JP2014096243A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heat a pan having any shape and heat the pan regardless of a shape of the pan as a heating object in a simple composition and with high efficiency.SOLUTION: An induction heating cooker comprises a pan backup part 101. The pan backup part 101 is formed by a plurality of coil holding parts 102. The coil holding parts 102 include heating coils 103, respectively. By composing the coil holding parts 102 to be movable in a vertical direction, in a horizontal direction or in a rotational direction, the coil holding parts 102 move such that shapes of the heating coils 103 fit a shape of the pan thereby to increase heating efficiency.

Description

  The present invention relates to an induction heating cooker that forms the shape of a heating coil in accordance with the shape of the bottom of a pan.

  Conventionally, this type of induction heating cooker places a heated object such as a pan with a flat bottom on a flat top plate so as to correspond to the heating coil, and generates a high-frequency magnetic flux generated from the heating coil. Since the heating body is heated by magnetic coupling, a wok having a spherical bottom surface has a small contact area with the top plate and weak magnetic coupling. For this reason, there has been a drawback in that woks cannot be heated, but in order to solve this, a technology is known in which a top plate is formed in a predetermined concave shape so that woks with a spherical bottom surface can also be heated. (For example, refer to Patent Document 1).

  However, in the above configuration, when heating a heated object such as a flat pot with a bottom surface or a spherical pot different from the predetermined concave curvature, the top plate is formed in a predetermined concave shape, so the heating coil and the heated object In some cases, the magnetic coupling becomes weak and cannot be heated.

  Not only the shape of the bottom of the pot, but also a plurality of closed magnetic path formers adjusted in height are inserted concentrically between the bottom of the pan and the top plate so that the pot can be heated, and the top of this closed magnetic path former is the bottom of the pan A technique is known in which a pot can be induction-heated by forming a closed magnetic path with a heating coil, a pot bottom, and a heating coil arranged in a plane so that the lower part contacts with the top plate (see, for example, Patent Document 2).

  In addition, there is a technique using a flexible coil holding member that can be expanded and contracted (see, for example, Patent Document 3).

JP-A-7-201443 JP 2007-329020 A JP-A-11-102778

  However, the configuration described in Patent Document 2 has a problem that energy loss occurs in the closed magnetic path formation body because the heating coil arranged in a plane inductively heats the pan through the plurality of closed magnetic path formation bodies. .

  Moreover, in the structure of the said patent document 3, since the high rigidity which supports the weight of a pan to a coil holding member, the high elasticity which can be deform | transformed according to a pan bottom shape, heat resistance, insulation, etc. are calculated | required, it is a general industrial member. Had the problem that was not satisfied.

  This invention solves the said conventional subject, and provides the induction heating cooking appliance which achieves a high heating efficiency with the simple structure which can be implement | achieved also with a general industrial member.

In order to solve the conventional problem, an induction heating cooker according to the present invention includes a pan receiver that holds a pan to be heated, and the pan receiver is formed by a plurality of coil holders. The holding unit includes a heating coil, and the coil holding unit is configured to move freely in the vertical and horizontal directions or in the rotational direction.

  With this configuration, the coil holding portion including the heating coil moves in the vertical and horizontal directions or in the rotation direction according to the bottom shape of the pan, so it can be used for both a flat bottom pan and a spherical pan such as a wok. In addition, the heating efficiency can be increased with a simple structure that can be realized even with general industrial members.

  The induction heating cooker of the present invention can cope with an arbitrarily shaped pan, and has a simple structure that can be realized even with general industrial members, and can increase the heating efficiency.

