JP2008059982A - Induction-heating cooking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction-heating cooking device which can ensure a sufficient cooling airflow for heating coils even if the heating coils are installed in the back of a main body. <P>SOLUTION: One of the plurality of the heating coils 18, 20, 22 is arranged in the back inside the main body 2. An extending portion 28a extending above a fan cover 44 is formed on a coil base 28 mounting the heating coil 22. An airflow path 68 is formed in the extending portion 28a, whereby the heating coil 22 is configured to be cooled by sending air discharged from an air intake fan 40 through the airflow path 68 toward the heating coil 22. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an induction heating cooker used by being incorporated in a system kitchen or the like.

  2. Description of the Related Art Conventionally, this type of heating cooker includes an intake-exhaust fan and an exhaust-exclusive fan that are forcibly formed in a main body integrated with a top plate and a casing. In such a heating cooker, even if the pressure loss inside the device is large, the air taken in from the intake port is reliably exhausted from the exhaust port, so that the device is efficiently cooled (for example, see Patent Document 1). .)

  In addition, a plurality of (for example, two) heating coils constituting induction heating means are provided at the front part in the main body, and a radial heater that is an electric resistance heating type heating means is provided behind the heating coil. There is also a thing, the air taken in from the fan dedicated to intake air cools the control board equipped with electronic parts, and further cools the operation part provided on the front of the heating cooker or the heating part such as the heating cabinet and heating coil, It is discharged outside by an exhaust fan (see, for example, Patent Document 2).

JP-A-11-354264 JP 2004-288650 A

  Recently, there has also been proposed a third heating coil provided in place of the radial heater provided behind the heating coil, but the heating of the heating coil is not required for cooling the radial heater. Since it is necessary to adopt a suction / exhaust path similar to that of the heating cooker having the configuration in which the heater is provided behind the heating coil in the three-neck induction heating cooker provided with the third heating coil, the third heating coil is provided. There arises a problem that a sufficient amount of cooling air cannot be secured in the heating coil.

  The present invention has been made in view of such problems of the prior art, and even when a heating coil is provided at the rear of the main body, induction heating cooking that can secure a sufficient amount of cooling air for the heating coil is provided. The purpose is to provide a vessel.

  To achieve the above object, the invention according to claim 1 of the present invention includes a main body, a top plate covering the upper surface of the main body, and a plurality of heating coils provided below the top plate; A coil base on which each of the plurality of heating coils is mounted; a roaster having an opening on the front surface of the main body; a roaster cover that covers the roaster; and an air inlet formed on the rear side of the top plate for external air An induction heating cooker including an intake fan for taking in from one of the plurality of heating coils, wherein one of the plurality of heating coils is disposed in the rear of the main body, and the coil base on which the rear heating coil is mounted has the intake air An extension portion extending upward of the fan cover that covers the fan is provided, a ventilation path is formed in the extension section, and air discharged from the intake fan passes through the ventilation path. Characterized in that it has to flow toward the serial rear of the heating coils.

  According to a second aspect of the present invention, the main body, a top plate covering the upper surface of the main body, a plurality of heating coils provided below the top plate, and each of the plurality of heating coils are mounted. Induction provided with a coil base, a roaster having an opening on the front surface of the main body, a roaster cover covering the roaster, and an intake fan for taking external air from an intake port formed behind the top plate In the cooking device, one of the plurality of heating coils is disposed behind the main body, and the coil base on which the rear heating coil is mounted extends upward of a fan cover that covers the intake fan. An extending portion that exits, and the air that is discharged from the intake fan and impinges on the extending portion faces downward of the coil base on which the rear heating coil is placed. Characterized in that the flow Te.

  Furthermore, the invention described in claim 3 is characterized in that the coil base on which the rear heating coil is placed is supported by a part of the fan cover.

  According to a fourth aspect of the present invention, one of a plurality of support members that support the coil base on which the rear heating coil is placed is provided on the fan cover, and the remaining support members are provided on the roaster cover. It is characterized by that.

