JP4783244B2 - Induction heating cooker - Google Patents

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.

In order to achieve the above object, the invention according to claim 1 is a main body, a top plate covering an upper surface of the main body, a lower plate of the top plate, and positioned in front of the main body. The first and second heating coils and the third heating coil positioned between the first and second heating coils at the rear of the main body and external air are formed on the upper surface of the main body on the rear side of the top plate. An intake fan for taking in the inside of the main body from the intake port and blowing it forward and exhausting it from an exhaust port provided on the outer surface of the main body on the first heating coil side, and disposed in front of the intake fan and the first and An induction heating cooker comprising a control board for driving a second heating coil and a board cover for covering the control board, wherein air for cooling the third heating coil is used as the second heating coil. Outside of the above 3 center and the suction fan of the heating coil of the air passage for blowing from the outlet formed between the outer shell is provided Rutotomoni, an auxiliary fan for sending air blown from the discharge port of the air passage in said body It is characterized by being provided in.

The invention according to claim 2 is 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 main body. A third heating coil positioned between the first and second heating coils in the rear, a roaster provided below the first heating coil, and external air is passed through the second rear surface of the main body. An intake fan for taking in from the intake port formed on the heating coil side into the main body and blowing it forward and exhausting it from the exhaust port provided on the outer surface of the main body on the first heating coil side, and the space on the roaster side And a roaster cover that partitions the space on the control board and the first heating coil side, and in front of the intake fan in the space on the side of the roaster partitioned by the side wall of the roaster cover. An induction heating cooker comprising a control board that drives the heating coil and a board cover that covers the control board, wherein the intake fan blows air blown toward the control board, the board cover, led backwards ventilation path formed in the enclosed space in the outer shell and the sidewall of the roaster cover the intake fan, while blowing the third heating coil discharged from the body interior rearwardly formed discharge opening An auxiliary fan for sending air blown from the discharge port of the ventilation path is provided in the main body .

  The invention according to claim 3 is characterized in that the discharge port of the ventilation path is formed in a substrate cover that covers an outer shell of the intake fan or the control substrate.

According to a fourth aspect of the present invention, there is provided a main body, a top plate that covers an 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 main body. A third heating coil located between the first and second heating coils in the rear and external air from the intake port formed on the second heating coil side of the rear upper surface of the main body to the inside of the main body An intake fan that blows out in front of the intake and exhausts air from an exhaust port provided on the outer surface of the main body on the first heating coil side, and is disposed in front of the intake fan and drives the first and second heating coils. An induction heating cooker including a control board and a board cover that covers the control board, and a ventilation path having a discharge port for blowing out air for cooling the third heating coil from a position behind the main body. The body A ventilation duct in which a part of the ventilation path is 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 provided inside the main body It is characterized in that the air sucked into the auxiliary fan is sent to the third heating coil through the ventilation passage intake port provided at a position windward from the discharge port.

According to a fifth aspect of the present invention, a part of the ventilation path is a ventilation duct formed in an outer shell of the intake fan or the substrate cover.

According to a sixth aspect of the present invention, a part of the ventilation path is a ventilation duct formed in a board case that holds the control board located in front of the intake fan.

The invention according to claim 7 is characterized in that the ventilation path intake port is provided on the windward side of the intake fan, and external air is sucked through the intake fan.

According to an eighth 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 the main body. A third heating coil positioned between the first and second heating coils in the rear, a roaster provided below the first heating coil, and external air is passed through the second rear surface of the main body. An intake fan for taking in from the intake port formed on the heating coil side into the main body and blowing it forward and exhausting it from the exhaust port provided on the outer surface of the main body on the first heating coil side, and the space on the roaster side And a roaster cover that partitions the space on the control board and the first heating coil side, and in front of the intake fan in the space on the side of the roaster partitioned by the side wall of the roaster cover. An induction heating cooker comprising a control board that drives the heating coil and a board cover that covers the control board, wherein the intake fan blows air blown toward the control board, the board cover, The air is guided to the rear by a ventilation path 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 in the rear of the main body, and blown to the third heating coil. , the portion of the air passage is ventilation ducts formed within said body, mounting the auxiliary fan inside the main body to form the air passage inlet is the inlet port of the air passage to the vent duct, wherein the air sucked into the auxiliary fan through from the discharge port provided at the upwind position the air passage inlet with to send to the third heating coil, the ventilation Michi吸Characterized in that a mouth on the upwind side of the roaster cover.

