WO2008026443A1

WO2008026443A1 - Induction-heating cooker

Info

Publication number: WO2008026443A1
Application number: PCT/JP2007/065752
Authority: WO
Inventors: Kazuichi Okada; Takaaki Kusaka; Atsushi Sakamoto
Original assignee: Panasonic Corporation
Priority date: 2006-09-01
Filing date: 2007-08-10
Publication date: 2008-03-06
Also published as: JP4783244B2; JP2008059983A

Abstract

An induction-heating cooker comprises a body, a top plate for covering the upper surface of the body, heating coils provided below the top plate, and an air suction fan for taking-in the outside air through a suction port formed in the top plate. One (22) of the heating coils is disposed at a rear position in the interior of the body. Furthermore, a ventilation passage (53) used exclusively for cooling the heating coil (22) disposed at a rear position is provided in the body.

Description

Specification

Induction heating cooker

Technical field

[0001] The present invention relates to an induction heating cooker used by being incorporated in a system kitchen or the like.

Background art

[0002] Conventionally, there is a type of heating cooker of this type in which an intake-exhaust fan and an exhaust-only fan are provided in a main body integrated with a top plate and a casing to forcibly form an intake / exhaust path. . In such a heating cooker, even if the pressure loss inside the device is large, the air taken in from the intake port is surely exhausted from the exhaust port, so that the device is efficiently cooled (for example, patent literature). See 1.)

[0003] In addition, a plurality of (for example, two) heating coils constituting the induction heating means are provided in the front part of the main body, and a radial heater which is an electric resistance heating type heating means is provided behind the heating coil. The air taken in from the dedicated intake fan cools the control board equipped with electronic components, and the operation part provided on the front of the heating cooker or the heating part such as a heating cabinet or heating coil. After cooling, it is discharged to the outside by an exhaust fan (for example, see Patent Document 2).

[0004] Patent Document 1: Japanese Patent Laid-Open No. 11 354264

Patent Document 2: JP 2004-288650 A

Disclosure of the invention

Problems to be solved by the invention

[0005] Recently, there has also been proposed a power heater provided with a third heating coinole instead of the radial heater provided behind the heating coil, whereas the radial heater does not need to be cooled. Therefore, if the same intake / exhaust path is adopted for a three-neck induction heating cooker with a third heating coil as a heating cooker with a radial heater behind the heating coil, A sufficient amount of cooling air cannot be secured in the third heating coil! [0006] 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, a sufficient amount of cooling air for the heating coil can be ensured. For the purpose of providing induction cookers!

Means for solving the problem

In order to achieve the above object, the present invention provides a main body, a top plate that covers the upper surface of the main body, and first and second heating coils provided below the top plate and positioned in front of the main body. And a third heating coil positioned between the first and second heating coils at the rear of the main body and an air inlet formed on the upper surface of the main body on the rear side of the top plate. An intake fan that is introduced into the interior and blows forward and exhausted from an exhaust port provided on the outer surface of the main body on the first heating coil side, and the first and second heating coils disposed in front of the intake fan An induction heating cooker comprising a control board for driving the board and a board power bar covering the control board, wherein the air for cooling the third heating coil is outside the second heating coil. The center of the third heating coil and the suction It is characterized in that an air passage that blows out from an outlet formed between the outer shell of the air fan is provided.

[0008] According to another aspect of the present invention, there is provided a main body, a top plate covering an upper surface of the main body, first and second heating coils provided below the top plate and positioned in front of the main body, and A third heating coil located between the first and second heating coils at the rear of the main body, a roaster provided below the first heating coil, and external air from the upper rear surface of the main body An intake fan for exhausting the exhaust port force provided on the outer surface of the main body on the first heating coil side. A roaster cover that partitions the space on the roaster side and the space on the control board and the first heating coil side, and the intake fan in the space on the side of the roaster that is cut by the side wall of the roaster cover. Arrange forward An induction heating cooker provided with a control board for driving the heating coil and a board cover for covering the control board, wherein the air blown from the intake fan to the control board The air is guided to the rear by an air passage formed in the space surrounded by the outer shell of the intake fan and the side wall of the roaster cover, blown from the discharge port formed at the rear inside the main body, and blown to the third heating coil. It is characterized by doing. [0009] It is preferable that the discharge port of the ventilation path is formed on a substrate cover that covers an outer shell of the intake fan or the control substrate.

[0010] Further, it is preferable that an auxiliary fan for sending air blown out from the discharge loci of the ventilation path is provided in the main body.

[0011] In another form of the present invention, there are provided a main body, a top plate covering the upper surface of the main body, first and second heating coils provided in front of the main body, A third heating coil located between the first and second heating coils at the rear of the main body and an external air from an inlet formed on the second heating coil side of the upper rear surface of the main body. Intake into the main body, blown forward, exhaust outlet force provided on the outer surface of the main body on the first heating coil side, an intake fan for exhausting, and the first and second heating coils disposed in front of the intake fan An induction heating cooker comprising a control board that drives the control board and a board cover that covers the control board, and a discharge port that blows air for cooling the third heating coil from a position behind the main body An air passage having an inside in the main body A part of the ventilation path is a ventilation dart formed inside the fan body that covers the intake fan, and a ventilation path intake port that is an intake port of the ventilation path is formed in the ventilation duct. An auxiliary fan is attached to the inside of the main body, and the air sucked into the auxiliary fan is sent to the third heating coil through the air inlet of the ventilation path provided at a lower temperature than the outlet. It is characterized by that.

[0012] A part of the ventilation path is formed in a ventilation duct formed in an outer shell of the intake fan or the substrate cover, or a substrate case that holds the control substrate positioned in front of the intake fan. It is a ventilation duct.