  In the invention according to claim 5, two tangents parallel to a line connecting the approximate center of the ventilation path and the center of the rear heating coil among the tangent lines of the outer peripheral portion of the rear heating coil. The remaining support members are arranged outside the surface.

  The invention according to claim 6 is characterized in that the support member provided on the fan cover is disposed in the vicinity of the upper side of the side wall of the intake fan case forming the outer shell of the intake fan.

  According to a seventh aspect of the present invention, the coil base on which the rear heating coil is mounted has two coil holders extending substantially in parallel for holding the heating coil, and the coil holder is provided for the ventilation. It extends substantially parallel to a line connecting the approximate center of the path and the center of the rear heating coil.

  Further, in the invention according to claim 8, the coil base on which the rear heating coil is mounted has a magnetic shield ring arranged outside the heating coil, and the ventilation path is formed outside the magnetic shield ring. It is characterized by that.

  The invention according to claim 9 is characterized in that the coil base on which the rear heating coil is mounted has a locking portion and a screwing portion for holding the magnetic shield ring.

  The invention according to claim 10 is characterized in that the screwing portion is provided on the windward side of the locking portion.

  The invention described in claim 11 is characterized in that an auxiliary fan is provided in the vicinity of the fan cover so that air from the auxiliary fan flows toward the extending portion.

  The invention according to claim 12 is characterized in that an auxiliary fan case is formed in the fan cover, and the auxiliary fan is accommodated in the auxiliary fan case.

  In the invention according to claim 13, the auxiliary fan case is a lower case, an upper case is attached to the lower case, and an air inlet is formed in the lower case, while an air intake port is formed in the upper case. A discharge port is formed.

  According to the present invention, when the coil base on which the rear heating coil is placed is provided with the extending portion extending toward the upper side of the fan cover, and the ventilation path is formed in the extending portion, the air is discharged from the intake fan. Since air flows toward the rear heating coil through the ventilation path, the rear heating coil can be sufficiently cooled.

  Further, in the case where the ventilation path is not formed in the above-described extension portion, the air discharged from the intake fan and hitting the extension portion flows toward the lower side of the coil base on which the rear heating coil is placed, and includes the heating coil. The entire coil base can be cooled from below.

  Furthermore, since the coil base on which the rear heating coil is placed is supported by a part of the fan cover, the support portion of the fan cover does not hinder the wind that cools the rear heating coil.

  In addition, if one of the plurality of support members that support the coil base on which the rear heating coil is placed is provided on the fan cover and the remaining support member is provided on the roaster cover, the rear heating coil can be supported in a balanced manner. A desired ventilation path can be secured.

  Further, among the tangent lines of the outer peripheral portion of the rear heating coil, the roaster cover is provided outside the two tangent lines parallel to the line connecting the approximate center of the ventilation path formed in the extending portion and the center of the heating coil. When the support member is arranged, the support member can efficiently cool the entire coil without hindering cooling air.

  Further, since the support member provided on the fan cover is disposed in the vicinity of the protruding portion, the strength of the support member can be sufficiently ensured.

  Further, the two coil holders extending substantially in parallel to hold the rear heating coil are extended substantially parallel to the line connecting the approximate center of the ventilation path and the center of the heating coil. The wind can be efficiently sent to the coil surface without obstruction.

  Further, since the magnetic shield ring is disposed outside the rear heating coil and the ventilation path is formed outside the magnetic shield ring, the magnetic shield ring can be efficiently cooled.

  In addition, because the coil base on which the rear heating coil is placed is provided with a locking portion for holding the magnetic shield ring, deformation caused by thermal expansion of the magnetic shield ring or a part of the coil base that is partially screwed to the coil base. The magnetic shield ring can be securely fixed while preventing it. Furthermore, even if the magnetic shield ring is warped, a predetermined flatness of the magnetic shield ring can be ensured by holding the magnetic shield ring with screws and locking portions.

  Moreover, since the screwing portion is provided on the windward side from the locking portion, the screw used for screwing can be reliably cooled, and loosening of the screw can be prevented.

