JP5353738B2 - Induction heating cooker, method of attaching the same, and kitchen apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooker capable of freely setting a size of heating coils without restraining a size of an opening of a cabinet of a kitchen apparatus and freely setting a size of a heating zone for heating by mounting a pan. <P>SOLUTION: An outer enclosure 12 of the induction heating cooker is formed by a storage part 8 assembled in the opening 10 of a top plate 20, and a flange 6 extending to an outer periphery at an upper part of the storage part 8. A heating coil storage space 13 is formed on the flange 6, and parts of heating coils 2, 3 are arranged in the space 13. Thus, the heating coils can be arranged at a range wider than the size of the opening 10 in order to separate the distance between the heating coils and increase the number of heating coils, and a cooking zone can be freely designed. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an induction heating cooker used by being incorporated in a cabinet of a kitchen apparatus, and to a kitchen apparatus incorporating the induction heating cooker.

  Conventionally, this type of induction heating cooker is composed of a flat plate made of a non-metal such as heat-resistant glass and an accommodating portion provided at the lower part of the plate (see, for example, Patent Document 1).

  10A is a cross-sectional view of a conventional induction heating cooker, and FIG. 10B is a plan view of the conventional induction heating cooker, which is in a state of being incorporated in a cabinet of a kitchen apparatus. FIG. 11 is an internal perspective view of a conventional induction heating cooker, and FIG. 12 is an internal perspective view of another conventional induction heating cooker.

  As shown in FIG. 10, it is composed of a flat plate 41 made of a nonmetal such as heat-resistant glass, and an accommodating portion 48 provided at the lower part of the plate 41. A heating source such as a heating coil for induction heating of a pan placed on the plate 41 or an electric heater for resistance heating of the pan is placed in the accommodating portion 48 through a space of about 5 mm from the back surface of the plate 41. Are arranged.

  As shown in FIG. 10 and FIG. 11, the specific arrangement of these heating sources is such that a left heating coil 42 and a right heating coil 43 are disposed on the left and right sides of the front, respectively, In the center, a middle heating coil 50 for performing induction heating or a radiant heater for performing resistance heating is disposed.

  A roaster 47 that cooks grilled fish or the like is disposed below the left heating coil 42 in the housing portion 48, and an electric resistance heater, grill, and saucer are disposed within the roaster 47.

  In addition, an inverter device 49 that supplies high-frequency power to the heating coils 42 and 43 is disposed in the housing portion 48 on the right side of the roaster 47, and the inverter device 49 is an inverter corresponding to each of the heating coils 42 and 43. The circuit boards are arranged in the vertical direction.

  Further, as shown in FIG. 10, the induction heating cooker inserts a storage portion 48 through an opening 46 provided in a top plate 44 of a cabinet 45 of the kitchen device, and the storage portion 48 is inserted into the cabinet 45 of the kitchen device. The induction heating cooker is incorporated in the cabinet 45 of the kitchen apparatus so that the periphery of the plate 41 is placed on the top plate 44 of the cabinet 45 of the kitchen apparatus.

  The opening 46 is provided in order to incorporate an induction heating cooker or gas stove device into the cabinet. Manufacturers of kitchen equipment make the size of the opening 46 substantially the same, so that the induction heating cooker Manufacturers or gas stove equipment manufacturers can be incorporated into the cabinets of various manufacturers of kitchen equipment without changing the outer dimensions of the outer shell.

  In this way, even when an induction heating cooker or gas stove device is purchased and incorporated, the products sold by the manufacturers of the induction heating cooker or gas stove device can be freely selected, and the kitchen apparatus can be selected. Only induction heating cookers or gas stove devices that have a shorter product life increase the degree of freedom of recombination.

JP 2001-196153 A

  However, in the conventional configuration, the size of the accommodating portion 48 is determined by the size of the opening 46 of the cabinet 45 of the kitchen apparatus (in Japan, the width of the opening 46 is about 560 mm). The size and layout of the heating coils 42, 43, and 50 disposed inside are also restricted.

  As a result, since it becomes difficult to mount a heating coil having a large diameter, there arises a problem that it becomes difficult to heat a pan having a large pot bottom diameter with a good heating distribution. For example, when the lateral width of the accommodating portion 48 is equal to the lateral width of the opening 46, the left and right heating coils 42, 43 are disposed in the accommodating portion 48, so the diameter of the heating coils 42, 43 that is theoretically maximum. 560mm / 2 = 280mm, and it becomes difficult to uniformly heat the entire pan bottom for a large pan having a pan bottom larger than this diameter, and a good heating portion cannot be obtained.

  Also, when a plurality of pans having a large pot bottom diameter (when the pot bottom diameter is 260 mm or more, the pan circumference is 300 mm or more) are arranged and heated, the center of the pot bottom is centered on the heating coils 42 and 43 as described above. When placed together, the pans hit each other and had the problem of poor cooking workability.

