CN102204779A - Induction heating cooker - Google Patents
Induction heating cooker Download PDFInfo
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- CN102204779A CN102204779A CN2011100428576A CN201110042857A CN102204779A CN 102204779 A CN102204779 A CN 102204779A CN 2011100428576 A CN2011100428576 A CN 2011100428576A CN 201110042857 A CN201110042857 A CN 201110042857A CN 102204779 A CN102204779 A CN 102204779A
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Abstract
The invention provides an induction heating cooker, which can detect the temperature on the bottom in a non-contact way with high precision. The induction heating cooker comprises a top board (2) carrying a heated article (N); a solenoid (3) equipped on the lower part of the top board (2) and used for heating the heated article (N) through electromagnetic induction; a temperature sensor (4) moving away from the top board (2) and located below the top board (2); and an infrared ray shielding layer (5) covering the lower surface of the top board (2) and meanwhile opening a part as an infrared ray transmission window (5a). The temperature sensor (4) comprises a window-side sensor part (7A) for detecting the infrared rays from the infrared ray transmission window (5a); and a shielding-side sensor part (7B) for detecting infrared rays from the infrared ray shielding layer (5).
Description
Technical field
Detect the induction heating cooking instrument of cooking bottom temperature when the present invention relates to a kind of can the heating the heating objects such as pot on the top board in the mode of electromagnetic induction heating (IH).
Background technology
In the past, detect the induction heating cooking instrument of cooking bottom temperature when can heat the heating objects such as pot on the top board in the mode of electromagnetic induction heating, for example, following record is arranged: be contacted with top board by making thermistor (temperature) sensor equitemperature sensor, thereby detect cooking bottom temperature by top board in patent documentation 1.That is, make the temperature sensor that constitutes by thermistor adhere to the following central portion that is arranged at top board in this induction heating cooking instrument, detect according to this temperature sensor and by the temperature of top board to pot.
In addition, following record is arranged in this patent documentation 1: detect by infrared ray and infer cooking bottom temperature, thereby carry out temperature control to the transmission top board.That is, possessing in this induction heating cooking instrument has: infrared ray sensor is arranged at the below of solenoid, and detects from the infrared ray of heating object radiation; Heat resistance plate covers the sensitive surface of this infrared ray sensor and has the infrared transmitting characteristic; The temperature of heating object is calculated by temperature computation mechanism by the output of infrared ray sensor; And controlling organization, control the electric power of supplying with to solenoid according to the output of temperature computation mechanism.
In addition, in this induction heating cooking instrument, the output signal of the infrared ray sensor when with operational amplifier infrared ray being incident to sensitive surface is amplified, and converts voltage to and detect.
Patent documentation 1: the open 2009-259608 communique of Japan Patent
In the above-mentioned conventional art, leave following problem.
That is, in patent documentation 1 described induction heating cooking instrument,, therefore need heat to conduct to the time of top board, be difficult to the high speed detection cooking bottom temperature owing to detect cooking bottom temperature with the temperature sensor that is contacted with top board.In addition, there are the following problems point: according to being used to make thermistor (temperature) sensor (for example to be contacted with the structure of top board or state, based on the crimping of spring, contact inequality, silicone grease amount etc.), the thermal capacitance quantitative change in the thermistor (temperature) sensor of contact is big, and it is slack-off to detect the response time before.And there are the following problems: assembling increases man-hour when need be used to make thermistor (temperature) sensor to be contacted with the contact mechanism of top board, causes expensive.
On the one hand, when detecting cooking bottom temperature in non-contacting mode by infrared ray sensor, heat-resisting or the tempered glass that is used for top board absorbs a large amount of infrared rays, therefore in the patent documentation 1 described technology, exist the infrared ray of institute's transmission few and be difficult to carry out problem based on infrared ray sensor high-precision test and so on.In addition, also have ultrared transmission amount or interference volume according to the position of the pot on the top board and difference, and the precision of temperature detection is hanged down such problem points.
In addition, during the high-sensitivity detection infrared ray, use restriction to be subjected to light wavelength to carry out the photodiode etc. of high-sensitivity detection, but the detecting element problem of ultra-high price is arranged.
In addition, be photodiode or electroheat pair etc. when having utilized the detecting element of the phenomenon that electronics moves by the influence of infrared ray or heat, be subjected to the influence in the magnetic field that produces by solenoid easily and produce noise, therefore need countermeasures such as noise filter or shield.
Summary of the invention
The present invention finishes in view of aforementioned problems, and its purpose is to provide a kind of induction heating cooking instrument that can detect cooking bottom temperature with non-contacting mode high accuracy.
