JP2007325868A - Electric rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker in which even an electromagnetic induction heating means in an outer periphery side curved face part on the bottom part of a non-metallic inner pot can be effectively cooled. <P>SOLUTION: The electric rice cooker includes a non-metallic inner pot which can be heated by electromagnetic induction heating via a first induction heating element provided at the bottom center face and a second induction heating element provided on the outer periphery side curved face, an inner case to house the inner pot, an outer case to house and fix the inner case, a first electromagnetic induction heating means to apply electromagnetic induction heating to the inner pot via the first induction heating element, and a second electromagnetic induction heating means to apply electromagnetic induction heating to the inner pot via the second induction heating element. A blower fan to cool electric components is provided at the outer case and a ventilation path to make cooling air from the blower fan flow is provided at the first electromagnetic heating means part on the bottom part of the inner case. Air from the blower fan cools the first electromagnetic induction heating means via the ventilation path, and then, the air is made to blow out in a direction of the second electromagnetic induction heating means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to the structure of an electric induction cooker of an electromagnetic induction heating type that employs a non-metallic inner pot.

  In recent electric rice cookers, because of high output, high heating efficiency, and high output control responsiveness, it is possible to cook delicious rice quickly, and the inner pot (rice cooker) itself can be cooked. There are many electromagnetic induction heating types that use electromagnetic induction heating means that self-heats by inducing eddy currents in the inner pot by electromagnetic induction, while being formed of a metal material.

  In the case of such an electric rice cooker, a so-called work coil is adopted as the electromagnetic induction heating means, and the winding width is wide with respect to the bottom wall surface of the bottomed cylindrical inner case (protective frame) that houses the inner pot. The first work coil is installed along the pair of work coils, or wound on the center side of the bottom wall surface and the first work coil on the outer peripheral side (curved surface) of the bottom wall surface. Induction heating structure is adopted in which two sets of inner and outer work coils with a second work coil wound at a predetermined interval are installed in a curved shape along the bottom shape of the inner pot. Of course, there is also a work coil provided on the side surface of the inner case as required.

  By the way, in the case of adopting such electromagnetic induction heating means, in order to make the cooked rice better, an inner pot made of a non-metallic material such as ceramic, for example, instead of the inner pot made of the metal material ( The use of so-called clay pots is also being considered.

  In that case, the inner pot itself does not generate heat due to electromagnetic induction. A second induction heating element (for example, silver paste) is disposed, and each induction heating element is induction-heated by corresponding first and second electromagnetic induction heating means such as the work coil, thereby A heating structure for heating is employed (see, for example, Patent Document 1).

Japanese Patent Application No. 2006-50257 (Specification, page 1-9, FIG. 1-9)

  However, when the non-metallic inner pot is adopted as described above, the induction heating element generates heat locally because the heat conductivity of the inner pot is not good, and convection is less likely to occur due to indirect heating. Therefore, there is a problem that the water and rice contained in the inner pot are difficult to be heated uniformly.

  In addition, the temperature of the inner case (protective frame) and work coil rises due to heat conduction and radiant heat from the induction heating element and the inner pan. Therefore, special consideration is given to the heat resistance temperature of the inner case (protective frame) and work coil. There is also a problem that heat resistance measures are required and it is difficult to increase the amount of heating for cooking rice.

  In particular, the induction heating element portion becomes locally high in temperature, and the temperature of the corresponding work coil portion is likely to rise due to the influence of the radiant heat.

  Therefore, it is conceivable to cool the work coil portion by flowing cooling air from the fan, but the cooling air flows along the flat surface at the center of the bottom wall of the inner case where the first work coil is installed. However, there is a problem that the second work coil installed on the outer peripheral curved surface portion of the bottom wall portion does not effectively receive the cooling air.

  The present invention has been made to solve such a problem, and the second electromagnetic induction heating means on the outer peripheral side of the inner case bottom is used as the wind after cooling the first electromagnetic induction heating means at the bottom center. The purpose is to provide an electric rice cooker that effectively improves the heating efficiency of the inner pot while raising the heat-resistant limit temperature of each work coil by guiding in the direction and raising it from the bottom to the outer peripheral side. It is what.

  In order to achieve the same object, the present invention is configured with the following problem solving means.

