is believed that detect the temperature of temperature change The possibility that cooking-vessel 1 is placed with degree test section 22 is high.
Accordingly it is desirable to cooked for the heating coil 3 around the temperature detecting part 22 for detecting temperature change The detection work of container 1.
On the other hand, even if the heating coil 3 for surrounding the temperature detecting part 22 for detecting temperature change does not change And cooking-vessel 1 can not be detected thereon, it is also possible to cooking-vessel 1 be present on the heating coil 3 around it.Therefore, Can also for the left and right adjacent with the heating coil 3 around the temperature detecting part 22 for detecting temperature change, up and down Heating coil 3 carries out the detection work of cooking-vessel 1.
That is, the detection work for carrying out cooking-vessel 1 with 5 heating coils 3 of Fig. 7 (a) dotted line. Thereby, it is possible to correctly detect out size and the mounting position of cooking-vessel 1.
In addition, in the case of considering in extension possibility, can also be as Fig. 7 (b) for detecting temperature change The heating coil 3 of tilted direction of temperature detecting part 22 also carry out the detection work of cooking-vessel 1, for the 9 of dotted line Individual heating coil 3 carries out the detection work of cooking-vessel 1.
Next, using Fig. 8, the situation that temperature change occurs in multiple temperature detecting parts 22 is illustrated.Fig. 8 (a) It is that the progress when temperature detecting part 22 of the induction heating apparatus in embodiment 2 is configured in the center of heating coil 3 is shown The figure of the scope of the detection work of cooking-vessel 1.Fig. 8 (b) is the temperature detection for showing the induction heating apparatus in embodiment 2 The figure of the scope of the detection work for carrying out cooking-vessel 1 when portion 22 is configured in the center of heating coil 3.In fig. 8 only Illustrating hypothesis, there occurs the temperature detecting part 22 of temperature change.
As noted previously, as loaded on the heating coil 3 around the temperature detecting part 22 there occurs temperature change There is the possibility of cooking-vessel 1 high, therefore, the detection work of cooking-vessel 1 is carried out for these heating coils 3.
In addition, placing the possibility of cooking-vessel 1 on adjacent heating coil 3, there is also therefore also comprising this is adjacent Scope and carry out the detection work of cooking-vessel 1.In this case, for 12 of the part with dotted line of Fig. 8 (a) Heating coil 3 carries out the detection work of cooking-vessel 1.
In addition, in the case of considering in extension possibility, the such portions with dotted line of Fig. 8 (b) can also be directed to 16 heating coils 3 divided carry out the detection work of cooking-vessel 1.
So, due to locking, there occurs the heating coil 3 near the temperature detecting part 22 of temperature change to carry out cooking-vessel 1 Detection work, therefore can exclude relay it is durable the problem of and power consumption increase problem.
In addition, detecting the mounting of cooking-vessel 1 according to temperature change, the heating coil of pending detection work is limited 3 quantity, thus, it is possible to quickly complete detection work.
Next, to temperature detecting part 22 to be configured to Fig. 9 (a) and (b) in 3 mutual approximate centre of heating coil Illustrate.Fig. 9 (a) is that the temperature detecting part 22 for showing the induction heating apparatus in embodiment 2 is configured in adjacent add The figure of the scope of the detection work of progress cooking-vessel 1 during 3 mutual approximate centre of heat coil.Fig. 9 (b) is to show embodiment party When the temperature detecting part 22 of induction heating apparatus in formula 2 is configured in 3 mutual approximate centre of heating coil cook The figure of the scope of the detection work of container 1.
In this case, think also according to temperature detecting part 22 is configured into the identical in the approximate centre of heating coil 3 Method, to determine to carry out the scope of the detection work of cooking-vessel 1.Become for example, temperature occurs in a temperature detecting part 22 In the case of change, as shown in Fig. 9 (a), as long as the adding there occurs temperature change a temperature detecting part 22 comprising encirclement 4 heating coils 3 in dotted line including heat coil 3 carry out the detection work of cooking-vessel 1.In addition, in multiple temperature In test section 22, such as 4 temperature detecting parts 22 occur temperature change in the case of, as shown in Fig. 9 (b), as long as be directed to comprising Surround that there occurs the heating coil 3 in the dotted line including the heating coil 3 of the 4 of temperature change temperature detecting part 22 to be cooked The detection work of container 1.
(embodiment 3)
Below, the induction heating apparatus of embodiment 3 is illustrated.In the induction heating apparatus of embodiment 3, with The difference of the induction heating apparatus of foregoing embodiment 1 is, the detection work of cooking-vessel 1 is carried out every the fixed cycle Make.
In embodiment 1, following content is illustrated：Because only in temperature detecting part 22, there occurs the feelings of temperature change It is high that the possibility of cooking-vessel 1 is placed with condition, therefore is directed to the detection work that these heating coils 3 carry out cooking-vessel 1, by This obtains reduction of power consumption and other effects.
However, this is only in the case of the temperature difference detected by temperature and the temperature detecting part 22 of cooking-vessel 1 Play effect.
That is, in the case of the temperature of cooking-vessel 1 and the detection temperature identical of temperature detecting part 22, due to not having There is generation temperature change, therefore, without the detection work of cooking-vessel 1.Due to without detecting work, therefore, operating Also the mark that cooking-vessel 1 is placed with for expression is occurred without in portion 6.Therefore, generation can not heat the problem of cooking-vessel 1.
It can not be detected if there is no cooking-vessel 1 and the certain different evidence of temperature that temperature detecting part 22 detects Go out cooking-vessel 1, then user needs to change the temperature of cooking-vessel 1 using some means, and then turns into ease of use Excessively poor induction heating cooking instrument.
In order to avoid such situation, in embodiment 3, with the detection work of the cooking-vessel 1 illustrated in embodiment 1 Make the detection work that the moment differently, every fixed cycle carries out cooking-vessel 1, thus avoid such situation.
However, the detection work due to continually carrying out cooking-vessel 1 can produce relay it is durable the problem of and reduction The reducing effect of power consumption, it is therefore desirable to which it is Min. to make the frequency.For example, as detection cycle, according to the number of heating coil 3 Time that amount, the detection work of cooking-vessel 1 are spent, commercial specification etc. determine, as long as but being for example every 5 seconds Can.
(embodiment 4)
The induction heating apparatus of embodiment 4 is illustrated below.In the induction heating apparatus of embodiment 4, with The difference of the induction heating apparatus of foregoing embodiment 1 is that temperature detecting part 22 employs infrared ray sensor.
In embodiment 3, in the case of the temperature of cooking-vessel 1 and the detection temperature identical of temperature detecting part 22 Problem points are illustrated.In addition, in the case where forming temperature detecting part 22 by thermistor, also in the presence of following problem：By Make it that generation time is stagnant untill mounting cooking-vessel 1 to the detection temperature of temperature detecting part 22 changes in the thermal capacity of top plate 2 Afterwards.
In order to solve these problems, temperature detecting part 22 is effective using infrared ray sensor.Infrared ray sensor is straight Receive the infrared ray radiated from cooking-vessel 1, therefore, response is more more excellent than thermistor.