The present invention has adopted following structure in order to solve described problem.That is, induction heating cooking instrument of the present invention is characterized in that, possesses: top board, mounting heating object; Solenoid is arranged at the bottom of this top board and by electromagnetic induction heating described heating object is heated; Temperature sensor leaves from this top board and is arranged at the below of described top board; And infrared ray shielding layer, when covering the lower surface of described top board, open a part as the infrared transmitting window, wherein, described temperature sensor possesses and has: reveal sensor portion, be disposed at described infrared transmitting window under, detect infrared ray from described infrared transmitting window; And shielded side sensor portion, be disposed at described infrared ray shielding layer under, detect infrared ray from described infrared ray shielding layer.
In this induction heating cooking instrument, because temperature sensor possesses and has: reveal sensor portion, be disposed at the infrared transmitting window under, the infrared ray from the infrared transmitting window is detected; And shielded side sensor portion, be disposed at infrared ray shielding layer under, infrared ray from infrared ray shielding layer is detected, therefore can be by relatively based on the ultrared detection of reveal sensor portion and the shielded side sensor portion interference component that offsets, but and high accuracy detect direct infrared ray from heating objects such as pots.Promptly, in reveal sensor portion, detect by the infrared ray of infrared transmitting window from the heating object radiation, and in shielded side sensor portion, detection is by the infrared ray of infrared ray shielding layer from the top board radiation, thereby from their difference obtain remove interference component later only from the infrared ray of heating object, and precision detects the temperature of the heating object of cooking bottom temperature etc. well.In addition, in this induction heating cooking instrument, also can detect infrared ray to a certain degree, therefore can detect the temperature of heating object even heating object leaves top board.Therefore in addition, because be to detect ultrared mechanism by the temperature sensor that leaves from top board, specific heat capacity is little and response is fast mutually with the way of contact, and therefore maximum temperature step-down when therefore can measure at a high speed improves the reliability of temperature sensor.And do not need the contact mechanism with top board, therefore can reduce the installation work-hour of temperature sensor and seek cost degradation.
In addition, induction heating cooking instrument of the present invention is characterized in that, described reveal sensor portion and described shielded side sensor portion possess and have: thermistor element, the resistance value of described thermistor element changes according to irradiated infrared ray.
Promptly, in this induction heating cooking instrument, because reveal sensor portion and shielded side sensor portion possess and have: thermistor element, the resistance value of described thermistor element changes according to irradiated infrared ray, therefore detect as resistance value by the temperature difference that will in 2 thermistor elements of reveal sensor portion and shielded side sensor portion, produce, be difficult to be subjected to the influence of the electromagnetic field that causes by solenoid and can reduce noise.
In addition, induction heating cooking instrument of the present invention is characterised in that, is provided with the infrared shield wall between described shielded side sensor portion and described reveal sensor portion and the described infrared transmitting window.
Promptly, in this induction heating cooking instrument, owing to be provided with the infrared shield wall between shielded side sensor portion and reveal sensor portion and the infrared transmitting window, therefore by the infrared shield wall by infrared ray from the infrared transmitting window, can make shielded side sensor portion be not incident to the ultrared interference of reveal sensor portion and carry out more high-precision test.
And induction heating cooking instrument of the present invention is characterised in that, disposes a plurality of described temperature sensors below described top board.
Promptly, in this induction heating cooking instrument, owing to below top board, dispose a plurality of temperature sensors, therefore can detect the position of the heating object on the top board, and can carry out temperature control according to the height of the position of heating object from the distribution of the temperature that detects by each temperature sensor.
In addition, induction heating cooking instrument of the present invention is characterised in that, described reveal sensor portion and described shielded side sensor portion possess and have: the insulating properties film; The 1st temperature-sensitive element and the 2nd temperature-sensitive element leave mutually and are arranged at a face of this insulating properties film; Electric conductivity the 1st wiring film and electric conductivity the 2nd wiring film are formed at a face of described insulating properties film, and electric conductivity the 1st wiring film is connected in described the 1st temperature-sensitive element, and electric conductivity the 2nd wiring film is connected in described the 2nd temperature-sensitive element; And infrared reflection film, opposed and be arranged at the another side of described insulating properties film with described the 2nd temperature-sensitive element.