  Further, since the size of the heating coil is restricted, a ring-shaped magnetic shielding means 61 arranged near the outer periphery of the heating coils 52, 60, 53 as shown in FIG. In the case of suppressing the heating, the size of the heating coil has to be reduced, and there arises a problem that it becomes more difficult to efficiently heat a large pan.

  On the other hand, in FIG. 10, when a gap is provided between the plate 41 and the top plate 44 in order to increase the heating coil diameter, and the heating coils 42 and 43 are arranged in the gap, the heating coils 42 and 43 themselves are baked. Since the heat is generated to the extent that it can be cut, the cabinet 45 is prevented from being deteriorated by heat, and the heating coils 42 and 43 are cooled by raising the height between the plate 41 and the top plate 44 in order to keep the heating coils 42 and 43 at a temperature at which there is no problem in operation. There was a problem that it was necessary and unusable.

  The present invention solves the above-mentioned conventional problem, and is not limited by the size of the opening of the cabinet of the kitchen device, and the size of the heating coil can be freely set, and the pan is placed and heated. An object of the present invention is to provide an induction heating cooker in which the size of the heating region can be freely set, and to provide a method for attaching the induction cooking device and a kitchen apparatus using the same.

In order to solve the above-described conventional problems, an induction heating cooker according to the present invention induction-heats an outer shell of an induction heating cooker, a plate covering an upper portion of the outer shell, and an object to be heated placed on the plate. A heating coil, an inverter device for supplying a high-frequency current to the heating coil, and a heating coil temperature detection means for detecting the temperature of the heating coil, the outer shell being inserted into an opening of a top plate of a cabinet of a kitchen device The heating coil is disposed in the outer shell below the plate, and the housing coil is configured to extend from the housing portion to the outer peripheral side and to be mounted on the top plate of the cabinet. The inverter device is disposed in the housing portion, and a heating coil housing space for housing a part or all of the heating coil is formed between the flange and the plate. A part of the heating coil is positioned in the heating coil housing space when the heating coil is disposed in the outer shell, and the heating coil temperature detecting means is a part of the heating coil housed in the heating coil housing space. The temperature is detected.

  As a result, a heating coil housing space is formed between the flange placed on the top plate and the plate, so that a range wider than the opening can be obtained without changing the size of the opening of the cabinet of the kitchen apparatus. The heating coil can be arranged on the plate, and the degree of freedom in arrangement is also increased. As a result, the size of the plate, that is, the heating region can be freely set.

  For example, since the space between the heating coil and the heating coil can be widened, even in simultaneous cooking with a plurality of pans, adjacent pans can be used without colliding with each other, or the diameter of the heating coil can be increased so that the diameter of the pan bottom can be increased. Even large pots can be heated without deteriorating the heating distribution, and an induction heating cooker with good usability and heating distribution can be realized.

  Furthermore, since the heating coil housing space is formed between the flange on the top plate and the plate, the upper surface of the plate becomes higher than the top plate by the height of the heating coil housing space, but the heating coil housing means accommodates the heating coil. In order to detect the temperature of the heating coil housed in the space, it is possible to control the amount of high-frequency current supplied by the inverter device so that the heating coil itself does not burn out or the cabinet is deteriorated by heat. The coil housing space can be made thin because it is sufficient to place only the heating coil, which hinders the workability of placing the pan on the plate or the cooking workability of moving the pan on the plate for cooking. There is nothing.

  In the induction heating cooker of the present invention, since the heating coil housing space is formed between the flange and the plate placed on the top plate, the size of the opening of the cabinet is not limited, The size and arrangement and the size of the heating area can be freely set, so that the heating efficiency can be improved and the cooking workability can be improved.

(A) Sectional view of induction heating cooker in Embodiment 1 of the present invention (b) Plan view of induction heating cooker in Embodiment 1 of the present invention (A) AA sectional view of the heating coil of the induction heating cooker in Embodiment 1 of the present invention (b) Plan view of the heating coil of the induction heating cooker in Embodiment 1 of the present invention (A) BB sectional drawing of other embodiment of the heating coil of the induction heating cooking appliance in Embodiment 1 of this invention (b) Other heating coil of the induction heating cooking appliance in Embodiment 1 of this invention Plan view of the embodiment The block diagram which shows the structure of the induction heating cooking appliance in Embodiment 1 of this invention. The graph which shows the processing content of the induction heating cooking appliance in Embodiment 1 of this invention The top view which shows other embodiment of the heating coil temperature detection means of the induction heating cooking appliance in Embodiment 1 of this invention. (A) Sectional view of induction heating cooker in Embodiment 2 of the present invention (b) Plan view of induction heating cooker in Embodiment 2 of the present invention (A) Sectional view of induction heating cooker in Embodiment 3 of the present invention (b) Plan view of induction heating cooker in Embodiment 3 of the present invention Sectional drawing which shows the kitchen counter incorporation state of the induction heating cooking appliance in Embodiment 4 of this invention (A) Sectional view of a conventional induction heating cooker (b) Plan view of a conventional induction heating cooker Internal perspective view of a conventional induction heating cooker Internal perspective view of another conventional induction heating cooker