Therefore, because mounting cooking-vessel 1 and the detection temperature of temperature detecting part 22 changes immediately, therefore can stand It is transferred to the detection work of cooking-vessel 1.Thus, go out as a result, it is possible to shorten from mounting cooking-vessel 1 to operating portion 6 The current time untill the mark 8 of cooking-vessel 1 is represented.
Further, since infrared ray sensor needs to receive the infrared ray radiated from cooking-vessel 1, therefore, it is however generally that, close In the printing implemented on top plate 2, printing is changed for receiving the view sections of infrared ray of infrared ray sensor, makes infrared ray Readily penetrate through.On the contrary, for the part beyond the visual field of the light of infrared ray sensor, the preferably material by being not through infrared ray To form.
In such a configuration, generally, it is not placed in the situation of the view sections of infrared ray sensor in cooking-vessel 1 Under, the infrared ray that sunshine or illumination etc. are included enters infrared ray sensor, is calculated according to the output of infrared ray sensor The temperature gone out is higher than original temperature.
When cooking-vessel 1 being positioned in into the view sections of infrared ray sensor in such a state, sunshine or illumination Deng light it is shielded, and infrared ray sensor will not receive the infrared ray that sunshine or illumination etc. are included, infrared ray sensor The infrared ray that the infrared ray of receiving only radiates from cooking-vessel 1, and then it is capable of detecting when the temperature of cooking-vessel 1.
That is, the interference light of sunshine or illumination etc. enters light state according to whether loading cooking-vessel 1 and changing, Therefore, as long as disturbing the detection work for entering to carry out cooking-vessel 1 in the case that light state changes of light.
Although very rare situation, sunshine or illumination etc. interference light infrared energy with from the cooking The equivalent situation of infrared energy or there is no the infrared ray for disturbing light of sunshine or illumination etc. completely that container 1 radiates In the case of the amount for the detection temperature that energy and the infrared energy radiated from cooking-vessel 1 are comparable to temperature detecting part 22, The light energy that infrared ray sensor receives does not change, and can not be transferred to the detection work of cooking-vessel 1.
So as to which even if temperature detecting part 22 is infrared ray sensor, what is illustrated in embodiment 3 is carried out every the fixed cycle The detection work of cooking-vessel 1 is also effective.
(embodiment 5)
The induction heating apparatus of embodiment 5 is illustrated below.In the induction heating apparatus of embodiment 5, with The difference of the induction heating apparatus of foregoing embodiment 1 is that detection assisted parts 21 is employed for detecting electrostatic capacitance Change electrode 11 and electrostatic capacitance test section 12.
When Figure 10 shows to be made up of the detection assisted parts of the induction heating apparatus in embodiment 5 electrostatic capacitance test section 12 Block diagram.
Arranged at the back side of top plate 2 by coating or bonding etc. to be formed as the electrode 11 of electric conductor, utilize electrostatic Detect the electricity formed as the cooking-vessel 1 of electric conductor by being loaded on electrode 11 and opposed top plate 2 in capacitance detecting portion 12 The electrostatic capacitance change of container.The electrostatic capacitance test section 12 independently works with cooking-vessel test section 5, due to need not be after The switching of electrical equipment etc., therefore the change of electrostatic capacitance can be detected all the time.
For the insulant needed for the formation of capacitor, due to being generally in the shape without any object on top plate 2 State, therefore, air play a part of the insulant.But other materials exist in cooking-vessel 1, finger, water, cooked etc. When on top plate 2, because respective dielectric constant is different from air, electrostatic capacitance changes.Examined by electrostatic capacitance test section 12 Measure the change of the electrostatic capacitance.Electrostatic capacitance test section 12 carrys out change for being transformed into DC voltage of electrostatic capacitance etc. Situation about being detected is more, but not limited to this.
In the case of the method for the change of detection electrostatic capacitance, because what the article beyond cooking-vessel for example drenched smears Cloth etc., also cause the change that electrostatic capacitance occurs, therefore, even if electrostatic capacitance change, may not also be placed with cooking-vessel 1.
In the presence of the problem for carrying out error detection during using such method to carry out the detection of cooking-vessel 1.Therefore, this hair Bright induction heating cooking instrument is opportunity when carrying out the following method as the detection means of maximally effective cooking-vessel 1, should Method is：Higher high-frequency electric current when being flowed through in heating coil 3 than being heated, according to heating coil current now Value determines whether to be placed with load.Thus, detection work is carried out only for the heating coil 3 that may be placed with cooking-vessel 1 Make, therefore can shorten from the time being placed on untill being detected, and can exclude due to repeating unwanted inspection Survey work and caused relay it is durable the problem of and power consumption increase problem.It is thus, it is possible to good as ease of use Induction heating cooking instrument.
(embodiment 6)
The induction heating apparatus of embodiment 6 is illustrated below.In the induction heating apparatus of embodiment 6, with The difference of the induction heating apparatus of foregoing embodiment 5 is, electrode is configured in couples near each heating coil.
In embodiment 5, illustrate only in the case where electrostatic capacitance test section 12 is there occurs electrostatic capacitance change Carry out the detection work, the reduction thus, it is possible to obtain power consumption and other effects of cooking-vessel 1.
Electrode 11 of the accuracy of detection of cooking-vessel 1 according to required for how configuring the detection of electrostatic capacitance and become Change.
The induction heating cooking instrument of the invention of multiple heating coils is closely being configured with rectangular, it is necessary to is detected Cooking-vessel 1 whether is placed with each heating coil 3, and can detection be operated heating coil 3.
So as to which preferably the electrode 11 required for the detection of heating coil 3 and electrostatic capacitance be matched somebody with somebody in couples as shown in Figure 11 Put.Figure 11 is to be made up of for a heating coil 33 electrode 11a, electrode 11b, electrode 11c needed for the detection of electrostatic capacitance The figure for the electrode 11 wanted, but it is not limited to 3.
So, by configuring electrode 11 around heating coil 3, the detection of cooking-vessel 1 is aided in, can quickly and just Really detect cooking-vessel 1.
(embodiment 7)
The induction heating apparatus of embodiment 7 is illustrated below.It is and preceding in the induction heating apparatus of embodiment 7 The difference of the induction heating apparatus for the embodiment 6 stated is that electrode 11 is configured between adjacent multiple heating coils Center position.
In embodiment 6, illustrate to configure the induction heating cooking instrument of electrode in couples with each heating coil.So Structure induction heating cooking instrument in, there is following problem：The detection of cooking-vessel 1 is very fast, on the other hand, the number of electrode 11 Amount increases and structure becomes complicated.
Thus, in present embodiment 7, as shown in figure 12, adjacent multiple heating coils 3 each other (heating coil 3a, Heating coil 3b, heating coil 3c, heating coil 3d) approximate centre position, required for configuring the detection of electrostatic capacitance Electrode 11, the quantity thus, it is possible to reduce electrode 11, and then the structure of equipment can be simplified to make price reduction.
In the case of the change there occurs electrostatic capacitance, such as the explanation in embodiment 2, for there occurs electrostatic capacitance Change position around heating coil 3, carry out cooking-vessel 1 detection work, thus, it is possible to quickly and correctly examine Measure cooking-vessel 1.