The bird's-eye view which shows the structure of the induction heating cooking appliance in Embodiment 1 of this invention Sectional drawing which shows the structure of the induction heating cooking appliance in the embodiment The control block diagram which shows the structure of the induction heating cooking appliance in Embodiment 1 or Embodiment 2 of this invention Control flowchart of induction heating cooker in Embodiment 1 or Embodiment 2 of the present invention (A) Cross-sectional structure diagram showing an example of “end part is rotating shaft” in the embodiment (b) Cross-sectional structure diagram showing an example of “middle part is rotating shaft” in the same embodiment (A) Structural diagram of hexagonal coil holding part showing arrangement of “one circular” heating coil of the embodiment (b) Hexagon showing arrangement of “one polygonal” heating coil of the embodiment Structural diagram of coil holding part (c) Structural diagram of hexagonal coil holding part showing arrangement of “plurality of circular circles” heating coil of the embodiment (d) “Plurality of different size circles” of the embodiment Structural diagram of pentagonal coil holding part showing arrangement of heating coil (e) Structural drawing of circular coil holding part showing arrangement of “plurality of polygonal” heating coils in the same embodiment (f) “ Structural drawing of circular coil holding part showing the arrangement of "combination of multiple shapes" heating coil Overhead view showing structure of induction heating cooker in embodiment 2 of the present invention (A) Cross-sectional structure diagram showing an example of “peripheral part rise” of the induction heating cooker in the embodiment (b) Cross-sectional structure diagram showing an example of “center part descent” of the induction heating cooker in the embodiment An overhead view showing an example of the arrangement of stable bands in the same embodiment Sectional drawing which shows an example with a stable band in the same embodiment (A) Overhead view showing structure of induction heating cooker in embodiment 3 of the present invention (b) Structure diagram of coil holding part showing an example of “non-uniform heating coil arrangement” in the embodiment (c) Structural diagram of coil holding part showing an example of “use of non-uniform material” in the embodiment Sectional drawing which shows the structure of the induction heating cooking appliance in Embodiment 3 of this invention The perspective view which shows the structure of the induction heating cooking appliance in the embodiment

  1st invention is equipped with the pan holder which hold | maintains the pan which is heating object, The said pan receiver is formed by the several coil holding part, The said coil holding part is provided with the heating coil, and it was up and down, right and left or the rotation direction It is configured to move freely.

  With this configuration, the coil holding part moves so that the shape of the heating coil matches the shape of the pan bottom, the distance between the pan bottom and the heating coil can be held at an effective induction heating distance, and the pan can be heated with high efficiency. .

  According to a second aspect of the present invention, in the first aspect of the present invention, the coil holding portions are arranged concentrically. With this configuration, when using a pan that is not a flat bottom, the heating coil can be in contact with the bottom of the pan. The efficiency can be further increased, and when using a flat pan at the bottom, there is no gap between the coil holding portions, so that overheating of the pan can be suppressed and uniform heating can be achieved. The convenience of hygienic arrangement can be improved.

  According to a third aspect of the present invention, in the second aspect of the present invention, in the second aspect of the invention, a stable band is provided, and the stable band stably holds the position of each heating coil of the coil holding portion. Even if the shape changes, the spatial distance of each heating coil is maintained, and mutual induction and overcurrent generation due to the proximity of the heating coil can be suppressed. Further, the stable band interlocks the coil holding unit. Even if only a part of the coil holding part moves, the shape of the heating coil can be matched with the shape of the bottom of the pan, which is excellent in terms of manufacturing and cost.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the coil holding portion is arranged circumferentially. With this configuration, when using a pan that is not a flat bottom portion, the heating coil contacts or approaches the pan bottom portion. Heating efficiency can be further improved, and when using a flat pan at the bottom, there is no gap between the coil holding parts, so that overheating of the pot can be suppressed and uniform heating can be achieved. The convenience of sanitary arrangement can be improved during storage.

  According to a fifth invention, in any one of the second to fourth inventions, a movable means is provided, and the movable means moves the coil holding portion up and down, right and left or in a rotation direction. The shape of the heating coil in the coil holding part can be changed or maintained, and the movable means can return the coil holding part to a flat surface during storage.

  6th invention is a structure which has a detection means in 5th invention, and the said detection means detects pan states, such as a shape and a position of a pan, The said movable means based on the pan state which the said detection means detected However, by finely adjusting the position of the coil holding part, the distance between the heating coil and the pan bottom can be restricted to the effective distance of induction heating, and the heating efficiency can be further increased.