Promptly, in this induction heating cooking instrument, have and the opposed infrared reflection film that is arranged at the another side of insulating properties film of the 2nd temperature-sensitive element owing to possessing, therefore the 1st temperature-sensitive element local temperature that illuminated infrared ray absorbed ultrared insulating properties film is measured, and the 2nd temperature-sensitive element is measured the local temperature that suppresses the insulating properties film of infrared ray absorbing by the infrared reflection film reflected infrared ray greatly in contrast.Therefore, can suppress the 2nd temperature-sensitive element and insulating properties film thin and that heat conductivity is low under the infrared reflection film that ultrared influence obtains senior staff officer's ratio, obtain the good temperature difference of the 1st temperature-sensitive element and the 2nd temperature-sensitive element according to relative the 1st temperature-sensitive element.
Obtain following effect according to the present invention.
That is, according to induction heating cooking instrument involved in the present invention, because temperature sensor possesses and has: reveal sensor portion, detect infrared ray from the infrared transmitting window; And shielded side sensor portion, detection is from the infrared ray of infrared ray shielding layer, therefore can be by relatively based on the ultrared detection of reveal sensor portion and the shielded side sensor portion interference component that offsets, but and high accuracy detect direct infrared ray from pot.
Description of drawings
Fig. 1 is the concise and to the point profile of the 1st embodiment of expression induction heating cooking instrument involved in the present invention.
Fig. 2 is the stereogram of expression sensor portion in the 1st embodiment.
Fig. 3 is a stereogram of representing reveal sensor portion and shielded side sensor portion in the 1st embodiment.
Fig. 4 is the A-A alignment pseudosection of Fig. 2.
Fig. 5 is the chart of the response of the temperature measuring of expression reveal sensor portion and shielded side sensor portion in the 1st embodiment.
Fig. 6 is the temperature sensor (non-contact temperature sensor) and the chart of the response of the temperature measuring of contact-type temperature sensor in the past of expression the 1st embodiment.
Fig. 7 is the induction heating cooking instrument (a) of expression the 2nd embodiment, (b), and the vertical view of (c) during induction heating cooking instrument mounting pot at the 2nd embodiment when the induction heating cooking instrument mounting pot of the 1st embodiment.
Symbol description
1,21-induction heating cooking instrument, 2-top board, 3-solenoid, the 4-temperature sensor, 5-infrared ray shielding layer, 5a-infrared transmitting window, 7A-reveal sensor portion, 7B-shielded side sensor portion, 8-infrared shield wall, 11-insulating properties film, 12A-the 1st temperature-sensitive element, 12B-the 2nd temperature-sensitive element, 13A-the 1st wiring film, 13B-the 2nd wiring film, 15-infrared reflection film, N-heating object.
The specific embodiment
Below, referring to figs. 1 through Fig. 5 the 1st embodiment of induction heating cooking instrument involved in the present invention is described.In addition, be used for each accompanying drawing of following explanation,, suitably changed engineer's scale for each parts being made as the size that to discern or discern easily.
As shown in Figure 1, the induction heating cooking instrument 1 of present embodiment possesses and has: top board 2, mounting heating object N; Solenoid 3 is arranged at the bottom of this top board 2 and by electromagnetic induction heating heating object N is heated; Temperature sensor 4 leaves from this top board 2 and is arranged at the below of top board 2; Infrared ray shielding layer 5 when covering the lower surface of top board 2, is opened a part as infrared transmitting window 5a; Control part C is electrically connected on solenoid 3 and temperature sensor 4; And be provided with these main body case 6.
Above-mentioned heating object N be by magnetic (iron etc.) or nonmagnetic material (aluminium etc.) form the pot etc.
Above-mentioned top board 2 is formed by crystallized glass etc. and has high-fire resistance, is installed on the top of main body case 6.
Above-mentioned solenoid 3 is being configured to annular or spiral type below the top board 2 and in main body case 6, the heating object N if supply based on the electric power of alternating current, then produces high frequency magnetic field on the eddy-current heating top board 2.
Above-mentioned control part C possesses the inverter (omitting diagram) to solenoid 3 supply capabilities, and has based on the function of being controlled the electric power of supplying with to solenoid 3 by the temperature of temperature sensor 4 detected heating object N.
Said temperature sensor 4 possesses and has: the reveal sensor 7A of portion, be disposed at infrared transmitting window 5a under, detect infrared ray from infrared transmitting window 5a; And the shielded side sensor 7B of portion, be disposed at infrared ray shielding layer 5 under, detect infrared ray from infrared ray shielding layer 5.These reveal sensors 7A of portion and the shielded side sensor 7B of portion are the thermistor bolometer formula temperature sensor with identical shaped and structure.
