JP5241630B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to a cooling structure for an induction heating coil incorporated in a main body of an induction heating cooker.

  The induction heating cooker creates lines of magnetic force by flowing a high-frequency current through the induction heating coil, generates eddy currents in the cooking pan disposed above the induction heating coil by the lines of magnetic force, and uses Joule heat generated at that time. The cooking pan itself generates heat.

  The induction heating cooker has a higher thermal efficiency (about 90% for the iron pan) than the heating efficiency (about 40%) of the heating cooker using gas as a heat source, but heat loss occurs and the induction heating coil generates heat. Therefore, these coolings are necessary.

  An induction heating coil incorporated in a conventional induction heating cooker is described in Patent Document 1.

  The induction heating coil is formed by winding a conductive wire having a surface coated with a heat-sealing layer into a disk shape, and heat-sealing the heat-sealing layer to integrate the conductive wires, and the integrated induction heating coil is made of resin. The induction heating coil unit is configured by being mounted on the holding table and fixed with an adhesive, and the induction heating coil unit is disposed in the main body of the induction heating cooker.

  The holding table includes an inner peripheral portion and an outer peripheral portion, and a plurality of radial ribs connecting the inner peripheral portion and the outer peripheral portion, and the outer diameter of the outer peripheral portion is slightly larger than the outer diameter of the induction heating coil. The ferrite is formed on the lower surface of the plurality of ribs to prevent the magnetic flux from leaking to the lower surface side of the holding table.

  The induction heating coil unit configured as described above is incorporated in the main body of the induction heating cooker, and cools the lower surface of the induction heating coil by blowing cooling air from the fan device also incorporated in the main body. However, the cooling air that has flowed into the lower surface of the induction heating coil hits the inner wall surface of the outer periphery of the holding base that holds the induction heating coil, and cannot pass through the induction heating coil unit. As a result, the flow becomes stagnant and the lower surface of the induction heating coil cannot be effectively cooled.

  In order to solve the problem of Patent Document 1, the invention described in Patent Document 2 has been proposed.

  The invention described in Patent Document 2 includes an induction heating coil and a heating coil base on which the induction heating coil is mounted. The heating coil base includes a central portion, an outer peripheral portion, and the central portion and the outer peripheral portion. A plurality of connecting ribs on which the induction heating coil is placed, and the height of the connecting rib is set higher than the height of the outer periphery of the induction heating coil so that the outer periphery of the induction heating coil and the heating coil base A communication hole is provided between the outer periphery and an air passage through which cooling air passes between the induction heating coil and the heating coil base.

Japanese Patent Laid-Open No. 5-29072 JP 2002-43045 A

  In the above prior art, as described above, the cooling air flowing into the lower surface of the induction heating coil from the fan device hits the inner wall surface of the outer peripheral portion of the holding table that holds the induction heating coil. It cannot pass over the induction heating coil unit, and the flow becomes stagnant on the lower surface of the induction heating coil unit, so that the lower surface of the induction heating coil cannot be effectively cooled.

  On the other hand, since the communication hole is provided between the outer periphery of the induction heating coil and the outer periphery of the heating coil base, the one described in Patent Document 2 is cooled between the induction heating coil and the heating coil base. An air passage is formed to pass the wind and cooling air flows. However, since the outer periphery of the heating coil base is formed into a ring shape with a wide flat shape, the cooling that flows from the fan device to the lower surface of the induction heating coil The air collides with the flat bottom surface of the outer periphery of the heating coil base and the flow is hindered. Again, the air cannot pass smoothly above the induction heating coil unit, and the lower surface of the induction heating coil is effectively cooled. I can't.

  Thus, the present invention solves the above-described conventional problems.