  According to a seventh invention, in the fourth invention, a plurality of circular heating coils are arranged in the coil holding part, and this arrangement allows a plurality of heating coils to be arranged even when the coil holding part is not circular. The heating area can be increased.

  According to an eighth aspect of the invention, in particular, in the fourth aspect of the invention, the coil holding portions are arranged radially, and this configuration makes the control simple because all the coil holding portions move in a rotating manner. Due to the characteristics such as the position of the center of gravity of the holding portion, the coil holding portion can be automatically returned when stored.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is an overhead view showing the structure of the induction heating cooker according to the first embodiment of the present invention.

  In FIG. 1, an induction heating cooker 100 includes a pan receiver 101 that holds a pan to be heated. The pan receiver 101 is formed by a plurality of coil holders 102, and the coil holder 102 includes a heating coil 103. It is configured to move up and down, left and right or in the direction of rotation.

  The pan receiving unit 101 includes seven units of the coil holding unit 102 and is arranged in the pan receiving unit 101. Among them, the coil holding part 102 a can move up and down, and the coil holding parts 102 b to 102 g can rotate around the rotation shaft 105.

  An infrared sensor that is an example of the detection unit 104 is disposed on the coil holding unit 102. The coil holding unit 102 does not necessarily have to include a detection unit, and a certain number may be provided as necessary. For example, only two (104a, 104b), three (104a, 104b, 104e), and four (104a, 104b, 104d, 104f) detectors 104 may be arranged.

  Note that the detection means 104 is not limited to an infrared sensor. Other examples of the detecting means include a digital camera and an ultrasonic sensor that can detect the pan shape or pan position, a thermistor that can detect the pan temperature, and a pressure sensor that can detect the pan weight distribution.

  FIG. 2 is a cross-sectional view showing the structure of the induction heating cooker according to the first embodiment of the present invention, showing the structure of the induction heating cooker cut based on the cutting plane position line AB in FIG. It is.

  In FIG. 2, the coil holding unit 102 includes a heating coil 103 and a detection unit 104, and is connected to the movable unit 201. The movable means 201 is configured to move the coil holding portion 102 in the up / down / left / right or rotational direction. For convenience of explanation, the state when the coil holding unit 102 is stored is indicated by a dotted line, and is denoted as the coil holding unit 1021 when stored.

  The movable means 201a is a movable means for moving the coil holding portion 102 up and down, and the movable means 201c and 201f are movable means for rotating the coil holding portion 102 about the rotation shaft 105.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  FIG. 3 is a control block diagram showing the configuration of the induction heating cooker according to the first embodiment of the present invention.

  In FIG. 3, the control unit 301 receives a manual command from the user by the pan state information such as the presence / absence of the pan detected by the detecting unit 104, the pan shape and the pan position, or the manual input 302, and controls the movable unit 201 to The shape of the configured pan receiving part 101 is controlled.

  First, the flow of control of the detection unit 104, manual input 302, control unit 301, movable unit 201, and coil holding unit 102 will be described using the control flowchart of FIG. FIG. 4 is a control flow performed in one control cycle of the induction heating cooker 100.

  In FIG. 4, the control means 301 receives the command from the manual input 302 (step S401). If the user's manual command is detected from the manual input 302 in step 401 (step S401, Yes), the control unit 301 decodes the user's manual command, and in step S420, each movable unit 201 is set based on the control content of the manual input 302. Control. After execution of step S420, this control cycle is terminated, and when the next control cycle is reached, the process returns to step S401.

  The user's manual command received by the manual input 302 includes control contents that are forcibly returned to the coil holding unit 1021 when the coil holding unit 102 is housed, and the position of the coil holding unit 102 is manually adjusted to be transferred to the movable unit 201.