  In addition, if an auxiliary fan is provided in the vicinity of the fan cover so that air from the auxiliary fan flows toward the ventilation path, the rear heating coil can be cooled more reliably.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 to FIG. 3 show an induction heating cooker according to the present invention, and the cooker main body 2 is dropped from above and incorporated in an opening provided on the top surface of the kitchen cabinet. The upper surface of the main body 2 is covered with a plate frame 6 surrounding the top plate 4 made of crystallized ceramic. A plurality of (three in the present embodiment) heating units 8, 10, and 12 are displayed on the top plate 4 by printing. In the rear part of the main body 2 behind the top plate 4, an intake port 14 for taking outside air into the main body 2 and an exhaust port 16 for discharging the heated air inside the main body 2 to the outside are formed. ing.

  Inside the main body 2 corresponding to the heating units 8, 10, 12, first and second heating coils 18, 20 constituting induction heating means are disposed in front, and behind these two heating coils 18, 20. A third heating coil 22 is provided. These three heating coils 18, 20, and 22 are mounted on coil bases 24, 26, and 28, respectively.

  Below the first heating coil (the heating coil on the left side of FIG. 1) 18, a roaster 30 having an opening on the front surface of the main body is formed as shown by a broken line as a heating chamber for heating fish and the like. A roaster cover 32 as a partition plate that shields heat from the roaster 30 is interposed between the first heating coil 18 and the roaster 30. A gap for heat insulation is provided on the upper surfaces of the roaster cover 32 and the roaster 30.

  A plurality of (for example, three) support members (not shown) for supporting the coil base 24 on which the first heating coil 18 is placed are integrally formed on the roaster cover 32. The first heating coil 18 is pressed against the back surface (lower surface) of the top plate 4 by a spring 33 attached to the support member.

  Moreover, the operation part 35 operated when cooking using an induction heating cooking appliance is provided in the front surface of the main body at the side of the roaster 30. Further, on the side of the roaster 30, below the second heating coil 20, three control boards 34, 36, equipped with electronic components for controlling the first to third heating coils 18, 20, 22, A plurality of (for example, two) centrifugal intake fans 40 and 42 for sucking air outside the main body 2 are arranged above and below. .

  The three control boards 34, 36, 38 are cooled by the discharge air from the intake fans 40, 42. In the present embodiment, however, as indicated by the broken line arrows in FIG. In addition, more cooling air is supplied to the upper and lower control boards 34 and 36 than to the intermediate control board 38. Moreover, since the output of the 3rd heating coil 22 arrange | positioned back among the three heating coils 18, 20, and 22 is the smallest, the control board 38 which controls the 3rd heating coil 22 is arrange | positioned in an intermediate | middle layer. is doing.

  However, since the amount of cooling air in the intermediate layer is small, the intermediate layer is configured in a two-step shape with a step, and the first circuit component such as a switching element or a diode bridge (power module) is placed on the upper step 38a. A second circuit component such as a capacitor is placed on the lower stage 38b to improve the cooling efficiency. On the first circuit component placed on the upper stage 38a, a heat sink 43 for improving the heat transfer rate is fixed as a heat radiating means. A plurality of cooling fins extending are formed.

  In addition, a board integrally formed to cover the control boards 34, 36, 38 and the intake fans 40, 42 and a fan cover (hereinafter referred to as a fan cover) 44 are substantially the same height as the roaster cover 32, An air intake fan case 46 that forms the outer shell of the intake fans 40, 42, the roaster 30, the side wall portion (right side wall portion in FIG. 1) 2a, and the space surrounded by the front wall portion 2b of the main body outer shell It is arranged so as to partition the upper part.

  4 to 6 show a fan cover 44 and an intake fan case 46. On the substrate side of the fan cover 44, a plurality (for example, for supporting a coil base 26 on which the second heating coil 20 is placed (for example, Three support members 48 are integrally formed, and the second heating coil 20 is pressed against the back surface (lower surface) of the top plate 4 by a spring 50 attached to the support member 48.