  1st invention supplies the high frequency current to the outer shell of an induction heating cooking appliance, the plate which covers the upper part of the said outer shell, the heating coil which carries out the induction heating of the to-be-heated material mounted on the said plate, and the said heating coil And an inverter device, wherein the outer shell is inserted into an opening portion of the top plate of the cabinet of the kitchen device, and extends from the housing portion to the outer peripheral side, and is placed on the top plate of the cabinet. A heating coil housing space for housing a part or all of the heating coil between the flange and the plate. The heating coil is configured to detect a temperature of a part of the heating coil housed in the heating coil housing space while arranging a part of the heating coil in the heating coil housing space. And a le temperature detecting means, the heating coil temperature detecting means is one that was reduced or stops the high-frequency current supplied by the inverter device when detecting a predetermined temperature or more.

  As a result, a heating coil housing space is formed between the flange placed on the top plate and the plate, so that a range wider than the opening can be obtained without changing the size of the opening of the cabinet of the kitchen apparatus. Since the heating coil can be arranged on the plate and the degree of freedom in arrangement is increased, the size of the plate, that is, the heating region can be set freely.

  In addition, the upper surface of the plate is higher than the top plate by the height of the heating coil housing space, but it is sufficient to place only the heating coil in the heating coil housing space, so that the thickness can be reduced and a pan is placed on the plate. There is no hindrance to the workability of placing or moving the pot on the plate for cooking.

  The heating coil is different from a burner such as a gas stove, and can be designed to be thin. The heating coil has a wire diameter, the number of windings, a winding method, a twisting method, a heating coil diameter (outer diameter), etc. so that a predetermined inductance L necessary for induction heating can be obtained. Is determined.

  For example, since the inductance L increases in proportion to the area of the heating coil, if a heating coil having a large diameter is used, a predetermined inductance L can be obtained even with a thin heating coil, thereby realizing a thin heating coil housing space. Is possible.

  If the height dimension of the heating coil housing space can be reduced, the step generated between the top plate upper surface and the plate upper surface can be reduced, and the cooking workability is not hindered.

  According to a second aspect of the invention, in particular, the heating coil of the first aspect of the invention comprises an electric wire for flowing a high-frequency current and a high-permeability magnetic body for converging a magnetic field generated by the high-frequency current. The efficiency of induction heating to the pan can be increased by disposing the material on the side opposite to the electric wire when viewed from the high magnetic permeability magnetic material.

  In the third invention, in particular, the magnetic material having a high magnetic permeability according to the second invention is made of ferrite, so that the leakage magnetic flux is reduced and the heat generation of the magnetic material itself can be prevented.

  In particular, the fourth invention is an inverter for detecting a portion where the heating coil is likely to become high temperature by arranging the heating coil temperature detecting means of any one of the first to third inventions in the heating coil housing space. The high-frequency current supplied by the apparatus can be accurately controlled.

In the fifth invention, in particular, the heating coil temperature detecting means according to any one of the first to third inventions is arranged in the housing portion, thereby increasing the degree of freedom for the wiring of the heating coil temperature detecting means. Assemblability can be improved.

  6th invention is equipped with the opening part provided in the top plate of the cabinet, the said cabinet, and the induction heating cooking appliance of any one invention of 1st-5th, The accommodating part of the said induction heating cooking appliance is said By being inserted into the opening and using a kitchen apparatus in which the flange of the induction heating cooker is placed on the top plate, the size of the heating area that is the plate and the size, number, and arrangement of the heating coils are limited. Without receiving, an induction heating cooker can be attached in the opening provided in the top plate of the existing cabinet, and a kitchen apparatus that matches the cooking style of the individual can be provided.

  7th invention inserts the accommodating part of the induction heating cooking appliance of any one of 1st-6th invention in the opening part of the top plate of the cabinet of a kitchen apparatus with the flange of the said induction heating cooking appliance, The induction heating cooker is mounted by placing the flange on the top plate so that a seal is positioned between the outer periphery of the flange and the top plate. With this mounting method, holding the large flange by hand and inserting the receiving part into the opening makes it easier to use the flange as a handle. On the other hand, as the size of the flange increases, the gap between the top plate top surface and the flange bottom surface becomes larger. Although it tends to occur, if the flange is placed on the top plate, the seal is interposed between the two, so that filling the gap with the seal is completed in a series of operations. And it can prevent that the blown-up soup from a pot permeates from the clearance gap between a flange and a top plate.

