JP2012038649A - Electromagnetic induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic induction heating cooker which can improve the flow of cooling air during suction and prevent water from flowing into a circuit board, etc. even when water penetrates from a suction port.SOLUTION: The electromagnetic induction heating cooker comprises a motor case 12 having a through hole on one side thereof and containing internally an drainage outlet; a motor provided in the motor case, generally centered on the shaft center of the through hole; a fan 15 fitted to the revolving shaft of the motor, which is disposed on the outside of the through hole of the motor case 12; a board storage case installed on the motor case 12, having the fan 15 rotatably accommodated therein between it and the motor case 12; an air intake duct provided in the motor case 12, which includes a suction port 11b serving as a cooling air introduction port to the inside of the motor case 12; and a motor case air intake section 16 located on the downstream of the suction port 11b in the motor case 12, which supplies cooling air to the fan 15. The air intake duct is designed in such a way that its aperture in a space from the motor case air intake section 16 to the suction port 11b continuously increases as it approaches the suction port 11b.

Description

  The present invention relates to an electromagnetic induction heating cooker that induction-heats an object to be heated by a heating coil.

  Some conventional induction heating cookers use a cooling fan to cool cooling air sucked through an intake duct by feeding it into a heating coil, a circuit board, or the like (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-50716 (page 4, FIG. 2)

  The intake duct of the conventional electromagnetic induction heating cooker described above has an intake port facing upward, extends in a vertical direction from the intake port, is bent at a substantially right angle, and is connected to the intake port of the cooling fan. In such an air intake duct, when a user accidentally flows a large amount of water into the air intake, the water falls inside the air intake duct, is flipped at the horizontal part, is sucked by the cooling fan, and is scattered. In such a state, the circuit board may enter and cause a failure of the circuit board. Further, since the intake duct is bent at a substantially right angle, the portion is bent and pressure loss occurs, and the cooling air suction efficiency is lowered.

  The present invention has been made to solve the above-described problems, and improves the flow of cooling air during suction, and even if liquid such as water enters from the air inlet, An object of the present invention is to obtain an electromagnetic induction heating cooker that can prevent the intrusion of water.

  The electromagnetic induction heating cooker according to the present invention includes a motor case having a through hole on one side and further having a drain outlet therein, a motor provided in the motor case with the axis of the through hole as a substantial center, a motor Installed on the motor case, a fan that is placed outside the through-hole of the case and attached to the motor's rotating shaft, a board storage case that is mounted on the motor case, and the fan is rotatably stored between the motor case and the motor case An air intake duct having an air inlet that serves as a cooling air inlet into the motor case, and a motor case air intake section on the downstream side of the air inlet in the motor case for supplying cooling air to the fan, The air intake duct is such that the space from the motor case air intake to the air intake is continuous so that the diameter gradually increases as it approaches the air intake. A.

  According to the present invention, the intake duct provided on the suction side of the motor case is such that the space from the motor case intake part to the intake port is continuous so that the diameter gradually increases as it approaches the intake port. Even if liquid such as water accidentally flows into the intake port, the liquid can smoothly flow without splashing by the inclined portion of the intake duct. For this reason, since the liquid is not sucked into the fan due to the splashing of the liquid, it is possible to prevent the liquid from entering the substrate storage case. Moreover, since the bending pressure loss of the cooling air sucked from the intake port can be suppressed, the intake efficiency can be increased.