[0013] In addition, it is preferable that the ventilation path intake port is provided on the windward side of the intake fan, and the outside air is sucked through the intake fan.

[0014] Further, a part of the ventilation path is a ventilation duct formed inside the main body, and a ventilation path intake port that is an intake port of the ventilation path is formed in the ventilation duct, and an auxiliary fan is formed inside the main body. The air sucked into the auxiliary fan is sent to the third heating coil via the air passage intake port provided at a lower temperature than the discharge port, and the air passage intake port is You may provide in the windward side of the said roaster cover. [0015] Still another embodiment of the present invention includes a main body, a top plate that covers the upper surface of the main body, first and second heating coils that are provided below the top plate and are located in front of the main body, and the front A third heating coil located between the first and second heating coils at the rear of the main body and an external air from an inlet formed on the second heating coil side of the upper rear surface of the main body. Intake into the main body, blown forward, exhaust outlet force provided on the outer surface of the main body on the first heating coil side, an intake fan for exhausting, and the first and second heating coils disposed in front of the intake fan An induction heating cooker comprising a control board for driving the board and a board cover covering the control board, wherein an air passage for blowing out air for cooling the third heating coil is provided inside the main body. , The air inlet of the ventilation path A passage air inlet is formed in a direction different from the inlet fan discharge port on the side wall of the outer shell of the intake fan, and a ventilation duct constituting the ventilation passage is formed in the outer shell of the intake fan, The air sucked into the intake fan is sent to the third heating coil through the ventilation passage inlet and the ventilation duct.

[0016] An auxiliary fan may be attached to the ventilation duct.

[0017] In yet another embodiment of the present invention, a main body, a top plate covering the upper surface of the main body, first and second heating coils provided below the top plate and positioned in front of the main body, and the front A third heating coil located between the first and second heating coils at the rear of the main body and an external air from an inlet formed on the second heating coil side of the upper rear surface of the main body. Intake into the main body, blown forward, exhaust outlet force provided on the outer surface of the main body on the first heating coil side, an intake fan for exhausting, and the first and second heating coils disposed in front of the intake fan An induction heating cooker comprising a control board for driving the board and a board cover covering the control board, wherein an air passage for blowing out air for cooling the third heating coil is provided inside the main body. , A part of the ventilation path is the intake air A ventilation duct formed by a board cover that covers the control board located in front of the fan, and another ventilation data that is a part of the ventilation path is provided on an outer shell of the intake fan in the vicinity of the ventilation duct. The air that is formed and sucked into the intake fan is sent to the third heating coil via the ventilation duct of the substrate cover and the ventilation duct of the outer shell of the intake fan. [0018] It is preferable that an auxiliary fan is attached to the ventilation duct formed in the outer shell of the intake fan or the ventilation duct formed in the substrate cover.

[0019] When the second ventilation duct discharge port is formed in the substrate cover on the front side in the main body from the discharge port of the ventilation path, the air sucked into the intake fan is discharged into the second ventilation duct discharge port. In addition to being sent to the first and second heating coils via the outlet, it can be sent to the third heating coil via the ventilation data discharge port.

The invention's effect

[0020] According to the present invention, air for cooling the third heating coil is formed outside the second heating coil between the center of the third heating coil and the outer shell of the intake fan. Since there is a ventilation passage that blows out the discharge loca, the pressure difference between the outer periphery of the intake fan outer shell and the exhaust port occurs due to the intake and exhaust action of the intake fan, and the wind blown from the discharge port near the intake fan Therefore, the air flows in the direction of the third heating coil located on the exhaust port side of the discharge port, so that a sufficient amount of air for cooling the third heating coil can be secured and the cooling can be efficiently performed. .

[0021] In addition, the air blown from the intake fan to the control board is guided rearward by a ventilation path formed in a space surrounded by the board cover, the outer shell of the intake fan, and the side wall of the roaster cover. When air is blown from the discharge port formed at the rear and blown to the third heating coil, a part of the cooling air blown out by the intake fan is efficiently guided to the third heating coil, and the exhaust located on the opposite side of the intake fan Cooling air can flow smoothly through the mouth

[0022] In addition, when the discharge port of the ventilation path is formed in the outer cover of the intake fan or the substrate cover that covers the control board, the discharge port and the ventilation path can be provided simultaneously by attaching these components to the main body. High-density mounting can be performed, or the ability to improve assembly can be improved.

[0023] When an auxiliary fan for sending the air in the ventilation path to the third heating coil is provided in the main body, a larger amount of air can be blown to the third heating coil more efficiently.

[0024] In addition, a ventilation path for blowing out air for cooling the third heating coil is provided inside the main body, and a part of the ventilation path is configured by a ventilation duct formed in the outer shell of the intake fan. Auxiliary fan is attached to the outer shell or the substrate cover, and installed on the windward side from the outlet When the air sucked into the auxiliary fan is sent to the third heating coil through the ventilated air inlet, the third heating coil is forced to flow near the third heating coil. The cooling efficiency can be improved. In addition, if an auxiliary fan is provided, the third heating coil can be forcedly cooled with the required air volume, and the exhaust fan's exhaust resistance must be reduced to increase the speed of the intake fan more than necessary. , So noise is reduced

[0025] Further, a part of the ventilation path is a ventilation duct formed in the outer shell of the intake fan or the substrate cover, or the ventilation formed in the substrate case holding the control substrate located in front of the intake fan. If it is a duct, it is possible to improve the assemblability when the ventilation path is provided in the main body and to design a high density.