In addition, be provided with infrared shield wall 8 between 7B of shielded side sensor portion and the reveal sensor 7A of portion and the infrared transmitting window 5a.
Above-mentioned infrared shield wall 8 for example forms tubular by the heat-resistant resins such as (PPS) of the polyphenylene sulfide with infrared shield effect, and the upper end is fixed on the lower surface of top board 2 with the form around infrared transmitting window 5a.
Above-mentioned infrared ray shielding layer 5 for example comprises the infrared shield sheets such as sprayed on material of carbon black at interior crystallized glass for what be attached at top board 2 lower surfaces.In addition, this infrared ray shielding layer 5 also can be with applying coating with infrared shield effect at the lower surface of top board 2 and form except that the infrared shield sheet.
Above-mentioned infrared transmitting window 5a for only be positioned at the reveal sensor 7A of portion directly over part peristome is set and top board 2 is exposed at infrared ray shielding layer 5 and form.
In addition, be fixed with supporting circuit board 9 in the lower end of infrared shield wall 8, this supporting circuit board 9 is provided with reveal sensor 7A of portion and the shielded side sensor 7B of portion.In addition, supporting circuit board 9 is fixed in the state around the reveal sensor 7A of portion in the lower end of infrared shield wall 8, radiates to the outside to prevent the infrared ray that is incident in the infrared shield wall 8.Like this, temperature sensor 4 is arranged at the below of top board 2 by infrared shield wall 8.In addition, in the present embodiment, temperature sensor 4 is arranged at the central portion below of top board 2.In addition, control part C is electrically connected on reveal sensor 7A of portion and the shielded side sensor 7B of portion by not shown inside distribution and supporting circuit board 9.
To shown in Figure 4, above-mentioned reveal sensor 7A of portion and the shielded side sensor 7B of portion possess respectively and have: insulating properties film 11 as Fig. 2; The 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B leave mutually and are arranged at the face (lower surface) of this insulating properties film 11; Electric conductivity the 1st wiring film 13A and electric conductivity the 2nd wiring film 13B, form pattern by Copper Foil etc. at a face of insulating properties film 11, and electric conductivity the 1st wiring film 13A is connected in the 1st temperature-sensitive element 12A, and electric conductivity the 2nd wiring film 13B is connected in the 2nd temperature-sensitive element 12B; Infrared absorbing film 14, opposed and be arranged at the another side (upper surface) of insulating properties film 11 with the 1st temperature-sensitive element 12A; Infrared reflection film 15, opposed and be arranged at the another side of insulating properties film 11 with the 2nd temperature-sensitive element 12B; And basket 16, be fixed in a face of insulating properties film 11 and support this insulating properties film 11.
That is, above-mentioned infrared absorbing film 14 be disposed at the 1st temperature-sensitive element 12A directly over, and above-mentioned infrared reflection film 15 be disposed at the 2nd temperature-sensitive element 12B directly over.Above-mentioned insulating properties film 11 is formed by the infrared transmitting film.In addition, in the present embodiment, insulating properties film 11 is formed by the polyimide resin sheet.
Above-mentioned the 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B are the chip type thermistor (thermistor element) that forms terminal electrode 12a at both ends.Thermistors such as NTC type, PTC type, CTR type are arranged as this thermistor, but in the present embodiment, for example adopted NTC type thermistor as the 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B.This thermistor is formed by thermistor materials such as Mn-Co-Cu based material, Mn-Co-Fe based materials.In addition, to make each terminal electrode 12a be engaged in wiring film 13A, 13B last and be installed on insulating properties film 11 for these the 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B.
Above-mentioned infrared absorbing film 14 is formed by the material with the infrared ray absorbing rate that is higher than insulating properties film 11, is for example formed by the film or the infrared ray-absorbable glass-film (containing the pyrex film of 71% silica etc.) that comprise infrared ray absorbing materials such as carbon black.That is, by this infrared absorbing film 14 absorb based on from the determination object thing by radiation-induced infrared ray.And the temperature of the 1st temperature-sensitive element 12A under making changes according to conducting by the heat of insulating properties film 11 from the infrared absorbing film 14 that absorbs infrared ray and heating.This infrared absorbing film 14 forms by the size greater than the 1st temperature-sensitive element 12A and covers the 1st temperature-sensitive element 12A.
Above-mentioned infrared reflection film 15 is formed by the material with the infrared emission rate that is higher than insulating properties film 11, is for example formed by the aluminium-vapour deposition film of minute surface or aluminium foil etc.This infrared reflection film 15 forms by the size greater than the 2nd temperature-sensitive element 12B and covers the 2nd temperature-sensitive element 12B.