When there is no user's manual command from the manual input 302 in step S401 (step S40)
1, No), the control means 301 receives the result of detecting the pan state information such as the presence or absence of the pan, the shape of the pan or the shape of the pan (step S402), and the presence or absence of the pan is determined (step S403). .

  When the control means 301 determines that there is no pan in step 403 (step S403, Yes), each movable means 201 is automatically returned so that each coil holding part 102 becomes the position of the coil holding part 1021 when stored (step 403). S430). After execution of step S430, this control cycle is terminated, and when the next control cycle is reached, the process returns to step S401.

  When it is determined in step 403 that the control means 301 has a pan (step S403, No), the optimum position of each coil holding portion 102 is calculated based on the result of the pan state detected by the detection means 104, and each coil is held. The current position of the part is acquired (step S404). Further, the current position of each coil holding unit 102 acquired by the control unit 301 in step S404 is compared with the optimum position of each coil holding unit 102 calculated in the same step, and whether each coil holding unit 102 is in the optimum position. It is determined whether or not (step S410).

  Here, the optimum position is the position of the coil holding part that maximizes the induction heating efficiency of the heating coil 103.

  If the control means 301 can determine in step S410 that each coil holding portion 102 is in the optimum position (step S410, Yes), the control period is terminated without controlling each movable means 201, and the next control period is reached. Returns to step S401.

  If the control means 301 can determine in step S410 that a certain coil holding portion 102 is not in the optimum position (No in step S410), the moving distance and rotation of each movable means 201 so that the coil holding portion 102 is in the optimum position. Control details such as an angle are calculated (step S411). Based on the control content calculated in step S411, the control unit 301 controls each movable unit 201 (step S412). After execution of step S412, this control cycle is terminated, and when the next control cycle is reached, the process returns to step S401.

  Next, a usage example of the present invention will be described with reference to the cross-sectional view of FIG.

  When the induction heating cooker is housed or when the pan that is the bottom flat surface is heated, the coil holding part 102 becomes the coil holding part 1021 at the time of storage indicated by a dotted line.

  When the induction heating cooker heats a non-planar pan, for example, if the pan 200 to be heated is placed on the induction heating cooker, the user does not issue a manual command to the manual input 302 (No in step S401). ), The infrared sensors 104a to 104g as the detecting means 104 detect that there is a pan 200 to be heated (step S402, step S403), and detect the pan state such as the shape and position of the pan (step S402).

  Based on the result detected by each detection means 104, the optimum position of each coil holding part 102a-102g is calculated so that the shape of the heating coil 103 matches the shape of the pan 200 to be heated, and each coil holding part 102a-102g. Is acquired (step S404). Further, the distance at which the coil holding portion 102a with the movable means 201a at the center should be moved down and the angle at which the coil holding portions 102b through 102g with the movable means 201b to 201g around should be rotated based on the rotation axis 105 are calculated. (Step S411).

Based on the control content calculated in step S411, the movable means 201a moves the coil holding part 102a with the movable means 201a at the center downward by a predetermined distance. Based on the rotation angle (step S412). When this control cycle ends, the next control cycle is reached, and the control content is adjusted based on the user's manual input 302 or the detection means 104.

  When the user removes the pan 200 from the top of the induction heating cooker after the induction heating cooker has heated the non-planar pan, the user does not issue a manual command via the manual input 302 (NO in step S401). The infrared sensors 104a to 104g, which are the detection means 104, detect that there is no pan 200 to be heated (steps S402 and S403). Each movable means 201 is automatically returned so that each coil holding part 102 becomes the position of the coil holding part 1021 at the time of storage (step S430). Specifically, the coil holding portion 102a having the movable means 201a at the center is moved upward by a predetermined distance, and at the same time, the coil holding portions 102b to 102g having the movable means 201b to 201g are moved at a predetermined angle based on the rotation shaft 105. It rotates in the reverse direction (step S430). When this control cycle ends, the next control cycle is reached, and the control content is adjusted based on the user's manual input 302 or the detection means 104.