(1) Invention of Claim 1 The electric rice cooker of this invention is electromagnetic induction via the 1st induction heating body provided in the bottom center surface, and the 2nd induction heating body provided in the bottom outer peripheral side curved surface. A non-metallic inner pot that can be heated, an inner case that removably accommodates the inner pot, an outer case that accommodates and fixes the inner case, and a center wall of the bottom wall of the inner case, A first electromagnetic induction heating means for electromagnetically heating the inner pot via the first induction heating element; and a bottom wall portion outer peripheral side curved surface of the inner case, wherein the inner pot is the second induction An electric rice cooker comprising second electromagnetic induction heating means for electromagnetic induction heating via a heating element is provided with a blower fan for cooling electrical components in the outer case and the first of the inner case bottom Cooling air from the blower fan flows to the electromagnetic induction heating means. A ventilation path is provided, and the air from the blower fan is further blown out toward the second electromagnetic induction heating means after cooling the first electromagnetic induction heating means through the ventilation path. It is characterized by that.

  According to such a configuration, the wind from the electric component cooling fan cools the first electromagnetic induction heating means at the center of the bottom wall of the inner case through the ventilation path, and then the bottom wall further from the air outlet portion. Since the second outer peripheral side curved surface portion is blown toward the second electromagnetic induction heating unit, the second electromagnetic induction heating unit of the outer peripheral side curved surface portion of the bottom wall portion can be effectively cooled. become able to.

(2) Invention of Claim 2 The electric rice cooker of this invention is the structure of the said invention of Claim 1, The inlet_port | entrance part of the cooling wind in a ventilation path is provided in one place corresponding to the air blowing side of a fan. On the other hand, a plurality of outlets are provided in the circumferential direction.

  According to such a configuration, the cooling air is uniformly supplied over the entire second electromagnetic induction heating means of the curved surface portion on the outer peripheral side of the bottom wall portion of the inner case, thereby enabling more effective cooling. Become.

  As a result, according to the present invention, it is possible to effectively cool the electromagnetic induction heating means at the center of the inner case bottom wall and the electromagnetic induction heating means of the curved surface on the outer peripheral side of the inner case bottom wall.

  Therefore, it is possible to provide an electric rice cooker that effectively improves the heating efficiency of the inner pot while increasing the heat-resistant limit temperature of each electromagnetic induction heating means.

(Best Embodiment 1)
1-8 has shown the structure of the rice cooker main body and each part of the electric rice cooker which concerns on the best Embodiment 1 of this invention.

(Overall configuration)
First, in the electric rice cooker according to the best embodiment 1, for example, a pot (for example, a ceramic earthen pot) made of a non-metallic material is employed as the inner pot (rice cooker or heat insulation container) 3, and its bottom wall The bottom central surface (flat surface) of the portion 3a and the curved surface portion (R surface portion) on the outer periphery of the bottom wall portion 3a are capable of self-heating by eddy currents induced therein, for example, silver of about several tens of microns φ The first and second induction heating elements G ₁ and G ₂ made of metal such as a silver paste made of a mixture of the granular material and the resin are provided.

Bottom first induction heating element G ₁ in the center of the bottom wall portion 3a, as shown in FIG. 8, the two inner and outer double ring structure and the non-heat generating portion provided in the middle of the center O and the radial direction The donut heating elements Ga and Gb are used.

  That is, the electric rice cooker has an inner pot 3 having the same configuration, a dish-shaped bottom wall portion 4 made of a lower side synthetic resin and an upper side cylindrical shape formed so that the inner pot 3 can be arbitrarily stored and set. An inner case (protective frame) 46 made of the side wall portion 6, a bottomed cylindrical outer case 1 a that is an outer casing for holding the inner case 46, and the outer case 1 a and the inner case 46 are integrated. It is comprised from the lid unit (lid) 2 provided in the upper part of the formed rice cooker main body 1 so that opening and closing is possible.

A coil cover 40 having ferrite core storage portions 40c, 40c,... Is provided below the bottom wall portion 4 of the inner case 46, and a ferrite core is disposed below the coil cover 40 (not shown). Between them, it corresponds to the positions of the _first and _second induction heating elements G ₁ and G ₂ on the center side flat surface and the outer peripheral side curved surface of the bottom wall portion 3a of the inner pot 3. The first and second sets of work coils C ₁ and C ₂ each having a litz wire wound concentrically are provided, and the _first and second sets of the inner pot 3 are energized when they are energized. An induction current is induced in the induction heating elements G ₁ and G ₂ to heat the inner pot 3.