Above-mentioned basket 16 is a resin system for example, is preferably with insulating properties film 11 and compares the low material of heat conductivity, in order to avoid the heat of insulating properties film 11 is carried out unnecessary heat release.
Be provided with the 1st accommodation section 16a and the 2nd accommodation section 16b that hold the 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B respectively separately in this basket 16.The hole portion of the cross section rectangle that these the 1st accommodation section 16a and the 2nd accommodation section 16b form for the position of corresponding the 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B respectively, peristome is to be blocked by insulating properties film 11 in the inner sealing air state.In addition, also can be lower than the Foamex of insulating properties film 11 in the inside of the 1st accommodation section 16a and the 2nd accommodation section 16b encapsulation pyroconductivity.
Above-mentioned control part C has following function: detection is carried out calculation process and obtained difference from the output of the ultrared shielded side sensor 7B of portion of top board 2 from output and the detection of the ultrared reveal sensor 7A of portion of heating object N, only calculate the infrared ray of removing interference component, obtain the temperature (cooking bottom temperature) of heating object N based on this from heating object N.In addition, control part C has following function: respectively in reveal sensor 7A of portion and the shielded side sensor 7B of portion, to carrying out calculation process, and calculate by the 1st temperature-sensitive element 12A the 2nd temperature-sensitive element 12B as the detected temperature of reference by the 1st temperature-sensitive element 12A and the detected ultrared difference of the 2nd temperature-sensitive element 12B (output difference).
The induction heating cooking instrument 1 of present embodiment has owing to temperature sensor 4 possesses like this: the reveal sensor 7A of portion, detect the infrared ray from infrared transmitting window 5a; And shielded side sensor 7B, detection is from the infrared ray of infrared ray shielding layer 5, therefore can be by relatively based on the ultrared detection of reveal sensor 7A of portion and the shielded side sensor 7B of the portion interference component that offsets, but and high accuracy detect direct infrared ray from heating object N such as pots.Promptly, in the reveal sensor 7A of portion, detect the infrared ray from heating object N radiation by infrared transmitting window 5a, and in the shielded side sensor 7B of portion, detect by the infrared ray of infrared ray shielding layer 5 from top board 2 radiation, thereby from their difference obtain remove interference component later only from the infrared ray of heating object N, and precision detects the temperature (cooking bottom temperature) of heating object N well.
In addition, the reveal sensor 7A of portion of the no infrared ray shielding layer 5 of expression and the figure of the temperature measuring response of the shielded side sensor 7B of portion that infrared ray shielding layer 5 is arranged are shown in Fig. 5.From this chart as can be known, the reveal sensor 7A of portion of no infrared ray shielding layer 5 produces tangible temperature difference in the back that reaches a high temperature in the shorter time than the shielded side sensor 7B of portion with the shielded side sensor 7B of portion, and can extract cooking bottom temperature by the ultrared amount from infrared transmitting window 5a transmission.
In addition, because be to detect ultrared mechanism by the temperature sensor that leaves from top board 24, therefore specific heat capacity is little and response is fast mutually with the way of contact, when can measure at a high speed, and the maximum temperature step-down, so the reliability of temperature sensor 4 improves.
In addition, do not need the contact mechanism with top board 2, therefore can reduce the installation work-hour of temperature sensor 4 and seek cost degradation.
In addition, for relatively, when expression being utilized the temperature sensor 4 of present embodiment of non-contact type (non-contact temperature sensor) and when utilizing contact-type temperature sensor in the past the figure of the temperature measuring response of (contact-type temperature sensor) be shown in Fig. 6.From this chart as can be known, the response of the non-contact temperature sensor 4 of present embodiment is faster than the response of contact-type temperature sensor in the past.
In addition, because reveal sensor 7A of portion and the shielded side sensor 7B of portion possess and have: temperature-sensitive element, described temperature-sensitive element is the thermistor element that resistance value changes according to irradiated infrared ray, therefore detect as resistance value by the temperature difference that will in 2 thermistor elements of reveal sensor 7A of portion and the shielded side sensor 7B of portion, produce, be difficult to be subjected to the influence of the electromagnetic field that causes by solenoid 3 and can reduce noise.
In addition, be provided with infrared shield wall 8 between shielded side sensor 7B of portion and the reveal sensor 7A of portion and the infrared transmitting window 5a, therefore by infrared shield wall 8 by infrared ray from infrared transmitting window 5a, can make the shielded side sensor 7B of portion be not incident to the ultrared interference of the reveal sensor 7A of portion and carry out more high-precision test.