According to claim 1 of the present invention, an induction heating coil comprising a top plate disposed on the upper surface of the main body, and an induction heating coil and a resin coil base on which the induction heating coil is mounted on the upper part of the main body below the top plate. In an induction heating cooker provided with a fan device that arranges a unit and supplies cooling air to the induction heating coil unit inside the main body,
The coil base, the inner peripheral portion and the outer peripheral portion and is constituted by a plurality of radial ribs connecting the outer circumferential portion and the inner peripheral portion, the induction heating coil outer diameter of the outer peripheral portion of the coil base of larger than the outer diameter, the inclined guide portion is provided which is inclined upwardly toward the upper surface from the lower surface to the outer peripheral portion of the coil base, the induction heating by the cooling air flowing into the lower surface of the coil base from said fan device The lower surface of the coil is cooled, and the cooled cooling air is discharged upward along the inclined guide portion.

According to a second aspect of the present invention, a shield ring holding groove is integrally provided outside the outer periphery of the coil base, an annular shield ring is placed in the shield ring holding groove, and flows into the lower surface of the coil base from the fan device. After cooling the lower surface of the induction heating coil with the cooled air, the shield ring is cooled, and the cooled air is discharged upward along the inclined guide portion.

  According to claim 1 of the present invention, when the induction heating coil unit is incorporated in the main body of the induction heating cooker, and the lower surface of the induction heating coil is cooled by blowing cooling air from the fan device also incorporated in the main body, The cooling air that has flowed into the lower surface of the induction heating coil cools the entire lower surface of the induction heating coil, and then smoothly discharges upward along the inclined guide portion that is inclined upward from the lower surface toward the upper surface of the outer periphery of the coil base. As a result, the flow of cooling air does not stagnate on the lower surface of the induction heating coil unit and the flow is not obstructed, and the lower surface of the induction heating coil is efficiently cooled.

  According to the second aspect, since the inclined guide portion is formed on the outer peripheral portion of the coil base, it is not necessary to change the shape of the coil base or add parts. Can be cooled to.

  According to the third aspect, the cooling air flowing into the lower surface of the induction heating coil sufficiently cools the entire lower surface of the induction heating coil, and then the sufficient amount of the annular shield ring placed in the shield ring holding groove on the outer peripheral portion of the coil base. Then, the air is smoothly discharged upward through the exhaust outlet between the inclined guide portion and the shield ring, so that both the induction heating coil and the shield ring can be efficiently heated.

It is the perspective view of the state which removed the induction heating coil unit of the left side and rear center of the induction heating cooking appliance of this invention, and decomposed | disassembled the top plate. FIG. 2 is a cross-sectional view of FIG. 1 taken along line AA. It is a perspective view of the induction heating coil unit of this invention. It is a perspective view of the state which fractured | ruptured the induction heating coil unit of FIG. 3 in substantially half. It is sectional drawing of the state which cut | disconnected FIG. 3 by the BB line.

  Embodiments of the present invention will be described below with reference to FIGS.

  In the figure, 1 is the main body of the induction heating cooker. A top plate 2 made of heat-resistant glass is disposed on the upper surface of the main body 1. On the front left and right sides and the rear side center of the top plate 2, a placement portion 3a for displaying a position for placing an object to be heated, such as a cooking pan, is drawn. An upper surface operation unit 3b for setting and controlling the above is disposed.

  The main body 1 is mounted on a dedicated mounting table or used in a system kitchen with the top plate 2 disposed.

  Reference numeral 4 denotes an intake port, and 5 denotes an exhaust port, which are opened side by side on the rear left side and right side of the top plate 2, and communicate with the main body intake port 6 and the main body exhaust port 7 that are opened on the rear upper surface of the main body 1.

  A grill heating unit 8 is provided on the left side of the front surface of the main body 1 and grills fish, meat, gratin, and the like. Reference numeral 9 denotes a front operation unit provided on the right side of the front surface of the main body 1, which mainly sets and controls the grill heating unit 8.