(embodiment 8)
The induction heating apparatus of embodiment 8 is illustrated below.In the induction heating apparatus of embodiment 8, with The difference of the induction heating apparatus of foregoing embodiment 1 is that detection assisted parts 21 is employed for detecting shaking for top plate 2 Dynamic vibration detecting part 13.
In embodiment 8, Figure 13 is that the sensing when detection assisted parts of embodiment 8 is made up of vibration detecting part 13 adds The block diagram of thermal.Caused vibrate is propagated to top plate 2 on cooking-vessel 1.Vibration of the vibration detecting part 13 to the top plate 2 is entered Row detection.
Vibration detecting part 13 is preferably configured as the rear-face contact with top plate 2.Alternatively, it is also possible to be configured to：Improve top plate 2 with The adhesion of vibration detecting part 13, vibration detecting part 13 is further pressed against into top plate 2 using spring etc..
Further, since as long as vibration detecting part 13 is capable of detecting when the vibration of top plate 2, thus, for example even if will shake Dynamic test section 13 is configured in the heating coil 3 contacted with top plate 2, is also capable of detecting when the vibration of top plate 2.Thereby, it is possible to simplification The structure of equipment.
However, in this case, because the detection level of vibration reduces, it is therefore desirable to further carried out using amplifier etc. Amplification, and then there is a possibility that SN than variation, as long as but be capable of detecting when the vibration of top plate 2, any structure can.
Vibration detecting part 13 is more using the situation of piezoelectric element etc., but is not limited to this.Vibration detecting part 13 is connected to Heating control section 4, according to caused vibration on top plate 2, heating control section 4 is capable of detecting when whether cooking-vessel may be placed with 1.So as to which heating control section 4 indicates that cooking-vessel test section 5 proceeds by detection work, is capable of detecting when cooking-vessel 1.
Caused vibration is not limited to load the situation of cooking-vessel 1 on top plate 2, but with cooking-vessel must be carried out all the time The existing method of 1 detection work is compared, and can significantly decrease its number, therefore can be excluded due to repeating not needing Detection work and caused relay it is durable the problem of and power consumption increase problem, and then can turn into ease of use it is good Good induction heating cooking instrument.
Can also according to the vibrational waveform of vibration detecting part 13, during based on mounting cooking-vessel 1 and in addition when The pattern of vibrational waveform, discriminate whether to be placed with the vibrational waveform of cooking-vessel 1, only be determined as being placed with cooking-vessel When 1, the detection work of cooking-vessel 1 is carried out.Further reduction thereby, it is possible to realize power consumption etc..
(embodiment 9)
The induction heating apparatus of embodiment 9 is illustrated below.In the induction heating apparatus of embodiment 9, with The difference of the induction heating apparatus of foregoing embodiment 8 is, sets multiple vibration detecting parts 13 for being used to detect vibration, Using location estimation portion 14, the location estimation portion 14 estimates the position of vibration source according to the phase difference of the vibrational waveform.
In embodiment 9, Figure 14 is the position that vibration source is estimated according to multiple vibration detecting parts 13 of embodiment 9 In the case of induction heating apparatus block diagram.
Multiple vibration detecting parts 13 for being used to detect the vibration of top plate 2 are set.Multiple vibration detecting parts 13 are configured to pair The vibration of the top plate 2 for the position being separated by is detected, the position thus, it is possible to easily estimate vibration source.
Vibrational waveform as the output of each vibration detecting part 13 is sent to location estimation portion 14.Examined according to each vibration The phase difference of the vibrational waveform in survey portion 13 and the position relationship of vibration detecting part 13, location estimation portion 14 estimate the position of vibration source Put.
For example, in the case of in the absence of phase difference, it is known that be separated by equidistant position with each vibration detecting part 13 On be placed with cooking-vessel 1, as long as therefore for carrying out the detection work of cooking-vessel 1 with the heating coil 3 of the position correspondence .
In addition, according to the Vibration propagation speed of top plate 2 and the relation of phase difference, estimation is separated by with each vibration detecting part 13 Distance, as long as therefore for equivalent to meet these position heating coil 3 carry out cooking-vessel 1 detection work i.e. Can.
Further, location estimation portion 14 can also be with heating control section 4 or the identical unit of cooking-vessel test section 5, lead to Home computer, DSP, customization IC etc. are crossed to realize that the situation in location estimation portion 14 is more, but not limited to this.
(embodiment 10)
The induction heating apparatus of embodiment 10 is illustrated below.In the induction heating apparatus of embodiment 10, It is with the difference of the induction heating apparatus of foregoing embodiment 1, detection assisted parts 21 employs illuminating part 15, light accepting part 16 and distance estimations portion 17, the distance estimations portion 17 is according to the light quantity received from light accepting part 16, and estimation is with being located at light accepting part 16 On the distance between object.
In embodiment 10, in the case that Figure 15 is the detection assisted parts that embodiment 10 is made up of distance estimations portion 17 Induction heating apparatus block diagram.
The upper surface of illuminating part 15 towards top plate 2 sends light, can be visible ray or is infrared light.Illuminating part 15 Distance estimations portion 17 or heating control section 4 are connected to, is lighted when there is luminous instruction.
The light that illuminating part 15 is sent is reflected on some objects, and light accepting part 16 receives the light after the reflection.Therefore, by The light reception sensitivity wavelength in light portion 16 must be contained in the emission wavelength of illuminating part 15.Light accepting part 16 exports the light with receiving Energy exports accordingly, and the output is sent to distance estimations portion 17.
The situation that the light sent according to illuminating part 15 is reflected on object and received by light accepting part 16 with which kind of degree, away from From the distance between the estimation of estimator 17 and object.The estimation of distance includes triangulation mode etc., but not limited to this.
Result estimated by distance estimations portion 17 is sent to heating control section 4, is being judged as being placed with the feelings of cooking-vessel 1 Under condition, the detection work of cooking-vessel 1 is carried out for corresponding heating coil 3.Detected thereby, it is possible to shorten from being placed on Untill time, and can exclude due to repeat it is unwanted detection work and caused relay it is durable the problem of With the problem of the increase of power consumption.Thus, it is possible to as the good induction heating cooking instrument of ease of use.
Further, distance estimations portion 17 can also be with heating control section 4 or the identical unit of cooking-vessel test section 5, lead to Home computer, DSP, customization IC etc. are crossed to realize that the situation in distance estimations portion 17 is more, but not limited to this.
In the present embodiment 10 formed as described above, by heating coil be adjacent to configuration it is multiple and in any position Put in the induction heating apparatus that mounting cooking-vessel can be heated, only carry out cooking-vessel detection work when necessary Make.Thereby, it is possible to reduce power consumption, and the durability of the relay as switching part can be improved, be cooked in user's mounting During capacity transfer device, heating work can be carried out using operating portion immediately.Thus, it is possible to realize the good sensing heating of ease of use Device.
(embodiment 11)
Figure 16 is the state for the cooking-vessel 1 for schematically showing the induction heating apparatus being placed with embodiment 11 Block diagram, the state for being placed with cooking-vessel 1 is shown in built-in induction heating cooking instrument.