It is a perspective view of the cooker main body which shows the state which removed the top plate and heating source of the electromagnetic induction heating cooking appliance which concerns on embodiment of this invention. It is a perspective view which shows the fan apparatus for cooling, the board | substrate storage case, and the cooling duct in the electromagnetic induction heating cooking appliance of embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the cooling fan apparatus and board | substrate storage case of Embodiment 1 of this invention. 1 is an external perspective view of a cooling fan device according to a first embodiment of the present invention. It is the external view seen from the rear surface side of the intake duct of the cooling fan apparatus of Embodiment 1 of this invention. It is the external view which looked at the cooling fan apparatus of Embodiment 1 of this invention from upper direction. It is the side view which looked at the fan apparatus for cooling of Embodiment 1 of this invention from the motor attachment surface back side. It is sectional drawing of the AA cross section shown in FIG. It is the schematic diagram which represented typically the flow of the water to the air intake duct of the cooling fan apparatus of Embodiment 1 of this invention, and the flow of a wind. It is sectional drawing of the intake duct of the cooling fan apparatus of Embodiment 2 of this invention. It is sectional drawing of the intake duct of the cooling fan apparatus of Embodiment 3 of this invention. It is the external view which looked at the cooling fan apparatus of Embodiment 4 of this invention from upper direction. It is the side view which looked at the fan apparatus for cooling of Embodiment 4 of this invention from the motor attachment surface back side.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a cooker body showing a state in which a top plate and a heating source of an electromagnetic induction heating cooker according to an embodiment of the present invention are removed, and FIG. 2 is an electromagnetic induction heating cooker according to an embodiment of the present invention. It is a perspective view which shows the fan apparatus for cooling in, a board | substrate storage case, and a cooling duct.
In the respective drawings, the same or corresponding parts are denoted by the same reference numerals, and a part of the description is omitted.

  As shown in FIG. 1, the main body case 2 of the cooker main body 1 is formed in a rectangular shape having an opening at the top. The upper opening is configured to be covered with a top plate. Inside the main body case 2 are left and right partition plates 3R and 3L extending in the front-rear direction on both sides, a horizontal partition plate 4 partitioning the entire space between the left and right partition plates 3R and 3L into two upper and lower spaces, and a horizontal partition plate 4 is provided with a rear partition plate 5 that is bent upward at a right angle from the rear end portion 4 and has both ends in contact with the left and right partition plates 3R and 3L. The left and right partition plates 3R and 3L are provided with cutouts 3a and 3b at the top. The notches 3a and 3b are provided so as not to collide with a cooling duct, which will be described later, when it is installed horizontally. The rear partition plate 5 is provided with two exhaust holes 5a.

  Each space partitioned by these partition plates forms a right cooling chamber 6R and a left cooling chamber 6L, an upper part chamber 7, and an exhaust chamber 8. These chambers are not completely isolated from each other. For example, the right cooling chamber 6R, the left cooling chamber 6L, and the upper component chamber 7 communicate with each other by the notches 3a and 3b. The exhaust chamber 8 communicates with the two exhaust holes 5a. For example, three heating coils are arranged above the horizontal partition plate 4, and a grill heating chamber 9 is provided in a space below the heating coils. The grill heating chamber 9 is a substantially independent sealed space when the grill door 9a is closed, but communicates with an external space of the main body case 2, that is, an indoor space such as a kitchen via the exhaust duct 9b. Yes.

  In the right cooling chamber 6R and the left cooling chamber 6L described above, as shown in FIG. 2, the cooling fan device 11 and the substrate storage case 21 connected to the cooling fan device 11 are stored and fixed. Two cooling air discharge ports 22 c and 22 d provided on the upper part of the substrate storage case 21 are connected to the cooling duct 31 described above. The cooling duct 31 is installed in the horizontal partition 4 in a state of straddling the notches 3a and 3b of the left and right partition plates 3R and 3L. The cooling duct 31 is, for example, a structure in which an upper case that is an integrally molded product of plastic and a lower case that is also an integrally molded product of plastic are overlapped and fixed with screws. On the upper surface of the upper case, there are provided a plurality of jet ports 31a for blowing cooling air to the upper heating coil and a rectangular ventilation port 31b for sending cooling air to electronic components such as a liquid crystal display device.

Next, the configuration of the cooling fan device 11 and the substrate storage case 21 will be described with reference to FIGS. FIG. 3 is an exploded perspective view showing the cooling fan device and the substrate storage case according to the first embodiment of the present invention, and FIG. 4 is an external perspective view of the cooling fan device according to the first embodiment of the present invention.
The cooling fan device 11 is configured by combining motor cases 12 and 14, a motor 13, and a sirocco fan (sometimes simply referred to as a fan) 15. The motor cases 12 and 14 and the sirocco fan 15 described above are formed of plastic, for example.

  The motor case 12 is configured to extend upward from one side (suction side) of the cylindrical air passage 12a when viewed from the opening 12b side, and a cylindrical air passage 12a having a substantially circular opening 12b on one side. It communicates with the cylindrical air passage portion 12a, constitutes a part of an intake duct 11a to be described later, and comprises a motor mounting surface rear side duct constituting portion 12c provided on the rear side to which the motor 13 is mounted. . A drain port 12d extending toward the opening 12b is provided on the lowest surface of the cylindrical air passage 12a. The drain port 12d is in a state where the surface on the other motor case 14 side is opened.