  Reference numeral 10 denotes an induction heating coil, in which a conducting wire having a surface coated with a heat-sealing layer is wound in a disk shape, the heat-sealing layer is heat-sealed to integrate the conductors, and the integrated conducting wire is made of resin. The induction heating coil unit 12 is configured by placing the two on the coil base 11 and fixing them with an adhesive. In addition, although the conducting wire of the induction heating coil 10 is divided into two inward and outward in the drawing, it is not necessarily divided into two and may be integrally wound.

  The induction heating coil unit 12 is arranged on the front side left and right and the upper part of the rear center in the main body 1 so as to be positioned on the lower surface of the mounting portion 3a of the top plate 2.

  Therefore, the grill heating unit 8 is arranged on the lower surface of the left heating coil unit 12 on the front side, and the heating coil unit 12 and the grill heating unit 8 are controlled on the lower surface on the right side of the front side as shown in FIG. A control board 13 is provided, and a fan device 14 is arranged on the rear side of the control board 13 so as to be connected to the intake port 4 through the main body intake port 6.

  A part of the cooling air blown from the fan device 14 cools the control board 13 and then cools the induction heating coil unit 12 on the front side right through the air passage 15a, and the other part of the cooling air is another air passage 15b. The induction heating coil unit 12 on the left side of the front side is cooled through the main body exhaust port 7 and discharged from the exhaust port 5 to the rear upper surface of the main unit 1. In addition, about the air path of the cooling air ventilated from the fan apparatus 14, it is not limited to said air path.

  Next, details of the induction heating coil unit 12 will be described with reference to FIGS. 3, 4 and 5.

  The coil base 11 on which the induction heating coil 10 is placed has an inner peripheral part 11a, an outer peripheral part 11b having an outer diameter larger than the outer diameter of the induction heating coil 10, and a plurality of connecting the inner peripheral part 11a and the outer peripheral part 11b. The outer diameter of the outer peripheral portion 11 b is slightly larger than the outer diameter of the induction heating coil 10.

  Although not shown on the lower surface of the plurality of ribs 11c, a ferrite for suppressing leakage of magnetic flux from the induction heating coil 10 to the lower surface of the coil base 11 is attached.

  Further, 11d is an inclined guide portion provided integrally with the outer peripheral portion 11b of the coil base 11, and is inclined upward from the lower surface of the outer peripheral portion 11b toward the upper surface, and from the fan device 14 to the lower surface of the coil base 11. The air after cooling the lower surface of the induction heating coil 10 with the inflowing cooling air is guided upward along the inclined surface and discharged to the exhaust port 5 through the main body exhaust port 7.

  Reference numeral 11e denotes a shield ring holding groove, which is integrally provided with the resin coil base 11 outside the outer peripheral portion 11b of the coil base 11. An annular shield ring 16 is placed in the shield ring holding groove 11e.

  The shield ring holding groove 11e does not need to be provided over the entire circumference of the outer peripheral portion 11b of the coil base 11, and may be provided only at a plurality of locations. The shield ring 16 suppresses magnetic flux leaking from the induction heating coil 10 to the surroundings, and an aluminum material is used.

  An exhaust outlet 17 is held between the shield ring 16 and the inclined guide portion of the coil base 11 for discharging the cooled air.

  The operation of the above configuration will be described.

  The user places the cooking pan on the placement portion 3a (the placement portion on the right side on the front side in this embodiment) of the top plate 2, and operates the upper surface operation portion 3b to start cooking.

  As a result, the control board 13 outputs a control signal to the induction heating coil 10. By this control signal, the induction heating coil 10 generates high-frequency current to generate magnetic lines of force, and the magnetic lines generate eddy currents in the cooking pan disposed above the induction heating coil 10, and use the Joule heat generated at that time. Then heat the cooking pan itself.

  Simultaneously with the start of cooking, the control board 13 also outputs a control signal to the fan device 14, and the fan device 14 is driven by this control signal, and from the inlet 4 of the top plate 2 and the main body inlet 6 of the main body 1. Outside air is sucked into the main body 1 to cool the control board 13.