In the present invention, improved by test position determination section 23 positioned at the high position of the possibility of mounting cooking-vessel 1 On heating coil 3 detection work frequency.That is, corresponding heating coil 3 is directed to continually by cooking-vessel test section 5 Carry out detection work.On the other hand, reduced for the heating coil 3 on the low position of the possibility positioned at mounting cooking-vessel 1 Detect the frequency of work.Thereby, it is possible to realize the reduction of power consumption, relay durability raising.
Test position determination section 23 is connected to heating control section 4 and cooking-vessel test section 5.According to from heating control section 4 information, the decision of test position determination section 23 detect the heating coil 3 of work, cooking-vessel test section 5 is performed the cooking The detection work of container 1.The testing result of cooking-vessel test section 5 is sent to test position determination section 23, and then test position Determination section 23 sends testing result to heating control section 4.According to the testing result, heating control section 4 carries out such judgement：It is right The content being shown on operating portion 6 is updated, or carries out detection work of cooking-vessel 1 etc. again.
Here, illustrate that cooking-vessel test section 5 is connected via test position determination section 23 with heating control section 4, still Cooking-vessel test section 5 and test position determination section 23 directly can also be connected with heating control section 4.In addition, used by individual Computer, DSP, IC etc. is customized to realize that the situation of test position determination section 23 is more, but not limited to this, heating control section 4, cook Capacity transfer device test section 5, all or part of function of test position determination section 23 can also be made up of same unit.
The high heating coil 3 of possibility for loading cooking-vessel 1, test position determination section 23 is by cooking-vessel 1 Detection frequency is set to height, and the low heating coil 3 of the possibility for loading cooking-vessel 1, test position determination section 23 will be cooked The detection frequency of capacity transfer device 1 is set to low.Thus, cooking-vessel test section 5 with high frequency carry out load cooking-vessel 1 can The detection work of the cooking-vessel 1 of the high heating coil 3 of energy property, the possibility for low frequency load cooking-vessel 1 are low Heating coil 3 cooking-vessel 1 detection work.Thereby, it is possible to shorten detect cooking-vessel 1 untill spent when Between, and the detection work times of cooking-vessel 1 can be reduced.Thus, required for the detection work of cooking-vessel 1 is suppressed The consumption of power and in the case of switching structure as inverter circuit 7 and heating coil 3 using relay, it is possible to increase after The durability of electrical equipment.
Here, the frequency for detect work is illustrated.Cooked for all heating coils 3 with identical frequency In the case of the detection work of capacity transfer device 1, for example, being set to carry out 1 detection work every 3 seconds.On the other hand, for by detecting Position determination section 23 is judged as the high heating coil 3 of the possibility for loading cooking-vessel 1, is set to carry out 1 detection work every 1 second Make.On the other hand, for being judged as the low heating coil 3 of the possibility for loading cooking-vessel 1 by test position determination section 23, if To carry out 1 detection work every 5 seconds.While thereby, it is possible to detect cooking-vessel 1 as early as possible, power consumption is reduced.In addition, it is Reduction power consumption, for being judged as the low heating coil 3 of the possibility for loading cooking-vessel 1 by test position determination section 23, Detection work can be made to stop (detection frequency is equivalent to zero).
(embodiment 12)
The induction heating apparatus of embodiment 12 is illustrated below.In the induction heating apparatus of embodiment 12, It is with the difference of the induction heating apparatus of foregoing embodiment 11, test position determination section 23 is by multiple heating coils 3 In heating coil 3 of the configuration on the position in most peripheral portion detection frequency be set to than most peripheral portion beyond heating coil 3 detection frequency is low.
First, the heating coil 3 in most peripheral portion is illustrated.Figure 17 (a) and (b) are shown in embodiment 12 The figure of the configuration of the heating coil of induction heating apparatus.Figure 17 (a) is not configure the situation of heating coil 3 on the side of operating portion 6, Figure 17 (b) is to also provided the situation of heating coil 3 on the side of operating portion 6.
The heating coil 3 in most peripheral portion refers to, with the heating at the hatched example areas of dotted line in Figure 17 (a), Figure 17 (b) Coil 3, in Figure 17 (a), corresponding heating coil is 24, and corresponding heating coil is 26 in Figure 17 (b).
Figure 18 (a) is the example that cooking-vessel 1 has only been loaded on the heating coil 3 positioned at these most peripheral portions.Figure 18 (a), Figure 18 (b) are the configurations of the heating coil 3 and cooking-vessel 1 that show the induction heating apparatus in embodiment 12 Figure.
In the case where having loaded cooking-vessel 1 shown in such as Figure 18 (a), cooking-vessel 1 exposes from induction heating apparatus, And there was only 2 heating coils 3 in the underface of cooking-vessel 1, therefore, cook and spend the time.
So as to, it will not generally be arranged so that, and the side of multiple heating coils 3 with underface as shown in Figure 18 (b) be present The situation that formula is loaded is more.In this case, the top of the heating coil 3d beyond most peripheral portion is also placed with the cooking Container 1.Heating coil 3d carries out the inspection of cooking-vessel 1 with the common cycle (being 3 second cycle in the example of embodiment 11) Work is surveyed, and then cooking-vessel 1 is detected first to heating coil 3d.Thus, by further directed to around it, that is The heating coil 3 adjacent with heating coil 3d carries out the detection work of cooking-vessel 1, is capable of detecting when the correct of cooking-vessel 1 Positions and dimensions.
So, because the possibility that cooking-vessel 1 is only loaded on the heating coil 3 in most peripheral portion is low, therefore even if The frequency of the detection work of the progress cooking-vessel 1 of the heating coil 3 in most peripheral portion is reduced, is also asked in terms of practicality without what Topic.
But there is also 1 less situation of cooking-vessel etc., so if make the heating coil 3 in most peripheral portion completely The detection work of cooking-vessel 1 stops (detection frequency is equivalent to zero), then the problem of occurring that cooking-vessel 1 can not be detected, So as to need to consider these situations to determine the detection cycle of the cooking-vessel 1 of the heating coil 3 in most peripheral portion (or as reciprocal Detection frequency).
(embodiment 13)
The induction heating apparatus of embodiment 13 is illustrated below.In the induction heating apparatus of embodiment 13, It is with the difference of the induction heating apparatus of foregoing embodiment 11, is detected for a heating coil 3 thereon In the case that side is placed with cooking-vessel 1, the inspection of cooking-vessel 1 is also carried out for the heating coil 3 adjacent with the heating coil 3 Survey work.Thereby, it is possible to detect the correct positions and dimensions of cooking-vessel 1.
In the case where detecting to be placed with cooking-vessel 1 above it for a heating coil 3, even in adjacent When being set in heating coil 3 in the presence of the frequency for carrying out detection work than other 3 lower heating coils 3 of heating coil, The detection work that the adjacent heating coil 3 carries out cooking-vessel 1 at once can be directed to.In addition, for carrying out detecting work Frequency is set to the heating coil 3 lower than other heating coils 3, can also be set as improving the inspection for carrying out cooking-vessel 1 Survey the priority of work.In this case, both can only improve priority, or can also improve priority and Also improve detection frequency.
Such as the explanation in embodiment 12, such as by heating coil 3e, 3f, 3g, 3h, the 3i in most peripheral portion cook The frequency of the detection work of container 1 is set to low.