[0026] In addition, when a ventilation path intake port is provided on the windward side of the intake fan and external air is sucked through the intake fan, air close to room temperature is forced to flow near the third heating coil to perform the third heating. You can cool the coins.

[0027] In addition, if the ventilation path intake port is provided on the windward side of the roaster cover, the air before the temperature rises due to the heat generated by the roaster is forced to flow in the vicinity of the third heating coil to The heating coil can be cooled.

[0028] Further, if the ventilation path intake port, which is the intake path of the ventilation path that blows out air for cooling the third heating coil, is formed in a different direction from the intake fan discharge port on the side wall of the outer shell of the intake fan. In both cases, when the ventilation duct forming the ventilation path is formed in the outer shell of the intake fan and the air sucked into the intake fan is sent to the third heating coil via the ventilation path intake port and the ventilation duct, If the configuration is simplified, the third heating coil can be cooled with air at room temperature instead of force. In this case, if an additional auxiliary fan for cooling the third heating coil is provided, the burden on the intake fan can be reduced, so it is cheaper and has less noise.

[0029] Further, when the auxiliary fan is fixed to the outer shell of the intake fan or the substrate cover, it is possible to improve the assemblability when the auxiliary fan is attached to the main body and to design a high density.

[0030] Further, a part of the ventilation path is configured by a ventilation duct formed in a board cover that covers a control board positioned in front of the intake fan, and another ventilation that is a part of the ventilation path is formed on the outer shell of the intake fan. A duct is formed and the air drawn into the intake fan is passed through the two ventilation ducts to the third The air around the control board can be extracted efficiently, and the control board has an upwind! /, If there is a ventilation passage air intake at the top, there is little heat effect on the control board! /, Since air can be taken in and the third heating coil can be cooled, the cooling efficiency is improved. In addition, if an auxiliary fan is installed in the outer shell of the intake fan, it can be forced to increase the flow of air to the third heating coil and cool it, while reducing the exhaust resistance of the intake fan and making the intake fan speed higher than necessary. There is no need to increase! /, So noise is reduced.

[0031] Further, a second ventilation duct discharge port is formed in the substrate cover on the front side of the ventilation path discharge port, and the air sucked into the intake fan is supplied to the first and second air via the second ventilation duct discharge port. When it is sent to the second heating coil and sent to the third heating coil via the ventilation path discharge port, a part of the ventilation path is formed in the board case that holds the control board located in front of the intake fan. If an auxiliary fan is attached to this ventilation duct, the control board is cooled and the heated air can be extracted from the periphery of the control board, and the third heating coil can be cooled.

Brief Description of Drawings

FIG. 1 is an exploded perspective view of an induction heating cooker according to a first embodiment of the present invention.

[Figure 2] Longitudinal section of the induction heating cooker of Figure 1

[Figure 3] Top view of the induction heating cooker of Figure 1 with the top plate removed

FIG. 4 is an exploded perspective view of the third heating coil, fan cover, and intake fan case provided in the induction heating cooker of FIG.

[Fig. 5] Front view of third heating coil, fan cover, and intake fan case in Fig. 4

[Fig.6] Plan view of third heating coil

[Figure 7] Plan view of third heating coil showing cooling air flow

FIG. 8 is an exploded perspective view of a third heating coil, a fan cover, and an intake fan case provided in the induction heating cooker according to the second embodiment of the present invention.

FIG. 9 is an exploded perspective view of a third heating coil, a fan cover, and an intake fan case provided in the induction heating cooker according to the third embodiment of the present invention.

FIG. 10 is a perspective view of the auxiliary fan case shown in FIG. 9 as viewed from below.

FIG. 11 shows a third heating coil provided in the induction heating cooker according to the fourth embodiment of the present invention. Exploded perspective view of the chassis, fan cover and board case

Explanation of symbols

[0033] 2 cooker body, 2a side wall, 2b front wall, 4 top plate,

6 Plate frame, 8, 10, 12 Heating section, 14 Inlet, 16 Exhaust,

18, 20, 22 Karo fever: πinore, 24, 26, 28: πinore base,

28a extension part, 28b locking part, 28c contact part, 28d elastic member,

30 roaster, 32 roaster cover, 33 spring,

34, 36, 38 Control board, 35 Control unit, 38a Upper control board,

38b Lower control board, 40, 42 Intake fan, 41 Intake fan motor,

43 heat sink, 44 board fan cover, 44a air intake,

44b, 44c Higuchi 44d ¾ Kanoichi, 44e Funkanoichi,

46 Air intake fan case, 46a Ventilation path, 48 support member, 50 spring,

52 Support member, 53 Ventilation duct, 53a Inlet,

53b Ventilation channel outlet, 54 Support member, 56 Spring,

58 Auxiliary fan case, 60 lower case, 60a inlet,

62 Auxiliary fan, 64 Upper case, 64a outlet, 64b inlet,

66 Magnetic shield, 68 Ventilation path, 70 Coil holder, 72 Ventilation duct,

72a first outlet, 72b second outlet, 74 substrate case,

76 Ventilation duct, 76a outlet, 78 circuit components, 80 heat sink.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1.

FIGS. 1 to 3 show the induction heating cooker according to the first embodiment of the present invention, and the main body 2 is dropped into the opening provided on the top surface of the kitchen cabinet and assembled. It is. The upper surface of the main body 2 is covered with a top plate unit configured by surrounding the top plate 4 made of crystallized ceramic with a plate frame 6! On the top plate 4, a plurality of (three in the present embodiment) heating units 8, 10, and 12 are displayed by printing. External air is taken into the main body 2 at the rear of the main body 2 behind the top plate 4. And an exhaust port 16 for exhausting the air heated by the heat generating parts in the main body 2 to the outside!