Furthermore, the invention described in claim 9 is a main body, a top plate that covers an upper surface of the main body, a first and second heating coils that are provided below the top plate and are located in front of the main body, and the main body. A third heating coil located between the first and second heating coils in the rear and external air from the intake port formed on the second heating coil side of the rear upper surface of the main body to the inside of the main body An intake fan that blows forward from the intake fan discharge port and exhausts air from an exhaust port provided on the outer surface of the main body on the first heating coil side, and is disposed in front of the intake fan and the first and second An induction heating cooker provided with a control board for driving the heating coil and a board cover for covering the control board, wherein a ventilation path for blowing out air for cooling the third heating coil is provided inside the main body. ,in front A ventilation path intake port, which is an intake port of the ventilation path, is formed in a direction different from the intake fan discharge port on the side wall of the outer shell of the intake fan, and the ventilation duct constituting the ventilation path is formed outside the intake fan. Air formed in a shell and sucked into the intake fan is sent to the third heating coil via the ventilation passage intake and the ventilation duct.

The invention described in claim 10 is characterized in that an auxiliary fan is attached to the ventilation duct.

According to an eleventh aspect of the present invention, there is provided 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 main body. A third heating coil located between the first and second heating coils in the rear and external air from the intake port formed on the second heating coil side of the rear upper surface of the main body to the inside of the main body An intake fan that blows out in front of the intake and exhausts air from an exhaust port provided on the outer surface of the main body on the first heating coil side, and is disposed in front of the intake fan and drives the first and second heating coils. An induction heating cooker including a control board and a board cover that covers the control board, wherein a ventilation path for blowing out air for cooling the third heating coil is provided inside the main body, and the ventilation path Some of the above A ventilation duct formed in a board cover that covers the control board located in front of an air fan, and another ventilation duct that is a part of the ventilation path is formed in an outer shell of the intake fan in the vicinity of the ventilation duct The air sucked into the intake fan is sent to the third heating coil through the ventilation duct of the substrate cover and the ventilation duct of the outer shell of the intake fan.

According to a twelfth aspect of the present invention, 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.

Further, in the invention described in claim 13 , 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 In addition to being sent to the first heating coil via the second ventilation duct discharge port, it is sent to the third heating coil via the ventilation duct discharge port.

  According to the present invention, air for cooling the third heating coil is blown out from the discharge port formed between the center of the third heating coil and the outer shell of the intake fan outside the second heating coil. Because the ventilation path is provided, a pressure difference occurs between the periphery of the outer shell of the intake fan and the exhaust port due to the intake and exhaust action of the intake fan, and the wind blown from the discharge port near the intake fan is more exhausted than the discharge port. It flows in the direction of the third heating coil on the side, and a sufficient amount of air for cooling the third heating coil can be secured and can be efficiently cooled.

  In addition, the wind blown out by the intake fan to the control board is guided rearward by a ventilation path formed in the space surrounded by the board cover, the outer shell of the intake fan and the side wall of the roaster cover, and is formed at the rear inside the main body. When the air is blown from the discharged outlet to the third heating coil, a part of the cooling air blown out from the intake fan is efficiently guided to the third heating coil, and smoothly flows to the exhaust outlet located on the opposite side of the intake fan. Cooling air can be passed for cooling.

  In addition, if the discharge port of the ventilation path is formed in the substrate cover that covers the outer shell of the intake fan or the control board, the discharge port and the ventilation path are provided at the same time by attaching these components to the main body. Mounting can be performed or assembly can be improved.

  Further, if 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.