Here, consider to detect to be placed with the situation of cooking-vessel 1 above it for heating coil 3d.In the situation Under, it may also be placed with cooking-vessel 1 on adjacent heating coil 3e, 3f, 3g, 3h, the 3i (Figure 18 (b)).On the other hand, As described above, heating coil 3e, 3f, 3g, 3h, the 3i in the most peripheral portion in the adjacent heating coil detection frequency are set Obtain low.
But in the case where detecting to be placed with cooking-vessel 1 above it for heating coil 3d, even in adjacent Heating coil 3 in comprising detection frequency be set low heating coil 3e, 3f, 3g, 3h, 3i in the case of, due at this Also it is high that the possibility of cooking-vessel 1 is placed with a little heating coil 3e, 3f, 3g, 3h, 3i, therefore, carries out the inspection of cooking-vessel 1 Survey work.Thereby, it is possible to detect the correct positions and dimensions of cooking-vessel 1.
(embodiment 14)
The induction heating apparatus of embodiment 14 is illustrated below.In the induction heating apparatus of embodiment 14, with The difference of the induction heating apparatus of foregoing embodiment 11 is, according in a period of regulation cooking-vessel 1 loaded In the position of heating coil 3 and number, test position determination section 23 determines to carry out the inspection of cooking-vessel 1 for each heating coil 3 Survey the frequency of work.
Figure 19 (a) and (b) are the usage histories for the heating coil for showing the induction heating apparatus in embodiment 14 Figure.Figure 19 (a) is the figure for the address for showing heating coil 3.Figure 19 (b) is the use frequency for each heating coil 3 for showing Figure 19 (a) The figure of degree.Further, in Figure 19,9 heating coils 3 are only extracted, and are eliminated other.
Usage frequency shown in Figure 19 (b) is shown loads cooking-vessel 1 within defined period on each heating coil 3 Number.Here, defined period refers to, such as can be use in past one month or past 100 times Use, can also be from begin to use to last time use untill.In in during these, test position determination section 23 is sentenced It is scheduled on which position and uses often, for the heating coil 3 on the high position of usage frequency, will carries out detecting work Frequency is set to height, for the heating coil 3 on the low position of usage frequency, the frequency for carrying out detection work is set to low.
Specifically, for usage frequency high heating coil 3p, 3q, 3s, 3t, the frequency for detect work is set Must be high, for usage frequency low heating coil 3j, 3k, 3m, 3n, 3r, the frequency for carrying out detection work is set to low.This Sample, learnt according to past using virtual condition, thus will not exceedingly increase cooking-vessel 1 as induction heating apparatus Detection work number (detection frequency), cooking-vessel 1 can be detected as early as possible, and can also reduce detection work needed for The power consumption wanted.
(embodiment 15)
The induction heating apparatus of embodiment 15 is illustrated below.In the induction heating apparatus of embodiment 15, It is with the difference of the induction heating apparatus of foregoing embodiment 11, test position determination section 23 will be configured in operating portion 6 The detection frequency of the heating coil 3 of side is set to the detection frequency of the heating coil 3 than being disposed substantially away from the direction of operating portion 6 It is high.
The present invention is due to being the multi-thread coil structures that multiple heating coils 3 are equipped in the lower section of top plate 2, therefore cooking-vessel 1 can be positioned on any position.But easy-to-use position in reality be present and be not easy the position used.Such as It is following situation：In the case of having cooking table or sink on right side in the left side of induction heating apparatus for wall, relative to The center of induction heating apparatus, the frequency that right side is used uprise, the usage frequency step-down in left side.
Similarly, for close to the side of operating portion 6 and the side of remote operating portion 6, close to the side of operating portion 6 The usage frequency of heating coil is easier to uprise than the side of remote operating portion 6.It is thought that because：If in cooking-vessel 1 In be put into food materials and can then become heavy, therefore the tendency in front of being placed on be present.So as to for configuring adding in the side of operating portion 6 Heat coil 3, the frequency of the detection work of cooking-vessel 1 is set to the heater wire than being disposed substantially away from the direction of operating portion 6 Enclose 3 high, thus, can also reduce the power consumption needed for detection work on the whole.
(embodiment 16)
The induction heating apparatus of embodiment 16 is illustrated below.In the induction heating apparatus of embodiment 16, It is with the difference of the induction heating apparatus of foregoing embodiment 11, the heating coil 3 for carrying out heating work, The detection frequency for the heating coil 3 being disposed substantially away from the direction of operating portion 6 is set as than except this by test position determination section 23 The detection frequency of heating coil 3 in addition is low.
In the case of the cooking-vessel 1 during presence is heated, configure in the heater wire with carrying out heating work Circle 3 is compared to inner side, the heating coil 3 i.e. on the direction away from operating portion 6 is closer to, by the cooking-vessel 1 in heating Obstruction and be not easy to load cooking-vessel 1.As described above, because：It is heavier to be put into the cooking-vessel 1 of food materials, and The cooking-vessel 1 heated, which turns into, to be hindered, if accidentally touching the cooking-vessel 1 in heating, the anxiety for having scald.
So as to, relative to the heating coil 3 for carrying out heating work, opening position on the direction away from operating portion 6 The possibility that heating coil 3 is used is extremely low.So as to, for the heating coil 3, compared with the heating coil 3 of the side of operating portion 6, Reduce the number of detection work, reduce detection frequency, the consumption thus, it is possible to suppress power.
(embodiment 17)
The induction heating apparatus of embodiment 17 is illustrated below.In the induction heating apparatus of embodiment 17, It is with the difference of the induction heating apparatus of foregoing embodiment 11, test position determination section 23 will be with being heated The detection frequency of the adjacent heating coil 3 of the heating coil 3 of work is set to the detection frequency than heating coil 3 in addition It is low.
When wanting that cooking-vessel 1 is loaded on the adjacent heating coil 3 of the heating coil 3 with carrying out heating work In the case of, when cooking-vessel 1 is pot, it is not easy to be loaded by the obstruction of flange etc..
Further, since cooking-vessel 1 will not generally be touched and be heated, thus with the heating coil 3 in heating The possibility that cooking-vessel 1 is loaded on adjacent heating coil 3 is low.So as to for the heater wire with carrying out heating work 3 adjacent heating coils 3 are enclosed, the number of detection work is reduced, reduces detection frequency, the consumption thus, it is possible to suppress power.
For the detection frequency of the heating coil 3 as object, it is set to reduce frequency compared with other heating coils 3, but Be they can also be set as it is lower than frequency before.That is, for the heater wire with carrying out heating work Enclose 3 adjacent heating coils 3, will detect frequency be set as than carry out heating work before detection frequency it is lower.
(embodiment 18)
The induction heating apparatus of embodiment 18 is illustrated below.In the induction heating apparatus of embodiment 18, It is with the difference of the induction heating apparatus of foregoing embodiment 11, when the heating coil 3 to carrying out heating work The controlling value of heating control section 4 that is controlled of high frequency electric cataclysm occurs in the case of, test position determination section 23 will be with The detection frequency for carrying out the adjacent heating coil 3 of heating coil 3 of heating work is set as than heater wire in addition The detection frequency of circle 3 is higher.