[0036] Inside the main body 2 corresponding to the heating sections 8, 10, and 12, the first and second heating coils 18 and 20 constituting the induction heating means are disposed in the forward direction below the top plate 4. A third heating coil 22 is disposed at a position biased backward between the two heating coils 18 and 20. These three calo heat coins 18, 20, and 22 are placed on coin bases 24, 26, and 28, respectively.

[0037] Below the first heating coil 18 on the exhaust outlet 16 side (the left heating coil in FIG. 1) 18 is a roaster 30 having an opening on the front surface of the main body and incorporating a heater. The heating chamber is formed as indicated by a broken line as a heating chamber, and a roaster cover 32 as a partition plate that shields heat from the roaster 30 is provided between the control boards 36 and 38 and the roaster 30, and the first heating It is interposed between coil 18 and roaster 30. That is, the rotor cover 32 is a heat shield that partitions the space on the roaster 30 side from the space on the control boards 36 and 38 and the first heating coil 18 side. In addition, a clearance for heat insulation is provided on the upper surfaces of the roaster cover 32 and the roaster 30.

[0038] On the roaster force bar 32 in which a metal plate such as an iron plate is bent to form a horizontal portion and a vertical wall portion, a plurality of members for supporting the coil base 24 on which the first heating coil 18 is placed. (For example, three) support members (not shown) are fixed, and 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. .

[0039] Further, on the front surface of the main body on the side of the roaster 30 (on the intake port 14 side), there is provided an operation unit 35 that is operated when cooking using the induction heating cooker. Further, on the side of the roaster 30 (on the intake port 14 side), below the second heating coil 20, it is partitioned by the side wall of the roaster cover 32, the substrate cover 44d (substrate fan cover 44), and the main body side wall 2a. In the space, three control boards 34, 36, 38 equipped with electronic parts for controlling the first to third heating coils 18, 20, 22 are arranged in a vertically stacked state. Behind it, a plurality of (for example, two) centrifugal-type intake fans 40, 42 for vertically sucking air outside the main body 2 and discharging the air in the direction of the control boards 34, 36, 38 are arranged vertically. It is.

[0040] The three control boards 34, 36, 38 are cooled by the air discharged from the intake fans 40, 42. In the present embodiment, the configuration of the intake fans 40, 42 is indicated by broken line arrows in FIG. As described above, more cooling air is supplied to the upper and lower control boards 34 and 36 than to the intermediate control board 38. Also, of the three heating coils 18, 20, and 22, since the frequency of use is low, the rated output of the third heating coil 22 arranged at the rear is set to be the smallest. The control board 38 that controls the three heating coils 22 is arranged in the intermediate layer

Yes

[0041] However, since the cooling air volume of the intermediate layer is small, the intermediate layer is configured in a two-step shape with a step, and the first such as a switching element or a diode bridge (power module) that is a heat generating component is formed. The second circuit component, such as a resonant capacitor, which is a heat generating component, is placed on the lower stage 38b so that the temperature rise distribution is equalized and cooling efficiency is improved. Has improved. 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 dissipation means. A plurality of extending cooling fins are formed.

[0042] Further, there are a board cover 44d provided to cover the control boards 34, 36, 38 from above and a fan cover 44e provided to form an outer shell of the intake fans 40, 42 and cover the upper part thereof. Integrated board fan cover 44 force Intake fan case 46, roaster cover 32 that forms the outer shell of the intake fans 40, 42 and covers the sides at the same height as the upper surface (horizontal plane) of the roaster cover 32 The main body outer shell is arranged so as to partition the upper side of the space surrounded by the side wall portion (right side wall portion in FIG. 1) 2a and the front wall portion 2b of the main body outer shell.

4 and 5 show the board fan cover 44 and the intake fan case 46. On the board side of the board fan cover 44, a board cover 44d is formed. A plurality of (for example, three) cylindrical support members 48 for supporting the coil base 26 on which the second heating coil 20 is placed are integrally formed of a resin material on the substrate cover 44d. The coil base 26 is in a state in which a cylindrical contact portion (not shown) and an elastic member (not shown) provided thereon are in contact with each other by a spring 50 fitted and attached to the support member 48. Top The distance between the second heating coil 20 and the back surface of the top plate 4 is secured by being pressed against the back surface (bottom surface) of the plate 4.

[0044] Further, the board fan cover 44 located above the intake fan 40 is integrally formed of a resin material with a fan cover 44e protruding upward, and the intake port 14 force and the like are taken in. The external air thus drawn is sucked into the intake fans 40 and 42 from the intake portion 44a provided inside the fan cover 44e. In addition, a substrate cover 44d is integrally formed of a resin material on the third heating coil 22 side in front of the substrate fan cover 44, and the coil base 28 on which the third heating coil 22 is placed. One of a plurality of (for example, three) supporting members 52 for supporting the fan is integrally formed of a resin material in a state of being close to the upper portion of the side wall (vertical wall) of the intake fan case 46 in the board fan cover 44. ing.

Furthermore, a dedicated ventilation duct 53 for cooling the third heating coil 22 is formed integrally with the substrate fan cover 44 on the third heating coil 22 side of the fan cover 44e. This ventilation duct 53 is divided into front and rear, and a ventilation path intake port 53a is formed at the rear and a ventilation path discharge port 53b is formed at the front!

[0046] A lower case 60, which is a part of the auxiliary fan case 58, is integrally formed of a resin material on the third heating coil 22 side of the intake fan case 46. The auxiliary fan 62 is accommodated, and an upper case 64 that is another part of the auxiliary fan case 58 is screwed to the lower case 60. In addition, the upper case 64 behind the auxiliary fan 62 is formed with an intake port 64b positioned directly below the intake port 53a of the ventilation duct 53 formed integrally with the fan cover 44. The upper case 64 is formed with a discharge port 64a positioned immediately below the discharge port 53b of the ventilation data 53.