  Also, 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 constituted by a ventilation duct formed in the outer shell of the intake fan, When an auxiliary fan is attached to the substrate cover and the air sucked into the auxiliary fan is sent to the third heating coil through the ventilation path intake port provided on the windward side from the discharge port, the low temperature air is supplied. The third heating coil can be forced to flow in the vicinity of the third heating coil to cool the third heating coil, and the cooling efficiency is improved. Further, if an auxiliary fan is provided, the third heating coil can be forcibly cooled with the required amount of airflow, and the exhaust resistance of the intake fan can be reduced and the speed of the intake fan need not be increased more than necessary. Is reduced.

  Further, a part of the ventilation path is a ventilation duct formed in the outer shell of the intake fan or the board cover, or a ventilation duct formed in a board case holding the control board located in front of the intake fan. And the assemblability at the time of providing a ventilation path in a main body improves, and it can design a high density.

  In addition, when the 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 cool the third heating coil. can do.

  In addition, when the air passage inlet 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 so that the third heating coil Can be cooled.

  In addition, a ventilation path intake port that is an intake port 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, and the ventilation path If the air duct that forms the air duct 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 through the air passage inlet and the air duct, the structure is simplified. The third heating coil can be cooled with air at room temperature. In this case, if the third auxiliary fan for cooling the heating coil is further provided, the burden on the intake fan can be reduced, so that the cost is low and the noise is low.

  In addition, when the auxiliary fan is fixed to the outer shell or the substrate cover of the intake fan, the assemblability when the auxiliary fan is attached to the main body can be improved and a high-density design can be achieved.

  In addition, a part of the ventilation path is composed of a ventilation duct formed on the board cover that covers the control board located in front of the intake fan, and another ventilation duct that is a part of the ventilation path is formed on the outer shell of the intake fan Then, if the air sucked into the intake fan is sent to the third heating coil through the two ventilation ducts, the air around the control board can be efficiently extracted, and the ventilation path on the windward or upper part of the control board. If the intake portion is provided, the air that has little heat influence on the control board can be taken in and the third heating coil can be cooled, so that the cooling efficiency is improved. In addition, if an auxiliary fan is provided in the outer shell of the intake fan, the air flow can be forced to increase and cool the third heating coil, and the exhaust fan's exhaust resistance can be reduced to increase the speed of the intake fan more than necessary. Noise does not need to be reduced.

  Also, 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 heating air via the second ventilation duct discharge port. When the air is sent to the coil and sent to the third heating coil via the air passage discharge port, a part of the air passage is a ventilation duct formed in the board case holding the control board located in front of the intake fan. When configured and an auxiliary fan is attached to the ventilation duct, the control board is cooled and the warmed air can be extracted from the periphery of the control board, and the third heating coil can be cooled.

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

  Inside the main body 2 corresponding to the heating units 8, 10, and 12, first and second heating coils 18 and 20 that constitute induction heating means are disposed below the top plate 4 and are biased forward. A third heating coil 22 is disposed at a position biased backward between the two heating coils 18 and 20. These three heating coils 18, 20, and 22 are mounted on coil bases 24, 26, and 28, respectively.

  Below the first heating coil (the left heating coil in FIG. 1) 18 provided on the exhaust port 16 side, a roaster 30 having an opening on the front surface of the main body and incorporating a heater heats fish and the like. A roaster cover 32 as a partition plate that shields heat from the roaster 30 is formed between the control boards 36 and 38 and the roaster 30 and between the first heating coil 18 and the roaster. 30 is interposed. That is, the roaster 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. A gap for heat insulation is provided on the upper surfaces of the roaster cover 32 and the roaster 30.

  On a roaster cover 32 formed with a horizontal portion and a vertical wall portion by bending a metal plate such as an iron plate, a plurality (for example, three) for supporting the coil base 24 on which the first heating coil 18 is placed. 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 (the intake port 14 side). Further, a space partitioned by the side wall of the roaster cover 32, the substrate cover 44 d (substrate fan cover 44), and the main body side wall portion 2 a below the second heating coil 20 on the side of the roaster 30 (intake port 14 side). The three control boards 34, 36, and 38 having electronic components for controlling the first to third heating coils 18, 20, and 22 are disposed in a vertically stacked manner, and then On the side, a plurality of (for example, two) centrifugal 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. .