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

(Embodiment 1)
FIG. 1A is a cross-sectional view of the induction heating cooker according to the first embodiment of the present invention, and FIG. 1B is a plan view of the induction heating cooker according to the first embodiment of the present invention. The structure of the induction heating cooking appliance integrated in a cabinet is shown.

  In FIG. 1, an opening 10 is provided in a top plate 20 of a cabinet (hereinafter referred to as kitchen counter) 9 of a kitchen apparatus, and an accommodating portion 8 constituting a part of an outer shell 12 of an induction heating cooker is inserted. .

  The upper portion of the outer shell 12 of the induction heating cooker is covered with a flat plate 1 made of a nonmetal such as heat resistant glass. The outer shell 12 includes a flange 6 that is placed between the plate 1 and the top plate 20 of the kitchen counter 9, and a housing portion 8 that is disposed below the flange 6.

  The flange 6 extends from the upper end portion of the housing portion 8 toward the outer peripheral direction (horizontal direction), and is placed on the top plate 20 of the outer peripheral portion of the opening 10.

  In the outer shell 12, a high-frequency magnetic field is prevented from moving toward the winding 25 and the flange side for induction heating of a pan or the like disposed on the plate 1 through a space of about 5 mm from the back surface of the plate 1. A left heating coil 2 and a right heating coil 3 made of a magnetic body 27 for magnetic demagnetization are arranged, and each heating coil has at least a part of the outer diameter formed between the flange 6 and the plate 1. It arrange | positions so that it may be located in the coil accommodation space 13. FIG.

  Therefore, the left part heating coil 2 and the right part heating coil 3 are located above the top plate 20 of the kitchen counter 9, a part of the outer diameter is on the top plate 20 of the kitchen counter 9, and the remaining part is an opening. 10 is disposed in the accommodating portion 8 located in the inside.

  The left part heating coil 2 and the right part heating coil 3 are each provided with a heating coil temperature detecting means 7 for measuring the temperature of the heating coil. Within the housing portion 8 of the outer shell 12, a roaster 5 for cooking grilled fish or the like using an electric heater is disposed below the left heating coil 2, and below the right heating coil 3, the left heating coil 2 is disposed. And the inverter apparatus 4 which supplies high frequency electric power to the right part heating coil 3 is arrange | positioned.

  The outer shell 12 is formed of a metal plate, and the housing portion 8 and the flange 6 are integrally formed, and has a function as a rigid body capable of supporting heavy objects such as the heating coils 2 and 3. At this time, the magnetic shield 27 is provided on the heating coils 2 and 3 to cope with a high-frequency magnetic field directed downward from the heating coils 2 and 3. Since the high-frequency magnetic field toward the surface cannot be changed by 100%, the flange 6 is preferably made of a non-magnetic material in order to suppress the adverse effect of heat on the top plate 20 due to induction heating.

  In addition, in this Embodiment, although comprised by the two heating coils arrange | positioned at the left and right of the left part heating coil 2 and the right part heating coil 3, it is located on the flange 6 on the top plate 20 of the kitchen counter 9 If it is the structure which makes a heating coil position in the heating coil accommodation space 13 to perform, it will not specifically limit.

  Further, as the size of the heating coil is increased, the heating coil housing space 13 may be formed on a flange extending in the front-rear direction, and the left and right flanges 6 are greatly extended in the outer peripheral direction of the opening 10. The heating coil housing space may be formed so as to accommodate the entire heating coil. In short, it can be freely set according to the heating region by the number, size, arrangement, etc. of the heating coils. You can do it.

  Next, details of the heating coils 2 and 3 will be described. FIG. 2A is a cross-sectional view of the heating coil of the induction heating cooker according to the first embodiment of the present invention taken along the line AA. FIG. 2B is a heating coil of the induction heating cooking device of the first embodiment of the present invention. FIG.

  2A and 2B, the donut-shaped winding 25 is fixed on a support plate 26 made of an electrically insulating material. The winding 25 is a collective wire in which a plurality of strands in which the surface of a copper wire or aluminum wire with low electrical resistance and good thermal conductivity is coated with an insulating material is bundled, and the bundled bundle wire is wound into a donut shape. Is formed.

  Since the high-frequency current of 20 kHz or more is supplied from the inverter device 4 to the wire diameter of the copper wire or aluminum wire used for the winding, the skin resistance is reduced by setting it to 0.4 mm or less.

  Since a high-frequency magnetic field is generated from the winding 25, the lower surface of the support plate 26 is below the winding 25 in order to prevent the high-frequency magnetic field going downward from the winding 25 from moving toward the flange 6 described above. In addition, a plurality of rod-shaped magnetic body for magnetic shielding (specifically, ferrite cores) 27 are arranged radially from the center side of the donut-shaped support plate 26.

  This magnetic-shielding magnetic body 27 can change the direction of the high-frequency magnetic field directed downward from the winding 25 to prevent the high-frequency magnetic field from moving toward the flange 6 located below the magnetic-shielding magnetic body 27.