  The motor case 14 has a circular through hole 14b that is substantially centered on the axis of the opening 12b of the cylindrical air passage portion 12a, and sucked air that fits with the end surface on the opening 12b side of the cylindrical air passage portion 12a. A fan mounting surface side duct configuration portion 14c that forms part of the passage portion 14a and a later-described intake duct 11a, and is provided on the side where the sirocco fan 15 is mounted, and a fan mounting surface side duct configuration of the suction air passage portion 14a A plate-like cover 14d provided on one side extending in a substantially right-angle direction from the portion 14c, and a through hole 14b of the suction air passage portion 14a are arranged around the axis center of the through hole 14b, and a peripheral portion of the through hole 14b And a motor support plate 14f supported by three support members 14e fixed to the base plate.

  The motor 13 is fixed to the motor support plate 14f through the rotation shaft 13a through a hole provided in the center. A sirocco fan 15 is press-fitted to the tip of the rotating shaft 13a penetrating the hole of the motor support plate 14f. After fixing the motor 13 to the motor support plate 14f provided in the suction air passage portion 14a of the motor case 14 and attaching the sirocco fan 15 to the rotating shaft 13a of the motor 13, the opposite side of the sirocco fan 15 of the motor case 14 4 are assembled together so as to be closed by the motor case 12 and coupled by a fixing tool such as a screw, the cooling fan device 11 as shown in FIG. 4 is assembled. When the cooling fan device 11 is assembled, the motor mounting surface rear side duct component 12c on the motor case 12 side and the fan mounting surface side duct component 14c on the motor case 14 side are in close contact with each other, Both of them constitute an intake duct 11a having an upward intake port 11b.

  The above-described substrate storage case 21 is formed as an integral structure by combining two plastic half-cases 22 and 23 and connecting them with a fixing tool such as a screw. Of the two cases 22, 23, one case 22 includes an annular fan cover 22a that covers the sirocco fan 15 of the cooling fan device 11, and an opening 22b that is open on the peripheral surface of the fan cover 22a on the sirocco fan 15 side. And are provided. When the case 22 is assembled to the suction air passage portion 14a of the cooling fan device 11, the sirocco fan 15 is covered by the fan cover 22a, and the plate-like cover 14d provided in the suction air passage portion 14a and the opening of the case 22 are covered. An air outlet for blowing cooling air into the substrate storage case 21 is formed by the portion 22b.

  In addition, two cooling air discharge ports 22 c and 22 d are provided on the upper surface of the case 22 along the direction in which the cooling air from the sirocco fan 15 flows. The cooling air discharge port 22d is located on the most downstream side of the cooling air flow in the substrate storage case 21, and has a larger opening area than the cooling air discharge port 22c. These cooling air discharge ports 22c and 22d are connected to the cooling duct 31 shown in FIG.

  A circuit board 24 on which an inverter circuit for supplying a predetermined high frequency power to the heating coil is mounted is stored in the circuit board storage case 21 in which the two cases 22 and 23 are combined. A power supply / drive circuit for driving the motor 13 of the cooling fan device 11 is also mounted on the circuit board 24 apart from the inverter circuit portion.

  An assembly in which the cooling fan device 11 and the substrate storage case 21 are integrally assembled is stored and fixed in the right cooling chamber 6R and the left cooling chamber 6L as a cooling unit. The intake port 11 b of the cooling fan device 11 is disposed on the back side of the main body case 2.

  Here, the intake duct 11a configured in the cooling fan device 11 will be described in detail with reference to FIGS. 5, 6, 7, and 8. FIG. 5 is an external view of the cooling fan device according to Embodiment 1 of the present invention as viewed from the rear side of the intake duct, and FIG. 6 is an external view of the cooling fan device according to Embodiment 1 of the present invention as viewed from above. 7 is a side view of the cooling fan device according to the first embodiment of the present invention as viewed from the back side of the motor mounting surface, and FIG. 8 is a cross-sectional view taken along the line AA shown in FIG.