[0047] As shown in FIG. 6, on the roaster cover 32 below the third heating coil 22, two cylindrical support members 54 for supporting the coil base 28 are vertically arranged at the positions indicated by broken lines. The coil base 28 is formed by the two support members 54 and the spring 56 attached to the one support member 52 described above, so that the coil base 28 has a cylindrical contact portion 28c and an inertia member 28d provided thereon. The third heating coil 22 is pressed against the back surface (lower surface) of the top plate 4 in a state where the contact is made, and the distance between the third heating coil 222 and the back surface of the top plate 4 is secured. As shown in FIG. 4 and FIG. 6, an annular magnetic shield ring 66 is placed on the coil base 28 outside the third heating coil 22. The fan 28 is integrally formed with a substantially triangular extending portion 28a extending upward from the fan cover 44e so as to substantially face the outlet 53b of the ventilation duct. The extending portion 28a is supported by the support member 52 described above formed on the substrate fan cover 44, and a ventilation path 68 for sending cooling air to the third heating coil 22 is provided above and below the extending portion 28a. It is formed in the direction. The above-described magnetic-shielding 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.

[0049] Further, the coil base 28 positioned substantially opposite to the extending portion 28a is provided with a locking portion 28b having a substantially inverted L-shaped vertical section for holding the magnetic shield ring 66. The magnetic shield 66, which is formed and partially locked to the locking portion 28b, is screwed to the coil base 28 at the other two points. Since the magnetic shield ring generates heat, the temperature of the part located on the leeward side is higher than the temperature of the part located on the leeward side. Since there is a gap in the locking part, there is no problem even if the dimensions of the resin part change due to aging, but there is a risk that the screw will loosen in the screwed part. This method of attaching the magnetic shield ring 66 prevents the coil base 28 or the magnetic shield ring 66 from being deformed by thermal expansion, and ensures that the magnetic shield ring 66 is fixed by screwing it on the windward where temperature change is small. The coil base 28 is provided with a plurality of locking portions, and at least one power point of the magnetic shield ring 66 is on the windward side! /, And is screwed to the coil base 28. You can do it! /

[0050] Further, two coil holders 70 extending substantially in parallel to the coil base 28 are screwed at the inner portion of the intermediate winding portion between the outer winding portion and the inner winding portion of the third heating coil 22. The third heating coil 22 is held between the coil base 28 and the coil base 28 by being sandwiched between the coil base 28 and the two coil holders 70. Further, as shown in FIG. 7, 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 28a of the coil base 28 flows. Yes.

[0051] In addition, the two support members 54 that are vertically attached to the roaster cover 32 efficiently remove the entire third heating coil 22 that does not obstruct the flow of the cooling air that has passed through the ventilation path 68. It is placed in a position where it can be cooled. That is, out of the two tangents LI and L2 parallel to the line L connecting the approximate center C of the ventilation path 68 and the center of the third heating coil 22 among the tangent lines of the outer peripheral portion of the third heating coil 22 Two support members 54 are located in the middle.

[0052] In the induction heating cooker having the above configuration, the flow of air when cooking is performed using the third heating coil 22 will be described below.

[0053] 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, the operation unit 35 is operated to apply a high-frequency current to the third heating coil 22. When supplied, an eddy current is generated at the bottom of the object to be heated and the object to be heated 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 shown by the broken arrows in FIG. The In addition, the air discharged from the intake fans 40, 42 passes over the control boards 34, 36, 38 laminated in three layers, and part of the openings are formed in the board cover 44d above the control board 34. 44b, 44c (see FIG. 4) and the second heating coil 20 and the first heating coil 18, while another part flows along the inner wall of the housing of the operation unit 35, and After passing through the front upper part of the roaster 30 and cooling each part, it is discharged from the exhaust port 16.

[0054] As shown in FIG. 2, since the intake fans 40, 42 are formed on both sides of the intake fan motor 41, the intermediate layer control among the three-layer control boards 34, 36, 38 is controlled. Substrate 36 has less airflow than upper or lower control substrates 34 and 38, so the intermediate layer has a two-stage configuration to improve cooling efficiency. 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 part is also provided. The cooling air discharged from the intake fan 40 directly hits, and the first circuit component placed in front of the main body and placed on the upper stage 38a is also sufficiently cooled.

[0055] In addition, since the power is supplied to the auxiliary fans 62 at the same time as the power is supplied to the intake fans 40, 42, air is also taken in from the air inlet 53a of the air duct 53 dedicated to the third heating coil 22. The taken-in air is sucked into the auxiliary fan 62 through the suction port 64b formed in the upper case 64 of the auxiliary fan case 58, and then is ventilated through the discharge port 64a formed in the upper case 64. It is discharged above the 53 outlet 53b. [0056] Further, the air discharged above the discharge port 53b passes through the ventilation path 68 formed in the extension portion 28a of the coil base 28 on which the third heating coil 22 is placed, and is thus shielded. 66, after cooling the third heating coil 22 and the like, it is discharged from the exhaust port 16.