In addition, because possessing has infrared reflection film 15, described infrared reflection film and the 2nd temperature-sensitive element 12B are opposed and be arranged at the another side of insulating properties film 11, therefore the 1st temperature-sensitive element 12A measures illuminated infrared ray and the local temperature that absorbs ultrared insulating properties film 11, and the 2nd temperature-sensitive element 12B measures the local temperature that suppresses the insulating properties film 11 of infrared ray absorbing by infrared reflection film 15 reflected infrared raies greatly in contrast.Therefore, can suppress the 2nd temperature-sensitive element 12B under the infrared reflection film 15 that ultrared influence obtains senior staff officer's ratio according to relative the 1st temperature-sensitive element 12A; And approach and the low insulating properties film 11 of heat conductivity, obtain the good temperature difference of the 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B.
Promptly, can stop it to absorb by the infrared ray in the part directly over infrared reflection film 15 reflection the 2nd temperature-sensitive element 12B, and can access and be in reflected infrared ray not part under the 1st temperature-sensitive element 12A between the temperature difference and the 2nd temperature-sensitive element 12B is made as senior staff officer's ratio.
In addition, the medium deacration that the heat between the 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B is conducted only becomes insulating properties film 11 in addition, and the sectional area that is conducted diminishes.Therefore, be difficult to conduct heat to mutual temperature-sensitive element, interference diminishes and improves detection sensitivity.Because the thermal coupling of the 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B is low, therefore also can adjacent to each otherly dispose like this, thereby can seek whole miniaturization.Owing to can make temperature sensor 4 miniaturizations, therefore can be disposed at the gap of solenoid 3 like this.
In addition, be not based on the light-shielding structure of framework or casing, but, therefore can make at an easy rate by infrared reflection film 15 shading infrared rays.
In addition, even infrared reflection film 15 is made of conductive material, also guaranteed the 1st temperature-sensitive element 12A that is provided with clipping insulating properties film 11 and the insulation of the 2nd temperature-sensitive element 12B, therefore no matter how the insulating properties of film can the good material of efficiency of selection.
Like this, have following structure: on the insulating properties film 11 of low heat conductivity, mutually suppress the 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B of the influence of heat, respectively under the illuminated ultrared part in insulating properties film 11 and the part of reflected infrared ray under temperature measure.
Therefore, can obtain becoming the 1st temperature-sensitive element 12A that infra-red detection uses and become the good temperature difference of the 2nd temperature-sensitive element 12B that temperature-compensating uses, thereby can seek high sensitivityization.
In addition, also can remove infrared absorbing film 14, but by directly over the 1st temperature-sensitive element 12A, forming infrared absorbing film 14, thereby the infrared absorption effect among the 1st temperature-sensitive element 12A improves, and can access the better temperature difference of the 1st temperature-sensitive element 12A and the 2nd temperature-sensitive element 12B.
Secondly, below with reference to 2nd embodiment of Fig. 7 to the induction heating cooking instrument that the present invention relates to, describe.In addition, in the explanation of following embodiment, the additional same-sign of the identical structure important document of explanation is in the above-described embodiment omitted its explanation.
The difference of the 2nd embodiment and the 1st embodiment is, in the 1st embodiment, below the central portion of top board 2, be provided with 1 temperature sensor 4, on the contrary, in the induction heating cooking instrument 21 of the 2nd embodiment, shown in Fig. 7 (a), below top board 2, dispose a plurality of temperature sensors 4.
Promptly, shown in Fig. 7 (b), in the 1st embodiment, below the central portion of top board 2, be provided with 1 temperature sensor 4, but depart from and during mounting from the central authorities (central authorities of solenoid 3) of top board 2 at the pot of heating object N, when can't survey, do not have heating object N directly over the temperature sensor 4 and can't correctly detect cooking bottom temperature by the position of the heating object N of mounting.
Relative therewith, in the induction heating cooking instrument 21 of the 2nd embodiment, shown in Fig. 7 (a), in 1 stove and accessory, 4 temperature sensors 4 spaced-apart predetermined space and be arranged on the four directions below top board 2 is arranged, shown in Fig. 7 (c),, also can detect heating object N and be positioned in which position from 4 temperature sensors 4 detected temperatures separately even pot central authorities from top board 2 of heating object N depart from and mounting.