  In addition, it is not limited to providing the multiple types of movable means shown in FIG. In this embodiment, as will be described later with reference to FIGS. 5A to 5B, the same effect can be obtained with only one kind of movable means.

  As shown in FIG. 5A, when a pan 200 that is not a flat bottom surface is detected from the state of the coil holding portion 1021 when the coil holding portion 102 is housed as indicated by a dotted line (step S403), each movable means 201 moves to each coil holding portion. 102 is rotated at a predetermined angle based on the rotating shaft 105 at the end (step S412). The rotation angle is calculated based on the pan state base detected by the detecting means 104 (step S404, step S410, step S411).

  Further, as shown in FIG. 5B, when the pan 200 that is not the bottom plane is detected from the state of the coil holding portion 1021 at the time of storage indicated by a dotted line (step S403), each movable means 201 centers each coil holding portion 102. Is rotated at a predetermined angle on the basis of the rotation shaft 105 (step S412). The rotation angle is calculated based on the pan state base detected by the detecting means 104 (step S404, step S410, step S411).

  In the above operation, by moving the coil holding part up and down or in the rotation direction, it was possible to cope with an arbitrarily shaped pan, and by matching the shape of the heating coil to the bottom shape of the pan to be heated, The distance to the pan can be constrained to the effective heating distance, and the pan can be heated with high efficiency.

  In addition, a rotating shaft is not limited to the center or end part of a coil holding | maintenance part. Further, it is possible to rotate in any direction based on the fulcrum without fixing the rotation shaft.

  The movable means may be moved by other methods. For example, the shape of the heating coil can be adjusted to the shape of the pan bottom by moving the coil holding part to the left or right or rotating the coil holding part while moving the coil holding part up, down, left, or right.

  Further, the shape of the coil holding part and the arrangement method such as the shape, number, position, size, etc. of the heating coil arranged in the coil holding part are not limited.

An example of the shape of the coil holding part and the arrangement of the heating coil is shown in FIG. FIG. 6A shows an embodiment in which one circular heating coil is arranged in a hexagonal coil holding portion. FIG. 6B shows an embodiment in which one hexagonal heating coil is arranged in the hexagonal coil holding portion. FIG. 6C shows an example in which a plurality of circular heating coils having the same size are arranged in a hexagonal coil holding portion. FIG. 6D shows an embodiment in which a plurality of circular heating coils having different sizes are arranged in a pentagonal coil holding portion. FIG. 6E is an embodiment in which a plurality of non-circular (hexagonal) heating coils of the same size are arranged in a circular coil holding part. FIG. 6F shows an embodiment in which a plurality of heating coils having different shapes are arranged in a circular coil holding portion.

  The shape of the coil holding part is not limited. For example, as will be described later with reference to FIG. 11, the shape of the coil holding portion may be a shape that is not centrally symmetric.

  With this configuration, the design of the coil holding part can be improved, and the effective heating area of the coil holding part can be expanded.

  As described above, the arrangement of the detection means is not limited to the coil holding unit. The presence / absence of the detection means and the position of the detection means can be changed as necessary.

  Moreover, you may arrange | position a detection means in the other position of an induction heating cooking appliance, without arrange | positioning in a coil holding | maintenance part.

  By this structure, the design property of the whole induction heating cooking appliance can be improved.

(Embodiment 2)
FIG. 7 is an overhead view showing the structure of the induction heating cooker according to the second embodiment of the present invention.

  In FIG. 7, the pan receiving part 101 is formed by the coil holding | maintenance part 102 arrange | positioned concentrically. Sectional drawing which shows the structure of the induction heating cooking appliance cut | disconnected based on the cut surface position line CD of FIG. 7 is FIG. 8 (a) or FIG.8 (b).

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The control block (FIG. 3) and control flow (FIG. 4) of the induction heating cooker are the same as in the first embodiment of the present invention.