In the case of the cooking-vessel 1 in moving heating, heating control section 4 is intended for giving this identical work(before , it is necessary to change the controlling value of the switch elements such as the IGBT for forming inverter circuit 7 during rate.
Specifically, in the case of the cooking-vessel 1 in moving heating, power is controlled in the frequency according to switch When, it is necessary to frequency is reduced, when using conduction ratio to control power, it is necessary to improve conduction ratio.On the other hand, cooked not mobile In the case of container 1, these controlling values are constant or slowly change only occurs.
On the contrary, in the case where moving cooking-vessel, cataclysm occurs for controlling value.So as to which cataclysm occur in controlling value In the case of, the possibility for moving cooking-vessel 1 is high.Then, cooking-vessel 1 is moved to and the phase of heating coil 3 in heating The possibility loaded on adjacent heating coil 3 is high.So as to detect frequency by improving, cooking-vessel 1 can be detected as early as possible.
For the detection frequency of the heating coil 3 as object, it is set to improve frequency compared with other heating coils 3, but Be they can also be set as it is higher than frequency before.That is, in the heating coil 3 to carrying out heating work The controlling value of heating control section 4 that is controlled of high frequency electric there occurs cataclysm in the case of, for being heated The adjacent heating coil 3 of the heating coil 3 of work, frequency can also be set as than the frequency for detect work before more It is high.
(embodiment 19)
The induction heating apparatus of embodiment 19 is illustrated below.In the induction heating apparatus of embodiment 19, It is that there is electric power source operation portion 24, the electric power source operation portion 24 with the difference of the induction heating apparatus of foregoing embodiment 11 Allow hand over whether to the grade of operating portion 6 supply power supply, electric power source operation portion 24 is operated from user and as to operation In the case that the state of the grade supply power supply of portion 6 have passed through the defined time, each heating will be carried out by test position determination section 23 The frequency of the detection work of coil 3 reduces or is set as zero (equivalent to the stopping of detection work).
Electric power source operation portion 24 is used to switch supplies power supply to the unit of the composition induction heating apparatus of the grade of operating portion 6, is institute The power switch of meaning.When user operates electric power source operation portion 24 and turns into the state of supply power supply, repeat to cook The detection work of capacity transfer device 1, but user carries out other cooking operations etc. and does not slowly load cooking-vessel 1 sometimes.Due to The detection work of cooking-vessel 1 is also carried out during this period, therefore can unnecessarily consume power.Thus, grasped to power supply Make portion 24 to be operated and be initially supplied power supply and rise and have passed through in the case that the stipulated time do not load cooking-vessel 1 yet, reduce into The frequency of the detection work of row cooking-vessel 1, the consumption thus, it is possible to suppress power.
In the present embodiment 11~19 formed as described above, by heating coil 3 be adjacent to configuration it is multiple and Loaded on any position in the induction heating apparatus that cooking-vessel 1 can also be heated, the possibility for loading cooking-vessel 1 Property high position on the heating coil 3 that configures, the frequency for detect work is set to height.Hold on the contrary, being cooked for mounting The low heating coil 3 of the possibility of device 1, the frequency for detect work is set to low.Thereby, it is possible to reduce power consumption, and The durability of the relay as switching part can be improved.Thus, it is possible to realize user load cooking-vessel 1 when can The good induction heating apparatus of the ease of use of the progress heating work of operating portion 6 is utilized immediately.
(embodiment 20)
Figure 20 is to schematically show to be placed with the cooking on the induction heating apparatus in embodiments of the present invention 20 The block diagram of the state of container 1.Figure 20 shows the state that cooking-vessel 1 is placed with built-in induction heating cooking instrument.
In the present invention, work determination section 31 is detected continually to carry out when the possibility for loading cooking-vessel 1 is high The detection work of cooking-vessel 1, the detection work for carrying out cooking-vessel 1 is reduced when the possibility for loading cooking-vessel 1 is low The frequency of work.Thereby, it is possible to realize the reduction of power consumption, relay durability raising.
Detection work determination section 31 is connected to heating control section 4 and cooking-vessel test section 5.According to from heating control section 4 information, detection work determination section 31 determine to carry out the cycle (or its inverse i.e. detection frequency) of the detection work of cooking-vessel 1 Deng, make cooking-vessel test section 5 perform cooking-vessel 1 detection work.
The testing result of cooking-vessel test section 5 is sent to detection work determination section 31, and then detects work determination section 31 Testing result is sent to heating control section 4.According to the testing result, heating control section 4 makes the following judgment：To being shown in operation Content in portion 6 is updated, or carries out the detection work of cooking-vessel 1 again.
Here, illustrate that cooking-vessel test section 5 is connected via detection work determination section 31 with heating control section 4, but It is that cooking-vessel test section 5 and detection work determination section 31 directly can also be connected with heating control section 4.
In addition, realize that the situation of detection work determination section 31 is more by home computer, DSP, customization IC etc., but Not limited to this, heating control section 4, cooking-vessel test section 5, detection work determination section 31 all or part of function can also It is made up of same unit.
Work determination section 31 is detected to mounting cooking-vessel 1 or changes the high situation of possibility for loading position and low feelings Condition is judged.In the case of the possibility height of mounting cooking-vessel 1, the detection work or contracting of cooking-vessel 1 are carried out immediately It is short detection work the execution cycle, i.e. improve detect frequency, thus, it is possible to shorten detect cooking-vessel 1 untill spent when Between.
On the other hand, mounting cooking-vessel 1 possibility it is low in the case of, extend detection work the execution cycle or Stop detection work, thus, it is possible to realize the reduction of power consumption, relay durability raising.Thereby, it is possible to as using just The good induction heating cooking instrument of profit.
(embodiment 21)
The induction heating apparatus of embodiment 21 is illustrated below.In the induction heating apparatus of embodiment 21, It is with the difference of the induction heating apparatus of foregoing embodiment 20, from user finally carries out operation to operating portion 6 In the case of have passed through the defined time, the frequency for the detection work for carrying out cooking-vessel 1 is dropped by detection work determination section 31 It is low or be set as zero (equivalent to stopping detecting work).
Generally, that power supply supply switching part (not shown) is more in induction heating cooking instrument be present.The power supply supplies To switching part be used for switch whether to induction heating cooking instrument each portion supply power supply.In the case where not supplying power supply, due to Power will not be consumed, therefore saves energy.
On the other hand, when wanting supply power supply, shown on operating portion 6, cooking-vessel test section 5 needs to repeat The work for detecting whether to be placed with cooking-vessel 1 is carried out, when not in use, power required for the detection work can be with Say it is to be unnecessarily consumed.Especially heating work terminate and user such as enter hold operation in the case of, sometimes Forget to operate power supply supply switching part and make the state for not supplying power supply.In this case, work is detected The portion 31 that makes decision thinks there is a possibility that and is used and carry out the detection work of cooking-vessel 1, causes unnecessarily to consume work( Rate.