[0057] As described above, the air for cooling the third heating coil 22 is outside the second heating coil 22, and the center of the third heating coil 22 and the outer shells of the intake fans 40, 42 (fan cover). 44e and the intake fan case 46) are provided with a ventilation path that blows out from the discharge port 53b (path from the ventilation path intake port 53a to the discharge port 53b). Causes a pressure difference between the periphery of the outer shell of the intake fans 40 and 42 and the exhaust port 16, and the wind blown from the discharge port 53b near the outer shell of the intake fans 40 and 42 is exhausted from the discharge port 53b. Since it flows in the direction of the third heating coil 22 on the side of the mouth 16, a sufficient amount of air for cooling the third heating coil 22 can be secured and the cooling can be performed efficiently.

[0058] In addition, since the outlet 53b of the ventilation path is formed by the fan cover 44e that forms the outer shell of the intake fan 40, 42, by attaching these components in the main body, the outlet 53b and Ventilation paths can be provided at the same time, enabling high-density mounting or improving assembly. The discharge port 53b may be formed in a substrate cover 44d that covers the control substrate or an intake fan case that forms an outer shell of the intake fan.

[0059] In addition, a ventilation path for blowing out air for cooling the third heating coil 22 is provided inside the main body, and a part of the ventilation path is provided in the outer shell of the intake fan (the intake fan case 46 and the intake fan cover 44d). It is composed of the formed ventilation ducts (ventilation duct 53 and auxiliary case 58), and the auxiliary fan 62 is attached to the outer shell of the intake fan, and the ventilation path intake port 53a provided on the windward side from the discharge port 53b If the air sucked into the auxiliary fan 62 is sent to the third heating coil 22 through the air, the low-temperature air is forced to flow in the vicinity of the third heating coil 22 to cool the third heating coil 22. Can improve the cooling efficiency. As in the present embodiment, when the ventilation path intake port 53a is provided on the windward side of the intake fans 40, 42 and the outside air is sucked without passing through the intake fans 40, 42, the third heating coil 22 draws air close to room temperature. The force S can be forced to flow in the vicinity. Furthermore, since the auxiliary fan is provided, the third heating coil 22 can be forcibly cooled with the required air volume. A part of the ventilation path is provided in the board cover 44d instead of the outer shell of the intake fan, and the position inside the main body (eg, the intake fan 40, A ventilation passage intake port 53a may be provided in the vicinity of 42 discharge ports or in the vicinity of the control boards 34, 36, and 38).

In the above-described embodiment, the substrate cover and the fan cover are integrated with a resin material to form the substrate fan cover so that the assemblability is improved. It may be a separate body.

[0061] Embodiment 2.

Hereinafter, the second embodiment of the present invention will be described only with respect to the difference from the first embodiment described above with reference to FIG.

[0062] In the first embodiment described above, the force S in which the dedicated ventilation duct 53 for cooling the third heating coil 22 is formed integrally with the fan cover 44, in this embodiment, the ventilation duct. Ventilation passage 46a is formed at the upper part of intake fan case 46 without providing 53.

[0063] Further, on the third heating coil 22 side of the intake fan case 46, a lower case 60, which is a part of the auxiliary fan case 58, is integrally formed of a resin material. An auxiliary fan 62 shown in FIG. 7 is accommodated, and an upper case 64 that is another part of the auxiliary fan case 58 is screwed to the lower case 60. The upper case 64 has a discharge port 64a through which air discharged from the auxiliary fan 62 is discharged. Air sucked into the auxiliary fan 62 from the intake fan 40 via the ventilation path 46a is It is discharged upward through the discharge port 64a.

In the present embodiment, when cooking is performed using the third heating coil 22, the air discharged from the intake fans 40, 42 is sent toward the control boards 34, 36, 38. A part of the discharged air is sucked into the auxiliary fan 62 through the ventilation path 46 a formed in the intake fan case 46. The air sucked into the auxiliary fan 62 passes through the discharge port 64a formed in the upper case 64, and the ventilation path 68 is formed in the extension portion 28a of the coil base 28 on which the third heating coil 22 is placed. After passing through, the magnetic shield ring 66, the third heating coil 22 and the like are cooled, and then discharged from the exhaust port 16.

[0065] As described above, the side wall of the intake fan case 46, which is the outer shell of the intake fan, is connected to the ventilation path intake port 46a, which is the intake port of the ventilation path that blows out air for cooling the third heating coil 22. The ventilation duct (auxiliary fan case 58) that communicates with the ventilation path is formed in the intake fan case 46, which is the outer shell of the intake fans 40, 42. If the air sucked into 40 and 42 is sent to the third heating coil 22 via the ventilation passage inlet 46a and the ventilation duct (auxiliary fan case 58), if the configuration is simplified, the power is not limited to the room temperature. The third heating coil 22 can be cooled with air. In this case, if an additional auxiliary fan 62 for cooling the third heating coil 22 is further provided, the burden on the intake fans 40, 42 can be reduced, so that the cost is low and the noise is low. In addition, when the auxiliary fan 62 is fixed to the outer shell of the intake fans 40, 42 (may be fixed to the board cover 44d), the assembly when attaching the auxiliary fan 62 to the main body is improved and the design is high density. be able to.

In the present embodiment, since the air discharged from the intake fan 40 through the ventilation path 46a is forcibly sent to the auxiliary fan case 58, the auxiliary fan 62 does not necessarily require the auxiliary fan case 58. It can also be used as a ventilation duct.

[0067] Embodiment 3.

Hereinafter, the third embodiment of the present invention will be described only with respect to the difference from the above-described first embodiment with reference to FIG. 9 and FIG.

[0068] In the present embodiment, a lower case 60, which is a part of the auxiliary fan case 58, is formed on the third heating coil 22 side of the intake fan case 46, and this lower portion An auxiliary fan 62 is accommodated in the case 60, and an upper case 64, which is another part of the auxiliary fan case 58, is screwed to the lower case 60. The lower case 60 is formed with an intake port 60a through which air discharged from the intake fans 40, 42 is sucked, and the upper case 64 is discharged from which air discharged from the auxiliary fan 62 is discharged. An outlet 64a is formed.