  As shown in FIGS. 5 and 6, the motor cases 12 and 14 are combined, and the intake duct 11a is integrally formed. When the intake duct 11a is viewed from above, the fan mounting surface side surface 10a on the surface side on which the sirocco fan 15 is mounted and the back side of the motor support plate 14f on which the motor 13 is mounted, that is, the motor support plate 14f across the motor 13 is sandwiched. And the four sides of the front surface 10c and the rear surface 10d, and the uppermost end formed by the four surfaces is the intake port 11b.

  When the cooling fan device 11 is viewed from the side, as shown in FIG. 7, there is a vertical wall surface over a predetermined length from the rear surface 10d side, and a predetermined lower wall of the vertical wall surface is connected to the cylindrical air passage portion 12a. It is continuous via an inclined surface with an angle X (an inclined portion 14g described later). In other words, the air flow path leading to the downstream side of the cooling air introduced from the air intake port 11b is inclined to the front surface 10c side (the direction of the water discharge port 12d) at a predetermined angle X (downwardly inclined state) from the middle thereof. 17

Reference numeral 16 denotes a motor case intake portion. As shown in FIG. 8, the lateral width of the inlet for introducing the cooling air is W1 (about 55 mm), and the downstream side communicates with the cylindrical air passage portion 12a. Yes.
As shown in FIG. 8, the air inlet 11 b is formed to have a width W2 (about 85 mm) which is larger than the width W1 corresponding to the motor case intake portion 16. That is, the fan mounting surface side surface 10a of the air intake port 11b forms a vertical wall at a position separated by a predetermined dimension (= W2−W1) on the sirocco fan 15 side with respect to the inlet of the motor case intake portion 16. When viewed from the inlet of the motor case intake portion 16, the width of the inlet is expanded to W2.
Reference numeral 14g denotes an inclined portion extending from the aforementioned fan mounting surface side surface 10a to the inlet of the motor case intake portion 16, and as shown in FIG. 8, the whole is inclined at a predetermined angle X (45 degrees or less), and the inner surface thereof The whole has a flat surface so that a liquid such as water can flow smoothly.

  Here, the direction of expansion of the motor case intake portion 16 is expanded toward the fan mounting surface side surface 10a side, but on the right side of the motor mounting surface rear surface side surface 10b in FIG. The right partition plate 3R is provided immediately next to the heating chamber 9 and the right cooling chamber 6R to suppress the influence of heat. Thereby, there is no room on the right side to make room for enlarging the intake port 11b. On the other hand, on the fan mounting surface side surface 10a side, there is a space that becomes a dead space at the upper portion of the width where the sirocco fan 15 is mounted, and the space can be expanded by effectively utilizing the space.

  In the electromagnetic induction heating cooker configured as described above, when the cooker body 1 is used, water may be accidentally caused to flow over the top plate, or spilling may occur during cooking. When a liquid such as water or hot water enters the intake port 11b, the intake duct 11a is provided with an inclined portion 14g continuous with the lower end on the side surface 10a on the fan mounting surface side. The infiltrated liquid has a low resistance as shown in FIG. 9 (a), and therefore smoothly flows downward along the inclined portion 14g without splashing in the middle, and enters the cylindrical air passage portion 12a along the air inlet facing surface 17. To the curved surface and discharged from the drain port 12d.

At this time, as shown in FIG. 9B, when the horizontal portion 14k having a horizontal upper surface is provided instead of the inclined portion 14g, the liquid that has entered from the air inlet 11b jumps when it collides with the horizontal portion 14k, There is a possibility that the liquid will infiltrate into the motor 13 and the substrate storage case 21 due to the fine droplets being scattered and sucked together with the cooling air from the motor case intake section 16 and the motor 13 and the circuit board 24 may be broken. Get higher.

  Then, while the cooker body 1 is in use, the cooling fan device 11 is driven and sucks the indoor air as cooling air from the intake port 11b, but the cooling air sucked into the intake port 11b passes through the intake duct 11a. Then, the air is sucked from the motor case intake portion 16 into the cylindrical air passage portion 12a. Here, since the inclined portion 14g is provided in the intake duct 11a, the cooling air can be smoothly guided to the motor case intake portion 16 with less resistance as shown in FIG. 9C, and the cylindrical air passage portion 12a. Cooling air can be taken in smoothly.