In this case, user is not entered to operating portion 6 afterwards using the stopping instruction of the input heating of operating portion 6 Row operation.So as in the case where have passed through the defined time finally carrying out operation to operating portion 6 from user, be judged as It is not high that the possibility of heating work is carried out again, and detection work determination section 31 extends the execution cycle for detecting work and can reduced Power consumption.Or in the case where the possibility for carrying out heating work is extremely low, heating work can also be stopped.In this case, need To operate as follows：By being operable to restart the detection work of cooking-vessel 1 to operating portion 6 again, or pass through Power supply supply switching part temporarily ceases the supply of power supply, and supplies power supply again.
Here, execution cycle (the detection frequency that alteration detection work is played in operation is finally carried out to operating portion 6 from user Inverse) untill stipulated time be that should be determined according to ease of use of user etc., such as 5 minutes or so i.e. Can.In addition, for the frequency of detection work for carrying out cooking-vessel 1, if the usual time example that waits after power supply will be just switched on Such as be set to 3 second cycle, then without operation in the case of, be set to 10 second cycle etc., as long as longer than the usual time, any cycle all may be used With.The execution cycle of the detection work of cooking-vessel 1 is set into longer will make power consumption lower, on the other hand, carry out again In the case of heating, according to the difference on opportunity, the time is needed untill reflection display on operating portion 6, so as to be not easy to use.From And the detection work for entering to be about to cooking-vessel 1 returns to the setting in original cycle etc., as long as the use of user will not be made just The degree that profit is deteriorated.
(embodiment 22)
The induction heating apparatus of embodiment 22 is illustrated below.In the induction heating apparatus of embodiment 22, It is that there is the body detecting part detected to human body with the difference of the induction heating apparatus of foregoing embodiment 20 32, in the case where body detecting part 32 detects people, cooking-vessel test section 5 gets started the detection for carrying out cooking-vessel 1 Work.Thus, in the case where detecting people, the detection work of a cooking-vessel 1 can be at least carried out in early stage. That is in the case of the detection work of cooking-vessel 1 has been carried out, the detection of each heating coil 3 is included sometimes Blank time during work.Even if in this case, get started progress when body detecting part 32 detects people The detection work of cooking-vessel 1, therefore cooking-vessel 1 can be quickly detected from.
The detection work for substituting the cooking-vessel 1 carried out by cooking-vessel test section 5, or further, in people In the case that body test section 32 detects people, compared with not detecting the situation of people, detection work determination section 31 will be cooked The frequency of container detection work is set to height on the whole.
In fig. 20, if user is come in face of induction heating cooking instrument, body detecting part 32 detects the feelings Condition.Body detecting part 32 is more for example with the situation of the thermoelectric element of change for detecting infrared ray etc., but not limited to this.
Body detecting part 32 is connected to heating control section 4, and the testing result of body detecting part 32 is sent to detection work and determined Determine portion 31.In the case where detecting that user is located near induction heating cooking instrument by body detecting part 32, work is detected Determination section 31 can interpolate that as the possibility height followed by heating work.Thus, for example the explanation in such as embodiment 21, It is also that the frequency for carrying out cooking-vessel detection work is whole in the case of the frequency of detection work of cooking-vessel 1 is reduced Height is set on body.Thus, by carrying out the detection work of cooking-vessel 1 at least once with the short cycle, can detect as early as possible Cooking-vessel 1.In addition, in this case, it can also be directed to during fixing and detection frequency is set to height.
Do not carry out heating work immediately further, since fully taking into account, thus detect the instruction of work determination section 31 continue into The detection work of row cooking-vessel 1, cooking-vessel 1 can be detected as early as possible.
On the contrary, in the case where body detecting part 32 detects no user, held due to that will not load or move to cook Device 1, therefore the detection work of cooking-vessel 1 need not be carried out.So as to which in this case, cooking-vessel test section 5 stops The detection work of cooking-vessel 1.Thereby, it is possible to suppress the consumption of unnecessary power.In addition, by relay to inverter circuit 7 and heating coil 3 be attached the driving number that relay in the case of structure, is reduced as switching, it is possible to increase relay The durability of device.
Substitute the stopping of the detection work of the cooking-vessel 1 carried out by cooking-vessel test section 5, or further, detection The frequency for the detection work for carrying out cooking-vessel 1 can also be reduced or be set as zero (with detection work by work determination section 31 Stop corresponding).
It is multiple heating coil 3 is adjacent into configuration in the induction heating apparatus of the invention formed as described above And loaded on any position in the induction heating apparatus that cooking-vessel can also be heated, only it can carry out when necessary The detection work of cooking-vessel 1.Thereby, it is possible to reduce power consumption, and the durability of the relay as switching part is improved, made When user loads cooking-vessel 1, heating work can be carried out using operating portion 6 immediately.Thereby, it is possible to realize that ease of use is good Good induction heating apparatus.
Industrial applicability
As described above, the induction heating apparatus of the present invention has prompted have outstanding commodity value and reliability and safety High induction heating apparatus, in the purposes of the various equipment of the progress sensing heating such as induction heating cooking instrument effectively.
Label declaration
1：Cooking-vessel
2：Top plate
3、3a、3b、3c、3d、3e、3f、3g、3h、3i、3j、3k、3m、3n、3p、3q、3r、3s、3t：Heating coil
4：Heating control section
5：Cooking-vessel test section
6、6a、6b、6c：Operating portion
7：Inverter circuit
8：Mark
11、11a、11b、11c：Electrode
12：Electrostatic capacitance test section
13：Vibration detecting part
14：Location estimation portion
15：Illuminating part
16：Light accepting part
17：Distance estimations portion
20：Priority determination section
21：Detect assisted parts
22：Temperature detecting part
23：Test position determination section
24：Electric power source operation portion
31：Detect work determination section
32：Body detecting part

Claims (25)

1. a kind of induction heating apparatus,
The induction heating apparatus has：
Top plate, it loads the cooking-vessel of heating gratin；
Multiple heating coils, they closely configure and produce the magnetic field for heating the cooking-vessel；
Inverter circuit, it is powered to the heating coil；
Heating control section, it controls the inverter circuit being powered to each heating coil of the multiple heating coil, comes Control the heating power of the cooking-vessel；
Cooking-vessel test section, it carries out cooking-vessel detection work, and the cooking-vessel detection work is detection described each Whether the top of heating coil is placed with the cooking-vessel；
Operating portion, it shows the testing result of the cooking-vessel test section；And
Priority determination section, it is directed to each heating coil of the multiple heating coil, determines to be detected by the cooking-vessel Portion to whether being placed with the priority of heating coil when the cooking-vessel detects,
The cooking-vessel test section is according to the priority determined by the priority determination section, for each heater wire Whether circle is placed with the cooking-vessel detection work of the cooking-vessel above it,
The priority determination section includes detection assisted parts, being powered by the inverter circuit to the heating coil Before carrying out cooking-vessel detection work by the cooking-vessel test section, the detection assisted parts is to the object on the top plate Detected,
Whether the priority determination section is determined by the cooking-vessel test section to loading by the detection assisted parts The priority of heating coil when thering is the cooking-vessel to be detected,
In the case where detecting object by the detection assisted parts, by by the inverter circuit to the thing that detects Heating coil around body proceeds by energization, and the cooking-vessel test section is carried out around the object detected The top of the heating coil whether be placed with the detection work of cooking-vessel.