  The fan cover 44 positioned above the intake fan 40 is integrally formed with an intake portion 44a protruding upward, and external air taken in from the intake port 14 is supplied to the intake portion 44a. To the intake fans 40 and 42. Further, on the third heating coil 22 side of the fan cover 44, one of a plurality of (for example, three) support members 52 for supporting the coil base 28 on which the third heating coil 22 is placed is a fan. It is integrally formed on the cover 44 so as to be close to the upper side wall (vertical wall) of the intake fan case 46.

  Further, as shown in FIG. 7, two support members 54 for supporting the coil base 28 are integrally formed on the roaster cover 32 below the third heating coil 22, and these two supports are supported. The coil base 28 of the third heating coil 22 is brought into contact with the member 54 and the spring 56 attached to the one supporting member 52 described above via the abutting portion 28c and the anti-vibration cap 28d provided on the upper portion thereof. It is pressed by (lower surface).

  As shown in FIGS. 4 to 6, a lower case 60, which is a part of the auxiliary fan case 58, is integrally formed on the third heating coil 22 side of the intake fan case 46. An auxiliary fan 62 is accommodated in the lower case 60, and an upper case 64 that is another part of the auxiliary fan case 58 is screwed to the lower case 60. The lower case 60 is formed with a suction port 60a through which air discharged from the intake fan 40 is sucked, and the upper case 64 is formed with a discharge port 64a through which air discharged from the auxiliary fan 62 is discharged. Is formed.

  As shown in FIGS. 4 and 7, an annular magnetic shield ring 66 is placed on the coil base 28 outside the third heating coil 22, and the coil base 28 outside the magnetic shield ring 66 has A substantially triangular extending portion 28 a extending upward from the fan cover 44 is integrally formed. The extending portion 28a is supported by the above-described support member 52 formed on the fan cover 44, and a ventilation path 68 for sending cooling air to the third heating coil 22 is provided in the vertical direction of the extending portion 28a. Is formed. Note that the above-described magnetic shield ring is similarly placed on the coil base 24 outside the first heating coil 18 and the coil base 26 outside the second heating coil 20.

  Further, the coil base 28 located substantially opposite to the extending portion 28a is integrally formed with a locking portion 28b having a substantially inverted L-shaped vertical section for holding the magnetic shield ring 66, The other two portions of the magnetic-shielding ring 66 partially locked to the locking portion 28 b are screwed to the coil base 28. This attachment method of the magnetic shield ring 66 is to prevent the coil base 28 or the magnetic shield ring 66 from being deformed by thermal expansion and to securely fix the magnetic shield ring 66. A portion may be provided, and at least one portion of the magnetic shield ring 66 may be screwed to the coil base 28. Screws used for screwing may loosen when exposed to high temperatures, and if loosened, it may cause noise. The stop portion 28b is preferably provided on the leeward side.

  Further, two coil holders 70 extending in substantially parallel are screwed to the coil base 28, and the third heating coil 22 is sandwiched between the coil base 28 and the two coil holders 70 and held by the coil base 28. ing. Further, as shown in FIG. 8, the direction in which the coil holder 70 extends substantially coincides with the direction in which the cooling air that has passed through the ventilation path 68 formed in the extending portion 28 a of the coil base 28 flows.

  In addition, the two support members 54 formed on the roaster cover 32 are disposed at positions where the entire third heating coil 22 can be efficiently cooled without obstructing the flow of the cooling air that has passed through the ventilation path 68. . That is, of the tangent lines of the outer peripheral portion of the third heating coil 22, the outer sides of the two tangent lines L 1 and L 2 parallel to the line L connecting the approximate center C of the ventilation path 68 and the center of the third heating coil 22. The two support members 54 are located.