  Therefore, as described above, the flange 6 can be suppressed from being induction-heated by the high-frequency magnetic field directed downward from the winding 25 even if it is made of a metal plate in terms of rigidity and strength.

  The heating coil described above has a height H1 obtained by adding the heights of the winding 25, the support plate 26, and the magnetic-shielding magnetic body 27. However, the heating coil itself is preferably thinned so that the height direction is lowered. The details of the reason for the thinning of the heating coil are as follows. By suppressing the height of the heating coil housing space 13 to a low level, the height dimension H from the top 20 to the top of the plate 1 is kept low. This is because the level difference between the two can be reduced, the heated object such as a pan can be easily moved from the plate 1, and the usability can be improved.

  Next, the detail regarding thickness reduction of a heating coil is demonstrated. FIG. 3A is a cross-sectional view BB of another embodiment of the heating coil of the induction heating cooker according to the first embodiment of the present invention, and FIG. 3B is the induction heating according to the first embodiment of the present invention. The top view of other embodiment of the heating coil of a cooking appliance is shown.

  3A and 3B, a member different from FIG. 2 is a donut-shaped support plate 28. A recess for accommodating the rod-shaped magnetic shield 29 is formed on the lower surface side of the support plate 28, and the magnetic shield 29 is embedded in the recess.

  As described above, the magnetic shield 29 and the support plate 28 overlap each other in the height direction, so that the height H2 of the winding 25, the support plate 28, and the magnetic shield 29 is reduced. This will contribute to the reduction in thickness.

  FIG. 3 discloses a technique for suppressing the height dimension of the support plate 28 and the magnetic-shielding magnetic body 29 constituting the heating coil, but it is also conceivable to make the winding 25 of the heating coil thinner.

  Since the winding 25 of the heating coil is formed by winding an assembly wire in which a plurality of strands are bundled as described above, the inductance L of the heating coil is the number of windings of the assembly wire of the winding 25 (the number of turns). ) And the diameter of the heating coil, there is a formula of inductance L∝ of the heating coil (diameter of the heating coil) × (number of turns) 2.

  Therefore, since the inductance L of the heating coil increases as the diameter of the heating coil is increased, if the cross-sectional shape of the collective line of the winding 25 is crushed from a circle to an ellipse (or a quadrangle) and wound, the collective line is turned in the same turn. If it is a number, the diameter of the heating coil increases as the diameter increases.

  Therefore, when using a flat assembly wire that increases the diameter of the heating coil, the number of turns may be adjusted to reduce the number of turns in order to ensure the required inductance L. The number of turns is proportional to the square from the above formula. Therefore, if the inductance L is made constant, the number of turns can be reduced within a range in which the cross-sectional shape is larger than the diameter of the heating coil of the circular assembly wire.

  Thus, crushing the assembly line of the winding 25 into a flat shape can be easily processed, and the thickness of the heating coil (height of the assembly line) can be reduced by the crushing, and the heating coil can be made thinner. It becomes possible.

  Next, the heating coil temperature detection means 7 will be described. FIG. 4 is a block diagram showing the configuration of the induction heating cooker according to the first embodiment of the present invention.

  In FIG. 4, the heating coil temperature detecting means 7 prevents the heating coils 2 and 3 from being burned out and the kitchen counter 9 is deteriorated by heat. It arrange | positions in the space 13 and controls the high frequency current amount supplied with the inverter apparatus 4 according to the temperature of the left part heating coil 2 or the right part heating coil 3. FIG.

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

  The user of the induction heating cooker places an object to be heated such as a pan at a predetermined position on the plate 1 (a position immediately above the heating coil having strong magnetic coupling with the heating coils 2 and 3 in the outer shell 12). The heated object is induction-heated by instructing the heating coils 2 and 3 to supply a high-frequency current from the inverter device 4 to the heating coils 2 and 3.

  When the user gives an instruction to start heating, a high-frequency current from the inverter device 4 is supplied to the heating coils 2 and 3, and a high-frequency magnetic field generated from the heating coils 2 and 3 is supplied to the object to be heated by this high-frequency current. .

  Due to the high frequency magnetic field supplied to the object to be heated, an eddy current is generated in the surface layer portion of the object to be heated such as a pan, and heat is generated by the eddy current and the high frequency resistance of the object to be heated. Using this heat generation (induction heating), the user performs various types of cooking.

  In order to perform the induction heating efficiently, it is important to improve the magnetic coupling between the heating coils 2 and 3 and the object to be heated such as a pan. Therefore, the outer diameter of the heating coils 2 and 3 and the heated part Are designed to have the same outer diameter (eg, pan bottom diameter).