At this time, as shown in FIG. 9 (d), when the horizontal portion 14k having a horizontal upper surface is provided instead of the inclined portion 14g, the bending pressure loss of the cooling air sucked from the intake port 11b is large, or suddenly Cooling air can be hindered by a small bend, which reduces cooling efficiency.

  As described above, in the first embodiment, the inclined portion 14g is provided on the side surface 10a on the fan mounting surface side of the intake duct 11a, and the intake port facing surface 17 facing the intake port 11b is inclined, so that the intake port is mistakenly made. Even if a liquid such as water enters 11b, the liquid can smoothly flow to the drain port 12d without being splashed and discharged. Therefore, even if the motor 13 is driven and the sirocco fan 15 sucks the cooling air, the liquid does not splash, so that the liquid 13 can be prevented from entering the motor 13 and the substrate storage case 21, and the motor 13 and the circuit board 24 can be The effect that it becomes possible to aim at the improvement of the safety | security of the cooker main body 1 without being broken down is acquired.

  Further, the inclined portion 14g is provided on the fan mounting surface side surface 10a of the intake duct 11a, and the intake port facing surface 17 facing the intake port 11b is inclined, so that the bending pressure loss of the cooling air sucked from the intake port 11b is reduced. Can be suppressed, the intake efficiency is increased, and the energy consumption of the cooling fan device 11 can be suppressed.

In the first embodiment, W1 is about 55 mm, W2 is about 85 mm, and W2 is about 1.5 times as large as W1, but W1 and W2 are the structure of an electromagnetic induction heating cooker and a cooling fan. The dimension is set as appropriate depending on the capability of the apparatus, and is not limited to this dimension.
In addition, the above-mentioned predetermined angle X is a dimension that is appropriately set depending on the configuration of the electromagnetic induction heating cooker, the capacity of the cooling fan device, and the like. It is desirable to set.

  In the first embodiment, the air inlet facing surface 17 that faces the air inlet 11b from the rear surface 10d side to the front surface 10c side (the direction of the water outlet 12d) from the middle of the cylindrical air passage portion 12a is set at a predetermined angle. Although it has been described that it is inclined with the inclination of X, it may be a curved surface instead of the inclined surface.

Embodiment 2. FIG.
FIG. 10 is a sectional view of the intake duct of the cooling fan device according to the second embodiment of the present invention.
In the first embodiment, the inclined portion 14g is provided on the side surface 10a of the fan mounting surface of the intake duct 11a. 10), it is possible to provide an inclined portion 14h on the motor mounting surface rear side surface 10b side as shown in FIG. 10, and there is no liquid splash as in the first embodiment. Therefore, it is possible to prevent liquid from entering the motor 13 and the like, and to improve the safety of the cooker body 1.
Further, it is possible to obtain an effect that the bending pressure loss of the cooling air can be suppressed, the intake efficiency is increased, and the energy consumption of the cooling fan device 11 can be suppressed.

Embodiment 3 FIG.
FIG. 11 is a sectional view of an intake duct of the cooling fan device according to the third embodiment of the present invention.
In the first embodiment, the inclined portion 14g is provided only on the fan mounting surface side surface 10a of the intake duct 11a. However, the motor mounting surface rear side surface 10b and the left and right partition plates 3R, 3L (Fig. 11), it is possible to provide an inclined portion 14h on the motor mounting back side surface 10b side as shown in FIG. 11, and the liquid splashes as in the first embodiment. Therefore, it is possible to prevent liquid from entering the motor 13 and the like, and to improve the safety of the cooker body 1.
Further, it is possible to obtain an effect that the bending pressure loss of the cooling air can be suppressed, the intake efficiency is increased, and the energy consumption of the cooling fan device 11 can be suppressed.
In the present embodiment, the left and right enlarged dimensions are the same, but the left and right dimensions may be different.

Embodiment 4 FIG.
12 is an external view of the cooling fan device according to the fourth embodiment of the present invention as viewed from above, and FIG. 13 is a side view of the cooling fan device according to the fourth embodiment of the present invention as viewed from the back side of the motor mounting surface. is there.
As shown in FIGS. 12 and 13, the intake duct 11 a is inclined and expanded from the dimension D1 in the depth direction toward the rear surface 10 d toward the dimension D2 in the depth direction with an inclination of a predetermined angle X.