In the induction cooking device having the above configuration, the flow of air when cooking is performed using the third heating coil 22 will be described below.
When an object to be heated such as a pan is placed on the heating unit 12 and cooking is performed using the third heating coil 22, a large current is supplied to the third heating coil 22 by operating the operation unit 35. An eddy current is generated at the bottom of the heated object, and the heated object itself generates heat. At this time, power is also supplied to the intake fans 40 and 42, and the air taken in from the intake port 14 descends the intake fan case 46 and is drawn into the intake fans 40 and 42, as indicated by the dashed arrows in FIG. The The air discharged from the intake fans 40 and 42 passes over the control boards 34, 36 and 38 laminated in three layers, and a part of the opening 44 b is formed in the fan cover 44 above the control board 34. , 44c (see FIG. 4) and the second heating coil 20 and the first heating coil 18, while another part passes the operation portion 35 and further passes through the upper front portion of the roaster 30. Then, each part is cooled and then discharged from the exhaust port 16.

  As described above, among the three control boards 34, 36, and 38, the intermediate control board 36 has a smaller amount of air flow than the upper or lower control boards 34 and 38. The cooling efficiency is improved by the stage configuration. In addition, by providing a height difference between the first circuit component placed on the upper stage 38a of the intermediate layer and the second circuit part placed on the lower stage 38b, the heat sink 43 on the first circuit component is also provided. The cooling air discharged from the intake fan 40 directly hits, and the first circuit component disposed in front of the main body and placed on the upper stage 38a is also sufficiently cooled.

  Further, another part of the air discharged from the intake fan 40 is sucked into the auxiliary fan 62 accommodated in the auxiliary fan case 58 through the suction port 60a formed in the lower case 60 of the auxiliary fan case 58. The air discharged from the auxiliary fan 62 is discharged above the discharge port 64a formed in the upper case 64 of the auxiliary fan case 58.

  Further, the air discharged upward from the auxiliary fan 62 passes through the ventilation path 68 formed in the extending portion 28a of the coil base 28 on which the third heating coil 22 is placed, and the magnetic shield ring 66, the first After the 3 heating coils 22 and the like are cooled, they are discharged from the exhaust port 16.

  In the embodiment described above, the auxiliary fan 62 is attached in the vicinity of the fan cover 44, but the auxiliary fan 62 is not necessarily required. That is, a centrifugal intake fan is employed as the intake fan 40, and a part of the air discharged from the intake fan 40 inevitably extends along the intake fan case 46 due to the centrifugal force. Since it flows below 28a, the air volume for cooling the third heating coil 22 can be secured to some extent even with the configuration in which the ventilation path 68 is formed in the extending portion 28a.

  In addition, it is not always necessary to form the ventilation path 68 in the extended portion 28a. In the case where the ventilation path 68 is not provided, the air discharged from the intake fan 40 hits the extended portion 28a and mounts the third heating coil 22 thereon. Since it flows toward the lower side of the coil base 28 to be placed, the entire coil base including the heating coil can be cooled from below.

  In the above-described embodiment, the substrate cover and the fan cover are integrally formed. However, the substrate cover and the fan cover are not necessarily formed integrally, and may be separated.

  As described above, since the heating cooker according to the present invention can efficiently cool the heating coil arranged at the rear, the three-mouth induction heating cooker provided with two heating coils in the front and one heating coil in the rear. Useful as.

The exploded perspective view of the induction heating cooking appliance concerning this invention 1 is a longitudinal sectional view of the induction heating cooker of FIG. Top view of the induction heating cooker of FIG. 1 with the top plate removed The disassembled perspective view of the 3rd heating coil, fan cover, and intake fan case which were provided in the induction heating cooking appliance of FIG. The perspective view when the auxiliary fan case shown in FIG. 4 is viewed from below Front view of the third heating coil, fan cover, and intake fan case of FIG. Plan view of third heating coil The top view of the 3rd heating coil which shows the flow of cooling air