  The dish-shaped bottom wall portion 4 of the inner case 46 has a sensor portion fitting port 4f of the center sensor CS formed in the center of the bottom surface portion 4a, and an outer peripheral side upper surface of the sensor portion fitting port 4f. A donut-shaped heat shield plate 30 is provided. Further, a flange-like step portion 4c projecting outward in the predetermined width radial direction is provided on the upper end side of the outer peripheral side curved surface portion 4b, and the lower end 6a of the upper-side cylindrical side wall portion 6 is provided on this step portion 4c portion. The side is engaged.

  On the other hand, the upper end 6b of the upper side tubular side wall 6 is connected and fixed to the shoulder member 11 at the upper end of the rice cooker body 1 side outer case 1a via the inner frame member 9.

Further, on the upper side periphery of the cylindrical side wall portion 6 of the inner case 46 is kept heater H ₁ of, for example, a code heater functions as a heating means during cooking and insulation is provided, during cooking and during warmth The whole inner pot 3 is heated effectively and uniformly.

  Incidentally, in the case of the present embodiment, for example, as shown in FIGS. 1, 2, and 7, between the bottom 4 a of the lower side bottom wall 4 of the inner case 46 and the bottom wall 40 a of the coil cover 40. Is formed with a ventilation path extending from the front side to the rear side.

(Composition of ventilation path)
This ventilation path is formed as follows.

That is, on the outer periphery of the bottom surface of the bottom portion 4a of the bottom wall portion 4 of the inner case 46, as shown in FIGS. 3 and 4, for example, arcuate thin cylindrical walls (thin ribs) 4e and 4e are provided in the circumferential direction. Are provided with cutout portions 26a and 26b having no cylindrical wall 4e at the front and rear thereof, and a plurality of trapezoidal ribs L having a plane triangle shape therebetween. _{1 to} L ₁₂ are provided so as to be scattered at desired positions and in desired directions at desired intervals.

Further, on the outer periphery of the upper surface portion of the bottom wall portion 40a of the coil cover 40, a similar arc-shaped thin wall corresponding to the lower surface side cylindrical walls 4e, 4e of the bottom portion 4a of the bottom wall portion 4 of the inner case 46 is provided. One cylindrical wall (thin ribs) 40b, 40b is erected upward, and a plurality of planar ribs L _{1 to} L ₁₂ having a planar triangle shape are provided between the inner case 46 and the cylindrical walls (thin ribs) 40b. It is provided so as to be scattered in a symmetrical positional relationship with the plate-like ribs L _{1 to} L ₁₂ of the bottom wall portion 4.

  Further, in the case of this coil cover 40, a radial position facing the rear side notch portion 26b of the outer peripheral edge of the bottom wall portion 40a located at the outer side in the radial direction by a predetermined width than the first cylindrical walls 40b, 40b. In this case, a thin second cylindrical wall (thin rib) 40d having an arc angle width sufficiently larger than the arc angle width of the opening of the rear side cutout portion 26b is erected upward.

The cylindrical walls 4e and 4e of the bottom wall portion 4 of the inner case 46 and the first cylindrical walls 40b and 40b of the bottom wall portion 40a of the coil cover 40 are, for example, relative to the bottom wall portion 4 of the inner case 46. when fitted from below the coil cover 40 through the first work coil C _1, for example 1, 2, and each other fitted in a state of sliding contact with each other as shown in FIG. 7, a first workpiece A substantially circular ventilation space surrounding the periphery of the coil C ₁ is formed.

Further, in this fitted state, the spiral wire rings of the first work coil C ₁ are positioned on both the upper and lower sides and are opposed to the trapezoidal ribs L _{1 to} L ₁₂ , L _{1 to} L _12. The airflow spaces a and b are formed on the upper and lower sides of the _first work coil C1 in a stable state in between (see FIGS. 1 and 7).

On the other hand, the ventilation path surrounding the first work coil C ₁ formed between the cylindrical walls 4e, 4e and the first cylindrical walls 4b, 4b in this way is formed by the front side cutouts 26a, 26a. The facing portion serves as an inlet portion for cooling air, while the facing portion of the rear-side cutout portions 26b and 26b serves as an outlet portion for cooling air.

  And the inner peripheral surface of the 2nd cylindrical wall 40d of the said outer periphery of the said coil cover 40 respond | corresponds to the same horizontal surface shape with respect to the cooling wind blower outlet part of the rear part side.