  In the present embodiment, the left heating coil 2 and the right heating coil 3 can be positioned in the heating coil housing space 13 formed on the left and right flanges 6, regardless of the size of the housing portion 8. The size and arrangement of the heating coils 2 and 3 can be determined.

  Therefore, even when a plurality of objects to be heated are placed on the plate 1, it is possible to increase the distance between the heating coils 2 and 3 so that the objects to be heated such as a pot do not hit each other.

  Moreover, since the outer diameter of the heating coils 2 and 3 is not influenced by the magnitude | size of the accommodating part 8, it can set to the outer diameter matched with the to-be-heated object with a large pot bottom diameter. For example, when the heating coils 2 and 3 having an outer diameter of about 180 to 200 mm used in the conventional configuration are used, the distance between the heating coils 2 and 3 can be widened while maintaining the size of the outer diameter. It becomes possible.

  Alternatively, even if the outer diameters of the heating coils 2 and 3 are increased to 200 mm or more, the distance between the heating coils 2 and 3 is not reduced, and a heated object having a large pot bottom diameter can be efficiently heated.

  Further, as shown in the present embodiment, both the left heating coil 2 and the right heating coil 3 are arranged in the heating coil housing space 13 on the flange 6, thereby widening the distance between the heating coils 2 and 3. It can also be arranged easily.

  Further, in order to suppress the leakage magnetic field from the heating coils 2 and 3, the heating coils 2 and 3 are provided with a magnetic shielding means 11 in which a non-magnetic metal such as aluminum is ring-shaped around the outer periphery of the heating coils 2 and 3. Is done.

  This is a magnetic shield that is a ring-shaped non-magnetic metal disposed in the vicinity of the heating coils 2 and 3 with respect to the magnetic field leaked to the outside without being absorbed by the heated object among the magnetic fields generated from the heating coils 2 and 3. An effect is obtained by generating an induced current from the heating coils 2 and 3 in the means 11, generating a magnetic field opposite to the leakage magnetization from the magnetic-shielding means 11 by the induced current, and canceling each other.

  For this reason, it is desirable that the magnetic shield means 11 has a larger cross-sectional area so that its own heat generation is also smaller. On the other hand, if it is too close to the heating coils 2 and 3, the canceling effect is too great and the heating efficiency is deteriorated.

  Here, in the configuration of the present embodiment, the size of the outer diameter of the heating coils 2 and 3 is not affected by the accommodating portion 8, so that there are fewer restrictions on the shape and position of the magnetic shield means 11, It is possible to adopt a configuration with high efficiency and good magnetic shielding performance.

  On the other hand, as for the heating coils 2 and 3 arrange | positioned in the heating coil accommodation space 13 on the flange 6, it is desirable that 1/2 or more of the outer diameter is located in an accommodating part. This is because the height dimension of the heating coil housing space 13 is kept small, so that it is difficult for the cooling air to reach part of the heating coils 2 and 3 located in that portion.

  This cooling air is generated by a cooling fan (not shown) disposed in the housing portion 8 to forcibly cool the inverter device (including heat generating components such as switching elements) 4 in the housing portion 8.

  Although the cooling air after forcibly cooling the inverter device 4 or a part of the cooling air from the cooling fan is branched and the heating coils 2 and 3 are cooled, the heating coil housing space 13 is high as described above. Since the dimensions are small and wide in the front-rear and left-right directions, the ventilation resistance in the heating coil housing space 13 is large and the cooling air from the housing portion 8 is difficult to reach, but according to our cooling design related to the heating coil The windings of the heating coils 2 and 3 are usually made of a material having good thermal conductivity such as a copper wire or an aluminum wire, so that the heating coils 2 and 3 located in the heating coil housing space 13 Some are located in the storage unit 8 and can be cooled by transferring heat to other parts of the heating coils 2 and 3 to which the cooling air hits, especially from our cooling design experience. Half of the outer diameter of coils 2 and 3 Part of the heating coil 2, 3 of the heating coil housing space 13 if cooling or more, it is possible to obtain sufficient cooling performance.

  However, when the roaster 5 is used and the cooling air itself is heated, it becomes difficult to obtain sufficient cooling performance. Therefore, the temperature of the heating coils 2 and 3 is detected by the heating coil temperature detecting means 7 as shown in the graph showing the processing content of the induction heating cooker in the first embodiment of the present invention in FIG. When T0 or more is detected, the amount of high-frequency current supplied by the inverter device 4 can be reduced to suppress heat generation by the heating coils 2 and 3.

  Note that the amount of decrease in the amount of high-frequency current when the predetermined temperature T0 and the predetermined temperature T0 or higher are detected is experimentally determined in advance as an optimal value.

  Further, in the present embodiment, the heating coil temperature detecting means 7 is disposed in the heating coil housing space 13, but the same effect can be obtained even if it is disposed in the housing portion 8. This is because the windings of the heating coils 2 and 3 are made of a material having good heat conduction as a main raw material, so that heat can be sufficiently transmitted to the portion located in the housing portion 8. Furthermore, in this case, it is possible to increase the degree of freedom with respect to the wiring and improve the assemblability.