  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. In addition, since the frequency of use of the three heating coils 18, 20 and 22 is low, the rated output of the third heating coil 22 arranged at the rear is set to be the smallest. A control board 38 for controlling the heating coil 22 is disposed in the intermediate layer.

  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 circuit component such as a switching element or a diode bridge (power module) that is a heat generating component is formed in the upper step 38a. In addition to mounting, a second circuit component such as a resonant capacitor, which is a heat generating component, is mounted on the lower stage 38b to improve the cooling efficiency by equalizing the temperature rise distribution. 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.

  Also, a board cover 44d provided to cover the control boards 34, 36, 38 from above and a fan cover 44e provided to form the outer shell of the intake fans 40, 42 and cover the upper part thereof are integrally formed. The board fan cover 44 thus formed is substantially the same height as the upper surface (horizontal plane) of the roaster cover 32, forms the outer shell of the intake fans 40, 42 and covers the sides thereof, the intake fan case 46, the roaster cover 32, the outside of the main body It 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 of the shell and the front wall portion 2b of the outer shell of the main body.

  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. On the substrate cover 44d, 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. The coil base 26 is topped by a spring 50 fitted and attached to the support member 48 in a state where a cylindrical contact portion (not shown) and an elastic member (not shown) provided thereon are in contact. The distance between the second heating coil 20 and the back surface of the top plate 4 is ensured by being pressed by the back surface (lower surface) of the plate 4.

  The board fan cover 44 positioned above the intake fan 40 is integrally formed with a resin cover with a fan cover 44e protruding upward, and external air taken in from the intake port 14 is Then, the air is sucked into the intake fans 40 and 42 from the intake portion 44a provided inside the fan cover 44e. 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 supports the coil base 28 on which the third heating coil 22 is placed. One of the plurality of (for example, three) supporting members 52 is integrally formed of a resin material in the state of being close to the upper portion of the side wall (vertical wall) of the intake fan case 46 in the substrate fan cover 44.

  Further, 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. The ventilation duct 53 is divided into front and rear, and a ventilation path intake port 53a is formed in the rear and a ventilation path discharge port 53b is formed in the front.

  Further, 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, and the auxiliary fan 62 is formed in the lower case 60. An upper case 64 that is housed and is another part of the auxiliary fan case 58 is screwed to the lower case 60. The upper case 64 behind the auxiliary fan 62 is formed with an intake port 64b located immediately below the intake port 53a of the ventilation duct 53 formed integrally with the fan cover 44, and above the auxiliary fan 62. The upper case 64 is formed with a discharge port 64 a located immediately below the discharge port 53 b of the ventilation duct 53.

  As shown in FIG. 6, on the roaster cover 32 below the third heating coil 22, two columnar support members 54 for supporting the coil base 28 are vertically formed at positions indicated by broken lines. The coil base 28 is in a state in which the cylindrical contact portion 28c and the elastic member 28d provided thereon are in contact with each other by the spring 56 attached to the two support members 54 and the one support member 52 described above. The third heating coil 22 is pressed against the back surface (lower surface) of the top plate 4, and the distance between the third heating coil 222 and the back surface of the top plate 4 is secured.

  As shown in FIGS. 4 and 6, an annular magnetic shield ring 66 is placed on the outer coil base 28 of the third heating coil 22. A substantially triangular extending portion 28a extending upward from the fan cover 44e is integrally formed so as to substantially face the discharge port 53b of the ventilation duct. The extending portion 28a is supported by the above-described support member 52 formed on the substrate 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. Since the magnetic shield ring generates heat, the temperature of the portion 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 portion, there is no problem even if the dimension of the resin portion changes due to secular change, but there is a risk that the screw will loosen in the screwed portion. This attachment method of the magnetic shield ring 66 prevents the coil base 28 or the magnetic shield ring 66 from being deformed due to thermal expansion, and also secures the magnetic shield ring 66 to be fixed by screwing it on the wind with little temperature change. The coil base 28 may be provided with a plurality of locking portions, and at least one portion of the magnetic shielding ring 66 may be screwed to the coil base 28 on the windward side.