[0069] Further, a ventilation duct 72 is integrally formed of a resin material on the roaster 30 side of the substrate cover 44d above the control boards 34, 36, and 38, and the ventilation duct 72 is positioned laterally. A first discharge port 72a that opens toward the first heating coil 18 and a second discharge port 72b that opens toward the lower side of the auxiliary fan case 58 positioned rearward are formed.

In the present embodiment, when cooking is performed using the third heating coil 22, a part of the air discharged from the intake fans 40, 42 toward the control boards 34, 36, 38 is Substrate cover A ventilation path A to be sent to the first heating coil 18 through the first discharge port 72a of 44d is formed. Further, the air drawn into the auxiliary fan 62 accommodated in the auxiliary fan case 58 from the second discharge port 72b of the substrate cover 44d through the intake port 60a formed in the lower case 60 of the auxiliary fan case 58. Route B and the air blown by the intake fans 40, 42 to the control boards 34, 36, 38 do not pass through the second discharge port 72b, but below the board cover 44d, the intake fan case 46, and the roaster cover 32. The air is guided to the rear by a ventilation path formed in the space surrounded by the side wall, and is sucked into the auxiliary fan 62 housed in the auxiliary fan case 58 through the intake port 60a formed in the lower case 60 of the auxiliary fan case 58. A ventilation path C is formed, and the air sucked and discharged from the auxiliary fan 62 is discharged upward from the discharge port 64a formed in the upper case 64 of the auxiliary fan case 58.

[0071] 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 is thus magnetically shielded. After the ring 66, the third heating coil 22 and the like are cooled, they are discharged from the exhaust port 16.

[0072] With this configuration, the air sucked into the intake fans 40, 42 is sent to the third heating coil 22 via the two ventilation ducts, so that the air around the control board can be efficiently extracted. If a ventilation path air intake is provided on the upper or upper part of the control board, the third heating coil 22 can be cooled by taking in air with less heat influence on the control board and cooling efficiency is improved.

[0073] It should be noted that the two ventilation ducts efficiently guide a part of the low-temperature cooling air blown out of the intake fans 40, 42, which is one of them, to the third heating coil 22, and is opposite to the intake fan. Cooling air can be smoothly passed through the exhaust port located at Also, if an auxiliary fan is attached to one of these ventilation ducts, the control board is cooled and the heated air can be extracted from the periphery of the control boards 34, 36, 38, and the third heating coil 22 is cooled. it can.

[0074] Also in the present embodiment, since the air discharged from the intake fan 40 is forcibly sent to the auxiliary fan case 58 via the second discharge port 72b, the auxiliary fan 62 is not necessarily required. Case 58 can also be used as a ventilation duct.

[0075] Embodiment 4. Hereinafter, the fourth embodiment of the present invention will be described only with respect to the difference from the first embodiment described above with reference to FIG.

In the present embodiment, a ventilation duct 76 is integrally formed of a resin material in a board case 74 that holds the control boards 34, 36, and 38, and an auxiliary fan (not shown) is formed in the ventilation duct 76. ). The upper control board 34 is provided with a plurality of circuit components 78 and a heat sink 80 as a heat dissipation means, and a ventilation duct 76 is provided in the board case 74 on the side of the intake fan case 46 behind the control board 34. Yes. Further, the ventilation duct 76 is formed with a discharge port 76a opening upward!

[0077] In the present embodiment, when cooking is performed using the third heating coil 22, the upper layer of the air discharged from the intake fans 40, 42 toward the control boards 34, 36, 38 Part of the air that has passed through the control board 34 is sucked into the auxiliary fan via the ventilation duct 76. Further, the air discharged from the auxiliary fan is discharged above the discharge port 64a formed in the ventilation duct 76.

[0078] 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 is thus magnetically shielded. After the ring 66, the third heating coil 22 and the like are cooled, they are discharged from the exhaust port 16.

[0079] As described above, when the intake port of the ventilation path 68 is provided on the windward side of the discharge port 76a or on the windward side of the roaster cover 32, air before the temperature rises due to the heat generated by the roaster 30 is obtained. The force S can be forced to flow near the third heating coil 22 to cool the third heating coil 22.

Industrial applicability

[0080] As described above, since the heating cooker according to the present invention can efficiently cool the heating coil arranged at the rear, the three-neck induction in which two heating coils are provided at the front and one heating coil is provided at the rear. It is useful as a multi-mouth induction heating cooker such as a heating cooker.

Claims

The scope of the claims

[1] A main body, a top plate covering an upper surface of the main body, a first and second heating coils provided below the top plate and positioned in front of the main body, and the first and second heating coils behind the main body. A third heating coil positioned between the two heating coils, and external air is taken into the main body from an air inlet formed on the upper surface of the main body on the rear side of the top plate, and blown forward. The first heating coil Exhaust outlet force provided on the outer surface of the main body on the side, an intake fan for exhausting, a control board disposed in front of the intake fan and driving the first and second heating coils, and the control board An induction heating cooker comprising a substrate cover for covering, wherein the air for cooling the third heating coil is outside the second heating coil and the center of the third heating coil and the intake fan Spout formed between the outer shell Induction heating cooker which characterized in that a ventilation passage for blowing mouth.