  In addition, since the cooling air for cooling the heating coils 2 and 3 is discharged | emitted from back in order to avoid that a user hits a direct wind, the heating coils 2 and 3 are hotter in the back rather than the front. Tend. Therefore, it is desirable to arrange the heating coil temperature detecting means 7 behind the heating coils 2 and 3 as shown in FIG.

(Embodiment 2)
FIG. 7A is a cross-sectional view of the induction heating cooker according to the second embodiment of the present invention, and FIG. 7B is a plan view of the induction heating cooker according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the same structure part as Embodiment 1, and the detailed description is abbreviate | omitted.

  In FIG. 7, in the top plate 20 of the kitchen counter 9, the periphery of the opening 10 is recessed so that the flange 6 of the outer shell 12 is placed on the recess 32 around the opening 10. Further, the depth of the recess 32 is set so that the heating coil housing space 13 is accommodated and the upper surface of the plate 1 is flush with the upper surface of the top plate 20.

  In the configuration of the present embodiment, although the existing opening 10 cannot be used as it is, it is only necessary to process the kitchen counter 9 slightly, there is no step between the plate 1 and the top plate 20 of the kitchen counter 9, and a pot or the like. An effect of easily moving the object to be heated can be obtained.

  In the present embodiment, the depth of the recess 32 is set so that the upper surface of the plate 1 is flush with the upper surface of the top plate 20, but the heating coil housing space 13 can be set low in the first place. Even if the depth is appropriately set according to the ease of operation, the step between the upper surface of the plate 1 and the upper surface of the top plate 20 can be reliably reduced by the depth of the recess 32, so that the step is low. Only the object to be heated, such as a pan, can be moved easily.

(Embodiment 3)
FIG. 8A is a cross-sectional view of the induction heating cooker in the third embodiment of the present invention, and FIG. 8B is a plan view of the induction heating cooker in the third embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the same structure part as each said embodiment, and the detailed description is abbreviate | omitted.

  In FIG. 8, the difference between the configuration of the third embodiment and the configuration of the first embodiment is that a middle heating coil 14 is arranged between the left heating coil 2 and the right heating coil 3, and three heatings are performed. Coils 2, 3, and 14 are arranged in a substantially horizontal row.

  In this configuration, since all the heating coils 2, 3, 14 are arranged in a substantially horizontal row, if the object to be heated is placed on each heating coil 2, 3, 14, in order to confirm its contents The object to be heated on any heating coil can be confirmed without taking an unreasonable posture as compared with the case of looking at the object to be heated on the heating coil arranged in the center back as in the prior art.

  Further, in the configuration of the present embodiment, a part of the heating coil is disposed on the top plate 20 of the kitchen counter 9 outside the opening 10, so that even if the heating coil has the same shape as the conventional heating The distance between the coils can be set, and the handles of the pots to be heated are less likely to hit each other, so that the usability can be improved.

  In addition, by making the outer diameters of the left heating coil 2 and the right heating coil 3 arranged on the left and right larger than the outer diameter of the middle heating coil 14 arranged in the center, the heated object such as a pot having two large pot bottom diameters is used. When using a thing, it can cook so that a to-be-heated material may not mutually hit.

  Or the outside diameter of the left part heating coil 2 and the right part heating coil 3 can be enlarged while keeping the distance between the heating coils equivalent to the conventional one, and a heated object such as a pan having a larger bottom diameter than the conventional one. It becomes possible to heat.

Further, by increasing the rated output of the inverter device 4 that supplies the high-frequency current to the left heating coil 2 and the right heating coil 3 and the rated output of the inverter device 4 that supplies the high-frequency current to the middle heating coil 14, Since a plurality of objects to be heated can be cooked with a high heating power in a wide place, particularly a heating object with a large pan bottom diameter can be simultaneously cooked with a high heating power, and the usability is improved.

  Further, by providing the middle heating coil 14 with a small rated output, it is possible to reduce the parts of the inverter device 4 that supplies power to the middle heating coil 14, and to ensure a wide space in the housing portion 8 while being inexpensive. Can be adopted.

  In addition, when all of the plurality of heating coils 2, 3, and 14 are operated, the total power is limited, so that it becomes practical by giving a difference in the rated output.

(Embodiment 4)
FIG. 9: is sectional drawing which shows the kitchen counter incorporation state of the induction heating cooking appliance in the 4th Embodiment of this invention. In addition, the same code | symbol is attached | subjected about the same component as said each embodiment, and the detailed description is abbreviate | omitted.