  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 heating coil 22 is held 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 28 a of the coil base 28 flows.

  Further, the two support members 54 that are vertically attached to 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. ing. 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, if a high-frequency 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 broken line arrows in FIG. 2. The The air discharged from the intake fans 40, 42 passes over the control boards 34, 36, 38 laminated in three layers, and a part thereof is an opening 44b formed in the board cover 44d above the control board 34. , 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 storage portion of the operation portion 35, and further roaster After passing through the upper front part of 30 and cooling each part, it is discharged from the exhaust port 16.

  As shown in FIG. 2, since the intake fans 40 and 42 are formed on both sides of the intake fan motor 41, among the three-layer control boards 34, 36, and 38, the intermediate-layer control board 36 is Since the amount of air flowing is smaller than that of the upper or lower control boards 34 and 38, the intermediate layer has a two-stage configuration to improve the 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 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.

  In addition, since power is supplied to the auxiliary fan 62 at the same time as power is supplied to the intake fans 40 and 42, air is also taken in and taken in from the air passage inlet 53 a of the air duct 53 dedicated to the third heating coil 22. After the air is sucked into the auxiliary fan 62 through the air inlet 64b formed in the upper case 64 of the auxiliary fan case 58, the air outlet of the ventilation duct 53 is discharged through the outlet 64a formed in the upper case 64. It is discharged above 53b.

  Further, the air discharged above the discharge port 53b passes through the ventilation path 68 formed in the extension part 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.

  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 and 42 (the fan cover 44e and the intake air). Since the ventilation path (path from the ventilation path intake port 53a to the discharge port 53b) that blows out from the discharge port 53b formed between the fan case 46) and the intake fan 40 and 42 is provided. , 42 has a pressure difference between the periphery of the outer shell and the exhaust port 16, and the wind blown from the discharge port 53b in the vicinity of the outer shell of the intake fans 40, 42 is closer to the exhaust port 16 than the discharge port 53b. Since it flows in the direction of a certain third heating coil 22, it is possible to secure a sufficient amount of air for cooling the third heating coil 22, and to cool it efficiently.

  Further, since the discharge port 53b of the ventilation path is formed by the fan cover 44e that forms the outer shell of the intake fans 40, 42, the discharge port 53b and the ventilation path are provided at the same time by mounting these components in the main body. Therefore, high-density mounting can be performed, or assemblability can be improved. 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.

  Also, 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 formed in the outer shell of the intake fan (the intake fan case 46 and the intake fan cover 44d). The auxiliary fan 62 is configured by a ventilation duct (the ventilation duct 53 and the auxiliary case 58), the auxiliary fan 62 is attached to the outer shell of the intake fan, and the auxiliary fan 62 is provided via the ventilation path intake port 53a provided on the windward side from the discharge port 53b. When the air sucked into the third heating coil 22 is sent to the third heating coil 22, the third heating coil 22 can be cooled by forcibly flowing low-temperature air in the vicinity of the third heating coil 22, and cooling efficiency Will improve. When the ventilation path intake port 53a is provided on the windward side of the intake fans 40 and 42 as in the present embodiment and external air is sucked through the intake fans 40 and 42, air close to room temperature is supplied to the third heating coil 22. It 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 substrate cover 44d instead of the outer shell of the intake fan, and the position inside the main body windward than the discharge port 53b (for example, near the discharge port of the intake fans 40 and 42 or the control board 34). , 36, and 38) may be provided with a ventilation passage intake port 53a.

  In the above-described embodiment, the substrate cover and the fan cover are integrated with the resin material to form the substrate fan cover so that the assemblability is improved. However, it is not always necessary to form the substrate cover and the fan cover separately. It is good.

Embodiment 2. FIG.
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.

  In the first embodiment described above, the dedicated ventilation duct 53 for cooling the third heating coil 22 is formed integrally with the fan cover 44. However, in this embodiment, the ventilation duct 53 is not provided. A ventilation path 46 a is formed in the upper part of the intake fan case 46.