On the other hand, the cooling air inlet formed by the front-side notches 26a and 26a has a flat surface in which the front-side lower surface is greatly opened obliquely in the rear direction as shown in FIGS. 1 and 2, for example. A rectangular cooling air introduction cylinder 25 is connected via connecting walls 25b and 25b, and the electrical component is installed at the front bottom in the main body case 1a of the rice cooker body 1 via the cooling air introduction cylinder 25. A part of the cooling air from the equal cooling fan (short axis axial fan) 23 is introduced to flow into the ventilation space (ventilation space a, b) of the first work coil C ₁ side ventilation passage. It has become.

The cooling fan 23 for cooling electrical components and the like is installed in such a manner that about 1/2 of the diameter of the fan impeller corresponds to the inclined opening 25a portion on the lower surface side of the cooling air introduction tube 25, while the other 1 / The two portions are installed corresponding to the heat sink 24 for heat radiation from the IGBT or the like, the power supply board and the control board B ₁ , the microcomputer board B _{2, and the} like.

  Note that reference numeral 22 in FIG. 1 denotes an air suction port of the fan 23 provided in a bottom member (bottom cover) 1b portion that is fitted and integrated with the bottom portion of the main body case 1a.

According to such a configuration, the wind from the fan 23 is used for cooling the power supply board, the control board B ₁ , the microcomputer board B ₂ , the IGBT heat sink 24, etc. on the front side of the rice cooker body 1, for example. On the other hand, after being introduced into the ventilation space of the ventilation path surrounding the first work coil C ₁ as the heat generating member through the cooling air introduction cylinder 25 and effectively cooling the _first work coil C _1. The cooling air is blown out in the horizontal direction from the cooling air blowout portion formed by the rear side cutout portion 26b of the bottom wall portion 4 of the inner case 46 and the rear side cutout portion 26b of the bottom wall portion 40a of the coil cover 40.

However, the outer peripheral edge of the bottom portion 40a of the radially outer coil cover 40 of the air outlet portion of the cooling air, a second tubular that height erected predetermined upward second work coil C ₂ Direction since the wall 40d is present, the second cylindrical wall 40d becomes wind direction guide plate from below to above, the cooling air about to be blown out in the horizontal direction, the upper-side second work coil C ₂ direction Thus, the second work coil C ₂ provided on the outer curved surface portion of the bottom wall portion 4 of the inner case 46 is also efficiently cooled.

Moreover, in this case, the plurality of trapezoidal ribs L _{1 to} L ₁₂ and L _{1 to} L ₁₂ that support the wire ring of the first work coil C ₁ on both the upper and lower sides are shown in FIGS. As shown in detail, the planar shape is a triangular shape (V shape) with a small apex angle, and the first, the apex angle direction, and the installation position are set appropriately, whereby the first The work coil C ₁ is supported in a stable and easy-to-cool manner, and the flow direction and the flow state of the cooling air are controlled so that the cooling efficiency is as high as possible with a low pressure loss. It has become.

(Configuration of operation unit etc.)
On the other hand, the above-mentioned rice cooking, timer reservation for the heat retention function, selection of rice cooking and heat retention menu, operation settings such as heating amount, heating pattern, heat retention temperature, heat retention time, heat retention OFF control mode corresponding to each menu are related to the electric rice cooking This is performed by the user through various input switch groups of the operation panel 20 provided on the front surface of the main body 1, and finally the first and second work coils C ₁ , C ₂ and the like according to the set contents. The heat retaining heater H ₁ and the lid heater H ₂ are appropriately controlled.

  The switches on the operation panel 20 are, for example, a rice cooker switch (ON display unit), a timer reservation switch (ON display unit), a cancel switch, a heat retention switch (ON display unit), a reheating switch, a menu selection switch, an hour switch, a minute switch It consists of a switch, a heat insulation OFF control mode selection switch (ON display part), and the like.

  In addition, at the center of the operation panel 20, there is a liquid crystal display unit 21 for displaying each menu of rice cooking and heat retention, a set heat retention temperature, a set heat retention time, a current time, a remaining time until the completion of rice cooking, and other necessary items. Is provided.

(Configuration of center sensor)
Further, as described above, a center sensor fitting opening (center sensor storage space) 4f penetrating concentrically in the vertical direction as described above is formed at the center of the lower dish-shaped bottom wall 4 of the inner case 46. The center sensor includes an inner pot temperature detection sensor S ₁ and an inner pot detection switch S ₂ in a state in which the center sensor fitting opening 4f can be moved up and down in a vertical direction and is always upwardly biased by a coil spring. CS is provided.