  As shown in FIG. 8 (a), when the non-planar pan 200 is detected from the position of the coil holding portion 1021 during storage shown by a dotted line (step S403), the coil holding portion 702a at the center remains fixed and is moved to the periphery. The coil holding portions 702b and 702c are moved upward (step S412). The distance that each movable means 201 moves up the respective coil holding portions 702b and 702c is calculated based on the pan state detected by the detecting means 104 (step S404, step S410, step S411).

  Further, as shown in FIG. 8B, when the non-planar pan 200 is detected from the position of the coil holding portion 1021 during storage shown by the dotted line (step S403), the coil holding portion 702c at the end remains fixed. Then, the coil holding portions 702a and 702b in the middle are moved downward (step S412). The distance that each movable means 201 moves down the coil holding portions 702a and 702b is calculated based on the pan state base detected by the detection means 104 (step S404, step S410, step S411).

  In the above operation, by moving the coil holding part up and down, it was possible to cope with an arbitrarily shaped pan, and by matching the shape of the heating coil to the bottom shape of the pan to be heated, the heating coil and pan Can be constrained to the effective heating distance, and the pot can be heated with high efficiency.

FIG. 9 is an overhead view showing the structure of the induction heating cooker with a stable band in the second embodiment of the present invention.

  In FIG. 9, three stable bands 901 are arranged so as to be symmetric with respect to the center of the circle.

  Here, in order to stably hold the position of each heating coil of the coil holding portion, the stable band 901 is configured to be deformed as the movable means 201 changes the position of each coil holding portion 702, and at least in one direction. There is elasticity. In order to realize the stretchability, there are several methods such as whether the material is made of a resin or composite material having a high elastic modulus or mechanically like a spring. Furthermore, the stable band 901 is required to have non-magnetic material characteristics so as not to affect the efficiency of the induction magnetic path formed by the pan 200 and the heating coil 103. Moreover, since the pan 200 becomes high temperature, heat resistance is also calculated | required.

  FIG. 10 is a cross-sectional view showing the structure of the induction heating cooker with a stable band in the second embodiment of the present invention, the structure of the induction heating cooker cut based on the cutting plane position line EF of FIG. Is shown.

  In FIG. 10, a stable band 901 includes a fixing element 902, and the fixing element 902 is configured to stably hold the position of the heating coil 103 of each coil holding portion 702.

  Here, the fixing element 902 is required to have heat resistance and non-magnetism, but is not required to be stretchable. For example, a screw made of a heat-resistant fluororesin.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  As shown in FIG. 10, when the non-planar pan 200 is detected from the position of the coil holding part 1021 during storage shown by the dotted line (step S403), the coil holding part 702a at the center is fixed and the coil at the end is fixed. Only the holding unit 702c is moved upward (step S412). The distance that the movable means 201 moves up the coil holding part 702c at the end is calculated based on the pan state base detected by the detecting means 104 (step S404, step S410, step S11). When the coil holding portion 702c at the end moves upward, the end of the stabilization band 901 moves upward, and the middle coil holding portion 702b fixed by the fixing element 902 is interlocked upward.

  In the above operation, by moving the coil holding part up and down, it was possible to cope with an arbitrarily shaped pan, and by matching the shape of the heating coil to the bottom shape of the pan to be heated, the heating coil and pan Can be constrained to the effective heating distance, and the pot can be heated with high efficiency. Furthermore, the movable means of the induction heating cooker with the stable band can be configured by one from the induction heating cooker without the stable band, and the number of parts can be reduced. Further, since the stable band stably holds the position of each heating coil of the coil holding part, it is possible to suppress mutual induction and overcurrent generation due to the proximity of the heating coil.

  Alternatively, the coil holding portion at the end may be fixed, the coil holding portion at the center may be moved downward, and the middle coil holding portion may be linked downward with a stable band.

  The number of stable bands is not limited to three.

  Further, the position of the stable band is not limited to the upper part of the coil holding part. For example, the stable band may be arranged at the lower part of the coil holding part, or may be arranged at both the upper part and the lower part of the coil holding part.