  Further, 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 lower case 60 is shown in FIG. 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. 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 discharged. It is discharged upward through the outlet 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, while the discharged air is A part of the air is sucked into the auxiliary fan 62 through a ventilation path 46 a formed in the intake fan case 46. The air sucked into the auxiliary fan 62 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 via the discharge port 64a formed in the upper case 64. After passing through and cooling the magnetic shield ring 66, the third heating coil 22, etc., they are discharged from the exhaust port 16.

  As described above, the intake fan discharge port on the side wall of the intake fan case 46 that is the outer shell of the intake fan is used as the intake port 46a that is the intake port of the ventilation path that blows out the air for cooling the third heating coil 22. A ventilation duct (auxiliary fan case 58) communicating with the ventilation path is formed in an intake fan case 46, which is an outer shell of the intake fans 40, 42, and is sucked into the intake fans 40, 42. If the air is sent to the third heating coil 22 through the ventilation passage intake 46a and the ventilation duct (auxiliary fan case 58), not only the configuration becomes simple but also the third heating coil 22 with air at room temperature. Can be cooled. In this case, if the auxiliary fan 62 for cooling the third heating coil 22 is further provided, the burden on the intake fans 40 and 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 shells of the intake fans 40 and 42 (may be fixed to the board cover 44d), the assembly performance when the auxiliary fan 62 is attached to the main body is improved and a high-density design is made. Can do.

  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 is not necessarily required, and the auxiliary fan case 58 is provided with a ventilation duct. It can also be used as

Embodiment 3 FIG.
Hereinafter, the third embodiment of the present invention will be described only with respect to the differences from the first embodiment described above with reference to FIGS. 9 and 10.

  In the present embodiment, a lower case 60, which is a part of the auxiliary fan case 58, is formed integrally with the intake fan case 46 on the third heating coil 22 side. 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. The lower case 60 is formed with an intake port 60a through which air discharged from the intake fans 40 and 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.

  A ventilation duct 72 is integrally formed of a resin material on the side of the substrate cover 44d above the control board 34, 36, 38 on the roaster 30 side, and the ventilation duct 72 has a first located laterally. A first discharge port 72a that opens toward the heating coil 18 and a second discharge port 72b that opens toward the lower side of the auxiliary fan case 58 located 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 in the board cover 44d. The ventilation path A sent to the 1st heating coil 18 through the 1st discharge port 72a is formed. Also, a ventilation path B that is sucked 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, The air blown by the intake fans 40, 42 to the control boards 34, 36, 38 is surrounded by the side walls of the board cover 44d, the intake fan case 46 and the roaster cover 32 without passing through the second discharge port 72b. The ventilation path C is guided rearward by a ventilation path formed in the space, and is sucked into the auxiliary fan 62 accommodated in the auxiliary fan case 58 through the intake port 60a formed in the lower case 60 of the auxiliary fan case 58. The air sucked and discharged from the auxiliary fan 62 is above the discharge port 64a formed in the upper case 64 of the auxiliary fan case 58. It is discharged.

  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.

  With this configuration, the air sucked into the intake fans 40 and 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, and the control board If the ventilation path intake part is provided on the windward side or the upper part, air with less heat influence of the control board can be taken in and the third heating coil 22 can be cooled, and the cooling efficiency is improved.

  Any one of the two ventilation ducts may be used, and part of the cooling air blown out from the intake fans 40 and 42 is efficiently guided to the third heating coil 22 and is located on the opposite side of the intake fan. Cooling air can be smoothly flowed through the exhaust port for cooling. If an auxiliary fan is attached to any of the ventilation ducts, the air heated by cooling the control board can be extracted from the vicinity of the control boards 34, 36, and 38, and the third heating coil 22 can be cooled.

  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. It can also be used as a ventilation duct.

Embodiment 4 FIG.
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 accommodated in the ventilation duct 76. ing. A plurality of circuit components 78 and a heat sink 80 as a heat radiating means are attached to the upper control board 34, 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. . The ventilation duct 76 has a discharge port 76a that opens upward.