Explanation of symbols

2 cooker body, 2a side wall, 2b front wall, 4 top plate,
6 plate frame, 8, 10, 12 heating section, 14 air inlet, 16 air outlet,
18, 20, 22 heating coil, 24, 26, 28 coil base,
28a extension part, 28b locking part, 28c contact part, 28d anti-vibration cap,
30 roaster, 32 roaster cover, 33 spring,
34, 36, 38 control board, 35 operation unit, 38a upper control board,
38b Lower control board, 40, 42 Intake fan, 43 Heat sink,
44 Fan cover, 44a Air intake part, 46 Air intake fan case,
48 support members, 50 springs, 52, 54 support members, 56 springs,
58 Auxiliary fan case, 60 Lower case, 60a Suction port,
62 Auxiliary fan, 64 Upper case, 64a Discharge port, 66 Magnetic shield ring,
68 Ventilation path, 70 Coil holder.

Claims (13)

A main body, a top plate covering the upper surface of the main body, a plurality of heating coils provided below the top plate, a coil base on which each of the plurality of heating coils is mounted, and an opening in the front surface of the main body An induction heating cooker comprising: a roaster having a roaster, a roaster cover that covers the roaster, and an intake fan for taking outside air from an intake port formed behind the top plate;
One of the plurality of heating coils is disposed behind the main body, and the coil base on which the rear heating coil is mounted includes an extending portion that extends upward of a fan cover that covers the intake fan. An induction heating cooker characterized in that an air passage is formed in the extending portion so that the air discharged from the intake fan flows toward the rear heating coil through the air passage. A main body, a top plate covering the upper surface of the main body, a plurality of heating coils provided below the top plate, a coil base on which each of the plurality of heating coils is mounted, and an opening in the front surface of the main body An induction heating cooker comprising: a roaster having a roaster, a roaster cover that covers the roaster, and an intake fan for taking outside air from an intake port formed behind the top plate;
One of the plurality of heating coils is disposed behind the main body, and the coil base on which the rear heating coil is mounted includes an extending portion that extends upward of a fan cover that covers the intake fan. An induction heating cooker characterized in that the air discharged from the intake fan and hitting the extension part flows downwardly of the coil base on which the rear heating coil is placed. The induction heating cooker according to claim 1 or 2, wherein the coil base on which the rear heating coil is placed is supported by a part of the fan cover. The one of a plurality of supporting members that support the coil base on which the rear heating coil is placed is provided on the fan cover, and the remaining supporting members are provided on the roaster cover. Induction heating cooker. Out of the tangent lines of the outer peripheral portion of the rear heating coil, the remaining support members are arranged outside two tangent lines parallel to the line connecting the approximate center of the ventilation path and the center of the rear heating coil. The induction heating cooker according to claim 1. The induction heating cooker according to claim 4, wherein the support member provided on the fan cover is disposed in the vicinity of an upper portion of a side wall of an intake fan case forming an outer shell of the intake fan. The coil base on which the rear heating coil is mounted has two coil holders extending substantially in parallel to hold the heating coil, and the coil holder includes a substantially center of the ventilation path and the rear heating coil. The induction heating cooker according to claim 1, wherein the induction heating cooker extends substantially parallel to a line connecting the centers. The said coil base which mounts the said back heating coil has a magnetic-shielding ring arrange | positioned on the outer side of a heating coil, The said ventilation path was formed in the outer side of this magnetic-shielding ring, It is characterized by the above-mentioned. Induction heating cooker. The induction heating cooker according to claim 8, wherein the coil base on which the rear heating coil is placed has a locking portion and a screwing portion for holding the magnetic shield ring. The induction heating cooker according to claim 9, wherein the screwing portion is provided on the windward side of the locking portion. The induction heating cooker according to claim 1 or 2, wherein an auxiliary fan is provided in the vicinity of the fan cover so that air from the auxiliary fan flows toward the extending portion. The induction heating cooker according to claim 10, wherein an auxiliary fan case is formed on the fan cover, and the auxiliary fan is accommodated in the auxiliary fan case. The auxiliary fan case is a lower case, an upper case is attached to the lower case, an air inlet is formed in the lower case, and an air outlet is formed in the upper case. Item 13. The induction heating cooker according to Item 12.

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