(Configuration of lid unit)
On the other hand, reference numeral 2 denotes a lid unit. The lid unit 2 comprises an outer cover 12 made of a synthetic resin that constitutes an outer peripheral surface of the lid unit 2 and a pressure adjusting pipe 15 at the center, and is fitted inside the outer cover 12. A synthetic resin inner frame 13 provided integrally, a packing 14a and a metal heat radiating plate 16a in the inner opening of the inner frame 13, and a lid heater H ₂ provided on the upper surface of the heat radiating plate 16a. And a metal inner lid 16b provided below the heat radiating plate 16a. Further, packings 14a and 14b are respectively provided below the outer peripheral edge of the heat radiating plate 16a and below the outer peripheral edge of the inner lid 16b. The inner lid 16b is connected to the opening edge of the inner pot 3 via the packing 14b. It is made to contact the upper surface part of the part 3c. Further, 15a is a pressure regulating valve in the pressure regulating pipe 15, and 15b is a lower side cap thereof.

  The lid unit 2 is rotatably attached to the shoulder member 11 on the rear end side of the upper portion of the outer case 1 (not shown) via a hinge mechanism. A lock mechanism 10 is provided that engages with a predetermined position to open and close the lid unit 2 in the vertical direction.

Therefore, in this configuration, at the time of rice cooking, the inner pot 3 is moved from the bottom wall portion 3a to the side wall portion 3b by the eddy current generated by driving the _first and second sets of work coils C ₁ and C _2. The first and second induction heating elements G ₁ (Ga, Gb), G ₂ provided on the side generate heat, and the portion extending from the bottom wall 3a to the side wall 3b of the inner pot 3 is heated and kept warm. sidewalls 3b portion of the inner bowl 3 is heated by the heater H _1.

In addition, in this state, the cooling air is efficiently supplied to the first and second work coils C ₁ and C ₂ by the cooling fan 23 for electrical components and the like as described above, and the first and second work coils are supplied. The work coils C ₁ and C ₂ are effectively cooled. As a result, an effective output can be given to each of the work coils C ₁ and C ₂ , for example, when the amount of cooked rice is large, the entire inner pot 3 is heated almost uniformly and cooked efficiently without uneven heating. be able to.

  Moreover, the local heat concentration of the bottom wall 3a of the inner pot 3 in the state where the water after the boiling process is eliminated can be prevented, and the occurrence of scorching can be prevented.

(Regarding the configuration of the first induction heating element)
By the way, in the inner pot 3 of this Embodiment, in order to heat the nonmetallic inner pot 3 as mentioned above, two places, the flat surface part of the bottom part 3a center of the inner pot 3, and the curved surface part of the bottom part 3a outer periphery. The first and second induction heating elements G ₁ and G ₂ made of silver paste are joined and integrated, and the first induction heating element G _{1 at} the center of the bottom 3a is, for example, FIG. As shown in FIG. 8, it is formed by two donut-like heating elements Ga and Gb having an inner and outer double ring structure in which a non-heating portion is provided at two portions in the middle of the central portion O and the radial direction. The two non-heating portion of the central portion O and a radially middle temperature sensor S ₁ of these centers sensor CS abuts is no ceramic inner Nabeyaki smooth glaze surface when sintered (granular silver paste each smoothing Surface).

Therefore, to never damage the sensor surface be repeatedly contact temperature sensor S ₁ of the center O portion to the center sensor CS, also not the temperature of the heating element itself, the temperature of the inner pot 3 itself as much as possible accurate Can be detected.

  In addition, it is possible to make the entire center surface of the bottom 3a of the inner pot 3 a single heating element without forming a non-heating part in the middle of the radial direction. Since there is no temperature gradient, the heat generated in the region is constrained at that portion and is not conducted because it is not conducted elsewhere. And the temperature of the area | region rises locally too much, and it may become a cause of generating scorching.

  However, if a non-heat generating portion having a predetermined width is provided in the middle of the radial direction as described above, the heat of the restraining portion can be dispersed, and the heating temperature distribution at the center of the bottom portion 3a of the inner pot 3 can be made uniform. Also, the occurrence of scorching can be prevented.

In addition, the distribution output on the _first work coil C ₁ side can be reduced correspondingly, and the distribution output to the second work coil C ₂ on the outer peripheral side can be increased. As a result, it is possible to improve the heating performance on the side wall 3b side of the inner pot 3 where heat is not easily transmitted without changing the rated output.

  In addition, the material cost of the induction heating element such as silver paste can be saved.