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

  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.

  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, the air before the temperature rises due to the heat generated by the roaster 30 is third. The third heating coil 22 can be cooled by forcibly flowing in the vicinity of the heating coil 22.

  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. It is useful as a multi-mouth induction heating cooker.

The exploded perspective view of the induction heating cooking appliance concerning Embodiment 1 of the present 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. 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 The disassembled perspective view of the 3rd heating coil, fan cover, and intake fan case which were provided in the induction heating cooking appliance concerning Embodiment 2 of this invention. The disassembled perspective view of the 3rd heating coil, fan cover, and intake fan case which were provided in the induction heating cooking appliance concerning Embodiment 3 of this invention. The perspective view when the auxiliary fan case shown in FIG. 9 is viewed from below The disassembled perspective view of the 3rd heating coil, fan cover, and board | substrate case which were provided in the induction heating cooking appliance concerning Embodiment 4 of this invention.

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 elastic member,
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, 41 Intake fan motor,
43 heat sink, 44 substrate fan cover, 44a air intake,
44b, 44c Opening 44d Substrate cover, 44e Fan cover,
46 Intake fan case, 46a Ventilation path, 48 Support member, 50 Spring,
52 support member, 53 ventilation duct, 53a air inlet, 53b air outlet,
54 support members, 56 springs, 58 auxiliary fan cases, 60 lower cases,
60a Intake port, 62 Auxiliary fan, 64 Upper case, 64a Discharge port,
64b Intake port, 66 Magnetic shielding ring, 68 Ventilation path, 70 Coil holder,
72 ventilation duct, 72a first discharge port, 72b second discharge port,
74 Substrate case, 76 Ventilation duct, 76a Discharge port, 78 Circuit parts,
80 Heat sink.

Claims (13)