2. induction heating apparatus according to claim 1,
The detection assisted parts is made up of temperature detecting part, and the temperature detecting part detects the temperature of the object.
3. induction heating apparatus according to claim 2,
When detecting the temperature change of the object by the temperature detecting part, the cooking-vessel test section is only for position Cooking-vessel detection work is carried out in the heating coil of the near sites of the temperature change detected.
4. induction heating apparatus according to claim 2,
The cooking-vessel test section carries out cooking-vessel detection work every the fixed cycle.
5. induction heating apparatus according to claim 2,
The temperature detecting part is by the way of detection infrared ray is come measurement temperature.
6. induction heating apparatus according to claim 1,
The detection assisted parts is made up of electrode and electrostatic capacitance test section,
The electrode is disposed in the lower surface of the top plate,
The electrostatic capacitance test section detection is due to loading the object on the upper surface of the top plate and in the electrode The change of caused electrostatic capacitance.
7. induction heating apparatus according to claim 6,
The electrode configures near each heating coil in couples.
8. induction heating apparatus according to claim 6,
The electrode configuration is in the position of the adjacent mutual approximate centre of multiple heating coils.
9. induction heating apparatus according to claim 1,
The detection assisted parts is made up of the vibration detecting part for detecting the vibration of the top plate.
10. induction heating apparatus according to claim 9,
The induction heating apparatus is provided with multiple vibration detecting parts, also with location estimation portion, location estimation portion root The phase differences of the multiple vibrational waveforms detected according to the vibration detecting part estimates the position of vibration source.
11. induction heating apparatus according to claim 1,
It is described detection assisted parts be made up of illuminating part, light accepting part and distance estimations portion, the distance estimations portion according to described in by The light quantity that light portion receives is estimated and the distance between object of top positioned at the light accepting part.
12. a kind of induction heating apparatus, has：
Top plate, it loads the cooking-vessel of heating gratin；
Multiple heating coils, they closely configure and produce the magnetic field for heating the cooking-vessel；
Heating control section, it controls the high frequency electric passed through in each heating coil of the multiple heating coil, described to control The heating power of cooking-vessel；
Cooking-vessel test section, it carries out cooking-vessel detection work, and the cooking-vessel detection work is detection described each Whether the top of heating coil is placed with the cooking-vessel；
Operating portion, it shows the testing result of the cooking-vessel test section；And
Priority determination section, it is directed to each heating coil of the multiple heating coil, determines to be detected by the cooking-vessel Portion to whether being placed with the priority of heating coil when the cooking-vessel detects,
According to the priority determined by the priority determination section, the cooking-vessel test section is directed to each heater wire Whether circle is placed with the cooking-vessel detection work of the cooking-vessel above it,
The priority determination section includes test position determination section, and the test position determination section determines detection frequency, described Detection frequency is to be directed to each heating coil of the multiple heating coil with the cooking-vessel test section with which type of frequency Degree carries out the related detection frequency of cooking-vessel detection work.
13. induction heating apparatus according to claim 12,
Heating coil of the test position determination section by the configuration in the multiple heating coil on the position in most peripheral portion Detection frequency be set to it is lower than the detection frequency of the heating coil beyond the most peripheral portion.
14. induction heating apparatus according to claim 12,
In the case of detecting to be placed with cooking-vessel above a heating coil, the cooking-vessel test section is directed to The heating coil adjacent with the heating coil, also carry out cooking-vessel detection work.
15. induction heating apparatus according to claim 14,
Detection frequency even in the adjacent heating coil is set the feelings lower than the detection frequency of other heating coils Under condition, the cooking-vessel test section carries out cooking-vessel detection work at once also for the adjacent heating coil.
16. induction heating apparatus according to claim 12,
The test position determination section is according to the heating coil for being placed with the cooking-vessel detected in a period of regulation Position and number, set the detection frequency of each heating coil.
17. induction heating apparatus according to claim 12,
The test position determination section by configure the heating coil of the operating portion side detection frequency be set to than with The detection frequency for putting the heating coil on the direction away from the operating portion is high.
18. induction heating apparatus according to claim 12,
The test position determination section will be disposed substantially away from the operating portion relative to the heating coil for carrying out heating work Direction on heating coil detection frequency be set to than relative to carry out heating work the heating coil configure It is low in the detection frequency of the heating coil of the operating portion side.
19. induction heating apparatus according to claim 12,
The test position determination section is by the detection frequency of the heating coil adjacent with the heating coil for carrying out heating work It is set to lower than the detection frequency of heating coil in addition.
20. induction heating apparatus according to claim 12,
The heating control section that the high frequency electric passed through in the heating coil to carrying out heating work is controlled In the case that cataclysm occurs for controlling value, the test position determination section is by the heating coil phase with carrying out heating work The detection frequency of adjacent heating coil is set to higher than the detection frequency of heating coil in addition.
21. induction heating apparatus according to claim 12,
The induction heating apparatus also has electric power source operation portion, and whether the electric power source operation portion allows hand over supplies to the operating portion Power supply,
The electric power source operation portion is operated from user and as to the operating portion supply power supply state by In the case of the defined time, the test position determination section is directed to all the multiple heating coils, reduce on the whole Detection frequency is set as zero by detection frequency.
22. a kind of induction heating apparatus, has：
Top plate, it loads the cooking-vessel for heating gratin；
Multiple heating coils, they closely configure and produce the magnetic field for heating the cooking-vessel；
Heating control section, it controls the high frequency electric passed through in each heating coil of the multiple heating coil, described to control The heating power of cooking-vessel；
Cooking-vessel test section, it carries out cooking-vessel detection work, and the cooking-vessel detection work is used to detect in institute Whether the top for stating each heating coil is placed with the cooking-vessel；
Operating portion, it shows the testing result of the cooking-vessel test section；And
Priority determination section, it is directed to each heating coil of the multiple heating coil, determines to be detected by the cooking-vessel Portion to whether being placed with the priority of heating coil when the cooking-vessel detects,
According to the priority determined by the priority determination section, the cooking-vessel test section is directed to each heater wire Whether circle is placed with the cooking-vessel detection work of the cooking-vessel above it,
The priority determination section includes detection work determination section, and the detection work determination section determines the cooking-vessel inspection Whether survey portion carries out cooking-vessel detection work for each heating coil of the multiple heating coil.
23. induction heating apparatus according to claim 22,
In the case where have passed through the defined time finally carrying out operation to the operating portion from user, the detection work Determination section is directed to all the multiple heating coils, reduces detection frequency on the whole or detection frequency is set as into zero.
24. induction heating apparatus according to claim 22,
The induction heating apparatus also has the body detecting part of detection human body,
In the case where the body detecting part detects people, the cooking-vessel test section proceeds by cooking-vessel detection work Make.
25. induction heating apparatus according to claim 24,
In the case where the body detecting part does not detect people, the cooking-vessel test section stops cooking-vessel detection work Make.
CN201380045749.1A 2012-10-24 2013-10-23 Induction heating apparatus Active CN105432140B (en)

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JPJP2012-234388 2012-10-24
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JPJP2013-065860 2013-03-27
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