For example, shown in Fig. 7 (c), when depart from and during mounting in heating object N upper right side in the drawings, be arranged at when top-right temperature sensor 4 detects maximum temperature among the figure, low by other 3 temperature sensors, 4 detected detected temperatures, especially the temperature sensor 4 of lower left detects minimum temperature, so control part C can discern heating object N upper right side in the drawings and departs from and mounting.At this moment, among the control part C, heating object N control that can corresponding mounting position deviation is supplied with to the electric power of solenoid 3.
Like this in the induction heating cooking instrument 21 of the 2nd embodiment, there are a plurality of temperature sensors 4 to be disposed at the below of top board 2, therefore can be from detecting the position of the heating object N on top boards 2 by each temperature sensor 4 detected Temperature Distribution, and can carry out temperature control according to the height of the position of heating object N.
In addition, technical scope of the present invention is not limited to the respective embodiments described above, can impose various changes in the scope that does not break away from aim of the present invention.
For example, in each above-mentioned embodiment, adopt the 1st temperature-sensitive element and the 2nd temperature-sensitive element of chip type thermistor, but also can adopt the 1st temperature-sensitive element and the 2nd temperature-sensitive element that forms by thin-film thermistor.
In addition, as temperature-sensitive element such as above-mentionedly utilized thin-film thermistor or chip type thermistor, but except that temperature-sensitive resistance, can also adopt thermoelectric element etc.
Claims (9)
1. induction heating cooking instrument is characterized in that possessing:
Top board, the mounting heating object;
Solenoid is arranged at the bottom of this top board and by electromagnetic induction heating described heating object is heated;
Temperature sensor leaves from this top board and is arranged at the below of described top board; And
Infrared ray shielding layer when covering the lower surface of described top board, is opened a part as the infrared transmitting window,
Wherein, described temperature sensor possesses has:
Reveal sensor portion, be disposed at described infrared transmitting window under, detect infrared ray from described infrared transmitting window; And
Shielded side sensor portion, be disposed at described infrared ray shielding layer under, detect infrared ray from described infrared ray shielding layer.
2. induction heating cooking instrument as claimed in claim 1 is characterized in that,
Described reveal sensor portion and described shielded side sensor portion possess thermistor element are arranged, and the resistance value of described thermistor element changes according to irradiated infrared ray.
3. induction heating cooking instrument as claimed in claim 1 or 2 is characterized in that,
Be provided with the infrared shield wall between described reveal sensor portion and described infrared transmitting window and the described shielded side sensor portion.
4. induction heating cooking instrument as claimed in claim 1 or 2 is characterized in that,
Below described top board, dispose a plurality of described temperature sensors.
5. induction heating cooking instrument as claimed in claim 1 or 2 is characterized in that,
Described reveal sensor portion and described shielded side sensor portion possess and have:
The insulating properties film;
The 1st temperature-sensitive element and the 2nd temperature-sensitive element leave mutually and are arranged at a face of this insulating properties film;
Electric conductivity the 1st wiring film and electric conductivity the 2nd wiring film are formed at a face of described insulating properties film, and electric conductivity the 1st wiring film is connected in described the 1st temperature-sensitive element, and electric conductivity the 2nd wiring film is connected in described the 2nd temperature-sensitive element;
And infrared reflection film, opposed and be arranged at the another side of described insulating properties film with described the 2nd temperature-sensitive element.
6. induction heating cooking instrument as claimed in claim 3 is characterized in that,
Below described top board, dispose a plurality of described temperature sensors.
7. induction heating cooking instrument as claimed in claim 3 is characterized in that,
Described reveal sensor portion and described shielded side sensor portion possess and have:
The insulating properties film;
The 1st temperature-sensitive element and the 2nd temperature-sensitive element leave mutually and are arranged at a face of this insulating properties film;
Electric conductivity the 1st wiring film and electric conductivity the 2nd wiring film are formed at a face of described insulating properties film, and electric conductivity the 1st wiring film is connected in described the 1st temperature-sensitive element, and electric conductivity the 2nd wiring film is connected in described the 2nd temperature-sensitive element;
And infrared reflection film, opposed and be arranged at the another side of described insulating properties film with described the 2nd temperature-sensitive element.
8. induction heating cooking instrument as claimed in claim 4 is characterized in that,
Described reveal sensor portion and described shielded side sensor portion possess and have:
The insulating properties film;
The 1st temperature-sensitive element and the 2nd temperature-sensitive element leave mutually and are arranged at a face of this insulating properties film;
Electric conductivity the 1st wiring film and electric conductivity the 2nd wiring film are formed at a face of described insulating properties film, and electric conductivity the 1st wiring film is connected in described the 1st temperature-sensitive element, and electric conductivity the 2nd wiring film is connected in described the 2nd temperature-sensitive element;
And infrared reflection film, opposed and be arranged at the another side of described insulating properties film with described the 2nd temperature-sensitive element.