When such a configuration of the induction heating element is adopted, as described above, the heat generation amount of the second induction heating element G ₂ is particularly large, and the second work coil C ₂ portion is affected by the radiant heat. since it is heated by receiving, becomes extremely effective effectively configuration capable of supplying cooling air to the second work coil C ₂ as described above.

Of course, the rear side cooling air outlets (26b, 26b) in the above-described ventilation path configuration are the portion of the second induction heating element G ₂ that generates the largest amount of heat and the second work coil C ₂ . Install the unit corresponding to the part where the temperature is most likely to rise.

(Best Mode 2)
Next, FIG. 9 has shown the structure of the rice cooker main body of the electric rice cooker which concerns on the best Embodiment 2 of this invention.

In the electric rice cooker in the best embodiment 2 of FIG. 9, in the configuration of the electric rice cooker in the best embodiment 1 described above, each of the bottom wall portion 4 side and the coil cover 40 side of the inner case 46 described above. predetermined cylindrical wall 4e, 4e, 40b, (see reference numeral 261 to 265 in FIG. 9) notch by increasing the 40b, the cooling air outlet portion of the first air passage surrounding the work coil C ₁ circumferential direction A plurality of locations are provided at intervals of.

According to such a configuration, the wind from the electrical component cooling fan 23 cools the first work coil C ₁ at the bottom center of the bottom wall 4 of the inner case 46 through the ventilation path, and then the circumferential direction. Since the second work coil C ₂ of the entire outer peripheral curved surface portion of the bottom wall portion 4 is blown out from the plurality of cooling air outlets in particular toward the entire circumferential direction, the bottom outer peripheral curved surface portion The second work coil C ₂ can be uniformly cooled.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view taken along a front-rear direction center showing the configuration of a rice cooker body of an electric rice cooker according to the best embodiment 1 of the present invention. It is a bottom view of the state which removed the bottom member which shows the structure of the bottom part of the electric rice cooker main body. It is a bottom view which shows the structure of the inner case bottom wall part of the electric rice cooker main body. It is a BB cut sectional view of Drawing 3 showing the composition of the inner case bottom wall part of the electric rice cooker main part. It is a top view which shows the structure of the coil cover bottom wall part of the electric rice cooker main body. It is CC sectional view taken on the line of FIG. 5 which shows the structure of the coil cover bottom wall part of the electric rice cooker main body. It is the sectional view on the AA line of FIG. 2 which shows the structure of the inner case bottom wall part of the electric rice cooker main body. It is a bottom view which shows the structure of the inner pot bottom wall part of the same electric rice cooker main body. It is a bottom view of the state which removed the bottom member of the rice cooker main part bottom part of the electric rice cooker which concerns on best Embodiment 2 of this invention.

Explanation of symbols

C ₁ is a first work coil, C ₂ is a second work coil, H ₁ is a heat retaining heater, H ₂ is a lid heater, G ₁ is a first induction heating element, G ₂ is a second induction heating element, 1 is a rice cooker body, 1a is an outer case, 1b is a bottom member, 2 is a lid unit, 3 is an inner pot, 4 is an inner case bottom wall, 4e is a cylindrical wall, 16 is a heat sink, and 23 is an electrical component cooling , 25 is a cooling air introduction cylinder, 40 is a coil cover, 40b is a first cylindrical wall, and 40d is a second cylindrical wall.

Claims (2)

  A non-metallic inner pot capable of electromagnetic induction heating via a first induction heating element provided on the bottom center surface and a second induction heating element provided on the bottom outer peripheral curved surface, and the inner pot An inner case that is removably accommodated, an outer case that accommodates and fixes the inner case, and a central wall of the bottom wall of the inner case, and the inner pot is heated by electromagnetic induction via the first induction heating element First electromagnetic induction heating means, and second electromagnetic induction heating means provided on the curved surface on the outer peripheral side of the bottom wall portion of the inner case, for heating the inner pot via the second induction heating element. In the electric rice cooker comprising: a ventilation fan for cooling the electrical components in the outer case, and a flow of cooling air from the ventilation fan to the first electromagnetic induction heating means part at the bottom of the inner case A ventilation path is provided, and the ventilation fan is passed through this ventilation path. Wind, electric rice cookers, characterized in that so as to after cooling the first electromagnetic induction heating means, further blown toward the second electromagnetic induction heating means the direction from.   2. The electricity according to claim 1, wherein one inlet portion of the cooling air in the ventilation passage is provided at one location corresponding to the air outlet side of the fan, and a plurality of outlet portions are provided in the circumferential direction. rice cooker.

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