  In FIG. 9, the kitchen counter 9, the opening part 10 provided in the top plate 20 of the kitchen counter 9, the induction heating cooker which has the outer shell 12 which has the accommodating part 8 and the flange 6, and the accommodating part of an induction heating cooker 8 is inserted into the opening 10 as indicated by the arrow, and the kitchen 6 is configured to place the flange 6 of the induction heating cooker on the top plate 20. The size and heating of the plate 1 covering the upper part of the outer shell 12 An induction heating cooker can be installed in the opening 10 provided in the top plate 20 of the existing kitchen counter 9 without being restricted by the size, number, and arrangement of the coils 2 and 3. A matched kitchen device can be provided.

  For example, when cooking multiple pans with a large pan bottom diameter at the same time, provide a heating area where multiple large heating coils are placed, and conversely, a pan with a large pan bottom diameter is less frequently used. In the case of simultaneous use, the induction heating cooker shown in the first embodiment is attached to improve the operability of the pan, and it is possible to provide a kitchen apparatus that makes effective use of an empty space on the front side.

  Further, the housing portion 8 of the outer shell 12 is inserted into the opening 10 of the top plate 20 as indicated by the arrow with the flange 6 and then attached to the outer peripheral side of the lower surface of the flange 6 (this embodiment) When the flange 6 is placed on the top plate 20 around the opening 10, the induction heating cooker in which the seal member 35 is located between the flange 6 and the top surface of the top plate 20 is attached. A method can be provided.

  According to this attachment method, since the holding portion 8 is inserted into the opening 10 while holding the large flange 6 by hand, the flange 6 can be easily used as a handle. A gap between the upper surface and the lower surface of the flange 6 is likely to occur, but if the flange 6 is placed on the top plate 20, the seal member 35 is interposed between the two, so a series of operations can be performed by filling the gap with a seal. It will end at.

  And it can prevent that the blown-up juice from to-be-heated objects, such as a pot, penetrate | invades from the clearance gap between the flange 6 and the top plate 20. FIG.

  The induction heating cooker of the present invention is not limited by the size of the opening provided in the cabinet of the kitchen device, and can freely set the size and arrangement of the heating coil and the size of the heating area. Since efficiency can be improved and cooking workability can be improved, it is effective for uses such as an induction heating cooker incorporated in a kitchen apparatus and a kitchen apparatus incorporating the induction heating cooker.

1 plate 2 left heating coil (heating coil)
3 Right heating coil (heating coil)
4 Inverter device 6 Flange 7 Heating coil temperature detection means 8 Housing 9 Kitchen counter (kitchen cabinet)
DESCRIPTION OF SYMBOLS 10 Opening part 11 Magnetic-shield means 12 Outer shell 13 Heating coil accommodation space 14 Central thermal coil 20 Top plate 27 Magnetic body for magnetic-shielding (magnetic body of high permeability)
28 Support plate 35 Seal member

Claims (7)

An outer shell of the induction heating cooker, a plate that covers the upper portion of the outer shell, a heating coil that induction-heats an object to be heated placed on the plate, and an inverter device that supplies a high-frequency current to the heating coil, The outer shell is constituted by a housing part that is inserted into the opening of the top plate of the cabinet of the kitchen apparatus, and a flange that extends from the housing part to the outer peripheral side and is placed on the top plate of the cabinet, The heating coil is arranged in the outer part below the plate, and a heating coil housing space for housing a part or all of the heating coil is formed between the flange and the plate, and a part of the heating coil Is disposed in the heating coil housing space, and the heating coil temperature detecting means detects the temperature of a part of the heating coil housed in the heating coil housing space. The provided, the induction heating cooker reduce or stop the high-frequency current supplied by the inverter device when the heating coil temperature detecting means detects a predetermined temperature or more. The heating coil is composed of an electric wire for passing a high-frequency current and a high-permeability magnetic body for converging a magnetic field generated by the high-frequency current, and the magnetic shield is viewed from the high-permeability magnetic body. The induction heating cooker according to claim 1, wherein the induction heating cooker is disposed on a side opposite to the first side. The induction heating cooker according to claim 2, wherein the magnetic material having high permeability is ferrite. The induction heating cooker according to any one of claims 1 to 3, wherein the heating coil temperature detecting means is arranged in the heating coil housing space. The induction heating cooker according to any one of claims 1 to 3, wherein the heating coil temperature detection means is arranged in the housing portion. A cabinet, an opening provided in the top plate of the cabinet, and the induction heating cooker according to any one of claims 1 to 5, wherein a housing portion of the induction heating cooker is inserted into the opening. And the kitchen apparatus which mounts the flange of the said induction heating cooking appliance on the said top plate. The housing portion of the induction heating cooker according to any one of claims 1 to 6 is inserted into the opening of the top plate of the cabinet of the kitchen apparatus with the flange of the induction heating cooker, and the outer periphery of the flange A method of attaching the induction heating cooker, wherein the flange is placed on the top plate so that a seal is positioned between the top plate and the top plate.

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