9. induction heating cooking instrument as claimed in claim 6 is characterized in that,
Described reveal sensor portion and described shielded side sensor portion possess and have:
The insulating properties film;
The 1st temperature-sensitive element and the 2nd temperature-sensitive element leave mutually and are arranged at a face of this insulating properties film;
Electric conductivity the 1st wiring film and electric conductivity the 2nd wiring film are formed at a face of described insulating properties film, and electric conductivity the 1st wiring film is connected in described the 1st temperature-sensitive element, and electric conductivity the 2nd wiring film is connected in described the 2nd temperature-sensitive element;
And infrared reflection film, opposed and be arranged at the another side of described insulating properties film with described the 2nd temperature-sensitive element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010083278A JP2011216323A (en) | 2010-03-31 | 2010-03-31 | Induction heating cooker |
| JP2010-083278 | 2010-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102204779A true CN102204779A (en) | 2011-10-05 |
Family
ID=44694049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100428576A Pending CN102204779A (en) | 2010-03-31 | 2011-02-21 | Induction heating cooker |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2011216323A (en) |
| CN (1) | CN102204779A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103369754A (en) * | 2012-03-28 | 2013-10-23 | 日立空调·家用电器株式会社 | Induction heating cooker |
| CN104025219A (en) * | 2012-01-08 | 2014-09-03 | 捷通国际有限公司 | Inductive cooking system |
| CN105916421A (en) * | 2014-02-25 | 2016-08-31 | 松下知识产权经营株式会社 | Blade body, container having blade body attached, and heat-cooking apparatus |
| CN107084411A (en) * | 2017-05-26 | 2017-08-22 | 浙江绍兴苏泊尔生活电器有限公司 | Control method of electromagnetic oven cooker |
| CN109798557A (en) * | 2017-11-17 | 2019-05-24 | 美的集团股份有限公司 | Electromagnetic heating apparatus temp measuring system and electromagnetic heating apparatus |
| CN110383943A (en) * | 2017-03-30 | 2019-10-25 | 松下知识产权经营株式会社 | The manufacturing method of induction heating cooking instrument and induction heating cooking instrument |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7054822B2 (en) * | 2018-09-25 | 2022-04-15 | パナソニックＩｐマネジメント株式会社 | Induction heating cooker |
| JP7228778B2 (en) * | 2018-09-25 | 2023-02-27 | パナソニックＩｐマネジメント株式会社 | induction cooker |
| JP7129868B2 (en) * | 2018-09-28 | 2022-09-02 | 三菱電機株式会社 | heating cooker |
-
2010
- 2010-03-31 JP JP2010083278A patent/JP2011216323A/en not_active Withdrawn
-
2011
- 2011-02-21 CN CN2011100428576A patent/CN102204779A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104025219A (en) * | 2012-01-08 | 2014-09-03 | 捷通国际有限公司 | Inductive cooking system |
| CN103369754A (en) * | 2012-03-28 | 2013-10-23 | 日立空调·家用电器株式会社 | Induction heating cooker |
| CN103369754B (en) * | 2012-03-28 | 2015-12-23 | 日立空调·家用电器株式会社 | Induction cooking device |
| CN105916421A (en) * | 2014-02-25 | 2016-08-31 | 松下知识产权经营株式会社 | Blade body, container having blade body attached, and heat-cooking apparatus |
| CN105916421B (en) * | 2014-02-25 | 2018-12-11 | 松下知识产权经营株式会社 | Blade body, container and heating device with blade body |
| CN110383943A (en) * | 2017-03-30 | 2019-10-25 | 松下知识产权经营株式会社 | The manufacturing method of induction heating cooking instrument and induction heating cooking instrument |
| CN107084411A (en) * | 2017-05-26 | 2017-08-22 | 浙江绍兴苏泊尔生活电器有限公司 | Control method of electromagnetic oven cooker |
| CN107084411B (en) * | 2017-05-26 | 2018-12-07 | 浙江绍兴苏泊尔生活电器有限公司 | Control method of electromagnetic oven cooker |
| CN109798557A (en) * | 2017-11-17 | 2019-05-24 | 美的集团股份有限公司 | Electromagnetic heating apparatus temp measuring system and electromagnetic heating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011216323A (en) | 2011-10-27 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111005 |