(Embodiment 3)
Fig.11 (a) is an overhead view which shows the structure of the induction heating cooking appliance in the 3rd Embodiment of this invention, FIG.11 (b) and FIG.11 (c) are the coil holding | maintenance parts in the same embodiment FIG. Among them, FIG. 11B is a structural diagram of a coil holding portion showing an example of “heating coil non-uniform arrangement” described later, and FIG. 11C is a coil holding showing an example of “non-uniform material use” described later. FIG.

  In FIG. 11, the pan holder 101 is formed by radially arranged coil holders 102, and the center of gravity 1022 of the coil holder 102 is configured to be outside the rotation axis.

  A method for realizing the center of gravity 1022 of the coil holding portion 102 outside the rotation axis is not limited. For example, as shown in FIG. 11B, the heating coil 103 is mainly disposed outside the rotating shaft, or as shown in FIG. The average density of the outer side 102y of 102 is higher than the average density of the inner side 102x).

  FIG. 12 is a cross-sectional view showing the structure of the induction heating cooker according to the third embodiment of the present invention, showing the structure of the induction heating cooker cut based on the cutting plane position line GH of FIG. It is.

  FIG. 13: is a perspective view which shows the structure of the induction heating cooking appliance in the 3rd Embodiment of this invention.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  As shown in FIG. 12, the pan that is not a flat surface from the position of the coil holding portion 1021 at the time of storage indicated by the dotted line represents the coil holding portion 102 with the weight of the pan 200 itself, and the shape of the heating coil 103 of the coil holding portion 102 is the pan 200. It is rotated based on the rotating shaft 105 so as to match the bottom shape. When the non-planar pan 200 placed on the induction heating cooker is taken up, the center of gravity 1022 of the coil holding part 102 is outside the rotating shaft 105, so that the coil holding part 102 is based on the rotating shaft 105 by its own gravity. It automatically rotates in the direction opposite to the rotation direction at the position of the coil holding portion 1021 at the time of storage indicated by a dotted line.

  With the above operation, the coil holding part can be automatically restored, and parts such as movable means can be reduced. Furthermore, since it is not necessary to detect the pan state such as the pan shape and position, it is possible to reduce the number of detection means such as infrared sensors.

  The configuration of the coil holding part is the same as in the first embodiment of the present invention.

  As described above, the induction heating cooker according to the present invention has a simple structure that can be realized even with general industrial members, and moves the coil holding part up and down, left and right or in the rotation direction, thereby changing the shape of the heating coil to the bottom of the pan. Since it can be heated with high efficiency so as to match the shape, it can be applied not only to ordinary homes and offices but also to business uses such as restaurants.

DESCRIPTION OF SYMBOLS 100 Induction heating cooker 101 Pan receiving part 102 Coil holding part 1021 Coil holding part 1022 Coil holding part 1022 Coil holding part center of gravity 103 Heating coil 104 Detection means 105 Rotating shaft 200 Pan 201 Movable means 301 Control means 302 Manual input 901 Stabilization band 902 Fixed element

Claims (8)

A pan receiving part for holding a pan to be heated is provided, the pan receiving part is formed by a plurality of coil holding parts, and the coil holding part is provided with a heating coil so as to move freely in the vertical and horizontal directions or in the rotation direction. Constructed induction heating cooker. The induction heating cooker according to claim 1, wherein the coil holding portions are arranged concentrically. The induction heating cooker according to claim 2, further comprising a stable band, wherein the stable band stably holds a position of each heating coil of the coil holding portion. The induction heating cooker according to claim 1, wherein the coil holding portions are arranged circumferentially. The induction heating cooker according to claim 2 or 4, further comprising movable means, wherein the movable means moves the coil holding portion up and down, left and right or in a rotational direction. The induction heating cooker according to claim 5, further comprising a detection unit, wherein the detection unit detects a pan state such as a shape and a position of the pan. The induction heating cooker according to claim 4, wherein a plurality of the heating coils are arranged in the coil holding part. The induction heating cooker according to claim 4, wherein the coil holding portions are arranged radially.

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