In the first embodiment, the inclined portion 14g is provided on the side surface 10a on the fan mounting surface side of the intake duct 11a. However, as shown in FIGS. 11 and 12, when the space can be secured on the rear surface 10d side of the intake port 11b, the rear surface 10d. It is possible to provide the inclined portion 14j on the side, and since there is no liquid splash as in the first embodiment, it is possible to prevent the liquid from entering the motor 13 and the like, and to improve the safety of the cooker body 1 Can be obtained.
Further, it is possible to obtain an effect that the bending pressure loss of the cooling air can be suppressed, the intake efficiency is increased, and the energy consumption of the cooling fan device 11 can be suppressed.

In the fourth embodiment, D1 is about 25 mm, D2 is about 38 mm, and D2 is about 1.5 times as large as D1, but D1 and D2 are the structure of an electromagnetic induction heating cooker and a cooling fan. The dimension is set as appropriate depending on the capability of the apparatus, and is not limited to this dimension.
In addition, the above-mentioned predetermined angle X is a dimension that is appropriately set depending on the configuration of the electromagnetic induction heating cooker, the capacity of the cooling fan device, and the like. It is desirable to set.
Further, in the present embodiment, the image is enlarged to the rear side, but may be enlarged to the front side.

1 cooker body, 2 body case, 3R, 3L left and right partition plates, 3a, 3b notch,
4 Horizontal partition plate, 5 Rear partition plate, 5a Exhaust hole, 6R Right cooling chamber, 6L Left cooling chamber,
7 Upper parts chamber, 8 Exhaust chamber, 9 Grill heating chamber, 9a Grill door, 9b Exhaust duct, 10a Fan mounting surface side surface, 10b Motor mounting surface rear side surface, 10c Front surface,
10d rear surface, 11 cooling fan device, 11a intake duct, 11b intake port,
12 Motor case, 12a Cylindrical air passage, 12b Opening, 12c Motor mounting side duct component, 12d Drain, 13 Motor, 13a Rotating shaft, 14 Motor case, 14a Suction air passage, 14b Through hole, 14c Fan Installation surface side duct component,
14d plate-like cover, 14e support member, 14f motor support plate, 14g inclined part, 14h inclined part, 14j inclined part, 14k horizontal part, 15 sirocco fan,
16 Motor case air intake, 17 Air inlet facing surface, 21 Substrate storage case,
22, 23 case, 22a fan cover, 22b opening,
22c, 22d Cooling air outlet, 24 Circuit board

Claims (6)

A motor case having a through hole on one side and further having a drain outlet inside;
A motor provided around the axis of the through hole in the motor case,
A fan disposed outside the through hole of the motor case and attached to the rotating shaft of the motor;
A board storage case mounted on the motor case and rotatably stored between the fan and the motor case;
An intake duct provided in the motor case and having an intake port serving as a cooling air inlet into the motor case;
A motor case intake section that is downstream of the intake port in the motor case and for supplying cooling air to the fan;
The electromagnetic induction heating cooker, wherein the air intake duct is continuous such that a space from the motor case air intake portion to the air intake port gradually increases in diameter as it approaches the air intake port.   2. The electromagnetic induction heating according to claim 1, wherein a space from the motor case intake portion to the intake port is continuous with an inclined plane having a predetermined angle X or a curved surface having a predetermined curvature. Cooking device.   3. The diameter increasing direction from the motor case intake portion to the intake port is the fan mounting surface side, the motor mounting back surface side, or both sides thereof. Electromagnetic induction heating cooker.   In the intake duct, a space from the motor case intake portion to the intake port is an inclined plane having a predetermined angle X from a predetermined depth near the motor case intake portion or a curved surface having a predetermined curvature. The electromagnetic induction heating cooker according to any one of claims 1 to 3, wherein the induction cooker is continuous so that the diameter gradually increases as it approaches the intake port.   2. The surface that faces when facing downward from the intake port is inclined at a predetermined angle X from the rear surface side of the intake duct to the front surface side, or is curved with a predetermined curvature. The electromagnetic induction heating cooking appliance in any one of Claim 4.   The electromagnetic induction heating cooker according to any one of claims 1 to 5, wherein the predetermined angle X is 45 degrees or less.

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