  Thereafter, the cooling air flows out to the lower surface of the induction heating coil unit 12 through the air passage 15a and is blown to the lower surface of the induction heating coil 10 to cool the lower surface of the induction heating coil 10. Then, the cooled air flows upward along the inclined guide portion 11d of the coil base 11 as shown by an arrow A in FIG. 5, and the shield ring 16 disposed outside the inclined guide portion 11d in the course of the flow. And is discharged upward from an exhaust outlet 17 between the shield ring 16 and the inclined guide portion 11d. The discharged air is discharged from the main body exhaust port 7 and the exhaust port 5 of the top plate 2 to the upper surface of the main body 1.

  In the present embodiment, the cooling of the induction heating coil 10 corresponding to the right side mounting portion 3a of the top plate 2 has been described. However, the induction heating corresponding to the left side mounting portion 3a of the top plate 2 is performed. The cooling of the coil 10 is the same as described above.

  As described above, according to the present embodiment, the induction heating coil unit 12 is incorporated in the main body 1 of the induction heating cooker, and cooling air is blown from the fan device 14 that is also incorporated in the main body 1 to induce induction heating. When cooling the lower surface of the coil 10, the cooling air flowing into the lower surface of the induction heating coil 10 cools the entire lower surface of the induction heating coil 10, and then upwards toward the outer peripheral portion 11 b of the coil base 11 from the lower surface toward the upper surface. In this way, the cooling air is smoothly discharged upward along the inclined guide portion 11d, so that the cooling air does not stagnate on the lower surface of the induction heating coil unit 12 and is not obstructed. The lower surface of the heating coil 10 is efficiently cooled.

  In addition, since the inclined guide portion 11d can be integrally formed on the outer peripheral portion 11b of the resin coil base 11, it is not necessary to change the shape of the coil base 11 or add parts, and the induction heating coil can be obtained by this configuration. The lower surface of 10 can be sufficiently cooled.

  Further, the cooling air that has flowed into the lower surface of the induction heating coil 10 cools the entire lower surface of the induction heating coil 10, and then the annular shield ring 16 placed in the shield ring holding groove 11 e of the outer peripheral portion 11 b of the coil base 11. After sufficiently cooling and then being smoothly discharged upward through the exhaust outlet 17 between the inclined guide portion 11d and the shield ring 16, both the induction heating coil 10 and the shield ring 16 can be efficiently heated. .

DESCRIPTION OF SYMBOLS 1 Main body 2 Top plate 4 Intake port 5 Exhaust port 10 Induction heating coil 11 Coil base 11d Inclination guide part 11e Shield ring holding groove 12 Induction heating coil unit 16 Shield ring

Claims (2)

Place the top plate on the top surface of the main body,
An induction heating coil unit composed of an induction heating coil and a resin coil base on which the induction heating coil is placed is arranged in the upper part of the main body below the top plate,
In an induction heating cooker including a fan device that supplies cooling air to the induction heating coil unit inside the main body,
The coil base, the inner peripheral portion and the outer peripheral portion and is constituted by a plurality of radial ribs connecting the outer circumferential portion and the inner peripheral portion, the induction heating coil outer diameter of the outer peripheral portion of the coil base of larger than the outer diameter, the inclined guide portion is provided which is inclined upwardly toward the upper surface from the lower surface to the outer peripheral portion of the coil base, the induction heating by the cooling air flowing into the lower surface of the coil base from said fan device An induction heating cooker characterized in that a lower surface of a coil is cooled and the cooled air after cooling is discharged upward along the inclined guide portion. A shield ring holding groove is integrally provided outside the outer periphery of the coil base , and the shield
An annular shield ring is placed in the ring holding groove, and the coil base is
The cooling air that flows into the lower surface cools the lower surface of the induction heating coil, then cools the shield ring, and discharges the cooled air upward along the inclined guide portion. Induction heating cooker.

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