[2] A main body, a top plate covering the upper surface of the main body, a first and second heating coils provided below the top plate and positioned in front of the main body, and the first and second heating coils behind the main body. A third heating coil located between the two heating coils, a roaster provided below the first heating coil, and external air is formed on the second heating coil side on the rear upper surface of the main body. A suction fan for exhausting from the exhaust port provided on the outer surface of the main body on the first heating line side, a space on the one star side, and the control board And a mouth that partitions the space on the first heating coil side, and is disposed in front of the intake fan in the space on the side of the roaster partitioned by a side wall of the roaster cover and drives the heating coil. A control board for, An induction heating cooker comprising a substrate cover for covering the control board,

The air blown to the control board by the intake fan is guided rearward by a ventilation path formed in a space surrounded by the board cover, an outer shell of the intake fan, and a side wall of the roaster cover, An induction heating cooker, characterized in that it blows from a discharge port formed at the rear inside the main body and blows air to the third heating coil.

[3] The induction heating cooker according to claim 1 or 2, wherein a discharge port of the ventilation path is formed on a substrate cover that covers an outer shell of the intake fan or the control substrate.

[4] An auxiliary fan for sending air blown out from the outlet of the ventilation path is installed in the main body. The induction heating cooker according to any one of claims 1 to 3.

[5] A main body, a top plate that covers the upper surface of the main body, a first heating coil that is provided below the top plate, is positioned in front of the main body, and the first and second heating coils that are located behind the main body. A third heating coil positioned between the two heating coils, and external air is taken into the main body through an intake port formed on the second heating coil side of the rear upper surface of the main body and blown forward. An intake fan for exhausting air from an exhaust port provided on the outer surface of the main body on the first heating coil side, a control board disposed in front of the intake fan and driving the first and second heating coils; An induction heating cooker provided with a substrate cover that covers the control substrate,

An air duct having a discharge port for blowing out air for cooling the third heating coil from a position behind the main body is provided inside the main body, and a part of the ventilation path is a ventilation duct formed inside the main body. A ventilation passage suction opening that is an intake opening of the ventilation passage is formed in the ventilation duct, an auxiliary fan is attached inside the main body, and the ventilation passage suction opening provided at a position upstream from the discharge opening is provided. An induction heating cooker characterized in that the air sucked into the auxiliary fan is sent to the third heating coil.

6. The induction heating cooker according to claim 5, wherein a part of the ventilation path is outside a ventilation duct formed in an outer shell of the intake fan or the substrate cover.

7. The induction heating cooker according to claim 5, wherein a part of the ventilation path is a ventilation duct formed in a base plate case that holds the control board positioned in front of the intake fan. .

8. The induction heating cooker according to claim 5, wherein the ventilation path intake port is provided on the windward side of the intake fan, and external air is sucked through the intake fan.

[9] A part of the ventilation path is a ventilation duct formed inside the main body, and the ventilation duct is formed with a ventilation path air inlet that is an air inlet of the ventilation path, and an auxiliary fan is attached inside the main body The air sucked into the auxiliary fan is sent to the third heating coil via the air passage intake port provided at a position lower in temperature than the discharge port, and the air passage air intake The induction heating cooker according to claim 2, wherein a mouth is provided on the windward side of the roaster cover.

[10] A main body, a top plate covering the upper surface of the main body, a first and second heating coils provided below the top plate and positioned in front of the main body, and the first and second heating coils behind the main body. A third heating coil positioned between the two heating coils, and external air is taken into the main body through an intake port formed on the second heating coil side of the rear upper surface of the main body and blown forward. An intake fan for exhausting air from an exhaust port provided on the outer surface of the main body on the first heating coil side, a control board disposed in front of the intake fan and driving the first and second heating coils; An induction heating cooker provided with a substrate cover that covers the control substrate,

A ventilation path for blowing out air for cooling the third heating coil is provided inside the main body, and the ventilation path intake port, which is an intake port of the ventilation path, is provided on the side wall of the outer shell of the intake fan. Are formed in a different direction from each other, the ventilation data constituting the ventilation path is formed in the outer shell of the intake fan, and the air sucked into the intake fan is passed through the ventilation path intake port and the ventilation duct. An induction heating cooker characterized by being sent to the third heating coil.

[11] The induction heating cooker according to any one of claims 6, 7, 9, and 10, wherein an auxiliary fan is attached to the ventilation duct.

[12] A main body, a top plate covering the upper surface of the main body, a first and second heating coils provided below the top plate and positioned in front of the main body, and the first and second heating coils at the rear of the main body. A third heating coil positioned between the two heating coils, and external air is taken into the main body through an intake port formed on the second heating coil side of the rear upper surface of the main body and blown forward. An intake fan for exhausting air from an exhaust port provided on the outer surface of the main body on the first heating coil side, a control board disposed in front of the intake fan and driving the first and second heating coils; An induction heating cooker provided with a substrate cover that covers the control substrate,

A ventilation path for blowing out air for cooling the third heating coil is provided inside the main body, and a part of the ventilation path covers the control board located in front of the intake fan. Another air duct that is a part of the air passage is formed in the outer shell of the air intake fan in the vicinity of the air duct, and is sucked into the air intake fan. An induction heating cooker characterized in that the heated air is sent to the third heating coil via the ventilation duct of the substrate cover and the ventilation duct of the outer shell of the intake fan.

13. The induction heating cooker according to claim 12, wherein an auxiliary fan is attached to the ventilation duct formed in the outer shell of the intake fan or the ventilation duct formed in the substrate cover.

[14] A second ventilation duct discharge port is formed in the substrate cover on the front side in the main body from the discharge port of the ventilation path, and the air sucked into the intake fan is supplied to the second ventilation duct discharge port. 9. The method according to claim 1, wherein the first and second heating coils are sent to the third heating coil via the ventilation duct discharge port. The induction heating cooker described in 1.