A main body, a top plate that covers the upper surface of the main body, a first and second heating coils that are provided below the top plate and are located 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 first heating coil and the outside of the top plate. The main body on the first heating coil side An intake fan for exhausting air from an exhaust port provided on the outer surface, a control board that is disposed in front of the intake fan and that drives the first and second heating coils, and a board cover that covers the control board. Induction heating cooker,
Ventilation path for blowing out air for cooling the third heating coil from the discharge port formed between the center of the third heating coil and the outer shell of the intake fan outside the second heating coil. the provided Rutotomoni, the induction cooking device, characterized in that an auxiliary fan for sending air blown from the discharge port of the air passage is provided in said body. A main body, a top plate that covers the upper surface of the main body, a first and second heating coils that are provided below the top plate and are located in front of the main body, and the first and second heating coils at the rear of the main body A third heating coil located between the first heating coil, a roaster provided below the first heating coil, and external air from an intake port formed on the second heating coil side on the rear upper surface of the main body. An intake fan for taking air into the main body and blowing it forward and exhausting it from an exhaust port provided on the outer surface of the main body on the first heating coil side, the space on the roaster side, the control board, and the first heating coil A roaster cover that partitions the space on the side of the fan and a space disposed on the side of the roaster that is partitioned by a side wall of the roaster cover and disposed in front of the intake fan to drive the heating coil A control board, an induction heating cooker provided with 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, the outer shell of the intake fan and the side wall of the roaster cover, Induction heating cooking characterized in that an auxiliary fan is provided inside the main body for blowing air from a discharge port formed at the rear to the third heating coil and sending air blown from the discharge port of the ventilation path vessel.   The induction heating cooker according to claim 1 or 2, wherein a discharge port of the ventilation path is formed in a substrate cover that covers an outer shell of the intake fan or the control substrate. A main body, a top plate that covers the upper surface of the main body, a first and second heating coils that are provided below the top plate and are located in front of the main body, and the first and second heating coils at the rear of the main body A third heating coil located between the first heating coil side and the outside 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, a control board disposed in front of the intake fan for driving the first and second heating coils, and a board cover covering the control board An induction heating cooker comprising:
A ventilation duct having a ventilation path having a discharge port for blowing out air for cooling the third heating coil from a position behind the body in the body, and a part of the ventilation path is a ventilation duct formed in the body. A ventilation passage inlet that is an inlet of the ventilation passage is formed in the ventilation duct, an auxiliary fan is attached inside the main body, and the ventilation duct is provided through the ventilation passage inlet provided at a position on the windward side from the discharge outlet. An induction heating cooker characterized in that air sucked into the auxiliary fan is sent to the third heating coil. The induction heating cooker according to claim 4 , wherein a part of the ventilation path is a ventilation duct formed in an outer shell of the intake fan or the substrate cover. 5. The induction heating cooker according to claim 4 , wherein a part of the ventilation path is a ventilation duct formed in a board case that holds the control board located in front of the intake fan. The induction heating cooker according to claim 4 , 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. A main body, a top plate that covers the upper surface of the main body, a first and second heating coils that are provided below the top plate and are located in front of the main body, and the first and second heating coils at the rear of the main body A third heating coil located between the first heating coil, a roaster provided below the first heating coil, and external air from an intake port formed on the second heating coil side on the rear upper surface of the main body. An intake fan for taking air into the main body and blowing it forward and exhausting it from an exhaust port provided on the outer surface of the main body on the first heating coil side, the space on the roaster side, the control board, and the first heating coil A roaster cover that partitions the space on the side of the fan and a space disposed on the side of the roaster that is partitioned by a side wall of the roaster cover and disposed in front of the intake fan to drive the heating coil A control board, an induction heating cooker provided with 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, the outer shell of the intake fan and the side wall of the roaster cover, A blower is blown out from a discharge port formed at the rear, blows to the third heating coil, and a part of the ventilation path is a ventilation duct formed inside the main body, and the ventilation duct is connected to an intake port of the ventilation path. A certain ventilation path intake port is formed and an auxiliary fan is attached inside the main body, and the air sucked into the auxiliary fan through the ventilation path intake port provided at a position windward from the discharge port is An induction heating cooker characterized in that it is sent to a heating coil, and the air passage inlet is provided on the windward side of the roaster cover . A main body, a top plate that covers the upper surface of the main body, a first and second heating coils that are provided below the top plate and are located 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 first heating coil and the outside 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 from the intake fan discharge port . An intake fan for exhausting air from an exhaust port provided on the outer surface of the main body on the one heating coil side, a control board disposed in front of the intake fan and driving the first and second heating coils, and the control An induction heating cooker provided with a substrate cover that covers the substrate,
A ventilation path for blowing out air for cooling the third heating coil is provided inside the main body, and a ventilation path intake port that is an intake port of the ventilation path is the intake fan discharge port on the side wall of the outer shell of the intake fan. And a ventilation duct that forms 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 a third heating coil. Induction heating cooker according to any one of claims 5, 6, 8, 9, characterized in that fitted with auxiliary fans to the air duct. A main body, a top plate that covers the upper surface of the main body, a first and second heating coils that are provided below the top plate and are located in front of the main body, and the first and second heating coils at the rear of the main body A third heating coil located between the first heating coil side and the outside 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, a control board disposed in front of the intake fan for driving the first and second heating coils, and a board cover covering the control board An induction heating cooker comprising:
Ventilation path formed in a board cover that covers the control board that is provided in the main body with a ventilation path for blowing out air for cooling the third heating coil, and a part of the ventilation path is 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 the air sucked into the air intake fan and the air intake duct of the board cover and the air intake An induction heating cooker characterized in that it is sent to the third heating coil through a ventilation duct in the outer shell of the fan. Induction heating cooker according to claim 1 1, characterized in that fitted with auxiliary fan shell ventilating duct or the ventilating ducts formed in the substrate cover of said suction fan. A second ventilation duct discharge port is formed in the substrate cover on the near side in the main body from the discharge port of the ventilation path, and the air sucked into the intake fan is passed through the second ventilation duct discharge port. The induction heating cooker according to claim 11 or 12 , wherein the induction heating cooker is sent to the first heating coil and sent to the third heating coil via the ventilation duct discharge port.

Images